WO2024007713A1 - 定子、扁线电机、动力总成和车辆 - Google Patents

定子、扁线电机、动力总成和车辆 Download PDF

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Publication number
WO2024007713A1
WO2024007713A1 PCT/CN2023/091893 CN2023091893W WO2024007713A1 WO 2024007713 A1 WO2024007713 A1 WO 2024007713A1 CN 2023091893 W CN2023091893 W CN 2023091893W WO 2024007713 A1 WO2024007713 A1 WO 2024007713A1
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WO
WIPO (PCT)
Prior art keywords
slot
stator
layer
parallel branch
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/091893
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English (en)
French (fr)
Inventor
赵素珍
俞东
岳卫东
巫存
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Leapmotor Technology Co Ltd
Original Assignee
Zhejiang Leapmotor Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211252008.8A external-priority patent/CN115955032A/zh
Priority claimed from CN202211252007.3A external-priority patent/CN115765254A/zh
Application filed by Zhejiang Leapmotor Technology Co Ltd filed Critical Zhejiang Leapmotor Technology Co Ltd
Priority to EP23834489.9A priority Critical patent/EP4554059A4/en
Priority to JP2024577407A priority patent/JP2025520912A/ja
Priority to DE212023000291.4U priority patent/DE212023000291U1/de
Priority to AU2023304471A priority patent/AU2023304471B2/en
Publication of WO2024007713A1 publication Critical patent/WO2024007713A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the present application relates to the technical field of flat wire motors, and in particular to a stator, a flat wire motor, a power assembly and a vehicle.
  • the main drive motor is the power output component of the power system and one of the core components of electric vehicles. , the performance index requirements of the main drive motor are also getting higher and higher, such as high power density and torque density, small size and light weight.
  • electric vehicle motors gradually adopt flat wire windings. Flat wire windings can increase the stator slot full rate and further improve the motor power density, efficiency and thermal conductivity.
  • Existing motors mainly use wave winding or stacked winding winding structures.
  • the AC resistance of the motor can be effectively reduced.
  • the wiring methods of the winding structures are also different.
  • the three-phase winding of the current winding structure usually has multiple parallel branches, and circulation currents are easily generated between the branches.
  • there are many types of hairpin coils and the production process is complex and the manufacturing cost is high.
  • the present invention provides a stator, a flat wire motor, a power assembly and a vehicle.
  • the present invention provides a stator for a flat wire motor, including a stator core, the inner wall of the stator core having a plurality of stator slots evenly distributed along its circumferential direction;
  • the stator winding includes three-phase windings, each phase winding includes a plurality of parallel branches, the plurality of parallel branches are rotationally symmetrical in the circumferential direction, and each of the parallel branches includes a plurality of parallel branches connected by connecting wires and with different pitches.
  • Hairpin coils N layers of hairpin coils are provided in any stator slot, the hairpin coils of each parallel branch traverse N slot layers in different stator slots, and the three-phase windings are arranged along the stator
  • the total number of slot layers occupied by each parallel branch in each stator slot is 2n, 2n-1, or 2n, 2n-1, 2n-2.
  • the position of one slot layer is the first layer or the Nth layer of the stator slots.
  • the total number of slot layers occupied by each parallel branch in the stator slot is 2
  • the two slot layers are adjacently arranged in the stator slot, or the two slot layers are respectively the The first and Nth layers in the stator slots.
  • the total number of slot layers occupied by each parallel branch in the stator slot is 3
  • two of the three slot layers are arranged adjacently, and the position of the remaining one slot layer is the third slot layer of the stator slot.
  • One layer or the Nth layer and is separated by four groove layers from the other two groove layers.
  • the four slot layers are divided into two groups, each group is separated by four slot layers, and each group includes two adjacent slot layers. slot layer.
  • each phase winding includes three parallel branches.
  • stator slots is 54 or 72.
  • pitch combinations of hairpin coils in each parallel branch are 8, 9, 11, 12, and 16.
  • the hairpin coil pitch of each parallel branch in the same slot layer is 9.
  • the hairpin coil pitch of each parallel branch in the first slot layer or the Nth slot layer is 8 or 8 or 11.
  • each parallel branch is on the Nth layer of the slot layer, and the outgoing line end is on the N-1th layer of the slot layer, or the incoming line end of each parallel branch is and outlet terminals are both on the first slot layer and the Nth slot layer.
  • the welding pitch between the hairpin coils in each parallel branch is 9 or 11.
  • each parallel branch includes a long-distance hairpin coil with a pitch of s/(2p)+a, an entire-pitch hairpin coil with a pitch of s/(2p)+, and a long-distance hairpin coil with a pitch of s/(2p)+a.
  • A-4 short pitch hairpin coil Among them, s is the number of stator slots, p is the number of parallel branches, and a is an integer greater than or equal to 2 and less than or equal to 4.
  • the first leg and the second leg of the short-distance hairpin coil are located at the kth slot layer and the k+1th slot layer respectively, and the first leg of the long-distance hairpin coil is located at the kth slot layer and k+1th slot layer respectively. and the second leg are respectively located at the k+1th slot layer and the k+2th slot layer.
  • the first leg and the second leg of the full-spacing hairpin coil are distributed in the 1st slot layer or the nth slot layer; where k is An odd number greater than or equal to 1 and less than or equal to n.
  • the number of slots per pole and phase of the flat wire motor is q
  • the voltage lead-out lines of p parallel branches of each phase winding are in s stator slots and in the same slot layer of different stator slots. Or adjacent slot layers, the neutral point lead-out lines of p parallel branches of each phase winding are in s stator slots and in different stator slots. of the same slot layer or adjacent slot layers.
  • the voltage lead-out line and the neutral point lead-out line are both located on the first slot layer or the n-th slot layer.
  • the welding pitch between the hairpin coils in each parallel branch is s/(2p).
  • n is an even number
  • the polarity distribution of each odd-numbered layer is the same, and the polarity distribution of each even-numbered layer is the same.
  • the polarity distribution is the same and is offset by one stator slot relative to the polarity distribution of the odd-numbered layers.
  • the number of slot layers of the stator slots is one of 4, 6, 8 and 10
  • the pitch combination of hairpin coils in each parallel branch is 10, 12, 14, and each parallel branch
  • the welding pitch between the hairpin coils in the branch is 13.
  • each of the hairpin coils includes a first leg, a second leg, a connecting section, a first bending section and a second bending section.
  • the first leg and the second leg are arranged in parallel and inserted respectively.
  • the connecting section is connected to one end of the first leg and the second leg
  • the first bending section is connected to the other end of the first leg
  • the second The bending section is connected to the other end of the second leg
  • the first bending section and the second bending section are both connected to welding ends.
  • the bending directions of the first bending section and the second bending section are identically parallel or arranged symmetrically.
  • the present invention provides a flat wire motor, including a rotor and a stator as described in any one of the above, wherein the rotor is disposed in a space surrounded by an inner wall of the stator core.
  • the present invention provides a power assembly, including a reducer and the flat wire motor as described above, and the flat wire motor is drivingly connected to the reducer.
  • the present invention provides a vehicle including the powertrain as described above.
  • this application discloses a stator, a flat wire motor, a power assembly and a vehicle.
  • the magnetic field distribution of the multiple parallel branches in each phase winding is the same and the potential is balanced, thus avoiding the circulation current generated between the parallel branches, thus greatly reducing the
  • the additional AC copper loss at small high frequencies improves the efficiency of the flat wire motor during high-speed operation, avoids local overtemperature of the winding, and extends the life of the flat wire motor; and the hairpin coils of each parallel branch are in different stator slots
  • the potential phase difference caused by multiple parallel branches in each phase winding due to their position in the stator slot can be eliminated, and by calculating the number of slot layers N in the stator slot and the corresponding position of each parallel branch in each
  • the total number of slot layers occupied in the stator slot is limited to reduce the linear type of the hairpin coil, thereby reducing the manufacturing
  • Figure 1 is a schematic structural diagram of an embodiment of a stator of a flat wire motor provided by this application;
  • FIG 2 is a schematic structural diagram of the stator core in the stator shown in Figure 1;
  • Figure 3 is a schematic circuit diagram of the parallel branch in each phase winding of the stator using star connection as shown in Figure 1;
  • Figure 4 is a schematic diagram of a circuit in which the parallel branches of each phase winding in the stator are connected in a delta manner as shown in Figure 1;
  • FIG. 5 is a schematic structural diagram of the hairpin coil in the stator shown in Figure 1;
  • Figure 6 is another structural schematic diagram of the hairpin coil in the stator shown in Figure 1;
  • Figure 7 is a schematic diagram of the slot layer structure of the stator slots in the stator core shown in Figure 2;
  • Figure 8 is a schematic diagram of the first winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 4;
  • Figure 9 is a second winding schematic diagram of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 4;
  • Figure 10 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 5;
  • Figure 11 is a schematic diagram of the first winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 6;
  • Figure 12 is a second winding schematic diagram of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 6;
  • Figure 13 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 7;
  • Figure 14 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 8;
  • Figure 15 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 9;
  • Figure 16 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 10;
  • Figure 17 shows the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 4, and a is 3.
  • Figure 18 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 17;
  • Figure 19 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 17;
  • Figure 20 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 6, and a is 3;
  • Figure 21 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 20;
  • Figure 22 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 20;
  • Figure 23 is a schematic winding diagram of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 8, and a is 3;
  • Figure 24 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 23;
  • Figure 25 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 23;
  • Figure 26 is a phase band distribution diagram when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 4, and a is 4;
  • Figure 27 is a schematic diagram of the winding of the first parallel branch of the U-phase winding in the flat wire motor shown in Figure 26;
  • Figure 28 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 26;
  • Figure 29 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 26;
  • Figure 30 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 6, and a is 4;
  • Figure 31 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 30;
  • Figure 32 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 30;
  • Figure 33 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 4, and a is 2;
  • Figure 34 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 33;
  • Figure 35 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 33;
  • Figure 36 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots, the number of slot layers is 6, and a is 2;
  • Figure 37 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor shown in Figure 36;
  • Figure 38 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 36.
  • first”, “second” and “third” in the embodiments of this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as “first”, “second”, and “third” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically limited.
  • the terms “including” and “having” and any variations thereof are intended to cover non-exclusive inclusion.
  • a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or units inherent to such processes, methods, products or devices.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • Stator refers to the stationary part of the motor, its function is to generate a rotating magnetic field.
  • Rotor refers to the rotating component in the motor, which is used to convert electrical energy into mechanical energy.
  • Pitch refers to the distance spanned by two elements of the same element in the motor winding on the armature surface. It is usually expressed by the number of stator slots opened on the stator core.
  • FIG. 1 is a schematic structural diagram of an embodiment of the stator of a flat wire motor provided by the present application.
  • Figure 2 is a schematic structural diagram of the stator core in the stator shown in Figure 1.
  • a flat wire motor is provided.
  • the flat wire motor includes a rotor and a stator.
  • the rotor is disposed in a space formed by the inner wall of the stator core of the stator.
  • Each pole and each phase of the flat wire motor are The number of slots can be 3, and the number of poles of the rotor can be an even number.
  • the slot-pole matching of the flat wire motor can be 6 poles with 54 slots, 8 poles with 72 slots, 10 poles with 90 slots, 12 poles with 108 slots, etc. This application does not specify this. limited.
  • the stator of the flat wire motor includes a stator core 10 and a stator winding 20 .
  • the inner wall of the stator core 10 is provided with a plurality of stator slots 11 evenly distributed along its circumferential direction.
  • the number of stator slots 11 is a multiple of 3.
  • the number of stator slots 11 can be 54 or 72.
  • the sub-slot 11 extends in the axial direction of the stator core 10 and penetrates the inner wall of the stator core 10 along the axial direction of the stator core 10 .
  • the stator slot 11 is also divided into N layers along the radial direction of the stator core 10 .
  • the stator winding 20 includes three-phase windings arranged periodically along the circumferential direction of the stator core 10 .
  • the three-phase windings are U-phase windings, V-phase windings and W-phase windings.
  • each phase winding includes multiple parallel branches (hereinafter referred to as p parallel branches), and the multiple parallel branches are rotationally symmetrical in the circumferential direction; for example, each phase winding includes three parallel branches, and the three parallel branches
  • the paths are rotationally symmetrical in the circumferential direction of the stator core 10, or each phase winding may also include two or four parallel branches.
  • the magnetic field distribution of the multiple parallel branches in each phase winding is the same and the electric potential is balanced, thereby avoiding the circulation current generated between the parallel branches, thereby greatly improving the efficiency of the parallel branches. It reduces the additional AC copper loss at high frequency, improves the efficiency of the flat wire motor during high-speed operation, avoids local overtemperature of the winding, and extends the life of the flat wire motor.
  • the stator is composed of three-phase windings with a phase difference of 120 electrical degrees and a stator core 10.
  • the structure of the stator winding 20 is in the stator core 10.
  • Each phase winding includes 3 parallel branches, and 3
  • the parallel branches use the central axis of the stator core 10 as the rotation axis, and the three parallel branches in the same-phase winding are rotationally symmetrical.
  • the central axis may also refer to the rotor centerline of the rotor in the flat wire motor. Rotational symmetry can be when a parallel branch in the same-phase winding moves a certain number of stator slots and coincides with other parallel branches in the same-phase winding.
  • Figure 5 is a schematic diagram of a circuit in which the parallel branches in each phase winding of the stator are connected in a star manner as shown in Figure 1. Each phase winding is composed of three parallel branches.
  • Figure 6 is a schematic diagram of a circuit in which the parallel branches in each phase winding of the stator are connected in a triangular manner as shown in Figure 1, where each phase winding is composed of three parallel branches.
  • Figure 3 is a schematic structural diagram of the hairpin coil in the stator shown in Figure 1.
  • Each parallel branch includes a plurality of hairpin coils 21 connected by connecting wires with different pitches.
  • Each stator slot 11 is provided with n layers of flat wire conductors of the hairpin coils 21 , n is a positive integer, that is, in the stator slot 11
  • Each slot layer is provided with flat wire conductors.
  • the hairpin coil 21 is formed by a flat wire conductor with a rectangular cross-section, and is inserted into the stator slot 11 .
  • Each hairpin coil 21 includes two parallel straight sections 211 and a connecting section 212 connecting the two straight sections 211.
  • the straight section 211 is inserted into the stator slot 11, and the connecting section 212 is arranged outside the stator slot 11.
  • the segment 212 can be U-shaped or V-shaped.
  • the pitch of the hairpin coils is the number of stator slots spanned by the two parallel linear segments 211 of the hairpin coils 21.
  • the welding pitch between the hairpin coils 21 is the number of adjacent hairpins.
  • the hairpin coil 21 also includes a bent section 213 connected to the straight section 211.
  • the bent section 213 is also arranged outside the stator slot 11 and is respectively arranged with the connecting section 212 on the end face of the stator core 10. Adjacent hairpins are in the same parallel branch. Adjacent bending sections 213 of the coil are connected and electrically connected through connecting wires.
  • the hairpin coil 21 can be inserted into the stator slot 11 and then the hairpin coil 21 can be bent to form a bent portion 223. After the hairpin coil 21 is inserted into the stator slot 11, its connecting section 212 The plug end of the stator winding 20 is formed, and the bent portion 223 forms the welding end of the stator winding 20 .
  • the bending direction of the hairpin coil can also be set to bend to one side.
  • the first bending section 214 and the second bending section 215 of part of the hairpin coil 21 are The bending directions are parallel and used for reversal winding; as shown in FIG. 3 , the bending directions of the first bending section 214 and the second bending section 215 of the remaining hairpin coils 21 are symmetrically arranged for in-phase winding.
  • N layers of hairpin coils 21 are provided in any stator slot 11, that is, each slot layer of the stator slot 11 is provided with two straight sections 211 of a hairpin coil 21.
  • the hairpin coils 21 of each parallel branch are in N slot layers are traversed in different stator slots 11, thereby eliminating potential phase differences caused by multiple parallel branches in each phase winding due to their positions in the stator slots; where N is a positive integer and greater than or equal to 4, for example, N can be 4, 5, 6, 7, 8, 9 or 10. For example, if N is 4, then each stator slot 11 is provided with four layers of straight segments 211 .
  • FIG 7 is a schematic diagram of the slot layer structure of the stator slot in the stator core as shown in Figure 2.
  • N is 6, and each stator slot 11 is provided with 6 layers of straight segments 211. That is, each stator slot 11 contains four layers of flat wire conductors, the first layer is marked as L1, the second layer is marked as L2, the third layer is marked as L3, the fourth layer is marked as L4, the fifth layer is marked as L5, and the third layer is marked as L3. Level 6 is recorded as L6.
  • the first slot layer is the slot bottom layer of the stator slot 11, and the sixth slot layer is the slot opening layer, or the first slot layer is the slot opening layer of the stator slot 11, and the sixth slot layer is the slot bottom layer.
  • the hairpin coils 21 in the same stator slot 11 are in the same phase, so there is no need for interphase insulation paper between different layers of linear segments 211 in the same stator slot 11 , which can reduce the insulation cost of the flat wire motor.
  • the total number of slot layers occupied by the path in each stator slot 11 is n, n-1, or n, n-1, n-2; where N is a positive integer and greater than or equal to 4, and each parallel branch is in each stator slot 11.
  • the total number of slot levels in sub-slot 11 is also Positive integer.
  • the total number of slot layers occupied by each parallel branch in each stator slot 11 can be 2 and 1;
  • the combination of the total number of slot layers occupied by each parallel branch in each stator slot 11 can be 2 or 2 or 1; when the number N of slot layers in the stator slot 11 is 7, then each parallel branch
  • the combination of the total number of slot layers occupied by the road in each stator slot 11 may be 3, 2 or 3, 2, 1.
  • each parallel branch occupies a When the total number of slot layers is 2, the two slot layers are arranged adjacently in the stator slot 11, or the two slot layers are the first layer and the Nth layer in the stator slot 11 respectively; each parallel branch is located in the stator slot 11.
  • the total number of slot layers occupied in the slot 11 is 3, two of the three slot layers are arranged adjacently, and the remaining one slot layer is located at the first or Nth layer of the stator slot 11 and is connected to the other two slot layers.
  • Each slot layer is separated by four slot layers; when the total number of slot layers occupied by each parallel branch in the stator slot 11 is 4, the 4 slot layers are divided into two groups, each group is separated by four slot layers, and each group includes phases. Two slot layers are set adjacent to each other.
  • the pitch combinations of the hairpin coils 21 in each parallel branch are 8, 9, 11, 12, and 16. In another embodiment, the pitch of the hairpin coils 21 of each parallel branch in the same slot layer is 9. In yet another embodiment, the pitch of the hairpin coil 21 of each parallel branch in the first slot layer or the Nth slot layer is 8 or 8 or 11. The pitch of the hairpin coil 21 is the number of stator slots spanned by the two straight sections 211 in the hairpin coil 21 .
  • the welding pitch between the hairpin coils 21 in each parallel branch can be 9 or 11, that is, the stator slot spanned by two adjacent straight sections 211 of two adjacent hairpin coils 21 in the same parallel branch.
  • the numbers are all 9 or 11.
  • the incoming line end of each parallel branch is at the Nth slot layer of the stator slot 11, and the outlet end is at the N-1th slot layer of the stator slot 11; or the incoming line of each parallel branch
  • the terminal and the outlet terminal are both at the first slot layer and the Nth slot layer of the stator slot 11 to facilitate the introduction of the incoming terminal and the outlet terminal of the parallel branch.
  • connection method of the parallel branches in this application will be described in detail below based on specific application scenarios.
  • the number of stator slots 11 in the stator core 10 is 54
  • the number of rotor poles is 6, and the number of slots per pole per phase is 3.
  • the number N of slot layers in each stator slot 11 is 4.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 3.
  • Figure 8 is a schematic diagram of the first winding of the U-phase winding of a 6-pole, 54-slot flat wire motor provided by this application and the number of slot layers is 4.
  • Figure 9 is a schematic diagram of the 6-pole, 54-slot flat wire motor provided by this application.
  • the second winding diagram of the U-phase winding when the number of slot layers is 4.
  • the solid line represents the wiring method of the plug-in terminal
  • the dotted line represents the wiring method of the welding terminal.
  • U1, U2, and U3 can be used as voltage lead wires or neutral point lead wires.
  • X1, X2, and X3 can be used as voltage lead wires or as neutral point lead wires. Neutral point lead-out.
  • the first parallel branch, the second parallel branch and the third parallel branch in the U-phase winding in this embodiment will be described in detail below with reference to FIGS. 8 and 9 .
  • i(j) represents the j-th groove layer in the i-th groove, for example, 1(1) represents the first groove layer of the first groove, and 10(2) represents the second groove layer of the 10th groove.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 10(2) ⁇ 21(1) ⁇ 30(2 ) ⁇ 38(1) ⁇ 47(2) ⁇ 2(3) ⁇ 11(4) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 2(4) ⁇ 47(3 ) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46(1) ⁇ 38(2) ⁇ 29(1) ⁇ 21(2) ⁇ 12(1 ).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2) ⁇ 3( 3) ⁇ 12(4) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 3(4) ⁇ 48(3) ⁇ 37(4) ⁇ 28(3) ⁇ 20( 4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39(2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2) ⁇ 1( 3) ⁇ 10(4) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 1(4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21( 4) ⁇ 12(3) ⁇ 3(2) ⁇ 48(1) ⁇ 37(2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1).
  • the first parallel branch of the U-phase winding is connected in series through
  • the slot number is: 1(1) ⁇ 10(2) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 2(3) ⁇ 11(4) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46(1) ⁇ 38(2) ⁇ 29(1) ⁇ 21(2) ⁇ 12(1) ⁇ 21(1) ⁇ 30(2) ⁇ 38(1) ⁇ 47(2).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 3( 3) ⁇ 12(4) ⁇ 3(4) ⁇ 48(3) ⁇ 37(4) ⁇ 28(3) ⁇ 20(4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39( 2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 1( 3) ⁇ 10(4) ⁇ 1(4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21(4) ⁇ 12(3) ⁇ 3(2) ⁇ 48(1) ⁇ 37( 2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2).
  • the U-phase winding, V-phase winding and W-phase winding are symmetrically and evenly distributed on the circumference of the stator core 10, and the winding methods of the V-phase winding and W-phase winding will not be described in detail here.
  • the number of stator slots 11 in the stator core 10 is 54
  • the number of rotor poles is 6, and the number of slots per pole per phase is 3.
  • the number N of slot layers in each stator slot 11 is 5.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 3.
  • Figure 10 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 5.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 10(2) ⁇ 21(1) ⁇ 30(2) ⁇ 38(1) ⁇ 47 (2) ⁇ 2(3) ⁇ 11(4) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 3(5) ⁇ 48(5) ⁇ 37(5) ⁇ 28 (5) ⁇ 20(5) ⁇ 11(5) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46 (1) ⁇ 38(2) ⁇ 29(1) ⁇ 21(2) ⁇ 12(1).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2) ⁇ 3( 3) ⁇ 12(4) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 1(5) ⁇ 46(5) ⁇ 38(5) ⁇ 29(5) ⁇ 21( 5) ⁇ 12(5) ⁇ 3(4) ⁇ 48(3) ⁇ 37(4) ⁇ 28(3) ⁇ 20(4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39( 2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 20 (1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2) ⁇ 1(3) ⁇ 10(4) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 2 (5) ⁇ 47(5) ⁇ 39(5) ⁇ 30(5) ⁇ 19(5) ⁇ 10(5) ⁇ 1(4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21 (4) ⁇ 12(3) ⁇ 3(2) ⁇ 48(1) ⁇ 37(2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1).
  • the number of stator slots 11 in the stator core 10 is 54
  • the number of rotor poles is 6, and the number of slots per pole per phase is 3.
  • the number N of slot layers in each stator slot 11 is 6.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 3.
  • Figure 11 is a schematic diagram of the first winding of the U-phase winding of a 6-pole, 54-slot flat wire motor provided by this application and the number of slot layers is 6.
  • Figure 12 is a schematic diagram of the 6-pole, 54-slot 6-pole, 54-slot motor provided by this application. Schematic diagram of the second winding of the U-phase winding for a flat wire motor and the number of slot layers is 6.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 10(2) ⁇ 21(1) ⁇ 30(2 ) ⁇ 38(1) ⁇ 47(2) ⁇ 2(3) ⁇ 11(4) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 3(5) ⁇ 12(6 ) ⁇ 20(5) ⁇ 29(6) ⁇ 37(5) ⁇ 46(6) ⁇ 3(6) ⁇ 48(5) ⁇ 37(6) ⁇ 28(5) ⁇ 20(6) ⁇ 11(5 ) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46(1) ⁇ 38(2) ⁇ 29(1 ) ⁇ 21(2) ⁇ 12(1).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2) ⁇ 3( 3) ⁇ 12(4) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 1(5) ⁇ 10(6) ⁇ 21(5) ⁇ 30(6) ⁇ 38( 5) ⁇ 47(6) ⁇ 1(6) ⁇ 46(5) ⁇ 38(6) ⁇ 29(5) ⁇ 21(6) ⁇ 12(5) ⁇ 3(4) ⁇ 48(3) ⁇ 37( 4) ⁇ 28(3) ⁇ 20(4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39(2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2) ⁇ 1( 3) ⁇ 10(4) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 2(5) ⁇ 11(6) ⁇ 19(5) ⁇ 28(6) ⁇ 39( 5) ⁇ 48(6) ⁇ 2(6) ⁇ 47(5) ⁇ 39(6) ⁇ 30(5) ⁇ 19(6) ⁇ 10(5) ⁇ 1(4) ⁇ 46(3) ⁇ 38( 4) ⁇ 29(3) ⁇ 21(4) ⁇ 12(3) ⁇ 3(2) ⁇ 48(1) ⁇ 37(2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1).
  • the first parallel branch of the U-phase winding is connected in series through
  • the slot number is: 1(1) ⁇ 10(2) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 2(3) ⁇ 11(4) ⁇ 20(5) ⁇ 29(6) ⁇ 37(5) ⁇ 46(6) ⁇ 3(5) ⁇ 12(6) ⁇ 3(6) ⁇ 48(5) ⁇ 37(6) ⁇ 28(5) ⁇ 20(6) ⁇ 11(5) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46(1) ⁇ 38(2) ⁇ 29(1) ⁇ 21(2) ⁇ 12(1) ⁇ 21(1) ⁇ 30(2) ⁇ 38(1) ⁇ 47(2).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 3( 3) ⁇ 12(4) ⁇ 21(5) ⁇ 30(6) ⁇ 38(5) ⁇ 47(6) ⁇ 1(5) ⁇ 10(6) ⁇ 1(6) ⁇ 46(5) ⁇ 38( 6) ⁇ 29(5) ⁇ 21(6) ⁇ 12(5) ⁇ 3(4) ⁇ 48(3) ⁇ 37(4) ⁇ 28(3) ⁇ 20(4) ⁇ 11(3) ⁇ 2( 2) ⁇ 47(1) ⁇ 39(2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 1( 3) ⁇ 10(4) ⁇ 19(5) ⁇ 28(6) ⁇ 39(5) ⁇ 48(6) ⁇ 2(5) ⁇ 11(6) ⁇ 2(6) ⁇ 47(5) ⁇ 39( 6) ⁇ 30(5) ⁇ 19(6) ⁇ 10(5) ⁇ 1(4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21(4) ⁇ 12(3) ⁇ 3( 2) ⁇ 48(1) ⁇ 37(2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2).
  • the number of stator slots 11 in the stator core 10 is 54
  • the number of rotor poles is 6, and the number of slots per pole per phase is 3.
  • the number N of slot layers in each stator slot 11 is 7.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 3.
  • Figure 13 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 7.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 10(2) ⁇ 21(1) ⁇ 30(2) ⁇ 38(1) ⁇ 47 (2) ⁇ 2(3) ⁇ 11(4) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 3(5) ⁇ 12(6) ⁇ 20(5) ⁇ 29 (6) ⁇ 37(5) ⁇ 46(6) ⁇ 1(7) ⁇ 46(7) ⁇ 38(7) ⁇ 29(7) ⁇ 21(7) ⁇ 12(7) ⁇ 3(6) ⁇ 48 (5) ⁇ 37(6) ⁇ 28(5) ⁇ 20(6) ⁇ 11(5) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10 (3) ⁇ 1(2) ⁇ 46(1) ⁇ 38(2) ⁇ 29(1) ⁇ 21(2) ⁇ 12(1).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 19 (1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2) ⁇ 3(3) ⁇ 12(4) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 1 (5) ⁇ 10(6) ⁇ 21(5) ⁇ 30(6) ⁇ 38(5) ⁇ 47(6) ⁇ 2(7) ⁇ 47(7) ⁇ 39(7) ⁇ 39(7) ⁇ 30 (7) ⁇ 19(7) ⁇ 10(7) ⁇ 1(6) ⁇ 46(5) ⁇ 38(6) ⁇ 29(5) ⁇ 21(6) ⁇ 12(5) ⁇ 3(4) ⁇ 48 (3) ⁇ 37(4) ⁇ 28(3) ⁇ 20(4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39(2) ⁇ 30(1) ⁇ 19(2) ⁇ 10 (1).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2) ⁇ 1( 3) ⁇ 10(4) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 2(5) ⁇ 11(6) ⁇ 19(5) ⁇ 28(6) ⁇ 39( 5) ⁇ 48(6) ⁇ 3(7) ⁇ 48(7) ⁇ 37(7) ⁇ 28(7) ⁇ 20(7) ⁇ 11(7) ⁇ 2(6) ⁇ 47(5) ⁇ 39( 6) ⁇ 30(5) ⁇ 19(6) ⁇ 10(5) ⁇ 1(4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21(4) ⁇ 12(3) ⁇ 3( 2) ⁇ 48(1) ⁇ 37(2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1).
  • the number of stator slots 11 in the stator core 10 is 54
  • the number of rotor poles is 6, and the number of slots per pole per phase is 3.
  • the number N of slot layers in each stator slot 11 is 8.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 3.
  • Figure 14 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 8.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 10(2) ⁇ 21(1) ⁇ 30(2) ⁇ 38(1) ⁇ 47 (2) ⁇ 2(3) ⁇ 11(4) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 3(5) ⁇ 12(6) ⁇ 20(5) ⁇ 29 (6) ⁇ 37(5) ⁇ 46(6) ⁇ 1(7) ⁇ 10(8) ⁇ 21(7) ⁇ 30(8) ⁇ 38(7) ⁇ 47(8) ⁇ 1(8) ⁇ 46 (7) ⁇ 38(8) ⁇ 29(7) ⁇ 21(8) ⁇ 12(7) ⁇ 3(6) ⁇ 48(5) ⁇ 37(6) ⁇ 28(5) ⁇ 20(6) ⁇ 11 (5) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46(1) ⁇ 38(2) ⁇ 29 (1) ⁇ 21(2) ⁇ 12(1).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2) ⁇ 3( 3) ⁇ 12(4) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 1(5) ⁇ 10(6) ⁇ 21(5) ⁇ 30(6) ⁇ 38( 5) ⁇ 47(6) ⁇ 2(7) ⁇ 11(8) ⁇ 19(7) ⁇ 28(8) ⁇ 39(7) ⁇ 48(8) ⁇ 2(8) ⁇ 47(7) ⁇ 39( 8) ⁇ 30(7) ⁇ 19(8) ⁇ 10(7) ⁇ 1(6) ⁇ 46(5) ⁇ 38(6) ⁇ 29(5) ⁇ 21(6) ⁇ 12(5) ⁇ 3(4) ⁇ 48(3) ⁇ 37(4) ⁇ 28(3) ⁇ 20(4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39(2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2) ⁇ 1( 3) ⁇ 10(4) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 2(5) ⁇ 11(6) ⁇ 19(5) ⁇ 28(6) ⁇ 39( 5) ⁇ 48(6) ⁇ 3(7) ⁇ 12(8) ⁇ 20(7) ⁇ 29(8) ⁇ 37(7) ⁇ 46(8) ⁇ 3(8) ⁇ 48(7) ⁇ 37( 8) ⁇ 28(7) ⁇ 20(8) ⁇ 11(7) ⁇ 2(6) ⁇ 47(5) ⁇ 39(6) ⁇ 30(5) ⁇ 19(6) ⁇ 10(5) ⁇ 1( 4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21(4) ⁇ 12(3) ⁇ 3(2) ⁇ 48(1) ⁇ 37(2) ⁇ 28(1) ⁇ 20( 2) ⁇ 11(1).
  • the number of stator slots 11 in the stator core 10 is 54
  • the number of rotor poles is 6, and the number of slots per pole per phase is 3.
  • the number N of slot layers in each stator slot 11 is 9.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 3.
  • Figure 15 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 9.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 10(2) ⁇ 21(1) ⁇ 30(2) ⁇ 38(1) ⁇ 47 (2) ⁇ 2(3) ⁇ 11(4) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 3(5) ⁇ 12(6) ⁇ 20(5) ⁇ 29 (6) ⁇ 37(5) ⁇ 46(6) ⁇ 1(7) ⁇ 10(8) ⁇ 21(7) ⁇ 30(8) ⁇ 38(7) ⁇ 47(8) ⁇ 2(9) ⁇ 47 (9) ⁇ 39(9) ⁇ 30(9) ⁇ 19(9) ⁇ 10(9) ⁇ 1(8) ⁇ 46(7) ⁇ 38(8) ⁇ 29(7) ⁇ 21(8) ⁇ 12 (7) ⁇ 3(6) ⁇ 48(5) ⁇ 37(6) ⁇ 28(5) ⁇ 20(6) ⁇ 11(5) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30 (3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46(1) ⁇ 38(2) ⁇ 29(1) ⁇ 21(2) ⁇ 12(1).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2) ⁇ 3( 3) ⁇ 12(4) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 1(5) ⁇ 10(6) ⁇ 21(5) ⁇ 30(6) ⁇ 38( 5) ⁇ 47(6) ⁇ 2(7) ⁇ 11(8) ⁇ 19(7) ⁇ 26(8) ⁇ 39(7) ⁇ 48(8) ⁇ 3(9) ⁇ 46(9) ⁇ 37( 9) ⁇ 28(9) ⁇ 20(9) ⁇ 11(9) ⁇ 2(8) ⁇ 47(7) ⁇ 39(8) ⁇ 30(7) ⁇ 19(8) ⁇ 10(7) ⁇ 1( 6) ⁇ 46(5) ⁇ 38(6) ⁇ 29(5) ⁇ 21(6) ⁇ 12(5) ⁇ 3(4) ⁇ 48(3) ⁇ 37(4) ⁇ 28(3) ⁇ 20( 4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39(2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2) ⁇ 1( 3) ⁇ 10(4) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 2(5) ⁇ 11(6) ⁇ 19(5) ⁇ 28(6) ⁇ 39( 5) ⁇ 48(6) ⁇ 3(7) ⁇ 12(8) ⁇ 20(7) ⁇ 29(8) ⁇ 37(7) ⁇ 46(8) ⁇ 1(9) ⁇ 46(9) ⁇ 38( 9) ⁇ 29(9) ⁇ 21(9) ⁇ 12(9) ⁇ 3(8) ⁇ 48(7) ⁇ 37(8) ⁇ 28(7) ⁇ 20(8) ⁇ 11(7) ⁇ 2( 6) ⁇ 47(5) ⁇ 39(6) ⁇ 30(5) ⁇ 19(6) ⁇ 10(5) ⁇ 1(4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21( 4) ⁇ 12(3) ⁇ 3(2) ⁇ 48(1) ⁇ 37(2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1).
  • the number of stator slots 11 in the stator core 10 is 54, the number of rotor poles is 6, and the number of slots per pole per phase is 3.
  • the number N of slot layers in each stator slot 11 is 10.
  • the stator winding is divided into U phase, V phase and W phase, and the number of parallel branches provided for each phase winding is 3.
  • Figure 16 is a schematic diagram of the winding of the U-phase winding of the 6-pole 54-slot flat wire motor provided by this application and the number of slot layers is 10.
  • the slot number through which the first parallel branch of the U-phase winding is connected in series is: 1(1) ⁇ 10(2) ⁇ 21(1) ⁇ 30(2) ⁇ 38(1) ⁇ 47 (2) ⁇ 2(3) ⁇ 11(4) ⁇ 19(3) ⁇ 28(4) ⁇ 39(3) ⁇ 48(4) ⁇ 3(5) ⁇ 12(6) ⁇ 20(5) ⁇ 29 (6) ⁇ 37(5) ⁇ 46(6) ⁇ 1(7) ⁇ 10(8) ⁇ 21(7) ⁇ 30(8) ⁇ 38(7) ⁇ 47(8) ⁇ 2(9) ⁇ 11 (10) ⁇ 19(9) ⁇ 28(10) ⁇ 39(9) ⁇ 48(10) ⁇ 2(10) ⁇ 47(9) ⁇ 39(10) ⁇ 30(9) ⁇ 19(10) ⁇ 10 (9) ⁇ 1(8) ⁇ 46(7) ⁇ 38(8) ⁇ 29(7) ⁇ 21(8) ⁇ 12(7) ⁇ 3(6) ⁇ 48(5) ⁇ 37(6) ⁇ 28 (5) ⁇ 20(6) ⁇ 11(5) ⁇ 2(4) ⁇ 47(3) ⁇ 39(4) ⁇ 30(3) ⁇ 19(4) ⁇ 10(3) ⁇ 1(2) ⁇ 46 (1) ⁇ 38(2) ⁇ 28(1) ⁇ 21(2) ⁇ 12(1).
  • the slot number through which the second parallel branch of the U-phase winding is connected in series is: 2(1) ⁇ 11(2) ⁇ 19(1) ⁇ 28(2) ⁇ 39(1) ⁇ 48(2) ⁇ 3( 3) ⁇ 12(4) ⁇ 20(3) ⁇ 29(4) ⁇ 37(3) ⁇ 46(4) ⁇ 1(5) ⁇ 10(6) ⁇ 21(5) ⁇ 30(6) ⁇ 38( 5) ⁇ 47(6) ⁇ 2(7) ⁇ 11(8) ⁇ 19(7) ⁇ 26(8) ⁇ 39(7) ⁇ 48(8) ⁇ 3(9) ⁇ 12(10) ⁇ 20( 9) ⁇ 29(10) ⁇ 37(9) ⁇ 46(10) ⁇ 3(10) ⁇ 48(9) ⁇ 37(10) ⁇ 28(9) ⁇ 20(10) ⁇ 11(9) ⁇ 2( 8) ⁇ 47(7) ⁇ 39(8) ⁇ 30(7) ⁇ 19(8) ⁇ 10(7) ⁇ 1(6) ⁇ 46(5) ⁇ 38(6) ⁇ 29(5) ⁇ 21( 6) ⁇ 12(5) ⁇ 3(4) ⁇ 48(3) ⁇ 37(4) ⁇ 28(3) ⁇ 20(4) ⁇ 11(3) ⁇ 2(2) ⁇ 47(1) ⁇ 39( 2) ⁇ 30(1) ⁇ 19(2) ⁇ 10(1).
  • the slot number through which the third parallel branch of the U-phase winding is connected in series is: 3(1) ⁇ 12(2) ⁇ 20(1) ⁇ 29(2) ⁇ 37(1) ⁇ 46(2) ⁇ 1( 3) ⁇ 10(4) ⁇ 21(3) ⁇ 30(4) ⁇ 38(3) ⁇ 47(4) ⁇ 2(5) ⁇ 11(6) ⁇ 19(5) ⁇ 28(6) ⁇ 39( 5) ⁇ 48(6) ⁇ 3(7) ⁇ 12(8) ⁇ 20(7) ⁇ 29(8) ⁇ 37(7) ⁇ 46(8) ⁇ 1(9) ⁇ 10(10) ⁇ 21( 9) ⁇ 30(10) ⁇ 36(9) ⁇ 47(10) ⁇ 1(10) ⁇ 46(9) ⁇ 38(10) ⁇ 29(9) ⁇ 21(10) ⁇ 12(9) ⁇ 3( 8) ⁇ 48(7) ⁇ 37(8) ⁇ 28(7) ⁇ 20(8) ⁇ 11(7) ⁇ 2(6) ⁇ 47(5) ⁇ 39(6) ⁇ 30(5) ⁇ 19( 6) ⁇ 10(5) ⁇ 1(4) ⁇ 46(3) ⁇ 38(4) ⁇ 29(3) ⁇ 21(4) ⁇ 12(3) ⁇ 3(2) ⁇ 48(1) ⁇ 37( 2) ⁇ 28(1) ⁇ 20(2) ⁇ 11(1).
  • the multiple hairpin coils 21 of each parallel branch of the present application include long-distance hairpin coils with a pitch of s/(2p)+a, and integral hairpin coils with a pitch of s/(2p).
  • the hairpin coil and the short distance hairpin coil with a pitch of s/(2p)+a-4, a is an integer greater than or equal to 2 and less than or equal to 4.
  • first leg 211 and the second leg 212 of the short-distance hairpin coil are located at the kth slot layer and the k+1th slot layer respectively, and the first leg 211 and the second leg 212 of the long-distance hairpin coil are respectively located at the kth slot layer and k+1th slot layer.
  • first leg 211 and the second leg 212 of the hairpin coil are distributed in the 1st slot layer or the nth slot layer; where k is greater than or equal to 1 and less than is an odd number equal to n.
  • the voltage leads of the p parallel branches of each phase winding are in s stator slots and in the same slot layer or adjacent slot layers of different stator slots.
  • the neutral point leads of the p parallel branches of each phase winding are in In s stator slots and in the same slot layer or adjacent slot layers of different stator slots, to simplify the winding structure.
  • All lead wires and neutral points of the three-phase windings are concentrated in the same slot layer or adjacent slot layers of different stator slots 11.
  • the axial direction of the winding can be reduced. and radial space to reduce the manufacturing difficulty of flat wire motors.
  • the voltage leads of the p parallel branches in the same phase winding are also rotationally symmetrical in the circumferential direction of the stator core 10.
  • the same phase winding The neutral point lead wires of the p parallel branches are also rotationally symmetrical around the circumference of the stator core 10. Further, the voltage lead wires and the neutral point lead wires are in the same slot layer, for example, the voltage lead wire and the neutral point lead wire are The point lead-out lines are all located on the 1st slot layer or the nth slot layer.
  • the voltage leads and neutral points of the p parallel branches are rotationally symmetrical along the circumferential direction of the stator core 10, which can avoid the generation of circulating current.
  • the welding pitch between hairpin coils 21 in each parallel branch can be s/(2p), That is, the welding pitch between the hairpin coils 21 is the same as the pitch of the full-pitch hairpin coils. In one embodiment, the welding pitch between the hairpin coils 21 in the parallel branch may not be equal to the pitch of the full-pitch hairpin coils.
  • a 3 then the pitch of the long-distance hairpin coil is s/(2p)+3, the pitch of the full-distance hairpin coil is s/(2p), and the pitch of the short-distance hairpin coil is s /(2p)-1.
  • the hairpin coils of the three pitches exist simultaneously in each parallel branch, and the hairpin coils of each parallel branch traverse n slot layers in different stator slots 11, so that p parallel branches can eliminate the problem of slot layers. The potential phase difference caused by the difference in position.
  • the pitch of the short-distance hairpin coil can be 11
  • the pitch of the full-distance hairpin coil can be 12
  • the pitch of the long-distance hairpin coil can be 15.
  • the hairpin coil used in the parallel branch between the 1st slot layer and the 2nd slot layer is a short distance hairpin coil
  • the parallel branch is between the 2nd slot layer and the 3rd slot layer.
  • the hairpin coil used between the 3rd slot layer and the 4th slot layer is a short-distance hairpin coil.
  • the hairpin coil used in the parallel branch between the 3rd slot layer and the 4th slot layer is a short-distance hairpin coil.
  • the parallel branch is in the 4th slot.
  • the hairpin coil used between the first layer and the fifth slot layer is a long-distance hairpin coil, which will not be described again; when the full-distance hairpin coil appears in the same slot layer, it only appears in the first slot layer or the nth slot layer.
  • the winding method of each phase winding can be wave winding or stack winding.
  • Figure 17 is a schematic diagram of the winding of the first parallel branch of the U-phase winding when the flat wire motor provided by this application has 6 poles and 72 slots and the number of slot layers is 4 and a is 3.
  • Figure 18 is as follows
  • Figure 17 is a schematic diagram of the winding of the second parallel branch of the U-phase winding in the flat wire motor.
  • Figure 19 is a schematic diagram of the winding of the third parallel branch of the U-phase winding in the flat wire motor shown in Figure 17.
  • the solid line represents the wiring method of the plug-in terminal
  • the dotted line represents the wiring method of the welding terminal.
  • U1, U2, and U3 can be used as voltage lead wires or neutral point lead wires.
  • X1, X2, and X3 can be used as voltage lead wires or as neutral point lead wires. Neutral point lead-out.
  • n 4
  • the pitch of the hairpin coil is 15, the pitch of the full-pitch hairpin coil is 12, the pitch of the short-pitch hairpin coil is 11, the welding pitch between adjacent hairpin coils in the parallel branch is 12, then the parallel branch is at
  • the hairpin coil used between the 1st slot layer and the 2nd slot layer is a short distance hairpin coil, and the hairpin coil used in the parallel branch between the 2nd slot layer and the 3rd slot layer is a long distance hairpin coil.
  • the hairpin coil used between the 3rd slot layer and the 4th slot layer is a short distance hairpin coil.
  • the full distance hairpin coil appears in the same slot layer, and it only appears in the 1st slot layer or the 4th slot layer. Therefore, Only five types of hairpin coils 21 are needed to adopt the stator winding 20 of this embodiment.
  • the stator winding 20 of this embodiment is composed of a three-phase winding structure with a phase difference of 120 electrical degrees.
  • the number i(j) represents the j-th groove layer in the i-th groove.
  • 1(1) represents the first groove layer of the first groove
  • 7(2) represents the second groove layer of the seventh groove.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 13(2) ⁇ 24(1) ⁇ 36(2) ⁇ 47(1) ⁇ 59(2) ⁇ 70(1) ⁇ 10(2) ⁇ 25(3) ⁇ 37(4) ⁇ 48(3 ) ⁇ 60(4) ⁇ 71(3) ⁇ 11(4) ⁇ 22(3) ⁇ 34(4) ⁇ 22(4) ⁇ 10(3) ⁇ 71(4) ⁇ 59(3) ⁇ 48(4 ) ⁇ 36(3) ⁇ 25(4) ⁇ 13(3) ⁇ 70(2) ⁇ 58(1) ⁇ 47(2) ⁇ 35(1) ⁇ 24(2) ⁇ 12(1) ⁇ 1(2 ) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number through which the second parallel branch is connected in series is: 71(1 ) ⁇ 11(2) ⁇ 22(1) ⁇ 34(2) ⁇ 49(3) ⁇ 61(4) ⁇ 72(3) ⁇ 12(4) ⁇ 23(3) ⁇ 35(4) ⁇ 46(3 ) ⁇ 58(4) ⁇ 46(4) ⁇ 34(3) ⁇ 23(4) ⁇ 11(3) ⁇ 72(4) ⁇ 60(3) ⁇ 49(4) ⁇ 37(3) ⁇ 22(2 ) ⁇ 10(1) ⁇ 71(2) ⁇ 59(1) ⁇ 48(2) ⁇ 36(1) ⁇ 25(2) ⁇ 13(1) ⁇ 25(1) ⁇ 37(2) ⁇ 48(1 ) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 72 (1 ) ⁇ 12(2) ⁇ 23(1) ⁇ 35(2) ⁇ 46(1) ⁇ 58(2) ⁇ 1(3) ⁇ 13(4) ⁇ 24(3) ⁇ 36(4) ⁇ 47(3 ) ⁇ 59(4) ⁇ 70(3) ⁇ 10(4) ⁇ 70(4) ⁇ 58(3) ⁇ 47(4) ⁇ 35(3) ⁇ 24(4) ⁇ 12(3) ⁇ 1(4 ) ⁇ 61(3) ⁇ 46(2) ⁇ 34(1) ⁇ 23(2) ⁇ 11(1) ⁇ 72(2) ⁇ 60(1) ⁇ 49(2) ⁇ 37(1) ⁇ 49(1 ) ⁇ 61(2).
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 71(1), and X2 corresponds to 60(2); U3 corresponds to 72(1), and X3 corresponds to 61(2). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • the U-phase winding, V-phase winding and W-phase winding are symmetrically and evenly distributed on the circumference of the stator core 10.
  • the V-phase winding and the W-phase winding can be rotated along the circumferential direction of the stator core 10 by the U-phase winding.
  • a plurality of stator slots 11 are obtained, and the winding method of the V-phase winding and the W-phase winding will not be described again here.
  • the pitch from the hairpin coil is 12, the pitch of the short hairpin coil is 11, and the welding pitch between adjacent hairpin coils in the parallel branch is 12, then the parallel branch is at the 1st slot layer and the 2nd slot layer
  • the hairpin coil used between the 2nd slot layer and the 3rd slot layer is a long-distance hairpin coil
  • the parallel branch between the 3rd slot layer and the 4th slot layer is a long-distance hairpin coil.
  • the hairpin coil used between the slot layers is a short-distance hairpin coil.
  • the hairpin coil used in the parallel branch between the 4th slot layer and the 5th slot layer is a long-distance hairpin coil.
  • the parallel branch is between the 5th slot layer and the 5th slot layer.
  • the hairpin coils used between the 6th slot layer are short-distance hairpin coils.
  • the full-distance hairpin coils appear in the same slot layer. They only appear in the 1st slot layer or the 6th slot layer. Therefore, the stator winding of this embodiment is used. 20 Only seven types of hairpin coils 21 are needed.
  • the stator winding 20 of this embodiment is composed of a three-phase winding structure with a phase difference of 120 electrical degrees.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 13(2) ⁇ 24(1) ⁇ 36(2) ⁇ 47(1) ⁇ 59(2) ⁇ 70(1) ⁇ 10(2) ⁇ 25(3) ⁇ 37(4) ⁇ 48(3 ) ⁇ 60(4) ⁇ 71(3) ⁇ 11(4) ⁇ 22(3) ⁇ 34(4) ⁇ 49(5) ⁇ 61(6) ⁇ 72(5) ⁇ 12(6) ⁇ 23(5 ) ⁇ 35(6) ⁇ 46(5) ⁇ 58(6) ⁇ 46(6) ⁇ 34(5) ⁇ 23(6) ⁇ 11(5) ⁇ 72(6) ⁇ 60(5) ⁇ 49(6 ) ⁇ 37(5) ⁇ 22(4) ⁇ 10(3) ⁇ 71(4) ⁇ 59(3) ⁇ 48(4) ⁇ 36(3) ⁇ 25(4) ⁇ 13(3) ⁇ 70(2 ) ⁇ 58(1) ⁇ 47(2) ⁇ 35(1) ⁇ 24(2) ⁇ 12(1) ⁇ 1(2) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71 (1 ) ⁇ 11(2) ⁇ 22(1) ⁇ 34(2) ⁇ 49(3) ⁇ 61(4) ⁇ 72(3) ⁇ 12(4) ⁇ 23(3) ⁇ 35(4) ⁇ 46(3 ) ⁇ 58(4) ⁇ 1(5) ⁇ 13(6) ⁇ 24(5) ⁇ 36(6) ⁇ 47(5) ⁇ 59(6) ⁇ 70(5) ⁇ 10(6) ⁇ 70(6 ) ⁇ 58(5) ⁇ 47(6) ⁇ 35(5) ⁇ 24(6) ⁇ 12(5) ⁇ 1(6) ⁇ 61(5) ⁇ 46(4) ⁇ 34(3) ⁇ 23(4 ) ⁇ 11(3) ⁇ 72(4) ⁇ 60(3) ⁇ 49(4) ⁇ 37(3) ⁇ 22(2) ⁇ 10(1) ⁇ 71(2) ⁇ 59(1) ⁇ 36(1 ) ⁇ 25(2) ⁇ 13(1) ⁇ 25(1) ⁇ 37(2) ⁇ 48(1) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: (1) ⁇ 12(2) ⁇ 23(1) ⁇ 35(2) ⁇ 46(1) ⁇ 58(2) ⁇ 1(3) ⁇ 13(4) ⁇ 24(3) ⁇ 36(4) ⁇ 47(3) ⁇ 59(4) ⁇ 70(3) ⁇ 10(4) ⁇ 25(5) ⁇ 37(6) ⁇ 48(5) ⁇ 60(6) ⁇ 71(5) ⁇ 11(6) ⁇ 22(5) ⁇ 34(6) ⁇ 22(6) ⁇ 10(5) ⁇ 71(6) ⁇ 59(5) ⁇ 48(6) ⁇ 36(5) ⁇ 25(6) ⁇ 13(5) ⁇ 70(4) ⁇ 58(3) ⁇ 47(4) ⁇ 35(3) ⁇ 24(4) ⁇ 12(3) ⁇ 1(4) ⁇ 61(3) ⁇ 46(2) ⁇ 34(1) ⁇ 23(2) ⁇ 11(1) ⁇ 72(2) ⁇ 60(1) ⁇ 49(2) ⁇ 37(1) ⁇ 49(1) ⁇ 61(2).
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 71(1), and X2 corresponds to 60(2); U3 corresponds to 72(1), and X3 corresponds to 61(2). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 13(2) ⁇ 24(1) ⁇ 36(2) ⁇ 47(1) ⁇ 59(2) ⁇ 70(1) ⁇ 10(2) ⁇ 25(3) ⁇ 37(4) ⁇ 48(3 ) ⁇ 60(4) ⁇ 71(3) ⁇ 11(4) ⁇ 22(3) ⁇ 34(4) ⁇ 49(5) ⁇ 61(6) ⁇ 72(5) ⁇ 12(6) ⁇ 23(5 ) ⁇ 35(6) ⁇ 46(5) ⁇ 58(6) ⁇ 1(7) ⁇ 13(8) ⁇ 24(7) ⁇ 36(8) ⁇ 47(7) ⁇ 59(8) ⁇ 70(7 ) ⁇ 10(8) ⁇ 70(8) ⁇ 58(7) ⁇ 47(8) ⁇ 35(7) ⁇ 24(8) ⁇ 12(7) ⁇ 1(8) ⁇ 61(7) ⁇ 46(6 ) ⁇ 34(5) ⁇ 23(6) ⁇ 11(5) ⁇ 72(6) ⁇ 60(5) ⁇ 49(6) ⁇ 37(5) ⁇ 22(4) ⁇ 10(3) ⁇ 71(4 ) ⁇ 59(3) ⁇ 48(4) ⁇ 36(3) ⁇ 25(4) ⁇ 13(3) ⁇ 70(2) ⁇ 58(1) ⁇ 47(2) ⁇ 35(1) ⁇ 24(2 ) ⁇ 12(1)
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71(1 ) ⁇ 11(2) ⁇ 22(1) ⁇ 34(2) ⁇ 49(3) ⁇ 61(4) ⁇ 72(3) ⁇ 12(4) ⁇ 23(3) ⁇ 35(4) ⁇ 46(3 ) ⁇ 58(4) ⁇ 1(5) ⁇ 13(6) ⁇ 24(5) ⁇ 36(6) ⁇ 47(5) ⁇ 59(6) ⁇ 70(5) ⁇ 10(6) ⁇ 25(7 ) ⁇ 37(8) ⁇ 48(7) ⁇ 60(8) ⁇ 71(7) ⁇ 11(8) ⁇ 22(7) ⁇ 34(8) ⁇ 22(8) ⁇ 10(7) ⁇ 71(8 ) ⁇ 59(7) ⁇ 48(8) ⁇ 36(7) ⁇ 25(8) ⁇ 13(7) ⁇ 70(6) ⁇ 58(5) ⁇ 47(6) ⁇ 35(5) ⁇ 24(6 ) ⁇ 12(5) ⁇ 1(6) ⁇ 61(5) ⁇ 46(4) ⁇ 34(3) ⁇ 23(4) ⁇ 11(3) ⁇ 72(4) ⁇ 60(3) ⁇ 49(4 ) ⁇ 37(3) ⁇ 22(2) ⁇ 10(1) ⁇ 71(2) ⁇ 59(1) ⁇ 36(1) ⁇ 25(2) ⁇ 13(1) ⁇ 25(1) ⁇ 37(2 ) ⁇ 48
  • the third parallel branch of the U-phase winding winds from the voltage outlet position U3 to the neutral The point lead-out line is located at ) ⁇ 1(3) ⁇ 13(4) ⁇ 24(3) ⁇ 36(4) ⁇ 47(3) ⁇ 59(4) ⁇ 70(3) ⁇ 10(4) ⁇ 25(5) ⁇ 37(6 ) ⁇ 48(5) ⁇ 60(6) ⁇ 71(5) ⁇ 11(6) ⁇ 22(5) ⁇ 34(6) ⁇ 49(7) ⁇ 61(8) ⁇ 72(7) ⁇ 12(8 ) ⁇ 23(7) ⁇ 35(8) ⁇ 46(7) ⁇ 58(8) ⁇ 46(8) ⁇ 34(7) ⁇ 23(8) ⁇ 11(7) ⁇ 72(8) ⁇ 60(7 ) ⁇ 49(8) ⁇ 37(7) ⁇ 22(6) ⁇ 10(5) ⁇ 71(6) ⁇ 59(5) ⁇ 48(6) ⁇ 36(5) ⁇ 25(6) ⁇ 13(5 ) ⁇ 70(4) ⁇ 58(3) ⁇ 47(4) ⁇ 35(3) ⁇ 24(4) ⁇ 12(3) ⁇ 1(4) ⁇ 61(3) ⁇ 46(2) ⁇ 34(1 ) ⁇ 23(2) ⁇ 11(1) ⁇ 72(2) ⁇ 60(1) ⁇ 49(2) ⁇ 37(1) ⁇ 49(1) ⁇ 61(2).
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 71(1), and X2 corresponds to 60(2); U3 corresponds to 72(1), and X3 corresponds to 61(2). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • the pitch of the long-distance hairpin coil is s/(2p)+4
  • the pitch of the full-distance hairpin coil is s/(2p)
  • the pitch of the short-distance hairpin coil is also is s/(2p)
  • the short-distance hairpin coil also serves as the full-distance hairpin coil
  • the first leg 211 and the second leg 212 of the short-distance hairpin coil full-distance hairpin coil
  • the number of stator slots s 6pq
  • the number of slot layers n in the stator slot 11 is an even number
  • the polarity distribution of each odd-numbered layer is the same
  • the polarity distribution of each even-numbered layer is the same and is offset by one stator slot relative to the polarity distribution of the odd-numbered layer.
  • the hairpin coils of the parallel branches in each phase winding traverse n slot layers in different stator slots 11, and the winding mode of the windings can be wave winding or overlapping winding; a certain parallel branch in the same-phase winding moves a certain amount After the number of stator slots 11, it overlaps with other parallel branches in the winding.
  • the adjacent q slot positions of the same polarity of the parallel branches in the same-phase winding are shifted by 1 slot toward the adjacent pole, so that the equivalent pitch of one phase is smaller than the full pitch pitch. distance to achieve a short distance effect, thereby reducing the back electromotive force harmonics of the flat wire motor, improving the efficiency of the flat wire motor and optimizing the vehicle's NVH (noise, vibration and acoustic harshness).
  • NVH noise, vibration and acoustic harshness
  • the number n of slot layers of the stator slot 11 can be an even number such as 2, 4, 6, 8, 10, etc.
  • Each phase winding includes three parallel branches, and the pitch combination of the hairpin coils 21 in each parallel branch is 12 and 16, that is, the pitch of the long-distance hairpin coil is 16, and the pitch of the full-distance hairpin coil is 12.
  • the welding pitch between hairpin coils in each parallel branch is 11.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 12(2) ⁇ 24(1) ⁇ 35(2) ⁇ 47(1) ⁇ 58(2) ⁇ 70(1) ⁇ 9(2) ⁇ 25(3) ⁇ 36(4) ⁇ 48(3 ) ⁇ 59(4) ⁇ 71(3) ⁇ 10(4) ⁇ 22(3) ⁇ 33(4) ⁇ 21(4) ⁇ 10(3) ⁇ 70(4) ⁇ 59(3) ⁇ 47(4 ) ⁇ 36(3) ⁇ 24(4) ⁇ 13(3) ⁇ 69(2) ⁇ 58(1) ⁇ 46(2) ⁇ 35(1) ⁇ 23(2) ⁇ 12(1) ⁇ 72(2 ) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number through which the second parallel branch is connected in series is: 71(1 ) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3 ) ⁇ 57(4) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2 ) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1) ⁇ 25(1) ⁇ 36(2) ⁇ 48(1 ) ⁇ 59(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 72 (1 ) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3 ) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 69(4) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 23(4) ⁇ 12(3) ⁇ 72(4 ) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1) ⁇ 49(1 ) ⁇ 60(2).
  • the second winding method can also be used, and only four winding methods are needed in the stator winding 20. Card coil.
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 corresponds to 61(1); U2 corresponds to 25(1), and X2 corresponds to 13(1) ); U3 corresponds to 49(1), and X3 corresponds to 37(1). U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • U1, U2 and U3 are rotationally symmetrical with respect to the stator core 10, and are all 24 stator slots 11 apart; X1, X2 and X3 are also rotationally symmetrical with respect to the stator core 10, and all differ by 24 stator slots 11.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the first parallel branch through which the series connection passes is: 1 (1) ⁇ 12(2) ⁇ 24(1) ⁇ 35(2) ⁇ 47(1) ⁇ 58(2) ⁇ 70(1) ⁇ 9(2) ⁇ 25(3) ⁇ 36(4) ⁇ 48 (3) ⁇ 59(4) ⁇ 71(3) ⁇ 10(4) ⁇ 22(3) ⁇ 33(4) ⁇ 21(4) ⁇ 10(3) ⁇ 70(4) ⁇ 59(3) ⁇ 47 (4) ⁇ 36(3) ⁇ 24(4) ⁇ 13(3) ⁇ 69(2) ⁇ 58(1) ⁇ 46(2) ⁇ 35(1) ⁇ 23(2) ⁇ 12(1) ⁇ 72 (2) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 25(1) ⁇ 36(2) ⁇ 48(1) ⁇ 59(2) ⁇ 71(1) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3) ⁇ 57(4) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1) .
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 49(1) ⁇ 60(2) ⁇ 72(1) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 69(4) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 24(4) ⁇ 12(3) ⁇ 72(4) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1) .
  • this embodiment adopts the first winding method. Seven hairpin coils are needed in the stator winding 20.
  • the starting slot and end slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1 ( 1), X1 corresponds to 61(1); U2 corresponds to 71(1), X2 corresponds to 59(2); U3 corresponds to 72(1), and X3 corresponds to 60(2).
  • U1, U2 and U3 are connected in parallel, X1, X2 and X3 are connected in parallel, and finally connected through bus bars to form the completed U-phase winding.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 1(1 ) ⁇ 12(2) ⁇ 24(1) ⁇ 35(2) ⁇ 47(1) ⁇ 58(2) ⁇ 70(1) ⁇ 9(2) ⁇ 25(3) ⁇ 36(4) ⁇ 48(3 ) ⁇ 59(4) ⁇ 71(3) ⁇ 10(4) ⁇ 22(3) ⁇ 33(4) ⁇ 49(5) ⁇ 60(6) ⁇ 72(5) ⁇ 11(6) ⁇ 23(5 ) ⁇ 34(6) ⁇ 46(5) ⁇ 57(6) ⁇ 45(6) ⁇ 34(5) ⁇ 22(6) ⁇ 11(5) ⁇ 71(6) ⁇ 60(5) ⁇ 48(6 ) ⁇ 34(5) ⁇ 22(6) ⁇ 11(5) ⁇ 71(6) ⁇ 60(5) ⁇ 48(6) ⁇ 37(5) ⁇ 21(4) ⁇ 10(3) ⁇ 70(4 ) ⁇ 59(3) ⁇ 47(4) ⁇ 36(3) ⁇ 24(4) ⁇ 13(3) ⁇ 69(2) ⁇ 58(1) ⁇ 46(2) ⁇ 35(1) ⁇ 23(2 ) ⁇ 12(1) ⁇ 61(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead wire position U2 to the neutral point lead wire position X2.
  • the slot number of the series connection of the second parallel branch is: 71(1 ) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3 ) ⁇ 57(4) ⁇ 1(5) ⁇ 12(6) ⁇ 24(5) ⁇ 35(6) ⁇ 47(5) ⁇ 58(6) ⁇ 70(5) ⁇ 9(6) ⁇ 69(6 ) ⁇ 58(5) ⁇ 46(6) ⁇ 35(5) ⁇ 23(6) ⁇ 12(5) ⁇ 72(6) ⁇ 61(5) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4 ) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2 ) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1) ⁇ 25(1) ⁇ 36(2) ⁇ 48(1) ⁇ 59(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 72 (1 ) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3 ) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 25(5) ⁇ 36(6) ⁇ 48(5) ⁇ 59(6) ⁇ 71(5) ⁇ 10(6) ⁇ 22(5 ) ⁇ 33(6) ⁇ 21(6) ⁇ 10(5) ⁇ 70(6) ⁇ 59(5) ⁇ 47(6) ⁇ 36(5) ⁇ 24(6) ⁇ 13(5) ⁇ 69(4 ) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 23(4) ⁇ 12(3) ⁇ 72(4) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2 ) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1) ⁇ 49(1) ⁇ 60(2).
  • the starting and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 1(1), X1 Corresponds to 61(1); U2 corresponds to 25(1), X2 corresponds to 13(1); U3 corresponds to 49(1), and X3 corresponds to 37(1).
  • the slot number through which the first parallel branch is connected in series is the same as above and will not be described again.
  • the slot number through which the second parallel branch is connected in series is: 25(1) ⁇ 36(2) ⁇ 48(1) ⁇ 59(2) ⁇ 71(1) ⁇ 10(2) ⁇ 22(1) ⁇ 33(2) ⁇ 49(3) ⁇ 60(4) ⁇ 72(3) ⁇ 11(4) ⁇ 23(3) ⁇ 34(4) ⁇ 46(3) ⁇ 57(4) ⁇ 1(5) ⁇ 12(6) ⁇ 24(5) ⁇ 35(6) ⁇ 47(5) ⁇ 58(6) ⁇ 70(5) ⁇ 9(6) ⁇ 69(6) ⁇ 58(5) ⁇ 46(6) ⁇ 35(5) ⁇ 23(6) ⁇ 12(5) ⁇ 72(6) ⁇ 61(5) ⁇ 45(4) ⁇ 34(3) ⁇ 22(4) ⁇ 11(3) ⁇ 71(4) ⁇ 60(3) ⁇ 48(4) ⁇ 37(3) ⁇ 21(2) ⁇ 10(1) ⁇ 70(2) ⁇ 59(1) ⁇ 47(2) ⁇ 36(1) ⁇ 24(2) ⁇ 13(1).
  • the slot number through which the third parallel branch is connected in series is: 49(1) ⁇ 60(2) ⁇ 72(1) ⁇ 11(2) ⁇ 23(1) ⁇ 34(2) ⁇ 46(1) ⁇ 57(2) ⁇ 1(3) ⁇ 12(4) ⁇ 24(3) ⁇ 35(4) ⁇ 47(3) ⁇ 58(4) ⁇ 70(3) ⁇ 9(4) ⁇ 25(5) ⁇ 36(6) ⁇ 48(5) ⁇ 59(6) ⁇ 71(5) ⁇ 10(6) ⁇ 22(5) ⁇ 33(6) ⁇ 21(6) ⁇ 10(35) ⁇ 70(6) ⁇ 59(5) ⁇ 47(6) ⁇ 36(5) ⁇ 24(6) ⁇ 13(5) ⁇ 69(4) ⁇ 58(3) ⁇ 46(4) ⁇ 35(3) ⁇ 23(4) ⁇ 12(3) ⁇ 72(4) ⁇ 61(3) ⁇ 45(2) ⁇ 34(1) ⁇ 22(2) ⁇ 11(1) ⁇ 71(2) ⁇ 60(1) ⁇ 48(2) ⁇ 37(1).
  • a 2 then the pitch of the long-distance hairpin coil is s/(2p)+2, the pitch of the full-distance hairpin coil is s/(2p), and the pitch of the short-distance hairpin coil is s/(2p)-2.
  • the number of stator slots s can be 72
  • the number of rotor pole pairs p is 3
  • the number of slot layers n of the stator slots 11 can be one of 4, 6, 8 and 10, then the pitch of the long-distance hairpin coil is 14.
  • the pitch of the full-pitch card issuing coil is 12, and the pitch of the short-pitch card issuing coil is 10. That is, the pitch combination of the card issuing coil 21 in each parallel branch is 10, 12, and 14.
  • the pitch of the card issuing coil in each parallel branch is 10, 12, and 14.
  • the welding pitch between coils is 13.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 72(1 ) ⁇ 13(2) ⁇ 23(1) ⁇ 36(2) ⁇ 46(1) ⁇ 59(2) ⁇ 69(1) ⁇ 10(2) ⁇ 24(3) ⁇ 37(4) ⁇ 47(3 ) ⁇ 60(4) ⁇ 70(3) ⁇ 11(4) ⁇ 21(3) ⁇ 34(4) ⁇ 22(4) ⁇ 9(3) ⁇ 71(4) ⁇ 58(3) ⁇ 48(4 ) ⁇ 35(3) ⁇ 25(4) ⁇ 12(3) ⁇ 70(2) ⁇ 57(1) ⁇ 47(2) ⁇ 34(1) ⁇ 24(2) ⁇ 11(1) ⁇ 1(2 ) ⁇ 60(1).
  • the second parallel branch of the U-phase winding winds from the voltage lead-out position U2 to the neutral
  • the point lead-out line is located at ) ⁇ 71(3) ⁇ 12(4) ⁇ 22(3) ⁇ 35(4) ⁇ 45(3) ⁇ 58(4) ⁇ 46(4) ⁇ 33(3) ⁇ 23(4) ⁇ 10(3 ) ⁇ 72(4) ⁇ 59(3) ⁇ 49(4) ⁇ 36(3) ⁇ 22(2) ⁇ 9(1) ⁇ 71(2) ⁇ 58(1) ⁇ 48(2) ⁇ 35(1 ) ⁇ 25(2) ⁇ 12(1) ⁇ 24(1) ⁇ 37(2) ⁇ 47(1) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 71(1 ) ⁇ 12(2) ⁇ 22(1) ⁇ 35(2) ⁇ 45(1) ⁇ 58(2) ⁇ 72(3) ⁇ 13(4) ⁇ 23(3) ⁇ 36(4) ⁇ 46(3 ) ⁇ 59(4) ⁇ 69(3) ⁇ 10(4) ⁇ 70(4) ⁇ 57(3) ⁇ 47(4) ⁇ 34(3) ⁇ 24(4) ⁇ 11(3) ⁇ 1(4 ) ⁇ 60(3) ⁇ 46(2) ⁇ 33(1) ⁇ 23(2) ⁇ 10(1) ⁇ 72(2) ⁇ 59(1) ⁇ 49(2) ⁇ 36(1) ⁇ 48(1 ) ⁇ 61(2).
  • the start slot and end slot numbers corresponding to the three parallel branches are distributed as follows: U1 corresponds to 72(1), X1 corresponds to 60(1); U2 corresponds to 70(1), X2 corresponds to 60(2); U3 corresponds to 71( 1), X3 corresponds to 61(2).
  • the second winding method if the second winding method is adopted, only four types of hairpin coils are needed in the stator winding 20 .
  • the difference from the first winding method lies in the starting slot and the ending slot of the parallel branch.
  • the start slot and end slot numbers corresponding to the three parallel branches are distributed as follows: U1 corresponds to 72(1), X1 corresponds to 60(1); U2 corresponds to 24(1), X2 corresponds to 12(1); U3 corresponds to 48(1), X3 corresponds to 36(1).
  • this embodiment adopts the first winding method, and requires 7 hairpin coils in the stator winding 20.
  • the first parallel branch of the U-phase winding winds from the voltage lead wire position U1 to the neutral point lead wire position X1.
  • the slot number of the series connection of the first parallel branch is: 72 (1 ) ⁇ 13(2) ⁇ 23(1) ⁇ 36(2) ⁇ 46(1) ⁇ 59(2) ⁇ 69(1) ⁇ 10(2) ⁇ 24(3) ⁇ 37(4) ⁇ 47(3 ) ⁇ 60(4) ⁇ 70(3) ⁇ 11(4) ⁇ 21(3) ⁇ 34(4) ⁇ 48(5) ⁇ 61(6) ⁇ 71(5) ⁇ 12(6) ⁇ 22(5 ) ⁇ 35(6) ⁇ 45(5) ⁇ 58(6) ⁇ 46(6) ⁇ 33(5) ⁇ 23(6) ⁇ 10(5) ⁇ 72(6) ⁇ 59(5) ⁇ 49(6 ) ⁇ 36(5) ⁇ 22(4) ⁇ 9(3) ⁇ 71(4) ⁇ 58(3) ⁇ 48(4) ⁇ 35(3) ⁇ 25(4) ⁇ 12(3) ⁇ 70(2 ) ⁇ 57(1) ⁇ 47(2) ⁇ 34(1) ⁇ 24(2) ⁇ 11(1) ⁇ 1(2) ⁇ 60(1).
  • the second parallel branch of the U-phase winding winds from the voltage outlet position U2 to the neutral The point lead-out line is located at ) ⁇ 71(3) ⁇ 12(4) ⁇ 22(3) ⁇ 35(4) ⁇ 45(3) ⁇ 58(4) ⁇ 72(5) ⁇ 13(6) ⁇ 23(5) ⁇ 36(6 ) ⁇ 46(5) ⁇ 59(6) ⁇ 69(5) ⁇ 10(6) ⁇ 70(6) ⁇ 57(5) ⁇ 47(6) ⁇ 34(5) ⁇ 24(6) ⁇ 11(5 ) ⁇ 1(6) ⁇ 60(5) ⁇ 46(4) ⁇ 33(3) ⁇ 23(4) ⁇ 10(3) ⁇ 72(4) ⁇ 59(3) ⁇ 49(4) ⁇ 36(3 ) ⁇ 22(2) ⁇ 9(1) ⁇ 71(2) ⁇ 58(1) ⁇ 48(2) ⁇ 35(1) ⁇ 25(2) ⁇ 12(1) ⁇ 24(1) ⁇ 37(2 ) ⁇ 47(1) ⁇ 60(2).
  • the third parallel branch of the U-phase winding winds from the voltage lead wire position U3 to the neutral point lead wire position X3.
  • the slot number of the series connection of the third parallel branch is: 71(1 ) ⁇ 12(2) ⁇ 22(1) ⁇ 35(2) ⁇ 45(1) ⁇ 58(2) ⁇ 72(3) ⁇ 3(4) ⁇ 23(3) ⁇ 36(4) ⁇ 46(3 ) ⁇ 59(4) ⁇ 69(3) ⁇ 10(4) ⁇ 24(5) ⁇ 37(6) ⁇ 47(5) ⁇ 60(6) ⁇ 70(5) ⁇ 11(6) ⁇ 21(5 ) ⁇ 34(6) ⁇ 22(6) ⁇ 9(5) ⁇ 71(6) ⁇ 58(5) ⁇ 48(6) ⁇ 35(5) ⁇ 25(6) ⁇ 12(5) ⁇ 70(4 ) ⁇ 57(3) ⁇ 47(4) ⁇ 34(3) ⁇ 24(4) ⁇ 11(3) ⁇ 1(4) ⁇ 60(3) ⁇ 46(2) ⁇ 33(1) ⁇ 23(2 ) ⁇ 10(1) ⁇ 72(2) ⁇ 59(1) ⁇ 49(2) ⁇ 36(1) ⁇ 48(1) ⁇ 61(2).
  • the starting slot and ending slot numbers corresponding to the three parallel branches in the U-phase winding are distributed as follows: U1 corresponds to 72(1), X1 corresponds to 60(1); U2 corresponds to 70(1), and X2 corresponds to 60(2); U3 corresponds to 71(1), and X3 corresponds to 61(2).
  • the back electromotive force harmonic content of the peak torque operating point of the 6-pole 72-slot flat wire motor is compared.
  • the back electromotive force of the existing art full-pitch winding motor The harmonic content is 4.75%.
  • the harmonic content of the back electromotive force using the embodiment of the present application is 3.98%, which is a decrease of 16.2%. It can be seen that the winding method provided by the present application can reduce the back electromotive force harmonics and improve the motor efficiency.
  • a power assembly which includes a reducer and the above-mentioned flat wire motor.
  • the flat wire motor and the reducer are connected in transmission.
  • the drive shaft of the flat wire motor and the input shaft of the reducer can be connected through transmission components such as couplings to output the driving force from the flat wire motor to the reducer.
  • a vehicle in another aspect of the present application, includes the above-mentioned power assembly.
  • the above-mentioned power assembly is arranged in the vehicle and provides operating power for the vehicle.
  • the vehicle may be a new energy vehicle driven by electric energy.
  • new energy vehicles can specifically be hybrid electric vehicles, pure electric vehicles or fuel cell electric vehicles, etc., or they can be vehicles that use high-efficiency energy storage devices such as supercapacitors, flywheel batteries or flywheel energy storage devices as the source of electric energy.
  • this application discloses a stator, a flat wire motor, a powertrain and a vehicle.
  • the magnetic field distribution of the multiple parallel branches in each phase winding is the same and the potential is balanced, thus avoiding the circulation current generated between the parallel branches, thus greatly reducing the
  • the additional AC copper loss at small high frequencies improves the efficiency of the flat wire motor during high-speed operation, avoids local overtemperature of the winding, and extends the life of the flat wire motor; and the hairpin coils of each parallel branch are in different stator slots
  • the potential phase difference caused by multiple parallel branches in each phase winding due to their position in the stator slot can be eliminated, and by calculating the number of slot layers N in the stator slot and the corresponding position of each parallel branch in each
  • the total number of slot layers occupied in the stator slot is limited to reduce the linear types of hairpin coils, thereby reducing the manufacturing mold of the flat wire

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Abstract

本申请公开了一种定子、扁线电机、动力总成和车辆。该定子包括：定子铁芯的内壁沿其周向均布有多个定子槽；每一相绕组包括在周向上旋转对称的多条并联支路，每一并联支路包括用连接线连接且不同节距的多个发卡线圈，任一定子槽内均设有N层发卡线圈，每一并联支路的发卡线圈在不同定子槽中遍历N个槽层；当N＝(2n+1)×2时，每一并联支路在每一定子槽占据的槽层总数组合为2n，或2n、2n-1、2n-2；当N＝2n×2时，每一并联支路在每一定子槽占据的槽层总数组合为2n、2n-1，或2n、2n-1、2n-2；当N＝2n+1时，每一并联支路在每一定子槽占据的槽层总数组合为n、n-1，或n、n-1、n-2。通过上述方式，本申请提供的定子能够避免产生环流，降低制作成本，提高加工制造效率。

Description

定子、扁线电机、动力总成和车辆 【技术领域】
本申请涉及扁线电机技术领域，特别是涉及一种定子、扁线电机、动力总成和车辆。
【背景技术】
随着新能源汽车的大力推广，新能源电动汽车越来越普及，市场对电动汽车的动力系统性能需求不断提高，主驱电机是动力系统的动力输出部件，是电动汽车最核心的部件之一，主驱电机的性能指标要求也越来越高，例如高功率密度和扭矩密度，小体积和轻重量。随着扁线工艺的发展，电动汽车的电机逐渐采用扁线绕组，扁线绕组可以提升定子槽满率，进一步提高电机功率密度、效率和导热性。
现有电机主要采用波绕组或叠绕组的绕组结构，通过将绕组结构中的扁线导体设计为多层，可有效降低电机的交流电阻。但是随着扁线导体层数的增加，绕组结构的布线方式也不尽相同。目前绕组结构的三相绕组通常设有多个并联支路，支路间就容易产生环流，而且发卡线圈的线型种类也很繁多，生产工艺复杂，制造成本高。
【发明内容】
基于此，本发明提供一种定子、扁线电机、动力总成和车辆。
第一方面，本发明提供了一种扁线电机的定子，包括定子铁芯，所述定子铁芯的内壁沿其周向开均布有多个定子槽；
定子绕组包括三相绕组，每一相绕组包括多条并联支路，所述多条并联支路在周向上旋转对称，每一所述并联支路包括用连接线连接且不同节距的多个发卡线圈，任一所述定子槽内均设有N层所述发卡线圈，每一所述并联支路的发卡线圈在不同定子槽中遍历N个槽层，所述三相绕组沿所述定子铁芯的周向依次呈周期排列设置。当N＝(2n+1)×2时，每一所述并联支路在每一所述定子槽占据的槽层总数组合为2n，或2n、2n-1、2n-2。当N＝2n×2时，每一所述并联支路在每一所述定子槽占据的槽层总数组合为2n、2n-1，或2n、2n-1、2n-2。 当N＝2n+1时，每一所述并联支路在每一所述定子槽占据的槽层总数组合为n、n-1，或n、n-1、n-2；其中N为正整数且大于等于4，且每一所述并联支路在每一所述定子槽的槽层总数也为正整数。
进一步地，每一所述并联支路在所述定子槽中占据的槽层总数为1时，所述一个槽层的位置为所述定子槽的第一层或第N层。每一所述并联支路在所述定子槽中占据的槽层总数为2时，所述2个槽层在所述定子槽中呈相邻设置，或所述2个槽层分别为所述定子槽中的第一层和第N层。每一所述并联支路在所述定子槽中占据的槽层总数为3时，所述3个槽层中的两个呈相邻设置，剩余一个槽层的位置为所述定子槽的第一层或第N层，且与另外两个槽层间隔四个槽层。每一所述并联支路在所述定子槽中占据的槽层总数为4时，所述4个槽层分为两组，每组相间隔四个槽层，每组包括相邻设置的两个槽层。
进一步地，每一相绕组包括三条并联支路。
进一步地，所述定子槽的数量为54或72。
进一步地，每一所述并联支路中发卡线圈的节距组合为8、9、11、12、16。
进一步地，每一所述并联支路在同一槽层的发卡线圈节距均为9。
进一步地，每一所述并联支路在第一槽层或第N槽层的发卡线圈节距为8或8、11。
进一步地，每一所述并联支路的进线端在所述槽层的第N层，出线端在所述槽层的第N-1层，或每一所述并联支路的进线端和出线端均在第一槽层和第N槽层。
进一步地，每一所述并联支路中所述发卡线圈之间的焊接节距都为9或11。
进一步地，每一所述并联支路包括节距为s/(2p)+a的长距发卡线圈、节距为s/(2p)的整距发卡线圈和节距为s/(2p)+a-4的短距发卡线圈。其中，s为定子槽数、p为并联支路的条数、a为大于等于2且小于等于4的整数。
进一步地，每一所述并联支路中，所述短距发卡线圈的第一支脚和第二支脚分别位于第k槽层和第k+1槽层，所述长距发卡线圈的第一支脚和第二支脚分别位于第k+1槽层和第k+2槽层，所述整距发卡线圈的第一支脚和第二支脚均分布于第1槽层或第n槽层；其中k为大于等于1且小于等于n的奇数。
进一步地，所述扁线电机的每极每相槽数为q，每相绕组的p条并联支路的电压引出线在s个所述定子槽内且在不同所述定子槽的同一槽层或相邻槽层，每相绕组的p条并联支路的中性点引出线在s个所述定子槽内且在不同所述定子槽 的同一槽层或相邻槽层。
进一步地，所述电压引出线和所述中性点引出线均位于第1槽层或第n槽层。
进一步地，每一所述并联支路中所述发卡线圈之间的焊接节距都为s/(2p)。
进一步地，n为偶数，a＝4，所述短距发卡线圈为所述整距发卡线圈，在所述三相绕组的相带分布中，各奇数层的极性分布相同，各偶数层的极性分布相同且相对所述奇数层的极性分布错位一个定子槽。
进一步地，所述定子槽的槽层数为4、6、8和10中的一种，每一所述并联支路中发卡线圈的节距组合为10、12、14，每一所述并联支路中所述发卡线圈之间的焊接节距均为13。
进一步地，每一所述发卡线圈包括第一支脚、第二支脚、连接段、第一弯折段和第二弯折段，所述第一支脚和所述第二支脚平行设置并分别插设于不同定子槽的槽层，所述连接段连接于所述第一支脚和所述第二支脚的一端，所述第一弯折段连接于所述第一支脚的另一端，所述第二弯折段连接于所述第二支脚的另一端，且所述第一弯折段和所述第二弯折段还均连接有焊接端。
进一步地，所述第一弯折段和第二弯折段的折弯方向相同平行或呈对称设置。
第二方面，本发明提供了一种扁线电机，包括转子和如上述任一项所述的定子，所述转子设于所述定子铁芯的内壁所围设形成的空间内。
第三方面，本发明提供了一种动力总成，包括减速器和如上述所述的扁线电机，所述扁线电机与所述减速器传动连接。
第四方面，本发明提供了一种车辆，所述车辆包括如上述所述的动力总成。
本申请的有益效果是：区别于现有技术的情况，本申请公开了一种定子、扁线电机、动力总成和车辆。通过每相绕组的多条并联支路在周向上旋转对称，则使得每相绕组中多个并联支路的磁场分布相同，电势平衡，因而避免了并联支路间产生的环流，从而可大幅减小高频下的附加交流铜耗，提高高速运行时的扁线电机效率，并避免了绕组局部过温，延长了扁线电机的寿命；且每一并联支路的发卡线圈在不同定子槽中遍历N个槽层，从而可消除每相绕组中多个并联支路因在定子槽中的位置引起的电势相位差，且通过对定子槽中槽层数N和对应每一并联支路在每一定子槽中占据的槽层总数的限定，以减小发卡线圈的线型种类，从而减小了扁线电机的制造模具，以降低制作成本，可有效地提 高加工制造效率。
【附图说明】
图1为本申请提供的扁线电机的定子一实施例的结构示意图；
图2为如图1所示定子中定子铁芯铁芯的结构示意图；
图3为如图1所示定子中每相绕组中并联支路采用星形方式接线的电路示意图；
图4为如图1所示定子中每相绕组中并联支路采用三角形方式接线的电路示意图；
图5为如图1所示定子中发卡线圈的结构示意图；
图6为如图1所示定子中发卡线圈的另一种结构示意图；
图7为如图2所示定子铁芯中定子槽的槽层结构示意图；
图8为本申请提供的6极54槽扁线电机且槽层数为4时U相绕组的第一种绕线示意图；
图9为本申请提供的6极54槽扁线电机且槽层数为4时U相绕组的第二种绕线示意图；
图10为本申请提供的6极54槽扁线电机且槽层数为5时U相绕组的绕线示意图；
图11为本申请提供的6极54槽扁线电机且槽层数为6时U相绕组的第一种绕线示意图；
图12为本申请提供的6极54槽扁线电机且槽层数为6时U相绕组的第二种绕线示意图；
图13为本申请提供的6极54槽扁线电机且槽层数为7时U相绕组的绕线示意图；
图14为本申请提供的6极54槽扁线电机且槽层数为8时U相绕组的绕线示意图；
图15为本申请提供的6极54槽扁线电机且槽层数为9时U相绕组的绕线示意图；
图16为本申请提供的6极54槽扁线电机且槽层数为10时U相绕组的绕线示意图；
图17为本申请提供的扁线电机为6极72槽且槽层数为4、a为3时U相绕 组第一并联支路的绕线示意图；
图18为如图17所示扁线电机中U相绕组第二并联支路的绕线示意图；
图19为如图17所示扁线电机中U相绕组第三并联支路的绕线示意图；
图20为本申请提供的扁线电机为6极72槽且槽层数为6、a为3时U相绕组第一并联支路的绕线示意图；
图21为如图20所示扁线电机中U相绕组第二并联支路的绕线示意图；
图22为如图20所示扁线电机中U相绕组第三并联支路的绕线示意图；
图23是本申请提供的扁线电机为6极72槽且槽层数为8、a为3时U相绕组第一并联支路的绕线示意图；
图24为如图23所示扁线电机中U相绕组第二并联支路的绕线示意图；
图25为如图23所示扁线电机中U相绕组第三并联支路的绕线示意图；
图26是本申请提供的扁线电机为6极72槽且槽层数为4、a为4时的相带分布图；
图27为如图26所示扁线电机中U相绕组第一并联支路的绕线示意图；
图28为如图26所示扁线电机中U相绕组第二并联支路的绕线示意图；
图29为如图26所示扁线电机中U相绕组第三并联支路的绕线示意图；
图30是本申请提供的扁线电机为6极72槽且槽层数为6、a为4时U相绕组第一并联支路的绕线示意图；
图31为如图30所示扁线电机中U相绕组第二并联支路的绕线示意图；
图32为如图30所示扁线电机中U相绕组第三并联支路的绕线示意图；
图33是本申请提供的扁线电机为6极72槽且槽层数为4、a为2时U相绕组第一并联支路的绕线示意图；
图34为如图33所示扁线电机中U相绕组第二并联支路的绕线示意图；
图35为如图33所示扁线电机中U相绕组第三并联支路的绕线示意图；
图36是本申请提供的扁线电机为6极72槽且槽层数为6、a为2时U相绕组第一并联支路的绕线示意图；
图37为如图36所示扁线电机中U相绕组第二并联支路的绕线示意图；
图38为如图36所示扁线电机中U相绕组第三并联支路的绕线示意图。
【具体实施方式】
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清 楚、完整地描述，显然，所描述的实施例仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例中的术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”、“第三”的特征可以明示或者隐含地包括至少一个该特征。本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其他实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其他实施例相结合。
为方便理解，以下先对本申请中出现的专业名词作如下解释说明。
定子：是指电机中静止不动的部分，其作用在于产生旋转磁场。
转子：是指电机中的旋转部件，作用在于实现电能与机械能的转换。
节距：是指电机绕组中同一元件的两个元件边在电枢表面所跨的距离，通常用定子铁芯上开设的定子槽的数量来表示。
参阅图1和图2，图1是本申请提供的扁线电机的定子一实施例的结构示意图，图2是如图1所示定子中定子铁芯的结构示意图。本申请的一方面，提供了一种扁线电机，该扁线电机包括转子和定子，转子设于该定子的定子铁芯内壁所围设形成的空间内，该扁线电机的每极每相槽数可以为3，转子的极数为偶数，该扁线电机的槽极配合可以是6极54槽、8极72槽、10极90槽、12极108槽等，本申请对此不作具体限定。
如图1所示，该扁线电机的定子包括定子铁芯10和定子绕组20。
如图2所示，该定子铁芯10的内壁沿其周向开设有均布的多个定子槽11，定子槽11的数量为3的倍数，例如定子槽11的数量可以为54或72，且任一定 子槽11在定子铁芯10的轴线方向延伸，并沿定子铁芯10的轴线方向贯通定子铁芯10的内壁，定子槽11还沿定子铁芯10的径向划分为N层。
定子绕组20包括沿定子铁芯10的周向依次呈周期排列的三相绕组，三相绕组分别为U相绕组、V相绕组和W相绕组。其中，每一相绕组包括多条并联支路(下文记为p条并联支路)，多条并联支路在周向上旋转对称；例如，每一相绕组包括三条并联支路，该三条并联支路在定子铁芯10的周向上旋转对称，或者每一相绕组还可以包括两条或四条并联支路。
通过限定每项绕组中多条并联支路在周向上旋转对称，则使得每相绕组中多个并联支路的磁场分布相同，电势平衡，因而避免了并联支路间产生的环流，从而可大幅减小高频下的附加交流铜耗，提高高速运行时的扁线电机效率，并避免了绕组局部过温，延长了扁线电机的寿命。
本实施例中，定子由相位相差120度电角度的三相绕组和定子铁芯10构成，定子绕组20的结构在定子铁芯10中，每一相绕组包括3个并联支路，且3个并联支路以定子铁芯10的中心轴作为旋转轴，在同相绕组中的3条并联支路旋转对称。当该定子应用到扁线电机中时，该中心轴也可以是指扁线电机中转子的转子中心线。旋转对称可以是同相绕组中某一并联支路移动一定数量的定子槽后，而与该同相绕组中其他并联支路相重合。
参阅图5，图5是如图1所示定子中每相绕组中并联支路采用星形方式接线的电路示意图，其中每相绕组由3条并联支路构成。
可选地，请参阅图6，图6是如图1所示定子中每相绕组中并联支路采用三角形方式接线的电路示意图，其中每相绕组由3条并联支路构成。
结合参阅图1、图2和图3，其中图3是如图1所示定子中发卡线圈的结构示意图。
每一并联支路包括用连接线连接且不同节距的多个发卡线圈21，每个定子槽11内均设有n层发卡线圈21的扁线导体，n为正整数，即定子槽11中每一槽层均设有扁线导体。发卡线圈21由扁线导体形成，扁线导体的横截面呈矩形，其插设于定子槽11上。其中，每一发卡线圈21包括两个并行设置的直线段211及连接两个直线段211的连接段212，直线段211插设于定子槽11内，连接段212设置于定子槽11外，连接段212可以呈U型或V型，发卡线圈节距为发卡线圈21的两个并行设置的直线段211所跨过的定子槽数，发卡线圈21之间的焊接节距为相邻两个发卡线圈21的相邻直线段211所跨过的定子槽数。
发卡线圈21还包括与直线段211连接的弯折段213，弯折段213也设置于定子槽11外且与连接段212分别设置于定子铁芯10的端面，同一并联支路中相邻发卡线圈的相邻弯折段213之间通过连接线连接导通。
在一种实施例中，可将发卡线圈21插设于定子槽11后再对发卡线圈21进行折弯以形成弯折部223，其中发卡线圈21插设于定子槽11后，其连接段212形成定子绕组20的插线端，弯折部223形成定子绕组20的焊接端。
其中，发卡线圈的折弯方向还可以设置成向一侧折弯，在另一些实施例中，如图4所示，部分发卡线圈21的第一弯折段214和第二弯折段215的折弯方向平行，用于换向绕制；如图3所示，其余发卡线圈21的第一弯折段214和第二弯折段215的折弯方向呈对称设置，用于同相绕制。
本申请中，任一定子槽11内均设有N层发卡线圈21，即定子槽11的每一槽层均设有一发卡线圈21的两直线段211，每一并联支路的发卡线圈21在不同定子槽11中遍历N个槽层，从而可消除每相绕组中多个并联支路因在定子槽中的位置引起的电势相位差；其中N为正整数且大于等于4，例如N可以为4、5、6、7、8、9或10。举例来说，N为4，则每一定子槽11内设有4层直线段211。
同一相的多条并联支路均在不同定子槽中遍历n个槽层，且各相绕组所占的定子槽11在定子圆周上旋转对称，由此同一相的p条支路完全对称，在扁线电机正常运行时不会发生环流，减小了电机铜损，提升了电机效率。
参阅图7，图7是如图2所示定子铁芯中定子槽的槽层结构示意图，在一个具体的应用场景下，N为6，每一定子槽11内设有6层直线段211，即每个定子槽11内含有4层扁线导体，第1层记为L1，第2层记为L2，第3层记为L3，第4层记为L4，第5层记为L5，第6层记为L6。其中第1槽层为定子槽11的槽底层，第6槽层为槽口层，或者第1槽层为定子槽11的槽口层，第6槽层为槽底层。
在一实施例中，同一定子槽11内的发卡线圈21同相，因而相同定子槽11内的不同层直线段211之间不需要相间绝缘纸，可降低扁线电机的绝缘成本。
其中，当N＝(2n+1)×2时，每一并联支路在每一定子槽11占据的槽层总数组合为2n，或2n、2n-1、2n-2；当N＝2n×2时，每一并联支路在每一定子槽11占据的槽层总数组合为2n、2n-1，或2n、2n-1、2n-2；当N＝2n+1时，每一并联支路在每一定子槽11占据的槽层总数组合为n、n-1，或n、n-1、n-2；其中N为正整数且大于等于4，且每一并联支路在每一定子槽11的槽层总数也为 正整数。
例如，在上述应用场景下，定子槽11的槽层数N为4时，则每一并联支路在每一定子槽11所占据的槽层总数组合可以是2、1；定子槽11的槽层数N为6时，每一并联支路在每一定子槽11所占据的槽层总数组合可以是2或2、1；定子槽11的槽层数N为7时，则每一并联支路在每一定子槽11所占据的槽层总数组合可以是3、2或3、2、1。
通过对定子槽11中槽层数N和对应每一并联支路在每一定子槽中占据的槽层总数的限定，以减小发卡线圈21的线型种类，从而减小了扁线电机的制造模具，以降低制作成本，可有效地提高加工制造效率。
每一并联支路在定子槽11中占据的槽层总数为1时，该一个槽层的位置为定子槽11的第一层或第N层；每一并联支路在定子槽11中占据的槽层总数为2时，该2个槽层在定子槽11中呈相邻设置，或该2个槽层分别为定子槽11中的第一层和第N层；每一并联支路在定子槽11中占据的槽层总数为3时，该3个槽层中的两个呈相邻设置，剩余一个槽层的位置为该定子槽11的第一层或第N层，且与另外两个槽层间隔四个槽层；每一并联支路在定子槽11中占据的槽层总数为4时，4个槽层分为两组，每组相间隔四个槽层，每组包括相邻设置的两个槽层。通过这一限定措施，可进一步地减小发卡线圈21的线型种类，即进一步地减少制造模具数量，降低成本，提高加工制造效率。
在一实施例中，每一并联支路中发卡线圈21的节距组合为8、9、11、12、16。在另一实施例中，每一并联支路在同一槽层的发卡线圈21节距均为9。在又一实施例中，每一并联支路在第一槽层或第N槽层的发卡线圈21节距为8或8、11。其中，发卡线圈21的节距为该发卡线圈21中两直线段211所跨过的定子槽数。
其中，每一并联支路中发卡线圈21之间的焊接节距可以都为9或11，即同一并联支路中相邻两个发卡线圈21中相邻两直线段211所跨过的定子槽数均为9或是11。
在一些实施例中，每一并联支路的进线端在定子槽11的第N槽层，出线端在定子槽11槽层的第N-1槽层；或每一并联支路的进线端和出线端均在定子槽11的第一槽层和第N槽层，以方便并联支路的进线端和出线端引出。通过集中并联支路的引出线位置，从而可减小绕组在轴向和径向的空间，降低扁线电机的制造难度。
为了便于理解，以下将结合具体的应用场景对本申请中并联支路的连接方式做详细说明。
在一个具体的应用场景下，以6极54槽的扁线电机为例，其中定子铁芯10中定子槽11的数量为54，转子的极数为6，每极每相槽数为3，每一定子槽11中槽层数N为4。定子绕组分为U相、V相和W相，每一相绕组设置的并联支路的数量均为3个。
参阅图8，图8是本申请提供的6极54槽扁线电机且槽层数为4时U相绕组的第一种绕线示意图；图9是本申请提供的6极54槽扁线电机且槽层数为4时U相绕组的第二种绕线示意图。其中，实线代表插线端的接线方式，虚线代表焊接端的接线方式，U1、U2、U3可以作为电压引出线也可以作为中性点引出线，X1、X2、X3可以作为电压引出线也可以作为中性点引出线。
下面结合图8和图9，分别对本实施例中U相绕组中第一并列支路、第二并列支路和第三并列支路做详细说明。
其中，i(j)表示第i槽中的第j槽层，例如1(1)表示第1槽的第1槽层，10(2)表示第10槽的第2槽层。
该U相绕组的第一并列支路、第二并列支路和第三并列支路的绕线方式均有2种。
如图8所示，第一种绕线方式中，U相绕组的第一并联支路其串联连接经过的槽号为：1(1)→10(2)→21(1)→30(2)→38(1)→47(2)→2(3)→11(4)→19(3)→28(4)→39(3)→48(4)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→19(1)→28(2)→39(1)→48(2)→3(3)→12(4)→20(3)→29(4)→37(3)→46(4)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→20(1)→29(2)→37(1)→46(2)→1(3)→10(4)→21(3)→30(4)→38(3)→47(4)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)。
如图9所示，第二种绕线方式，U相绕组的第一并联支路其串联连接经过 的槽号为：1(1)→10(2)→19(3)→28(4)→39(3)→48(4)→2(3)→11(4)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)→21(1)→30(2)→38(1)→47(2)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→20(3)→29(4)→37(3)→46(4)→3(3)→12(4)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)→19(1)→28(2)→39(1)→48(2)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→21(3)→30(4)→38(3)→47(4)→1(3)→10(4)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)→20(1)→29(2)→37(1)→46(2)。
U相绕组、V相绕组和W相绕组对称均匀分布在定子铁芯10的圆周上，在此不再赘述V相绕组和W相绕组的绕线方式。
在另一个应用场景下，仍以6极54槽的扁线电机为例，其中定子铁芯10中定子槽11的数量为54，转子的极数为6，每极每相槽数为3，每一定子槽11中槽层数N为5。定子绕组分为U相、V相和W相，每一相绕组设置的并联支路的数量均为3个。
参阅图10，图10是本申请提供的6极54槽扁线电机且槽层数为5时U相绕组的绕线示意图。
如图10所示，U相绕组的第一并联支路其串联连接经过的槽号为：1(1)→10(2)→21(1)→30(2)→38(1)→47(2)→2(3)→11(4)→19(3)→28(4)→39(3)→48(4)→3(5)→48(5)→37(5)→28(5)→20(5)→11(5)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→19(1)→28(2)→39(1)→48(2)→3(3)→12(4)→20(3)→29(4)→37(3)→46(4)→1(5)→46(5)→38(5)→29(5)→21(5)→12(5)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→20 (1)→29(2)→37(1)→46(2)→1(3)→10(4)→21(3)→30(4)→38(3)→47(4)→2(5)→47(5)→39(5)→30(5)→19(5)→10(5)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)。
在另一个应用场景下，仍以6极54槽的扁线电机为例，其中定子铁芯10中定子槽11的数量为54，转子的极数为6，每极每相槽数为3，每一定子槽11中槽层数N为6。定子绕组分为U相、V相和W相，每一相绕组设置的并联支路的数量均为3个。
该U相绕组的第一并列支路、第二并列支路和第三并列支路的绕线方式均有2种。参阅图11和图12，图11是本申请提供的6极54槽扁线电机且槽层数为6时U相绕组的第一种绕线示意图，图12是本申请提供的6极54槽扁线电机且槽层数为6时U相绕组的第二种绕线示意图。
如图11所示，第一种绕线方式中，U相绕组的第一并联支路其串联连接经过的槽号为：1(1)→10(2)→21(1)→30(2)→38(1)→47(2)→2(3)→11(4)→19(3)→28(4)→39(3)→48(4)→3(5)→12(6)→20(5)→29(6)→37(5)→46(6)→3(6)→48(5)→37(6)→28(5)→20(6)→11(5)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→19(1)→28(2)→39(1)→48(2)→3(3)→12(4)→20(3)→29(4)→37(3)→46(4)→1(5)→10(6)→21(5)→30(6)→38(5)→47(6)→1(6)→46(5)→38(6)→29(5)→21(6)→12(5)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→20(1)→29(2)→37(1)→46(2)→1(3)→10(4)→21(3)→30(4)→38(3)→47(4)→2(5)→11(6)→19(5)→28(6)→39(5)→48(6)→2(6)→47(5)→39(6)→30(5)→19(6)→10(5)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)。
如图11所示，第二种绕线方式，U相绕组的第一并联支路其串联连接经过 的槽号为：1(1)→10(2)→19(3)→28(4)→39(3)→48(4)→2(3)→11(4)→20(5)→29(6)→37(5)→46(6)→3(5)→12(6)→3(6)→48(5)→37(6)→28(5)→20(6)→11(5)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)→21(1)→30(2)→38(1)→47(2)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→20(3)→29(4)→37(3)→46(4)→3(3)→12(4)→21(5)→30(6)→38(5)→47(6)→1(5)→10(6)→1(6)→46(5)→38(6)→29(5)→21(6)→12(5)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)→19(1)→28(2)→39(1)→48(2)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→21(3)→30(4)→38(3)→47(4)→1(3)→10(4)→19(5)→28(6)→39(5)→48(6)→2(5)→11(6)→2(6)→47(5)→39(6)→30(5)→19(6)→10(5)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)→20(1)→29(2)→37(1)→46(2)。
在另一个应用场景下，仍以6极54槽的扁线电机为例，其中定子铁芯10中定子槽11的数量为54，转子的极数为6，每极每相槽数为3，每一定子槽11中槽层数N为7。定子绕组分为U相、V相和W相，每一相绕组设置的并联支路的数量均为3个。
参阅图13，图13是本申请提供的6极54槽扁线电机且槽层数为7时U相绕组的绕线示意图。
如图13所示，U相绕组的第一并联支路其串联连接经过的槽号为：1(1)→10(2)→21(1)→30(2)→38(1)→47(2)→2(3)→11(4)→19(3)→28(4)→39(3)→48(4)→3(5)→12(6)→20(5)→29(6)→37(5)→46(6)→1(7)→46(7)→38(7)→29(7)→21(7)→12(7)→3(6)→48(5)→37(6)→28(5)→20(6)→11(5)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→19 (1)→28(2)→39(1)→48(2)→3(3)→12(4)→20(3)→29(4)→37(3)→46(4)→1(5)→10(6)→21(5)→30(6)→38(5)→47(6)→2(7)→47(7)→39(7)→39(7)→30(7)→19(7)→10(7)→1(6)→46(5)→38(6)→29(5)→21(6)→12(5)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→20(1)→29(2)→37(1)→46(2)→1(3)→10(4)→21(3)→30(4)→38(3)→47(4)→2(5)→11(6)→19(5)→28(6)→39(5)→48(6)→3(7)→48(7)→37(7)→28(7)→20(7)→11(7)→2(6)→47(5)→39(6)→30(5)→19(6)→10(5)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)。
在另一个应用场景下，仍以6极54槽的扁线电机为例，其中定子铁芯10中定子槽11的数量为54，转子的极数为6，每极每相槽数为3，每一定子槽11中槽层数N为8。定子绕组分为U相、V相和W相，每一相绕组设置的并联支路的数量均为3个。
参阅图14，图14是本申请提供的6极54槽扁线电机且槽层数为8时U相绕组的绕线示意图。
如图14所示，U相绕组的第一并联支路其串联连接经过的槽号为：1(1)→10(2)→21(1)→30(2)→38(1)→47(2)→2(3)→11(4)→19(3)→28(4)→39(3)→48(4)→3(5)→12(6)→20(5)→29(6)→37(5)→46(6)→1(7)→10(8)→21(7)→30(8)→38(7)→47(8)→1(8)→46(7)→38(8)→29(7)→21(8)→12(7)→3(6)→48(5)→37(6)→28(5)→20(6)→11(5)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→19(1)→28(2)→39(1)→48(2)→3(3)→12(4)→20(3)→29(4)→37(3)→46(4)→1(5)→10(6)→21(5)→30(6)→38(5)→47(6)→2(7)→11(8)→19(7)→28(8)→39(7)→48(8)→2(8)→47(7)→39(8)→30(7)→19(8)→10(7)→1(6)→46(5)→38(6)→ 29(5)→21(6)→12(5)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→20(1)→29(2)→37(1)→46(2)→1(3)→10(4)→21(3)→30(4)→38(3)→47(4)→2(5)→11(6)→19(5)→28(6)→39(5)→48(6)→3(7)→12(8)→20(7)→29(8)→37(7)→46(8)→3(8)→48(7)→37(8)→28(7)→20(8)→11(7)→2(6)→47(5)→39(6)→30(5)→19(6)→10(5)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)。
在另一个应用场景下，仍以6极54槽的扁线电机为例，其中定子铁芯10中定子槽11的数量为54，转子的极数为6，每极每相槽数为3，每一定子槽11中槽层数N为9。定子绕组分为U相、V相和W相，每一相绕组设置的并联支路的数量均为3个。
参阅图15，图15是本申请提供的6极54槽扁线电机且槽层数为9时U相绕组的绕线示意图。
如图15所示，U相绕组的第一并联支路其串联连接经过的槽号为：1(1)→10(2)→21(1)→30(2)→38(1)→47(2)→2(3)→11(4)→19(3)→28(4)→39(3)→48(4)→3(5)→12(6)→20(5)→29(6)→37(5)→46(6)→1(7)→10(8)→21(7)→30(8)→38(7)→47(8)→2(9)→47(9)→39(9)→30(9)→19(9)→10(9)→1(8)→46(7)→38(8)→29(7)→21(8)→12(7)→3(6)→48(5)→37(6)→28(5)→20(6)→11(5)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→29(1)→21(2)→12(1)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→19(1)→28(2)→39(1)→48(2)→3(3)→12(4)→20(3)→29(4)→37(3)→46(4)→1(5)→10(6)→21(5)→30(6)→38(5)→47(6)→2(7)→11(8)→19(7)→26(8)→39(7)→48(8)→3(9)→46(9)→37(9)→28(9)→20(9)→11(9)→2(8)→47(7)→39(8)→30(7)→19(8)→10(7)→1(6)→46(5)→38(6)→29(5)→21(6)→12(5)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2)→30(1)→19(2)→10(1)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→20(1)→29(2)→37(1)→46(2)→1(3)→10(4)→21(3)→30(4)→38(3)→47(4)→2(5)→11(6)→19(5)→28(6)→39(5)→48(6)→3(7)→12(8)→20(7)→29(8)→37(7)→46(8)→1(9)→46(9)→38(9)→29(9)→21(9)→12(9)→3(8)→48(7)→37(8)→28(7)→20(8)→11(7)→2(6)→47(5)→39(6)→30(5)→19(6)→10(5)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)。
在另一个应用场景下，仍以6极54槽的扁线电机为例，其中定子铁芯10中定子槽11的数量为54，转子的极数为6，每极每相槽数为3，每一定子槽11中槽层数N为10。定子绕组分为U相、V相和W相，每一相绕组设置的并联支路的数量均为3个。
参阅图16，图16是本申请提供的6极54槽扁线电机且槽层数为10时U相绕组的绕线示意图。
如图16所示，U相绕组的第一并联支路其串联连接经过的槽号为：1(1)→10(2)→21(1)→30(2)→38(1)→47(2)→2(3)→11(4)→19(3)→28(4)→39(3)→48(4)→3(5)→12(6)→20(5)→29(6)→37(5)→46(6)→1(7)→10(8)→21(7)→30(8)→38(7)→47(8)→2(9)→11(10)→19(9)→28(10)→39(9)→48(10)→2(10)→47(9)→39(10)→30(9)→19(10)→10(9)→1(8)→46(7)→38(8)→29(7)→21(8)→12(7)→3(6)→48(5)→37(6)→28(5)→20(6)→11(5)→2(4)→47(3)→39(4)→30(3)→19(4)→10(3)→1(2)→46(1)→38(2)→28(1)→21(2)→12(1)。
U相绕组的第二并联支路其串联连接经过的槽号为：2(1)→11(2)→19(1)→28(2)→39(1)→48(2)→3(3)→12(4)→20(3)→29(4)→37(3)→46(4)→1(5)→10(6)→21(5)→30(6)→38(5)→47(6)→2(7)→11(8)→19(7)→26(8)→39(7)→48(8)→3(9)→12(10)→20(9)→29(10)→37(9)→46(10)→3(10)→48(9)→37(10)→28(9)→20(10)→11(9)→2(8)→47(7)→39(8)→30(7)→19(8)→10(7)→1(6)→46(5)→38(6)→29(5)→21(6)→12(5)→3(4)→48(3)→37(4)→28(3)→20(4)→11(3)→2(2)→47(1)→39(2) →30(1)→19(2)→10(1)。
U相绕组的第三并联支路其串联连接经过的槽号为：3(1)→12(2)→20(1)→29(2)→37(1)→46(2)→1(3)→10(4)→21(3)→30(4)→38(3)→47(4)→2(5)→11(6)→19(5)→28(6)→39(5)→48(6)→3(7)→12(8)→20(7)→29(8)→37(7)→46(8)→1(9)→10(10)→21(9)→30(10)→36(9)→47(10)→1(10)→46(9)→38(10)→29(9)→21(10)→12(9)→3(8)→48(7)→37(8)→28(7)→20(8)→11(7)→2(6)→47(5)→39(6)→30(5)→19(6)→10(5)→1(4)→46(3)→38(4)→29(3)→21(4)→12(3)→3(2)→48(1)→37(2)→28(1)→20(2)→11(1)。
请结合参照图3和图4，本申请的每一并联支路的多个发卡线圈21包括节距为s/(2p)+a的长距发卡线圈、节距为s/(2p)的整距发卡线圈和节距为s/(2p)+a-4的短距发卡线圈，a为大于等于2且小于等于4的整数。
每一并联支路中，短距发卡线圈的第一支脚211和第二支脚212分别位于第k槽层和第k+1槽层，长距发卡线圈的第一支脚211和第二支脚212分别位于第k+1槽层和第k+2槽层，整距发卡线圈的第一支脚211和第二支脚212均分布于第1槽层或第n槽层；其中k为大于等于1且小于等于n的奇数。
每相绕组的p条并联支路的电压引出线在s个定子槽内且在不同定子槽的同一槽层或相邻槽层，每相绕组的p条并联支路的中性点引出线在s个定子槽内且在不同定子槽的同一槽层或相邻槽层，以简化绕组的结构。
三相绕组的所有引出线和中性点集中分布在不同定子槽11的同一槽层或相邻槽层，通过集中并联支路的引出线和中性点位置，从而可减小绕组在轴向和径向的空间，降低扁线电机的制造难度。
因每相绕组的p条并联支路在定子铁芯10的周向上旋转对称，则同一相绕组中p条并联支路的电压引出线也在定子铁芯10的周向上旋转对称，同一相绕组中p条并联支路的中性点引出线也在定子铁芯10的周向上旋转对称，进一步地，电压引出线和中性点引出线均在同一槽层，例如，电压引出线和中性点引出线均位于第1槽层或第n槽层。
本实施例中，每相绕组中，p条并联支路的电压引出线和中性点均沿定子铁芯10的周向旋转对称，可避免环流产生。
在一实施例中，每一并联支路中发卡线圈21之间的焊接节距可以都为s/(2p)， 即其发卡线圈21之间的焊接节距与整距发卡线圈的节距相同。在一实施例中，并联支路中发卡线圈21之间的焊接节距还可以不等于整距发卡线圈的节距。
在一个实施例中，a＝3，则长距发卡线圈的节距为s/(2p)+3，整距发卡线圈的节距为s/(2p)，短距发卡线圈的节距为s/(2p)-1。在每一并联支路中该三种节距的发卡线圈同时存在，且每一并联支路的发卡线圈在不同定子槽11中遍历n个槽层，使得p条并联支路可消除因槽层位置的不同引起的电势相位差。
在上述应用场景下，短距发卡线圈的节距可以为11，整距发卡线圈的节距可以为12，长距发卡线圈的节距可以为15。
在上述应用场景下，k＝1时，并联支路在第1槽层和第2槽层之间所采用的发卡线圈为短距发卡线圈，并联支路在第2槽层和第3槽层之间所采用的发卡线圈为长距发卡线圈，依次类推可知，并联支路在第3槽层和第4槽层之间所采用的发卡线圈为短距发卡线圈，并联支路在第4槽层和第5槽层之间所采用的发卡线圈为长距发卡线圈，不再赘述；而当整距发卡线圈出现在同一槽层，其仅仅出现在第1槽层或第n槽层。其中每相绕组的绕线方式可以是波绕或叠绕。
参阅图17至图19，图17是本申请提供的扁线电机为6极72槽且槽层数为4、a为3时U相绕组第一并联支路的绕线示意图，图18为如图17所示扁线电机中U相绕组第二并联支路的绕线示意图，图19为如图17所示扁线电机中U相绕组第三并联支路的绕线示意图。
其中，实线代表插线端的接线方式，虚线代表焊接端的接线方式，U1、U2、U3可以作为电压引出线也可以作为中性点引出线，X1、X2、X3可以作为电压引出线也可以作为中性点引出线。
在上述应用场景下，m＝3，定子槽数s＝72，转子的对极数为p＝3，每极每相槽数q＝4，定子槽11的槽层数n＝4，长距发卡线圈的节距为15，整距发卡线圈的节距为12，短距发卡线圈的节距为11，并联支路中相邻发卡线圈之间的焊接节距为12，则并联支路在第1槽层和第2槽层之间所采用的发卡线圈为短距发卡线圈，并联支路在第2槽层和第3槽层之间所采用的发卡线圈为长距发卡线圈，并联支路在第3槽层和第4槽层之间所采用的发卡线圈为短距发卡线圈，整距发卡线圈出现在同一槽层，其仅仅出现在第1槽层或第4槽层，由此采用本实施例的定子绕组20只需5种类型的发卡线圈21，本实施例的定子绕组20由相位相差120度电角度的三相绕组结构。
下面结合图17、图18和图19，分别对本实施例中U相绕组中第一并列支路、第二并列支路和第三并列支路做详细说明。
其中，编号i(j)表示第i槽中的第j槽层，例如1(1)表示第1槽的第1槽层，7(2)表示第7槽的第2槽层。
如图17所示，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：1(1)→13(2)→24(1)→36(2)→47(1)→59(2)→70(1)→10(2)→25(3)→37(4)→48(3)→60(4)→71(3)→11(4)→22(3)→34(4)→22(4)→10(3)→71(4)→59(3)→48(4)→36(3)→25(4)→13(3)→70(2)→58(1)→47(2)→35(1)→24(2)→12(1)→1(2)→61(1)。
如图18所示，U相绕组的第二并联支路从电压引出线位置U2绕进从中性点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：71(1)→11(2)→22(1)→34(2)→49(3)→61(4)→72(3)→12(4)→23(3)→35(4)→46(3)→58(4)→46(4)→34(3)→23(4)→11(3)→72(4)→60(3)→49(4)→37(3)→22(2)→10(1)→71(2)→59(1)→48(2)→36(1)→25(2)→13(1)→25(1)→37(2)→48(1)→60(2)。
如图19所示，U相绕组的第三并联支路从电压引出线位置U3绕进从中性点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：72(1)→12(2)→23(1)→35(2)→46(1)→58(2)→1(3)→13(4)→24(3)→36(4)→47(3)→59(4)→70(3)→10(4)→70(4)→58(3)→47(4)→35(3)→24(4)→12(3)→1(4)→61(3)→46(2)→34(1)→23(2)→11(1)→72(2)→60(1)→49(2)→37(1)→49(1)→61(2)。
U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应1(1)，X1对应61(1)；U2对应71(1)，X2对应60(2)；U3对应72(1)，X3对应61(2)。U1、U2和U3并联，X1、X2和X3并联，最后通过汇流条连接，形成完成的U相绕组。
U相绕组、V相绕组和W相绕组对称均匀分布在定子铁芯10的圆周上，本实施例中，V相绕组和W相绕组可以由U相绕组通过沿定子铁芯10的圆周方向旋转多个定子槽11得到，在此不再赘述V相绕组和W相绕组的绕线方式。
在上述应用场景的基础上，即m＝3，定子槽数s＝72，转子的对极数为p＝3，每极每相槽数q＝4，当定子槽11的槽层数n＝6，长距发卡线圈的节距为15，整 距发卡线圈的节距为12，短距发卡线圈的节距为11，并联支路中相邻发卡线圈之间的焊接节距为12，则并联支路在第1槽层和第2槽层之间所采用的发卡线圈为短距发卡线圈，并联支路在第2槽层和第3槽层之间所采用的发卡线圈为长距发卡线圈，并联支路在第3槽层和第4槽层之间所采用的发卡线圈为短距发卡线圈，并联支路在第4槽层和第5槽层之间所采用的发卡线圈为长距发卡线圈，并联支路在第5槽层和第6槽层之间所采用的发卡线圈为短距发卡线圈，整距发卡线圈出现在同一槽层，其仅仅出现在第1槽层或第6槽层，由此采用本实施例的定子绕组20只需7种类型的发卡线圈21，本实施例的定子绕组20由相位相差120度电角度的三相绕组结构。
如图20所示，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：1(1)→13(2)→24(1)→36(2)→47(1)→59(2)→70(1)→10(2)→25(3)→37(4)→48(3)→60(4)→71(3)→11(4)→22(3)→34(4)→49(5)→61(6)→72(5)→12(6)→23(5)→35(6)→46(5)→58(6)→46(6)→34(5)→23(6)→11(5)→72(6)→60(5)→49(6)→37(5)→22(4)→10(3)→71(4)→59(3)→48(4)→36(3)→25(4)→13(3)→70(2)→58(1)→47(2)→35(1)→24(2)→12(1)→1(2)→61(1)。
如图21所示，U相绕组的第二并联支路从电压引出线位置U2绕进从中性点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：71(1)→11(2)→22(1)→34(2)→49(3)→61(4)→72(3)→12(4)→23(3)→35(4)→46(3)→58(4)→1(5)→13(6)→24(5)→36(6)→47(5)→59(6)→70(5)→10(6)→70(6)→58(5)→47(6)→35(5)→24(6)→12(5)→1(6)→61(5)→46(4)→34(3)→23(4)→11(3)→72(4)→60(3)→49(4)→37(3)→22(2)→10(1)→71(2)→59(1)→36(1)→25(2)→13(1)→25(1)→37(2)→48(1)→60(2)。
如图22所示，U相绕组的第三并联支路从电压引出线位置U3绕进从中性点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：(1)→12(2)→23(1)→35(2)→46(1)→58(2)→1(3)→13(4)→24(3)→36(4)→47(3)→59(4)→70(3)→10(4)→25(5)→37(6)→48(5)→60(6)→71(5)→11(6)→22(5)→34(6)→22(6)→10(5)→71(6)→59(5)→48(6)→36(5)→25(6)→13(5)→70(4)→58(3)→47(4) →35(3)→24(4)→12(3)→1(4)→61(3)→46(2)→34(1)→23(2)→11(1)→72(2)→60(1)→49(2)→37(1)→49(1)→61(2)。
U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应1(1)，X1对应61(1)；U2对应71(1)，X2对应60(2)；U3对应72(1)，X3对应61(2)。U1、U2和U3并联，X1、X2和X3并联，最后通过汇流条连接，形成完成的U相绕组。
在上述在应用场景的基础上，即m＝3，定子槽数s＝72，转子的对极数为p＝3，每极每相槽数q＝4，当定子槽11的槽层数n＝8时，长距发卡线圈的节距为15，整距发卡线圈的节距为12，短距发卡线圈的节距为11，由此采用本实施例的定子绕组20只需9种类型的发卡线圈21。
如图23所示，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：1(1)→13(2)→24(1)→36(2)→47(1)→59(2)→70(1)→10(2)→25(3)→37(4)→48(3)→60(4)→71(3)→11(4)→22(3)→34(4)→49(5)→61(6)→72(5)→12(6)→23(5)→35(6)→46(5)→58(6)→1(7)→13(8)→24(7)→36(8)→47(7)→59(8)→70(7)→10(8)→70(8)→58(7)→47(8)→35(7)→24(8)→12(7)→1(8)→61(7)→46(6)→34(5)→23(6)→11(5)→72(6)→60(5)→49(6)→37(5)→22(4)→10(3)→71(4)→59(3)→48(4)→36(3)→25(4)→13(3)→70(2)→58(1)→47(2)→35(1)→24(2)→12(1)→1(2)→61(1)。
如图24所示，U相绕组的第二并联支路从电压引出线位置U2绕进从中性点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：71(1)→11(2)→22(1)→34(2)→49(3)→61(4)→72(3)→12(4)→23(3)→35(4)→46(3)→58(4)→1(5)→13(6)→24(5)→36(6)→47(5)→59(6)→70(5)→10(6)→25(7)→37(8)→48(7)→60(8)→71(7)→11(8)→22(7)→34(8)→22(8)→10(7)→71(8)→59(7)→48(8)→36(7)→25(8)→13(7)→70(6)→58(5)→47(6)→35(5)→24(6)→12(5)→1(6)→61(5)→46(4)→34(3)→23(4)→11(3)→72(4)→60(3)→49(4)→37(3)→22(2)→10(1)→71(2)→59(1)→36(1)→25(2)→13(1)→25(1)→37(2)→48(1)→60(2)。
如图25所示，U相绕组的第三并联支路从电压引出线位置U3绕进从中性 点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：72(1)→12(2)→23(1)→35(2)→46(1)→58(2)→1(3)→13(4)→24(3)→36(4)→47(3)→59(4)→70(3)→10(4)→25(5)→37(6)→48(5)→60(6)→71(5)→11(6)→22(5)→34(6)→49(7)→61(8)→72(7)→12(8)→23(7)→35(8)→46(7)→58(8)→46(8)→34(7)→23(8)→11(7)→72(8)→60(7)→49(8)→37(7)→22(6)→10(5)→71(6)→59(5)→48(6)→36(5)→25(6)→13(5)→70(4)→58(3)→47(4)→35(3)→24(4)→12(3)→1(4)→61(3)→46(2)→34(1)→23(2)→11(1)→72(2)→60(1)→49(2)→37(1)→49(1)→61(2)。
U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应1(1)，X1对应61(1)；U2对应71(1)，X2对应60(2)；U3对应72(1)，X3对应61(2)。U1、U2和U3并联，X1、X2和X3并联，最后通过汇流条连接，形成完成的U相绕组。
在另一应用场景下，a＝4，则长距发卡线圈的节距为s/(2p)+4，整距发卡线圈的节距为s/(2p)，短距发卡线圈的节距也为s/(2p)，即短距发卡线圈也作为整距发卡线圈，且该短距发卡线圈(整距发卡线圈)的第一支脚211和第二支脚212分别位于第k槽层和第k+1槽层。
在上述应用场景下，定子槽数s＝6pq，定子槽11中的槽层数n为偶数，a＝4，从而在本实施例中，短距发卡线圈变更为整距发卡线圈，如图26所示，在该三相绕组的相带分布中，各奇数层的极性分布相同，各偶数层的极性分布相同且相对所述奇数层的极性分布错位一个定子槽。
本发明中每相绕组中并联支路的发卡线圈都在不同定子槽11中遍历n个槽层，且绕组的绕线方式可以为波绕或叠绕；同相绕组中某一并联支路移动一定数量的定子槽11后，与该绕组中其他并联支路重合。通过只采用长距发卡线圈和整距发卡线圈两类发卡线圈，大大地减少了需要使用的发卡线圈的种类，减少了需要制造的模具数量，降低成本，提高了加工制造效率。同时对于三相绕组的相带分布，将同相绕组中并联支路的相邻q个同极性下的槽位置向相邻极错位1个槽，使一相的等效节距小于整距节距，实现短距的效果，从而降低扁线电机的反电势谐波，提高扁线电机效率和优化车辆的NVH即噪声、振动与声振粗糙度。
在上述应用场景下，定子槽11的槽层数n可以是2、4、6、8、10等偶数， 每一相绕组包括3条并联支路，每一并联支路中发卡线圈21的节距组合为12、16，即长距发卡线圈的节距为16，整距发卡线圈的节距为12，每一并联支路中发卡线圈之间的焊接节距均为11。
在另一应用场景下，以6极72槽电机为例，m＝3，定子槽数s＝72，转子的对极数为p＝3，每极每相槽数q＝4，定子槽11的槽层数n＝4，长距发卡线圈的节距为16，整距发卡线圈的节距为12。
在上述应用场景下采用第一种绕线方式，定子绕组20中只需5中发卡线圈。
如图27所示，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：1(1)→12(2)→24(1)→35(2)→47(1)→58(2)→70(1)→9(2)→25(3)→36(4)→48(3)→59(4)→71(3)→10(4)→22(3)→33(4)→21(4)→10(3)→70(4)→59(3)→47(4)→36(3)→24(4)→13(3)→69(2)→58(1)→46(2)→35(1)→23(2)→12(1)→72(2)→61(1)。
如图28所示，U相绕组的第二并联支路从电压引出线位置U2绕进从中性点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：71(1)→10(2)→22(1)→33(2)→49(3)→60(4)→72(3)→11(4)→23(3)→34(4)→46(3)→57(4)→45(4)→34(3)→22(4)→11(3)→71(4)→60(3)→48(4)→37(3)→21(2)→10(1)→70(2)→59(1)→47(2)→36(1)→24(2)→13(1)→25(1)→36(2)→48(1)→59(2)。
如图29所示，U相绕组的第三并联支路从电压引出线位置U3绕进从中性点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：72(1)→11(2)→23(1)→34(2)→46(1)→57(2)→1(3)→12(4)→24(3)→35(4)→47(3)→58(4)→70(3)→9(4)→69(4)→58(3)→46(4)→35(3)→23(4)→12(3)→72(4)→61(3)→45(2)→34(1)→22(2)→11(1)→71(2)→60(1)→48(2)→37(1)→49(1)→60(2)。
U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应1(1)，X1对应61(1)；U2对应71(1)，X2对应59(2)；U3对应72(1)，X3对应60(2)。U1、U2和U3并联，X1、X2和X3并联，最后通过汇流条连接，形成完成的U相绕组，U1、U2和U3刚好位于相邻的q＝4个同极性的定子槽11内，X1、X2和X3也刚好位于相邻的q＝4个同极性的定子槽11内。
在上述应用场景下，还可采用第二种绕线方式，定子绕组20中只需4种发 卡线圈。
其中，U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应1(1)，X1对应61(1)；U2对应25(1)，X2对应13(1)；U3对应49(1)，X3对应37(1)。U1、U2和U3并联，X1、X2和X3并联，最后通过汇流条连接，形成完成的U相绕组，U1、U2和U3刚好相对于定子铁芯10旋转对称，都相差24个定子槽11；X1、X2和X3也刚好相对于定子铁芯10旋转对称，都相差24个定子槽11。
第二种绕线方式中，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：1(1)→12(2)→24(1)→35(2)→47(1)→58(2)→70(1)→9(2)→25(3)→36(4)→48(3)→59(4)→71(3)→10(4)→22(3)→33(4)→21(4)→10(3)→70(4)→59(3)→47(4)→36(3)→24(4)→13(3)→69(2)→58(1)→46(2)→35(1)→23(2)→12(1)→72(2)→61(1)。
U相绕组的第二并联支路从电压引出线位置U2绕进从中性点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：25(1)→36(2)→48(1)→59(2)→71(1)→10(2)→22(1)→33(2)→49(3)→60(4)→72(3)→11(4)→23(3)→34(4)→46(3)→57(4)→45(4)→34(3)→22(4)→11(3)→71(4)→60(3)→48(4)→37(3)→21(2)→10(1)→70(2)→59(1)→47(2)→36(1)→24(2)→13(1)。
U相绕组的第三并联支路从电压引出线位置U3绕进从中性点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：49(1)→60(2)→72(1)→11(2)→23(1)→34(2)→46(1)→57(2)→1(3)→12(4)→24(3)→35(4)→47(3)→58(4)→70(3)→9(4)→69(4)→58(3)→46(4)→35(3)→24(4)→12(3)→72(4)→61(3)→45(2)→34(1)→22(2)→11(1)→71(2)→60(1)→48(2)→37(1)。
以6极72槽电机为例，m＝3，定子槽数s＝72，转子的对极数为p＝3，每极每相槽数q＝4，当定子槽11的槽层数n＝6时，本实施例采用第一种绕线方式，定子绕组20中需要7中发卡线圈，U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应1(1)，X1对应61(1)；U2对应71(1)，X2对应59(2)；U3对应72(1)，X3对应60(2)。U1、U2和U3并联，X1、X2和X3并联，最后通过汇流条连接，形成完成的U相绕组，U1、U2和U3刚好 位于相邻的q＝4个同极性的定子槽11内，X1、X2和X3也刚好位于相邻的q＝4个同极性的定子槽11内。
如图30所示，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：1(1)→12(2)→24(1)→35(2)→47(1)→58(2)→70(1)→9(2)→25(3)→36(4)→48(3)→59(4)→71(3)→10(4)→22(3)→33(4)→49(5)→60(6)→72(5)→11(6)→23(5)→34(6)→46(5)→57(6)→45(6)→34(5)→22(6)→11(5)→71(6)→60(5)→48(6)→34(5)→22(6)→11(5)→71(6)→60(5)→48(6)→37(5)→21(4)→10(3)→70(4)→59(3)→47(4)→36(3)→24(4)→13(3)→69(2)→58(1)→46(2)→35(1)→23(2)→12(1)→61(1)。
如图31所示，U相绕组的第二并联支路从电压引出线位置U2绕进从中性点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：71(1)→10(2)→22(1)→33(2)→49(3)→60(4)→72(3)→11(4)→23(3)→34(4)→46(3)→57(4)→1(5)→12(6)→24(5)→35(6)→47(5)→58(6)→70(5)→9(6)→69(6)→58(5)→46(6)→35(5)→23(6)→12(5)→72(6)→61(5)→45(4)→34(3)→22(4)→11(3)→71(4)→60(3)→48(4)→37(3)→21(2)→10(1)→70(2)→59(1)→47(2)→36(1)→24(2)→13(1)→25(1)→36(2)→48(1)→59(2)。
如图32所示，U相绕组的第三并联支路从电压引出线位置U3绕进从中性点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：72(1)→11(2)→23(1)→34(2)→46(1)→57(2)→1(3)→12(4)→24(3)→35(4)→47(3)→58(4)→70(3)→9(4)→25(5)→36(6)→48(5)→59(6)→71(5)→10(6)→22(5)→33(6)→21(6)→10(5)→70(6)→59(5)→47(6)→36(5)→24(6)→13(5)→69(4)→58(3)→46(4)→35(3)→23(4)→12(3)→72(4)→61(3)→45(2)→34(1)→22(2)→11(1)→71(2)→60(1)→48(2)→37(1)→49(1)→60(2)。
而采用第二种绕线方式，定子绕组20中只需6种发卡线圈，U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应1(1)，X1对应61(1)；U2对应25(1)，X2对应13(1)；U3对应49(1)，X3对应37(1)。
第一并联支路其串联连接经过的槽号同上，不再赘述。
该第二并联支路其串联连接经过的槽号为：25(1)→36(2)→48(1)→59(2)→71(1)→10(2)→22(1)→33(2)→49(3)→60(4)→72(3)→11(4)→23(3)→34(4)→46(3)→57(4)→1(5)→12(6)→24(5)→35(6)→47(5)→58(6)→70(5)→9(6)→69(6)→58(5)→46(6)→35(5)→23(6)→12(5)→72(6)→61(5)→45(4)→34(3)→22(4)→11(3)→71(4)→60(3)→48(4)→37(3)→21(2)→10(1)→70(2)→59(1)→47(2)→36(1)→24(2)→13(1)。
该第三并联支路其串联连接经过的槽号为：49(1)→60(2)→72(1)→11(2)→23(1)→34(2)→46(1)→57(2)→1(3)→12(4)→24(3)→35(4)→47(3)→58(4)→70(3)→9(4)→25(5)→36(6)→48(5)→59(6)→71(5)→10(6)→22(5)→33(6)→21(6)→10(35)→70(6)→59(5)→47(6)→36(5)→24(6)→13(5)→69(4)→58(3)→46(4)→35(3)→23(4)→12(3)→72(4)→61(3)→45(2)→34(1)→22(2)→11(1)→71(2)→60(1)→48(2)→37(1)。
在另一个应用场景下，a＝2，则长距发卡线圈的节距为s/(2p)+2，整距发卡线圈的节距为s/(2p)，短距发卡线圈的节距为s/(2p)-2。
具体地，定子槽数s可以为72，转子极对数p为3，定子槽11的槽层数n可以为4、6、8和10中的一种，则长距发卡线圈的节距为14，整距发卡线圈的节距为12，短距发卡线圈的节距为10，即每一并联支路中发卡线圈21的节距组合为10、12、14，每一并联支路中发卡线圈之间的焊接节距均为13。
以6极72槽电机为例，m＝3，定子槽数s＝72，转子的对极数为p＝3，每极每相槽数q＝4，其中定子槽11的槽层数n＝4。
在上述应用场景下，采用第一种绕线方式，定子绕组20中只需5中发卡线圈。
如图33所示，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：72(1)→13(2)→23(1)→36(2)→46(1)→59(2)→69(1)→10(2)→24(3)→37(4)→47(3)→60(4)→70(3)→11(4)→21(3)→34(4)→22(4)→9(3)→71(4)→58(3)→48(4)→35(3)→25(4)→12(3)→70(2)→57(1)→47(2)→34(1)→24(2)→11(1)→1(2)→60(1)。
如图34所示，U相绕组的第二并联支路从电压引出线位置U2绕进从中性 点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：70(1)→11(2)→21(1)→34(2)→48(3)→61(4)→71(3)→12(4)→22(3)→35(4)→45(3)→58(4)→46(4)→33(3)→23(4)→10(3)→72(4)→59(3)→49(4)→36(3)→22(2)→9(1)→71(2)→58(1)→48(2)→35(1)→25(2)→12(1)→24(1)→37(2)→47(1)→60(2)。
如图35所示，U相绕组的第三并联支路从电压引出线位置U3绕进从中性点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：71(1)→12(2)→22(1)→35(2)→45(1)→58(2)→72(3)→13(4)→23(3)→36(4)→46(3)→59(4)→69(3)→10(4)→70(4)→57(3)→47(4)→34(3)→24(4)→11(3)→1(4)→60(3)→46(2)→33(1)→23(2)→10(1)→72(2)→59(1)→49(2)→36(1)→48(1)→61(2)。
该3条并联支路对应的起始槽和结束槽号分布如下：U1对应72(1)，X1对应60(1)；U2对应70(1)，X2对应60(2)；U3对应71(1)，X3对应61(2)。
在上述应用场景下，采用第二种绕线方式，则定子绕组20中只需4种发卡线圈。其与第一种绕线方式的不同点在于并联支路的起始槽和结束槽，其余具体绕线方式可参阅上述第一种绕线方式，不再赘述。其中，该3条并联支路对应的起始槽和结束槽号分布如下：U1对应72(1)，X1对应60(1)；U2对应24(1)，X2对应12(1)；U3对应48(1)，X3对应36(1)。
以6极72槽电机为例，m＝3，定子槽数s＝72，转子的对极数为p＝3，每极每相槽数q＝4，定子槽11的槽层数n＝6，本实施例采用第一种绕线方式，定子绕组20中需要7中发卡线圈。
如图36所示，U相绕组的第一并联支路从电压引出线位置U1绕进从中性点引出线位置X1出线，该第一并联支路其串联连接经过的槽号为：72(1)→13(2)→23(1)→36(2)→46(1)→59(2)→69(1)→10(2)→24(3)→37(4)→47(3)→60(4)→70(3)→11(4)→21(3)→34(4)→48(5)→61(6)→71(5)→12(6)→22(5)→35(6)→45(5)→58(6)→46(6)→33(5)→23(6)→10(5)→72(6)→59(5)→49(6)→36(5)→22(4)→9(3)→71(4)→58(3)→48(4)→35(3)→25(4)→12(3)→70(2)→57(1)→47(2)→34(1)→24(2)→11(1)→1(2)→60(1)。
如图37所示，U相绕组的第二并联支路从电压引出线位置U2绕进从中性 点引出线位置X2出线，该第二并联支路其串联连接经过的槽号为：70(1)→11(2)→21(1)→34(2)→48(3)→61(4)→71(3)→12(4)→22(3)→35(4)→45(3)→58(4)→72(5)→13(6)→23(5)→36(6)→46(5)→59(6)→69(5)→10(6)→70(6)→57(5)→47(6)→34(5)→24(6)→11(5)→1(6)→60(5)→46(4)→33(3)→23(4)→10(3)→72(4)→59(3)→49(4)→36(3)→22(2)→9(1)→71(2)→58(1)→48(2)→35(1)→25(2)→12(1)→24(1)→37(2)→47(1)→60(2)。
如图38所示，U相绕组的第三并联支路从电压引出线位置U3绕进从中性点引出线位置X3出线，该第三并联支路其串联连接经过的槽号为：71(1)→12(2)→22(1)→35(2)→45(1)→58(2)→72(3)→3(4)→23(3)→36(4)→46(3)→59(4)→69(3)→10(4)→24(5)→37(6)→47(5)→60(6)→70(5)→11(6)→21(5)→34(6)→22(6)→9(5)→71(6)→58(5)→48(6)→35(5)→25(6)→12(5)→70(4)→57(3)→47(4)→34(3)→24(4)→11(3)→1(4)→60(3)→46(2)→33(1)→23(2)→10(1)→72(2)→59(1)→49(2)→36(1)→48(1)→61(2)。
U相绕组中该3条并联支路对应的起始槽和结束槽序号分布如下：U1对应72(1)，X1对应60(1)；U2对应70(1)，X2对应60(2)；U3对应71(1)，X3对应61(2)。
按照本申请实施例中的绕线方式绕制成后，以6极72槽的扁线电机的峰值转矩工况点的反电势谐波含量进行对比，现有技术整距绕组电机的反电势谐波含量为4.75％，采用本申请实施例的反电势谐波含量为3.98％，相比下降了16.2％，可见本申请提供的绕线方式能降低反电势谐波，提高电机效率。
本申请的另外一方面，还提供了一种动力总成，该动力总成包括减速器和上述的扁线电机。其中，扁线电机和减速器传动连接。具体地，扁线电机的驱动轴与减速器的输入轴可通过联轴器等传动件实现传动连接，以将驱动力自扁线电机输出至减速器。
本申请的再一方面，还提供了一种车辆，该车辆包括上述的动力总成，上述的动力总成设置于车辆内，并为车辆提供运行动力。具体地，本实施例中，车辆可具体为以电能进行驱动的新能源车辆。其中，新能源车辆具体可以是混合动力电动车辆、纯电动车辆或燃料电池电动车辆等，也可以是采用超级电容器、飞轮电池或飞轮储能器等高效储能器作为电能来源的车辆。
区别于现有技术的情况，本申请公开了的定子、扁线电机、动力总成和车辆。通过每相绕组的多条并联支路在周向上旋转对称，则使得每相绕组中多个并联支路的磁场分布相同，电势平衡，因而避免了并联支路间产生的环流，从而可大幅减小高频下的附加交流铜耗，提高高速运行时的扁线电机效率，并避免了绕组局部过温，延长了扁线电机的寿命；且每一并联支路的发卡线圈在不同定子槽中遍历N个槽层，从而可消除每相绕组中多个并联支路因在定子槽中的位置引起的电势相位差，且通过对定子槽中槽层数N和对应每一并联支路在每一定子槽中占据的槽层总数的限定，以减小发卡线圈的线型种类，从而减小了扁线电机的制造模具，以降低制作成本，可有效地提高加工制造效率。
在本申请的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、机构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、机构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
以上仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (21)

  1. 一种扁线电机的定子，其中，包括：
    定子铁芯，所述定子铁芯的内壁沿其周向开均布有多个定子槽；
    定子绕组包括三相绕组，每一相绕组包括多条并联支路，所述多条并联支路在周向上旋转对称，每一所述并联支路包括用连接线连接且不同节距的多个发卡线圈，任一所述定子槽内均设有N层所述发卡线圈，每一所述并联支路的发卡线圈在不同定子槽中遍历N个槽层，所述三相绕组沿所述定子铁芯的周向依次呈周期排列设置；
    当N＝(2n+1)×2时，每一所述并联支路在每一所述定子槽占据的槽层总数组合为2n，或2n、2n-1、2n-2；
    当N＝2n×2时，每一所述并联支路在每一所述定子槽占据的槽层总数组合为2n、2n-1，或2n、2n-1、2n-2；
    当N＝2n+1时，每一所述并联支路在每一所述定子槽占据的槽层总数组合为n、n-1，或n、n-1、n-2；其中N为正整数且大于等于4，且每一所述并联支路在每一所述定子槽的槽层总数也为正整数。
  2. 根据权利要求1所述的定子，其中，
    每一所述并联支路在所述定子槽中占据的槽层总数为1时，所述一个槽层的位置为所述定子槽的第一层或第N层；
    每一所述并联支路在所述定子槽中占据的槽层总数为2时，所述2个槽层在所述定子槽中呈相邻设置，或所述2个槽层分别为所述定子槽中的第一层和第N层；
    每一所述并联支路在所述定子槽中占据的槽层总数为3时，所述3个槽层中的两个呈相邻设置，剩余一个槽层的位置为所述定子槽的第一层或第N层，且与另外两个槽层间隔四个槽层；
    每一所述并联支路在所述定子槽中占据的槽层总数为4时，所述4个槽层分为两组，每组相间隔四个槽层，每组包括相邻设置的两个槽层。
  3. 根据权利要求2所述的定子，其中，每一相绕组包括三条并联支路。
  4. 根据权利要求3所述的定子，其中，所述定子槽的数量为54或72。
  5. 根据权利要求3或4所述的定子，其中，每一所述并联支路中发卡线圈的节距组合为8、9、11、12、16。
  6. 根据权利要求3或4所述的定子，其中，每一所述并联支路在同一槽层的发卡线圈节距均为9。
  7. 根据权利要求3或4所述的定子，其中，每一所述并联支路在第一槽层或第N槽层的发卡线圈节距为8或8、11。
  8. 根据权利要求3或4所述的定子，其中，每一所述并联支路的进线端在所述槽层的第N层，出线端在所述槽层的第N-1层；或
    每一所述并联支路的进线端和出线端均在第一槽层和第N槽层。
  9. 根据权利要求3或4所述的定子，其中，每一所述并联支路中所述发卡线圈之间的焊接节距都为9或11。
  10. 根据权利要求1-4任一项所述的定子，其中，每一所述并联支路包括节距为s/(2p)+a的长距发卡线圈、节距为s/(2p)的整距发卡线圈和节距为s/(2p)+a-4的短距发卡线圈；
    其中，s为定子槽数、p为所述并联支路的条数、a为大于等于2且小于等于4的整数。
  11. 根据权利要求10所述的定子，其中，
    每一所述并联支路中，所述短距发卡线圈的第一支脚和第二支脚分别位于第k槽层和第k+1槽层，所述长距发卡线圈的第一支脚和第二支脚分别位于第k+1槽层和第k+2槽层，所述整距发卡线圈的第一支脚和第二支脚均分布于第1槽层或第n槽层；其中k为大于等于1且小于等于n的奇数。
  12. 根据权利要求11所述的定子，其中，所述扁线电机的每极每相槽数为q，每相绕组的p条并联支路的电压引出线在s个所述定子槽内且在不同所述定子槽的同一槽层或相邻槽层，每相绕组的p条并联支路的中性点引出线在s个所述定子槽内且在不同所述定子槽的同一槽层或相邻槽层。
  13. 根据权利要求11所述的定子，其中，所述电压引出线和所述中性点引出线均位于第1槽层或第n槽层。
  14. 根据权利要求12或13所述的定子，其中，每一所述并联支路中所述发卡线圈之间的焊接节距都为s/(2p)。
  15. 根据权利要求11所述的定子，其中，n为偶数，a＝4，所述短距发卡线圈为所述整距发卡线圈，在所述三相绕组的相带分布中，各奇数层的极性分布相同，各偶数层的极性分布相同且相对所述奇数层的极性分布错位一个定子槽。
  16. 根据权利要求11所述的定子，其中，所述定子槽的槽层数为4、6、8和 10中的一种，每一所述并联支路中发卡线圈的节距组合为10、12、14，每一所述并联支路中所述发卡线圈之间的焊接节距均为13。
  17. 根据权利要求1所述的定子，其中，每一所述发卡线圈包括第一支脚、第二支脚、连接段、第一弯折段和第二弯折段，所述第一支脚和所述第二支脚平行设置并分别插设于不同定子槽的槽层，所述连接段连接于所述第一支脚和所述第二支脚的一端，所述第一弯折段连接于所述第一支脚的另一端，所述第二弯折段连接于所述第二支脚的另一端，且所述第一弯折段和所述第二弯折段还均连接有焊接端。
  18. 根据权利要求17所述的定子，其中，所述第一弯折段和第二弯折段的折弯方向相同平行或呈对称设置。
  19. 一种扁线电机，其中，包括转子和如权利要求1至18任一项所述的定子，所述转子设于所述定子铁芯的内壁所围设形成的空间内。
  20. 一种动力总成，其中，包括减速器和如权利要求19所述的扁线电机，所述扁线电机与所述减速器传动连接。
  21. 一种车辆，其中，包括如权利要求20所述的动力总成。
PCT/CN2023/091893 2022-07-06 2023-04-28 定子、扁线电机、动力总成和车辆 Ceased WO2024007713A1 (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118473124A (zh) * 2024-06-11 2024-08-09 无锡元为新能源科技有限公司 一种电机定子绕组、电机定子及电机
CN119051318A (zh) * 2024-11-01 2024-11-29 东方电气集团东方电机有限公司 二百六十四槽二十二极对称四支路双层三相绕组的接线方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111478465A (zh) * 2020-05-26 2020-07-31 上海威迈斯新能源有限公司 扁线定子组件及电机
CN112583166A (zh) * 2020-11-26 2021-03-30 天津市松正电动汽车技术股份有限公司 电机定子绕组及使用其的定子、电机
CN212850004U (zh) * 2020-07-15 2021-03-30 华为技术有限公司 定子组件、电机及电动汽车
WO2021134387A1 (zh) * 2019-12-31 2021-07-08 上海汽车集团股份有限公司 定子绕组结构和包括定子绕组结构的电机
JP2021145522A (ja) * 2020-03-13 2021-09-24 株式会社明電舎 ステータ、回転機、及び分布巻ステータの製造方法
CN114583863A (zh) * 2021-12-31 2022-06-03 华为数字能源技术有限公司 定子、扁线电机、动力总成和车辆
CN115765254A (zh) * 2022-10-10 2023-03-07 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆
CN115955032A (zh) * 2022-07-06 2023-04-11 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆
CN218920102U (zh) * 2022-10-10 2023-04-25 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆
CN218920101U (zh) * 2022-07-22 2023-04-25 浙江凌昇动力科技有限公司 车辆、动力总成、扁线电机及其定子

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9379586B2 (en) * 2013-04-24 2016-06-28 GM Global Technology Operations LLC Bar wound stator winding layout with long-pitched and short-pitched coils
WO2016104262A1 (ja) * 2014-12-26 2016-06-30 日立オートモティブシステムズ株式会社 回転電機、および、その回転電機を備えた車両
CN216356132U (zh) * 2021-08-11 2022-04-19 华为数字能源技术有限公司 电机定子、电机以及车辆
CN114204708B (zh) * 2021-10-30 2023-04-07 华为数字能源技术有限公司 定子、扁线电机、动力总成和车辆

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021134387A1 (zh) * 2019-12-31 2021-07-08 上海汽车集团股份有限公司 定子绕组结构和包括定子绕组结构的电机
JP2021145522A (ja) * 2020-03-13 2021-09-24 株式会社明電舎 ステータ、回転機、及び分布巻ステータの製造方法
CN111478465A (zh) * 2020-05-26 2020-07-31 上海威迈斯新能源有限公司 扁线定子组件及电机
CN212850004U (zh) * 2020-07-15 2021-03-30 华为技术有限公司 定子组件、电机及电动汽车
CN112583166A (zh) * 2020-11-26 2021-03-30 天津市松正电动汽车技术股份有限公司 电机定子绕组及使用其的定子、电机
CN114583863A (zh) * 2021-12-31 2022-06-03 华为数字能源技术有限公司 定子、扁线电机、动力总成和车辆
CN115955032A (zh) * 2022-07-06 2023-04-11 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆
CN218920101U (zh) * 2022-07-22 2023-04-25 浙江凌昇动力科技有限公司 车辆、动力总成、扁线电机及其定子
CN115765254A (zh) * 2022-10-10 2023-03-07 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆
CN218920102U (zh) * 2022-10-10 2023-04-25 浙江凌昇动力科技有限公司 定子、扁线电机、动力总成和车辆

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4554059A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118473124A (zh) * 2024-06-11 2024-08-09 无锡元为新能源科技有限公司 一种电机定子绕组、电机定子及电机
CN119051318A (zh) * 2024-11-01 2024-11-29 东方电气集团东方电机有限公司 二百六十四槽二十二极对称四支路双层三相绕组的接线方法

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