WO2024037268A1 - 轴向电机转子、轴向电机、动力总成及电动设备 - Google Patents
轴向电机转子、轴向电机、动力总成及电动设备 Download PDFInfo
- Publication number
- WO2024037268A1 WO2024037268A1 PCT/CN2023/107856 CN2023107856W WO2024037268A1 WO 2024037268 A1 WO2024037268 A1 WO 2024037268A1 CN 2023107856 W CN2023107856 W CN 2023107856W WO 2024037268 A1 WO2024037268 A1 WO 2024037268A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic pole
- rotor
- back plate
- fixing
- magnetic
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2798—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/92—Hybrid vehicles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
Definitions
- This application relates to the field of motor technology, and in particular to an axial motor rotor, axial motor, power assembly and electric equipment.
- axial magnetic field permanent magnet motors Compared with traditional radial magnetic field permanent magnet motors, axial magnetic field permanent magnet motors have significant advantages such as compact structure, high torque density, and high efficiency.
- the axial magnetic field permanent magnet motor has a low speed in practical applications, and its structure is mostly surface-mounted. As the operating frequency of the rotor increases, the eddy current loss of the traditional surface-mounted permanent magnet rotor structure increases. A significant increase will cause the performance of the motor to decline. At the same time, the reluctance torque component of the rotor is small, and the power drops quickly at high speeds. Considering the structural strength and the need to maintain high power at high speeds, the iron core of the rotor is made into an overall annular structure.
- the ring-shaped core structure is generally made of rolled silicon steel sheets, and its inner ring wall is an Archimedean involute rather than a circle, causing this It is difficult for the inner and outer ring walls of the rotor core to effectively cooperate with other motor rotor structural parts through interference, making the connection between the inner ring wall of the magnet and the motor shaft unreliable and making it difficult to improve the structural strength; and if the magnet is made Sector-shaped, multiple sectors are spliced into a ring structure, which reduces the reliability of the overall magnetic steel structure.
- This application provides an axial motor rotor, an axial motor, a power assembly and electric equipment.
- the present application provides an axial motor rotor, which includes a rotor back plate, a plurality of magnetic pole units and a fixing member.
- the rotor back plate is used to be sleeved on the motor shaft of the axial motor.
- the rotor back plate is provided with There are back plate fixing holes; the plurality of magnetic pole units are located on one side of the rotor back plate along the axial direction of the rotor back plate, and are arranged sequentially along the circumferential direction of the rotor back plate; the plurality of magnetic pole units At least part of the magnetic pole unit of the unit is provided with a magnetic pole fixing hole; the fixing piece is inserted into the magnetic pole fixing hole and the back plate fixing hole to secure the rotor back plate, the magnetic pole unit and the Fasteners fixed.
- the magnetic pole unit is located on the side of the rotor back plate facing the stator.
- Multiple magnetic pole units are arranged sequentially around the axial direction of the rotor back plate to form an annular magnet structure.
- Each magnetic pole unit only occupies a part of the annular magnet structure.
- the magnet structure formed by multiple magnetic pole units surrounding and spliced together is simpler to process.
- the inner wall of the overall annular magnet structure needs to be processed into a circle to be better installed with the motor shaft. However, it is generally difficult to process into a circle, and the process accuracy is difficult to achieve.
- each magnetic pole unit has arc shapes.
- the size of the magnetic pole units can be the same. After the magnetic pole units are processed, multiple magnetic pole units are spliced around the side of the rotor back plate facing the stator. It can be seen from this that the annular magnet structure in which multiple magnetic pole units are arranged sequentially around the axial direction of the rotor backplate in this application is easier to process and has higher processing accuracy, which is conducive to improving the reliability of the axial motor.
- fixing pieces are used to penetrate the magnetic pole unit and the rotor back plate to fix the magnetic pole unit and the rotor back plate.
- the filling amount of magnets in the circumferential direction of the axial motor rotor improves the magnetic performance of the axial motor rotor; and there is no need to install fixed parts between two adjacent magnetic pole units, which can reduce the magnetic field lines of the magnetic pole unit from between the two adjacent magnetic pole units. Risk of magnetic flux leakage between fixed parts.
- the axial motor rotor is arranged by surrounding multiple magnetic pole units.
- Each magnetic pole unit is part of an annular magnet structure. Compared with a magnet structure that is entirely annular, the processing technology of each magnetic pole unit is simpler; And the fixing piece is penetrated into the magnetic pole unit and the rotor back plate to fix the magnetic pole unit and the rotor back plate, thereby improving the connection stability between the magnetic pole unit and the rotor back plate.
- the magnetic pole fixing holes penetrate two axially opposite surfaces of the magnetic pole unit along the rotor back plate
- the fixing member includes a fixing member body and a fixing cap that are connected to each other, so The fixing cap is provided at one end of the fixing piece away from the rotor back plate, and the radial size of the fixing cap is greater than the radial size of the fixing body
- the magnetic pole fixing hole includes a magnetic pole fixing hole body and a magnetic pole fixing hole body located on the The main body of the magnetic pole fixing hole is away from the magnetic pole fixing groove at one end of the rotor back plate, and the magnetic pole fixing groove is connected with the main body of the magnetic pole fixing hole,
- the radial size of the magnetic pole fixing groove is larger than the radial size of the magnetic pole fixing hole main body, the fixing piece main body is penetrated in the magnetic pole fixing hole main body and the back plate fixing hole, and the fixing cap is located The magnetic pole fixing groove is in contact with the groove bottom of the magnetic pole fixing groove.
- some of the fixing pieces located in the rotor back plate are threadedly connected to the inner wall of the back plate fixing hole.
- the peripheral surface of the end of the main body of the fixing piece close to the rotor back plate has threads, and the fixing hole of the back plate is provided with threads.
- the magnetic pole fixing holes penetrate two opposite surfaces of the magnetic pole unit along the axial direction of the rotor back plate
- the fixing member includes a fixing member main body and a fixing nut
- the magnetic pole fixing The hole includes a main body of the magnetic pole fixing hole and a magnetic pole fixing groove located at an end of the main body of the magnetic pole fixing hole away from the rotor back plate.
- the magnetic pole fixing groove is connected with the main body of the magnetic pole fixing hole.
- the diameter of the magnetic pole fixing groove is The radial size is larger than the radial size of the main body of the magnetic pole fixing hole, the main body of the fixing piece is penetrated in the fixing hole of the magnetic pole and the fixing hole of the back plate, and the end of the main body of the fixing piece is away from the rotor back plate.
- the fixing nut Extending into the magnetic pole fixing groove, the fixing nut is located in the magnetic pole fixing groove, and the fixing nut is sleeved on the end of the fixing piece body away from the rotor back plate and connected with the fixing piece.
- One end of the main body away from the rotor backplate is threaded.
- threads are provided on the circumferential surface of the end of the fixation body away from the rotor back plate, and the fixing nut is threadedly connected to the end of the fixation body away from the rotor back plate to fixedly connect the magnetic pole unit to the rotor back plate.
- the magnetic pole fixing holes penetrate two opposite surfaces of the magnetic pole unit along the axial direction of the rotor back plate
- the fixing component includes a fixing component body and a fixing cap that are connected to each other.
- the fixing cap is disposed on the fixing component body away from the rotor.
- the radial size of the fixing cap is larger than the radial size of the fixing body.
- the fixing body passes through the magnetic pole fixing hole and the back plate fixing hole.
- the fixing cap is located on the surface of the magnetic pole unit away from the rotor back plate and is in contact with the magnetic pole. The surface contact of the unit facing away from the rotor backing plate.
- the fixed cap is located on the surface of the magnetic pole unit facing away from the rotor back plate.
- the back plate fixing hole penetrates two opposite surfaces of the rotor back plate along the axial direction of the rotor back plate, and the fixing member is located adjacent to one end of the rotor back plate. It extends into the back plate fixing hole or through the back plate fixing hole to outside the back plate fixing hole.
- nuts can also be used to fix part of the fixing piece outside the back plate fixing hole.
- the cover plate can be axially oriented toward the motor rotor. A groove is provided on one side of the cover to accommodate some of the fixing pieces that pass through the outer side of the back panel fixing hole to make the cover flat.
- the surface of the magnetic pole unit facing the rotor back plate is provided with a magnetic pole positioning protrusion
- the surface of the rotor back plate facing the magnetic pole unit is provided with a back plate positioning groove
- the The magnetic pole positioning protrusion is located in the positioning groove of the back plate.
- the magnetic pole positioning protrusions cooperate with the back plate positioning grooves to realize the positioning of the magnetic pole unit and the rotor back plate, thereby improving installation efficiency and accuracy.
- One of the magnetic pole positioning protrusions and the back plate positioning groove are called a pair of positioning parts. In one implementation, the number of positioning parts may be one pair or more than two pairs.
- the two pairs of positioning components when there are two pairs of positioning components, can be arranged in the radial direction or along the circumferential direction of the rotor back plate. In other implementations, when there are two pairs or more of positioning components, the positioning components The arrangement can be set as needed.
- the magnetic pole positioning protrusion is arranged around the circumference of the magnetic pole fixing hole, and a magnetic pole positioning through hole is provided in the magnetic pole positioning protrusion.
- the magnetic pole positioning through hole is connected to the magnetic pole positioning through hole.
- the fixing holes are connected, and the back plate positioning groove is arranged around the circumference of the back plate fixing hole.
- the fixing piece passes through the magnetic pole fixing hole, the magnetic pole positioning through hole, and the back plate fixing hole in sequence.
- the backplate positioning groove is connected to the backplate fixing hole.
- the radial size of the end of the backplate fixing hole close to the magnetic pole unit can also be set larger to accommodate the magnetic pole positioning protrusion. department.
- the magnetic pole positioning protrusions are arranged around the circumference of the magnetic pole fixing hole, which can save the position of the magnetic pole unit and avoid arranging positioning parts at different positions of the magnetic pole unit and affecting the magnetic performance of the magnetic pole unit.
- the back plate positioning groove The installation around the periphery of the back plate fixing hole can avoid setting slotted holes at different positions of the rotor back plate and ensure the structural strength of the rotor back plate.
- the surface of the magnetic pole unit facing the rotor back plate is provided with a magnetic pole positioning groove
- the surface of the rotor back plate facing the magnetic pole unit is provided with a back plate positioning protrusion.
- the back plate positioning protrusion is located in the magnetic pole positioning groove.
- a magnetic pole positioning groove is provided on the magnetic pole unit
- a back plate positioning protrusion is provided on the rotor back plate. The back plate positioning protrusion cooperates with the magnetic pole positioning groove to realize the positioning of the magnetic pole unit and the rotor back plate. Improve installation efficiency and accuracy.
- the magnetic pole positioning groove is arranged around the magnetic pole fixing hole
- the back plate positioning protrusion is arranged around the back plate fixing hole.
- the magnetic pole positioning protrusions are spaced apart from the magnetic pole fixing holes, and the back plate positioning grooves are spaced apart from the back plate fixing holes.
- the processing flexibility of the magnetic pole positioning convex portion and the back plate positioning groove can be improved, making processing easier.
- the magnetic pole positioning groove is spaced apart from the magnetic pole fixing hole, and the back plate positioning protrusion is spaced apart from the back plate fixing hole.
- the processing flexibility of the magnetic pole positioning grooves and the back plate positioning convex parts can be improved, making processing easier.
- the magnetic pole unit includes a first soft magnet and a first permanent magnet, and at least part of the first soft magnet At least part of the first permanent magnets are stacked along the axial direction of the rotor back plate, and the magnetic pole fixing holes penetrate the first soft magnets and the first permanent magnets.
- the first soft magnetic body is conducive to the flow of magnetic force lines and provides a smooth flow path for the magnetic force lines.
- the first soft magnet is located on the side of the first permanent magnet away from the air gap, the magnetic lines of force flowing outward from the first permanent magnet can flow into the first permanent magnet in the adjacent magnetic pole unit through the first soft magnet.
- the first soft magnet is more conducive to the flow of magnetic force lines than air and can reduce magnetic flux loss.
- the circumferential size of the magnetic pole unit gradually increases from an end close to the rotor inner support portion to an end away from the rotor inner support portion. Since the inner supporting part of the rotor is located on the inner side and the outer supporting part of the rotor is located on the outer side, the circumferential size of the outer supporting part of the rotor is larger than the circumferential size of the inner supporting part of the rotor, so that the space between the outer supporting part of the rotor and the inner supporting part of the rotor is closer to the rotor. The area of the inner support portion gradually increases toward the area closer to the outer support portion of the rotor.
- the magnetic pole unit is arranged as above so that the magnetic pole unit is fan-shaped to fit the outer support portion of the rotor and the inner support of the rotor.
- the space between the two parts allows the magnetic pole unit to fill a larger area between the rotor outer support part and the rotor inner support part, making full use of the internal space of the rotor back plate to increase the area of the magnetic pole unit, improve the magnetic density, and increase the output speed. moment.
- the first permanent magnet is continuous along the radial direction of the rotor back plate. If the first permanent magnet is discontinuous along the radial direction of the rotor back plate, the permanent magnet includes three sub-magnetic pole units distributed along the radial direction.
- the permanent magnet generally has a high structural strength and is relatively difficult to process.
- the permanent magnet is magnetic steel, and the three permanent magnets It is difficult to process and align the surfaces on both sides along the circumferential direction, and the processing cost is high. If the surfaces of the three permanent magnets on both sides along the circumferential direction are not aligned, the space in the back plate groove will be wasted, reducing the filling amount of the permanent magnets.
- the three sub-magnetic pole units require three sets of stamping dies and a large amount of magnetic steel grinding tools.
- the processing accuracy is required to be high, so that The processing technology is complex.
- the first permanent magnets are continuous along the radial direction of the rotor back plate, and the continuous integral structure in the radial direction can align the surfaces of the first permanent magnets on both sides of the circumferential direction, which is not only simple to process, but also It is also beneficial to increase the volume of the magnetic pole unit and improve the magnetic density.
- the first permanent magnet is located within the first soft magnet in the projection of the first soft magnet along the axial direction of the rotor back plate.
- the arrangement in this implementation mode makes the circumferential size of the first soft magnet larger than the circumferential size of the first permanent magnet, which is beneficial to gathering magnetic flux lines and conducive to magnetic conduction.
- the area of the largest surface of the first permanent magnet is smaller than the area of the largest surface of the first soft magnet, so that most or all of the magnetic lines of force flowing out from the first permanent magnet can enter the first soft magnet and pass through The first soft magnets gather together and flow into adjacent magnetic pole units through the first soft magnets.
- the largest surface of the first soft magnet and the largest surface of the first permanent magnet both intersect perpendicularly with the axial direction of the rotor back plate.
- the magnetic pole unit further includes a second soft magnet
- the first permanent magnet includes a first main body part, a first sub-part and a second sub-part
- the first soft magnet includes a first main body part, a first sub-part and a second sub-part
- the first soft magnet includes a first main body part, a first sub-part and a second sub-part
- the first main body part and the second soft magnetic body are stacked along the axial direction of the rotor back plate
- the first sub-parts and the second sub-parts are arranged along the circumferential direction of the rotor back plate.
- a first soft magnet and a second soft magnet are respectively provided on both sides of the first permanent magnet along the axial direction, so that the magnetic lines of force on both sides of the first permanent magnet along the axial direction are gathered by the soft magnets, thereby increasing the air gap. Magnetic density.
- the arrangement of the first and second subsections is conducive to gathering the magnetic lines of force. When the first and second subsections protrude toward one side of the air gap, the magnetic lines of force converge into the winding coils on the stator. , making the air gap magnetic density waveform close to a sine wave, which can increase the output torque and reduce torque fluctuations.
- the first permanent magnet is a magnetic steel
- the circumferential size of the first main body portion gradually increases from an end close to the rotor inner support portion to an end far away from the rotor inner support portion. increase.
- the first main body part is fan-shaped, and the first main body part is also made of magnetic steel.
- the magnetic steel is fan-shaped, which can fully utilize the space in the groove of the back plate and avoid causing the size of the magnetic pole unit occupied by the magnet steel at the outer diameter to be smaller and durable. The resulting motor performance is insufficient.
- the magnets are fan-shaped, which can effectively improve the performance of the axial motor; and the magnets are built into the magnetic pole unit, which increases the reluctance torque component of the axial motor, allowing the axial motor to operate at high speeds. It can still maintain greater power.
- the magnetic pole unit further includes a second permanent magnet, and a second soft magnetic groove is provided on a surface of the second soft magnet away from the first body part.
- the second permanent magnet located in the second soft magnetic groove.
- the second permanent magnet and the first permanent magnet are used together to generate magnetic lines of force, increase magnetic flux, increase output torque, and improve motor performance.
- the magnetic pole unit further includes a third soft magnet
- the third soft magnet is located on a side of the second permanent magnet away from the rotor back plate, and the third soft magnet At most part of both sides along the circumferential direction are in contact with the second soft magnetic body.
- the third soft magnet is beneficial to introduce the magnetic lines of force generated by the second permanent magnet and the first permanent magnet into the air gap, and makes at least part of both sides of the third soft magnet along the circumferential direction contact the second soft magnet.
- An internal magnetic gap can be formed between the second soft magnet, the second permanent magnet and the third soft magnet to prevent the magnetic lines of force generated by the second permanent magnet from entering the second soft magnet through both circumferential sides of the third soft magnet.
- a portion of both sides of the third soft magnet along the axial direction are in contact with the inner wall of the second soft magnet to enhance the structural strength of the third soft magnet and the second soft magnet.
- avoid Magnetic leakage reduces the magnetic field lines entering the air gap.
- the axial motor rotor further includes a rotor inner support part and a rotor outer support part coaxially arranged, and the The rotor inner support portion is located on the inner circumferential side of the rotor back plate and protrudes toward one side of the rotor back plate relative to the rotor back plate.
- the rotor outer support portion is located on the outer circumferential side of the rotor back plate and is opposite to the rotor back plate.
- the rotor back plate protrudes toward the side, and two ends of each magnetic pole unit along the radial direction of the rotor back plate are respectively connected to the rotor inner support part and the rotor outer support part.
- the two ends of the magnetic pole unit along the radial direction of the rotor back plate are connected to the rotor inner support part and the rotor outer support part respectively, thereby improving the connection stability between the magnetic pole unit and the rotor back plate and preventing the magnetic pole unit from facing the rotor.
- the backing plate moves in radial direction.
- the rotor back plate, the rotor inner support part and the rotor outer support part enclose a back plate groove, and the plurality of magnetic pole units are located in the back plate groove, Adhesive glue is filled between the plurality of magnetic pole units and the inner wall of the back plate groove. In this implementation, adhesive glue is filled in the back plate groove to enhance the connection reliability between the magnetic pole unit and the rotor back plate, the rotor inner support part and the rotor outer support part.
- the rotor back plate, the rotor inner support part and the rotor outer support part constitute a rotor fixed sleeve, and the rotor fixed sleeve is sleeved on the motor shaft, wherein the rotor The fixed sleeve is an integrally formed structure.
- the rotor back plate, the rotor inner support part and the rotor outer support part form an integrated structure of the rotor fixing sleeve to improve the structural strength.
- the rotor back plate, the rotor inner support part and the rotor outer support part are made of non-magnetic conductive materials. In order to avoid magnetic leakage and increase the density of magnetic field lines generated by the magnetic pole unit entering the air gap.
- the axial motor rotor further includes a reinforcing ring, and the reinforcing ring is sleeved on the outside of the outer supporting part of the rotor.
- a high-strength reinforcing ring with interference is wound or pressed into the outside of the outer support part of the rotor to improve the overall strength.
- the reinforcing ring is a carbon fiber ring or a glass fiber ring.
- the axial motor rotor further includes a filling magnet, the filling magnet is filled in the inter-magnetic gap, and the The two ends of the filling magnet along the radial direction of the rotor back plate are respectively spaced apart from the rotor inner support part and the rotor outer support part.
- the spacing setting includes maintaining a physical spacing so that there is a certain distance between the inner support part of the rotor and the filling magnet, and a certain distance between the outer supporting part of the rotor and the filling magnet, or setting insulating materials at both ends of the filling magnet to avoid filling the magnet.
- the filling magnet is a soft magnetic composite magnet
- the soft magnetic composite magnet is prepared from a soft magnetic composite material.
- the soft magnetic composite material refers to a soft magnetic material formed by uniformly dispersing magnetic particles in non-magnetic materials. The two magnetic pole units provide a path for magnetic field lines to conduct.
- the present application provides an axial motor, characterized in that the axial motor includes a motor shaft, a stator and an axial motor rotor as described in any one of the above, and the stator is installed on the motor shaft. And is rotatably connected to the motor shaft.
- the axial motor rotor is installed on the motor shaft and fixedly connected to the motor shaft.
- the magnetic pole unit is located on the side of the rotor back plate facing the stator.
- the present application provides a powertrain, including a gearbox and an axial motor as described above.
- the axial motor is drivingly connected to the power input shaft of the gearbox and is used to input power to the The shaft outputs power.
- the present application provides an electric equipment, characterized in that the electric equipment includes an equipment body and an axial motor as described above, and the axial motor is installed on the equipment body; or
- the electric equipment includes an equipment body and a power assembly as described above, and the power assembly is installed on the equipment body.
- Figure 1a is an overall schematic diagram of an axial motor provided by an embodiment of the present application.
- Figure 1b is an exploded view of the axial motor provided in Figure 1a of this application;
- Figure 2 is a cross-sectional view of an axial motor provided by an embodiment of the present application.
- Figure 3 is a schematic structural diagram of a powertrain provided by an embodiment of the present application.
- Figure 4 is a schematic structural diagram of an electric equipment provided by an embodiment of the present application.
- Figure 5 is a schematic structural diagram of an axial motor rotor provided by an embodiment of the present application.
- Figure 6 is a schematic structural diagram of the magnet structure in the axial motor rotor provided by an embodiment of the present application.
- Figure 7 is a schematic structural diagram of a rotor fixing sleeve in an axial motor rotor provided by an embodiment of the present application
- Figure 8 is a schematic structural diagram of the axial motor rotor after being cut away according to an embodiment of the present application.
- Figure 9 is a partial enlarged view of part M in Figure 8 of the present application.
- Figure 10 is a schematic structural diagram of the magnetic pole unit, rotor back plate and fixing parts provided by an embodiment of the present application;
- Figure 11 is a schematic structural diagram of the magnetic pole unit, rotor back plate and fixing parts provided by an embodiment of the present application;
- Figure 12 is a schematic structural diagram of the magnetic pole unit, rotor back plate and fixing parts provided by an embodiment of the present application;
- Figure 13 is a schematic structural diagram of the magnetic pole unit, rotor back plate and fixing parts provided by an embodiment of the present application;
- Figure 14 is a schematic structural diagram of the magnetic pole unit, rotor back plate and fixing parts provided by an embodiment of the present application;
- Figure 15 is a schematic structural diagram of a rotor fixed sleeve provided by an embodiment of the present application.
- Figure 16 is a partial schematic diagram of an axial motor rotor provided by an embodiment of the present application.
- Figure 17 is a schematic structural diagram (1) of a magnetic pole unit provided by an embodiment of the present application.
- Figure 18 is a schematic structural diagram (2) of the magnetic pole unit provided by an embodiment of the present application.
- Figure 19 is an exploded view of the magnetic pole unit in Figure 17 of the present application.
- Figure 20 is a magnetic circuit diagram of an axial motor rotor provided by an embodiment of the present application.
- Figure 21 is a schematic structural diagram of a magnetic pole unit provided by an embodiment of the present application.
- Figure 22 is a schematic structural diagram of the first permanent magnet and the second permanent magnet in the magnetic pole unit provided by an embodiment of the present application;
- Figure 23 is a schematic structural diagram of a magnetic pole unit in an axial motor rotor provided by an embodiment of the present application.
- Figure 24 is a schematic structural diagram of a magnetic pole unit in an axial motor rotor provided by an embodiment of the present application.
- Figure 25 is a schematic structural diagram of a magnetic pole unit in an axial motor rotor provided by an embodiment of the present application.
- Figure 26 is a schematic structural diagram of a magnetic pole unit in an axial motor rotor provided by an embodiment of the present application.
- Soft magnetic composite material SMC, the full name is soft magnetic composite material.
- Soft magnetic composite material refers to a soft magnetic material formed by evenly dispersing magnetic particles in non-magnetic objects.
- the present application provides an axial motor rotor.
- the axial motor rotor includes a rotor back plate, a plurality of magnetic pole units and fixing parts.
- the rotor back plate is used to be sleeved on the motor shaft of the axial motor.
- the rotor back plate is provided with a back plate. Plate fixing holes; the plurality of magnetic pole units are located on one side of the rotor back plate along the axial direction of the rotor back plate, and are arranged sequentially along the circumferential direction of the rotor back plate.
- At least part of the magnetic pole units is provided with magnetic pole fixing holes; the fixing piece is penetrated in the magnetic pole fixing holes and the back plate fixing hole to secure the rotor back plate, the magnetic pole unit and the Fasteners fixed.
- the axial motor rotor provided by this application inserts a fixing piece through the magnetic pole unit and the rotor back plate to fix the magnetic pole unit and the rotor back plate, thereby improving the connection stability between the magnetic pole unit and the rotor back plate.
- Figure 1a is an overall schematic diagram of the axial motor 1 provided in an embodiment of the present application
- Figure 1b is an exploded view of the axial motor 1 provided in Figure 1a of the present application.
- the axial motor 1 includes an axial motor rotor 10, a motor shaft 11 and a stator 12.
- the stator 12 is installed on the motor shaft 11 and is rotationally connected to the motor shaft 11.
- the axial motor rotor 10 is installed on the motor shaft 11 and is fixedly connected to the motor shaft 11. .
- the generated alternating magnetic flux interacts with the permanent magnetic flux generated by the axial motor rotor 10 , causing the axial motor rotor 10 to rotate relative to the stator 12 .
- the axial motor rotor 10 is fixedly connected to the motor shaft 11 so that the motor shaft 11 rotates following the axial motor rotor 10 .
- the stator 12 is rotationally connected to the motor shaft 11 so that the motor shaft 11 can rotate relative to the stator 12 .
- the stator 12 does not move, and the axial motor rotor 10 and the motor shaft 11 rotate synchronously.
- the output end of the motor shaft 11 is used to drive external components to rotate.
- the axial motor 1 also includes a housing 13 and an end cover 14 (as shown in Figure 1b).
- the housing 13 is located outside the stator 12, and the end cover 14 is located away from the axial motor rotor 10 and the stator. 12 on one side.
- the end cover 14 is fixed to the housing 13 , and the axial motor rotor 10 is located between the end cover 14 and the stator 12 .
- the axial motor 1 includes two axial motor rotors 10 (as shown in Figure 1b).
- the two axial motor rotors 10 are both installed on the motor shaft 11 and are fixedly connected to the motor shaft 11.
- two axial motor rotors 10 are located on both sides of the stator 12 along the axial direction of the motor shaft 11 .
- the two axial motor rotors 10 improve the working efficiency of the axial motor 1 .
- the axial motor 1 includes two end covers 14. As shown in Figure 1b, the two end covers 14 and the housing 13 form a receiving space.
- the two axial motor rotors 10 and the stators 12 are located in the receiving space. Inside.
- the motor shaft 11 is provided with a bearing (not shown in the figure), and the stator 12 is sleeved on the motor shaft 11 through the bearing. On the stator 12, the stator 12 is rotatably connected to the motor shaft 11 through bearings.
- a first fixed plate (not shown in the figure) and a second fixed plate (not shown in the figure) are provided on the motor shaft 11 , wherein the first fixed plate is used to connect with one of the axial motors.
- the rotor 10 is fixedly connected, and the second fixed plate 17 is used to be fixedly connected to another axial motor rotor 10.
- the first fixed plate and the axial motor rotor 10 can be connected by screws, and the second fixed plate can be connected by screws. 17 and axial motor rotor 10.
- the motor shaft 11 includes a first motor half shaft and a second motor half shaft, where the first motor half shaft and the second motor half shaft are fixedly connected, and a third motor half shaft is provided on the first motor half shaft.
- a fixed plate, a bearing and a second fixed plate are provided on the second motor half shaft.
- the motor shaft 11 can also be a whole body, and the motor shaft 11 is provided with a first fixed plate, a bearing and a second fixed plate.
- the axial motor 1 includes an axial motor rotor 10 and a stator 12 .
- the axial motor 1 includes an axial motor rotor 10 and two stators 12 .
- the two stators 12 are distributed on both sides of the axial motor rotor 10 along the axial direction of the motor shaft 11 .
- the axial motor 1 includes multiple axial motor rotors 10 and multiple stators 12 , and the axial motor rotors 10 and the stators 12 are alternately arranged along the axial direction of the motor shaft 11 .
- the axial motor 1 includes three axial motor rotors 10 and two stators 12 .
- the stator 12 may be a wound winding stator or a distributed winding stator.
- the wound winding stator refers to a plurality of stator cores distributed around the motor shaft 11, and windings are wound on each stator core to form a wound winding.
- the stator 12 shown in Figure 1b is a wound winding stator.
- the distributed winding stator refers to the stator core that is arranged entirely around the motor shaft 11.
- the stator core is an integral structure. The winding slots are punched on the stator core and the windings are wound in the winding slots to form distributed windings.
- Figure 2 is a cross-sectional view of the axial motor 1 provided by an embodiment of the present application.
- there is an air gap Q between the stator 12 and the axial motor rotor 10 and the magnetic field lines L generated in the axial motor rotor 10 enter the stator 12 through the air gap Q.
- the gaps between the two axial motor rotors 10 and the stators 12 form two air gaps Q.
- the axial motor 1 adopts the axial motor rotor 10 of the present application.
- the magnet structure of the axial motor rotor is formed by arranging multiple magnetic pole units around each other. Each magnetic pole unit is a part of the annular magnet structure. Compared with the whole annular magnet structure, Magnet structure, the processing technology of each magnetic pole unit is simpler; and the fixing piece is inserted through the magnetic pole unit and the rotor back plate to fix the magnetic pole unit and the rotor back plate, improving the connection stability between the magnetic pole unit and the rotor back plate.
- Figure 3 is a schematic structural diagram of a powertrain 3 provided by an embodiment of the present application.
- the powertrain 3 includes a gearbox 31 and the axial motor 10 as described above.
- the connection between the axial motor 10 and the gearbox 31 is
- the power input shaft 32 is transmission connected and used to output power to the power input shaft 32 .
- the gearbox 31 and the axial motor 10 in the powertrain 3 may be separated or integrated.
- the motor shaft 11 of the axial motor 10 is fixedly connected to the power input shaft 32 of the gearbox 31 so that the power of the axial motor 10 is transmitted to the power input shaft 32 .
- the gearbox 31 is provided with a wheel drive shaft (not shown in the figure), and the wheel drive shaft provides power to the wheels after receiving the power output by the axial motor 10 .
- a gear component is provided in the gearbox 31 to realize power transmission between the axial motor 10 and the wheel drive shaft.
- the powertrain 3 also includes an engine 33 and a generator 34.
- the engine 33 is drivingly connected to another power input shaft in the gearbox 31 for outputting to the other power input shaft.
- the generator 34 is drivingly connected to the engine 33 through the gear components in the gearbox 31 .
- the power output by the engine 33 is transmitted to the generator 34 through the gearbox 31.
- the generator 34 generates electricity and is used to store electrical energy in the power battery and charge the power battery.
- the powertrain 3 provided in Figure 3 includes an engine 33 and a generator 34.
- the powertrain 3 is a hybrid system.
- the engine 33 and the generator 34 may not be provided, and only include a shaft. to the motor 10 and the gearbox 31. At this time, the powertrain 3 is a pure electric power system.
- the powertrain 3 also includes at least one of MCU, OBC, DC-DC, PDU and BCU.
- MCU is a motor controller, and its full name in English is Motor Control Unit
- OBC is an on-board charger, and its full English name is On-Board Charger
- DC-DC is a DC converter
- PDU is a power distribution unit, and its full English name is Power Distribution Unit
- BCU It is the battery control unit, the full English name is Battery Control Unit.
- the powertrain 3 can integrate at least one of the above components as needed.
- Figure 4 is a schematic structural diagram of an electric equipment 2 provided by an embodiment of the present application.
- the electric equipment 2 includes an equipment body 21 and the axial motor 1 as described above.
- the axial motor 1 is installed on the equipment body 21.
- the electric equipment 2 includes vehicles, robots or other forms of driving equipment.
- the vehicles include electric vehicles/electric vehicles (EV for short), pure electric vehicles/battery electric vehicles (PEV/BEV for short), hybrid Hybrid Electric Vehicle (HEV for short), Range Extended Electric Vehicle (REEV for short), Plug-in Hybrid Electric Vehicle (PHEV for short), New Energy Vehicle (New Energy Vehicle) etc.
- the vehicles include passenger cars, various special operation vehicles with specific functions, such as engineering rescue vehicles, sprinkler trucks, sewage suction trucks, etc. trucks, cement mixer trucks, crane trucks, medical vehicles, etc.
- the electric equipment 2 is a vehicle.
- the electric equipment 2 also includes wheels 22.
- the wheels 22 are installed on the equipment body 21.
- the axial motor 1 is transmission connected with the wheels 22 for driving the wheels 22. to drive the vehicle.
- Figure 5 is a schematic structural diagram of the axial motor rotor 10 provided by an embodiment of the present application.
- Figure 6 is a magnet structure 200 in the axial motor rotor 10 provided by the present application.
- 7 is a schematic structural diagram of the rotor fixing sleeve 100 in the axial motor rotor 10 provided by this application
- FIG. 8 is a cross-sectioned structural schematic diagram of the axial motor rotor 10 provided by this application.
- the axial motor rotor 10 includes a rotor back plate 110 (as shown in FIG.
- the rotor back plate 110 is used to be sleeved on the motor shaft of the axial motor 1 11, the rotor back plate 110 is provided with a back plate fixing hole 101 (as shown in Figure 7); a plurality of magnetic pole units 210 are located on one side of the rotor back plate 110 along the axial direction O of the rotor back plate 110, and along the rotor back plate 110.
- the plate 110 is arranged in sequence in the circumferential direction C.
- At least some of the plurality of magnetic pole units 210 are provided with magnetic pole fixing holes 201 (as shown in FIG. 6 ); the fixing part 300 is inserted through the magnetic pole fixing holes 201 and the back plate. into the fixing holes 101 to fix the rotor back plate 110, the magnetic pole unit 210 and the fixing part 300.
- the axis of the rotor back plate 110 coincides with the axis of the motor shaft 11
- the axial direction O of the rotor back plate 110 coincides with the axial direction of the motor shaft 11
- the extension direction of the axis of the rotor back plate 110 is the rotor back.
- the axial direction O of the plate 110 wherein the radial direction R of the rotor back plate 110 is the same as the radial direction of the motor shaft 11 .
- the rotor back plate 110 has an annular structure.
- the circumferential direction C of the rotor back plate 110 refers to the circumferential direction surrounding the axial direction O of the rotor back plate 110 .
- the magnetic pole units 210 are located on the side of the rotor back plate 110 facing the stator 12 , and a plurality of magnetic pole units 210 are sequentially arranged around the axial direction O of the rotor back plate 110 to form an annular magnet structure 200 (as shown in FIG. 6 (shown), each magnetic pole unit 210 only occupies a part of the annular magnet structure 200. Compared with the entire annular magnet structure, the magnet structure 200 formed by surrounding and splicing of multiple magnetic pole units 210 is simpler to process. The overall annular magnet structure 200 needs to be sleeved on the motor shaft 11.
- the inner wall of the overall annular magnet structure 200 needs to be processed into a circle in order to be better installed with the motor shaft 11, but it is generally difficult to process it into a circle, and the process The accuracy is difficult to achieve. If the accuracy is not enough and the inner wall of the magnet structure 200 does not match the motor shaft 11, the connection reliability between the axial motor rotor 10 and the motor shaft 11 will become worse, which in turn will make the overall reliability of the axial motor 1 worse and easier. damage.
- the processing technology for each magnetic pole unit 210 is simpler.
- the two ends of each magnetic pole unit 210 along the radial direction R are arc-shaped. The arc-shaped shape is easier to process than the circular shape, and the processing accuracy is higher.
- each magnetic pole unit 210 can be the same. After the magnetic pole unit 210 is processed, multiple magnetic pole units 210 are then spliced around and spliced on the side of the rotor back plate 110 facing the stator 12 . It can be seen from this that in this application, the annular magnet structure 200 formed by a plurality of magnetic pole units 210 sequentially arranged around the axial direction O of the rotor back plate 110 is easier to process and has higher processing accuracy, which is conducive to improving the reliability of the axial motor 10 sex.
- Figure 9 is a partial enlarged view of part M in Figure 8 of the present application.
- the back plate fixing hole 101 in the rotor back plate 110 extends along the axial direction O, and the magnetic poles in the magnetic pole unit 210 are fixed.
- the hole 201 extends along the axial direction O, and the extension direction of the fixing member 300 is the same as the axial direction O, so that the fixing member 300 passes through the magnetic pole fixing hole 201 and the back plate in a direction perpendicular to the surface of the magnetic pole unit 210 or perpendicular to the surface of the rotor back plate 110
- the connection stability of the fixing part 300 with the rotor back plate 110 and the magnetic pole unit 210 can be improved to prevent the magnetic pole unit 210 from falling off the rotor back plate 110.
- the extending direction of the back plate fixing hole 101 intersects with the axial direction O
- the extending direction of the magnetic pole fixing hole 201 intersects with the axial direction O
- the extending directions of the back plate fixing hole 101 and the magnetic pole fixing hole 201 are the same. That is to say, the magnetic pole fixing hole 201 and the back plate fixing hole 101 extend in an oblique direction.
- the fixing member 300 is obliquely inserted into the rotor back plate 110 and the magnetic pole unit 210.
- the rotor back plate 110 and the magnetic pole unit 210 can also be connected and fixed. , to prevent the magnetic pole unit 210 from falling off the rotor back plate 110 .
- the fixing member 300 is a screw, a pin, or the like.
- the fixing member 300 is a screw
- the magnetic pole unit 210 is locked on the rotor back plate 110 through the screw, thereby improving the structural reliability of the magnetic pole unit 210 and the rotor back plate 110 .
- the fixing piece 300 is used to pass through the magnetic pole unit 210 and the rotor back plate 110 to fix the magnetic pole unit 210 and the rotor back plate 110.
- the space on the circumferential side of the unit 210 increases the amount of magnet filling in the circumferential direction of the axial motor rotor 10 and improves the magnetic performance of the axial motor rotor 10; and there is no need to install fixed parts between two adjacent magnetic pole units 210, which can reduce the size of the magnetic pole unit. There is a risk that the magnetic field lines 210 leak from the fixed components between two adjacent magnetic pole units 210 .
- the axial motor rotor 10 is arranged by surrounding a plurality of magnetic pole units 210.
- Each magnetic pole unit 210 is a part of the annular magnet structure 200. Compared with the entire annular magnet structure, each magnetic pole unit 210 has The processing technology is simpler; and the fixing piece 300 is penetrated into the magnetic pole unit 210 and the rotor back plate 110 to fix the magnetic pole unit 210 and the rotor back plate 110 to improve the connection stability between the magnetic pole unit 210 and the rotor back plate 110 .
- each of all the magnetic pole units 210 is provided with magnetic pole fixing holes 201
- the rotor back plate 110 is provided with the same number of back plates as the magnetic pole fixing holes 201 .
- Plate fixing holes 101, the plurality of back plate fixing holes 101 of the rotor back plate 110 are arranged in one-to-one correspondence with the plurality of magnetic pole fixing holes 201, and the axial motor rotor 10 includes the same number of fixing holes 201 as the magnetic pole fixing holes 201.
- Part 300 is used to fix each magnetic pole unit 210 on the rotor back plate 110.
- some of all the magnetic pole units 210 are provided with magnetic pole fixing holes 201 , and the rotor back plate 110 is provided with the same number of back plate fixing holes 101 as the magnetic pole fixing holes 201 and the same number of fixing holes 201 .
- the hole 201 is used to fix part of the magnetic pole unit 210 on the rotor back plate 110.
- the other part of the magnetic pole unit 210 can be fixed in other ways, such as using adhesive glue.
- one or more magnetic pole fixing holes 201 are provided on one magnetic pole unit 210 , and the corresponding part of the rotor back plate 110 of the magnetic pole unit 210 is provided with the same number of magnetic pole fixing holes 201 in the magnetic pole unit 210 .
- the back plate fixing hole 101 For example, two magnetic pole fixing holes 201 are provided on one magnetic pole unit 210, and two back plate fixing holes 101 are provided on the rotor back plate 110 corresponding to the magnetic pole unit 210, and are penetrated by two fixing members 300. In the magnetic pole fixing hole 201 and the back plate fixing hole 101, the magnetic pole unit 210 and the rotor back plate 110 are fixed.
- the number of magnetic pole fixing holes 201 in all the magnetic pole units 210 is the same, or the number of the magnetic pole fixing holes 201 in some of the magnetic pole units 210 is the same, and the number of the magnetic pole fixing holes 201 in some of the magnetic pole units 210 is different.
- the positions of the magnetic pole fixing holes 201 in all the magnetic pole units 210 are the same or different, or are partially the same and partially different, and are not limited in this application.
- the number of magnetic pole fixing holes 201 in all magnetic pole units 210 can be the same, and the position of the magnetic pole fixing holes 201 in each magnetic pole unit 210 can be the same.
- the magnetic pole fixing holes 201 penetrate two opposite surfaces of the magnetic pole unit 210 along the axial direction O of the rotor back plate 110 .
- the fixing member 300 includes an interconnected fixing member body 310 and Fixed cap 320, fixed cap 320 is provided at one end of the fixed part body 310 away from the rotor back plate 110.
- the radial size of the fixed cap 320 is larger than the radial size of the fixed part main body 310;
- the magnetic pole fixing hole 201 includes the magnetic pole fixing hole main body 2011 and is located
- the magnetic pole fixing hole main body 2011 is away from the magnetic pole fixing groove 2012 at the end of the rotor back plate 110.
- the magnetic pole fixing groove 2012 is connected with the magnetic pole fixing hole main body 2011.
- the radial size of the magnetic pole fixing groove 2012 is larger than the radial size of the magnetic pole fixing hole main body 2011.
- the fixing piece body 310 passes through the magnetic pole fixing hole body 2011 and the back plate fixing hole 101.
- the fixing cap 320 is located in the magnetic pole fixing groove 2012 and contacts the bottom of the magnetic pole fixing groove 2012.
- the fixing member 300 is a screw
- the fixing cap 320 is a screw cap.
- the magnetic pole unit 210 and the rotor back plate 110 are locked and fixedly connected through the screws, thereby improving structural reliability.
- the magnetic pole unit 210 can be prevented from being separated from the rotor back plate 110 in the upper axial direction O.
- some of the fixing members 300 located in the rotor back plate 110 are threadedly connected to the inner wall of the back plate fixing hole 101 .
- the peripheral surface of one end of the fastener body 310 close to the rotor back plate 110 has threads, and the back plate fixing hole 101 is provided with threads.
- the peripheral surface of part of the fixing piece body 310 located in the magnetic pole fixing hole body 2011 does not have threads. This is because the material of the magnetic pole unit 210 is generally relatively hard and is not easy to process.
- the screws are local Polished rod screws.
- threads can also be provided in the main body 2011 of the magnetic pole fixing hole. In this case, the screw has threads on the peripheral side of the main body.
- FIG. 10 is a schematic structural diagram of the magnetic pole unit 210 , the rotor back plate 110 and the fixing member 300 provided by an embodiment of the present application.
- the magnetic pole fixing hole 201 penetrates two opposite surfaces of the magnetic pole unit 210 along the axial direction O of the rotor back plate 110
- the fixing member 300 includes a fixing member body 310 and a fixing nut 330 ;
- the magnetic pole fixing hole 201 includes The magnetic pole fixing hole main body 2011 and the magnetic pole fixing groove 2012 located at the end of the magnetic pole fixing hole main body 2011 away from the rotor back plate 110.
- the magnetic pole fixing groove 2012 is connected with the magnetic pole fixing hole main body 2011.
- the radial size of the magnetic pole fixing groove 2012 is larger than the magnetic pole fixing groove 2012.
- the radial size of the hole body 2011, the fixing body 310 passes through the magnetic pole fixing hole body 2011 and the back plate fixing hole 101, and the end of the fixing body 310 away from the rotor back plate 110 extends into the magnetic pole fixing groove 2012, and the fixing nut 330 is located in the magnetic pole fixing groove 2012, and the fixing nut 330 is sleeved on the end of the fixing body 310 away from the rotor back plate 110 and is threadedly connected to the end of the fixing body 310 away from the rotor back plate 110.
- threads are provided on the circumferential surface of the end of the fixing body 310 away from the rotor back plate 110 , and the fixing nut 330 is threadedly connected to the end of the fixing body 310 away from the rotor back plate 110 to connect the magnetic pole unit 210 to the rotor back plate 110 .
- the rotor back plate 110 is fixedly connected.
- FIG. 11 is a schematic structural diagram of the magnetic pole unit 210 , the rotor back plate 110 and the fixing member 300 provided by an embodiment of the present application.
- the magnetic pole fixing holes 201 penetrate two opposite surfaces of the magnetic pole unit 210 along the axial direction O of the rotor back plate 110.
- the fixing member 300 includes a fixing member body 310 and a fixing cap 320 connected to each other.
- the fixing cap 320 is disposed at one end of the fixing body 310 away from the rotor back plate 110.
- the radial size of the fixing cap 320 is larger than the radial size of the fixing body 310.
- the fixing body 310 passes through the magnetic pole fixing hole 201 and the back plate fixing hole 101.
- the fixed cap 320 is located on the surface of the magnetic pole unit 210 facing away from the rotor back plate 110 and in contact with the surface of the magnetic pole unit 210 facing away from the rotor back plate 110 .
- the fixed cap 320 is located on the surface of the magnetic pole unit 210 away from the rotor back plate 110 .
- the back plate fixing hole 101 penetrates two opposite surfaces of the rotor back plate 110 along the axial direction of the rotor back plate 110 , and one end of the fixing member 300 adjacent to the rotor back plate 110 is located in the back plate fixing hole 101 (As shown in Figures 10 and 11) or extend through the back plate fixing hole 101 to outside the back plate fixing hole 101 (as shown in Figure 18).
- nuts can also be used to fix part of the fixing member 300 located outside the back plate fixing hole 101.
- the cover can be A groove is provided on the side of the plate 14 facing the axial motor rotor 10 for receiving part of the fixing member 300 that passes through the outside of the back plate fixing hole 101 to make the cover plate 14 flat.
- the surface of the magnetic pole unit 210 facing the rotor back plate 110 is provided with a magnetic pole positioning protrusion 202
- the surface of the rotor back plate 110 facing the magnetic pole unit 210 is provided with a back plate positioning groove. 102.
- the magnetic pole positioning protrusion 202 is located in the back plate positioning groove 102.
- the magnetic pole positioning protrusions 202 cooperate with the back plate positioning groove 102 to realize the positioning of the magnetic pole unit 210 and the rotor back plate 110, thereby improving the installation efficiency and accuracy.
- One of the magnetic pole positioning protrusions 202 and one back plate positioning groove 102 is called a pair of positioning parts.
- the number of positioning parts may be one pair or more than two pairs. In one embodiment, when there are two pairs of positioning components, the two pairs of positioning components may be arranged in the radial direction or along the circumferential direction C of the rotor back plate 110. In other embodiments, when there are two pairs or more of positioning components, The arrangement of positioning components can be set as needed.
- the magnetic pole positioning protrusion 202 is provided around the circumference of the magnetic pole fixing hole 201.
- the magnetic pole positioning protrusion 202 is provided with a magnetic pole positioning through hole 2021.
- the magnetic pole positioning through hole 2021 is connected to the magnetic pole positioning through hole 2021.
- the magnetic pole fixing holes 201 are connected, and the back plate positioning groove 102 is arranged around the circumference of the back plate fixing hole 101.
- the fixing member 300 passes through the magnetic pole fixing hole 201, the magnetic pole positioning through hole 2021, and the back plate fixing hole 101 in sequence.
- the back plate positioning groove 102 is connected with the back plate fixing hole 101.
- the radial size of the end of the back plate fixing hole 101 close to the magnetic pole unit 210 can also be set larger for use.
- the magnetic pole positioning protrusion 202 is accommodated.
- the magnetic pole positioning protrusions 202 are arranged around the circumference of the magnetic pole fixing hole 201, which can save the space occupied by the magnetic pole unit 210 and avoid arranging positioning parts at different positions of the magnetic pole unit 210 to affect the magnetic performance of the magnetic pole unit 210.
- the back plate positioning groove 102 is provided around the circumference of the back plate fixing hole 101, which can avoid providing slotted holes at different positions of the rotor back plate 110 and ensure the structural strength of the rotor back plate 110.
- FIG. 12 is a schematic structural diagram of the magnetic pole unit 210 , the rotor back plate 110 and the fixing member 300 provided by an embodiment of the present application.
- the surface of the magnetic pole unit 210 facing the rotor back plate 110 is provided with a magnetic pole positioning groove 203
- the surface of the rotor back plate 110 facing the magnetic pole unit 210 is provided with a back plate positioning protrusion 103.
- the portion 103 is located in the magnetic pole positioning groove 203.
- the magnetic pole positioning groove 203 is provided in the magnetic pole unit 210
- the back plate positioning protrusion 103 is provided on the rotor back plate 110.
- the back plate positioning protrusion 103 cooperates with the magnetic pole positioning groove 203 to realize the magnetic pole unit 210. Positioning with the rotor back plate 110 improves installation efficiency and accuracy.
- the magnetic pole positioning groove 203 can be disposed around the magnetic pole fixing hole 201 and the back plate positioning protrusion 103 can be disposed around the back plate fixing hole 101 .
- FIG. 13 is a schematic structural diagram of the magnetic pole unit 210 , the rotor back plate 110 and the fixing member 300 provided by an embodiment of the present application.
- the magnetic pole positioning protrusions 202 are spaced apart from the magnetic pole fixing holes 201
- the back plate positioning grooves 102 are spaced apart from the back plate fixing holes 101 .
- the shapes of the magnetic pole positioning protrusions 202 and the magnetic pole fixing holes 201 may be circular, square, triangular or sector-shaped, which are not limited here.
- FIG. 14 is a schematic structural diagram of the magnetic pole unit 210 , the rotor back plate 110 and the fixing member 300 provided by an embodiment of the present application.
- the magnetic pole positioning groove 203 is spaced apart from the magnetic pole fixing hole 201
- the back plate positioning protrusion 103 is spaced apart from the back plate fixing hole 101 .
- the shapes of the magnetic pole positioning groove 203 and the magnetic pole fixing hole 201 may be circular, square, triangular or sector-shaped, which are not limited here.
- the axial motor rotor 10 also includes a coaxially arranged rotor inner support part 120 and a rotor outer support part 130 (as shown in Figure 7).
- the support portion 120 is located on the inner circumferential side of the rotor back plate 110 and protrudes toward one side of the rotor back plate 110 .
- the rotor outer support portion is located on the outer circumferential side of the rotor back plate 110 and faces the rotor back plate 110 .
- One side protrudes, and both ends of each magnetic pole unit 210 along the radial direction R of the rotor back plate 110 are respectively connected to the rotor inner support part 120 and the rotor outer support part 130 (as shown in FIG. 8 ).
- the rotor inner support part 120 and the rotor outer support part 130 protrude towards the same side of the rotor back plate 110 relative to the rotor back plate 110 .
- the rotor inner support part 120 and the rotor outer support part 130 are opposite to the rotor back plate 110 It protrudes toward one side of the stator 12 .
- the rotor inner support part 120 and the rotor outer support part 130 are annular, and a plurality of magnetic pole units 210 are located between the rotor inner support part 120 and the rotor outer support part 130 along the radial direction R of the rotor back plate 110 .
- Each magnetic pole unit 210 The two ends are connected to the rotor inner support part 120 and the rotor outer support part 130 respectively.
- the rotor back plate 110 is sleeved on the motor shaft 11 through the rotor inner support part 120, and the rotor inner support part 120 can be fixedly connected to the motor shaft 11 through screws.
- the rotor back plate 110 , the rotor inner support part 120 and the rotor outer support part 130 constitute the rotor fixed sleeve 100 .
- the rotor fixed sleeve 100 is sleeved on the motor shaft 11 .
- the plurality of magnetic pole units 210 are located in the back plate groove 104 .
- the inner walls of the plate grooves 104 are filled with adhesive glue to enhance the connection reliability between the magnetic pole unit 210 and the rotor back plate 110 , the rotor inner support part 120 and the rotor outer support part 130 .
- the magnetic pole unit 210 and the rotor back plate 110 can be pre-fixed with adhesive glue, and then fixed with the fixing piece 300 , and finally filled with adhesive glue to enhance the structural reliability of the axial motor rotor 10 and strengthen the structure. strength.
- the rotor back plate 110, the rotor inner support part 120 and the rotor outer support part 130 are integrated structures to improve the structural strength.
- the rotor back plate 110 , the rotor inner support part 120 and the rotor outer support part 130 are made of non-magnetic conductive materials.
- the rotor fixing sleeve 100 may only include the rotor back plate 110.
- the magnetic pole unit 210 is fixed to the rotor back plate 110 through the fixing member 300.
- Adhesive glue may be disposed on the rotor back plate 110 and the magnetic pole unit 210 opposite to each other. surface to enhance structural stability.
- the rotor fixing sleeve 100 may only include the rotor back plate 110 and the rotor inner support part 120, and the magnetic pole unit 210 is bonded to the surface opposite to the rotor back plate 110 and the rotor inner support part 120 through adhesive glue, so as to Enhance structural stability.
- the rotor fixing sleeve 100 may only include the rotor back plate 110 and the rotor outer support part 130, and the magnetic pole unit 210 is bonded to the opposite surface of the rotor back plate 110 and the rotor outer support part 130 through adhesive glue, so as to Enhance structural stability.
- Figure 15 is a schematic structural diagram of the rotor fixed sleeve 100 provided by an embodiment of the present application.
- the axial motor rotor 10 also includes a reinforcing ring 500.
- the reinforcing ring 500 is sleeved on the rotor. outside of the outer support portion 130 .
- An interference high-strength reinforcing ring 500 is wound or pressed into the outer side of the rotor outer support portion 130 to improve the overall strength.
- the reinforcing ring 500 is a carbon fiber ring or a glass fiber ring.
- Figure 16 is a partial schematic diagram of the axial motor rotor 10 provided by an embodiment of the present application.
- the axial motor rotor 10 also includes filling magnets 205.
- the filling magnets 205 are filled in the inter-magnetic gap 204, and the two ends of the filling magnets 205 along the radial direction R of the rotor back plate 110 are respectively connected with the rotor inner support part 120 and the rotor outer support.
- Parts 130 are arranged at intervals.
- the spacing setting includes maintaining physical spacing, so that there is a certain distance between the rotor inner support part 120 and the filling magnet 205 , and there is a certain distance between the rotor outer support part 130 and the filling magnet 205 , or insulating materials are provided at both ends of the filling magnet 205 To prevent the filling magnet 205 from being electrically conductive with the rotor inner support part 120 and the rotor outer support part 130, thereby avoiding the increase of eddy current due to the electrical conductivity between the filling magnet 205 and the rotor inner support part 120 and the rotor outer support part 130, and reducing the magnetic field line loss of the magnetic pole unit 210 .
- the filling magnet 205 is a soft magnetic composite magnet.
- the soft magnetic composite magnet is made of a soft magnetic composite material.
- the soft magnetic composite material refers to a soft magnetic material formed by uniformly dispersing magnetic particles in non-magnetic materials. It is a phase.
- the two adjacent magnetic pole units 210 provide paths for magnetic field lines to conduct.
- Figures 17 and 18 are schematic structural diagrams of the magnetic pole unit 210 provided by an embodiment of the present application.
- Figure 19 is an exploded view of the magnetic pole unit 210 in Figure 17.
- the magnetic pole unit 210 includes a first soft magnet 211 and a first permanent magnet 212, and at least part of the first soft magnet 211 and at least part of the first permanent magnet 212 are along the axial direction O of the rotor back plate 110 They are arranged in a stack, and the magnetic pole fixing holes 201 penetrate the first soft magnet 211 and the first permanent magnet 212 .
- the first soft magnetic body 211 is conducive to the flow of magnetic force lines L and provides a smooth flow path for the magnetic force lines L. Please refer to Figure 20.
- Figure 20 is a magnetic circuit diagram of the axial motor rotor 10 provided by an embodiment of the present application.
- the first soft magnet 211 When the first soft magnet 211 is located on the side of the first permanent magnet 212 away from the air gap Q, the first permanent magnet 212 The magnetic field lines L flowing outward can flow into the first permanent magnet 212 in the adjacent magnetic pole unit 210 through the first soft magnet 211. Compared with the magnetic field lines L of the first permanent magnet 212 flowing into the connected magnetic pole unit 210 through the air.
- the first soft magnet 211 is more conducive to the circulation of magnetic field lines L than air, which can reduce magnetic flux loss.
- the two adjacent magnetic pole units 210 are a pair of magnetic pole units.
- the magnetizing directions of the first permanent magnets 212 in two adjacent magnetic pole units 210 are opposite, so that the magnetic fluxes of the two adjacent magnetic pole units 210 form a loop.
- an even number of magnetic pole units 210 are included. For example, when there are N magnetic pole units 210 , it means that the axial motor rotor 10 has N/2 pairs of magnetic pole units, where N is an even number.
- the first permanent magnet 212 is also called magnet steel. Commonly used permanent magnet materials are divided into alnico-based permanent magnet alloys, iron-chromium-cobalt-based permanent magnet alloys, permanent ferrite, and rare earth permanent magnet materials ( NdFeB (Nd2Fe14B) and composite permanent magnet materials, etc.
- the first soft magnetic body 211 is a magnet made of soft magnetic composite material.
- the circumferential size of the magnetic pole unit 210 gradually increases from an end close to the rotor inner support part 120 to an end away from the rotor inner support part 120 . Since the rotor inner support part 120 is located on the inside and the rotor outer support part 130 is on the outside, the circumferential size of the rotor outer support part 130 is larger than the circumferential size of the rotor inner support part 120 , so that the rotor outer support part 130 and the rotor inner support part 120 are The space between them gradually increases from the area close to the rotor inner support part 120 to the area close to the rotor outer support part 130.
- the magnetic pole unit 210 is arranged as above, so that the magnetic pole unit 210 is fan-shaped, so that it can Adapt the space between the rotor outer support part 130 and the rotor inner support part 120 so that the magnetic pole unit 210 fills a larger area between the rotor outer support part 130 and the rotor inner support part 120, making full use of the inside of the rotor back plate 110 space, increase the area of the magnetic pole unit 210, increase the magnetic density, and increase the output torque.
- the first permanent magnets 212 are continuous along the radial direction of the rotor back plate 110 . If the first permanent magnet 212 is discontinuous along the radial direction of the rotor back plate 110, the permanent magnet includes three sub-magnetic pole units distributed along the radial direction.
- the permanent magnet generally has a high structural strength and is relatively difficult to process.
- the permanent magnets are magnetic steel. It is difficult to process and align the surfaces of the three permanent magnets on both sides of the circumferential direction C, and the processing cost is high. If the surfaces of the three permanent magnets on both sides of the circumferential direction C are not aligned, the backing plate will be wasted.
- the space in the groove 104 reduces the filling amount of the permanent magnet, thereby reducing the performance of the axial motor 1; and the three sub-magnetic pole units require three sets of stamping dies, and the amount of magnetic steel grinding tools is large, and in order to ensure the three sub-magnetic pole units
- the coaxiality of the inner and outer arc walls requires high processing accuracy, making the processing process complicated.
- the first permanent magnets 212 are continuous along the radial direction R of the rotor back plate 110 , and the continuous and integral structure in the radial direction R can make the surfaces of the first permanent magnets 212 on both sides along the circumferential direction C Alignment is not only simple to process, but also helps increase the volume of the magnetic pole unit 210 and improve the magnetic density.
- the projection of the first permanent magnet 212 on the first soft magnet 211 along the axial direction O of the rotor back plate 110 is located within the first soft magnet 211 (as shown in FIG. 17 ).
- the arrangement in this embodiment makes the circumferential size of the first soft magnetic body 211 larger than the circumferential size of the first permanent magnet 212, which is beneficial to gathering the magnetic flux lines L and conducive to magnetic conduction.
- the area of the largest surface of the first permanent magnet 212 is smaller than the area of the largest surface of the first soft magnet 211 , so that most or all of the magnetic lines of force L flowing out from the first permanent magnet 212 can enter the first soft magnet.
- the largest surface of the first soft magnet 211 and the largest surface of the first permanent magnet 212 both intersect perpendicularly with the axial direction O of the rotor back plate 110 .
- the magnetic pole unit 210 also includes a second soft magnet 213, and the first permanent magnet 212 includes a first main body part 2121, a first sub-part 2122 and In the second sub-section 2123, the first soft magnetic body 211, the first main body part 2121 and the second soft magnetic body 213 are stacked along the axial direction O of the rotor back plate 110.
- the first sub-section 2122 and the second sub-section 2123 are arranged along the rotor back plate 110.
- the circumferential direction C of 110 is arranged on both sides of the first body part 2121 and the second soft magnetic body 213 . As shown in FIG.
- a first soft magnet 211 and a second soft magnet 213 are respectively provided on both sides of the first permanent magnet 212 along the axial direction O, so that the first permanent magnet 212 has two sides along the axial direction O.
- the magnetic field lines L on both sides are gathered by soft magnets to increase the air gap magnetic density.
- the arrangement of the first sub-section 2122 and the second sub-section 2123 is conducive to gathering the magnetic force lines L.
- the cross section of the first permanent magnet 212 is “U” shaped.
- the first permanent magnet 212 is magnetic steel, and the circumferential size of the first main body portion 2121 gradually increases from an end close to the rotor inner support portion 120 to an end away from the rotor inner support portion 120 .
- the first main body part 2121 is made into a fan shape, wherein the first main body part 2121 is also made of magnetic steel, and the magnetic steel is fan-shaped, which can make full use of the space in the back plate groove 104 and avoid causing the magnetic pole unit 210 occupied by the magnetic steel at the outer diameter. The smaller size resists insufficient motor performance.
- the magnetic steel is fan-shaped, which can effectively improve the performance of the axial motor; and the magnetic steel is built into the magnetic pole unit 210, which increases the reluctance torque component of the axial motor 1, making the shaft
- the directional motor 1 can still maintain large power under high-speed working conditions.
- the magnetization direction of the first main body part 2121 is the same as the axial direction O of the rotor back plate 110 (as shown in Figure 21), and the magnetization direction of the first sub-part 2122 and the second sub-part 2123 The direction intersects the axial direction O of the rotor back plate 110 .
- This causes the magnetic field lines L in the first part 2122 and the second part 2123 to flow in or out from the middle of the two parts, and the magnetic field lines L flowing in or out from the middle of the first part 2122 and the second part 2123 will attract the third part.
- the magnetic field lines L flowing into or out of the main body 2121 are more concentrated (as shown in Figure 21), which makes the magnetic density waveform passing through the air gap close to a sine wave, which can increase the output torque and reduce torque ripple.
- the magnetization direction of the first main body part 2121 is perpendicular to the largest surface of the first main body part 2121
- the magnetization direction of the first sub-part 2122 is perpendicular to the largest surface of the first sub-part 2122
- the second sub-part 2122 is perpendicular to the maximum surface of the first main part 2121.
- the magnetizing direction of 2123 is perpendicular to the largest surface of the second portion 2123.
- the first main body part 2121, the first sub-part 2122 and the second sub-part 2123 are independent structures, which is beneficial to processing.
- the first permanent magnet 212 is magnetic steel
- the strength of the magnetic steel is relatively high and difficult to shape.
- three independent structures are used to form the first permanent magnet in a "U" shape. 212, which is beneficial to processing.
- the magnetic pole unit 210 also includes a second permanent magnet 214, and a second soft magnetic groove 2131 is provided on the surface of the second soft magnet 213 away from the first main body part 2121.
- the two permanent magnets 214 are located in the second soft magnetic groove 2131.
- the second permanent magnet 214 and the first permanent magnet 212 are used together to generate magnetic lines of force L, increase magnetic flux, increase output torque, and improve motor performance.
- the magnetizing direction of the second permanent magnet 214 is a direction perpendicular to the largest surface of the second permanent magnet 214 , or the magnetizing direction of the second permanent magnet 214 is the axial direction O.
- the first main body part 2121 and the second permanent magnet 214 are axially magnetized permanent magnets, and the first sub-part 2122 and the second sub-part 2123 are tangentially magnetized permanent magnets.
- the first soft magnetic body 211 and the second soft magnetic body 213 are soft magnetic composite material magnets.
- Soft magnetic composite material magnets refer to magnets formed by processing soft magnetic composite materials, which can reduce high-frequency eddy current losses and increase application frequency.
- soft magnetic composite materials are easy to shape and can be processed into soft magnetic structures of required shapes.
- the second soft magnetic groove 2131 can be processed into the second soft magnetic body 213 (as shown in FIG.
- the second soft magnetic groove 2131 matches the shape of the second permanent magnet 214 so that the second permanent magnet 214 can Contained in the second soft magnetic groove 2131 , the two sides of the second permanent magnet 214 along the circumferential direction C are spaced apart by the two side walls of the second soft magnetic groove 2131, and the magnetic lines of force of the second permanent magnet 214 are transmitted into the second soft magnet 213, thereby reducing the air gap.
- Q s magnetic field lines.
- the first permanent magnet 212 and the second permanent magnet 214 are magnetic steel.
- the projection of the second permanent magnet 214 on the first body part 2121 along the axial direction O of the rotor back plate 110 is located in the first body part 2121 (as shown in FIG. 17 ).
- the second permanent magnet 214 and the first main body part 2121 are arranged as above, so that the size of the second permanent magnet 214 along the circumferential direction C is smaller than the size of the first main body part 2121 along the circumferential direction C.
- the second permanent magnet 214 When the second permanent magnet 214 is closer to the air gap Q than the first main body part 2121, the area of the magnetic force lines of the second permanent magnet 214 is smaller than the area of the magnetic force lines L of the first main body part 2121.
- the magnetic force lines L move from the first main body part 2121 to the air gap Q.
- the directions gradually converge, which is beneficial to increasing the magnetic density passing through the air gap Q.
- the maximum surface of the second permanent magnet 214 is smaller than the maximum surface of the first main body part 2121 , and the maximum surface of the second permanent magnet 214 and the maximum surface of the first main body part 2121 are both aligned with the axis of the rotor inner support part 120 Intersect towards O.
- FIG. 22 is a schematic structural diagram of the first permanent magnet 212 and the second permanent magnet 214 in the magnetic pole unit 210 provided by an embodiment of the present application.
- the arc of the second permanent magnet 214 along the circumferential direction C of the rotor back plate 110 is smaller than the arc of the first main body portion 2121 along the circumferential direction C of the rotor back plate 110 .
- the arc of the second permanent magnet 214 along the circumferential direction C is ⁇ 1
- the arc of the first main body 2121 along the circumferential direction C is ⁇ 2, where ⁇ 1 is smaller than ⁇ 2, so that the magnetic pole unit 210 is more conducive to gathering the magnetic lines of force, making the incoming The magnetic density of air gap Q is closer to a sine wave.
- the magnetic pole unit 210 also includes a third soft magnet 215.
- the third soft magnet 215 is located at a distance from the second permanent magnet 214 away from the rotor back plate 110. sides, and at most parts of both sides of the third soft magnetic body 215 along the circumferential direction C are in contact with the second soft magnetic body 213 .
- the third soft magnetic body 215 is conducive to introducing the magnetic field lines L generated by the second permanent magnet 214 and the first permanent magnet 212 into the air gap Q, and at most parts of both sides of the third soft magnetic body 215 along the circumferential direction C.
- the magnetic field lines L pass through both sides of the circumferential direction C of the third soft magnetic body 215 and enter the second soft magnetic body 213 .
- a part of both sides of the third soft magnetic body 215 along the axial direction C is in contact with the inner wall of the second soft magnetic body 213 to improve the structural strength of the third soft magnetic body 215 and the second soft magnetic body 213.
- a permanent magnet can be disposed between the third soft magnet 215 and the second soft magnet 213 , or the second permanent magnet 214 can be made into a "U"-shaped cross-sectional structure.
- the second permanent magnet 214 is surrounded by Separating the third soft magnet 215 and the second soft magnet 213 toward the two ends of C can not only improve the structural strength, but also increase the air gap magnetic density.
- At least one of the first soft magnetic body 211 , the second soft magnetic body 213 and the third soft magnetic body 215 is a soft magnetic composite material magnet.
- the first soft magnetic body 211, the second soft magnetic body 213 and the third soft magnetic body 215 are all soft magnetic composite material magnets.
- the size parameters of each part in the magnetic pole unit 210 can be adjusted as needed.
- parameters such as the thickness, radian, and radial size of the first permanent magnet 212 and the first main body 2121 can be set, and the first Parameters such as the thickness, radial size, and width of the segment 2122 and the second segment 2123, and parameters such as the thickness, radian, and radial size of the first soft magnet 211 and the second soft magnet 213 can be set to make the axial motor 1. It has better performance, such as the required amount of permanent magnets, torque output, vertical and horizontal axis inductance and other performance indicators.
- the first soft magnet 211 is provided with a first sub-hole 2111 penetrating both surfaces of the first soft magnet 211.
- the first main body portion 2121 of the first permanent magnet 212 There is a second sub-hole 2124 that penetrates both surfaces of the first main body 2121.
- the second soft magnetic body 213 is provided with a third sub-hole 2132 that penetrates both surfaces of the second soft magnet 213.
- the second permanent magnet 214 has a through-hole.
- the first sub-hole 2111, the second sub-hole 2124, the third sub-hole 2132, the fourth sub-hole 2144, and the fifth sub-hole 2151 are connected, and the first sub-hole 2111, the second sub-hole 2124, The third sub-hole 2132, the fourth sub-hole 2144 and the fifth sub-hole 2151 constitute the magnetic pole fixing hole main body 2011 in the magnetic pole fixing hole 201.
- the third soft magnetic body 215 is provided with the aforementioned magnetic poles.
- the fixing groove 2012, the magnetic pole fixing groove 2012 is connected with the fifth sub-hole 2151.
- the first main body portion 2121 and the second soft magnetic body 213 in the first soft magnet 211 and the first permanent magnet 212 are respectively provided with the same number of first sub-holes 2111, second sub-holes 2124, third sub-holes 2132, fourth sub-holes 2144, and fifth sub-holes 2151, so that A plurality of magnetic pole fixing holes 201 are formed.
- the magnetic pole fixing groove 2012 is provided on the first permanent magnet 212, the first soft magnet 211 and the first permanent magnet 212.
- the permanent magnet 212 is respectively provided with a first sub-hole 2111 and a second sub-hole 2124.
- the second sub-hole 2124 is connected with the magnetic pole fixing groove 2012.
- the first sub-hole 2111 and the second sub-hole 2124 constitute the magnetic pole fixing hole main body 2011.
- the magnetic pole fixing groove 2012 is provided on the second permanent magnet 214, and the first The soft magnet 211, the first permanent magnet 212 and the second soft magnet 213 are respectively provided with a first sub-hole 2111, a second sub-hole 2124 and a third sub-hole 2132.
- the third sub-hole 2132 is connected with the magnetic pole fixing groove 2012.
- FIG. 23 is a schematic structural diagram of the axial motor rotor 10 provided in the second embodiment of the present application.
- the magnetic pole unit 210 includes a first soft magnet 211, a first permanent magnet 212, a second soft magnet 213 and a second permanent magnet 214.
- the first soft magnet 211 , the first main body portion 2121 of the first permanent magnet 212 , the second soft magnet 213 and the second permanent magnet 214 are stacked in sequence along the axial direction O.
- the magnetic pole fixing hole 201 penetrates the first soft magnet 211 , the first main body part 2121 of the first permanent magnet 212 , the second soft magnet 213 and the second permanent magnet 214 , and the fixing member 300 penetrates the first The soft magnet 211 , the first main body portion 2121 of the first permanent magnet 212 , the second soft magnet 213 and the second permanent magnet 214 .
- the magnetic pole fixing groove 2012 is provided in the second permanent magnet.
- the first soft magnet 211, the first permanent magnet 212, the second soft magnet 213 and the second permanent magnet 214 are respectively provided with a first sub-hole 2111, a second sub-hole 2124, a third sub-hole 2132 and a third sub-hole.
- Four sub-holes 2144 are connected with the magnetic pole fixing groove 2012.
- the first sub-hole 2111, the second sub-hole 2124, the third sub-hole 2132 and the fourth sub-hole 2144 constitute the magnetic pole fixing hole main body 2011.
- FIG. 24 is a schematic structural diagram of the magnetic pole unit 210 in the axial motor rotor 10 provided by the third embodiment of the present application.
- the size of the cross section of the second permanent magnet 214 gradually decreases from the end close to the first main body part 2121 to the end far away from the first main body part 2121, wherein the second permanent magnet 214
- the cross section of the permanent magnet 214 refers to the cross section obtained by cutting the second permanent magnet 214 along the axial direction O of the rotor inner support part 120 with the same arc as the second permanent magnet 214 .
- the cross-sectional size of the second permanent magnet 214 gradually decreases from an end close to the first main body 2121 to an end far away from the first main body 2121, so that the size of the end close to the air gap Q side is smaller than the end far away from the air gap Q.
- the size of one end of the gap Q causes the magnetic field lines L to converge closer to the air gap Q side, making the air gap magnetic density waveform closer to a sine wave and increasing the air gap magnetic density.
- FIG. 25 is a schematic structural diagram of the magnetic pole unit 210 in the axial motor rotor 10 provided by the fourth embodiment of the present application.
- the second permanent magnet 214 includes a second main body part 2141, a third sub-part 2142 and a fourth sub-part 2143, and the third soft magnetic body 215 is located in the second main part 2141
- the third sub-section 2142 and the fourth sub-section 2143 are arranged on both sides of the second main body part 2141 and the third soft magnetic body 215 along the circumferential direction C of the rotor inner support part 120 .
- the third subsection 2142 and the fourth subsection 2143 in the second permanent magnet 214 protrude toward the air gap Q side relative to the second main body 2141, thereby improving the effect of gathering the magnetic force lines L, thereby making the air gap magnetically dense.
- the waveform is closer to a sine wave, improving the air gap magnetic density.
- At least one of the first soft magnetic body 211 , the second soft magnetic body 213 and the third soft magnetic body 215 is a soft magnetic composite material magnet.
- the first soft magnetic body 211, the second soft magnetic body 213 and the third soft magnetic body 215 are all soft magnetic composite material magnets.
- FIG. 26 is a schematic structural diagram of the magnetic pole unit 210 in the axial motor rotor 10 provided in the fifth embodiment of the present application.
- the magnetic pole unit 210 includes The first soft magnet 211, the first permanent magnet 212, the second soft magnet 213 and the second permanent magnet 214.
- the first soft magnet 211, the first permanent magnet 212 and the second soft magnet 213 are along the axial direction of the rotor inner support part 120 O is arranged in a stack.
- the surface of the second soft magnet 213 facing away from the first permanent magnet 212 is provided with a second soft magnetic groove 2131.
- the second permanent magnet 214 is located in the second soft magnetic groove 2131.
- the second permanent magnet 214 is located along the inner surface of the rotor.
- the projection of the axial direction O of the support part 120 on the first permanent magnet 212 is located within the first permanent magnet 212 .
- the second permanent magnet 214 is located in the second soft magnetic groove 2131 of the second soft magnet 213, and both sides of the second permanent magnet 214 along the circumferential direction C are covered by the second soft magnet 213, so that from the The magnetic lines of force flowing out of the two permanent magnets 214 along both sides of the circumferential direction C can be gathered by the second soft magnet 213, thereby increasing the air gap magnetic density.
- the projection of the second permanent magnet 214 on the first permanent magnet 212 along the axial direction O is located within the first permanent magnet 212 .
- the arc of the second permanent magnet 214 is smaller than the arc of the first permanent magnet 212 .
- a permanent magnet 212 is disposed close to the air gap Q, and the range of the magnetic field lines L generated by the second permanent magnet 214 is smaller than the range of the magnetic field lines L generated by the first permanent magnet 212, so that the magnetic field lines L of the second permanent magnet 214 are closer together, and the range of the magnetic field lines L generated by the second permanent magnet 214 is smaller.
- the more concentrated magnetic force lines L of the permanent magnet 214 will attract the magnetic force lines L generated by the first permanent magnet 212, causing the magnetic force lines L of the first permanent magnet 212 and the second permanent magnet 214 to be more concentrated, thereby causing more magnetic force lines L to enter the air gap.
- Increasing the air gap magnetic density makes the air gap magnetic density waveform closer to a sine wave, increases the output torque, and improves the performance of the axial motor 1.
- the shapes and stacking relationships of the permanent magnets and soft magnets in the magnetic pole unit 210 can be other and can be set as needed.
- the side of the magnetic pole unit 210 facing the rotor back plate 110 may be provided with magnetic pole positioning protrusions or magnetic pole positioning grooves, and The back plate positioning grooves or back plate positioning protrusions on the rotor back plate 110 cooperate to achieve pre-positioning, which will not be described again here.
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Abstract
Description
Claims (15)
- 一种轴向电机转子,其特征在于,包括:转子背板,用于套设于轴向电机的电机轴,所述转子背板设有背板固定孔;多个磁极单元,所述多个磁极单元位于所述转子背板沿所述转子背板的轴向的一侧,且沿所述转子背板的周向依次排布,所述多个磁极单元的至少部分所述磁极单元设有磁极固定孔;固定件,所述固定件穿设在所述磁极固定孔和所述背板固定孔中,以将所述转子背板、所述磁极单元和所述固定件固定。
- 根据权利要求1所述的轴向电机转子,其特征在于,所述磁极固定孔贯穿所述磁极单元沿所述转子背板的轴向相对的两个表面,所述固定件包括相互连接的固定件主体和固定帽,所述固定帽设置在所述固定件远离所述转子背板的一端,所述固定帽的径向尺寸大于所述固定件主体的径向尺寸;所述磁极固定孔包括磁极固定孔主体和位于所述磁极固定孔主体远离所述转子背板一端的磁极固定凹槽,所述磁极固定凹槽与所述磁极固定孔主体连通,所述磁极固定凹槽的径向尺寸大于所述磁极固定孔主体的径向尺寸,所述固定件主体穿设在所述磁极固定孔主体和所述背板固定孔中,所述固定帽位于所述磁极固定凹槽内且与所述磁极固定凹槽的槽底接触。
- 根据权利要求1所述的轴向电机转子,其特征在于,所述磁极固定孔贯穿所述磁极单元沿所述转子背板的轴向相对的两个表面,所述固定件包括固定件主体和固定螺母;所述磁极固定孔包括磁极固定孔主体和位于所述磁极固定孔主体远离所述转子背板一端的磁极固定凹槽,所述磁极固定凹槽与所述磁极固定孔主体连通,所述磁极固定凹槽的径向尺寸大于所述磁极固定孔主体的径向尺寸,所述固定件主体穿设在所述磁极固定孔和所述背板固定孔中,且所述固定件主体远离所述转子背板的一端延伸至所述磁极固定凹槽内,所述固定螺母位于所述磁极固定凹槽内,且所述固定螺母套设在所述固定件主体远离所述转子背板的一端并与所述固定件主体远离所述转子背板的一端螺纹连接。
- 根据权利要求1所述的轴向电机转子,其特征在于,所述背板固定孔贯穿所述转子背板沿所述转子背板的轴向相对的两个表面,所述固定件邻近所述转子背板的一端位于所述背板固定孔内或者穿过所述背板固定孔延伸至所述背板固定孔外。
- 根据权利要求1-4任一项所述的轴向电机转子,其特征在于,所述磁极单元朝向所述转子背板的表面设有磁极定位凸部,所述转子背板朝向所述磁极单元的表面设有背板定位凹槽,所述磁极定位凸部位于所述背板定位凹槽内。
- 根据权利要求5所述的轴向电机转子,其特征在于,所述磁极定位凸部环绕所述磁极固定孔的周侧设置,所述磁极定位凸部内设有磁极定位通孔,所述磁极定位通孔与所述磁极固定孔连通,所述背板定位凹槽环绕所述背板固定孔的周侧设置,所述固定件依次穿过所述磁极固定孔、所述磁极定位通孔、所述背板固定孔。
- 根据权利要求1-4任一项所述的轴向电机转子,其特征在于,所述磁极单元朝向所述转子背板的表面设有磁极定位凹槽,所述转子背板朝向所述磁极单元的表面设有背板定位凸部,所述背板定位凸部位于所述磁极定位凹槽内。
- 根据权利要求1-7任一项所述的轴向电机转子,其特征在于,所述磁极单元包括第一软磁体和第一永磁体,且至少部分所述第一软磁体和至少部分所述第一永磁体沿所述转子背板的轴向层叠设置,所述磁极固定孔贯穿所述第一软磁体和所述第一永磁体。
- 根据权利要求8所述的轴向电机转子,其特征在于,所述第一永磁体沿所述转子背板的轴向在所述第一软磁体的投影位于所述第一软磁体内。
- 根据权利要求1-9任一项所述的轴向电机转子,其特征在于,所述轴向电机转子还包括同轴设置的 转子内支撑部和转子外支撑部,所述转子内支撑部位于所述转子背板的内周侧且相对所述转子背板朝向所述转子背板的一侧突出,所述转子外支撑部位于所述转子背板的外周侧且相对所述转子背板朝向所述一侧突出,每个所述磁极单元沿所述转子背板径向的两端分别与所述转子内支撑部和所述转子外支撑部连接。
- 根据权利要求10所述的轴向电机转子,其特征在于,所述轴向电机转子还包括加强环,所述加强环套设在所述转子外支撑部的外侧。
- 根据权利要求10所述的轴向电机转子,其特征在于,相邻两个所述磁极单元之间具有磁间间隙,所述轴向电机转子还包括填充磁体,所述填充磁体填充在所述磁间间隙中,且所述填充磁体沿所述转子背板径向的两端分别与所述转子内支撑部和所述转子外支撑部间隔设置。
- 一种轴向电机,其特征在于,所述轴向电机包括电机轴、定子和如权利要求1-12任一项所述的轴向电机转子,所述定子安装于所述电机轴且与所述电机轴转动连接,所述轴向电机转子安装于所述电机轴且与所述电机轴固定连接,所述磁极单元位于所述转子背板朝向所述定子的一侧。
- 一种动力总成,其特征在于,包括变速箱和如权利要求13所述的轴向电机,所述轴向电机与所述变速箱的动力输入轴传动连接,用于向所述动力输入轴输出动力。
- 一种电动设备,其特征在于,所述电动设备包括设备本体和如权利要求13所述的轴向电机,所述轴向电机安装于所述设备本体;或者所述电动设备包括设备本体和如权利要求14所述的动力总成,所述动力总成安装于所述设备本体。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23854173.4A EP4560889A4 (en) | 2022-08-15 | 2023-07-18 | AXIAL MOTOR ROTOR, AXIAL MOTOR, POWER SUPPLY ASSEMBLY AND ELECTRICAL DEVICE |
| US19/054,002 US20250192630A1 (en) | 2022-08-15 | 2025-02-14 | Axial Motor Rotor, Axial Motor, Powertrain and Electric Device |
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| CN202210981683.8A CN115483779A (zh) | 2022-08-15 | 2022-08-15 | 轴向电机转子、轴向电机、动力总成及电动设备 |
| CN202210981683.8 | 2022-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19/054,002 Continuation US20250192630A1 (en) | 2022-08-15 | 2025-02-14 | Axial Motor Rotor, Axial Motor, Powertrain and Electric Device |
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| WO2024037268A1 true WO2024037268A1 (zh) | 2024-02-22 |
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| PCT/CN2023/107856 Ceased WO2024037268A1 (zh) | 2022-08-15 | 2023-07-18 | 轴向电机转子、轴向电机、动力总成及电动设备 |
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| US (1) | US20250192630A1 (zh) |
| EP (1) | EP4560889A4 (zh) |
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| WO (1) | WO2024037268A1 (zh) |
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| CN115483779A (zh) * | 2022-08-15 | 2022-12-16 | 华为数字能源技术有限公司 | 轴向电机转子、轴向电机、动力总成及电动设备 |
| EP4568069A1 (en) * | 2023-12-05 | 2025-06-11 | Schaeffler Technologies AG & Co. KG | Rotor connection to shaft for axial flux motor |
| US12592598B2 (en) * | 2024-03-22 | 2026-03-31 | Borgwarner Luxembourg Automotive Systems Sa | Systems for rotor including composite material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017175755A (ja) * | 2016-03-23 | 2017-09-28 | 株式会社神戸製鋼所 | アキシャルギャップ型回転電機 |
| CN108233568A (zh) * | 2016-12-15 | 2018-06-29 | 姚常勤 | 一种内嵌磁极的盘式电机转子 |
| CN215911961U (zh) * | 2021-10-09 | 2022-02-25 | 浙江盘毂动力科技有限公司 | 一种低谐波轴向磁通电机转子及电机 |
| CN115483779A (zh) * | 2022-08-15 | 2022-12-16 | 华为数字能源技术有限公司 | 轴向电机转子、轴向电机、动力总成及电动设备 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007228790A (ja) * | 2006-01-27 | 2007-09-06 | Nissan Motor Co Ltd | モータ |
| JP5576246B2 (ja) * | 2010-01-06 | 2014-08-20 | 株式会社神戸製鋼所 | アキシャルギャップ型ブラシレスモータ |
| US10594180B2 (en) * | 2017-01-31 | 2020-03-17 | Regal Beloit America, Inc. | Magnetic flux guides for electric machines |
| CN206977176U (zh) * | 2017-07-31 | 2018-02-06 | 新疆金风科技股份有限公司 | 永磁电机的转子和永磁电机 |
| CN112953043A (zh) * | 2021-04-02 | 2021-06-11 | 刘建 | 一种定子组件、转子组件及中心盘轴芯双转子电机 |
-
2022
- 2022-08-15 CN CN202210981683.8A patent/CN115483779A/zh active Pending
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2023
- 2023-07-18 EP EP23854173.4A patent/EP4560889A4/en active Pending
- 2023-07-18 WO PCT/CN2023/107856 patent/WO2024037268A1/zh not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017175755A (ja) * | 2016-03-23 | 2017-09-28 | 株式会社神戸製鋼所 | アキシャルギャップ型回転電機 |
| CN108233568A (zh) * | 2016-12-15 | 2018-06-29 | 姚常勤 | 一种内嵌磁极的盘式电机转子 |
| CN215911961U (zh) * | 2021-10-09 | 2022-02-25 | 浙江盘毂动力科技有限公司 | 一种低谐波轴向磁通电机转子及电机 |
| CN115483779A (zh) * | 2022-08-15 | 2022-12-16 | 华为数字能源技术有限公司 | 轴向电机转子、轴向电机、动力总成及电动设备 |
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| See also references of EP4560889A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4560889A1 (en) | 2025-05-28 |
| CN115483779A (zh) | 2022-12-16 |
| US20250192630A1 (en) | 2025-06-12 |
| EP4560889A4 (en) | 2025-11-19 |
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