WO2019174316A1 - 转子结构、永磁辅助同步磁阻电机及电动汽车 - Google Patents

转子结构、永磁辅助同步磁阻电机及电动汽车 Download PDF

Info

Publication number
WO2019174316A1
WO2019174316A1 PCT/CN2018/119792 CN2018119792W WO2019174316A1 WO 2019174316 A1 WO2019174316 A1 WO 2019174316A1 CN 2018119792 W CN2018119792 W CN 2018119792W WO 2019174316 A1 WO2019174316 A1 WO 2019174316A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic steel
groove
rotor
section
rotor structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/119792
Other languages
English (en)
French (fr)
Inventor
董明珠
胡余生
童童
陈彬
肖勇
卢素华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to EP18909555.7A priority Critical patent/EP3767793B1/en
Priority to US16/976,711 priority patent/US11594922B2/en
Publication of WO2019174316A1 publication Critical patent/WO2019174316A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • 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
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to the field of electrical equipment, and in particular to a rotor structure, a permanent magnet assisted synchronous reluctance motor, and an electric vehicle.
  • a space is formed between both ends of the magnet accommodating groove and the two end portions of the permanent magnet to improve the anti-demagnetization capability of the rotor.
  • only the polar arc range of the magnetic steel is given, that is, the spatial extent of the folded groove is given.
  • a magnetic isolation groove is also provided at the end of the permanent magnet, and the angle between the magnetic isolation groove and the permanent magnet and the angle between the V-shaped permanent magnets are specified.
  • the extension of the magnetic isolation groove relative to the magnetic steel is close to the center line of the pole, which is not conducive to the increase of the permanent magnet flux linkage.
  • the two V-shaped magnetic steels in the prior art form an angle of 130° to 160°, and when the number of poles is less than 6, it can be well realized, and when the number of poles is large, such as 12, each The angle of the poles is only 30 degrees, and the angle of the two V-shaped magnets is still so large that it only causes the amount of permanent magnets to drop sharply, thus affecting the output of the motor.
  • an anti-demagnetization design using a U-shaped or V-shaped permanent magnet reluctance rotor is also given.
  • the main technical point is that the magnetic isolation groove at the end of the rotor magnetic steel is trimmed.
  • the permanent magnets are also trimmed.
  • a preferred range of cut angles is defined.
  • the defined ratio of the length of the two sides of the chamfer and the range of the chamfer may be a case where the magnetic steel is thin and the chamfer angle is large, and the end of the magnetic steel is directly cut into a sharp corner.
  • the anti-demagnetization ability of the magnetic steel has a great relationship with the thickness of the magnetic steel. When the thickness of the magnetic steel is cut into the shape, the decrease in the thickness in the magnetization direction may cause serious demagnetization.
  • Some rotor magnets are made up of multiple pieces. Under the action of demagnetizing magnetic field, some pieces have a large demagnetization rate, such as more than 20%, while some pieces are small, less than 3%. In general, the overall anti-demagnetization ability depends on the single piece of anti-demagnetization of the weakest magnetic steel. Therefore, the motor in the prior art has problems such as unreasonable structure and poor anti-magnetic retreat capability.
  • the main object of the present invention is to provide a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric vehicle to solve the problem of poor anti-magnetic retraction capability of the motor in the prior art.
  • first end of the first outer magnetic steel trough section extends toward the rotating shaft hole of the rotor body, and the second end of the first outer magnetic steel trough section extends toward the outer edge of the rotor body, and the second outer magnetic layer
  • the first end of the steel groove section extends toward the shaft hole, and the second end of the second outer core steel groove section is disposed toward the outer edge of the rotor body.
  • first folding groove and the second folding groove are respectively located at two sides of the straight shaft of the rotor body, and the first end of the first folding groove communicates with the second end of the first outer magnetic steel groove segment, and the first folding The second end of the slot extends toward the outer edge of the rotor body and is gradually disposed away from the straight axis, the first end of the second folded groove communicates with the second end of the second outer magnetic steel groove segment, and the second end of the second folded groove The end extends towards the outer edge of the rotor body and is progressively disposed away from the straight axis.
  • the width of the second end of the first folded groove is smaller than the width of the first end, and/or the width of the second end of the second folded groove is smaller than the width of the first end.
  • first end of the second outer magnetic steel trough section is disposed opposite to the first end of the first outer magnetic steel trough section to form a V-shaped structure, or the first outer magnetic steel trough section is first The end is in communication with the first end of the first outer magnetic steel trough section in a U-shaped configuration.
  • the first inner layer magnetic steel groove segment includes a third folding groove, and the first end of the third folding groove communicates with the end portion of the first inner layer magnetic steel groove segment near the outer edge of the rotor body, and the third folding portion The second end of the groove extends toward the outer edge of the rotor body and gradually away from the straight axis of the rotor body;
  • the third inner magnetic steel groove segment includes a fourth folding groove, the first end of the fourth folding groove and the third inner layer of magnetic steel The end of the slot section adjacent the outer edge of the rotor body communicates with the second end of the fourth slot extending toward the outer edge of the rotor body and gradually away from the straight axis.
  • Wm1 is the width of the first outer magnetic steel trough section or the second outer magnetic steel trough section
  • Lt1 is the first or second trough
  • k1 is the first standard value.
  • Wm2 is the width of the first inner layer magnetic steel groove section or the third inner layer magnetic steel groove section
  • Lt2 is the third folding groove or the fourth folding groove
  • k2 is the second standard value.
  • Wm1/Wm2 a ⁇ (Lt1/k1/Lt2/k)+b ⁇ (L1/L2), where a is the weight of the length ratio of the magnetic bridge on the rotor structure; b is the structure of the rotor The weight of the ratio of the average length of the creases; L1 is the average thickness of the first crease and/or the second crease; L2 is the average thickness of the third crease and/or the fourth crease.
  • J1 is the minimum distance between the end of the outer permanent magnet and the outer edge of the rotor body
  • J2 is the end of the inner permanent magnet and the rotor body
  • Ns is the number of teeth of the stator teeth
  • A is between the end of the side wall of the third and fourth fold grooves near the straight axis and the hole of the shaft hole of the rotor body
  • Wt is the width of the stator teeth
  • P is the number of poles of the rotor structure.
  • the magnetic steel trough group further comprises: a third magnetic steel trough, the third magnetic steel trough is disposed adjacent to the inner magnetic steel trough, and a guide is formed between the third magnetic steel trough and the inner magnetic steel trough.
  • the magnetic channel, the third layer of the magnetic steel groove is generally U-shaped or curved.
  • the permanent magnet is made of ferrite or bonded NdFeB.
  • Wt1 is the width of the magnetic bridge formed between the groove wall of the first or second groove and the outer edge of the rotor body; Wt2 is the third or fourth groove The width of the magnetic bridge formed between the groove wall and the outer edge of the rotor body.
  • a permanent magnet assisted synchronous reluctance motor comprising a rotor structure which is the rotor structure described above.
  • the second angle formed by the geometric center line of the longitudinal direction of the first folding groove and the geometric center line of the longitudinal direction of the second folding groove is set to be larger than the first outer magnetic steel groove.
  • Figure 1 is a schematic view showing the structure of a first embodiment of a rotor structure according to the present invention
  • Figure 2 is a schematic view showing the structure of a second embodiment of a rotor structure according to the present invention.
  • Figure 3 is a schematic view showing the structure of a third embodiment of a rotor structure according to the present invention.
  • Figure 4 is a schematic view showing the structure of a fourth embodiment of a rotor structure according to the present invention.
  • Figure 5 is a schematic view showing the structure of a fifth embodiment of a rotor structure according to the present invention.
  • Fig. 6 shows a schematic structural view of a sixth embodiment of a rotor structure according to the present invention.
  • spatially relative terms such as “above”, “above”, “on top”, “above”, etc., may be used herein to describe as in the drawings.
  • the exemplary term “above” can include both “over” and "under”.
  • the device can also be positioned in other different ways (rotated 90 degrees or at other orientations) and the corresponding description of the space used herein is interpreted accordingly.
  • a rotor structure is provided in accordance with an embodiment of the present invention.
  • the rotor structure includes a rotor body 10.
  • a magnet steel groove group is disposed on the rotor body 10.
  • the magnetic steel groove group includes an outer magnetic steel groove 11.
  • the outer magnetic steel groove 11 includes a first outer magnetic steel groove section 111, a second outer magnetic steel groove section 112, a first folded groove 113, and a second folded groove 114.
  • the first outer magnetic steel trough section 111 and the second outer magnetic steel trough section 112 are disposed opposite each other in the radial direction of the rotor body 10.
  • the geometric centerline of the longitudinal direction of the first outer magnet section 111 has a first angle Z with the extension of the geometric centerline of the length of the second outer magnet section 112.
  • the first folding groove 113 communicates with the first outer magnetic steel groove section 111.
  • the second folding groove 114 communicates with the second outer magnetic steel groove segment 112, and the geometric center line of the longitudinal direction of the first folding groove 113 and the extension line of the geometric center line of the longitudinal direction of the second folding groove 114 have a second clamp.
  • the second angle formed by the geometric center line of the longitudinal direction of the first folding groove 113 and the geometric center line of the longitudinal direction of the second folding groove 114 is set to be larger than the first outer magnetic steel.
  • Flood discharge refers to the ratio of the demagnetizing magnetic field to the water of a certain potential energy.
  • the inherent magnetic field of the permanent magnet is compared to the dam.
  • the potential energy of the water accumulates to a certain extent, the inherent magnetism of the original permanent magnet will be destroyed.
  • the potential energy of the flood is discharged through other paths except the permanent magnet, and the demagnetization potential energy is all concentrated on the permanent magnet, which can effectively improve the anti-demagnetization capability.
  • the first end of the first outer magnetic steel slot section 111 extends toward the shaft hole 14 .
  • the second end of the first outer magnetic steel slot section 111 extends toward the outer edge of the rotor body 10.
  • the first end of the second outer magnetic steel trough section 112 extends toward the shaft hole 14.
  • the second end of the second outer magnetic steel trough section 112 is disposed toward the outer edge of the rotor body 10.
  • the first and second folding grooves 113 and 114 are respectively located on both sides of the straight axis d of the rotor body 10.
  • the first end of the first folded groove 113 communicates with the second end of the first outer magnetic steel groove section 111.
  • the second end of the first hinge groove 113 extends toward the outer edge of the rotor body 10 and is gradually disposed away from the straight axis.
  • the first end of the second folded groove 114 communicates with the second end of the second outer magnetic steel groove section 112, and the second end of the second folded groove 114 extends toward the outer edge of the rotor body 10 and is gradually disposed away from the straight axis. This arrangement can effectively improve the anti-magnetic retraction capability of the rotor structure.
  • the width of the second end of the first folding groove 113 is smaller than the width of the first end, or the width of the second end of the second folding groove 114 is smaller than the width of the first end.
  • this arrangement can effectively improve the anti-magnetic retraction capability of the rotor structure.
  • the first end of the second outer magnetic steel trough section 112 communicates with the first end of the first outer magnetic steel trough section 111 to form a V-shaped structure.
  • the first end of the second outer magnetic steel trough section 112 communicates with the first end of the first outer magnetic steel trough section 111 to form a U-shaped structure.
  • the magnetic steel groove group further includes an inner magnetic steel groove 12.
  • the outer magnetic steel groove 11 is disposed adjacent to the inner magnetic steel groove 12, and a magnetic conductive path is formed between the outer magnetic steel groove 11 and the inner magnetic steel groove 12.
  • the inner layer magnetic steel groove 12 includes a first inner layer magnetic steel groove section 121, a second inner layer magnetic steel groove section 122, and a third inner layer magnetic steel groove section 123 which are sequentially disposed.
  • the first inner layer magnetic steel groove section 121, the second inner layer magnetic steel groove section 122 and the third inner layer magnetic steel groove section 123 are sequentially connected to form a U-shaped structure having an opening toward the outer edge of the rotor body 10, the first inner layer The magnetic steel groove section 121, the second inner layer magnetic steel groove section 122 and the third inner layer magnetic steel groove section 123 are disposed at intervals, the first inner layer magnetic steel groove section 121, the second inner layer magnetic steel groove section 122 and A magnetic bridge is formed between two adjacent ones of the third inner layer magnetic steel groove segments 123.
  • the first inner layer magnetic steel groove section 121 further includes a third folding groove 124.
  • the first end of the third folded groove 124 communicates with the end of the first inner layer magnetic steel groove section 121 near the outer edge of the rotor body 10.
  • the second end of the third fold groove 124 extends toward the outer edge of the rotor body 10 and gradually away from the straight axis of the rotor body 10.
  • the third inner layer magnetic steel groove section 123 includes a fourth folding groove 125.
  • the first end of the fourth folded groove 125 communicates with the end of the third inner magnetic steel groove section 123 near the outer edge of the rotor body 10.
  • the second end of the fourth fold groove 125 extends toward the outer edge of the rotor body 10 and gradually away from the straight axis.
  • the rotor structure satisfies: 0.3 ⁇ Wm1 ⁇ Lt1/k1 ⁇ 0.7 ⁇ Wm1, wherein Wm1 is the first outer magnetic steel trough section 111 or the second outer magnetic steel section
  • the width of the groove segment 112, Lt1 is the length of the magnetic bridge formed between the groove wall of the first groove 113 or the second groove 114 and the outer edge of the rotor body 10.
  • K1 is the first standard value.
  • Wm2 is the width of the first inner layer magnetic steel groove section 121 or the third inner layer magnetic steel groove section 123
  • Lt2 is the third folding groove 124 or the fourth folding groove
  • the length of the magnetic bridge formed between the groove wall of 125 and the outer edge of the rotor body 10, K2 is the second standard value, 0.6 ⁇ Lt1/(Lt1/k1 + Lt2/k2) ⁇ 0.9.
  • Wm1/Wm2 a ⁇ (Lt1/k1/Lt2/k)+b ⁇ (L1/L2), where a is the weight of the length ratio of the magnetic bridge on the rotor structure, and b is the average of the groove on the rotor structure.
  • the weight of the ratio of the lengths, wherein the average length of the first folding grooves 113 may be obtained by taking n points at both ends of the folding groove in the thickness direction of the first folding groove 113 to find a line connecting each pair of points. Length (of course, the line between each pair of points can be the shortest distance between the opposite side walls), and then the ratio of the sum of the lengths of the lines to the ratio of n is found.
  • L1 is the average thickness of the first folding groove 113 or the second folding groove 114
  • L2 is the average thickness of the third folding groove 124 or the fourth folding groove 125
  • L1 (L11+L12+L1n)/n
  • L2 (L21+L22+L2n)/n
  • n is the number of points taken on the contour line of the groove near the d-axis side.
  • a ⁇ [1, 2], b 1.
  • the rotor structure further includes an outer layer permanent magnet 20 and an inner layer permanent magnet 30.
  • the outer layer permanent magnet 20 is disposed in the outer layer magnetic steel groove 11, and the inner layer permanent magnet 30 is disposed in the inner layer magnetic steel groove 12.
  • local demagnetization can be avoided when having the following relationship, min(J1, J2)>Ns ⁇ A ⁇ Wt/4P, where J1 is the end of the outer permanent magnet 20 and the outer edge of the rotor body 10.
  • Ns is the number of teeth of the stator teeth 41; A is the straightness of the third folding groove 124 and the fourth folding groove 125 The angle of the pole arc formed by the line between the end of the side wall of the shaft and the hole of the shaft hole 14, Wt is the width of the stator tooth, and P is the number of poles of the rotor structure.
  • the magnetic steel trough group further includes a third magnetic steel trough, the third magnetic steel trough is disposed adjacent to the inner magnetic steel trough 12, and the third magnetic steel trough and the inner magnetic steel trough 12 A magnetic conductive path is formed between the third magnetic steel grooves as a whole in a U shape or an arc shape.
  • the permanent magnet is made of ferrite or bonded NdFeB. This arrangement is advantageous for enhancing the anti-demagnetization capability of the rotor structure.
  • Wt1 is the width of the magnetic bridge formed between the groove wall of the first folding groove 113 or the second folding groove 114 and the outer edge of the rotor body 10; Wt2 is the third folding groove 124 or the fourth folding The width of the magnetic bridge formed between the groove wall of the groove 125 and the outer edge of the rotor body 10.
  • the rotor structure in the above embodiment can also be used in the field of motor equipment technology, that is, according to another aspect of the present invention, an electric machine including a rotor structure which is the rotor structure in the above embodiment is provided.
  • the rotor structure in the above embodiment can also be used in the automotive field, that is, according to another aspect of the present invention, an electric vehicle including a rotor structure which is the rotor structure in the above embodiment is provided.
  • the rotor structure is provided with a magnetic steel groove
  • the magnetic steel groove has a bending structure different from most of the shape of the magnetic steel groove near the outer circumference of the rotor. Therefore, at the bending point, the magnetic steel trough is divided into a magnetic steel trough main body and a magnetic steel trough end folding groove, and an end angle of each end lower magnetic steel trough end is larger than that of the main body of the magnetic steel trough (M>Z). ).
  • the width of the end of the magnetic steel trough gradually approaches the outer circumference of the rotor, and its width (L12, L11; L22, L21) is also smaller and smaller.
  • the magnetic steel in the inner magnetic steel trough is usually placed in a multi-plate structure and spliced into a U-shaped shape.
  • the outer layer is spliced into a V-shape or a U-shape by a flat-plate magnetic steel.
  • the thickness W1 of the region is greater than the thickness W2 of the other end of the magnetic steel.
  • Tangential magnetic bridge located at the end of the groove, the tangential thin wall between the groove and the air gap. The direction of extension of the thin wall is circumferential tangential.
  • Radial magnetic bridge a thin wall located near the center of the groove, the thin wall extending in the radial direction.
  • Wn1 outer magnetic steel groove radial magnetic bridge thickness
  • Wn2 inner magnetic steel groove radial magnetic bridge thickness
  • Ln1 outer magnetic steel groove radial magnetic bridge length
  • Ln2 The length of the inner magnetic coil slot radial magnetic bridge.
  • the present application is directed to a permanent magnet reluctance motor in which the permanent magnet is a ferrite material or a bonded NdFeB material.
  • the ferrite has a disadvantage of low intrinsic coercivity, and needs to be designed with emphasis on anti-demagnetization.
  • the rotor punching plate is provided with a magnetic steel groove, a weight reducing hollow hole 13 and a shaft hole for fixing the rotation of the rotor.
  • the magnetic steel trough is at least 2 layers, the inner magnetic steel trough is close to the axial hole, and the outer magnetic steel trough is close to the outer circumference of the rotor.
  • the hollowed rotor piece is connected as a whole by a tangential magnetic bridge on the outer circle and a radial magnetic bridge spanning the magnetic steel groove.
  • a tangential magnetic bridge must be present, and a radial magnetic bridge is selectively present depending on the strength of the rotor.
  • the multi-chip splicing type not only has a simple structure, but also provides space for the design of the radial magnetic bridge from the structure, and functions as a reinforcing rib. By adopting such a structure, the structure of the reinforcing rib can exist, thereby alleviating the effect of easy demagnetization of the U-shaped integral bottom.
  • the outer layer adopts a V-shaped structure and is suitable for structures with a large number of poles, such as 8-pole, 12-pole and above. Not only can the U-shaped structure be simplified, but also the angle of the narrowing and the two radial magnetic isolation bridge structures required for the U-shaped structure become one, and the magnetizing effect is more obvious. Conducive to the increase of permanent magnet flux.
  • the main path of the demagnetizing magnetic field is as follows: 1.
  • the radial magnetic bridge through the d-axis is closed from the d-axis; 2.
  • the tangential magnetic bridge is closed from the q-axis; 3.
  • the study found that in the case of actual demagnetization, the radial magnetic bridge and the tangential magnetic bridge are often saturated.
  • the thickness of the magnetic steel depends mainly on the reluctance of the three main paths.
  • the length of the tangential magnetic bridge can be reduced, and the average width of the end of the magnetic steel trough can be reduced, thereby reducing the q-axis.
  • the magnetic reluctance thereby improving the magnitude of the demagnetizing magnetic field on the magnetic steel.
  • the width of the end of the magnetic steel groove is the smallest at the outer circumference of the rotor, and the center of the rotor is increasing. This helps to relieve a part of the demagnetizing magnetic field from passing through the end of the folding groove when the tangential magnetic bridge is oversaturated.
  • the angle between the two silhouette edges ranges from 15° to 45° (mechanical angle). To ensure that its gradual increase is not too large or too small.
  • the width of the end of the magnetic steel groove can be understood as the average value of the shortest distance from the contour edge of the folding groove to the other side of the d-axis, and can be further defined as follows: any point is taken on the side, and the circle is rounded as the center The distance tangent to the other side is the shortest distance, taking multiple values.
  • the inner magnetic steel troughs are: L21, L22..., and the outer magnetic steel troughs are respectively: L11, L12..., and the two sets of values are respectively averaged to obtain the average distance of the end of the magnetic steel trough. They are L2 and L1 respectively.
  • the length of the magnetic isolation bridge has the following relationship with the thickness of the magnetic steel, the anti-demagnetization capability of the magnetic steel can be ensured:
  • the magnetic potential of the outer magnetic steel is often too small, and the length of the tangential magnetic bridge of the outer magnetic steel trough is required to be larger than the length of the inner magnetic steel trough tangential magnetic bridge Lt2.
  • the demagnetizing magnetic field is basically distributed on the outer circumference of the rotor, the magnetic steel having a high magnetic steel near the end of the rotor has a high resistance.
  • Demagnetization capability magnetic steel does not use chamfering, the end is rectangular or equal thickness design, or a slightly thicker design, usually no more than 10% thicker. , as shown by W1 and W2 in Figure 2.
  • the improvement of the overall anti-demagnetization capability does not mean that the demagnetization is optimal, but it is necessary to consider that the demagnetization rate of each piece of magnetic steel is as balanced as possible, and the magnetic reluctance at the end of the magnetic steel trough groove needs to be further taken into consideration, by introducing magnetic
  • the parameters of the average distance L1, L2 at the end of the steel trough can make the demagnetization rate of the inner and outer magnetic steels more uniform when the following relationship is obtained. Since the magnetic bridge is extremely saturated, its magnetic permeability is still larger than that of air. When the weight coefficient is 1.3-2, after conversion, it can be equivalent to air. According to this calculation method, uniform distribution of magnetic potential can be achieved:
  • Wm1/Wm2 a ⁇ (Lt1/Lt2)+b ⁇ (L1/L2);
  • a is the weight of the length ratio of the magnetic bridge on the rotor structure
  • b is the weight of the ratio of the average length of the hinges on the rotor structure.
  • the size of A1 determines the major magnitude of the demagnetizing field that is required to overcome the magnetic field received from the stator 40 for all of the magnetic steel inside the rotor. Therefore, the minimum value of the closest distance from each of the turning points of the multi-layer magnetic steel groove to the outer circumference of the rotor is greater than the width of the half of the number of teeth per pole multiplied by the angle of the pole arc formed by the same center of the end of the outermost end groove near the d-axis. . This ensures that the magnetic lines of force are not too saturated at the outer circumference of the rotor, causing local demagnetization of the upper portion of the magnetic steel.
  • the magnetic steel is monolithic, as shown in Fig. 6, and the same applies to the versatility of the magnetic steel groove end groove and the radial magnetic bridge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

本发明提供了一种转子结构、永磁辅助同步磁阻电机及电动汽车。转子结构包括转子本体，转子本体上设置有磁钢槽组，磁钢槽组包括外层磁钢槽，外层磁钢槽包括：第一外层磁钢槽段；第二外层磁钢槽段，第一外层磁钢槽段和第二外层磁钢槽段沿转子本体的径向方向相对地设置，第一外层磁钢槽段的长度方向的几何中心线与第二外层磁钢槽段的长度方向的几何中心线的延长线具有第一夹角；第一折槽，第一折槽与第一外层磁钢槽段相连通；第二折槽，第二折槽与第二外层磁钢槽段相连通，第一折槽的长度方向的几何中心线与第二折槽的长度方向的几何中心线的延长线具有第二夹角，第二夹角大于第一夹角。这样设置提升了具有该转子结构的电机整体抗退磁能力。

Description

转子结构、永磁辅助同步磁阻电机及电动汽车 技术领域
本发明涉及电机设备技术领域，具体而言，涉及一种转子结构、永磁辅助同步磁阻电机及电动汽车。
背景技术
现有技术中，通过磁体容置槽的两端与所述永磁体的两个端部之间分别形成空间，来提升转子的抗退磁能力。现有技术中仅给出了磁钢的极弧范围，即给出了折槽的空间范围。现有技术中还在永磁体的末端设置隔磁槽，并规定隔磁槽和永磁体的角度以及V型永磁体之间的角度。然而，其隔磁槽相对于磁钢的延长线是向极中心线靠拢的，不利于永磁磁链的增加。其次，现有技术中的两个V型磁钢所成的角度为130°～160°，当极数少于6时，可以很好的实现，而当极数较多，如12时，每个极所占角度仅有30度，仍保持两个V型磁钢的角度如此之大，只会使得永磁体的用量急剧下降，从而影响电机的出力。
现有技术中还给出采用U型或者V型结构永磁磁阻转子的抗退磁设计，主要技术点在于：将转子磁钢端部的隔磁槽进行切边处理。同时永磁体也进行切边处理。限定了较优的切角范围。然而，其限定的切角两边长度比值以及切角范围，可能存在一种情况，即磁钢很薄，切角很大的情况下，直接将磁钢的末端切为一个尖角。磁钢的抗退磁能力同磁钢厚度有很大关系，当磁钢厚度切成该形状后，充磁方向上的厚度的减小可能导致退磁严重。
某些转子磁钢由多片组合而成，在退磁磁场的作用下，某些片的退磁率很大，如超过20％，而某些片就很小，小于3％。通常来说，整体抗退磁能力取决于单片抗退磁最薄弱的磁钢。因此，采用现有技术中的电机存在结构不合理、抗磁退能力差等问题。
发明内容
本发明的主要目的在于提供一种转子结构、永磁辅助同步磁阻电机及电动汽车，以解决现有技术中的电机的抗磁退能力差的问题。
为了实现上述目的，根据本发明的一个方面，提供了一种转子结构，包括：转子本体，转子本体上设置有磁钢槽组，磁钢槽组包括外层磁钢槽，外层磁钢槽包括：第一外层磁钢槽段；第二外层磁钢槽段，第一外层磁钢槽段和第二外层磁钢槽段沿转子本体的径向方向相对地设置，第一外层磁钢槽段的长度方向的几何中心线与第二外层磁钢槽段的长度方向的几何中心线的延长线具有第一夹角；第一折槽，第一折槽与第一外层磁钢槽段相连通；第二折槽，第二折槽与第二外层磁钢槽段相连通，第一折槽的长度方向的几何中心线与第二折槽的长度方向的几何中心线的延长线具有第二夹角，其中，第二夹角大于第一夹角。
进一步地，第一外层磁钢槽段的第一端朝向转子本体的转轴孔延伸设置，第一外层磁钢槽段的第二端朝向转子本体的外边沿延伸设置，第二外层磁钢槽段的第一端朝向转轴孔延伸设置，第二外层磁钢槽段的第二端朝向转子本体的外边沿设置。
进一步地，第一折槽和第二折槽分别位于转子本体的直轴的两侧，第一折槽的第一端与第一外层磁钢槽段的第二端相连通，第一折槽的第二端朝向转子本体的外边沿延伸并逐渐远离直轴设置，第二折槽的第一端与第二外层磁钢槽段的第二端相连通，第二折槽的第二端朝向转子本体的外边沿延伸并逐渐远离直轴设置。
进一步地，第一折槽的第二端的宽度小于第一端的宽度，和/或第二折槽的第二端的宽度小于第一端的宽度。
进一步地，第二外层磁钢槽段的第一端与第一外层磁钢槽段的第一端相对地设置以形成V形结构，或者，第二外层磁钢槽段的第一端与第一外层磁钢槽段的第一端相连通以U形结构。
进一步地，磁钢槽组还包括：内层磁钢槽，外层磁钢槽与内层磁钢槽相邻地设置，外层磁钢槽与内层磁钢槽之间形成导磁通道，内层磁钢槽包括依次设置的第一内层磁钢槽段、第二内层磁钢槽段和第三内层磁钢槽段，第一内层磁钢槽段、第二内层磁钢槽段和第三内层磁钢槽段依次连通以形成开口朝向转子本体的外边沿的U形结构，或者，第一内层磁钢槽段、第二内层磁钢槽段和第三内层磁钢槽段依次间隔地设置，第一内层磁钢槽段、第二内层磁钢槽段和第三内层磁钢槽段中相邻的两个之间形成有隔磁桥。
进一步地，第一内层磁钢槽段包括第三折槽，第三折槽的第一端与第一内层磁钢槽段的靠近转子本体的外边沿的端部相连通，第三折槽的第二端朝向转子本体的外边沿延伸并逐渐远离转子本体的直轴；第三内层磁钢槽段包括第四折槽，第四折槽的第一端与第三内层磁钢槽段的靠近转子本体的外边沿的端部相连通，第四折槽的第二端朝向转子本体的外边沿延伸并逐渐远离直轴。
进一步地，0.3×Wm1<Lt1/k1<0.7×Wm1，其中，Wm1为第一外层磁钢槽段或第二外层磁钢槽段的宽度；Lt1为第一折槽或第二折槽的槽壁与转子本体的外边沿之间形成的隔磁桥的长度；k1为第一标幺值。
进一步地，0.1×Wm2<Lt2/k2<0.35×Wm2，其中，Wm2为第一内层磁钢槽段或第三内层磁钢槽段的宽度；Lt2为第三折槽或第四折槽的槽壁与转子本体的外边沿之间形成的隔磁桥的长度；k2为第二标幺值。
进一步地，0.6<Lt1/(Lt1/k1+Lt2/k2)<0.9。
进一步地，Wm1/Wm2＝a×(Lt1/k1/Lt2/k)+b×(L1/L2)，其中，a为转子结构上的隔磁桥的长度比值的权重；b为转子结构上的折槽的平均长度的比值的权重；L1为第一折槽和/或第二折槽的平均厚度；L2为第三折槽和/或第四折槽的平均厚度。
进一步地，a∈[1，2]，和/或，b＝1。
进一步地，转子结构还包括外层永磁体和内层永磁体，外层永磁体设置于外层磁钢槽内，内层永磁体设置于内层磁钢槽内。
进一步地，min(J1，J2)>Ns×A×Wt/4P，其中，J1为外层永磁体的末端与转子本体的外边沿处的最小距离；J2为内层永磁体的末端与转子本体的外边沿处的最小距离；Ns为定子齿的齿数；A为第三折槽和第四折槽的靠近直轴一侧的侧壁的端部与转子本体的转轴孔的孔心之间的连线形成的极弧夹角；Wt为定子齿的宽度；P为转子结构的极数。
进一步地，磁钢槽组还包括：第三层磁钢槽，第三层磁钢槽与内层磁钢槽相邻地设置，第三层磁钢槽与内层磁钢槽之间形成导磁通道，第三层磁钢槽整体呈U形或弧形。
进一步地，永磁体材质为铁氧体或粘结钕铁硼。
进一步地，当Wt1＜Wt2时，k1＝1，k2＝max(Wt1，Wt2)/min(Wt1，Wt2)，或者，当Wt1＞Wt2时，k2＝1，k1＝max(Wt1，Wt2)/min(Wt1，Wt2)，其中，Wt1为第一折槽或第二折槽的槽壁与转子本体的外边沿之间形成的隔磁桥的宽度；Wt2为第三折槽或第四折槽的槽壁与转子本体的外边沿之间形成的隔磁桥的宽度。
根据本发明的另一方面，提供了一种永磁辅助同步磁阻电机，包括转子结构，转子结构为上述的转子结构。
根据本发明的另一方面，提供了一种电动汽车，包括转子结构，转子结构为上述转子机构。
应用本发明的技术方案，将第一折槽的长度方向的几何中心线与第二折槽的长度方向的几何中心线的延长线形成的第二夹角设置成大于第一外层磁钢槽段的长度方向的几何中心线与第二外层磁钢槽段的长度方向的几何中心线的延长线形成的第一夹角的设置方式。这样设置在保证d轴电感基本不变的情况下，引导退磁磁场从q轴的折槽处泄洪，减少退磁磁场对永磁体原磁场的作用，有效地提升具有该转子结构的电机整体抗退磁能力。
附图说明
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1示出了根据本发明的转子结构的第一实施例的结构示意图；
图2示出了根据本发明的转子结构的第二实施例的结构示意图；
图3示出了根据本发明的转子结构的第三实施例的结构示意图；
图4示出了根据本发明的转子结构的第四实施例的结构示意图；
图5示出了根据本发明的转子结构的第五实施例的结构示意图；
图6示出了根据本发明的转子结构的第六实施例的结构示意图。
其中，上述附图包括以下附图标记：
10、转子本体；13、镂空孔；14、转轴孔
11、外层磁钢槽；111、第一外层磁钢槽段；112、第二外层磁钢槽段；113、第一折槽；114、第二折槽；
12、内层磁钢槽；121、第一内层磁钢槽段；122、第二内层磁钢槽段；123、第三内层磁钢槽段；124、第三折槽；125、第四折槽；
20、外层永磁体；30、内层永磁体；
40、定子；41、定子齿。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
需要说明的是，本申请的说明书和权利要求书及附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换，以便这里描述的本申请的实施方式例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
为了便于描述，在这里可以使用空间相对术语，如“在……之上”、“在……上方”、“在……上表面”、“上面的”等，用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是，空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如，如果附图中的器件被倒置，则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而，示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位)，并且对这里所使用的空间相对描述作出相应解释。
现在，将参照附图更详细地描述根据本申请的示例性实施方式。然而，这些示例性实施方式可以由多种不同的形式来实施，并且不应当被解释为只限于这里所阐述的实施方式。应当理解的是，提供这些实施方式是为了使得本申请的公开彻底且完整，并且将这些示例性实施方式的构思充分传达给本领域普通技术人员，在附图中，为了清楚起见，有可能扩大了层和区域的厚度，并且使用相同的附图标记表示相同的器件，因而将省略对它们的描述。
结合图1至图6所示，即根据本发明的实施例，提供了一种转子结构。
具体地，如图1所示，该转子结构包括转子本体10。转子本体10上设置有磁钢槽组。磁钢槽组包括外层磁钢槽11。外层磁钢槽11包括第一外层磁钢槽段111、第二外层磁钢槽段112、第一折槽113和第二折槽114。第一外层磁钢槽段111和第二外层磁钢槽段112沿转子本体10的径向方向相对地设置。第一外层磁钢槽段111的长度方向的几何中心线与第二外层磁钢槽段112的长度方向的几何中心线的延长线具有第一夹角Z。第一折槽113与第一外层磁钢槽段111相连通。第二折槽114与第二外层磁钢槽段112相连通，第一折槽113的长度方向的几何中心线与第二折槽114的长度方向的几何中心线的延长线具有第二夹角M，其中，第二夹角M大于第一夹角Z。
在本实施例中，将第一折槽113的长度方向的几何中心线与第二折槽114的长度方向的几何中心线的延长线形成的第二夹角设置成大于第一外层磁钢槽段111的长度方向的几何中心线与第二外层磁钢槽段112的长度方向的几何中心线的延长线形成的第一夹角的设置方式。这样设置在保证d轴电感基本不变的情况下，引导退磁磁场从q轴的折槽处“泄洪”，减少退磁磁场对永磁体原磁场的作用，有效地提升具有该转子结构的电机整体抗退磁能力。泄洪指的是：将退磁磁场比作一定的势能的水，将永磁体自带的固有属性磁场比作堤坝，当水的势能积累到一定程度，会破坏原有永磁体的固有磁性。而通过一定的转子设计，将洪水的势能通过除永磁体外的其他路径泄除，避免退磁势能全部集中在永磁体上，可以有效提升抗退磁能力。
其中，第一外层磁钢槽段111的第一端朝向转轴孔14延伸设置。第一外层磁钢槽段111的第二端朝向转子本体10的外边沿延伸设置。第二外层磁钢槽段112的第一端朝向转轴孔14延伸设置。第二外层磁钢槽段112的第二端朝向转子本体10的外边沿设置。第一折槽113和第二折槽114分别位于转子本体10的直轴d的两侧。第一折槽113的第一端与第一外层磁钢槽段111的第二端相连通。第一折槽113的第二端朝向转子本体10的外边沿延伸并逐渐远离直轴设置。第二折槽114的第一端与第二外层磁钢槽段112的第二端相连通，第二折槽114的第二端朝向转子本体10的外边沿延伸并逐渐远离直轴设置。这样设置能够有效地提高该转子结构的抗磁退能力。
在本实施例中，第一折槽113的第二端的宽度小于第一端的宽度，或第二折槽114的第二端的宽度小于第一端的宽度。当然，这两种情况也可以同时存在。这样设置能够有效地提高该转子结构的抗磁退能力。
如图1、图3和图4所示，第二外层磁钢槽段112的第一端与第一外层磁钢槽段111的第一端相连通以形成V形结构。如图2、图5和图6所示，第二外层磁钢槽段112的第一端与第一外层磁钢槽段111的第一端相连通以形成U形结构。这样设置能够有效地优化转子结构的磁路，达到提高转子扭矩的作用。
进一步地，磁钢槽组还包括内层磁钢槽12。外层磁钢槽11与内层磁钢槽12相邻地设置，外层磁钢槽11与内层磁钢槽12之间形成导磁通道。内层磁钢槽12包括依次设置的第一内层磁钢槽段121、第二内层磁钢槽段122和第三内层磁钢槽段123。第一内层磁钢槽段121、第二内层磁钢槽段122和第三内层磁钢槽段123依次连通以形成开口朝向转子本体10的外边沿的U形结构，第一内层磁钢槽段121、第二内层磁钢槽段122和第三内层磁钢槽段123依次间隔地设置，第一内层磁钢槽段121、第二内层磁钢槽段122和第三内层磁钢槽段123中相邻的两个之间形成有隔磁桥。
为了进一步提高转子结构的抗退磁能力，第一内层磁钢槽段121还包括第三折槽124。第三折槽124的第一端与第一内层磁钢槽段121的靠近转子本体10的外边沿的端部相连通。第三折槽124的第二端朝向转子本体10的外边沿延伸并逐渐远离转子本体10的直轴。第三内层磁钢槽段123包括第四折槽125。第四折槽125的第一端与第三内层磁钢槽段123的靠近转子本体10的外边沿的端部相连通。第四折槽125的第二端朝向转子本体10的外边沿延伸并逐渐远离直轴。
具体地，为了确保性能和抗退磁能力的平衡，该转子结构满足：0.3×Wm1<Lt1/k1<0.7×Wm1，其中，Wm1为第一外层磁钢槽段111或第二外层磁钢槽段112的宽度，Lt1为第一折槽113或第二折槽114的槽壁与转子本体10的外边沿之间形成的隔磁桥的长度。k1为第一标幺值。0.1×Wm2<Lt2/k2<0.35×Wm2，其中，Wm2为第一内层磁钢槽段121或第三内层磁钢槽段123的宽度，Lt2为第三折槽124或第四折槽125的槽壁与转子本体10的外边沿之间形成的隔磁桥的长度，K2为第二标幺值，0.6<Lt1/(Lt1/k1+Lt2/k2)<0.9。Wm1/Wm2＝a×(Lt1/k1/Lt2/k)+b×(L1/L2)，其中，a为转子结构上的隔磁桥的长度比值的权重，b为转子结构上的折槽平均长度的比值的权重，其中，第一折槽113的平均长度可以是通过在第一折槽113的厚度方向上的折槽两端分别取n个点，找出每对点之间连线的长度(当然，，每对点之间的连线可以是相对的两个侧壁之间的最短距离)，然后求出连线长度的总和与n的比值求得。L1为第一折槽113或第二折槽114的平均厚度，L2为第三折槽124或第四折槽125的平均厚度，其中，L1＝(L11+L12+L1n)/n，L2＝(L21+L22+L2n)/n，n为折槽的靠近d轴一侧轮廓线上所取的点的个数，当大于四个时即可满足精度。在本实施例中，优选地，a∈[1，2]，b＝1。
进一步地，转子结构还包括外层永磁体20和内层永磁体30，外层永磁体20设置于外层磁钢槽11内，内层永磁体30设置于内层磁钢槽12内。为进一步避免局部退磁，在具有以下关系时，可以避免局部退磁，min(J1，J2)>Ns×A×Wt/4P，其中，J1为外层永磁体20的末端与转子本体10的外边沿处的最小距离，J2为内层永磁体30的末端与转子本体10的外边沿处的最小距离，Ns为定子齿41的齿数；A为第三折槽124和第四折槽125的靠近直轴一侧的侧 壁的端部与转轴孔14的孔心之间的连线形成的极弧夹角，Wt为定子齿的宽度，P为转子结构的极数。
在本实施例中，磁钢槽组还包括第三层磁钢槽，第三层磁钢槽与内层磁钢槽12相邻地设置，第三层磁钢槽与内层磁钢槽12之间形成导磁通道，第三层磁钢槽整体呈U形或弧形。永磁体材质为铁氧体或粘结钕铁硼。这样设置有利于增强转子结构的抗退磁能力。
当Wt1＜Wt2时，k1＝1，k2＝max(Wt1，Wt2)/min(Wt1，Wt2)，或者，当Wt1＞Wt2时，k2＝1，k1＝max(Wt1，Wt2)/min(Wt1，Wt2)，其中，Wt1为第一折槽113或第二折槽114的槽壁与转子本体10的外边沿之间形成的隔磁桥的宽度；Wt2为第三折槽124或第四折槽125的槽壁与转子本体10的外边沿之间形成的隔磁桥的宽度。
上述实施例中的转子结构还可以用于电机设备技术领域，即根据本发明的另一方面，提供了一种电机，包括转子结构，转子结构为上述实施例中的转子结构。
上述实施例中的转子结构还可以用于汽车领域，即根据本发明的另一方面，提供了一种电动汽车，包括转子结构，转子结构为上述实施例中的转子结构。
在本实施例中，转子结构上开有磁钢槽，磁钢槽靠近转子外圆一端具有不同于磁钢槽大部分形状的弯折结构。故在该弯折处，将磁钢槽分割形成磁钢槽主体以及磁钢槽末端折槽，每个极下磁钢槽末端相对于磁钢槽主体部分形成的张角更大(M>Z)。磁钢槽末端的宽度随着逐渐靠近转子外圆，其宽度(L12，L11；L22，L21)也越来越小，内层磁钢槽内通常放置多片平板结构的磁钢拼接为U型，外层由平板结构磁钢拼接为V型或U型。为保证靠近磁钢槽末端折槽区域的磁钢不产生局部退磁，该区域厚度W1大于磁钢另一端厚度W2。相磁钢槽为V型结构时，磁钢槽之间形成径向隔磁桥，折槽末端与转子外边沿形成切向隔磁桥。
切向隔磁桥：位于折槽末端，折槽同气隙之间的切向薄壁。薄壁的延展方向为圆周切向。径向隔磁桥：位于折槽靠近圆心处的薄壁，薄壁的延展方向为径向。退磁波动率：当施加某个退磁磁场时，使得每片磁钢都退磁达到5％以上，此时，各片磁钢的退磁率进行统计，则退磁波动率＝平均退磁率/(最大退磁率-最小退磁率)。
如图4所示，Wn1:外层磁钢槽径向隔磁桥厚度、Wn2:内层磁钢槽径向隔磁桥厚度、Ln1:外层磁钢槽径向隔磁桥长度、Ln2:内层磁钢槽径向隔磁桥长度。
本申请针对永磁体为铁氧体材质或粘结钕铁硼材质的永磁磁阻电机，相比稀土电机，铁氧体具有内禀矫顽力低的劣势，需要在抗退磁上重点设计。具体地，转子冲片上开有磁钢槽、减重的镂空孔13以及用于固定转子旋转的轴孔。磁钢槽至少为2层，靠近轴孔的为内层磁钢槽，靠近转子外圆的为外层磁钢槽。镂空后的转子冲片由外圆上的切向隔磁桥以及横跨在磁钢槽上的径向隔磁桥连接为一个整体。切向隔磁桥是必须存在的，径向隔磁桥根据转子强度选择性存在。
由于U型结构，内凹过深，导致成型难，加工困难。采用多片的拼接式，不仅结构简单，从结构上也为径向隔磁桥的设计提供空间，起到加强筋的作用。采用该种结构，可以通过加强筋的结构存在，起到缓解U型整体式底部容易退磁的效果。
外层采用V型结构，适用于极数较多，如8极、12极及以上等结构。不仅可以将U型结构简化，而且夹角的缩小、U型结构所需的两条径向隔磁桥结构变为1条，聚磁效果更加明显。有利于永磁磁链的增加。
从图3可以看出，退磁磁场的主要路径如下：1、通过d轴的径向隔磁桥，从d轴闭合；2、通过切向隔磁桥从q轴闭合；3、通过磁钢槽末端折槽。研究发现，在实际退磁情况下，往往由于径向隔磁桥和切向隔磁桥较为饱和。通过磁钢槽末端折槽的退磁磁力线也较多。磁钢的厚度主要取决去这三条主要路径的磁阻情况。
通过磁钢槽末端折槽的弯折、外扩，隔磁桥向q轴的靠近，可以减少切向隔磁桥长度，并减小磁钢槽折槽末端的平均宽度，从而减少q轴上的的磁阻，从而改善磁钢上的退磁磁势大小。
磁钢槽折槽末端的宽度在转子外圆处最小，靠近转子圆心不断增加，有利于缓解在切向隔磁桥过度饱和时，分担一部分退磁磁力线从该折槽末端通过。通常两个轮廓边的夹角范围为15°-45°(机械角)。以确保其逐渐增加的幅度不过大或过小。
对于磁钢槽末端的宽度可以理解为折槽靠近d轴一侧轮廓边至另一侧的最短距离的平均值，进一步可以定义如下：在该边上任意取点，并以此为圆心作圆，与另一边相切的距离即为最短距离，取多个值。内层磁钢槽分别为：L21，L22…，和外层磁钢槽分别为：L11，L12...，分别对两组值求平均值，可以获得磁钢槽末端折槽的平均距离，分别为L2，L1。
然而，由于弯折，该条路径上磁阻的减小会导致转子的d轴电感增加过多，故性能也会越差。为了保证磁钢的抗退磁能力，同时避免d轴电感增加过多引起的凸极比下降。当隔磁桥长度同磁钢厚度具有以下关系时，可以保证磁钢的抗退磁能力:
0.1×Wm2<Lt2<0.35×Wm2；
0.3×Wm1<Lt1<0.7×Wm1；
进一步，由于退磁磁场路径1的存在，其外层磁钢所承担的磁势往往过小，需要外层磁钢槽切向隔磁桥长度Lt1大于内层磁钢槽切向隔磁桥长度Lt2,实现磁势的均匀分配,即：0.6<Lt1/(Lt1+Lt2)<0.9，由于退磁磁场基本分布在转子外圆侧，为保证靠近转子外圆磁钢末端的磁钢具有较高的抗退磁能力，磁钢不采用切角，该端为矩形等厚设计，或采用略增厚的设计，通常增厚的幅度不会超过10％。，如图2中的W1和W2所示。
进一步的，整体提升抗退磁能力的提升，并不代表退磁已最优，而要考虑每片磁钢的退磁率尽量均衡，需要进一步将磁钢槽折槽末端的磁阻考虑进去，通过引入磁钢槽末端折槽平均距离L1，L2的参数，当具有如下关系时，可以使得内外层磁钢的退磁率较为均匀。由于在 隔磁桥极度饱和的情况下，其导磁率仍较空气大。权重系数在1.3-2时，折算后，可以等效为空气。按照此计算方法可以实现磁势的均匀分配：
Wm1/Wm2＝a×(Lt1/Lt2)+b×(L1/L2)；
其中a∈[1.3，2]，b＝1；
a为转子结构上的隔磁桥的长度比值的权重，b为转子结构上的的折槽平均长度的比值的权重。
进一步，结合退磁磁场的路径上看，当磁钢槽弯折点距离过近，会直接导致磁钢槽末端折槽导磁面积减小，磁阻增加，造成强迫磁力线通过磁场内部，造成退磁。因此必须确保磁场距离转子外圆之间的空间：min(J1，J2)>Ns×A1×Wt/4P。
即，A1的大小决定转子内部所有磁钢所需要克服从定子40接收的退磁磁场的主要大小。因此，在多层磁钢槽各个转折点距离转子外圆最近距离的最小值大于每极齿数一半的宽度之和乘以最外层折槽末端靠近d轴一侧点同圆心形成的极弧夹角。这样可以确保磁力线在转子外周处不会过于饱和，引起磁钢上部的局部退磁。
进一步考虑，当隔磁桥厚度不同时，需要对同Lt1和Lt2的公式进行标幺，如Lt2的厚度增加k倍后，其在公式中对应出现的Lt2值要对应的除以k。从而确保设计的准确性。
对于无径向隔磁桥的情况，虽然d轴电感会存在一定变化，但以上所要求的保护范围仍然成立。对于无径向隔磁的情况，磁钢采用整体式的，如图6所示，对于磁钢槽末端折槽以及径向隔磁桥的通用性同样适用。
除上述以外，还需要说明的是在本说明书中所谈到的“一个实施例”、“另一个实施例”、“实施例”等，指的是结合该实施例描述的具体特征、结构或者特点包括在本申请概括性描述的至少一个实施例中。在说明书中多个地方出现同种表述不是一定指的是同一个实施例。进一步来说，结合任一实施例描述一个具体特征、结构或者特点时，所要主张的是结合其他实施例来实现这种特征、结构或者特点也落在本发明的范围内。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (19)

  1. 一种转子结构，其特征在于，包括：
    转子本体(10)，所述转子本体(10)上设置有磁钢槽组，所述磁钢槽组包括外层磁钢槽(11)，所述外层磁钢槽(11)包括：
    第一外层磁钢槽段(111)；
    第二外层磁钢槽段(112)，所述第一外层磁钢槽段(111)和所述第二外层磁钢槽段(112)沿所述转子本体(10)的径向方向相对地设置，所述第一外层磁钢槽段(111)的长度方向的几何中心线与所述第二外层磁钢槽段(112)的长度方向的几何中心线的延长线具有第一夹角；
    第一折槽(113)，所述第一折槽(113)与所述第一外层磁钢槽段(111)相连通；
    第二折槽(114)，所述第二折槽(114)与所述第二外层磁钢槽段(112)相连通，所述第一折槽(113)的长度方向的几何中心线与所述第二折槽(114)的长度方向的几何中心线的延长线具有第二夹角，其中，所述第二夹角大于所述第一夹角。
  2. 根据权利要求1所述的转子结构，其特征在于，所述第一外层磁钢槽段(111)的第一端朝向所述转子本体(10)的转轴孔(14)延伸设置，所述第一外层磁钢槽段(111)的第二端朝向所述转子本体(10)的外边沿延伸设置，所述第二外层磁钢槽段(112)的第一端朝向所述转轴孔(14)延伸设置，所述第二外层磁钢槽段(112)的第二端朝向所述转子本体(10)的外边沿设置。
  3. 根据权利要求2所述的转子结构，其特征在于，所述第一折槽(113)和所述第二折槽(114)分别位于所述转子本体(10)的直轴的两侧，所述第一折槽(113)的第一端与所述第一外层磁钢槽段(111)的第二端相连通，所述第一折槽(113)的第二端朝向所述转子本体(10)的外边沿延伸并逐渐远离所述直轴设置，所述第二折槽(114)的第一端与所述第二外层磁钢槽段(112)的第二端相连通，所述第二折槽(114)的第二端朝向所述转子本体(10)的外边沿延伸并逐渐远离所述直轴设置。
  4. 根据权利要求3所述的转子结构，其特征在于，所述第一折槽(113)的第二端的宽度小于第一端的宽度，和/或所述第二折槽(114)的第二端的宽度小于第一端的宽度。
  5. 根据权利要求1所述的转子结构，其特征在于，所述第二外层磁钢槽段(112)的第一端与所述第一外层磁钢槽段(111)的第一端相对地设置以形成V形结构，或者，所述第二外层磁钢槽段(112)的第一端与所述第一外层磁钢槽段(111)的第一端相连通以U形结构。
  6. 根据权利要求1至4中任一项所述的转子结构，其特征在于，所述磁钢槽组还包括：
    内层磁钢槽(12)，所述外层磁钢槽(11)与所述内层磁钢槽(12)相邻地设置，所述外层磁钢槽(11)与所述内层磁钢槽(12)之间形成导磁通道，所述内层磁钢槽(12)包括依次设置的第一内层磁钢槽段(121)、第二内层磁钢槽段(122)和第三内层磁钢 槽段(123)，
    所述第一内层磁钢槽段(121)、所述第二内层磁钢槽段(122)和所述第三内层磁钢槽段(123)依次连通以形成开口朝向所述转子本体(10)的外边沿的U形结构，或者，
    所述第一内层磁钢槽段(121)、所述第二内层磁钢槽段(122)和所述第三内层磁钢槽段(123)依次间隔地设置，所述第一内层磁钢槽段(121)、所述第二内层磁钢槽段(122)和所述第三内层磁钢槽段(123)中相邻的两个之间形成有隔磁桥。
  7. 根据权利要求6所述的转子结构，其特征在于，
    所述第一内层磁钢槽段(121)包括第三折槽(124)，所述第三折槽(124)的第一端与所述第一内层磁钢槽段(121)的靠近所述转子本体(10)的外边沿的端部相连通，所述第三折槽(124)的第二端朝向所述转子本体(10)的外边沿延伸并逐渐远离所述转子本体(10)的直轴；
    所述第三内层磁钢槽段(123)包括第四折槽(125)，所述第四折槽(125)的第一端与所述第三内层磁钢槽段(123)的靠近所述转子本体(10)的外边沿的端部相连通，所述第四折槽(125)的第二端朝向所述转子本体(10)的外边沿延伸并逐渐远离所述直轴。
  8. 根据权利要求7所述的转子结构，其特征在于，0.3×Wm1<Lt1/k1<0.7×Wm1，
    其中，Wm1为所述第一外层磁钢槽段(111)或所述第二外层磁钢槽段(112)的宽度；
    Lt1为所述第一折槽(113)或所述第二折槽(114)的槽壁与所述转子本体(10)的外边沿之间形成的隔磁桥的长度；
    k1为第一标幺值。
  9. 根据权利要求8所述的转子结构，其特征在于，0.1×Wm2<Lt2/k2<0.35×Wm2，
    其中，Wm2为所述第一内层磁钢槽段(121)或所述第三内层磁钢槽段(123)的宽度；
    Lt2为所述第三折槽(124)或所述第四折槽(125)的槽壁与所述转子本体(10)的外边沿之间形成的隔磁桥的长度；
    k2为第二标幺值。
  10. 根据权利要求9所述的转子结构，其特征在于，0.6<Lt1/(Lt1/k1+Lt2/k2)<0.9。
  11. 根据权利要求9所述的转子结构，其特征在于，Wm1/Wm2＝a×(Lt1/k1/Lt2/k)+b×(L1/L2)，其中，
    a为所述转子结构上的隔磁桥的长度比值的权重；
    b为所述转子结构上的折槽的平均长度的比值的权重；
    L1为所述第一折槽(113)和/或所述第二折槽(114)的平均厚度；
    L2为所述第三折槽(124)和/或所述第四折槽(125)的平均厚度。
  12. 根据权利要求11所述的转子结构，其特征在于，a∈[1，2]，和/或，b＝1。
  13. 根据权利要求7所述的转子结构，其特征在于，所述转子结构还包括外层永磁体(20)和内层永磁体(30)，所述外层永磁体(20)设置于所述外层磁钢槽(11)内，所述内层永磁体(30)设置于所述内层磁钢槽(12)内。
  14. 根据权利要求13所述的转子结构，其特征在于，min(J1，J2)>Ns×A×Wt/4P，
    其中，J1为外层永磁体(20)的末端与所述转子本体(10)的外边沿处的最小距离；
    J2为内层永磁体(30)的末端与所述转子本体(10)的外边沿处的最小距离；
    Ns为定子齿的齿数；
    A为所述第三折槽(124)和所述第四折槽(125)的靠近所述直轴一侧的侧壁的端部与所述转子本体(10)的转轴孔(14)的孔心之间的连线形成的极弧夹角；
    Wt为所述定子齿的宽度；
    P为所述转子结构的极数。
  15. 根据权利要求5所述的转子结构，其特征在于，所述磁钢槽组还包括：
    第三层磁钢槽，所述第三层磁钢槽与所述内层磁钢槽(12)相邻地设置，所述第三层磁钢槽与所述内层磁钢槽(12)之间形成导磁通道，所述第三层磁钢槽整体呈U形或弧形。
  16. 根据权利要求13所述的转子结构，其特征在于，所述永磁体材质为铁氧体或粘结钕铁硼。
  17. 根据权利要求9所述的转子结构，其特征在于，
    当Wt1＜Wt2时，k1＝1，k2＝max(Wt1，Wt2)/min(Wt1，Wt2)，或者，
    当Wt1＞Wt2时，k2＝1，k1＝max(Wt1，Wt2)/min(Wt1，Wt2)，
    其中，Wt1为所述第一折槽(113)或所述第二折槽(114)的槽壁与所述转子本体(10)的外边沿之间形成的隔磁桥的宽度；
    Wt2为所述第三折槽(124)或所述第四折槽(125)的槽壁与所述转子本体(10)的外边沿之间形成的隔磁桥的宽度。
  18. 一种永磁辅助同步磁阻电机，包括转子结构，其特征在于，所述转子结构为权利要求1至17中任一项所述的转子结构。
  19. 一种电动汽车，包括转子结构，其特征在于，所述转子结构为权利要求1至17中任一项所述的转子结构。
PCT/CN2018/119792 2018-03-16 2018-12-07 转子结构、永磁辅助同步磁阻电机及电动汽车 Ceased WO2019174316A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18909555.7A EP3767793B1 (en) 2018-03-16 2018-12-07 Rotor structure, permanent magnet assisted synchronous reluctance motor and electric automobile
US16/976,711 US11594922B2 (en) 2018-03-16 2018-12-07 Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810219854.7A CN108321954B (zh) 2018-03-16 2018-03-16 转子结构、永磁辅助同步磁阻电机及电动汽车
CN201810219854.7 2018-03-16

Publications (1)

Publication Number Publication Date
WO2019174316A1 true WO2019174316A1 (zh) 2019-09-19

Family

ID=62899174

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/119792 Ceased WO2019174316A1 (zh) 2018-03-16 2018-12-07 转子结构、永磁辅助同步磁阻电机及电动汽车

Country Status (4)

Country Link
US (1) US11594922B2 (zh)
EP (1) EP3767793B1 (zh)
CN (1) CN108321954B (zh)
WO (1) WO2019174316A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112821616A (zh) * 2021-02-26 2021-05-18 珠海格力节能环保制冷技术研究中心有限公司 一种转子冲片及具有其的转子、电机和压缩机

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108321954B (zh) 2018-03-16 2020-10-23 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108566006A (zh) * 2018-03-16 2018-09-21 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108736610B (zh) 2018-08-09 2019-07-16 珠海格力电器股份有限公司 电机转子和永磁电机
CN109194078B (zh) * 2018-09-21 2020-04-24 东南大学 一种双层永磁复合磁路记忆电机
JP6870708B2 (ja) * 2019-08-23 2021-05-12 株式会社明電舎 回転子
US20220399764A1 (en) * 2019-11-12 2022-12-15 Mavel edt S.p.A. Synchronous electric machine with reluctance assisted by permanent magnets and process for making such electric machine
IT202000012094A1 (it) * 2020-05-22 2021-11-22 Enerdrive Ltd Metodo di ottimizzazione di un motore sincrono a riluttanza assistito da magneti
GB2601109B (en) * 2020-11-03 2023-07-26 Jaguar Land Rover Ltd Rotor apparatus for an electric machine
CN114123577B (zh) * 2021-11-05 2023-01-31 珠海格力电器股份有限公司 磁钢组件、转子组件和电机
CN115765240A (zh) * 2022-12-07 2023-03-07 中国第一汽车股份有限公司 电机转子、永磁电机以及车辆
CN118074387B (zh) * 2024-04-17 2024-07-26 卧龙电气驱动集团股份有限公司 铁氧体辅助同步磁阻电机转子结构及永磁同步电机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205566051U (zh) * 2015-12-29 2016-09-07 丹佛斯（天津）有限公司 电动机
CN108321953A (zh) * 2018-03-16 2018-07-24 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108321954A (zh) * 2018-03-16 2018-07-24 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108336845A (zh) * 2018-03-16 2018-07-27 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108336842A (zh) * 2018-03-16 2018-07-27 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108566006A (zh) * 2018-03-16 2018-09-21 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108566005A (zh) * 2018-03-16 2018-09-21 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09228966A (ja) 1996-02-21 1997-09-02 Tokico Ltd スクロール式流体機械
JP4105850B2 (ja) 2001-02-05 2008-06-25 アネスト岩田株式会社 スクロール流体機械
JP4510495B2 (ja) 2004-03-30 2010-07-21 アネスト岩田株式会社 スクロール流体機械
EP1813010B1 (en) * 2004-10-26 2018-01-24 Zapi S.P.A. Design of the magnet and webs in interior permanent magent rotors
JP5421886B2 (ja) 2010-09-30 2014-02-19 アネスト岩田株式会社 スクロール流体機械
JP5643127B2 (ja) * 2011-02-03 2014-12-17 トヨタ自動車株式会社 回転電機用回転子
KR101786922B1 (ko) * 2011-05-26 2017-10-18 삼성전자주식회사 로터 및 구동 모터
FR2984628B1 (fr) * 2011-12-14 2014-11-21 Valeo Equip Electr Moteur Rotor de machine electrique tournante et machine electrique tournante comportant un tel rotor
CN202444345U (zh) * 2012-03-05 2012-09-19 珠海格力节能环保制冷技术研究中心有限公司 永磁辅助同步磁阻电机转子及其电机
TWI472684B (zh) 2012-11-22 2015-02-11 Ind Tech Res Inst 渦卷壓縮機
CN203674941U (zh) * 2013-12-25 2014-06-25 珠海格力节能环保制冷技术研究中心有限公司 永磁电机
WO2016079775A1 (ja) 2014-11-17 2016-05-26 株式会社日立産機システム スクロール式流体機械
US9925889B2 (en) * 2015-08-24 2018-03-27 GM Global Technology Operations LLC Electric machine for hybrid powertrain with dual voltage power system
CN106936284B (zh) * 2015-12-29 2024-04-16 丹佛斯（天津）有限公司 电动机
CN206190527U (zh) 2016-04-25 2017-05-24 徐道敏 一种涡旋压缩机的误差调整结构
CN205693464U (zh) * 2016-06-08 2016-11-16 珠海格力节能环保制冷技术研究中心有限公司 铁心结构、转子组件及永磁电机
CN106329773B (zh) * 2016-08-31 2018-11-27 恒大法拉第未来智能汽车（广东）有限公司 电机的转子、电机及车辆
DE102017209207A1 (de) * 2016-09-27 2018-03-29 Robert Bosch Gmbh Elektrische Maschine umfassend einen Rotor und einen Stator
CN208015471U (zh) * 2018-03-16 2018-10-26 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205566051U (zh) * 2015-12-29 2016-09-07 丹佛斯（天津）有限公司 电动机
CN108321953A (zh) * 2018-03-16 2018-07-24 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108321954A (zh) * 2018-03-16 2018-07-24 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108336845A (zh) * 2018-03-16 2018-07-27 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108336842A (zh) * 2018-03-16 2018-07-27 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108566006A (zh) * 2018-03-16 2018-09-21 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车
CN108566005A (zh) * 2018-03-16 2018-09-21 珠海格力节能环保制冷技术研究中心有限公司 转子结构、永磁辅助同步磁阻电机及电动汽车

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3767793A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112821616A (zh) * 2021-02-26 2021-05-18 珠海格力节能环保制冷技术研究中心有限公司 一种转子冲片及具有其的转子、电机和压缩机

Also Published As

Publication number Publication date
US20210006108A1 (en) 2021-01-07
US11594922B2 (en) 2023-02-28
EP3767793A1 (en) 2021-01-20
EP3767793B1 (en) 2026-04-22
CN108321954A (zh) 2018-07-24
EP3767793A4 (en) 2021-04-21
CN108321954B (zh) 2020-10-23

Similar Documents

Publication Publication Date Title
CN108321954B (zh) 转子结构、永磁辅助同步磁阻电机及电动汽车
KR102459309B1 (ko) 회전자 구조, 영구자석 보조 동기 자기 저항 모터 및 전기 자동차
US11770038B2 (en) Rotor structure, permanent magnet auxiliary synchronous reluctance motor, and electric vehicle
CN108336845B (zh) 转子结构、永磁辅助同步磁阻电机及电动汽车
EP3761485B1 (en) Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric vehicle
WO2019174315A1 (zh) 转子结构、永磁辅助同步磁阻电机及电动汽车
US11799333B2 (en) Permanent magnet auxiliary synchronous reluctance motor and electric vehicle provided with same
EP3767796B1 (en) Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric vehicle
WO2021134276A1 (zh) 电机的转子、驱动电机和车辆
WO2019174322A1 (zh) 转子结构、永磁辅助同步磁阻电机及电动汽车
CN208015471U (zh) 转子结构、永磁辅助同步磁阻电机及电动汽车
CN212435452U (zh) 转子结构、电机及压缩机
CN120546320A (zh) 一种绕组函数增强式广域高效永磁无刷电机及其设计方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18909555

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2018909555

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 2018909555

Country of ref document: EP