Rotor punching sheet, motor rotor, motor and vehicle

Abstract

The utility model discloses a rotor punching sheet, a motor rotor, a motor and a vehicle, the rotor punching sheet comprises at least one magnetic pole, each magnetic pole comprises a first group of magnet grooves, the first group of magnet grooves comprises a plurality of first magnet grooves arranged on two opposite sides of a D shaft, each first magnet groove comprises a first segment of groove body and a second segment of groove body, the included angle between the first section of groove body and the second section of groove body is A; the second group of magnet grooves are arranged on the outer side of the first group of magnet grooves along the radial direction of the rotor punching sheet, the second group of magnet grooves comprise a plurality of second magnet grooves arranged on the two opposite sides of the D shaft, and the included angle between the second magnet grooves and the Q shaft is B; wherein the central axes of the D shaft, the Q shaft and the rotor punching sheet are vertical to each other; a and B satisfy 0.03 < = B / A < = 0.13. According to the rotor punching sheet of the utility model, the fluctuation of the motor torque and the harmonic distortion rate can be effectively reduced, the motor torque output is more stable, and the working condition adaptability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and particularly relates to a rotor punching sheet, a motor rotor, a motor and a vehicle. Background Art

[0002] The motor rotor in the related art is a rotating component of a permanent magnet synchronous motor, and through the interaction between the magnetic field and the magnetic field generated by the stator, the conversion of electrical energy into mechanical energy can be realized. Moreover, the motor rotor generally includes a rotor punching sheet, and a plurality of magnet slots for installing permanent magnets are arranged on the rotor punching sheet.

[0003] However, due to the unreasonable arrangement mode of the magnet slots in the related art (such as the angle of the magnet slots), the arrangement mode of the permanent magnets and the magnetic circuit structure are unreasonable, which easily leads to significant torque fluctuation and increased harmonic distortion rate, and the working condition adaptability of the motor is poor. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a rotor punching sheet, which can effectively reduce the fluctuation of the motor torque and the harmonic distortion rate, the motor torque output is more stable, and the working condition adaptability is better.

[0005] The utility model also provides a motor rotor with the above-mentioned rotor punching sheet.

[0006] The utility model also provides a motor with the above-mentioned motor rotor.

[0007] The utility model also provides a vehicle with the above-mentioned motor.

[0008] To achieve the above object, according to the first aspect embodiment of the utility model, a rotor punching sheet is provided, including: at least one magnetic pole, and each magnetic pole includes: a first group of magnet slots, the first group of magnet slots includes a plurality of first magnet slots arranged on opposite sides of the D axis, the first magnet slots include a first section of slot body and a second section of slot body, and the included angle between the first section of slot body and the second section of slot body is A; a second group of magnet slots, along the radial direction of the rotor punching sheet, the second group of magnet slots is arranged outside the first group of magnet slots, and the second group of magnet slots includes a plurality of second magnet slots arranged on opposite sides of the D axis, and the included angle between the second magnet slots and the Q axis is B; wherein, the D axis, the Q axis and the central axis of the rotor punching sheet are perpendicular to each other; A and B satisfy: 0.03≤B / A≤0.13.

[0009] The rotor punching sheet according to the embodiment of the utility model can effectively reduce the fluctuation of the motor torque and the harmonic distortion rate, the motor torque output is more stable, and the working condition adaptability is better.

[0010] According to some embodiments of the present utility model, the A and the B satisfy: 0.06 ≤ B / A ≤ 0.1.

[0011] According to some embodiments of the present utility model, the A satisfies: 110° ≤ A ≤ 180°.

[0012] According to some embodiments of the present utility model, the B satisfies: 0 ≤ B ≤ 15°.

[0013] According to some embodiments of the present utility model, a plurality of the first magnet slots are symmetrically arranged with respect to the D axis.

[0014] According to some embodiments of the present utility model, a plurality of the second magnet slots are symmetrically arranged with respect to the D axis.

[0015] According to some embodiments of the present utility model, the rotor punching sheet further includes a first magnetic member and a second magnetic member. The first magnetic member is disposed in the first segment of the slot body, and the second magnetic member is disposed in the second segment of the slot body. The first magnetic member and the second magnetic member share the first magnet slot.

[0016] According to some embodiments of the present utility model, the rotor punching sheet is configured with a first connecting rib, and the first connecting rib is disposed between the first segment of the slot body and the second segment of the slot body.

[0017] According to some embodiments of the present utility model, the first segment of the slot body is adjacent to the D axis relative to the second segment of the slot body, and the angle between the first segment of the slot body and the Q axis is C, and the C satisfies: -15° ≤ C ≤ 15°.

[0018] According to some embodiments of the present utility model, the angle between the first segment of the slot body on one side of the D axis and the Q axis is C1, and the angle between the first segment of the slot body on the other side of the D axis and the Q axis is C2; wherein, the C1 and the C2 satisfy: 0.07 ≤ C1 / C2 ≤ 15.

[0019] According to some embodiments of the present utility model, a plurality of the first magnet slots are asymmetrically arranged with respect to the D axis.

[0020] According to some embodiments of the present utility model, a plurality of the second magnet slots are asymmetrically arranged with respect to the D axis.

[0021] According to some embodiments of the present utility model, the second magnet slot includes a third segment of the slot body and a fourth segment of the slot body. The third segment of the slot body is adjacent to the D axis relative to the fourth segment of the slot body, and the B is formed between the third segment of the slot body and the Q axis.

[0022] According to some embodiments of the present utility model, the included angle between the third segment of the slot body on one side of the D axis and the Q axis is B1, and the included angle between the third segment of the slot body on the other side of the D axis and the Q axis is B2; wherein, B1 and B2 satisfy: 0.07 ≤ B1 / B2 ≤ 15.

[0023] According to some embodiments of the present utility model, the rotor punching sheet is configured with a second connecting rib, and the second connecting rib is arranged between the third segment of the slot body and the fourth segment of the slot body.

[0024] According to some embodiments of the present utility model, the rotor punching sheet further includes a third magnetic member and a fourth magnetic member. The third magnetic member is arranged in the third segment of the slot body, the fourth magnetic member is arranged in the fourth segment of the slot body, and the third magnetic member and the fourth magnetic member share the second magnet slot.

[0025] According to some embodiments of the present utility model, there are multiple magnetic poles, at least part of the multiple magnetic poles are multiple first magnetic poles, and at least part of the multiple magnetic poles are multiple second magnetic poles, and the B and / or C of the first magnetic poles and the second magnetic poles are different.

[0026] According to some embodiments of the present utility model, the multiple first magnetic poles are arranged adjacent to each other, and the multiple second magnetic poles are arranged adjacent to each other.

[0027] According to some embodiments of the present utility model, the first magnetic poles and the second magnetic poles are arranged alternately at intervals one by one.

[0028] According to a second aspect embodiment of the present utility model, a motor rotor is provided, and the motor rotor includes: a rotor core, and the rotor core includes multiple rotor punching sheets according to the first aspect embodiment of the present utility model, and the multiple rotor punching sheets are stacked.

[0029] For the motor rotor according to the second aspect embodiment of the present utility model, by using the rotor punching sheet according to the first aspect embodiment of the present utility model, the fluctuation of the motor torque can be effectively reduced and the harmonic distortion rate can be reduced, the motor torque output is more stable, and the working condition adaptability is better.

[0030] According to a third aspect embodiment of the present utility model, a motor is provided, and the motor includes a stator and the motor rotor according to the second aspect embodiment of the present utility model.

[0031] For the motor according to the third aspect embodiment of the present utility model, by using the motor rotor according to the second aspect embodiment of the present utility model, the motor rotor can effectively reduce the fluctuation of the motor torque and reduce the harmonic distortion rate, the motor torque output is more stable, and the working condition adaptability is better.

[0032] According to an embodiment of the fourth aspect of the present invention, a vehicle is provided, and the vehicle includes a motor according to the embodiment of the third aspect of the present invention.

[0033] For the vehicle according to the embodiment of the fourth aspect of the present invention, by using the motor according to the embodiment of the third aspect of the present invention, the fluctuation of the motor torque can be effectively reduced and the harmonic distortion rate can be reduced. The motor torque output is more stable and the working condition adaptability is better.

[0034] Some of the additional aspects and advantages of the present invention will be given in the following description, some will become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0035] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0036] Figure 1 is a schematic structural diagram of a motor rotor according to the first embodiment of the present invention;

[0037] Figure 2 is a schematic structural diagram of a motor rotor according to the second embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a motor rotor according to the third embodiment of the present invention;

[0039] Figure 4 is a schematic structural diagram of a motor rotor according to the fourth embodiment of the present invention;

[0040] Figure 5 is a schematic structural diagram of a motor rotor according to the fifth embodiment of the present invention;

[0041] Figure 6 is a schematic structural diagram of the first type of magnetic pole according to the present invention;

[0042] Figure 7 is a schematic structural diagram of the second type of magnetic pole according to the present invention;

[0043] Figure 8 is a schematic structural diagram of the third type of magnetic pole according to the present invention;

[0044] Figure 9 is a schematic structural diagram of the fourth type of magnetic pole according to the present invention;

[0045] Reference Signs:

[0046] 1. Rotor punching; 2. Motor rotor

[0047] 100, Magnetic Pole; 110, First Magnetic Pole; 120, Second Magnetic Pole; 130, Third Magnetic Pole;

[0048] 200, First Group of Magnet Slots; 210, First Magnet Slot; 211, First Section of the Slot Body; 212, Second Section of the Slot Body; 220, First Connecting Rib;

[0049] 300, Second Group of Magnet Slots; 310, Second Magnet Slot; 311, Third Section of the Slot Body; 312, Fourth Section of the Slot Body; 320, Second Connecting Rib;

[0050] 410, Magnetic Flux Blocking Slot; 420, Weight Reduction Hole;

[0051] 510, First Magnetic Component; 520, Second Magnetic Component; 530, Third Magnetic Component; 540, Fourth Magnetic Component. Detailed Embodiment

[0052] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0054] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0055] In the description of the present invention, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more.

[0056] The rotor punching sheet 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0057] As Figures 1-9 shown, the rotor punching sheet 1 according to an embodiment of the present invention includes at least one magnetic pole 100, and each magnetic pole 100 includes a first group of magnet slots 200 and a second group of magnet slots 300.

[0058] The first set of magnet slots 200 includes a plurality of first magnet slots 210 provided on opposite sides of the D axis. The first magnet slots 210 include a first section of slot body 211 and a second section of slot body 212. The included angle between the first section of slot body 211 and the second section of slot body 212 is A. Along the radial direction of the rotor punching sheet 1, the second set of magnet slots 300 is provided outside the first set of magnet slots 200, and the second set of magnet slots 300 includes a plurality of second magnet slots 310 provided on opposite sides of the D axis. The included angle between the second magnet slots 310 and the Q axis is B.

[0059] Wherein, the D axis, the Q axis and the central axis of the rotor punching sheet 1 are perpendicular to each other, and the included angles A and B satisfy: 0.03 ≤ B / A ≤ 0.13. For example, B / A can be 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12 or 0.13.

[0060] Wherein, the D axis intersects with the central axis of the rotor punching sheet 1, that is, the D axis can coincide with the diameter of the rotor punching sheet 1, and each magnetic pole 100 can be symmetrically arranged with respect to the D axis.

[0061] In addition, the included angle between the first section of slot body 211 and the second section of slot body 212 being A means that the included angle between the central axis in the width direction of the first section of slot body 211 and the central axis in the width direction of the second section of slot body 212 is A. And, the included angle between the second magnet slots 310 and the Q axis being B means that the included angle between the central axis in the width direction of the second magnet slots 310 and the Q axis is B. In addition, it should be noted that the included angle B refers to the acute angle formed between the central axis in the width direction of the second magnet slots 310 and the Q axis.

[0062] According to the rotor punching sheet 1 of the embodiment of the present utility model, by making the included angles A and B satisfy 0.03 ≤ B / A ≤ 0.13, in this way, it is possible to avoid B / A being too small or too large, and further optimize the arrangement and setting angles of the multiple magnet slots of each magnetic pole 100, and further optimize the geometric shape, arrangement and magnetic circuit structure of the permanent magnet. Not only can the magnetic flux concentration effect between the first set of magnet slots 200 and the second set of magnet slots 300 be improved, so that the magnetic field is superimposed and enhanced in a specific area to improve the torque output of the motor, but also the torque fluctuation of the motor can be effectively reduced and the harmonic distortion rate can be reduced, the torque output of the motor is more stable, and the working condition adaptability of the motor is better.

[0063] Specifically, as shown in the test data in Table 1 below, when 0.03 ≤ B / A ≤ 0.13, both the torque ripple and the harmonic distortion rate of the motor can be relatively low. That is to say, when 0.03 ≤ B / A ≤ 0.13, the motor can take into account the advantages of small torque ripple and low harmonic distortion rate, thereby greatly improving the stability of the torque output of the motor and making the working condition adaptability of the motor better.

[0064] Table 1

[0065]

[0066] Thus, the rotor punching sheet 1 according to the embodiment of the present invention can effectively reduce the torque ripple of the motor and the harmonic distortion rate, the torque output of the motor is more stable, and the working condition adaptability is better.

[0067] In some specific embodiments of the present invention, as Figure 1 shown, the included angle A and the included angle B satisfy: 0.06 ≤ B / A ≤ 0.1.

[0068] In this way, the arrangement mode and the setting angle of the plurality of magnet slots of each magnetic pole 100 can be further optimized, and then the geometric shape, the arrangement mode and the magnetic circuit structure of the permanent magnet can be optimized. Not only can the magnetic flux concentration effect between the first group of magnet slots 200 and the second group of magnet slots 300 be improved, so that the magnetic field is superimposed and enhanced in a specific area to improve the torque output of the motor, but also the torque ripple of the motor can be effectively reduced and the harmonic distortion rate can be reduced, the torque output of the motor is more stable, and the working condition adaptability of the motor is better.

[0069] In some specific embodiments of the present invention, as Figure 1 shown, the included angle A satisfies: 110° ≤ A ≤ 180°.

[0070] By setting 110° ≤ A ≤ 180°, not only can it be avoided that the magnetic flux density between the second magnet slot 310 and the first magnet slot 210 is too high due to too small value of the included angle A, which is beneficial to reducing the iron loss of the motor, thereby improving the motor efficiency, but also it can be avoided that the magnetic flux concentration effect of the motor rotor 2 decreases due to too large value of the included angle A, which is beneficial to increasing the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0071] In this way, by adjusting the setting angle of the second magnet slot 310, not only can the iron loss of the motor be reduced to make the motor more efficient, but also the magnetic flux concentration effect of the motor rotor 2 can be effectively improved, the overall magnetic flux of the motor can be higher, thereby improving the output torque of the motor and making the motor more efficient.

[0072] In some specific embodiments of the present invention, as Figure 1 shown, the included angle B satisfies: 0 ≤ B ≤ 15°.

[0073] For example, the included angle B can be 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14° or 15°. This can avoid the decrease in the magnetic flux concentration effect of the motor rotor 2 caused by too large a value of B, which is beneficial to improving the overall magnetic flux of the motor, and thus can enable the motor to output high torque.

[0074] As shown in the test data in Table 2 below, the effects of different values of the included angle A and the included angle B on the torque ripple and the harmonic distortion rate are as follows:

[0075] Table 2

[0076]

[0077] In some specific embodiments of the present invention, as Figure 1 and Figure 2 shown, a plurality of first magnet slots 210 are symmetrically arranged about the D axis.

[0078] That is to say, the first-stage slots 211 of the plurality of first magnet slots 210 are symmetrically arranged about the D axis, that is, the included angle between each first-stage slot 211 and the Q axis is the same. And, the second-stage slots 212 of the plurality of first magnet slots 210 are also symmetrically arranged about the D axis, that is, the included angle between each second-stage slot 212 and the Q axis is the same.

[0079] Such an arrangement can simplify the arrangement mode of the plurality of first magnet slots 210 of the first group of magnet slots 200, that is, the arrangement structure of the magnetic poles 100 can be simplified, and the arrangement mode of the plurality of first magnet slots 210 can be relatively uniform, so as to facilitate the magnetic flux of the magnetic circuit in the motor rotor 2 and facilitate the magnetic flux concentration design of the magnetic circuit, and further reduce magnetic leakage.

[0080] In some specific embodiments of the present invention, as Figure 1 and Figure 2 shown, a plurality of second magnet slots 310 are symmetrically arranged about the D axis.

[0081] That is to say, the included angle between each second magnet slot 310 and the Q axis is the same.

[0082] Such an arrangement can simplify the arrangement mode of the plurality of second magnet slots 310 of the second group of magnet slots 300, that is, the arrangement structure of the magnetic poles 100 can be simplified, and the arrangement mode of the plurality of second magnet slots 310 can be relatively uniform, so as to facilitate the magnetic flux of the magnetic circuit in the motor rotor 2 and facilitate the magnetic flux concentration design of the magnetic circuit, and further reduce magnetic leakage.

[0083] In some specific embodiments of the present invention, as Figure 1 and Figure 9As shown, the rotor punching sheet 1 further includes a first magnetic member 510 and a second magnetic member 520. The first magnetic member 510 is disposed in the first-stage slot body 211, and the second magnetic member 520 is disposed in the second-stage slot body 212. The first magnetic member 510 and the second magnetic member 520 share the first magnet slot 210.

[0084] That is to say, the first-stage slot body 211 and the second-stage slot body 212 are communicated with each other, and the first magnetic member 510 and the second magnetic member 520 are respectively disposed in the first-stage slot body 211 and the second-stage slot body 212. The first magnetic member 510 and the second magnetic member 520 share the first magnet slot 210. In this way, the structure of the first magnet slot 210 can be simplified, and further the structure of the rotor punching sheet 1 can be simplified, which is convenient for processing.

[0085] Wherein, a first connecting rib 220 can be provided between multiple first magnet slots 210, that is, two adjacent first magnet slots 210 are separated by the first connecting rib 220.

[0086] In some other specific embodiments of the present invention, as Figures 2-8 shown, the rotor punching sheet 1 is configured with a first connecting rib 220, and the first connecting rib 220 is disposed between the first-stage slot body 211 and the second-stage slot body 212. Wherein, a first connecting rib 220 can also be provided between multiple first magnet slots 210, that is, two adjacent first magnet slots 210 are separated by the first connecting rib 220.

[0087] With such a setting, the first-stage slot body 211 and the second-stage slot body 212 can be two independent slot bodies, and the first magnetic member 510 and the second magnetic member 520 can be respectively disposed in the two independent slot bodies.

[0088] Thus, by providing the first connecting rib 220, the structural arrangement of the first magnet slot 210 can be more diversified, so as to optimize the magnetic circuit of the motor rotor 2, and further reduce magnetic leakage.

[0089] In some specific embodiments of the present invention, as Figure 1 shown, the first-stage slot body 211 is adjacent to the D axis relative to the second-stage slot body 212, and the included angle between the first-stage slot body 211 and the Q axis is C, and the included angle C satisfies: -15° ≤ C ≤ 15°.

[0090] Wherein, the included angle between the first-stage slot body 211 and the Q axis is C, which means that the included angle between the central axis in the width direction of the first-stage slot body 211 and the Q axis is C.

[0091] It should be noted that when the included angle C is negative, it means that the end of the first-stage slot body 211 away from the D axis is inclined towards the central axis of the rotor punching sheet 1. At this time, the included angle between the central axis in the width direction of the first-stage slot body 211 and the Q axis is negative. And when the included angle B is positive, it means that the end of the first-stage slot body 211 away from the D axis is inclined away from the central axis of the rotor punching sheet 1. At this time, the included angle between the central axis in the width direction of the first-stage slot body 211 and the Q axis is positive.

[0092] Such a setting can avoid the reduction of the magnetic flux concentration effect of the motor rotor 2 caused by too large a value of the included angle C, which is beneficial to improving the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0093] In some specific embodiments of the present invention, as Figure 2 shown, the included angle between the first-stage slot body 211 on one side of the D axis and the Q axis is C1, and the included angle between the first-stage slot body 211 on the other side of the D axis and the Q axis is C2.

[0094] Among them, the included angle C1 and the included angle C2 satisfy: 0.07 ≤ C1 / C2 ≤ 15.

[0095] That is to say, C1 / C2 will not be less than 0.07, which can avoid too small C1, is beneficial to reducing the magnetic density between the first-stage slot body 211 and the second magnet slot 310, and further can reduce the iron loss of the motor, which is beneficial to improving the motor efficiency. And C1 / C2 will not be greater than 15, which can avoid too large C1, is beneficial to improving the magnetic flux concentration effect between the first-stage slot body 211 and the second magnet slot 310, and further can improve the torque output of the motor.

[0096] In some specific embodiments of the present invention, as Figures 5-9 shown, the multiple first magnet slots 210 are asymmetrically arranged with respect to the D axis.

[0097] For example, the first-stage slot bodies 211 of the multiple first magnet slots 210 can be asymmetrically arranged with respect to the D axis, that is, the included angles between the first-stage slot bodies 211 of the multiple first magnet slots 210 and the Q axis are different.

[0098] This can more effectively artificially create the magnetic field distribution. Different first magnet slots 210 can be non-uniformly distributed, which can make the harmonic content of the air-gap magnetic density waveform lower, thereby avoiding torque fluctuations and electromagnetic noise, enabling the output of the motor torque to be more stable, and the setting method of the first magnet slots 210 to be more diversified, so that the motor can better adapt to different working conditions.

[0099] In some specific embodiments of the present invention, as Figure 6 shown, the multiple second magnet slots 310 are asymmetrically arranged with respect to the D axis.

[0100] That is, the angles between multiple second magnet slots 310 and the Q-axis are different.

[0101] In this way, the magnetic field distribution of the artificial manufacturing part can be more effectively achieved. Different third magnet slots can be non-uniformly distributed, which can reduce the harmonic content of the air-gap magnetic density waveform, thereby avoiding torque fluctuations and electromagnetic noise, enabling the output of the motor torque to be more stable, making the setting method of the third magnet slots more diverse, and enabling the motor to better adapt to different working conditions.

[0102] In some specific embodiments of the present invention, as Figure 2 shown, the second magnet slot 310 includes a third section slot body 311 and a fourth section slot body 312. The third section slot body 311 is closer to the D-axis than the fourth section slot body 312, and an angle B is formed between the third section slot body 311 and the Q-axis. In this way, the second magnet slot 310 can also be configured in multiple sections, and one or more magnetic parts can also be arranged in the second magnet slot 310, so as to make the setting method of the magnetic pole 100 more diverse, thereby facilitating the optimization of the magnetic circuit of the motor rotor 2 and enabling the magnetic flux concentration effect of the motor rotor 2 to be better.

[0103] In addition, it should be noted that the angle B can also be -15° to 15°. It should be noted that when the angle B is negative, it means that the end of the third section slot body 311 far from the D-axis inclines towards the center axis of the rotor punching sheet 1, and at this time, the angle between the central axis in the width direction of the third section slot body 311 and the Q-axis is negative. And when the angle B is positive, it means that the end of the third section slot body 311 far from the D-axis inclines away from the center axis of the rotor punching sheet 1, and at this time, the angle between the central axis in the width direction of the third section slot body 311 and the Q-axis is positive.

[0104] Such a setting can avoid the decrease in the magnetic flux concentration effect of the motor rotor 2 caused by too large an angle B value, which is beneficial to increasing the overall magnetic flux of the motor, and thus can enable the motor to output high torque.

[0105] In some specific embodiments of the present invention, as Figure 2 shown, the angle between the third section slot body 311 on one side of the D-axis and the Q-axis is B1, and the angle between the third section slot body 311 on the other side of the D-axis and the Q-axis is B2.

[0106] Among them, the angles B1 and B2 satisfy: 0.07 ≤ B1 / B2 ≤ 15.

[0107] That is to say, B1 / B2 will not be less than 0.07, which can avoid B1 being too small, is beneficial to reducing the magnetic density between the third-stage slot body 311 and the first magnet slot 210, and further can reduce the iron loss of the motor, which is beneficial to improving the motor efficiency. Moreover, B1 / B2 will not be greater than 15, which can avoid B1 being too large, is beneficial to improving the magnetic concentrating effect between the third-stage slot body 311 and the first magnet slot 210, and further can improve the torque output of the motor.

[0108] In some specific embodiments of the present utility model, as Figures 2-5 shown, the rotor punching sheet 1 is configured with a second connecting rib 320, and the second connecting rib 320 is arranged between the third-stage slot body 311 and the fourth-stage slot body 312.

[0109] By providing the second connecting rib 320, the third-stage slot body 311 and the fourth-stage slot body 312 can be two independent slot bodies, so that the third magnetic member 530 and the fourth magnetic member 540 can be respectively arranged in the two independent slot bodies. Thus, by providing the second connecting rib 320, the structural arrangement of the second magnet slot 310 can be more diversified, thereby optimizing the magnetic circuit of the motor rotor 2 and further reducing magnetic leakage.

[0110] In some other specific embodiments of the present utility model, as Figure 1 and Figure 9 shown, it further includes a third magnetic member 530 and a fourth magnetic member 540. The third magnetic member 530 is arranged in the third-stage slot body 311, the fourth magnetic member 540 is arranged in the fourth-stage slot body 312, and the third magnetic member 530 and the fourth magnetic member 540 share the second magnet slot 310.

[0111] That is to say, the third-stage slot body 311 and the fourth-stage slot body 312 are communicated, and the third magnetic member 530 and the fourth magnetic member 540 are respectively arranged in the third-stage slot body 311 and the fourth-stage slot body 312, and the third magnetic member 530 and the fourth magnetic member 540 share the second magnet slot 310, which can simplify the structure of the second magnet slot 310, and further simplify the structure of the rotor punching sheet 1, facilitating processing.

[0112] Among them, a second connecting rib 320 can also be arranged between multiple second magnet slots 310, that is, two adjacent second magnet slots 310 are separated by the second connecting rib 320.

[0113] In some specific embodiments of the present utility model, as Figures 3-5 shown, there are multiple magnetic poles 100, at least part of the multiple magnetic poles 100 are multiple first magnetic poles 110, and at least part of the multiple magnetic poles 100 are multiple second magnetic poles 120, and the included angle B and / or the included angle C between the first magnetic poles 110 and the second magnetic poles 120 are different.

[0114] For example, the included angle B between the first magnetic pole 110 and the second magnetic pole 120 is different; alternatively, the included angle C between the first magnetic pole 110 and the second magnetic pole 120 is different; or, both the included angle B and the included angle C between the first magnetic pole 110 and the second magnetic pole 120 are different.

[0115] With such a setting, the arrangement modes of the first magnet slots 210 and / or the second magnet slots 310 of the first magnetic pole 110 and the second magnetic pole 120 can be different, so that the arrangement modes of the magnetic members in the first magnet slots 210 and / or the second magnet slots 310 can be different. In this way, the partial magnetic field distribution can be artificially created more effectively, which is beneficial to reducing the harmonic content of the motor. The non-uniformity of the arrangement of the first magnet slots 210 and the second magnet slots 310 of different magnetic poles 100 can be stronger, so that the harmonic content of the air-gap magnetic density waveform can be lower, thereby more effectively avoiding torque fluctuations and electromagnetic noise, enabling the output of the motor torque to be more stable, and enabling the motor to better adapt to different working conditions.

[0116] By setting the arrangement modes of multiple magnetic poles 100 to be different, the design of multiple permanent magnets of the motor rotor 2 can be optimized. The motor rotor 2 can implement a gradual modification of the magnetic poles 100, actively construct an optimal magnetic field gradient that conforms to the dynamic change of the electromagnetic load, and can increase the fundamental wave magnetic field intensity, thereby reducing the 5 / 7th and 11 / 13th harmonic contents of the motor, reducing the torque ripple of the motor, and improving the noise and vibration of the motor.

[0117] In some specific embodiments of the present invention, as Figure 3 shown, multiple first magnetic poles 110 are arranged adjacent to each other, and multiple second magnetic poles 120 are arranged adjacent to each other. That is to say, the magnetic poles 100 with the same arrangement mode are arranged adjacent to each other in a concentrated manner.

[0118] Among them, multiple magnetic poles 100 may further include a third magnetic pole 130. For example, when there are six magnetic poles 100, multiple magnetic poles 100 may include two first magnetic poles 110, two second magnetic poles 120, and two third magnetic poles 130. The two first magnetic poles 110 are arranged adjacent to each other, the two second magnetic poles 120 are arranged adjacent to each other, and the two third magnetic poles 130 are arranged adjacent to each other.

[0119] In this way, the arrangement mode of the first magnetic pole 110, the arrangement mode of the second magnetic pole 120, and the arrangement mode of the third magnetic pole 130 can be different, and multiple magnetic poles 100 can be non-uniformly distributed. In this way, the harmonic content of the air-gap magnetic density waveform can be relatively low, thereby avoiding torque fluctuations and electromagnetic noise, enabling the output of the motor torque to be more stable, and the various arrangement modes of the permanent magnets can enable the motor to better adapt to different working conditions.

[0120] In some other specific embodiments of the present invention, as Figure 4 and Figure 5As shown, the first magnetic poles 110 and the second magnetic poles 120 are arranged alternately at intervals one by one.

[0121] For example, when there are six magnetic poles 100, the multiple magnetic poles 100 may include three first magnetic poles 110 and three second magnetic poles 120, and different first magnetic poles 110 and second magnetic poles 120 are arranged adjacent to each other. Moreover, the arrangement patterns of the first magnetic poles 110 and the second magnetic poles 120 are different, so that the multiple magnetic poles 100 can be non-uniformly distributed. In this way, the harmonic content of the air-gap magnetic density waveform can be relatively low, thereby avoiding torque fluctuations and electromagnetic noise, enabling the output of the motor torque to be more stable, and the various arrangement patterns of the permanent magnets can enable the motor to better adapt to different working conditions.

[0122] In some specific embodiments of the present utility model, as Figures 2-4 shown, the rotor punching sheet 1 is further provided with at least one magnetic flux blocking groove 410, and the magnetic flux blocking groove 410 is arranged between the second magnet groove 310 and the outer peripheral edge of the rotor punching sheet 1.

[0123] By constructing the magnetic flux blocking groove 410, the magnetic flux blocking groove 410 can be used to cut off the magnetic circuit at the corresponding position of the rotor punching sheet 1, and then the magnetic flux blocking groove 410 can be used to correct the setting of the magnetic circuit, so as to change the structure of the magnetic circuit, make the magnetic field superimposed and enhanced in a specific area, the magnetic flux concentrating effect of the magnetic circuit is better, and further reduce the magnetic leakage of the motor, which is beneficial to improving the magnetic flux of the motor, improving the magnetic field utilization rate, and can improve the torque and power of the motor, as well as improve the power density and torque density of the motor.

[0124] Among them, the cross-sectional shape of the magnetic flux blocking groove 410 may not be limited. When there is one magnetic flux blocking groove 410, the cross-sectional shape of the magnetic flux blocking groove 410 may be one of a circle, a rectangle or a triangle; and when there are multiple magnetic flux blocking grooves 410, the cross-sectional shapes of the multiple magnetic flux blocking grooves 410 may be one of a circle, a rectangle or a triangle or a combination of multiple ones.

[0125] In addition, the rotor punching sheet 1 may be provided with a plurality of weight-reducing holes 420, and the plurality of weight-reducing holes 420 are adjacent to the center of the rotor punching sheet 1 and are arranged at intervals along the circumferential direction of the rotor punching sheet 1.

[0126] Next, the motor rotor 2 according to an embodiment of the present utility model will be described with reference to the drawings. The motor rotor 2 includes: a rotor core, and the rotor core includes a plurality of rotor punching sheets 1 according to the above embodiments of the present utility model, and the plurality of rotor punching sheets 1 are stacked.

[0127] For the motor rotor 2 according to an embodiment of the present utility model, by using the rotor punching sheet 1 according to the above embodiments of the present utility model, the fluctuation of the motor torque can be effectively reduced and the harmonic distortion rate can be reduced, the motor torque output is more stable, and the working condition adaptability is better.

[0128] The motor according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The motor includes a stator and a motor rotor 2 according to the above embodiment of the present invention.

[0129] For the motor according to an embodiment of the present invention, by using the motor rotor 2 according to the above embodiment of the present invention, the motor rotor 2 can effectively reduce the fluctuation of the motor torque and the harmonic distortion rate, the motor torque output is more stable, and the working condition adaptability is better.

[0130] The vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes the motor according to the above embodiment of the present invention.

[0131] For the vehicle according to an embodiment of the present invention, by using the motor according to the above embodiment of the present invention, the fluctuation of the motor torque and the harmonic distortion rate can be effectively reduced, the motor torque output is more stable, and the working condition adaptability is better.

[0132] The other components and operations of the rotor punching sheet 1, the motor rotor 2, the motor and the vehicle according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0133] In the description of this specification, the descriptions referring to the terms "specific embodiment", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0134] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor punching (1), characterized in that: include: At least one magnetic pole (100), each of the magnetic poles (100) comprising: A first group of magnet slots (200), the first group of magnet slots (200) comprising a plurality of first magnet slots (210) arranged on two opposite sides of a D axis, the first magnet slots (210) comprising a first slot body (211) and a second slot body (212), the included angle between the first slot body (211) and the second slot body (212) being A; A second group of magnet slots (300) is arranged along the radial direction of the rotor punching sheet (1), the second group of magnet slots (300) is arranged outside the first group of magnet slots (200), and the second group of magnet slots (300) comprises a plurality of second magnet slots (310) arranged on opposite sides of the D axis, and the included angle between the second magnet slots (310) and the Q axis is B; The D axis, the Q axis and the central axis of the rotor punching sheet (1) are perpendicular to each other; A and B satisfy: 0.03≤B / A≤0.

13.

2. The rotor punching (1) according to claim 1, characterized in that: A and B satisfy: 0.06≤B / A≤0.

1.

3. The rotor punching sheet (1) according to claim 1, characterized in that: The A satisfies: 110°≤A≤180°.

4. The rotor punching sheet (1) according to claim 1, characterized in that: The B satisfies: 0≤B≤15°.

5. The rotor punching (1) according to claim 1, characterized in that: A plurality of the first magnet slots (210) are symmetrically arranged about the D axis.

6. The rotor punching (1) according to claim 1, characterized in that: A plurality of the second magnet slots (310) are symmetrically arranged about the D axis.

7. The rotor punching (1) according to claim 1, characterized in that: The invention also comprises a first magnetic component (510) and a second magnetic component (520), wherein the first magnetic component (510) is arranged on the first section of the slot body (211), and the second magnetic component (520) is arranged on the second section of the slot body (212), and the first magnetic component (510) and the second magnetic component (520) share the first magnetic slot (210).

8. The rotor punching (1) according to claim 1, characterized in that: The rotor punching sheet (1) is configured with a first connecting rib (220), wherein the first connecting rib (220) is arranged between the first section slot body (211) and the second section slot body (212).

9. The rotor punching sheet (1) according to claim 1, characterized in that: The first section of the slot body (211) is adjacent to the D axis relative to the second section of the slot body (212), and the included angle between the first section of the slot body (211) and the Q axis is C, and C satisfies: -15°≤C≤15°.

10. The rotor punching (1) according to claim 9, characterized in that The included angle between the first section of the slot body (211) located on one side of the D axis and the Q axis is C1, and the included angle between the first section of the slot body (211) located on the other side of the D axis and the Q axis is C2; Wherein, C1 and C2 satisfy: 0.07≤C1 / C2≤15.

11. The rotor punching (1) according to claim 1, characterized in that The plurality of first magnet slots (210) are asymmetrically arranged about the D axis.

12. The rotor punching (1) according to claim 1, characterized in that The plurality of second magnet slots (310) are asymmetrically arranged about the D axis.

13. The rotor punching (1) according to claim 1, characterized in that The second magnet slot (310) comprises a third slot section (311) and a fourth slot section (312); the third slot section (311) is adjacent to the D axis relative to the fourth slot section (312); and the B is formed between the third slot section (311) and the Q axis.

14. The rotor lamination (1) according to claim 13, characterized in that The included angle between the third section of the slot body (311) located on one side of the D axis and the Q axis is B1, and the included angle between the third section of the slot body (311) located on the other side of the D axis and the Q axis is B2; Wherein, B1 and B2 satisfy: 0.07≤B1 / B2≤15.

15. The rotor sheet (1) according to claim 13, characterized in that The rotor punching sheet (1) is configured with a second connecting rib (320), wherein the second connecting rib (320) is arranged between the third section slot body (311) and the fourth section slot body (312).

16. The rotor sheet (1) according to claim 13, characterized in that It also includes a third magnetic component (530) and a fourth magnetic component (540), wherein the third magnetic component (530) is arranged on the third section slot body (311), and the fourth magnetic component (540) is arranged on the fourth section slot body (312), and the third magnetic component (530) and the fourth magnetic component (540) share the second magnetic slot (310).

17. The rotor sheet (1) according to claim 9, characterized in that There are a plurality of magnetic poles (100), at least a portion of the plurality of magnetic poles (100) are a plurality of first magnetic poles (110), and at least a portion of the plurality of magnetic poles (100) are a plurality of second magnetic poles (120), and the B and / or the C of the first magnetic pole (110) and the second magnetic pole (120) are different.

18. The rotor sheet (1) according to claim 17, characterized in that A plurality of the first magnetic poles (110) are arranged adjacent to each other, and a plurality of the second magnetic poles (120) are arranged adjacent to each other.

19. The rotor sheet (1) according to claim 17, characterized in that The first magnetic poles (110) and the second magnetic poles (120) are arranged alternately and spaced one by one.

20. A motor rotor (2), characterized in that: include: A rotor core, the rotor core comprising a plurality of rotor punching sheets (1) according to any one of claims 1 to 19, wherein the plurality of rotor punching sheets (1) are stacked.

21. A motor, characterized in that: It comprises a stator and a rotor of the electric machine according to claim 20.

22. A vehicle, characterized in that: Comprising an electric machine according to claim 21.

Images