Rotor punching sheet, motor rotor, motor and vehicle

Abstract

The present invention discloses a rotor punching sheet, a motor rotor, a motor and a vehicle. The rotor punching sheet includes: a plurality of first magnet slots, the plurality of first magnet slots are arranged along the circumferential direction of the rotor punching sheet and are provided on opposite sides of the D axis. Each first magnet slot includes a first section of the slot body and a second section of the slot body. The first section of the slot body is closer to the D axis than the second section of the slot body. The included angle between the first section of the slot body and the Q axis is A1, and the included angle between the first section of the slot body and the second section of the slot body is B1; wherein, the D axis, the Q axis and the central axis of the rotor punching sheet are perpendicular to each other; the included angle A1 and the included angle B1 satisfy: 0.03 ≤ A1 / B1 ≤ 0.13. According to the embodiment of the present invention, the rotor punching sheet has a better magnetic flux concentration effect, which is beneficial to improving the overall magnetic flux, torque output and motor efficiency of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular 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 achieved. Moreover, the motor rotor generally includes a rotor punching sheet, and a plurality of magnet slots for installing permanent magnets are provided on the rotor punching sheet.

[0003] However, due to the unreasonable arrangement of the magnet slots and the setting of the magnetic circuit structure in the related art, the magnetic flux concentration effect of the motor rotor is poor, resulting in low magnetic flux utilization rate of the motor, low torque output of the motor and low motor efficiency. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a rotor punching sheet, and the rotor punching sheet has a better magnetic flux concentration effect, which is beneficial to improving the overall magnetic flux, torque output and motor efficiency of the motor.

[0005] The present invention also provides a motor rotor having the above rotor punching sheet.

[0006] The present invention also provides a motor having the above motor rotor.

[0007] The present invention also provides a vehicle having the above motor.

[0008] To achieve the above object, according to a first aspect embodiment of the present invention, a rotor punching sheet is provided, including: a plurality of first magnet slots, the plurality of first magnet slots are arranged along the circumferential direction of the rotor punching sheet and are provided on opposite sides of the D axis, each first magnet slot includes a first section slot body and a second section slot body, the first section slot body is closer to the D axis than the second section slot body, the included angle between the first section slot body and the Q axis is A1, and the included angle between the first section slot body and the second section slot body is B1; wherein, the D axis, the Q axis and the central axis of the rotor punching sheet are perpendicular to each other; the included angle A1 and the included angle B1 satisfy: 0.03 ≤ A1 / B1 ≤ 0.13.

[0009] Thus, the magnetic flux concentration effect of the motor rotor according to the embodiment of the present invention is better, which is beneficial to improving the overall magnetic flux, torque output and motor efficiency of the motor.

[0010] According to some embodiments of the present invention, the included angle A1 and the included angle B1 satisfy: 0.07 ≤ A1 / B1 ≤ 0.1.

[0011] According to some embodiments of the present invention, the included angle A1 satisfies: -15° ≤ A1 ≤ 15°.

[0012] According to some embodiments of the present invention, the included angle B1 satisfies: 110° ≤ B1 ≤ 180°.

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

[0014] According to some embodiments of the present invention, a plurality of the first magnet slots are asymmetrically arranged with respect to the D axis.

[0015] According to some embodiments of the present invention, the rotor punching also includes: a first magnetic member and a second magnetic member. The first magnetic member is disposed in the first section of the slot body, and the second magnetic member is disposed in the second section 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 invention, the rotor punching is configured with a first connecting rib, and the first connecting rib is disposed between the first section of the slot body and the second section of the slot body.

[0017] According to some embodiments of the present invention, the width of the first connecting rib between the first section of the slot body and the second section of the slot body on one side of the D axis is L1, the width of the first connecting rib between the first section of the slot body and the second section of the slot body on the other side of the D axis is L2, and the width of the first connecting rib between adjacent two of the first magnet slots is L3; wherein, L1 = L2 = 0; and L3 satisfies: 0.7 mm ≤ L3 ≤ 2.6 mm.

[0018] According to some embodiments of the present invention, the width of the first connecting rib between the first section of the slot body and the second section of the slot body on one side of the D axis is L1, the width of the first connecting rib between the first section of the slot body and the second section of the slot body on the other side of the D axis is L2, and the width of the first connecting rib between adjacent two of the first magnet slots is L3; wherein, L1 satisfies: 0.6 mm ≤ L1 ≤ 2.5 mm; L2 satisfies: 0.6 mm ≤ L2 ≤ 2.5 mm; L3 satisfies: 0.7 mm ≤ L3 ≤ 2.6 mm.

[0019] According to some embodiments of the present invention, the rotor punching also includes: a plurality of second magnet slots. The plurality of second magnet slots are disposed outside the first magnet slots along the radial direction of the rotor punching. The plurality of second magnet slots are disposed on opposite sides of the D axis, and the plurality of first magnet slots and the plurality of second magnet slots form a magnetic pole.

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

[0021] According to some embodiments of the present invention, a plurality of the second magnet slots are asymmetrically arranged with respect to the D axis.

[0022] According to some embodiments of the present invention, each of the second magnet slots includes a third slot body and a fourth slot body. The third slot body is closer to the D axis than the fourth slot body. The included angle between the third slot body and the Q axis is A2, and the included angle between the third slot body and the fourth slot body is B2. Wherein, the included angle A2 and the included angle B2 satisfy: 0.03 ≤ A2 / B2 ≤ 0.11.

[0023] According to some embodiments of the present invention, the rotor punching sheet further includes: a third magnetic member and a fourth magnetic member. The third magnetic member is disposed in the third slot body, the fourth magnetic member is disposed in the fourth slot body, and the third magnetic member and the fourth magnetic member share the second magnet slot.

[0024] According to some embodiments of the present invention, the rotor punching sheet is configured with a second connecting rib, and the second connecting rib is disposed between the third slot body and the fourth slot body.

[0025] According to some embodiments of the present invention, the width of the second connecting rib between the third slot body and the fourth slot body on one side of the D axis is L4, the width of the second connecting rib between the third slot body and the fourth slot body on the other side of the D axis is L5, and the width of the second connecting rib between two adjacent second magnet slots is L6. Wherein, L4 = L5 = 0; and L6 satisfies: 0.6 mm ≤ L6 ≤ 0.9 mm.

[0026] According to some embodiments of the present invention, the width of the second connecting rib between the third slot body and the fourth slot body on one side of the D axis is L4, the width of the second connecting rib between the third slot body and the fourth slot body on the other side of the D axis is L5, and the width of the second connecting rib between two adjacent second magnet slots is L6. Wherein, L4 satisfies: 0.5 mm ≤ L4 ≤ 0.8 mm; L5 satisfies: 0.5 mm ≤ L5 ≤ 0.8 mm; L6 satisfies: 0.6 mm ≤ L6 ≤ 0.9 mm.

[0027] According to some embodiments of the present invention, the included angle A2 satisfies: -15° ≤ A2 ≤ 15°.

[0028] According to some embodiments of the present invention, the included angle B2 satisfies: 130° ≤ B2 ≤ 180°.

[0029] According to some embodiments of the present invention, the rotor punching also includes: at least one magnetic resistance slot, which is arranged between the first magnet slot and the outer peripheral edge of the rotor punching.

[0030] According to some embodiments of the present invention, there are a plurality of the magnetic resistance slots, and a third connecting rib is constructed between two adjacent magnetic resistance slots of the rotor punching. The width of the third connecting rib is L7, and L7 satisfies: 0.5 mm ≤ L7 ≤ 1 mm.

[0031] According to some embodiments of the present invention, along the radial direction of the rotor punching, the maximum distance between the magnetic resistance slot and the outer peripheral edge of the rotor punching is L8, and L8 satisfies: 0.6 ≤ L8 ≤ 1 mm.

[0032] According to some embodiments of the present invention, the cross-sectional shape of the magnetic resistance slot is circular, rectangular or triangular.

[0033] According to a second aspect embodiment of the present invention, a motor rotor is provided, which includes: a rotor core, and the rotor core includes a plurality of rotor punchings according to the first aspect embodiment of the present invention, and the plurality of rotor punchings are stacked.

[0034] According to the motor rotor of the second aspect embodiment of the present invention, by using the rotor punching according to the first aspect embodiment of the present invention, the overall magnetic flux of the motor can be improved, and the torque output and the motor efficiency of the motor are relatively high.

[0035] According to a third aspect embodiment of the present invention, a motor is provided, and the motor includes the motor rotor according to the second aspect embodiment of the present invention.

[0036] According to the motor of the third aspect embodiment of the present invention, by using the motor rotor according to the second aspect embodiment of the present invention, the overall magnetic flux of the motor can be improved, and the torque output and the motor efficiency of the motor are relatively high.

[0037] According to a fourth aspect embodiment of the present invention, a vehicle is provided, and the vehicle includes the motor according to the third aspect embodiment of the present invention.

[0038] According to the vehicle of the fourth aspect embodiment of the present invention, by using the motor according to the third aspect embodiment of the present invention, it has the advantages of a large overall magnetic flux of the motor, a relatively high torque output and motor efficiency of the motor.

[0039] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0041] Figure 1 is a schematic structural diagram of a motor rotor according to the first embodiment of the present invention;

[0042] Figure 2 is a schematic structural diagram of a motor rotor according to the second embodiment of the present invention;

[0043] Figure 3 is a schematic structural diagram of a motor rotor according to the third embodiment of the present invention;

[0044] Figure 4 is a schematic structural diagram of a motor rotor according to the fourth embodiment of the present invention;

[0045] Figure 5 is a partial structural diagram of the first type of magnetic pole of the motor rotor according to the embodiment of the present invention;

[0046] Figure 6 is a partial structural diagram of the second type of magnetic pole of the motor rotor according to the embodiment of the present invention;

[0047] Figure 7 is a partial structural diagram of the third type of magnetic pole of the motor rotor according to the embodiment of the present invention;

[0048] Figure 8 is a partial structural diagram of the fourth type of magnetic pole of the motor rotor according to the embodiment of the present invention;

[0049] Figure 9 is a partial structural diagram of the fifth type of magnetic pole of the motor rotor according to the embodiment of the present invention;

[0050] Figure 10 is a partial structural diagram of the sixth type of magnetic pole of the motor rotor according to the embodiment of the present invention;

[0051] Figure 11 is a comparative curve graph of the back electromotive force between the embodiment of the present invention and the existing solution;

[0052] Figure 12 is a comparative bar graph of the magnetic flux linkage between the embodiment of the present invention and the existing solution;

[0053] Figure 13 is a comparative curve graph of the external characteristics between the embodiment of the present invention and the existing solution;

[0054] Figure 14 is a comparative bar graph of the proportion of the high-efficiency region between the embodiment of the present invention and the existing solution;

[0055] Figure 15It is another bar chart comparing the high-efficiency area ratio according to an embodiment of the present invention and the existing solution;

[0056] Reference numerals:

[0057] 1. Rotor punching sheet; 2. Motor rotor;

[0058] 100. Magnetic pole;

[0059] 210. First magnet slot; 211. First section of the slot body; 212. Second section of the slot body; 220. First connecting rib;

[0060] 310. Second magnet slot; 311. Third section of the slot body; 312. Fourth section of the slot body; 320. Second connecting rib;

[0061] 410. Magnetic resistance slot; 411. Third connecting rib; 420. Weight reduction hole;

[0062] 510. First magnetic member; 520. Second magnetic member; 530. Third magnetic member; 540. Fourth magnetic member. Detailed implementation manners

[0063] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the 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 drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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.

[0065] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0066] 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.

[0067] The rotor punching sheet 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0068] As Figures 1 - 10As shown, the rotor punching sheet 1 according to an embodiment of the present invention includes a plurality of first magnet slots 210.

[0069] The plurality of first magnet slots 210 are arranged along the circumferential direction of the rotor punching sheet 1 and are provided on opposite sides of the D-axis. Each first magnet slot 210 includes a first section slot body 211 and a second section slot body 212. The first section slot body 211 is closer to the D-axis than the second section slot body 212. The angle between the first section slot body 211 and the Q-axis is A1, and the angle between the first section slot body 211 and the second section slot body 212 is B1.

[0070] Wherein, the D-axis, the Q-axis and the central axis of the rotor punching sheet 1 are perpendicular to each other; the angle A1 and the angle B1 satisfy: 0.03 ≤ A1 / B1 ≤ 0.13.

[0071] 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 the plurality of first magnet slots 210 can be symmetrically arranged with respect to the D-axis.

[0072] Wherein, the angle between the first section slot body 211 and the Q-axis is A1, which means that the central axis in the width direction of the first section slot body 211 and the Q-axis form an angle A1. In addition, it should be noted that the angle A1 refers to the acute angle formed between the central axis in the width direction of the first section slot body 211 and the Q-axis. And, the angle between the first section slot body 211 and the second section slot body 212 is B1, which means that the central axis in the width direction of the first section slot body 211 and the central axis in the width direction of the second section slot body 212 form an angle B1.

[0073] For the rotor punching sheet 1 according to an embodiment of the present invention, by making 0.03 ≤ A1 / B1 ≤ 0.13, for example, A1 / B1 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. In this way, A1 / B1 is not less than 0.03, which can avoid A1 being too small or B1 being too large, and is beneficial to improving the magnetic flux concentration effect between the first magnet slot 210 and other layer magnet slots, and thus can improve the torque output of the motor. And, A1 / B1 is not greater than 0.13, which can avoid A1 being too large or B1 being too small, and is beneficial to reducing the magnetic flux density between the first magnet slot 210 and other layer magnet slots, and thus can reduce the iron loss of the motor and is beneficial to improving the motor efficiency.

[0074] Specifically, as shown in the test data in Table 1 below, when 0.03 ≤ A1 / B1 ≤ 0.13, the no-load air-gap magnetic flux density can be relatively low, the iron loss can be relatively small, and the peak torque can also be relatively large. That is to say, when 0.03 ≤ A1 / B1 ≤ 0.13, the motor can take into account the advantages of low no-load air-gap magnetic flux density, small iron loss and large peak torque, thereby can greatly improve the motor efficiency.

[0075] Table 1

[0076]

[0077] Thus, according to the embodiments of the present invention, the magnetic flux concentration effect of the motor rotor 2 is better, which is beneficial to improving the overall magnetic flux, torque output and motor efficiency of the motor.

[0078] In some specific embodiments of the present invention, such as Figure 1 and Figure 2 as shown, the included angles A1 and B1 satisfy: 0.07 ≤ A1 / B1 ≤ 0.1.

[0079] For example, A1 / B1 can be 0.07, 0.08, 0.09 or 0.1.

[0080] With such a setting, A1 / B1 will not be less than 0.07, which can further avoid A1 being too small or B1 being too large, and more effectively improve the magnetic flux concentration effect between the first magnet slot 210 and other layer magnet slots. Furthermore, the torque output of the motor can be more significantly improved. And A1 / B1 will not be greater than 0.1, which further avoids A1 being too large or B1 being too small, and is more beneficial to reducing the magnetic density between the first magnet slot 210 and other layer magnet slots. Furthermore, the iron loss of the motor can be effectively reduced to improve the motor efficiency.

[0081] In some specific embodiments of the present invention, such as Figure 1 and Figure 2 as shown, the included angle A1 satisfies: -15° ≤ A1 ≤ 15°.

[0082] For example, the included angle A1 can be -15°, -13°, -11°, -9°, -7°, -5°, -3°, -1°, 0°, 1°, 3°, 5°, 7°, 9°, 11°, 13° or 15°. And it should be noted that when the included angle A1 is negative, it means that one end of the first section of the slot body 211 far from the D-axis inclines towards the central axis of the rotor punching sheet 1. At this time, the included angle A1 between the central axis in the width direction of the first section of the slot body 211 and the Q-axis is negative; and when the included angle A1 is positive, it means that one end of the first section of the slot body 211 far from the D-axis inclines away from the central axis of the rotor punching sheet 1. At this time, the included angle A1 between the central axis in the width direction of the first section of the slot body 211 and the Q-axis is positive.

[0083] By setting -15° ≤ A1 ≤ 15°, this can avoid the decrease of the magnetic flux concentration effect of the motor caused by too large A1 value, which is beneficial to improving the overall magnetic flux of the motor, and thus the motor can output high torque.

[0084] In some specific embodiments of the present invention, such as Figure 1 andFigure 2 As shown, the included angle B1 satisfies: 110° ≤ B1 ≤ 180°. For example, the included angle B1 can be 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175° or 180°. Among them, when B2 is 180°, that is, the first-stage slot body 211 and the second-stage slot body 212 are parallel.

[0085] In this way, not only can it avoid the magnetic density between the first magnet slot 210 and the magnet slots of other layers being too high due to too small B1 value, which is beneficial to reducing the iron loss of the motor, thereby improving the motor efficiency, but also can avoid the decline of the magnetic focusing effect of the motor due to too large B1 value, which is beneficial to increasing the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0086] In some specific embodiments of the present invention, such as Figure 1 As shown, multiple first magnet slots 210 are symmetrically arranged about the D axis. With this arrangement, the arrangement structure of the multiple first magnet slots 210 can be more uniform, facilitating the magnetic flux of the magnetic circuit in the motor rotor 2 and facilitating the magnetic focusing design of the magnetic circuit, thereby reducing magnetic leakage and being beneficial to increasing the output torque of the motor.

[0087] In some other specific embodiments of the present invention, the multiple first magnet slots 210 are asymmetrically arranged about the D axis.

[0088] With this arrangement, it is possible to 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 diverse, enabling the motor to better adapt to different working conditions.

[0089] In some specific embodiments of the present invention, such as Figure 1 , Figure 8 and Figure 9 As shown, the rotor punching sheet 1 further includes a first magnetic member 510 and a second magnetic member 520.

[0090] The first magnetic member 510 is arranged in the first-stage slot body 211, the second magnetic member 520 is arranged in the second-stage slot body 212, and the first magnetic member 510 and the second magnetic member 520 share the first magnet slot 210.

[0091] 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 arranged 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, which can simplify the structure of the first magnet slot 210, and further simplify the structure of the rotor punching sheet 1, facilitating processing.

[0092] Wherein, first connecting ribs 220 may be provided between multiple first magnet slots 210, that is, two adjacent first magnet slots 210 are separated by the first connecting ribs 220.

[0093] In some specific embodiments of the present invention, such as Figures 2 - 4 as shown, the rotor punching sheet 1 is configured with first connecting ribs 220, and the first connecting ribs 220 are arranged between the first-stage slot body 211 and the second-stage slot body 212.

[0094] Moreover, the first connecting ribs 220 may be arranged between two adjacent first magnet slots 210.

[0095] That is, the first-stage slot body 211 and the second-stage slot body 212 can be separated by the first connecting ribs 220, and two adjacent first magnet slots 210 can also be separated by the first connecting ribs 220.

[0096] With such an arrangement, 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 arranged in the two independent slot bodies. Thus, by arranging the first connecting ribs 220, the structural layout 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, which is beneficial to improving the torque output of the motor.

[0097] In some specific embodiments of the present invention, such as Figure 4 and Figure 8 as shown, the width of the first connecting rib 220 between the first-stage slot body 211 and the second-stage slot body 212 on one side of the D axis is L1, the width of the first connecting rib 220 between the first-stage slot body 211 and the second-stage slot body 212 on the other side of the D axis is L2, and the width of the first connecting rib 220 between two adjacent first magnet slots 210 is L3.

[0098] Wherein, L1 = L2 = 0; and L3 satisfies: 0.7 mm ≤ L3 ≤ 2.6 mm.

[0099] Wherein, the width of the first connecting rib 220 between the first-stage slot body 211 and the second-stage slot body 212 is 0, that is, no first connecting rib 220 is provided between the first-stage slot body 211 and the second-stage slot body 212, and only the first connecting rib 220 is provided between two adjacent first magnet slots 210.

[0100] For example, the width L3 of the first connecting rib 220 between two adjacent first magnet slots 210 may be 0.7 mm, 0.9 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 2.0 mm, 2.2 mm, 2.4 mm or 2.6 mm.

[0101] With such a setting, on the one hand, it can avoid the width value of L3 being too small, thereby avoiding excessive processing difficulty of the first connecting rib 220, and enabling the structural strength of the first connecting rib 220 to be relatively large, avoiding deformation or fracture of the first connecting rib 220, which is beneficial to improving the overall structural strength of the rotor punching sheet 1. On the other hand, it can avoid the width value of L3 being too large, thereby avoiding excessive magnetic leakage of the motor, which is beneficial to improving the output torque and efficiency of the motor.

[0102] In some specific embodiments of the present invention, as Figure 4 shown, the width of the first connecting rib 220 between the first slot body 211 and the second slot body 212 on one side of the D axis is L1, the width of the first connecting rib 220 between the first slot body 211 and the second slot body 212 on the other side of the D axis is L2, and the width of the first connecting rib 220 between two adjacent first magnet slots 210 is L3.

[0103] Among them, L1 satisfies: 0.6 mm ≤ L1 ≤ 2.5 mm; L2 satisfies: 0.6 mm ≤ L2 ≤ 2.5 mm; L3 satisfies: 0.7 mm ≤ L3 ≤ 2.6 mm.

[0104] For example, the width L1 of the first connecting rib 220 between the first slot body 211 and the second slot body 212 on one side of the D axis may be 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 2.0 mm, 2.2 mm, 2.4 mm or 2.5 mm; the width L2 of the first connecting rib 220 between the first slot body 211 and the second slot body 212 on the other side of the D axis may be 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 2.0 mm, 2.2 mm, 2.4 mm or 2.5 mm; the width L3 of the first connecting rib 220 between two adjacent first magnet slots 210 may be 0.7 mm, 0.9 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 2.0 mm, 2.2 mm, 2.4 mm or 2.6 mm. And any two of L1, L2 and L3 may be the same or different.

[0105] By setting it in this way, on the one hand, it can avoid the width values of L1, L2 or L3 being too small, thereby avoiding the excessive processing difficulty of the first connecting rib 220, and enabling the structural strength of the first connecting rib 220 to be relatively large, avoiding deformation or fracture of the first connecting rib 220, which is beneficial to improving the overall structural strength of the rotor punching sheet 1. On the other hand, it can avoid the width values of L1, L2 or L3 being too large, thereby avoiding excessive magnetic leakage in the motor, which is beneficial to improving the output torque and motor efficiency of the motor.

[0106] In some specific embodiments of the present invention, such as Figures 1 - 4 as shown, the rotor punching sheet 1 further includes a plurality of second magnet slots 310.

[0107] The plurality of second magnet slots 310 are arranged on the outer side of the first magnet slot 210 along the radial direction of the rotor punching sheet 1. The plurality of second magnet slots 310 are arranged on opposite sides of the D-axis, and the plurality of first magnet slots 210 and the plurality of second magnet slots 310 form a magnetic pole 100.

[0108] Among them, the plurality of first magnet slots 210 can form one layer of magnet slots, the plurality of second magnet slots 310 can form another layer of magnet slots, and each magnetic pole 100 can include multiple layers of magnet slots. By adjusting the arrangement mode and setting angle of the multiple magnet slots of each magnetic pole 100, the geometric shape, arrangement mode and magnetic circuit structure of the magnetic part can be optimized, so as to improve the magnetic focusing effect of the motor rotor 2, make the magnetic field superimposed and enhanced in a specific area, and further improve the magnetic flux and magnetic field utilization rate of the motor, as well as improve the torque and power of the motor.

[0109] In some specific embodiments of the present invention, such as Figures 1 - 4 as shown, the plurality of second magnet slots 310 are symmetrically arranged about the D-axis. In this way, the arrangement structure of the plurality of second magnet slots 310 can be more uniform, so as to facilitate the magnetic flux of the magnetic circuit in the motor rotor 2, facilitate the magnetic focusing design of the magnetic circuit, and further reduce magnetic leakage, which is beneficial to improving the output torque of the motor.

[0110] In some other specific embodiments of the present invention, the plurality of second magnet slots 310 are asymmetrically arranged about the D-axis.

[0111] By setting it in this way, it can more effectively artificially create a partial magnetic field distribution. The different second magnet slots 310 can be non-uniformly distributed, so that the harmonic content of the air-gap magnetic density waveform can be relatively low, thereby avoiding torque fluctuations and electromagnetic noise, so that the output of the motor torque can be more stable. The setting method of the second magnet slots 310 is more diversified, enabling the motor to better adapt to different working conditions.

[0112] In some specific embodiments of the present invention, such as Figures 2 - 4As shown, each second magnet slot 310 includes a third segment slot body 311 and a fourth segment slot body 312.

[0113] The third segment slot body 311 is adjacent to the D axis relative to the fourth segment slot body 312. The included angle between the third segment slot body 311 and the Q axis is A2, and the included angle between the third segment slot body 311 and the fourth segment slot body 312 is B2.

[0114] Wherein, the included angle A2 and the included angle B2 satisfy: 0.03 ≤ A2 / B2 ≤ 0.11.

[0115] By setting 0.03 ≤ A2 / B2 ≤ 0.11, for example, A2 / B2 can be 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10 or 0.11. In this way, A2 / B2 will not be less than 0.03, which can avoid A2 being too small or B2 being too large, and is beneficial to improving the magnetic concentration effect between the second magnet slot 310 and the magnet slots of other layers, thereby improving the torque output of the motor. Moreover, A2 / B2 will not be greater than 0.11, which can avoid A2 being too large or B2 being too small, and is beneficial to reducing the magnetic flux density between the second magnet slot 310 and the magnet slots of other layers, thereby reducing the iron loss of the motor and being beneficial to improving the motor efficiency.

[0116] In some specific embodiments of the present invention, such as Figure 1 , Figure 5 and Figure 9 as shown, the rotor punching 1 further includes a third magnetic member 530 and a fourth magnetic member 540.

[0117] The third magnetic member 530 is disposed in the third segment slot body 311, the fourth magnetic member 540 is disposed in the fourth segment slot body 312, and the third magnetic member 530 and the fourth magnetic member 540 share the second magnet slot 310.

[0118] That is to say, the third segment slot body 311 and the fourth segment slot body 312 are communicated, and the third magnetic member 530 and the fourth magnetic member 540 are respectively disposed in the third segment slot body 311 and the fourth segment slot body 312. 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 1, facilitating processing.

[0119] Wherein, a second connecting rib 320 may be provided between multiple second magnet slots 310, that is, two adjacent second magnet slots 310 are separated by a first connecting rib 220.

[0120] In some other specific embodiments of the present invention, such as Figures 2 - 4 as shown, the rotor punching 1 is configured with a second connecting rib 320, and the second connecting rib 320 is disposed between the third segment slot body 311 and the fourth segment slot body 312.

[0121] Moreover, a second connecting rib 320 may also be provided between two adjacent second magnet grooves 310.

[0122] That is, the third section groove body 311 and the fourth section groove body 312 may be separated by the second connecting rib 320, and two adjacent second magnet grooves 310 may also be separated by the second connecting rib 320.

[0123] With this setting, the third section groove body 311 and the fourth section groove body 312 can be two independent groove bodies, and the third magnetic member 530 and the fourth magnetic member 540 can be respectively arranged in the two independent groove bodies. Thus, by providing the second connecting rib 320, the structural arrangement of the second magnet groove 310 can be more diversified, so as to optimize the magnetic circuit of the motor rotor 2, further reduce magnetic leakage, and be beneficial to improving the torque output of the motor.

[0124] In some specific embodiments of the present invention, such as Figure 4 and Figure 5 as shown, the width of the second connecting rib 320 between the third section groove body 311 and the fourth section groove body 312 on one side of the D axis is L4, the width of the second connecting rib 320 between the third section groove body 311 and the fourth section groove body 312 on the other side of the D axis is L5, and the width of the second connecting rib 320 between two adjacent second magnet grooves 310 is L6.

[0125] Wherein, L4 = L5 = 0; and L6 satisfies: 0.6 mm ≤ L6 ≤ 0.9 mm.

[0126] Wherein, the width of the second connecting rib 320 between the third section groove body 311 and the fourth section groove body 312 is 0, that is, the second connecting rib 320 is not provided between the third section groove body 311 and the fourth section groove body 312, and the second connecting rib 320 is only provided between two adjacent second magnet grooves 310.

[0127] For example, the width L6 of the second connecting rib 320 between two adjacent second magnet grooves 310 may be 0.6 mm, 0.7 mm, 0.8 mm or 0.9 mm.

[0128] With this setting, on the one hand, it can avoid the width value of L6 being too small, further avoid the processing technology difficulty of the second connecting rib 320 being too large, and make the structural strength of the second connecting rib 320 relatively large, avoid the second connecting rib 320 from deforming or breaking, and be beneficial to improving the overall structural strength of the rotor punching sheet 1. On the other hand, it can avoid the width value of L6 being too large, further avoid the magnetic leakage of the motor being too large, and be beneficial to improving the output torque and efficiency of the motor.

[0129] In some other specific embodiments of the present invention, such as Figure 4As shown, the width of the second connecting rib 320 between the third slot body 311 and the fourth slot body 312 on one side of the D axis is L4, the width of the second connecting rib 320 between the third slot body 311 and the fourth slot body 312 on the other side of the D axis is L5, and the width of the second connecting rib 320 between two adjacent second magnet slots 310 is L6.

[0130] Among them, L4 satisfies: 0.5 mm ≤ L4 ≤ 0.8 mm; L5 satisfies: 0.5 mm ≤ L5 ≤ 0.8 mm; L6 satisfies: 0.6 mm ≤ L6 ≤ 0.9 mm.

[0131] For example, the width L4 of the second connecting rib 320 between the third slot body 311 and the fourth slot body 312 on one side of the D axis can be 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm; the width L5 of the second connecting rib 320 between the third slot body 311 and the fourth slot body 312 on the other side of the D axis can be 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm; the width L6 of the second connecting rib 320 between two adjacent second magnet slots 310 can be 0.6 mm, 0.7 mm, 0.8 mm or 0.9 mm. And any two of L4, L5 and L6 can be the same or different.

[0132] With such a setting, on the one hand, it can avoid the width value of L4, L5 or L6 being too small, thereby avoiding the excessive processing difficulty of the second connecting rib 320 and enabling the structural strength of the second connecting rib 320 to be relatively large, avoiding deformation or fracture of the second connecting rib 320, which is beneficial to improving the overall structural strength of the motor rotor 2. On the other hand, it can avoid the width value of L4, L5 or L6 being too large, thereby avoiding excessive magnetic leakage of the motor, which is beneficial to improving the output torque and motor efficiency of the motor.

[0133] In some specific embodiments of the present invention, as Figure 2 shown, the included angle A2 satisfies: -15° ≤ A2 ≤ 15°.

[0134] For example, the included angle A2 can be -15°, -13°, -11°, -9°, -7°, -5°, -3°, -1°, 0°, 1°, 3°, 5°, 7°, 9°, 11°, 13° or 15°. And it should be noted that when the included angle A2 is negative, it means that the end of the third slot body 311 far from the D axis is inclined towards the central axis of the rotor punching sheet 1, and at this time, the included angle A2 between the central axis in the width direction of the third slot body 311 and the Q axis is negative; and when the included angle A2 is positive, it means that the end of the third slot body 311 far from the D axis is inclined away from the central axis of the rotor punching sheet 1, and at this time, the included angle A2 between the central axis in the width direction of the third slot body 311 and the Q axis is positive.

[0135] By setting -15° ≤ A2 ≤ 15°, the decrease in the magnetic flux concentration effect of the motor caused by too large a value of A2 can be avoided, which is beneficial to improving the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0136] In some specific embodiments of the present invention, such as Figure 2 shown, the included angle B2 satisfies: 130° ≤ B2 ≤ 180°.

[0137] For example, the included angle B2 can be 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175° or 180°. Among them, when B2 is 180°, that is, the third segment of the slot body 311 and the fourth segment of the slot body 312 are parallel.

[0138] In this way, not only can the too high magnetic density between the second magnet slot 310 and the magnet slots of other layers caused by too small a value of B2 be avoided, which is beneficial to reducing the iron loss of the motor, thereby improving the motor efficiency, but also the decrease in the magnetic flux concentration effect of the rotor motor caused by too large a value of B2 can be avoided, which is beneficial to improving the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0139] In some specific embodiments of the present invention, such as Figures 2 - 4 shown, the rotor punching 1 further includes at least one magnetic resistance slot 410, and the magnetic resistance slot 410 is arranged between the first magnet slot 210 and the outer peripheral edge of the rotor punching 1.

[0140] By constructing the magnetic resistance slot 410, the magnetic circuit can be partitioned at the corresponding position of the rotor punching 1 by using the magnetic resistance slot 410, and then the setting of the magnetic circuit can be corrected by using the magnetic resistance slot 410, so as to change the structure of the magnetic circuit, make the magnetic field superimposed and enhanced in a specific area, and the magnetic flux concentration effect of the magnetic circuit is better, further reducing the magnetic leakage of the motor, thereby being beneficial to improving the magnetic flux of the motor, improving the magnetic field utilization rate, and improving the torque and power of the motor, as well as improving the power density and torque density of the motor.

[0141] In some specific embodiments of the present invention, such as Figures 2 - 4 shown, there are multiple magnetic resistance slots 410, and the rotor punching 1 is provided with a third connecting rib 411 between two adjacent magnetic resistance slots 410, and the width of the third connecting rib 411 is L7, and L7 satisfies: 0.5 mm ≤ L7 ≤ 1 mm.

[0142] For example, the width L7 of the third connecting rib 411 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0143] By setting it this way, on the one hand, it can avoid the width L7 of the third connecting rib 411 from being too small, thereby avoiding excessive processing difficulty of the third connecting rib 411, and enabling the structural strength of the third connecting rib 411 to be relatively large, preventing the third connecting rib 411 from deforming or breaking, which is beneficial to improving the overall structural strength of the rotor punching sheet 1. On the other hand, it can avoid the width L7 of the third connecting rib 411 from being too large, thereby avoiding excessive magnetic leakage in the motor, which is beneficial to improving the output torque and efficiency of the motor.

[0144] In some specific embodiments of the present invention, such as Figure 4 As shown, along the radial direction of the rotor punching sheet 1, the maximum distance between the magnetic blocking groove 410 and the outer peripheral edge of the rotor punching sheet 1 is L8, and L8 satisfies: 0.6 ≤ L8 ≤ 1 mm.

[0145] For example, the maximum distance L8 between the magnetic blocking groove 410 and the outer peripheral edge of the rotor punching sheet 1 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0146] By setting it this way, on the one hand, it can avoid the distance between the magnetic blocking groove 410 and the outer peripheral edge of the rotor punching sheet 1 from being too small, thereby avoiding excessive processing difficulty of the structure between the magnetic blocking groove 410 and the outer peripheral edge of the rotor punching sheet 1, and enabling the structural strength of the structure between the magnetic blocking groove 410 and the outer peripheral edge of the rotor punching sheet 1 to be relatively large, preventing this part of the structure from deforming or breaking, which is beneficial to improving the overall structural strength of the rotor punching sheet 1. On the other hand, it can avoid the distance between the magnetic blocking groove 410 and the outer peripheral edge of the rotor punching sheet 1 from being too large, thereby avoiding excessive magnetic leakage in the motor, which is beneficial to improving the output torque and efficiency of the motor.

[0147] In some specific embodiments of the present invention, such as Figures 2 - 10 As shown, the cross-sectional shape of the magnetic blocking groove 410 is circular, rectangular or triangular.

[0148] Among them, the cross-sectional shape of the magnetic blocking groove 410 may not be limited. When there is one magnetic blocking groove 410, the cross-sectional shape of the magnetic blocking groove 410 can be one of circular, rectangular or triangular; and when there are multiple magnetic blocking grooves 410, the cross-sectional shapes of the multiple magnetic blocking grooves 410 can be one of circular, rectangular or triangular or a combination of multiple.

[0149] In addition, the rotor core 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 core and are arranged at intervals along the circumferential direction of the rotor core.

[0150] Next, the advantages of the improvement of the present invention will be illustrated with reference to the accompanying drawings.

[0151] For example, the rotor punching sheet 1 has six magnetic poles 100. When A1 is selected as 6.7°, B1 is selected as 140°, A2 is selected as 10°, B2 is selected as 155°, L1 = L2 = 0.6 mm, L3 = 0.7 mm, L4 = L5 = 0.5 mm, L6 = 0.6 mm, L7 = 1 mm, and other parameter dimensions of the motor are the same, after calculation, the calculation results of the improved motor are compared with the existing scheme as Figures 11 - 15 As shown, it can be seen that under the condition that other conditions are the same, the magnetic flux concentration design of the present invention can increase the overall magnetic flux of the motor, improve the torque output of the motor, and improve the motor efficiency.

[0152] Next, the motor rotor 2 according to an embodiment of the present invention will be described with reference to the accompanying 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 invention, and the plurality of rotor punching sheets 1 are stacked.

[0153] For the motor rotor 2 according to an embodiment of the present invention, by using the rotor punching sheet 1 according to the above embodiments of the present invention, the overall magnetic flux of the motor can be increased, and the torque output and efficiency of the motor are relatively high.

[0154] Next, the motor according to an embodiment of the present invention will be described with reference to the accompanying drawings. The motor includes the motor rotor 2 according to the above embodiments of the present invention.

[0155] For the motor according to an embodiment of the present invention, by using the motor rotor 2 according to the above embodiments of the present invention, the overall magnetic flux of the motor can be increased, and the torque output and efficiency of the motor are relatively high.

[0156] Next, the vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings. The vehicle includes the motor according to the above embodiments of the present invention.

[0157] For the vehicle according to an embodiment of the present invention, by using the motor according to the above embodiments of the present invention, it has the advantages of a large overall magnetic flux of the motor, a relatively high torque output and efficiency of the motor.

[0158] The other constitutions 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.

[0159] In the description of this specification, the descriptions referring to terms such as "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.

[0160] Although 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 spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor punching sheet (1), characterized in that, Including: A plurality of first magnet slots (210), the plurality of first magnet slots (210) are arranged along the circumferential direction of the rotor punching sheet (1) and are provided on opposite sides of the D-axis. Each first magnet slot (210) includes a first section slot body (211) and a second section slot body (212). The first section slot body (211) is closer to the D-axis than the second section slot body (212). The included angle between the first section slot body (211) and the Q-axis is A1, and the included angle between the first section slot body (211) and the second section slot body (212) is B1; A plurality of second magnet slots (310), the plurality of second magnet slots (310) are arranged along the radial direction of the rotor punching sheet (1) on the outside of the first magnet slots (210). The plurality of second magnet slots (310) are provided on opposite sides of the D-axis, and the plurality of first magnet slots (210) and the plurality of second magnet slots (310) form a magnetic pole (100); Wherein, the D-axis, the Q-axis and the central axis of the rotor punching sheet (1) are perpendicular to each other; The included angle A1 and the included angle B1 satisfy: 0.03 ≤ A1 / B1 ≤ 0.

13.

2. The rotor punching sheet (1) according to claim 1, characterized in that, The included angle A1 and the included angle B1 satisfy: 0.07 ≤ A1 / B1 ≤ 0.

1.

3. The rotor punching sheet (1) according to claim 1, characterized in that, The included angle A1 satisfies: -15° ≤ A1 ≤ 15°.

4. The rotor punching sheet (1) according to claim 1, characterized in that, The included angle B1 satisfies: 110° ≤ B1 ≤ 180°.

5. The rotor punching sheet (1) according to claim 4, characterized in that, The plurality of first magnet slots (210) are symmetrically arranged about the D-axis.

6. The rotor punching sheet (1) according to claim 4, characterized in that, The plurality of first magnet slots (210) are asymmetrically arranged about the D-axis.

7. The rotor punching sheet (1) according to claim 1, characterized in that, Further including: A first magnetic member (510) and a second magnetic member (520), the first magnetic member (510) is arranged in the first section slot body (211), the second magnetic member (520) is arranged in the second section slot body (212), and the first magnetic member (510) and the second magnetic member (520) share the first magnet slot (210).

8. The rotor punching sheet (1) according to claim 1, characterized in that, The rotor punching sheet (1) is configured with a first connecting rib (220), and 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 8, characterized in that, The width of the first connecting rib (220) between the first section slot body (211) and the second section slot body (212) on one side of the D-axis is L1, the width of the first connecting rib (220) between the first section slot body (211) and the second section slot body (212) on the other side of the D-axis is L2, and the width of the first connecting rib (220) between adjacent two first magnet slots (210) is L3; Wherein, L1 = L2 = 0; And L3 satisfies: 0.7 mm ≤ L3 ≤ 2.6 mm.

10. The rotor punching sheet (1) according to claim 8, characterized in that, The width of the first connecting rib (220) between the first section of the groove body (211) and the second section of the groove body (212) on one side of the D axis is L1, and the width of the first connecting rib (220) between the first section of the groove body (211) and the second section of the groove body (212) on the other side of the D axis is L2. The width of the first connecting rib (220) between two adjacent first magnet grooves (210) is L3; Among them, L1 satisfies: 0.6 mm ≤ L1 ≤ 2.5 mm; L2 satisfies: 0.6 mm ≤ L2 ≤ 2.5 mm; L3 satisfies: 0.7 mm ≤ L3 ≤ 2.6 mm.

11. The rotor punching sheet (1) according to claim 1, characterized in that, A plurality of the second magnet grooves (310) are symmetrically arranged with respect to the D axis.

12. The rotor punching sheet (1) according to claim 1, characterized in that, A plurality of the second magnet grooves (310) are asymmetrically arranged with respect to the D axis.

13. The rotor punching sheet (1) according to claim 1, characterized in that, Each of the second magnet grooves (310) includes a third section of the groove body (311) and a fourth section of the groove body (312). The third section of the groove body (311) is closer to the D axis than the fourth section of the groove body (312). The included angle between the third section of the groove body (311) and the Q axis is A2, and the included angle between the third section of the groove body (311) and the fourth section of the groove body (312) is B2; Among them, the included angle A2 and the included angle B2 satisfy: 0.03 ≤ A2 / B2 ≤ 0.

11.

14. The rotor punching sheet (1) according to claim 13, characterized in that, Further included: A third magnetic member (530) and a fourth magnetic member (540). The third magnetic member (530) is arranged in the third section of the groove body (311), and the fourth magnetic member (540) is arranged in the fourth section of the groove body (312). The third magnetic member (530) and the fourth magnetic member (540) share the second magnet groove (310).

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

16. The rotor punching sheet (1) according to claim 15, characterized in that, The width of the second connecting rib (320) between the third section of the groove body (311) and the fourth section of the groove body (312) on one side of the D axis is L4, and the width of the second connecting rib (320) between the third section of the groove body (311) and the fourth section of the groove body (312) on the other side of the D axis is L5. The width of the second connecting rib (320) between two adjacent second magnet grooves (310) is L6; Among them, L4 = L5 = 0; And L6 satisfies: 0.6 mm ≤ L6 ≤ 0.9 mm.

17. The rotor punching sheet (1) according to claim 15, characterized in that, The width of the second connecting rib (320) between the third section of the groove body (311) and the fourth section of the groove body (312) on one side of the D axis is L4, and the width of the second connecting rib (320) between the third section of the groove body (311) and the fourth section of the groove body (312) on the other side of the D axis is L5. The width of the second connecting rib (320) between two adjacent second magnet grooves (310) is L6; Among them, L4 satisfies: 0.5 mm ≤ L4 ≤ 0.8 mm; L5 satisfies: 0.5 mm ≤ L5 ≤ 0.8 mm; L6 satisfies: 0.6 mm ≤ L6 ≤ 0.9 mm.

18. The rotor punching sheet (1) according to claim 13, characterized in that, The included angle A2 satisfies: -15° ≤ A2 ≤ 15°.

19. The rotor punching sheet (1) according to claim 13, characterized in that, The included angle B2 satisfies: 130° ≤ B2 ≤ 180°.

20. The rotor punching sheet (1) according to claim 1, characterized in that It further includes: At least one magnetic flux blocking groove (410), and the magnetic flux blocking groove (410) is arranged between the first magnet groove (210) and the outer peripheral edge of the rotor punching (1).

21. The rotor punching sheet (1) according to claim 20, characterized in that, There are multiple magnetic flux blocking grooves (410), and a third connecting rib (411) is formed between two adjacent magnetic flux blocking grooves (410) on the rotor punching (1). The width of the third connecting rib (411) is L7, and L7 satisfies: 0.5 mm ≤ L7 ≤ 1 mm.

22. The rotor punching sheet (1) according to claim 20, characterized in that, Along the radial direction of the rotor punching (1), the maximum distance between the magnetic flux blocking groove (410) and the outer peripheral edge of the rotor punching (1) is L8, and L8 satisfies: 0.6 ≤ L8 ≤ 1 mm.

23. The rotor punching sheet (1) according to claim 20, characterized in that, The cross-sectional shape of the magnetic flux blocking groove (410) is circular, rectangular or triangular.

24. A motor rotor (2), characterized in that, It includes: A rotor core, and the rotor core includes multiple rotor punchings (1) according to any one of claims 1 - 23, and the multiple rotor punchings (1) are stacked.

25. A motor, characterized in that, It includes a stator and a motor rotor (2) according to claim 24.

26. A vehicle, characterized in that, It includes a motor according to claim 25.

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