Rotor punching sheet, motor rotor, motor and vehicle

Abstract

The invention discloses a rotor punching sheet, a motor rotor, a motor and a vehicle, the rotor punching sheet comprises a plurality of first magnet grooves, the plurality of first magnet grooves are arranged along the circumferential direction of the rotor punching sheet and are arranged at two opposite sides of a D shaft, each first magnet groove comprises a first segment groove body and a second segment groove body, the first section of groove body is adjacent to the D axis relative to the second section of groove body, the included angle between the first section of groove body and the Q axis is A1, and the included angle between the first section of groove body and the second section of groove body is B1; the central axis of the D shaft, the central axis of the Q shaft and the central axis of the rotor punching sheet are perpendicular to each other. The included angle A1 and the included angle B1 meet the condition that A1 / B1 is larger than or equal to 0.03 and smaller than or equal to 0.13. According to the rotor punching sheet provided by the embodiment of the invention, the magnetic gathering effect is better, and the overall magnetic flux, the torque output and the motor efficiency of the motor are improved.

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 the rotating part of the permanent magnet synchronous motor, and can realize the conversion of electrical energy into mechanical energy through the interaction between the magnetic field and the magnetic field generated by the stator. In addition, the motor rotor usually includes a rotor punching, and the rotor punching is provided with a plurality of magnet slots for mounting permanent magnets.

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

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a rotor punching, which has a better magnetic field focusing effect, which is conducive 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 rotor punching sheet.

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

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

[0008] In order to achieve the above-mentioned purpose, a rotor punching sheet is proposed according to a first aspect of the present invention, comprising: a plurality of first magnet slots, which are arranged along the circumferential direction of the rotor punching sheet and are provided on opposite sides of the D axis, each of the first magnet slots comprises a first slot body and a second slot body, the first slot body is adjacent to the D axis relative to the second slot body, the angle between the first slot body and the Q axis is A1, and the angle between the first slot body and the second 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 angle A1 and the angle B1 satisfy: 0.03≤A1 / B1≤0.13.

[0009] In this way, the motor rotor according to the embodiment of the present invention has a better magnetic field focusing effect, 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 angle A1 and the angle B1 satisfy: 0.07≤A1 / B1≤0.1.

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

[0012] According to some embodiments of the present invention, the 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 about the D axis.

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

[0015] According to some embodiments of the present invention, the rotor punching also includes: a first magnetic part and a second magnetic part, the first magnetic part is arranged in the first section of the slot body, the second magnetic part is arranged in the second section of the slot body, and the first magnetic part and the second magnetic part 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 provided 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 and the second section of the slot on one side of the D axis is L1, the width of the first connecting rib between the first section of the slot and the second section of the slot on the other side of the D axis is L2, and the width of the first connecting rib between two adjacent first magnet slots is L3; wherein, L1=L2=0; and L3 satisfies: 0.7mm≤L3≤2.6mm.

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

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

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

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

[0022] According to some embodiments of the present invention, each of the second magnet slots includes a third slot section and a fourth slot section, the third slot section is adjacent to the D axis relative to the fourth slot section, the angle between the third slot section and the Q axis is A2, and the angle between the third slot section and the fourth slot section is B2; wherein the angle A2 and the angle B2 satisfy: 0.03≤A2 / B2≤0.11.

[0023] According to some embodiments of the present invention, the rotor punching also includes: a third magnetic part and a fourth magnetic part, the third magnetic part is arranged in the third section of the slot body, the fourth magnetic part is arranged in the fourth section of the slot body, and the third magnetic part and the fourth magnetic part share the second magnet slot.

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

[0025] According to some embodiments of the present invention, the width of the second connecting rib between the third slot section and the fourth slot section on one side of the D axis is L4, the width of the second connecting rib between the third slot section and the fourth slot section 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: 0.6mm≤L6≤0.9mm.

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

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

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

[0029] According to some embodiments of the present invention, the rotor punching further includes: at least one magnetic blocking groove, wherein the magnetic blocking groove is arranged between the first magnet groove and the outer periphery of the rotor punching.

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

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

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

[0033] According to a second aspect of the present invention, an electric motor rotor is provided. The electric motor rotor comprises: a rotor core. The rotor core comprises a plurality of rotor punchings according to the first aspect of the present invention. The plurality of rotor punchings are stacked.

[0034] The motor rotor described in the embodiment of the second aspect of the present invention can improve the overall magnetic flux of the motor by utilizing the rotor punching sheets described in the embodiment of the first aspect of the present invention, and the torque output and efficiency of the motor are both high.

[0035] According to a third aspect of the present invention, an electric motor is provided. The electric motor comprises the electric motor rotor according to the second aspect of the present invention.

[0036] The motor described in the embodiment according to the third aspect of the present invention can improve the overall magnetic flux of the motor by utilizing the motor rotor described in the embodiment according to the second aspect of the present invention, and the torque output and efficiency of the motor are both high.

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

[0038] The vehicle according to the fourth aspect of the present invention, by utilizing the motor according to the third aspect of the present invention, has the advantages of large overall magnetic flux of the motor, high torque output of the motor and high motor efficiency.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of a motor rotor according to a first embodiment of the present invention; Figure 2 is a schematic structural diagram of a motor rotor according to a second embodiment of the present invention; Figure 3 is a schematic structural diagram of a motor rotor according to a third embodiment of the present invention; Figure 4 is a schematic structural diagram of a motor rotor according to a fourth embodiment of the present invention; Figure 5 is a schematic diagram of a partial structure of a first type of magnetic pole of a motor rotor according to an embodiment of the present invention; Figure 6 is a schematic diagram of a partial structure of a second type of magnetic pole of a motor rotor according to an embodiment of the present invention; Figure 7 is a schematic diagram of a partial structure of a third magnetic pole of a motor rotor according to an embodiment of the present invention; Figure 8 is a schematic diagram of a partial structure of a fourth magnetic pole of a motor rotor according to an embodiment of the present invention; Fig. 9 is a schematic diagram of a partial structure of a fifth type of magnetic pole of a motor rotor according to an embodiment of the present invention; Fig.10 is a schematic diagram of a partial structure of a sixth type of magnetic pole of a motor rotor according to an embodiment of the present invention; Fig.11 is a back electromotive force comparison curve diagram according to an embodiment of the present invention and an existing solution; Fig.12 is a magnetic flux comparison bar chart according to an embodiment of the present invention and an existing solution; Fig.13 is a curve diagram comparing external characteristics according to an embodiment of the present invention and an existing solution; Fig.14 is a bar chart comparing the proportion of high-efficiency areas according to the embodiment of the present invention and the existing solution; Fig.15 is another high-efficiency area ratio comparison bar chart according to the embodiment of the present invention and the existing solution; Reference numerals: 1. Rotor punching; 2. Motor rotor; 100, magnetic pole; 210, first magnet slot; 211, first slot section; 212, second slot section; 220, first connecting rib; 310, second magnet slot; 311, third slot section; 312, fourth slot section; 320, second connecting rib; 410, magnetic blocking groove; 411, third connecting rib; 420, weight reduction hole; 510, a first magnetic component; 520, a second magnetic component; 530, a third magnetic component; 540, a fourth magnetic component. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0044] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0045] The rotor punching sheet 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0046] like Figure 1-Figure 10 As shown, the rotor sheet 1 according to the embodiment of the present invention includes a plurality of first magnet slots 210 .

[0047] A plurality of first magnet slots 210 are arranged along the circumferential direction of the rotor punching 1 and are disposed on opposite sides of the D axis. Each first magnet slot 210 includes a first slot body 211 and a second slot body 212. The first slot body 211 is adjacent to the D axis relative to the second slot body 212. The angle between the first slot body 211 and the Q axis is A1, and the angle between the first slot body 211 and the second slot body 212 is B1.

[0048] 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.

[0049] The D axis intersects with the central axis of the rotor sheet 1 , that is, the D axis may coincide with the diameter of the rotor sheet 1 , and the plurality of first magnet slots 210 may be symmetrically arranged about the D axis.

[0050] The angle between the first section of the slot body 211 and the Q axis is A1, which means that the angle between the central axis of the first section of the slot body 211 in the width direction and the Q axis is A1. In addition, it should be noted that the angle A1 refers to the acute angle formed between the central axis of the first section of the slot body 211 in the width direction and the Q axis. And the angle between the first section of the slot body 211 and the second section of the slot body 212 is B1, which means that the angle between the central axis of the first section of the slot body 211 in the width direction and the central axis of the second section of the slot body 212 in the width direction is B1.

[0051] According to the rotor punching sheet 1 of the embodiment of the present invention, by setting 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 will not be less than 0.03, which can avoid A1 being too small or B1 being too large, which is beneficial to improving the magnetic field gathering effect between the first magnet slot 210 and the other layers of magnet slots, thereby improving the torque output of the motor, and A1 / B1 will not be greater than 0.13, which can avoid A1 being too large or B1 being too small, which is beneficial to reducing the magnetic field density between the first magnet slot 210 and the other layers of magnet slots, thereby reducing the iron loss of the motor and improving the motor efficiency.

[0052] Specifically, as shown in the test data in Table 1 below, when 0.03≤A1 / B1≤0.13, the no-load air gap flux density can be lower, the iron loss can be smaller, and the peak torque can also be larger. 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 flux density, smaller iron loss and larger peak torque, thereby greatly improving the motor efficiency.

[0053] Table 1

[0054] In this way, the motor rotor 2 according to the embodiment of the present invention has a better magnetic field focusing effect, which is beneficial to improving the overall magnetic flux, torque output and motor efficiency of the motor.

[0055] In some specific embodiments of the present invention, Figure 1 and Figure 2As shown, the angle A1 and the angle B1 satisfy: 0.07≤A1 / B1≤0.1.

[0056] For example, A1 / B1 may be 0.07, 0.08, 0.09 or 0.1.

[0057] With this arrangement, A1 / B1 will not be less than 0.07, which can further avoid A1 being too small or B1 being too large, more effectively improve the magnetic field gathering effect between the first magnet slot 210 and other layers of magnet slots, and thus more significantly improve the torque output of the motor. In addition, A1 / B1 will not be greater than 0.1, which further avoids A1 being too large or B1 being too small, and is more conducive to reducing the magnetic flux density between the first magnet slot 210 and other layers of magnet slots, and thus can effectively reduce the iron loss of the motor to improve the motor efficiency.

[0058] In some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the angle A1 satisfies: -15°≤A1≤15°.

[0059] For example, the angle A1 may be -15°, -13°, -11°, -9°, -7°, -5°, -3°, -1°, 0°, 1°, 3°, 5°, 7°, 9°, 11°, 13° or 15°. Furthermore, it should be noted that a negative angle A1 means that the end of the first slot body 211 away from the D axis is inclined toward the central axis of the rotor sheet 1, and at this time, the angle A1 between the central axis of the width direction of the first slot body 211 and the Q axis is a negative number; and a positive angle A1 means that the end of the first slot body 211 away from the D axis is inclined toward the central axis of the rotor sheet 1, and at this time, the angle A1 between the central axis of the width direction of the first slot body 211 and the Q axis is a positive number.

[0060] By setting -15°≤A1≤15°, it is possible to avoid a decrease in the magnetic field concentration effect of the motor due to an excessively large A1 value, which is beneficial to increasing the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0061] In some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the angle B1 satisfies: 110°≤B1≤180°. For example, the angle B1 can be 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175° or 180°. When B2 is 180°, the first section of the slot 211 and the second section of the slot 212 are parallel.

[0062] In this way, it can not only avoid the B1 value being too small, which will lead to excessively high magnetic density between the first magnet slot 210 and other layers of magnet slots, and is beneficial to reducing the iron loss of the motor, thereby improving the motor efficiency, but also avoid the B1 value being too large, which will lead to a decrease in the magnetic concentration effect of the motor, and is beneficial to improving the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0063] In some specific embodiments of the present invention, Figure 1 As shown, the plurality of first magnet slots 210 are symmetrically arranged about the axis D. In this way, the arrangement structure of the plurality of first magnet slots 210 can be more uniform, so as to facilitate the magnetic flux of the magnetic circuit in the motor rotor 2, facilitate the magnetic flux concentration design of the magnetic circuit, and further reduce magnetic leakage, which is beneficial to improve the output torque of the motor.

[0064] In some other specific embodiments of the present invention, the plurality of first magnet slots 210 are asymmetrically arranged about the D axis.

[0065] This arrangement can more effectively artificially create partial magnetic field distribution. Different first magnet slots 210 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, so that the output of the motor torque can be more stable. The arrangement of the first magnet slots 210 is more diversified, so that the motor can better adapt to different working conditions.

[0066] In some specific embodiments of the present invention, Figure 1 , Figure 8 and Fig. 9 As shown, the rotor punching 1 further includes a first magnetic component 510 and a second magnetic component 520 .

[0067] The first magnetic member 510 is disposed in the first section of the slot 211 , and the second magnetic member 520 is disposed in the second section of the slot 212 . The first magnetic member 510 and the second magnetic member 520 share the first magnetic slot 210 .

[0068] That is to say, the first section of the slot 211 and the second section of the slot 212 are connected, and the first magnetic component 510 and the second magnetic component 520 are respectively arranged in the first section of the slot 211 and the second section of the slot 212, and the first magnetic component 510 and the second magnetic component 520 share the first magnet slot 210, which can simplify the structure of the first magnet slot 210, and then simplify the structure of the rotor punching 1, which is convenient for processing.

[0069] Among them, first connection ribs 220 may be provided between the plurality of first magnet slots 210 , that is, two adjacent first magnet slots 210 are separated by the first connection ribs 220 .

[0070] In other specific embodiments of the present invention, Figure 2-Figure 4As shown, the rotor punching 1 is configured with a first connecting rib 220 , and the first connecting rib 220 is arranged between the first slot body 211 and the second slot body 212 .

[0071] Furthermore, the first connecting rib 220 may be disposed between two adjacent first magnet slots 210 .

[0072] That is, the first slot body 211 and the second slot body 212 may be separated by the first connecting rib 220 , and two adjacent first magnet slots 210 may also be separated by the first connecting rib 220 .

[0073] In this way, the first slot body 211 and the second 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. Therefore, by providing the first connecting rib 220, the structural arrangement of the first magnetic slot 210 can be more diversified, so that the magnetic circuit of the motor rotor 2 can be optimized, and then the leakage magnetic flux can be reduced, which is conducive to improving the torque output of the motor.

[0074] In some specific embodiments of the present invention, Figure 4 and Figure 8 As 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.

[0075] Among them, L1=L2=0; and L3 satisfies: 0.7mm≤L3≤2.6mm.

[0076] The width of the first connecting rib 220 between the first slot body 211 and the second slot body 212 is 0, that is, the first connecting rib 220 is not arranged between the first slot body 211 and the second slot body 212 , and the first connecting rib 220 is only arranged between two adjacent first magnet slots 210 .

[0077] 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.

[0078] Such arrangement, on the one hand, can prevent the width value of L3 from being too small, thereby preventing the processing technology of the first connecting rib 220 from being too difficult, and can make the structural strength of the first connecting rib 220 larger, thereby preventing the first connecting rib 220 from being deformed or broken, which is beneficial to improving the overall structural strength of the rotor punching 1. On the other hand, it can prevent the width value of L3 from being too large, thereby preventing the leakage magnetic field of the motor from being too large, which is beneficial to improving the output torque of the motor and the motor efficiency.

[0079] In some specific embodiments of the present invention, Figure 4 As 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.

[0080] Among them, L1 satisfies: 0.6mm≤L1≤2.5mm; L2 satisfies: 0.6mm≤L2≤2.5mm; L3 satisfies: 0.7mm≤L3≤2.6mm.

[0081] For example, the width L1 of the first connecting rib 220 between the first section of the groove 211 and the second section of the groove 212 on one side of the D axis can 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 section of the groove 211 and the second section of the groove 212 on the other side of the D axis can be 0.6 mm m, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 2.0mm, 2.2mm, 2.4mm or 2.5mm; the width L3 of the first connecting rib 220 between two adjacent first magnet slots 210 can be 0.7mm, 0.9mm, 1.0mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 2.0mm, 2.2mm, 2.4mm or 2.6mm. Moreover, any two of L1, L2 and L3 can be the same or different.

[0082] Such arrangement, on the one hand, can prevent the width value of L1, L2 or L3 from being too small, thereby preventing the processing technology of the first connecting rib 220 from being too difficult, and can make the structural strength of the first connecting rib 220 larger, thereby preventing the first connecting rib 220 from being deformed or broken, which is beneficial to improving the overall structural strength of the rotor punching 1. On the other hand, it can prevent the width value of L1, L2 or L3 from being too large, thereby preventing the leakage magnetic field of the motor from being too large, which is beneficial to improving the output torque of the motor and the motor efficiency.

[0083] In some specific embodiments of the present invention, Figure 1-Figure 4 As shown, the rotor sheet 1 further includes a plurality of second magnet slots 310 .

[0084] The plurality of second magnet slots 310 are arranged outside the first magnet slots 210 along the radial direction of the rotor punching 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 constitute a magnetic pole 100 .

[0085] Among them, multiple first magnet slots 210 can form a layer of magnet slots, multiple 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 and setting angles of the multiple magnet slots of each magnetic pole 100, the geometric shape, arrangement and magnetic circuit structure of the magnetic parts can be optimized, thereby improving the magnetic concentration effect of the motor rotor 2, making the magnetic field superimposed and enhanced in a specific area, thereby improving the magnetic flux and magnetic field utilization of the motor, and improving the torque and power of the motor.

[0086] In some specific embodiments of the present invention, Figure 1-Figure 4 As shown, the plurality of second magnet slots 310 are symmetrically arranged about the axis D. 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 flux concentration design of the magnetic circuit, and further reduce magnetic leakage, which is beneficial to improve the output torque of the motor.

[0087] In some other specific embodiments of the present invention, the plurality of second magnet slots 310 are asymmetrically arranged about the D axis.

[0088] This arrangement can more effectively create partial magnetic field distribution. Different second magnet slots 310 can be distributed non-uniformly, which can reduce the harmonic content of the air gap magnetic density waveform, thereby avoiding torque fluctuations and electromagnetic noise, so that the output of the motor torque can be more stable. The second magnet slots 310 can be arranged in a more diversified manner, so that the motor can better adapt to different working conditions.

[0089] In some specific embodiments of the present invention, Figure 2-Figure 4 As shown, each second magnet slot 310 includes a third slot section 311 and a fourth slot section 312 .

[0090] The third slot body 311 is adjacent to the D axis relative to the fourth slot body 312 , the angle between the third slot body 311 and the Q axis is A2 , and the angle between the third slot body 311 and the fourth slot body 312 is B2 .

[0091] Among them, the angle A2 and the angle B2 satisfy: 0.03≤A2 / B2≤0.11.

[0092] 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, which is beneficial to improving the magnetic field gathering effect between the second magnet slot 310 and the other layers of magnet slots, thereby improving the torque output of the motor, and A2 / B2 will not be greater than 0.11, which can avoid A2 being too large or B2 being too small, which is beneficial to reducing the magnetic field density between the second magnet slot 310 and the other layers of magnet slots, thereby reducing the iron loss of the motor and improving the motor efficiency.

[0093] In some specific embodiments of the present invention, Figure 1 , Figure 5 and Fig. 9 As shown, the rotor sheet 1 further includes a third magnetic component 530 and a fourth magnetic component 540 .

[0094] The third magnetic member 530 is disposed in the third slot 311 , and the fourth magnetic member 540 is disposed in the fourth slot 312 . The third magnetic member 530 and the fourth magnetic member 540 share the second magnetic slot 310 .

[0095] That is to say, the third section slot body 311 and the fourth section slot body 312 are connected, and the third magnetic component 530 and the fourth magnetic component 540 are respectively arranged in the third section slot body 311 and the fourth section slot body 312, and the third magnetic component 530 and the fourth magnetic component 540 share the second magnet slot 310, which can simplify the structure of the second magnet slot 310, and then simplify the structure of the rotor punching sheet 1, which is convenient for processing.

[0096] Among them, second connection ribs 320 may be provided between the plurality of second magnet slots 310 , that is, two adjacent second magnet slots 310 are separated by the first connection ribs 220 .

[0097] In other specific embodiments of the present invention, Figure 2-Figure 4 As shown, the rotor sheet 1 is configured with a second connecting rib 320 , and the second connecting rib 320 is arranged between the third slot body 311 and the fourth slot body 312 .

[0098] Furthermore, a second connecting rib 320 may be disposed between two adjacent second magnet slots 310 .

[0099] That is, the third slot body 311 and the fourth slot body 312 may be separated by the second connecting rib 320 , and two adjacent second magnet slots 310 may also be separated by the second connecting rib 320 .

[0100] In this way, the third slot body 311 and the fourth slot body 312 can be two independent slot bodies, and the third magnetic member 530 and the fourth magnetic member 540 can be respectively arranged in the two independent slot bodies. Therefore, by setting the second connecting rib 320, the structural arrangement of the second magnetic slot 310 can be more diversified, so that the magnetic circuit of the motor rotor 2 can be optimized, and then the leakage magnetic flux can be reduced, which is conducive to improving the torque output of the motor.

[0101] In some specific embodiments of the present invention, Figure 4 and Figure 5 As 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.

[0102] Among them, L4=L5=0; and L6 satisfies: 0.6mm≤L6≤0.9mm.

[0103] The width of the second connecting rib 320 between the third slot body 311 and the fourth slot body 312 is 0, that is, the second connecting rib 320 is not arranged between the third slot body 311 and the fourth slot body 312, and the second connecting rib 320 is only arranged between two adjacent second magnet slots 310.

[0104] For example, the width L6 of the second connection rib 320 between two adjacent second magnet slots 310 may be 0.6 mm, 0.7 mm, 0.8 mm or 0.9 mm.

[0105] Such arrangement, on the one hand, can prevent the width value of L6 from being too small, thereby preventing the processing technology of the second connecting rib 320 from being too difficult, and can make the structural strength of the second connecting rib 320 greater, thereby preventing the second connecting rib 320 from being deformed or broken, which is beneficial to improving the overall structural strength of the rotor punching 1. On the other hand, it can prevent the width value of L6 from being too large, thereby preventing the leakage magnetic field of the motor from being too large, which is beneficial to improving the output torque of the motor and the motor efficiency.

[0106] In other specific embodiments of the present invention, Figure 4 As 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.

[0107] Among them, L4 satisfies: 0.5mm≤L4≤0.8mm; L5 satisfies: 0.5mm≤L5≤0.8mm; L6 satisfies: 0.6mm≤L6≤0.9mm.

[0108] For example, the width L4 of the second connecting rib 320 between the third slot 311 and the fourth slot 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 311 and the fourth slot 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. Moreover, any two of L4, L5 and L6 can be the same or different.

[0109] Such arrangement, on the one hand, can prevent the width value of L4, L5 or L6 from being too small, thereby preventing the processing technology of the second connecting rib 320 from being too difficult, and can make the structural strength of the second connecting rib 320 larger, thereby preventing the second connecting rib 320 from being deformed or broken, which is beneficial to improving the overall structural strength of the motor rotor 2. On the other hand, it can prevent the width value of L4, L5 or L6 from being too large, thereby preventing the leakage magnetic field of the motor from being too large, which is beneficial to improving the output torque of the motor and the motor efficiency.

[0110] In some specific embodiments of the present invention, Figure 2 As shown, the angle A2 satisfies: -15°≤A2≤15°.

[0111] For example, the angle A2 may be -15°, -13°, -11°, -9°, -7°, -5°, -3°, -1°, 0°, 1°, 3°, 5°, 7°, 9°, 11°, 13° or 15°. Furthermore, it should be noted that a negative angle A2 means that the end of the third slot body 311 away from the D axis is inclined toward the central axis of the rotor sheet 1, and at this time, the angle A2 between the central axis of the width direction of the third slot body 311 and the Q axis is a negative number; and a positive angle A2 means that the end of the third slot body 311 away from the D axis is inclined toward the central axis of the rotor sheet 1, and at this time, the angle A2 between the central axis of the width direction of the third slot body 311 and the Q axis is a positive number.

[0112] By setting -15°≤A2≤15°, it is possible to avoid a decrease in the magnetic field concentration effect of the motor due to an excessively large A2 value, which is beneficial to increasing the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0113] In some specific embodiments of the present invention, Figure 2As shown, the angle B2 satisfies: 130°≤B2≤180°.

[0114] For example, the angle B2 may be 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175° or 180°. When B2 is 180°, the third slot body 311 and the fourth slot body 312 are parallel.

[0115] In this way, not only can it be avoided that the B2 value is too small, which leads to excessively high magnetic density between the second magnet slot 310 and other layers of magnet slots, and is beneficial to reducing the iron loss of the motor, thereby improving the motor efficiency, but it can also be avoided that the B2 value is too large, which leads to a decrease in the magnetic concentration effect of the rotor motor, and is beneficial to improving the overall magnetic flux of the motor, thereby enabling the motor to output high torque.

[0116] In some specific embodiments of the present invention, Figure 2-Figure 4 As shown, the rotor sheet 1 further includes at least one magnetic blocking groove 410 , and the magnetic blocking groove 410 is provided between the first magnet groove 210 and the outer periphery of the rotor sheet 1 .

[0117] By constructing the magnetic blocking groove 410, the magnetic circuit can be blocked by the magnetic blocking groove 410 at the corresponding position of the rotor punching sheet 1, and then the setting of the magnetic circuit can be corrected by using the magnetic blocking groove 410, so as to change the structure of the magnetic circuit, make the magnetic field superimposed and enhanced in a specific area, and improve the magnetic concentration effect of the magnetic circuit, and further reduce the leakage magnetic flux of the motor, which is beneficial to improve the magnetic flux of the motor, improve the utilization rate of the magnetic field, and can improve the torque and power of the motor, as well as improve the power density and torque density of the motor.

[0118] In some specific embodiments of the present invention, Figure 2-Figure 4 As shown, there are multiple magnetic blocking slots 410, and the rotor punching 1 is configured with a third connecting rib 411 between two adjacent magnetic blocking slots 410, and the width of the third connecting rib 411 is L7, and L7 satisfies: 0.5mm≤L7≤1mm.

[0119] For example, the width L7 of the third connecting rib 411 may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0120] Such arrangement, on the one hand, can prevent the width L7 of the third connecting rib 411 from being too small, thereby preventing the processing technology of the third connecting rib 411 from being too difficult, and can make the structural strength of the third connecting rib 411 larger, thereby preventing the third connecting rib 411 from being deformed or broken, which is beneficial to improving the overall structural strength of the rotor punching 1. On the other hand, it can prevent the width L7 of the third connecting rib 411 from being too large, thereby preventing the leakage magnetic field of the motor from being too large, which is beneficial to improving the output torque of the motor and the motor efficiency.

[0121] In some specific embodiments of the present invention, Figure 4 As shown, along the radial direction of the rotor punching 1, the maximum distance between the magnetic blocking groove 410 and the outer peripheral edge of the rotor punching 1 is L8, and L8 satisfies: 0.6≤L8≤1mm.

[0122] For example, the maximum distance L8 between the magnetic blocking groove 410 and the outer periphery of the rotor punching sheet 1 may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0123] Such arrangement, on the one hand, can avoid the distance between the anti-magnetic groove 410 and the outer periphery of the rotor sheet 1 being too small, thereby avoiding the structural processing difficulty between the anti-magnetic groove 410 and the outer periphery of the rotor sheet 1 being too great, and can make the structural strength of the structure between the anti-magnetic groove 410 and the outer periphery of the rotor sheet 1 greater, avoiding deformation or breakage of this part of the structure, which is beneficial to improving the overall structural strength of the rotor sheet 1, and on the other hand, can avoid the distance between the anti-magnetic groove 410 and the outer periphery of the rotor sheet 1 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.

[0124] In some specific embodiments of the present invention, Figure 2-Figure 10 As shown, the cross-sectional shape of the magnetic blocking slot 410 is circular, rectangular or triangular.

[0125] 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 may be one of circular, rectangular or triangular; and when there are multiple magnetic blocking grooves 410, the cross-sectional shape of the multiple magnetic blocking grooves 410 may be one or a combination of circular, rectangular or triangular.

[0126] In addition, the rotor core may be provided with a plurality of lightening holes 420 , which are adjacent to the center of the rotor core and arranged at intervals along the circumferential direction of the rotor core.

[0127] The advantages of the improved present invention are illustrated below with reference to the accompanying drawings.

[0128] For example, the rotor punching 1 has six magnetic poles 100, A1 is selected as 6.7° and B1 is selected as 140°, A2 is selected as 10° and B2 is selected as 155°, L1=L2=0.6mm, L3=0.7mm, L4=L5=0.5mm, L6=0.6mm, L7=1mm, and the other parameters and sizes of the motor are the same. After calculation, the calculation results of the improved motor are compared with the existing scheme. Figure 11-Figure 15 As shown, it can be seen that, when other conditions are the same, the magnetic field concentration design of the present invention can increase the overall magnetic flux of the motor, increase the torque output of the motor, and improve the efficiency of the motor.

[0129] The following describes a motor rotor 2 according to an embodiment of the present invention with reference to the accompanying drawings. The motor rotor 2 includes a rotor core. The rotor core includes a plurality of rotor sheets 1 according to the above-mentioned embodiment of the present invention. The plurality of rotor sheets 1 are stacked.

[0130] According to the motor rotor 2 of the embodiment of the present invention, by utilizing the rotor punching sheet 1 according to the above embodiment of the present invention, the overall magnetic flux of the motor can be improved, and the torque output and efficiency of the motor are both high.

[0131] The following describes a motor according to an embodiment of the present invention with reference to the accompanying drawings. The motor includes a motor rotor 2 according to the above-mentioned embodiment of the present invention.

[0132] The motor according to the embodiment of the present invention can improve the overall magnetic flux of the motor by utilizing the motor rotor 2 according to the above embodiment of the present invention, and the torque output and motor efficiency of the motor are both high.

[0133] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes a motor according to the above-described embodiment of the present invention.

[0134] The vehicle according to the embodiment of the present invention has the advantages of large overall magnetic flux of the motor, high torque output of the motor and high motor efficiency by utilizing the motor according to the above-mentioned embodiment of the present invention.

[0135] The rotor punching 1, the motor rotor 2, other structures and operations of the motor and the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0136] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0137] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor punching (1), characterized in that: include: a plurality of first magnet slots (210), the plurality of first magnet slots (210) being arranged along the circumferential direction of the rotor punching sheet (1) and being provided on opposite sides of the D axis, each of the first magnet slots (210) comprising a first slot body (211) and a second slot body (212), the first slot body (211) being adjacent to the D axis relative to the second slot body (212), the angle between the first slot body (211) and the Q axis being A1, and the angle between the first slot body (211) and the second slot body (212) being B1; 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.

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

1.

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

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

5. The rotor punching (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 (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 (1) according to claim 1, characterized in that: Also includes: A first magnetic component (510) and a second magnetic component (520), wherein the first magnetic component (510) is arranged in the first section of the slot body (211), and the second magnetic component (520) is arranged in 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 (1) according to claim 8, characterized in that: The width of the first connecting rib (220) between the first slot section (211) and the second slot section (212) on one side of the D axis is L1, the width of the first connecting rib (220) between the first slot section (211) and the second slot section (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; Among them, L1=L2=0; And L3 satisfies: 0.7mm≤L3≤2.6mm.

10. The rotor punching (1) according to claim 8, characterized in that: The width of the first connecting rib (220) between the first slot section (211) and the second slot section (212) on one side of the D axis is L1, the width of the first connecting rib (220) between the first slot section (211) and the second slot section (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; Among them, L1 satisfies: 0.6mm≤L1≤2.5mm; L2 meets the following requirements: 0.6mm≤L2≤2.5mm; L3 satisfies: 0.7mm≤L3≤2.6mm.

11. The rotor punching (1) according to claim 1, characterized in that Also includes: A plurality of second magnet slots (310) are provided, wherein the plurality of second magnet slots (310) are arranged outside the first magnet slots (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).

12. The rotor sheet (1) according to claim 11, characterized in that A plurality of the second magnet slots (310) are symmetrically arranged about the D axis.

13. The rotor sheet (1) according to claim 11, characterized in that The plurality of second magnet slots (310) are asymmetrically arranged about the D axis.

14. The rotor sheet (1) according to claim 11, characterized in that Each of the second magnet slots (310) comprises a third slot section (311) and a fourth slot section (312), the third slot section (311) being adjacent to the D axis relative to the fourth slot section (312), the angle between the third slot section (311) and the Q axis being A2, and the angle between the third slot section (311) and the fourth slot section (312) being B2; Wherein, the angle A2 and the angle B2 satisfy: 0.03≤A2 / B2≤0.

11.

15. The rotor lamination (1) according to claim 14, characterized in that Also includes: A third magnetic component (530) and a fourth magnetic component (540), wherein the third magnetic component (530) is arranged in the third section slot body (311), the fourth magnetic component (540) is arranged in the fourth section slot body (312), and the third magnetic component (530) and the fourth magnetic component (540) share the second magnetic slot (310).

16. The rotor sheet (1) according to claim 14, 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).

17. The rotor lamination (1) according to claim 16, characterized in that 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; Among them, L4=L5=0; And L6 satisfies: 0.6mm≤L6≤0.9mm.

18. The rotor sheet (1) according to claim 16, characterized in that 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; Among them, L4 satisfies: 0.5mm≤L4≤0.8mm; L5 meets the following requirements: 0.5mm≤L5≤0.8mm; L6 satisfies: 0.6mm≤L6≤0.9mm.

19. The rotor sheet (1) according to claim 14, characterized in that The angle A2 satisfies: -15°≤A2≤15°.

20. The rotor sheet (1) according to claim 14, characterized in that The angle B2 satisfies: 130°≤B2≤180°.

21. The rotor sheet (1) according to claim 1, characterized in that Also includes: At least one magnetic blocking groove (410), wherein the magnetic blocking groove (410) is arranged between the first magnet groove (210) and the outer periphery of the rotor punching sheet (1).

22. The rotor lamination (1) according to claim 21, characterized in that There are a plurality of magnetic blocking slots (410), and the rotor punching sheet (1) is configured with a third connecting rib (411) between two adjacent magnetic blocking slots (410), the width of the third connecting rib (411) being L7, and L7 satisfying: 0.5 mm ≤ L7 ≤ 1 mm.

23. The rotor sheet (1) according to claim 21, characterized in that Along the radial direction of the rotor punching sheet (1), the maximum spacing 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≤1mm.

24. The rotor sheet (1) according to claim 21, characterized in that The cross-sectional shape of the magnetic blocking groove (410) is circular, rectangular or triangular.

25. 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 24, wherein the plurality of rotor punching sheets (1) are stacked.

26. A motor, characterized in that: The invention comprises a stator and an electric motor rotor (2) according to claim 25.

27. A vehicle, characterized in that: Comprising an electric machine according to claim 26.

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