Rotor punching sheet, rotor, motor, compressor and vehicle

Abstract

The invention provides a rotor punching sheet, a rotor, a motor, a compressor and a vehicle. The rotor punching sheet comprises a punching sheet body, the portion, opposite to a magnet groove, of the peripheral wall of the punching sheet body comprises two arc segment sets, and each arc segment set comprises a first arc segment, a second arc segment and a third arc segment which are arranged in the circumferential direction of the rotor punching sheet; the part, opposite to the inter-electrode part, of the peripheral wall of the punching sheet body is a fourth arc section; the radius corresponding to the fourth arc section is smaller than that corresponding to the first arc section; the circle center corresponding to any one of the second arc segment and the third arc segment is located on the magnetic pole center line of the rotor punching sheet. The distance from the circle center corresponding to the second arc section to the center of the shaft hole is recorded as b, the distance from the circle center corresponding to the third arc section to the center of the shaft hole is recorded as c, the radius corresponding to the first arc section is recorded as R1, the radius corresponding to the fourth arc section is recorded as R2, and (b + c) * (R1-R2) < a.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a rotor punching, a rotor, a motor, a compressor and a vehicle. Background Art

[0002] The cooling and heating functions of the cockpit of new energy electric vehicles are regulated by an electric compressor, which is powered by a built-in permanent magnet motor. In related technologies, the trend towards higher speeds of permanent magnet motors has led to significant vibration and noise, which has reduced product performance. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present application proposes a rotor punching.

[0005] A second aspect of the present application provides a rotor.

[0006] A third aspect of the present application provides an electric motor.

[0007] A fourth aspect of the present application provides a compressor.

[0008] A fifth aspect of the present application provides a vehicle.

[0009] In view of this, the first aspect of the present application proposes a rotor punching sheet, comprising: a punching sheet body, the punching sheet body is provided with an axial hole and a plurality of magnet slots, and the plurality of magnet slots are arranged at intervals around the axial hole; the portion of the outer peripheral wall of the punching sheet body that is arranged opposite to the magnet slots comprises two arc segment groups, and the two arc segment groups are symmetrically arranged with the magnetic pole center line of the rotor punching sheet as the symmetry axis, and the arc segment group comprises a first arc segment, a second arc segment and a third arc segment arranged along the circumference of the rotor punching sheet, the first arc segment is arranged adjacent to the magnetic pole center line of the rotor punching sheet, and the second arc segment is located between the first arc segment and the third arc segment; along the circumference of the rotor punching sheet, the portion of the punching sheet body located between the ends of two adjacent magnet slots is recorded as an interpolar portion, and the punching sheet body The portion of the outer peripheral wall that is arranged opposite to the interpolar portion is the fourth arc segment; the center of the circle corresponding to either the first arc segment or the fourth arc segment coincides with the center of the shaft hole, and the radius corresponding to the fourth arc segment is smaller than the radius corresponding to the first arc segment; the center of the circle corresponding to either the second arc segment or the third arc segment is located on the magnetic pole center line of the rotor punching; the minimum distance from the side of the magnet slot away from the shaft hole to the center of the shaft hole is denoted as a, the distance from the center of the circle corresponding to the second arc segment to the center of the shaft hole is denoted as b, the distance from the center of the circle corresponding to the third arc segment to the center of the shaft hole is denoted as c, the radius corresponding to the first arc segment is denoted as R1, and the radius corresponding to the fourth arc segment is denoted as R2, wherein, (b+c)×(R1-R2)<a.

[0010] The present application provides a rotor punching sheet comprising a punching sheet body, wherein the punching sheet body is provided with a plurality of magnet slots. The magnet slots are located between an axial hole and an outer peripheral wall of the punching sheet body, and the plurality of magnet slots are spaced apart and arranged around the axial hole.

[0011] The shape of the outer peripheral wall of the sheet body is defined so that the portion of the outer peripheral wall of the sheet body opposite the magnet slot includes two arc segment groups. Along the circumference of the rotor sheet, the portion of the sheet body located between the ends of two adjacent magnet slots is recorded as the interpolar portion, and the portion of the outer peripheral wall of the sheet body opposite the interpolar portion is the fourth arc segment. It can be understood that the outer peripheral wall of the sheet body is divided to form multiple regions, each region is opposite a magnet slot, and each region is provided with two arc segment groups. In each region, the two arc segment groups are symmetrically arranged with the centerline of the magnetic pole of the rotor sheet as the axis of symmetry. A fourth arc segment is sandwiched between two adjacent regions.

[0012] The arc segment group includes a first arc segment, a second arc segment, and a third arc segment arranged along the circumference of the rotor punching. The first arc segment is located adjacent to the magnetic pole centerline of the rotor punching, and the second arc segment is located between the first and third arc segments. For example, the first arc segment extends from the magnetic pole centerline along the circumference of the rotor punching, the second arc segment is located on the side of the first arc segment facing away from the magnetic pole centerline, and the third arc segment is located on the side of the second arc segment facing away from the first arc segment.

[0013] The matching structure of the first arc segment, the second arc segment, the third arc segment, and the fourth arc segment is further defined. The center of the circle corresponding to the second arc segment is located on the magnetic pole centerline of the rotor punching, that is, the center of the circle corresponding to the first arc segment coincides with the center of the shaft hole, and the center of the circle corresponding to the fourth arc segment coincides with the center of the shaft hole. In addition, the radius corresponding to the fourth arc segment is smaller than the radius corresponding to the first arc segment. The center of the circle corresponding to either the second arc segment or the third arc segment is located on the magnetic pole centerline of the rotor punching, that is, the center of the circle corresponding to the second arc segment is located on the magnetic pole centerline of the rotor punching, and the center of the circle corresponding to the third arc segment is located on the magnetic pole centerline of the rotor punching.

[0014] The minimum distance from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole is denoted as a. The distance from the center of the circle corresponding to the second arc segment to the center of the shaft hole is denoted as b. The distance from the center of the circle corresponding to the third arc segment to the center of the shaft hole is denoted as c. The radius corresponding to the first arc segment is denoted as R1. The radius corresponding to the fourth arc segment is denoted as R2. The relationship between a, b, c, R1, and R2 is defined to satisfy: (b + c) × (R1 - R2) < a.

[0015] That is to say, by defining the relationships among a, b, c, R1, and R2 to satisfy the above relationship definitions, the distribution area of the air gap between the stator and rotor of the motor can be changed, making the sine wave of the formed magnetic field higher, and the output torque of the motor during load operation smoother. In this way, it is beneficial to reduce the torque ripple of the motor, weaken the harmonics of the motor, and further reduce the vibration and noise of the motor, which is conducive to improving the product performance and market competitiveness.

[0016] On the other hand, the torque ripple of the motor also depends to a large extent on the non-sinusoidality of the air gap magnetic field. The higher the harmonic content in the air gap magnetic field, the worse the output torque waveform of the motor, which not only affects the running stability of the motor but also causes axial torsional vibration and crosstalk of the motor, further exacerbating the vibration and noise of the motor.

[0017] By setting, the two arc segment groups are symmetrically arranged with the magnetic pole center line of the rotor punching as the axis of symmetry. In this way, an unequal air gap that changes periodically along the circumferential direction of the rotor punching can be formed between the outer peripheral wall of the rotor and the inner peripheral wall of the stator. In this way, the waveform of the air gap synthesized magnetic field can be optimized, the content of the harmonic magnetic field in the air gap magnetic field can be effectively reduced, the waveform of the air gap magnetic field approaches a sine wave, thereby reducing the cogging torque and torque fluctuation of the motor, which is beneficial to reducing the vibration and noise of the motor. Moreover, when the content of the harmonic magnetic field is reduced, the iron loss generated by the high-frequency harmonic magnetic field can be reduced, and the iron loss of the motor in the high-speed range can be reduced. In this way, it is beneficial to improve the output torque of the motor and improve the product performance of the motor.

[0018] According to the above rotor punching of the present application, the following additional technical features may also be provided:

[0019] In some embodiments, optionally, a, b, c, R1, and R2 satisfy: 0.1 < (b + c) × (R1 - R2) / a < 1.

[0020] In this embodiment, the structure of the rotor punching is further defined such that the minimum distance a from the side of the magnet slot away from the shaft hole to the center of the shaft hole, the distance b from the center of the circle corresponding to the second arc segment to the center of the shaft hole, the distance c from the center of the circle corresponding to the third arc segment to the center of the shaft hole, the radius R1 corresponding to the first arc segment, and the radius R2 corresponding to the fourth arc segment satisfy: 0.1 < (b + c) × (R1 - R2) / a < 1. In this way, it is beneficial to reduce the torque ripple of the motor, weaken the harmonics of the motor, and further reduce the vibration and noise of the motor, which is conducive to improving the product performance and market competitiveness.

[0021] In some embodiments, optionally, the centers of the circles corresponding to the second arc segment and the third arc segment are located on the same side of the center of the shaft hole.

[0022] In this embodiment, the mating structure of the second arc segment, the third arc segment and the shaft hole is further defined such that the centers of the circles corresponding to the second arc segment and the third arc segment are on the same side of the center of the shaft hole.

[0023] It can be understood that the magnetic pole center line passes through the center of the shaft hole, the center of the circle corresponding to the second arc segment and the center of the circle corresponding to the third arc segment, and the centers of the circles corresponding to the second arc segment and the third arc segment are on the same side of the center of the shaft hole.

[0024] This setting indirectly defines the mating structure of the first arc segment, the second arc segment and the third arc segment, and further indirectly defines the changing trend of the air gap formed between the outer peripheral wall of the rotor and the inner peripheral wall of the stator. In this way, the air gap magnetic field distribution of the motor can be adjusted to make the magnetic field distribution of the motor sinusoidal, which is beneficial to reducing the magnetic field harmonics of the motor.

[0025] If the center of the circle corresponding to the second arc segment is on the first side of the shaft hole and the center of the circle corresponding to the third arc segment is on the second side of the shaft hole, then the changing trend of the air gap formed between the outer peripheral wall of the rotor and the inner peripheral wall of the stator changes, and in this way, the harmonics cannot be effectively improved.

[0026] In some embodiments, optionally, the radius corresponding to any one of the second arc segment and the third arc segment is smaller than the radius corresponding to the first arc segment.

[0027] In this embodiment, the structure of the arc segment group is further defined. Specifically, the mating structure of the first arc segment, the second arc segment and the third arc segment is further defined.

[0028] Among them, the radius corresponding to any one of the second arc segment and the third arc segment is smaller than the radius corresponding to the first arc segment. That is, the radius R3 corresponding to the second arc segment is smaller than the radius R1 corresponding to the first arc segment, and the radius R4 corresponding to the third arc segment is smaller than the radius R1 corresponding to the first arc segment.

[0029] Specifically, the center of the circle corresponding to the second arc segment is on the magnetic pole center line of the rotor punching sheet, the center of the circle corresponding to the third arc segment is on the magnetic pole center line of the rotor punching sheet, the radius corresponding to the second arc segment is smaller than the radius corresponding to the first arc segment, and the radius corresponding to the third arc segment is smaller than the radius corresponding to the first arc segment.

[0030] This setting indirectly defines the mating structure of the first arc segment, the second arc segment and the third arc segment, and further indirectly defines the changing trend of the air gap formed between the outer peripheral wall of the rotor and the inner peripheral wall of the stator. In this way, the air gap magnetic field distribution of the motor can be adjusted to make the magnetic field distribution of the motor sinusoidal, which is beneficial to reducing the magnetic field harmonics of the motor.

[0031] It can be understood that the center of the circle corresponding to the second arc segment and the center of the circle corresponding to the third arc segment are located on the same side of the center of the axial hole; and / or the radius corresponding to either the second arc segment or the third arc segment is smaller than the radius corresponding to the first arc segment.

[0032] In some embodiments, optionally, the magnet slot includes two magnetic slot portions, the magnetic slot portion includes an inner end close to the shaft hole and an outer end away from the shaft hole, the inner ends of the two magnetic slot portions are connected to each other, and the outer ends of the two magnet slots are away from each other; the two magnetic slot portions are symmetrically arranged with the magnetic pole center line of the rotor core as the center axis; the magnetic slot portion includes a permanent magnet segment and a magnetic isolation segment, and the magnetic isolation segment is connected to the permanent magnet segment; in the magnetic slot portion, the two permanent magnet segments form an angle α with the end face of the outer peripheral wall of the rotor punching; wherein α and a satisfy: 3.8<α / a<7.1.

[0033] In this embodiment, the structure of the magnet slot is further defined such that the magnet slot includes two magnet slot parts.

[0034] Each of the two magnetic slots includes an inner end and an outer end. The inner end of the magnetic slot is located near the axial hole, while the outer end of the magnetic slot is located away from the axial hole. Furthermore, in the magnet slot, the inner ends of the two magnetic slots are connected to each other, while the outer ends of the two magnetic slots are located away from each other. In other words, the two magnetic slots in the magnet slot are arranged in a "V" shape.

[0035] In the magnet slot, the end surface of the magnet slot portion facing the outer peripheral wall of the rotor sheet is recorded as the reference surface. In the magnet slot, the two reference surfaces of the two magnet slot portions form an angle α.

[0036] The relationship between the included angle α and the minimum value a of the distance from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole is defined to satisfy: 3.8<α / a<7.1.

[0037] In this way, the permanent magnetic field of the rotor can be fully utilized, and the torque output capacity of the motor can be improved.

[0038] If α / a is greater than or equal to 7.1, the angle of the "V"-shaped structure enclosed by the two magnetic slots is smaller, and the distance from the magnet slot to the shaft hole becomes smaller accordingly. This will, on the one hand, waste the material of the permanent magnet of the motor and increase the production cost of the motor. On the other hand, the motor's magnetic gathering ability is weak and the motor's torque output capacity is weak.

[0039] If α / a is less than or equal to 3.8, the angle of the "V"-shaped structure enclosed by the two magnetic slots is larger, and the distance from the magnet slot to the shaft hole becomes larger. Then, the load capacity of the permanent magnet of the motor will be reduced, thus reducing the torque output capacity of the motor.

[0040] That is to say, α and the minimum value a of the distance from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole meet the above parameter limitations, which can take into account both the production cost and the torque output capacity of the motor.

[0041] In some embodiments, optionally, a, b, and c satisfy: b < c < a.

[0042] In this embodiment, the structure of the rotor punching sheet is further defined such that the minimum distance a from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole, the distance b from the center of the circle corresponding to the second arc segment to the center of the shaft hole, and the distance c from the center of the circle corresponding to the third arc segment to the center of the shaft hole satisfy: b < c < a. That is to say, the distance b from the center of the circle corresponding to the second arc segment to the center of the shaft hole is less than the distance c from the center of the circle corresponding to the third arc segment to the center of the shaft hole, and the distance c from the center of the circle corresponding to the third arc segment to the center of the shaft hole is less than the minimum distance a from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole.

[0043] This setting can make the outer peripheral wall shape of the rotor punching sheet more sinusoidal, making the sinusoidality of the formed magnetic field higher and the output torque of the motor during load operation smoother. In this way, it can improve the magnetic field harmonics, further weaken the back electromotive force harmonics, which is beneficial to reducing the torque ripple of the motor and further beneficial to reducing the vibration and noise of the motor.

[0044] In some embodiments, optionally, a satisfies: 17 mm < a < 28 mm.

[0045] In this embodiment, the structure of the rotor punching sheet is further defined such that the minimum distance a from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole is greater than 17 mm and the minimum distance a from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole is less than 28 mm.

[0046] It can be understood that the motor includes a rotor, the rotor includes a rotor core, the rotor core is formed by stacking a plurality of rotor punching sheets, and the magnet slots of the plurality of rotor punching sheets penetrate along the axial direction of the rotor to form a plurality of slots, and a permanent magnet of the motor is arranged in each slot.

[0047] This setting provides a reasonable space for placing the permanent magnet.

[0048] If the minimum distance a from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole is greater than or equal to 28 mm, then the angle of the "V" - shaped structure surrounded by the two magnet slot parts is larger, and the distance from the magnet slot to the shaft hole becomes larger. Then, the load capacity of the permanent magnet of the motor will be reduced, that is, there is not enough space to place the permanent magnet. In this way, the torque output of the motor will be reduced, and the service life of the motor will be shortened.

[0049] If the minimum distance a from the side of the magnet slot facing away from the shaft hole to the center of the shaft hole is less than or equal to 17 mm, then the angle of the "V" - shaped structure surrounded by the two magnet slot parts is smaller, and the distance from the magnet slot to the shaft hole becomes smaller. In this way, the amount of the permanent magnet used will be increased, which will increase the production cost of the motor and reduce the utilization rate of the magnetic field.

[0050] In some embodiments, optionally, the part of the punching body between the magnet slot and the outer peripheral wall of the punching body is the magnetic pole part, and the magnetic pole part is provided with a magnetic field adjusting structure; the magnetic field adjusting structure includes: a first magnetic field adjusting slot located on the magnetic pole center line of the rotor punching; a magnetic field adjusting slot group including two second magnetic field adjusting slots, the first magnetic field adjusting slot is located between the two second magnetic field adjusting slots, and the two second magnetic field adjusting slots are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry.

[0051] In this embodiment, the structure of the rotor punching is further defined such that the part of the punching body between the magnet slot and the outer peripheral wall of the punching body is the magnetic pole part, and the magnetic pole part is provided with a magnetic field adjusting structure. That is to say, the magnetic pole part serves as the installation carrier of the magnetic field adjusting structure, which can ensure the matching dimensions of the magnetic field adjusting structure, the shaft hole and the magnet slot.

[0052] The magnetic field adjusting structure includes a first magnetic field adjusting slot and a magnetic field adjusting slot group, and the magnetic field adjusting slot group includes two second magnetic field adjusting slots. And the matching structure of the first magnetic field adjusting slot and the two second magnetic field adjusting slots is defined such that the first magnetic field adjusting slot is located on the magnetic pole center line of the rotor punching, the first magnetic field adjusting slot is located between the two second magnetic field adjusting slots, and the two second magnetic field adjusting slots are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry.

[0053] In this way, the direction of the magnetic force lines of the motor can be adjusted, the magnetic field distribution can be adjusted, the magnetic leakage can be reduced, and the magnetic field distribution can be made more symmetrical. It is beneficial to reduce the high-frequency radial electromagnetic force of the motor and is beneficial to improving the vibration and noise of the motor.

[0054] In addition, the first magnetic field adjusting slot is located on the magnetic pole center line, which can determine the position of the first magnetic field adjusting slot according to the center of the shaft hole and the center of the magnet slot, providing an effective and reliable structural support for ensuring the controllable direction of the magnetic force lines.

[0055] At the same time, the two second magnetic field adjusting slots are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry. That is to say, the magnetic pole center line is located between the two second magnetic field adjusting slots, and the two second magnetic field adjusting slots are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry.

[0056] By setting two symmetrically arranged second magnetic field adjusting slots to adjust the distribution of the magnetic force lines, the symmetry and sinusoidality of the magnetic field arrangement of the motor are improved, which is beneficial to reducing the magnetic leakage, thereby reducing the torque ripple during the operation of the motor and improving the vibration and noise during the operation of the motor.

[0057] At the same time, this setting can ensure the dynamic balance of the rotor during rotation, reduce the swing of the shafting structure of the compressor, and can effectively improve the content of each harmonic of the air-gap magnetic density of the motor. In this way, on the one hand, the stator iron loss of the motor is reduced, which is beneficial to improving the operating efficiency of the motor, and on the other hand, the vibration and noise of the motor can be improved, thereby reducing the operating noise of the compressor.

[0058] In some embodiments, optionally, the number of the magnetic modulation slot groups is multiple, and the multiple magnetic modulation slot groups are stacked along the direction from the first magnetic modulation slot to the second magnetic modulation slot.

[0059] In this embodiment, the structure of the rotor punching sheet is further defined such that the number of the magnetic modulation slot groups is multiple, and the multiple magnetic modulation slot groups are stacked along the direction from the first magnetic modulation slot to the second magnetic modulation slot. That is to say, the multiple magnetic modulation slot groups are sleeved in sequence. It can be understood that the first magnetic modulation slot has a circumferential first side and a circumferential second side. A plurality of second magnetic modulation slots are arranged at intervals along the circumferential direction of the rotor punching sheet on the circumferential first side of the first magnetic modulation slot, and a plurality of second magnetic modulation slots are arranged at intervals along the circumferential direction of the rotor punching sheet on the circumferential second side of the first magnetic modulation slot.

[0060] This setting further defines the composition of the magnetic modulation structure. In this way, the magnetic field distribution can be adjusted, the magnetic leakage can be reduced, the magnetic field distribution can be made more symmetrical, the high-frequency radial electromagnetic force of the motor can be reduced, and the vibration and noise of the motor can be improved.

[0061] In some embodiments, optionally, the plurality of second magnetic modulation slots located on the same side of the first magnetic modulation slot are arranged in parallel.

[0062] In this embodiment, the matching structure of the first magnetic modulation slot and the multiple magnetic modulation slot groups is further defined such that the plurality of second magnetic modulation slots located on the same side of the first magnetic modulation slot are arranged in parallel.

[0063] It can be understood that the magnetic modulation structure includes a first magnetic modulation group and multiple magnetic modulation slot groups. The first magnetic modulation slot has a circumferential first side and a circumferential second side. Each magnetic modulation slot group includes two second magnetic modulation slots, and the two second magnetic modulation slots are symmetrically arranged with respect to the first magnetic modulation slot. A plurality of second magnetic modulation slots arranged at intervals along the circumferential direction of the rotor punching sheet are provided on the circumferential first side of the first magnetic modulation slot, and a plurality of second magnetic modulation slots arranged at intervals along the circumferential direction of the rotor punching sheet are provided on the circumferential second side of the first magnetic modulation slot.

[0064] This setting can achieve the effect of adjusting the distribution of the magnetic force lines, so as to improve the symmetry and sinusoidality of the magnetic field arrangement of the motor, which is beneficial to reducing the magnetic leakage, thereby reducing the torque ripple during the operation of the motor and improving the vibration and noise during the operation of the motor.

[0065] In some embodiments, optionally, along the outer peripheral wall from the magnet slot to the punching sheet body, the length of the first magnetic modulation slot is less than or equal to the length of the second magnetic modulation slot.

[0066] In this embodiment, the matching structure of the first magnetic modulation slot and the second magnetic modulation slot is further defined such that along the outer peripheral wall from the magnet slot to the punching sheet body, the length t1 of the first magnetic modulation slot is less than or equal to the length t2 of the second magnetic modulation slot.

[0067] That is to say, the length of the first magnetic modulation groove located on the magnetic pole center line is equal to the length of the second magnetic modulation groove located on one side of the magnetic pole center line, or the length of the first magnetic modulation groove located on the magnetic pole center line is shorter than the length of the second magnetic modulation groove located on one side of the magnetic pole center line. The first magnetic modulation groove and the two second magnetic modulation grooves cooperate to adjust the direction of the magnetic force lines of the motor, which is beneficial to reducing magnetic leakage, improving the strength of the rotor, and improving the reliability of the motor during high-speed operation.

[0068] It can be understood that the first magnetic modulation groove is located on the magnetic pole center line, and the position of the first magnetic modulation groove can be determined according to the center of the shaft hole and the center of the magnet groove, providing an effective and reliable structural support for ensuring the controllability of the direction of the magnetic force lines.

[0069] In some embodiments, optionally, at least one riveting portion is provided at the magnetic pole portion, and the riveting portion is located between the first magnetic modulation groove and the second magnetic modulation groove.

[0070] In this embodiment, the structure of the rotor punching sheet is further defined such that at least one riveting portion is provided at the magnetic pole portion.

[0071] A plurality of rotor punching sheets are stacked along the axial direction of the rotor to form a rotor core, and the riveting portions on two adjacent rotor punching sheets can cooperate to connect the plurality of rotor punching sheets to each other in the axial direction, thereby forming a rotor core.

[0072] It can be understood that at least one riveting portion is provided at the magnetic pole portion, the riveting portion is located between the first magnetic modulation groove and the second magnetic modulation groove, and the plurality of riveting portions are arranged at intervals around the shaft hole. This setting can ensure the balance and consistency of the forces on the rotor punching sheet at different positions. In this way, the overall external dimensions of the rotor core can be ensured, and the safety and reliability of product use can be improved.

[0073] In addition, the riveting portion is located between the first magnetic modulation groove and the second magnetic modulation groove, that is, the riveting portion is located on one side of the magnetic pole center line and is adjacent to the first magnetic modulation groove. If the riveting portion is too close to the magnet groove, for example, the riveting portion is arranged between the magnet groove and the magnetic modulation structure, then during the high-speed stamping process of the rotor core mold, the magnet groove will be deformed, resulting in a change in the size of the magnet groove, making the size of the magnet groove not match the size of the permanent magnet. In this way, the process of assembling the permanent magnet into the magnet groove will be affected. That is to say, the position setting of the riveting portion in the present application can ensure the reliability of the riveting of the rotor punching sheet while improving the manufacturability, and can ensure the production efficiency and the yield rate of the product.

[0074] A second aspect of the present invention provides a rotor, including: a rotor core, and the rotor core is formed by stacking a plurality of rotor punching sheets as in the first aspect.

[0075] The rotor provided by the present invention includes a rotor core formed by stacking rotor laminations as in the first aspect. Therefore, it has all the beneficial effects of the above-mentioned rotor laminations, which will not be elaborated one by one here.

[0076] The third aspect of the present invention provides a motor, including: a rotor as in the second aspect.

[0077] The motor provided by the present invention includes a rotor as in the second aspect. Therefore, it has all the beneficial effects of the above-mentioned rotor, which will not be elaborated one by one here.

[0078] The fourth aspect of the present invention provides a compressor, including: a motor as in the third aspect.

[0079] The compressor provided by the present invention includes a motor as in the third aspect. Therefore, it has all the beneficial effects of the above-mentioned motor, which will not be elaborated one by one here.

[0080] The fifth aspect of the present invention provides a vehicle, including: a motor as in the third aspect; or a compressor as in the fourth aspect.

[0081] The vehicle provided by the present invention includes a motor as in the third aspect, or includes a compressor as in the fourth aspect. Therefore, it has all the beneficial effects of the above-mentioned motor or compressor, which will not be elaborated one by one here.

[0082] It should be noted that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0083] The additional aspects and advantages of the present application will become apparent in the following description section, or be learned through the practice of the present application. Description of the Drawings

[0084] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0085] Figure 1 The schematic structural diagram of a rotor lamination showing an embodiment of the present application is presented;

[0086] Figure 2 The schematic structural diagram of a rotor showing an embodiment of the present application is presented;

[0087] Figure 3 The schematic structural diagram of a motor showing an embodiment of the present application is presented;

[0088] Figure 4 The partial schematic structural diagram of a rotor lamination showing an embodiment of the present application is presented;

[0089] Figure 5 The figure shows a comparison data graph of the torque ripple of the motor in the present application and the related art;

[0090] Figure 6 The figure shows a comparison data graph of the proportion of harmonics to the fundamental wave of the motor in the present application and the related art;

[0091] Figure 7 The figure shows a comparison data graph of the cogging torque of the motor in the present application and the related art;

[0092] Figure 8 The figure shows a comparison data graph of the torque of the motor in the present application and the related art;

[0093] Figure 9 The figure shows a schematic curve of the maximum torque of the motor in the present application varying with α / a.

[0094] Wherein, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0095] 1 Rotor punching sheet, 10 Punching sheet body, 100 Shaft hole, 200 Magnet slot, 210 Magnetic slot part, 212 Inner end, 214 Outer end, 216 Permanent magnet segment, 218 Magnetic isolation segment, 300 Arc segment group, 310 First arc segment, 320 Second arc segment, 330 Third arc segment, 400 Inter-pole part, 500 Fourth arc segment, 600 Magnetic pole part, 610 Riveting part, 700 Magnetic field regulating structure, 710 First magnetic field regulating slot, 720 Magnetic field regulating slot group, 722 Second magnetic field regulating slot, 8 Rotor, 82 Rotor core, 84 Permanent magnet, 9 Motor, 90 Stator. Detailed embodiments

[0096] In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0097] Many specific details are set forth in the following description in order to fully understand the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0098] The following refers to Figures 1 to 9 A rotor punching sheet 1, a rotor 8, a motor 9, a compressor and a vehicle according to some embodiments of the present application.

[0099] As Figure 1 、 Figure 2 And Figure 4 Shown, a rotor punching sheet 1 according to some embodiments of the present application includes a punching sheet body 10.

[0100] The punching sheet body 10 is provided with a shaft hole 100 and a plurality of magnet slots 200.

[0101] The plurality of magnet slots 200 are arranged at intervals around the shaft hole 100.

[0102] The part of the outer peripheral wall of the punching sheet body 10 opposite to the magnet slot 200 includes two arc segment groups 300.

[0103] The two arc segment groups 300 are symmetrically arranged with respect to the magnetic pole center line of the rotor punching sheet 1.

[0104] The arc segment group 300 includes a first arc segment 310, a second arc segment 320, and a third arc segment 330 arranged along the circumferential direction of the rotor punching sheet 1.

[0105] The first arc segment 310 is arranged adjacent to the magnetic pole center line of the rotor punching sheet 1.

[0106] The second arc segment 320 is located between the first arc segment 310 and the third arc segment 330.

[0107] Along the circumferential direction of the rotor punching sheet 1, the part of the punching sheet body 10 located between the ends of two adjacent magnet slots 200 is denoted as the inter-pole part 400.

[0108] The part of the outer peripheral wall of the punching sheet body 10 opposite to the inter-pole part 400 is the fourth arc segment 500.

[0109] The center of the circle corresponding to any one of the first arc segment 310 and the fourth arc segment 500 coincides with the center of the shaft hole 100.

[0110] The radius corresponding to the fourth arc segment 500 is smaller than the radius corresponding to the first arc segment 310.

[0111] The center of the circle corresponding to any one of the second arc segment 320 and the third arc segment 330 is located on the magnetic pole center line of the rotor punching sheet 1.

[0112] The minimum value of the distance from the side of the magnet slot 200 facing away from the shaft hole 100 to the center of the shaft hole 100 is denoted as a.

[0113] The distance from the center of the circle corresponding to the second arc segment 320 to the center of the shaft hole 100 is denoted as b.

[0114] The distance from the center of the circle corresponding to the third arc segment 330 to the center of the shaft hole 100 is denoted as c.

[0115] The radius corresponding to the first arc segment 310 is denoted as R1.

[0116] The radius corresponding to the fourth arc segment 500 is denoted as R2.

[0117] Among them, (b + c) × (R1 - R2) < a.

[0118] A rotor punching sheet 1 provided by the present application includes a punching sheet body 10, and the punching sheet body 10 is provided with a plurality of magnet slots 200. The magnet slots 200 are located between the shaft hole 100 and the outer peripheral wall of the punching sheet body 10, and the plurality of magnet slots 200 are arranged at intervals around the shaft hole 100.

[0119] Define the shape of the outer peripheral wall of the punching sheet body 10, so that the part of the outer peripheral wall of the punching sheet body 10 opposite to the magnet slot 200 includes two arc segment groups 300. Along the circumferential direction of the rotor punching sheet 1, the part of the punching sheet body 10 between the ends of two adjacent magnet slots 200 is denoted as the inter-pole part 400, and the part of the outer peripheral wall of the punching sheet body 10 opposite to the inter-pole part 400 is the fourth arc segment 500. It can be understood that the outer peripheral wall of the punching sheet body 10 is divided to form a plurality of regions, each region is arranged opposite to a magnet slot 200, and two arc segment groups 300 are provided at each region. In each region, the two arc segment groups 300 are symmetrically arranged about the magnetic pole center line of the rotor punching sheet 1. A fourth arc segment 500 is clamped between two adjacent regions.

[0120] The arc segment group 300 includes a first arc segment 310, a second arc segment 320 and a third arc segment 330 arranged along the circumferential direction of the rotor punching sheet 1. The first arc segment 310 is arranged adjacent to the magnetic pole center line of the rotor punching sheet 1, and the second arc segment 320 is located between the first arc segment 310 and the third arc segment 330. For example, the first arc segment 310 extends along the circumferential direction of the rotor punching sheet 1 from the magnetic pole center line, the second arc segment 320 is located on the side of the first arc segment 310 away from the magnetic pole center line, and the third arc segment 330 is located on the side of the second arc segment 320 away from the first arc segment 310.

[0121] Further define the matching structure of the first arc segment 310, the second arc segment 320, the third arc segment 330 and the fourth arc segment 500. The center of the circle corresponding to the second arc segment 320 is located on the magnetic pole center line of the rotor punching sheet 1, that is, the center O1 of the circle corresponding to the first arc segment 310 coincides with the center O1 of the shaft hole 100, the center O1 of the circle corresponding to the fourth arc segment 500 coincides with the center O1 of the shaft hole 100, and in addition, the radius of the circle corresponding to the fourth arc segment 500 is smaller than the radius of the circle corresponding to the first arc segment 310. The center of the circle corresponding to any one of the second arc segment 320 and the third arc segment 330 is located on the magnetic pole center line of the rotor punching sheet 1, that is, the center O2 of the circle corresponding to the second arc segment 320 is located on the magnetic pole center line of the rotor punching sheet 1, and the center O3 of the circle corresponding to the third arc segment 330 is located on the magnetic pole center line of the rotor punching sheet 1.

[0122] Wherein, the minimum distance from the side of the magnet slot 200 facing away from the shaft hole 100 to the center of the shaft hole 100 is denoted as a. The distance from the center of the circle corresponding to the second arc segment 320 to the center of the shaft hole 100 is denoted as b. The distance from the center of the circle corresponding to the third arc segment 330 to the center of the shaft hole 100 is denoted as c. The radius corresponding to the first arc segment 310 is denoted as R1. The radius corresponding to the fourth arc segment 500 is denoted as R2. And the relationship among a, b, c, R1 and R2 is defined to satisfy: (b + c)×(R1 - R2) < a.

[0123] That is to say, by defining the relationship among a, b, c, R1 and R2 to satisfy the above relationship definition, in this way, the distribution area of the air gap between the stator 90 and the rotor 8 of the motor 9 can be changed, so that the sinusoidality of the formed magnetic field is higher, and the output torque of the motor 9 during load operation is smoother. In this way, it is beneficial to reduce the torque ripple of the motor 9, and the harmonics of the motor 9 can also be weakened, thereby being able to reduce the vibration and noise of the motor 9, which is beneficial to improving the use performance and market competitiveness of the product.

[0124] On the other hand, the torque ripple of the motor 9 also depends to a great extent on the non-sinusoidality of the air-gap magnetic field. The higher the harmonic content in the air-gap magnetic field, the worse the output torque waveform of the motor 9, which not only affects the running stability of the motor 9, but also causes axial torsional vibration and crosstalk of the motor 9, further aggravating the vibration and noise of the motor 9.

[0125] By setting, the two arc segment groups 300 are symmetrically arranged with respect to the magnetic pole center line of the rotor punching 1. In this way, an unequal air gap that changes periodically along the circumferential direction of the rotor punching 1 can be formed between the outer peripheral wall of the rotor 8 and the inner peripheral wall of the stator 90. In this way, the waveform of the air-gap synthesized magnetic field can be optimized, the content of the harmonic magnetic field in the air-gap magnetic field can be effectively reduced, so that the waveform of the air-gap magnetic field approaches a sine waveform, thereby reducing the cogging torque and torque fluctuation of the motor 9, which is beneficial to reducing the vibration and noise of the motor 9. Moreover, when the content of the harmonic magnetic field is reduced, the iron loss generated by the high-frequency harmonic magnetic field can be reduced, and the iron loss of the motor 9 in the high-speed range can be reduced. In this way, it is beneficial to improve the output torque of the motor 9 and is beneficial to improving the use performance of the motor 9.

[0126] It can be understood that on the axial end face of the rotor punching 1, the connection line between the center of the magnet slot 200 and the center of the shaft hole 100 is the magnetic pole center line, simply referred to as the "d" axis.

[0127] Optionally, the first arc segment 310 includes a first circular arc segment; and / or the second arc segment 320 includes a second circular arc segment; and / or the third arc segment 330 includes a third circular arc segment; and / or the fourth arc segment 500 includes a fourth circular arc segment.

[0128] In some embodiments, optionally, a, b, c, R1, and R2 satisfy: 0.1 < (b + c) × (R1 - R2) / a < 1.

[0129] In this embodiment, the structure of the rotor punching sheet 1 is further defined such that the minimum distance a from the side of the magnet slot 200 facing away from the shaft hole 100 to the center of the shaft hole 100, the distance b from the center of the circle corresponding to the second arc segment 320 to the center of the shaft hole 100, the distance c from the center of the circle corresponding to the third arc segment 330 to the center of the shaft hole 100, the radius R1 corresponding to the first arc segment 310, and the radius R2 corresponding to the fourth arc segment 500 satisfy: 0.1 < (b + c) × (R1 - R2) / a < 1. In this way, it is beneficial to reduce the torque ripple of the motor 9, and can also weaken the harmonics of the motor 9, thereby being able to reduce the vibration noise of the motor 9, which is beneficial to improving the use performance and market competitiveness of the product.

[0130] Optionally, (b + c) × (R1 - R2) / a = 0.2, (b + c) × (R1 - R2) / a = 0.3, (b + c) × (R1 - R2) / a = 0.4, (b + c) × (R1 - R2) / a = 0.5, (b + c) × (R1 - R2) / a = 0.6, (b + c) × (R1 - R2) / a = 0.7, (b + c) × (R1 - R2) / a = 0.8, and (b + c) × (R1 - R2) / a = 0.9, etc., which are not listed one by one here.

[0131] In some embodiments, optionally, as Figure 1 shown, the center of the circle corresponding to the second arc segment 320 and the center of the circle corresponding to the third arc segment 330 are located on the same side of the center of the shaft hole 100.

[0132] In this embodiment, the mating structure of the second arc segment 320, the third arc segment 330, and the shaft hole 100 is further defined such that the center of the circle corresponding to the second arc segment 320 and the center of the circle corresponding to the third arc segment 330 are located on the same side of the center of the shaft hole 100.

[0133] It can be understood that the magnetic pole center line passes through the center of the shaft hole 100, the center of the circle corresponding to the second arc segment 320, and the center of the circle corresponding to the third arc segment 330, and the center of the circle corresponding to the second arc segment 320 and the center of the circle corresponding to the third arc segment 330 are located on the same side of the center of the shaft hole 100.

[0134] This setting indirectly defines the mating structure of the first arc segment 310, the second arc segment 320, and the third arc segment 330, and further indirectly defines the change trend of the air gap formed between the outer peripheral wall of the rotor 8 and the inner peripheral wall of the stator 90. In this way, the air gap magnetic field distribution of the motor 9 can be adjusted to make the magnetic field distribution of the motor 9 sinusoidal, which is beneficial to reducing the magnetic field harmonics of the motor 9.

[0135] If the center of the circle corresponding to the second arc segment 320 is located on the first side of the shaft hole 100 and the center of the circle corresponding to the third arc segment 330 is located on the second side of the shaft hole 100, then the changing trend of the air gap formed between the outer peripheral wall of the rotor 8 and the inner peripheral wall of the stator 90 changes, and thus, the harmonics cannot be effectively improved.

[0136] In some embodiments, optionally, the radius corresponding to any one of the second arc segment 320 and the third arc segment 330 is smaller than the radius corresponding to the first arc segment 310.

[0137] In this embodiment, the structure of the arc segment group 300 is further defined. Specifically, the mating structure of the first arc segment 310, the second arc segment 320, and the third arc segment 330 is further defined.

[0138] Among them, the radius corresponding to any one of the second arc segment 320 and the third arc segment 330 is smaller than the radius corresponding to the first arc segment 310. That is, the radius R3 corresponding to the second arc segment 320 is smaller than the radius R1 corresponding to the first arc segment 310, and the radius R4 corresponding to the third arc segment 330 is smaller than the radius R1 corresponding to the first arc segment 310.

[0139] Specifically, the center of the circle corresponding to the second arc segment 320 is located on the magnetic pole center line of the rotor punching 1, the center of the circle corresponding to the third arc segment 330 is located on the magnetic pole center line of the rotor punching 1, the radius corresponding to the second arc segment 320 is smaller than the radius corresponding to the first arc segment 310, and the radius corresponding to the third arc segment 330 is smaller than the radius corresponding to the first arc segment 310.

[0140] This setting indirectly defines the mating structure of the first arc segment 310, the second arc segment 320, and the third arc segment 330, and further indirectly defines the changing trend of the air gap formed between the outer peripheral wall of the rotor 8 and the inner peripheral wall of the stator 90. In this way, the air gap magnetic field distribution of the motor 9 can be adjusted, making the magnetic field distribution of the motor 9 sinusoidal, which is beneficial to reducing the magnetic field harmonics of the motor 9.

[0141] It can be understood that the center of the circle corresponding to the second arc segment 320 and the center of the circle corresponding to the third arc segment 330 are located on the same side of the center of the shaft hole 100; and / or the radius corresponding to any one of the second arc segment 320 and the third arc segment 330 is smaller than the radius corresponding to the first arc segment 310.

[0142] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the magnet slot 200 includes two magnetic slot portions 210.

[0143] The magnetic slot portion 210 includes an inner end 212 close to the shaft hole 100 and an outer end 214 far from the shaft hole 100.

[0144] The inner ends 212 of the two magnetic slot portions 210 are connected to each other, and the outer ends 214 of the two magnet slots 200 are away from each other.

[0145] The two magnetic slot portions 210 are symmetrically arranged about the magnetic pole center line of the rotor core 82.

[0146] The magnetic slot portion 210 includes a permanent magnet segment 216 and a magnetic isolation segment 218.

[0147] The magnetic isolation segment 218 communicates with the permanent magnet segment 216.

[0148] In the magnetic slot portion 210, an included angle α is formed between the end faces of the two permanent magnet segments 216 facing the outer peripheral wall of the rotor punching 1.

[0149] Wherein, α and a satisfy: 3.8 < α / a < 7.1.

[0150] In this embodiment, the structure of the magnet slot 200 is further defined such that the magnet slot 200 includes two magnetic slot portions 210.

[0151] Any one of the two magnetic slot portions 210 in the two magnetic slot portions 210 includes an inner end 212 and an outer end 214. The inner end 212 of the magnetic slot portion 210 is arranged close to the shaft hole 100, and the outer end 214 of the magnetic slot portion 210 is arranged away from the shaft hole 100. And, in the magnet slot 200, the inner ends 212 of the two magnetic slot portions 210 are connected to each other, and the outer ends 214 of the two magnetic slot portions 210 are away from each other. That is, the two magnetic slot portions 210 in the magnet slot 200 are arranged in a "V" shape.

[0152] In the magnet slot 200, the end face of the magnetic slot portion 210 facing the outer peripheral wall of the rotor punching 1 is denoted as the reference plane. In the magnet slot 200, an included angle α is formed between the two reference planes of the two magnetic slot portions 210.

[0153] And the relationship between the included angle α and the minimum distance a from the side of the magnet slot 200 away from the shaft hole 100 to the center of the shaft hole 100 is defined to satisfy: 3.8 < α / a < 7.1.

[0154] In this way, the permanent magnet magnetic field of the rotor 8 can be fully utilized, and the torque output ability of the motor 9 can be improved.

[0155] If α / a is greater than or equal to 7.1, then the angle of the "V" - shaped structure enclosed by the two magnetic slot portions 210 is smaller, and the distance from the magnet slot 200 to the shaft hole 100 becomes smaller. In this way, on the one hand, the material of the permanent magnet 84 of the motor 9 will be wasted, and the production cost of the motor 9 will increase. On the other hand, the magnetic concentration ability of the motor 9 is weak, and the torque output ability of the motor 9 is weak.

[0156] If α / a is less than or equal to 3.8, then the angle of the "V" - shaped structure enclosed by the two magnetic slots 210 is relatively large, and the distance from the magnet slot 200 to the shaft hole 100 becomes larger. Then, the load - bearing capacity of the permanent magnet 84 of the motor 9 will be reduced, and in this way, the torque output ability of the motor 9 will be decreased.

[0157] That is to say, when α and the minimum distance a from the side of the magnet slot 200 away from the shaft hole 100 to the center of the shaft hole 100 satisfy the above - mentioned parameter limitations, the production cost of the motor 9 and the torque output ability can be taken into account.

[0158] Optionally, α / a = 4, α / a = 4.5, α / a = 5, α / a = 5.5, α / a = 6, α / a = 6.5, and α / a = 7, etc., which are not listed one by one here.

[0159] In some embodiments, optionally, a, b, and c satisfy: b < c < a.

[0160] In this embodiment, the structure of the rotor punching sheet 1 is further limited, so that the minimum distance a from the side of the magnet slot 200 away from the shaft hole 100 to the center of the shaft hole 100, the distance b from the center of the circle corresponding to the second arc segment 320 to the center of the shaft hole 100, and the distance c from the center of the circle corresponding to the third arc segment 330 to the center of the shaft hole 100 satisfy: b < c < a. That is to say, the distance b from the center of the circle corresponding to the second arc segment 320 to the center of the shaft hole 100 is less than the distance c from the center of the circle corresponding to the third arc segment 330 to the center of the shaft hole 100, and the distance c from the center of the circle corresponding to the third arc segment 330 to the center of the shaft hole 100 is less than the minimum distance a from the side of the magnet slot 200 away from the shaft hole 100 to the center of the shaft hole 100.

[0161] This setting can make the outer peripheral wall shape of the rotor punching sheet 1 more sinusoidal, make the sinusoidality of the formed magnetic field higher, and the output torque during the load operation of the motor 9 smoother. In this way, the magnetic field harmonics can be improved, the back - electromotive - force harmonics can be further weakened, which is beneficial to reducing the torque ripple of the motor 9, and further beneficial to reducing the vibration and noise of the motor 9.

[0162] In some embodiments, optionally, a satisfies: 17mm < a < 28mm.

[0163] In this embodiment, the structure of the rotor punching sheet 1 is further limited, so that the minimum distance a from the side of the magnet slot 200 away from the shaft hole 100 to the center of the shaft hole 100 is greater than 17mm, and the minimum distance a from the side of the magnet slot 200 away from the shaft hole 100 to the center of the shaft hole 100 is less than 28mm.

[0164] It can be understood that the motor 9 includes a rotor 8, and the rotor 8 includes a rotor core 82 which is formed by stacking a plurality of rotor punching sheets 1. The magnet slots 200 of the plurality of rotor punching sheets 1 penetrate along the axial direction of the rotor 8 to form a plurality of slots, and a permanent magnet 84 of the motor 9 is arranged in each slot.

[0165] This setting provides a reasonable space for placing the permanent magnet 84.

[0166] If the minimum distance a from the side of the magnet slot 200 facing away from the shaft hole 100 to the center of the shaft hole 100 is greater than or equal to 28 mm, then the angle of the "V" - shaped structure surrounded by the two magnet groove parts 210 is larger, and the distance from the magnet slot 200 to the shaft hole 100 becomes larger. Then, the load - bearing capacity of the permanent magnet 84 of the motor 9 will be reduced, that is, there is not enough space to place the permanent magnet 84. In this way, the torque output of the motor 9 will be reduced, and the service life of the motor 9 will be shortened.

[0167] If the minimum distance a from the side of the magnet slot 200 facing away from the shaft hole 100 to the center of the shaft hole 100 is less than or equal to 17 mm, then the angle of the "V" - shaped structure surrounded by the two magnet groove parts 210 is smaller, and the distance from the magnet slot 200 to the shaft hole 100 becomes smaller. In this way, the amount of the permanent magnet 84 will be increased, and thus the production cost of the motor 9 will be increased, and the utilization rate of the magnetic field will be reduced.

[0168] Optionally, a = 19 mm, a = 20 mm, a = 22 mm, a = 24 mm, a = 25 mm, a = 26 mm, and a = 27 mm, etc., which are not listed one by one here.

[0169] In some embodiments, optionally, as Figure 1 、 Figure 2 and Figure 4 shown, the part of the punching - sheet body 10 between the magnet slot 200 and the outer peripheral wall of the punching - sheet body 10 is the magnetic - pole part 600.

[0170] The magnetic - pole part 600 is provided with a magnetic - field - adjusting structure 700.

[0171] The magnetic - field - adjusting structure 700 includes a first magnetic - field - adjusting slot 710 and a magnetic - field - adjusting slot group 720.

[0172] The first magnetic - field - adjusting slot 710 is located on the magnetic - pole center line of the rotor punching sheet 1.

[0173] The magnetic - field - adjusting slot group 720 includes two second magnetic - field - adjusting slots 722.

[0174] The first magnetic - field - adjusting slot 710 is located between the two second magnetic - field - adjusting slots 722.

[0175] The two second magnetic - field - adjusting slots 722 are symmetrically arranged with respect to the magnetic - pole center line as the axis of symmetry.

[0176] In this embodiment, the structure of the rotor punching sheet 1 is further defined such that the portion of the punching sheet body 10 between the magnet slots 200 and the outer peripheral wall of the punching sheet body 10 is the magnetic pole portion 600, and the magnetic pole portion 600 is provided with a magnetic field adjusting structure 700. That is, the magnetic pole portion 600 serves as the installation carrier of the magnetic field adjusting structure 700, which can ensure the matching dimensions of the magnetic field adjusting structure 700, the shaft hole 100, and the magnet slots 200.

[0177] The magnetic field adjusting structure 700 includes a first magnetic field adjusting slot 710 and a magnetic field adjusting slot group 720. The magnetic field adjusting slot group 720 includes two second magnetic field adjusting slots 722. And the matching structure of the first magnetic field adjusting slot 710 and the two second magnetic field adjusting slots 722 is defined such that the first magnetic field adjusting slot 710 is located on the magnetic pole center line of the rotor punching sheet 1, the first magnetic field adjusting slot 710 is located between the two second magnetic field adjusting slots 722, and the two second magnetic field adjusting slots 722 are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry.

[0178] In this way, the direction of the magnetic force lines of the motor 9 can be adjusted, the magnetic field distribution can be adjusted, magnetic leakage can be reduced, and the magnetic field distribution can be made more symmetrical. It is beneficial to reduce the high-frequency radial electromagnetic force of the motor 9 and is beneficial to improving the vibration and noise of the motor 9.

[0179] In addition, the first magnetic field adjusting slot 710 is located on the magnetic pole center line, which can determine the position of the first magnetic field adjusting slot 710 according to the center of the shaft hole 100 and the center of the magnet slots 200, providing an effective and reliable structural support for ensuring the controllability of the magnetic force line direction.

[0180] At the same time, the two second magnetic field adjusting slots 722 are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry. That is, the magnetic pole center line is located between the two second magnetic field adjusting slots 722, and the two second magnetic field adjusting slots 722 are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry.

[0181] By providing two symmetrically arranged second magnetic field adjusting slots 722 to adjust the distribution of the magnetic force lines, the symmetry and sinusoidality of the magnetic field arrangement of the motor 9 are improved, which is beneficial to reducing magnetic leakage, thereby reducing the torque ripple during the operation of the motor 9 and improving the vibration and noise during the operation of the motor 9.

[0182] At the same time, this setting can ensure the dynamic balance of the rotor 8 during rotation, reduce the swing of the shafting structure of the compressor, and can effectively improve the content of each harmonic of the air-gap magnetic density of the motor 9. In this way, on the one hand, the iron loss of the stator 90 of the motor 9 is reduced, which is beneficial to improving the operating efficiency of the motor 9, and on the other hand, the vibration and noise of the motor 9 can be improved, thereby reducing the operating noise of the compressor.

[0183] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the number of the magnetic field adjusting slot groups 720 is multiple.

[0184] A plurality of magnetic modulation slot groups 720 are stacked in the direction from the first magnetic modulation slot 710 to the second magnetic modulation slot 722.

[0185] In this embodiment, the structure of the rotor punching sheet 1 is further defined such that the number of magnetic modulation slot groups 720 is plural, and the plurality of magnetic modulation slot groups 720 are stacked in the direction from the first magnetic modulation slot 710 to the second magnetic modulation slot 722. That is to say, the plurality of magnetic modulation slot groups 720 are sleeved in sequence. It can be understood that the first magnetic modulation slot 710 has a circumferential first side and a circumferential second side. A plurality of second magnetic modulation slots 722 are arranged at intervals in the circumferential direction of the rotor punching sheet 1 on the circumferential first side of the first magnetic modulation slot 710, and a plurality of second magnetic modulation slots 722 are arranged at intervals in the circumferential direction of the rotor punching sheet 1 on the circumferential second side of the first magnetic modulation slot 710.

[0186] This setting further defines the composition of the magnetic modulation structure 700. In this way, the magnetic field distribution can be adjusted, the magnetic leakage can be reduced, the magnetic field distribution can be made more symmetrical, the high-frequency radial electromagnetic force of the motor 9 can be reduced, and the vibration and noise of the motor 9 can be improved.

[0187] In some embodiments, optionally, the plurality of second magnetic modulation slots 722 located on the same side of the first magnetic modulation slot 710 are arranged in parallel.

[0188] In this embodiment, the matching structure of the first magnetic modulation slot 710 and the plurality of magnetic modulation slot groups 720 is further defined such that the plurality of second magnetic modulation slots 722 located on the same side of the first magnetic modulation slot 710 are arranged in parallel.

[0189] It can be understood that the magnetic modulation structure 700 includes a first magnetic modulation group and a plurality of magnetic modulation slot groups 720. The first magnetic modulation slot 710 has a circumferential first side and a circumferential second side. Each magnetic modulation slot group 720 includes two second magnetic modulation slots 722, and the two second magnetic modulation slots 722 are symmetrically arranged with respect to the first magnetic modulation slot 710. A plurality of second magnetic modulation slots 722 are arranged at intervals in the circumferential direction of the rotor punching sheet 1 on the circumferential first side of the first magnetic modulation slot 710, and a plurality of second magnetic modulation slots 722 are arranged at intervals in the circumferential direction of the rotor punching sheet 1 on the circumferential second side of the first magnetic modulation slot 710.

[0190] This setting can achieve the effect of adjusting the distribution of magnetic force lines, so as to improve the symmetry and sinusoidality of the magnetic field arrangement of the motor 9, which is beneficial to reducing magnetic leakage, thereby reducing the torque ripple during the operation of the motor 9 and improving the vibration and noise during the operation of the motor 9.

[0191] In some embodiments, optionally, as Figure 1 and Figure 4 shown, along the magnet slot 200 to the outer peripheral wall of the punching sheet body 10, the length of the first magnetic modulation slot 710 is less than or equal to the length of the second magnetic modulation slot 722.

[0192] In this embodiment, the mating structure of the first magnetic modulation groove 710 and the second magnetic modulation groove 722 is further defined such that along the outer peripheral wall of the magnet groove 200 to the lamination body 10, the length t1 of the first magnetic modulation groove 710 is less than or equal to the length t2 of the second magnetic modulation groove 722.

[0193] That is to say, the length of the first magnetic modulation groove 710 located on the magnetic pole center line is equal to the length of the second magnetic modulation groove 722 located on one side of the magnetic pole center line, or the length of the first magnetic modulation groove 710 located on the magnetic pole center line is shorter than the length of the second magnetic modulation groove 722 located on one side of the magnetic pole center line. The first magnetic modulation groove 710 and the two second magnetic modulation grooves 722 cooperate to adjust the magnetic field line direction of the motor 9, which is beneficial to reducing magnetic leakage, improving the strength of the rotor 8, and improving the reliability of the motor 9 during high-speed operation.

[0194] It can be understood that the first magnetic modulation groove 710 is located on the magnetic pole center line, and the position of the first magnetic modulation groove 710 can be determined according to the center of the shaft hole 100 and the center of the magnet groove 200, providing an effective and reliable structural support for ensuring the controllability of the magnetic field line direction.

[0195] In some embodiments, optionally, as Figure 2 shown, at least one riveting portion 610 is provided at the magnetic pole portion 600.

[0196] The riveting portion 610 is located between the first magnetic modulation groove 710 and the second magnetic modulation groove 722.

[0197] In this embodiment, the structure of the rotor lamination 1 is further defined such that at least one riveting portion 610 is provided at the magnetic pole portion 600.

[0198] A plurality of rotor laminations 1 are stacked along the axial direction of the rotor 8 to form a rotor core 82. The riveting portions 610 on two adjacent rotor laminations 1 can cooperate to connect the plurality of rotor laminations 1 to each other axially, thereby forming the rotor core 82.

[0199] It can be understood that at least one riveting portion 610 is provided at the magnetic pole portion 600, the riveting portion 610 is located between the first magnetic modulation groove 710 and the second magnetic modulation groove 722, and the plurality of riveting portions 610 are arranged at intervals around the shaft hole 100. This setting can ensure the balance and consistency of the forces at different positions of the rotor lamination 1, and thus can ensure the overall external dimensions of the rotor core 82, improving the safety and reliability of product use.

[0200] In addition, the riveting portion 610 is located between the first magnetic adjustment groove 710 and the second magnetic adjustment groove 722, that is, the riveting portion 610 is located on one side of the magnetic pole center line, and the riveting portion 610 is arranged adjacent to the first magnetic adjustment groove 710. If the riveting portion 610 is too close to the magnet groove 200, for example, the riveting portion 610 is arranged between the magnet groove 200 and the magnetic adjustment structure 700, then during the high-speed stamping of the mold of the rotor core 82, deformation will occur at the magnet groove 200, resulting in a change in the size of the magnet groove 200, making the size of the magnet groove 200 not match the size of the permanent magnet 84. In this way, it will affect the process of assembling the permanent magnet 84 into the magnet groove 200. That is to say, the position setting of the riveting portion 610 in the present application can ensure the riveting reliability of the rotor punching sheet 1 while improving manufacturability, ensuring the production efficiency and the yield rate of the product. It can also avoid the deformation of the magnet groove 200 during the stamping manufacture of the rotor core 82, which affects the assembly of the rotor core 82 and the permanent magnet 84.

[0201] As Figure 2 shown, a rotor 8 according to some other embodiments of the present application includes: a rotor core 82, and the rotor core 82 is formed by stacking a plurality of rotor punching sheets 1 as described in any of the above embodiments.

[0202] The rotor 8 provided by the present application includes a rotor core 82 formed by stacking the rotor punching sheets 1 as described in any of the above embodiments. Therefore, it has all the beneficial effects of the above rotor punching sheet 1, and will not be elaborated one by one here.

[0203] As Figure 3 shown, an electric motor 9 according to some other embodiments of the present application includes: the rotor 8 as described in the above embodiments.

[0204] The electric motor 9 provided by the present application includes the rotor 8 as described in the above embodiments. Therefore, it has all the beneficial effects of the above rotor 8, and will not be elaborated one by one here.

[0205] A compressor according to some other embodiments of the present application includes: the electric motor 9 as described in the above embodiments.

[0206] The compressor provided by the present application includes the electric motor 9 as described in the above embodiments. Therefore, it has all the beneficial effects of the above electric motor 9, and will not be elaborated one by one here.

[0207] A vehicle according to some other embodiments of the present application includes: the electric motor 9 as described in the above embodiments; or the compressor as described in the above embodiments.

[0208] The vehicle provided by the present application includes the electric motor 9 or the compressor as described in the above embodiments. Therefore, it has all the beneficial effects of the above electric motor 9 or the compressor, and will not be elaborated one by one here.

[0209] It should be noted that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0210] In this application, the structure of the motor 9 (such as, a permanent magnet motor) is reasonably set, which can weaken the harmonics of the motor 9 and reduce the torque ripple, thereby improving the vibration and noise of the motor 9.

[0211] The motor 9 includes a rotor 8.

[0212] The rotor 8 includes a magnet slot 200, a permanent magnet 84, a pole part 600, an inter-pole part 400, a rotating shaft, and a magnetic flux regulation structure 700.

[0213] The permanent magnet 84 is placed in the V-shaped magnet slot 200, and the magnetic flux regulation structure 700 is placed in the pole part 600.

[0214] The part of the outer peripheral wall of the punching sheet body 10 opposite to the magnet slot 200 includes three non-concentric arcs.

[0215] Specifically, the part of the outer peripheral wall of the punching sheet body 10 opposite to the magnet slot 200 includes two arc segment groups 300, and the two arc segment groups 300 are symmetrically distributed about the pole center line. The arc segment group 300 includes a first arc segment 310, a second arc segment 320, and a third arc segment 330.

[0216] The center of the circle corresponding to the first arc segment 310 is concentric with the center of the shaft hole 100.

[0217] The part of the punching sheet body 10 opposite to the inter-pole part 400 includes a fourth arc segment 500. The center of the circle corresponding to the fourth arc segment 500 is concentric with the center of the shaft hole 100, and the radius corresponding to the fourth arc segment 500 is smaller than the radius corresponding to the first arc segment 310.

[0218] The center O2 of the circle corresponding to the second arc segment 320 and the center O3 of the circle corresponding to the third arc segment 330 are located on the straight line where the pole center line is located, satisfying 0.1 < (b + c) × (R1 - R2) / a < 1. Wherein, b is the distance from the center of the circle corresponding to the second arc segment 320 to the center of the shaft hole 100, c is the distance from the center of the circle corresponding to the third arc segment 330 to the center of the shaft hole 100, a is the shortest distance from the side of the V-shaped magnet slot close to the outer peripheral wall of the punching sheet body 10 to the center of the shaft hole 100, R1 is the radius corresponding to the first arc segment 310, and R2 is the radius corresponding to the fourth arc segment 500.

[0219] The motor 9 of this application can weaken the harmonics of the motor 9 and reduce the torque ripple, thereby improving the vibration and noise of the motor 9.

[0220] The centers of the circle corresponding to the second arc segment 320 and the center of the circle corresponding to the third arc segment 330 are located on the same side of the center of the shaft hole 100.

[0221] The radius corresponding to any one of the second arc segment 320 and the third arc segment 330 is smaller than the radius corresponding to the first arc segment 310.

[0222] The magnet groove 200 includes two magnet groove parts 210. The magnet groove part 210 includes a permanent magnet segment 216 and a magnetic isolation segment 218, and the permanent magnet segment 216 and the magnetic isolation segment 218 are connected. In the magnet groove part 210, an included angle α is formed between the end faces of the two permanent magnet segments 216 facing the outer peripheral wall of the rotor punching sheet 1, where 3.8 < α / a < 7.1.

[0223] a, b, and c satisfy: b < c < a, 17mm < a < 28mm.

[0224] Each magnetic pole part 600 is provided with a magnetic field adjusting structure 700. The magnetic field adjusting structure 700 includes a first magnetic field adjusting groove 710 and two magnetic field adjusting groove groups 720. The first magnetic field adjusting groove 710 is located on the magnetic pole center line, and the two magnetic field adjusting groove groups 720 are symmetric about the magnetic pole center line respectively.

[0225] Taking a 12-slot 8-pole motor 9 as an example for illustration.

[0226] a, b, c, R1, and R2 satisfy: 0.1 < (b + c)×(R1 - R2) / a < 1. This setting can weaken the harmonics of the motor 9, reduce the torque ripple of the motor 9, and reduce the vibration and noise of the motor 9.

[0227] Figure 1 As shown, the center O2 of the circle corresponding to the second arc segment 320 and the center O3 of the circle corresponding to the third arc segment 330 are located on the same side of the center of the shaft hole 100. The radius corresponding to the second arc segment 320 is smaller than the radius corresponding to the first arc segment 310, and the radius corresponding to the third arc segment 330 is smaller than the radius corresponding to the first arc segment 310. This setting can adjust the air-gap magnetic field distribution of the motor 9, make the magnetic field distribution of the motor 9 sinusoidal, and reduce the magnetic field harmonics of the motor 9.

[0228] α and a satisfy: 3.8 < α / a < 7.1. This setting can make full use of the permanent magnet magnetic field of the rotor 8 and improve the torque output ability of the motor 9.

[0229] a, b, and c satisfy: b < c < a, which can make the shape of the outer peripheral wall of the rotor 8 more sinusoidal, is beneficial to improving the magnetic field harmonics, further weakening the back electromotive force harmonics, and reducing the torque ripple.

[0230] Among them, 17 mm < a < 28 mm, which can provide a reasonable space for the placement of the permanent magnet 84. If a is greater than or equal to 28 mm, there is not enough space to place the permanent magnet 84, reducing the torque output of the motor 9. If a is less than or equal to 17 mm, the permanent magnet 84 is close to the shaft hole 100, increasing the amount of the permanent magnet 84 and thus the cost, and reducing the magnetic field utilization rate.

[0231] Each magnetic pole part 600 is provided with a magnetic field adjusting structure 700. The magnetic field adjusting structure 700 includes a first magnetic field adjusting groove 710 and two magnetic field adjusting groove groups 720. The first magnetic field adjusting groove 710 is located on the magnetic pole center line, and the two magnetic field adjusting groove groups 720 are symmetric about the magnetic pole center line of the rotor punching sheet 1 respectively. This setting can adjust the magnetic field distribution, reduce magnetic leakage, make the magnetic field distribution more symmetric, reduce the high-frequency radial electromagnetic force of the motor 9, and improve the vibration and noise of the motor 9.

[0232] In the related art, the outer peripheral wall of the rotor is provided with a structure of a complete circle, that is, the outer peripheral wall of the rotor is not provided with an arc segment group.

[0233] As Figure 5 shown, when a, b, c, R1 and R2 satisfy 0.1 < (b + c) × (R1 - R2) / a < 1, the torque ripple of the motor 9 is at a low level, and at this time, the vibration and noise of the motor 9 can be effectively reduced.

[0234] Specifically, taking b = 10 mm, c = 15 mm, R1 = 30.5 mm, and R2 = 30.3 mm as an example for analysis, at this time, 0.1 < (b + c) × (R1 - R2) / a < 1 is satisfied. Figure 5 、 Figure 6 and Figure 7 respectively show the back electromotive force harmonic content diagram, no-load cogging torque curve diagram and load torque component comparison diagram according to an embodiment of the present application.

[0235] As Figure 6 shown, compared with the related art, the rotor 8 proposed by the present application can significantly reduce the 5th, 7th and 11th back electromotive force harmonics of the motor 9, and the back electromotive force harmonic distortion of the motor 9 is lower, which is beneficial to improving the torque ripple of the motor 9.

[0236] As Figure 7 shown, compared with the related art, the cogging torque is significantly reduced, and the peak-to-peak value of the cogging torque is reduced from 1.11 Nm to 0.19 Nm, which can significantly improve the vibration and noise of the motor 9.

[0237] As Figure 8As shown, under the same conditions, compared with the related art, for the rotor 8 proposed by the present invention, the peak-to-peak value of the load torque is reduced by 17.4%, and the torque components at 24 times frequency and 48 times frequency are reduced by 15.6% and 38.8% respectively, which can greatly reduce the torque fluctuation and high-frequency torque pulsation components and improve the vibration and noise of the motor 9.

[0238] That is to say, the rotor 8 of the present application can weaken the harmonics of the motor 9, reduce the torque pulsation of the motor 9, and thus reduce the vibration and noise of the motor 9.

[0239] Optionally, as Figure 3 shown, the motor 9 includes a rotor 8 and a stator 90. The rotor 8 is rotationally connected to the stator 90.

[0240] As Figure 9 shown, the maximum torque of the motor 9 changes with the value of α / a. When 3.8 < α / a < 7.1, the maximum torque of the motor 9 is high and can meet the usage requirements of the target value.

[0241] In the present application, the term "a plurality" means two or more, unless otherwise clearly defined. Terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0242] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments" and the like 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 application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotor punching sheet, characterized in that, Including: A punching sheet body, the punching sheet body is provided with a shaft hole and a plurality of magnet slots, and the plurality of magnet slots are arranged at intervals around the shaft hole; The part of the outer peripheral wall of the punching sheet body opposite to the magnet slot includes two arc segment groups, and the two arc segment groups are symmetrically arranged with respect to the magnetic pole center line of the rotor punching sheet. The arc segment group includes a first arc segment, a second arc segment and a third arc segment arranged along the circumferential direction of the rotor punching sheet. The first arc segment is arranged adjacent to the magnetic pole center line of the rotor punching sheet, and the second arc segment is located between the first arc segment and the third arc segment; Along the circumferential direction of the rotor punching sheet, the part of the punching sheet body between the ends of two adjacent magnet slots is denoted as an inter-pole part, and the part of the outer peripheral wall of the punching sheet body opposite to the inter-pole part is a fourth arc segment; The center of the circle corresponding to any one of the first arc segment and the fourth arc segment coincides with the center of the shaft hole, and the radius corresponding to the fourth arc segment is smaller than the radius corresponding to the first arc segment; The center of the circle corresponding to any one of the second arc segment and the third arc segment is located on the magnetic pole center line of the rotor punching sheet; The minimum value of the distance from the side of the magnet slot away from the shaft hole to the center of the shaft hole is denoted as a, the distance from the center of the circle corresponding to the second arc segment to the center of the shaft hole is denoted as b, the distance from the center of the circle corresponding to the third arc segment to the center of the shaft hole is denoted as c, the radius corresponding to the first arc segment is denoted as R1, and the radius corresponding to the fourth arc segment is denoted as R2. Wherein, (b + c)×(R1 - R2) < a.

2. The rotor punching sheet according to claim 1, characterized in that, a, b, c, R1 and R2 satisfy: 0.1 < (b + c)×(R1 - R2) / a < 1.

3. The rotor punching sheet according to claim 1 or 2, characterized in that, The center of the circle corresponding to the second arc segment and the center of the circle corresponding to the third arc segment are located on the same side of the center of the shaft hole.

4. The rotor punching sheet according to claim 1 or 2, characterized in that, The radius corresponding to any one of the second arc segment and the third arc segment is smaller than the radius corresponding to the first arc segment.

5. The rotor punching sheet according to claim 1 or 2, characterized in that, The magnet slot includes two magnet slot parts, the magnet slot part includes an inner end close to the shaft hole and an outer end far from the shaft hole, the inner ends of the two magnet slot parts are connected to each other, and the outer ends of the two magnet slots are far from each other; The two magnet slot parts are symmetrically arranged with respect to the magnetic pole center line of the rotor core; The magnet slot part includes a permanent magnet segment and a magnetic isolation segment, and the magnetic isolation segment is communicated with the permanent magnet segment; In the magnet slot part, the end faces of the two permanent magnet segments facing the outer peripheral wall of the rotor punching sheet form an included angle α; Wherein, α and a satisfy: 3.8 < α / a < 7.

1.

6. The rotor punching sheet according to claim 1 or 2, characterized in that, a, b and c satisfy: b < c < a.

7. The rotor punching sheet according to claim 1 or 2, characterized in that, a satisfies: 17mm < a < 28mm.

8. The rotor punching sheet according to claim 1 or 2, characterized in that The part of the punching sheet body between the magnet slot and the outer peripheral wall of the punching sheet body is a magnetic pole part, and the magnetic pole part is provided with a magnetic field adjustment structure; The magnetic field adjustment structure includes: A first magnetic field adjustment slot, the first magnetic field adjustment slot is located on the magnetic pole center line of the rotor punching sheet; A magnetic field adjustment slot group, the magnetic field adjustment slot group includes two second magnetic field adjustment slots, the first magnetic field adjustment slot is located between the two second magnetic field adjustment slots, and the two second magnetic field adjustment slots are symmetrically arranged with respect to the magnetic pole center line.

9. The rotor punching sheet according to claim 8, characterized in that, The number of the magnetic modulation slot groups is multiple, and the multiple magnetic modulation slot groups are stacked along the direction from the first magnetic modulation slot to the second magnetic modulation slot.

10. The rotor punching sheet according to claim 9, characterized in that, The multiple second magnetic modulation slots located on the same side of the first magnetic modulation slot are arranged in parallel.

11. The rotor punching sheet according to claim 8, characterized in that, Along the magnetic body slot to the outer peripheral wall of the punching sheet body, the length of the first magnetic modulation slot is less than or equal to the length of the second magnetic modulation slot.

12. The rotor punching sheet according to claim 8, characterized in that, At least one riveting buckle part is arranged at the magnetic pole part, and the riveting buckle part is located between the first magnetic modulation slot and the second magnetic modulation slot.

13. A rotor, characterized in that, Comprising: A rotor core, which is formed by stacking a plurality of rotor punching sheets as described in any one of claims 1 to 12.

14. A motor, characterized in that, Comprising: The rotor as described in claim 13.

15. A compressor, characterized in that, Comprising: The motor as described in claim 14.

16. A vehicle, characterized in that, Comprising: The motor as described in claim 14; Or The compressor as described in claim 15.

Images