Stator punching sheet, stator core, stator assembly, motor, power assembly and vehicle

Abstract

The invention relates to a stator punching sheet, a stator core, a stator assembly, a motor, a power assembly and a vehicle, and the stator punching sheet is at least made of an amorphous alloy material. The plurality of tooth parts are arranged around a central axis at intervals, and the plurality of tooth parts are respectively connected to the yoke part; wherein the tooth part comprises a tooth body and a tooth shoulder, and the tooth body is connected between the tooth shoulder and the yoke part; at least part of the tooth shoulders are provided with grooves, and the grooves are formed in at least one side of the tooth shoulders in the circumferential direction. According to the stator punching sheet provided by the embodiment of the invention, on the basis that the stator punching sheet is at least made of the amorphous alloy material, the grooves are formed in at least one side of the tooth shoulders in the circumferential direction, so that the distance between the adjacent tooth shoulders of the corresponding parts of the grooves is increased on the premise that the overall width of the tooth shoulders is not influenced, and the magnetic resistance between the adjacent tooth shoulders is increased; and a magnetic field flowing between adjacent tooth shoulders is effectively reduced, so that magnetic leakage is reduced, and the problem of local saturation is solved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a stator punching sheet, a stator core, a stator assembly, a motor, a powertrain and a vehicle. Background Art

[0002] At present, some motors use amorphous alloy materials instead of traditional silicon steel sheets to manufacture the stator core of the motor. For amorphous alloy materials, their saturation magnetic density and relative magnetic permeability are lower, but they are easier to saturate than traditional silicon steel materials.

[0003] In the related art, a tooth shoulder is provided on each tooth portion of the stator punching sheet to limit the position of the subsequently embedded winding. However, due to the small spacing between adjacent tooth shoulders, the magnetic resistance is small, and magnetic leakage is likely to occur between adjacent tooth shoulders, resulting in local saturation. Summary of the invention

[0004] The embodiments of the present application provide a stator punching sheet, a stator core, a stator assembly, a motor, a powertrain and a vehicle, which improve the local saturation of the stator punching sheet to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a stator punching sheet is provided, wherein the stator punching sheet is made of at least an amorphous alloy material, and the stator punching sheet comprises:

[0006] yoke;

[0007] A plurality of teeth are arranged at intervals around a central axis, and the plurality of teeth are respectively connected to the yoke;

[0008] Wherein, the tooth portion comprises a tooth body and a tooth shoulder, and the tooth body is connected between the tooth shoulder and the yoke portion;

[0009] At least a portion of the tooth shoulders are provided with grooves, and the grooves are provided on at least one side of the tooth shoulders in the circumferential direction.

[0010] Optionally, in some embodiments of the present application, the grooves are provided on both sides of the tooth shoulder in the circumferential direction.

[0011] Optionally, in some embodiments of the present application, the tooth shoulder includes a first shoulder segment and a second shoulder segment connected in the radial direction, the groove is arranged in the second shoulder segment, and the first shoulder segment is between the second shoulder segment and the tooth portion; the first shoulder segment forms protrusions on both sides of the circumferential direction.

[0012] Optionally, in some embodiments of the present application, in a projection plane perpendicular to the central axis, the groove is in a first arc shape, and the protrusion is in a second arc shape.

[0013] Optionally, in some embodiments of the present application, the arc length of the first arc is A, the arc length of the second arc is B, and A is greater than B.

[0014] Optionally, in some embodiments of the present application, the distance between the lowest points of the two oppositely disposed grooves is L1, and the distance between the highest points of the two oppositely disposed protrusions is L2;

[0015] The ratio of L1 to L2 is greater than or equal to 1.5 and less than or equal to 2.

[0016] Optionally, in some embodiments of the present application, the distance between the lowest points of the two grooves disposed opposite to each other is L3, and the distance between the highest points of the two protrusions disposed opposite to each other is L4;

[0017] Wherein, the ratio of L3 to L4 is greater than or equal to 0.5 and less than 1.

[0018] Optionally, in some embodiments of the present application, the stator punching sheet is provided with a through space along the axial direction, the through space is located on a side of the tooth shoulder close to the central axis, and the inner diameter of the through space is D;

[0019] The ratio of D to L3 is greater than or equal to 33 and less than or equal to 50.

[0020] Optionally, in some embodiments of the present application, in a projection plane perpendicular to the central axis, the projection area of ​​the groove is S1, and the projection area of ​​the tooth shoulder is S2; wherein the ratio of S1 to S2 is greater than or equal to 0.025 and less than or equal to 0.125.

[0021] Optionally, in some embodiments of the present application, the radial length of the yoke is greater than the radial length of the tooth portion.

[0022] Optionally, in some embodiments of the present application, the ratio of the radial length of the yoke to the radial length of the tooth portion is greater than or equal to 1.1 and less than or equal to 1.4.

[0023] Optionally, in some embodiments of the present application, the stator punching sheet is formed by stacking multiple non-chip layers in the axial direction;

[0024] The number of the non-chip layers ranges from 3 to 6.

[0025] Optionally, in some embodiments of the present application, the yoke has:

[0026] A plurality of heat dissipation holes axially extending through the yoke;

[0027] Wherein, a plurality of heat dissipation holes are arranged at intervals along the circumferential direction.

[0028] According to a second aspect of the present application, a stator core is provided, comprising a plurality of stator punching sheets as described above.

[0029] Optionally, in some embodiments of the present application, the stator core further includes:

[0030] Two cover plates, a plurality of stator punching sheets are stacked between the two cover plates.

[0031] Optionally, in some embodiments of the present application, the stator punching sheet has:

[0032] A tooth groove is arranged between two adjacent tooth bodies;

[0033] The tooth slots of the plurality of stator punching sheets are arranged correspondingly in the circumferential direction so that the tooth slots of the plurality of stator punching sheets are connected in the axial direction;

[0034] The cover plate has:

[0035] The end slots are arranged corresponding to the tooth slots of the stator punching sheets, so that the end slots and the tooth slots of the plurality of stator punching sheets form a receiving space for embedding the winding.

[0036] Optionally, in some embodiments of the present application, the stator punching sheet has:

[0037] A plurality of heat dissipation holes are arranged at intervals along the circumference;

[0038] Wherein, the heat dissipation holes of a plurality of stator punching sheets in the stator core are connected in the axial direction.

[0039] According to a third aspect of the present application, a stator assembly is also provided, comprising the stator core as described above.

[0040] Optionally, in some embodiments of the present application, the stator assembly includes:

[0041] At least two cover plates are provided, and a plurality of stator cores are stacked between the two cover plates.

[0042] Optionally, in some embodiments of the present application, the stator assembly includes a stator core stacked in multiple layers;

[0043] Wherein, the number of stator cores in the stator assembly ranges from 4 to 6 layers.

[0044] According to a fourth aspect of the present application, a motor is also provided, comprising the stator assembly as described above.

[0045] According to a fifth aspect of the present application, there is also a powertrain, comprising the motor as described above.

[0046] According to a sixth aspect of the present application, a vehicle is also provided, comprising the motor as described above or the powertrain as described above.

[0047] In the stator punching sheets of the embodiment of the present application, on the basis that the stator punching sheets are made of at least amorphous alloy material, by arranging grooves on at least one side of the tooth shoulder in the circumferential direction, the spacing between adjacent tooth shoulders corresponding to the grooves is increased without affecting the overall width of the tooth shoulder, thereby increasing the magnetic resistance between adjacent tooth shoulders, effectively reducing the magnetic field flowing through adjacent tooth shoulders, thereby reducing leakage magnetic flux and improving the problem of local saturation.

[0048] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0050] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0051] Figure 1 is a schematic diagram of the overall structure of a stator punching sheet provided in an exemplary embodiment of the present application;

[0052] Figure 2 is a front view of a stator punching sheet provided in an exemplary embodiment of the present application;

[0053] Figure 3 It is a structural schematic diagram of a portion of a stator punching sheet provided in an exemplary embodiment of the present application;

[0054] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0055] Figure 5 is a schematic structural diagram of a portion of a stator punching sheet provided in an exemplary embodiment of the present application;

[0056] Figure 6 is a schematic structural diagram of a portion of another stator punching sheet provided in an exemplary embodiment of the present application;

[0057] Figure 7is a schematic structural diagram of a portion of a stator punching sheet provided in an exemplary embodiment of the present application;

[0058] Figure 8 is a simulation diagram of the iron loss of the first tooth-to-yoke length ratio provided in an exemplary embodiment of the present application;

[0059] Fig. 9 is an iron loss simulation diagram of a second length ratio of a tooth portion to a yoke portion provided in an exemplary embodiment of the present application;

[0060] Fig.10 is a schematic diagram of the overall structure of a stator core provided in an exemplary embodiment of the present application;

[0061] Fig.11 It is a schematic diagram of the overall structure of a vehicle provided in an exemplary embodiment of the present application.

[0062] Description of reference numerals:

[0063] 100. Stator punching;

[0064] 110, tooth portion; 111, tooth shoulder; 111a, groove; 111b, first shoulder segment; 111c, second shoulder segment; 111d, third shoulder segment; 111e, protrusion; 112, tooth body;

[0065] 100a, tooth groove; 100c, through space;

[0066] 120, yoke; 121, heat dissipation hole;

[0067] C1, central axis;

[0068] 10. Stator core;

[0069] 200, cover plate; 201, end groove; 202, end hole;

[0070] 1. Vehicle. DETAILED DESCRIPTION

[0071] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0072] According to the first aspect of the present application, referring to Figures 1 to 4 The present application provides a stator punching sheet 100 , which is made of at least an amorphous alloy material and includes a yoke 120 and a plurality of teeth 110 .

[0073] The plurality of teeth 110 are spaced apart around a central axis C1 and are respectively connected to the yoke 120 ; the teeth 110 include a tooth body 112 and a tooth shoulder 111 , and the tooth body 112 is connected between the tooth shoulder 111 and the yoke 120 .

[0074] A tooth slot 100a for embedding the winding is formed between adjacent tooth bodies 112; a tooth shoulder 111 is provided at one end of the tooth portion 110, and the tooth shoulder 111 is used to limit the winding embedded in the tooth slot 100a, which requires that the circumferential spacing between adjacent tooth shoulders 111 is smaller than the slot width of the tooth slot 100a.

[0075] For amorphous alloy materials, their saturation magnetic density and relative magnetic permeability are lower, and they are easier to saturate than traditional silicon steel materials.

[0076] In some embodiments, at least a portion of the tooth shoulders 111 are provided with a groove 111 a , and the groove 111 a is provided on at least one side of the tooth shoulder 111 in the circumferential direction.

[0077] It can be understood that the circumferential direction of the present application can be a direction around the central axis C1, and each tooth shoulder 111 in the stator punching sheet 100 is provided with a groove 111a, or the grooves 111a are arranged in a manner of spacing a preset number of tooth shoulders 111, wherein the preset number can be any value from 1 to 9. In the arrangement manner of spacing a preset number of tooth shoulders 111, the grooves 111a on the positioning punching sheet can be evenly spaced in the circumferential direction, or the grooves 111a on the positioning punching sheet can be unevenly spaced in the circumferential direction.

[0078] Furthermore, in order not to affect the overall width of the tooth shoulder 111 in the circumferential direction, the groove 111a is only provided in a partial area of ​​the tooth shoulder 111 in the radial direction. Figure 5 Each tooth shoulder 111 may also be provided with grooves 111a on both sides of the circumferential direction, or, referring to Figure 6 Each tooth shoulder 111 may be provided with a groove 111 a on one side in the circumferential direction.

[0079] The radial direction of the present application may be a direction perpendicular to the central axis C1.

[0080] By adopting the above technical solution, on the basis that the stator punching sheet is made of at least amorphous alloy material, a groove 111a is set on at least one side of the tooth shoulder 111 in the circumferential direction. Under the premise of not affecting the overall width of the tooth shoulder 111 (that is, not affecting the limiting effect on the winding), the distance between the groove 111a and the circumferentially adjacent tooth shoulders 111 is increased, thereby increasing the magnetic resistance between adjacent tooth shoulders 111, effectively reducing the magnetic field flowing through adjacent tooth shoulders 111, thereby reducing leakage magnetic flux and improving the problem of local saturation.

[0081] At the same time, by setting the groove 111a, the magnetic field saturation area can be changed, which has a certain effect on the magnetic field torque pulsation and radial electromagnetic force, which is conducive to maximizing the efficiency advantage of the amorphous motor.

[0082] In some embodiments, reference Figure 4 and Figure 5 The tooth shoulder 111 is provided with grooves 111a on both sides in the circumferential direction. In this way, the two sides of the tooth shoulder 111 and the adjacent tooth shoulders 111 can reduce magnetic leakage.

[0083] In some embodiments, reference Figure 4 The tooth shoulder 111 includes a first shoulder segment 111b and a second shoulder segment 111c connected in the radial direction, the groove 111a is arranged in the second shoulder segment 111c, and the first shoulder segment 111b is located between the second shoulder segment 111c and the tooth portion 110; the first shoulder segment 111b forms protrusions 111e on both sides of the circumferential direction.

[0084] With such a solution, the protrusion 111e on the first shoulder section 111b is provided, which can not only separate the groove 111a from the tooth slot 100a, but also effectively limit the position of the winding embedded in the tooth slot 100a.

[0085] In some embodiments, reference Figure 4 The tooth shoulder 111 includes a third shoulder segment 111d, and the second shoulder segment 111c is located between the first shoulder segment 111b and the third shoulder segment 111d. The third shoulder segment 111d is provided to reduce the influence of the groove 111a on the structural strength of the tooth shoulder 111.

[0086] In some embodiments, the shape of the groove 111 a includes a polygon (such as a triangle, a quadrilateral) and an arc, etc.; the shape of the protrusion 111 e includes a polygon (such as a triangle, a quadrilateral) and an arc, etc.

[0087] In some embodiments, in a projection plane perpendicular to the central axis C1, the groove 111a is in a first arc shape, and the protrusion 111e is in a second arc shape. The arc-shaped design of the groove 111a and the protrusion 111e can reduce magnetic leakage and increase torque compared to other shapes.

[0088] In some embodiments, the arc length of the first arc is A, the arc length of the second arc is B, and A is greater than B. With this solution, by limiting the relationship between the first arc and the second arc, it is ensured that the groove 111a occupies a suitable size on the tooth shoulder 111, and the arrangement of the groove 111a can increase the magnetic resistance.

[0089] In some embodiments, the distance between the lowest points of the two oppositely disposed grooves 111 a is L1, and the distance between the highest points of the two oppositely disposed protrusions 111 e is L2.

[0090] It can be understood that the two grooves 111a are arranged opposite to each other, which means that the openings of the first arcs of the two grooves 111a face the area between the two grooves 111a. The lowest point of the groove 111a can be the point where the first arc of the groove 111a is farthest from the protrusion 111e in the circumferential direction, that is, the distance between the lowest points of the two grooves 111a arranged opposite to each other is the largest. The two protrusions 111e are arranged opposite to each other, which means that the openings of the second arcs of the two protrusions 111e face away from the area between the two protrusions 111e. The highest point of the protrusion 111e can be the point where the second arc of the protrusion 111e is farthest from the groove 111a in the circumferential direction, that is, the distance between the highest points of the two protrusions 111e arranged opposite to each other is the smallest.

[0091] In a specific embodiment of the present application, refer to Figure 5 The lowest points of the two oppositely disposed grooves 111a are E1 and E2, respectively, and the highest points of the two oppositely disposed protrusions 111e are F1 and F2, respectively. That is, L1 is the distance between E1 and E2, and L2 is the distance between F1 and F2.

[0092] The ratio of L1 to L2 is greater than or equal to 1.5 and less than or equal to 2. With such a ratio range, the magnetic resistance between adjacent tooth shoulders 111 is increased while preventing the groove 111 a from being excessively concave and reducing the structural strength of the tooth shoulder 111 itself.

[0093] Optionally, the ratio of L1 to L2 may be one of 1.5 to 1.6, 1.6 to 1.7, 1.7 to 1.8, 1.8 to 1.9, and 1.9 to 2.0.

[0094] Preferably, the ratio of L1 to L2 is 1.7 to 1.8.

[0095] In some embodiments, the distance between the lowest points of the two oppositely disposed grooves 111 a is L3, and the distance between the highest points of the two oppositely disposed protrusions 111 e is L4.

[0096] It can be understood that the two grooves 111a are arranged opposite to each other, which means that the openings of the first arcs of the two grooves 111a face away from the area between the two grooves 111a. The lowest point of the groove 111a can be the point where the first arc of the groove 111a is farthest from the protrusion 111e in the circumferential direction, that is, the distance between the lowest points of the two grooves 111a arranged opposite to each other is the smallest. The two protrusions 111e are arranged opposite to each other, which means that the openings of the second arcs of the two protrusions 111e face the area between the two protrusions 111e. The highest point of the protrusion 111e can be the point where the second arc of the protrusion 111e is farthest from the groove 111a in the circumferential direction, that is, the distance between the highest points of the two protrusions 111e arranged opposite to each other is the largest.

[0097] In a specific embodiment of the present application, refer to Figure 5 The lowest points of the two oppositely disposed grooves 111a are E1 and E3, respectively, and the highest points of the two oppositely disposed protrusions 111e are F1 and F3, respectively. That is, L3 is the distance between E1 and E3, and L4 is the distance between F1 and F3.

[0098] The ratio of L3 to L4 is greater than or equal to 0.5 and less than 1. With such a ratio range, the tooth shoulders 111 adjacent to each other in the circumferential direction can reduce magnetic leakage while ensuring that the tooth shoulders 111 themselves have sufficient rigidity.

[0099] Optionally, the ratio of L3 to L4 may be one of 0.5 to 0.6, 0.6 to 0.7, 0.7 to 0.8, 0.8 to 0.9, greater than or equal to 0.9 and less than 1.0.

[0100] Preferably, the ratio of L3 to L4 is 0.7 to 0.8.

[0101] In some embodiments, the stator sheet 100 is provided with a through space 100c along the axial direction, the through space 100c is located on the side of the tooth shoulder 111 close to the central axis C1, and the through space 100c is used for subsequent installation of the rotor. The inner diameter of the through space 100c is D; wherein the ratio of D to L3 is greater than or equal to 33 and less than or equal to 50.

[0102] The axial direction in the present application may be the extension direction of the central axis C1.

[0103] By adopting such a solution, both sides of the tooth shoulder 111 and the adjacent tooth shoulders 111 can reduce magnetic leakage while ensuring the stability of the stator punching sheet 100 and optimizing the magnetic field distribution.

[0104] Optionally, the ratio of D to L3 can be one of 33 to 36, 36 to 40, 40 to 44, 44 to 47, and 47 to 50.

[0105] Preferably, the ratio of D to L3 is 40 to 44.

[0106] In some embodiments, reference Figure 7 In the projection plane perpendicular to the central axis, the projection area of ​​the groove 111a is S1, and the projection area of ​​the tooth shoulder 111 is S2; wherein the ratio of S1 to S2 is greater than or equal to 0.025 and less than or equal to 0.125.

[0107] To facilitate understanding of the area occupied by the groove 111a and the tooth shoulder 111, refer to Figure 7 , the groove 111a and the tooth shoulder 111 are represented by different filling patterns, but it does not constitute a limitation to the present application.

[0108] By adopting such a solution, a sufficient isolation effect is maintained between two adjacent tooth shoulders 111 to reduce magnetic leakage while ensuring that the tooth shoulders 111 have sufficient rigidity to limit the winding.

[0109] As a preferred solution, the ratio of S1 to S2 is greater than or equal to 0.026 and less than or equal to 0.125.

[0110] In some embodiments, reference Figures 1 to 3 , the length of the yoke portion 120 in the radial direction is greater than the length of the tooth portion 110 in the radial direction.

[0111] By adopting such a solution, the low magnetic permeability problem of amorphous alloy materials is improved by increasing the length of the yoke 120 and reducing the length of the tooth 110, and saturation suppression is achieved. Figure 8 and Fig. 9 , Figure 8 The length of the middle tooth portion 110 is greater than the length of the yoke portion 120. Fig. 9 The length of the middle tooth part 110 is smaller than the length of the yoke part 120. It can be seen that Figure 8 The present application can avoid local oversaturation, thereby reducing iron loss; at the same time, increasing the length of the yoke 120 can improve the rigidity of the stator punching sheet 100 and reduce the risk of vibration and noise caused by the low elastic modulus of the amorphous alloy material.

[0112] In some embodiments, a ratio of a radial length of the yoke 120 to a radial length of the tooth 110 is greater than or equal to 1.1 and less than or equal to 1.4.

[0113] Under such a ratio, it can be ensured that the stator punching sheet 100 containing amorphous alloy materials in the present application will not be locally oversaturated. Through finite element calculation, when the amorphous motor works at the rated working point, the maximum magnetic density of the yoke 120 is less than or equal to 1.5T, and the magnetic density of the tooth 110 is less than or equal to 1.7T; when the amorphous motor works at the maximum torque working point, the maximum magnetic density of the yoke 120 is less than or equal to 1.7T, and the maximum magnetic density of the tooth 110 is less than or equal to 1.8T, thereby avoiding local oversaturation and maximizing the efficiency advantage of the amorphous motor.

[0114] In some embodiments, the stator sheet 100 is formed by stacking and solidifying multiple non-wafer layers in the axial direction.

[0115] When the number of non-chip layers is too large, the hardness of the stator punching sheet 100 is high, resulting in a short mold life. When the number of non-chip layers is too small, the thickness of the stator punching sheet 100 is thin, resulting in a long processing time. Therefore, the number of non-chip layers ranges from 3 to 6.

[0116] By adopting such a scheme, the processing efficiency can be improved by optimizing the number of amorphous crystal layers in the stator punching sheet 100, considering that the high strength of amorphous alloy materials may lead to a short life of the dedicated mold, and the low thickness of the stator punching sheet 100 may lead to a long processing time.

[0117] In some embodiments, reference Figures 1 to 3 The yoke 120 has: a plurality of heat dissipation holes 121. The plurality of heat dissipation holes 121 are arranged at intervals along the circumferential direction, and the heat dissipation holes 121 axially penetrate the yoke 120. The heat dissipation holes 121 are arranged to transmit cooling medium, which is beneficial to the heat dissipation of the stator assembly or motor manufactured subsequently.

[0118] According to the second aspect of the present application, referring to Fig.10 , a stator core 10 is provided, and the stator core 10 includes a plurality of the above-mentioned stator punching sheets 100. The stator core 10 has all the beneficial effects of the above-mentioned stator punching sheets 100, and the present application will not repeat them here.

[0119] In some embodiments, reference Fig.10 The stator core 10 further includes: a cover plate 200. Two cover plates 200 are provided, and a plurality of stator punching sheets 100 are stacked between the two cover plates 200 to protect the stator punching sheets 100, improve the phenomenon of easy edge warping caused by low peeling strength of amorphous alloy materials, and improve the process of inserting the hairpin coil during stator assembly, which may cause the insulation paint film of the hairpin coil to be damaged due to the high hardness of the amorphous stator punching sheets 100.

[0120] Specifically, multiple stator punching sheets 100 are bonded into a whole by glue, and the cover plate 200 is only in contact with the stator punching sheets 100 at the ends of the whole, and is bonded and fixed by glue. By bonding and fixing with glue instead of screws, the problem of insufficient heat dissipation in the axial direction of the stator and damage to the insulating paint film can be reduced to a great extent.

[0121] Optionally, the cover plate 200 includes metal materials such as silicon steel sheet and stainless steel.

[0122] In some embodiments, reference Fig.10 The tooth slots 100 a of the plurality of stator punching sheets 100 are correspondingly arranged in the circumferential direction so that the tooth slots 100 a of the plurality of stator punching sheets 100 are connected in the axial direction.

[0123] The cover plate 200 has an end slot 201. The end slot 201 is arranged corresponding to the tooth slot 100a of the stator punching sheet 100, so that the end slot 201 and the tooth slots 100a of the plurality of stator punching sheets 100 form a receiving space for embedding the winding.

[0124] In some embodiments, the teeth 110 of the plurality of stator sheets 100 are arranged correspondingly in the circumferential direction so that the grooves 111a of the plurality of stator sheets 100 are connected in the axial direction. That is, at the same circumferential position, the teeth 110 of the stator sheets 100 have the same structure, so as to avoid magnetic leakage from the tooth shoulders 111 of the stator sheets 100 of different layers.

[0125] In some embodiments, the number of the stator punching sheets 100 stacked in the stator core 10 ranges from 100 to 300. Such a stacking number is beneficial to the processing of the stator core 10.

[0126] In some embodiments, reference Fig.10 The stator sheet 100 has: a plurality of heat dissipation holes 121. The plurality of heat dissipation holes 121 are arranged at intervals along the circumferential direction, and the heat dissipation holes 121 of the plurality of stator sheets 100 are connected in the axial direction. Accordingly, the cover plate 200 is provided with end holes 202 corresponding to the heat dissipation holes 121.

[0127] According to a third aspect of the present application, a stator assembly is provided, the stator assembly comprising the above-mentioned stator core 10. The stator assembly has all the beneficial effects of the above-mentioned stator core 10, which will not be described in detail in the present application.

[0128] In some embodiments, the stator assembly includes: at least two cover plates 200. A plurality of stator cores 10 are stacked between the two cover plates 200.

[0129] It can be understood that the stator assembly can be provided with only two cover plates 200, and the two cover plates 200 are respectively located at the ends of the stator assembly; or, a cover plate 200 is respectively provided at the end of each stator core 10 in the stator assembly, wherein two axially adjacent stator cores 10 can share a cover plate 200; or, a cover plate 200 can be provided between multiple stator cores. Of course, the arrangement of the cover plate can also adopt a combination of the above methods.

[0130] In some embodiments, the stator assembly includes a stator core 10 that is stacked in multiple layers.

[0131] Due to the material properties of amorphous alloy materials, stator components made therefrom are generally processed by wire cutting. When the number of layers of the stator core 10 is too large, the processing time of the wire cutting stator component is likely to be prolonged; when the number of layers of the stator core 10 is too small, the stator core 10 is likely to have wavy lines. Therefore, the number of stator cores 10 in the stator component ranges from 4 to 6 layers, so that the processing efficiency can be improved while ensuring the processing quality.

[0132] According to a fourth aspect of the present application, a motor is provided, the motor comprising the above-mentioned stator assembly. The motor has all the beneficial effects of the above-mentioned stator assembly, which will not be described in detail in the present application.

[0133] According to a fifth aspect of the present application, a power assembly is provided, the power assembly comprising the above-mentioned motor. The power assembly has all the beneficial effects of the above-mentioned motor, and the present application will not repeat them here.

[0134] According to the sixth aspect of the present application, referring to Fig.11 , a vehicle 1 is provided, which includes the above-mentioned motor and power assembly. The vehicle 1 has all the beneficial effects of the above-mentioned motor or power assembly, and this application will not repeat them here.

[0135] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0136] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0137] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0138] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0139] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A stator punching sheet, characterized in that: The stator punching sheet is at least made of an amorphous alloy material, and the stator punching sheet comprises: yoke; A plurality of teeth are arranged at intervals around a central axis, and the plurality of teeth are respectively connected to the yoke; Wherein, the tooth portion comprises a tooth body and a tooth shoulder, and the tooth body is connected between the tooth shoulder and the yoke portion; At least a portion of the tooth shoulders are provided with grooves, and the grooves are provided on at least one side of the tooth shoulders in the circumferential direction.

2. The stator sheet according to claim 1, characterized in that: The grooves are arranged on both sides of the tooth shoulder in the circumferential direction.

3. The stator sheet according to claim 2, characterized in that: The tooth shoulder includes a first shoulder segment and a second shoulder segment connected in the radial direction, the groove is arranged in the second shoulder segment, and the first shoulder segment is located between the second shoulder segment and the tooth portion; the first shoulder segment forms protrusions on both sides of the circumferential direction.

4. The stator sheet according to claim 3, characterized in that: In a projection plane perpendicular to the central axis, the groove is in a first arc shape, and the protrusion is in a second arc shape.

5. The stator sheet according to claim 4, characterized in that: The arc length of the first arc is A, the arc length of the second arc is B, and A is greater than B.

6. The stator sheet according to claim 3, characterized in that: The distance between the lowest points of the two oppositely disposed grooves is L1, and the distance between the highest points of the two oppositely disposed protrusions is L2; The ratio of L1 to L2 is greater than or equal to 1.5 and less than or equal to 2.

7. The stator sheet according to claim 3, characterized in that: The distance between the lowest points of the two grooves disposed opposite to each other is L3, and the distance between the highest points of the two protrusions disposed opposite to each other is L4; Wherein, the ratio of L3 to L4 is greater than or equal to 0.5 and less than 1.

8. The stator sheet according to claim 7, characterized in that: The stator punching sheet is provided with a through space along the axial direction, the through space is located on the side of the tooth shoulder close to the central axis, and the inner diameter of the through space is D; The ratio of D to L3 is greater than or equal to 33 and less than or equal to 50.

9. The stator sheet according to claim 1, characterized in that: In a projection plane perpendicular to the central axis, the projection area of ​​the groove is S1, and the projection area of ​​the tooth shoulder is S2; wherein the ratio of S1 to S2 is greater than or equal to 0.025 and less than or equal to 0.

125.

10. The stator sheet according to any one of claims 1 to 9, characterized in that: A radial length of the yoke portion is greater than a radial length of the tooth portion.

11. The stator sheet according to claim 10, characterized in that: A ratio of a radial length of the yoke portion to a radial length of the tooth portion is greater than or equal to 1.1 and less than or equal to 1.

4.

12. The stator sheet according to any one of claims 1 to 9, characterized in that: The stator punching sheet is formed by stacking multiple non-chip layers in the axial direction; The number of the non-chip layers ranges from 3 to 6.

13. The stator sheet according to any one of claims 1 to 9, characterized in that: The yoke has: A plurality of heat dissipation holes axially extending through the yoke; Wherein, a plurality of heat dissipation holes are arranged at intervals along the circumferential direction.

14. A stator core, characterized in that: The invention comprises a plurality of stator sheets according to any one of claims 1 to 13.

15. The stator core according to claim 14, characterized in that: The stator core further comprises: Two cover plates, a plurality of stator punching sheets are stacked between the two cover plates.

16. The stator core according to claim 15, characterized in that: The stator punching sheet has: A tooth groove is arranged between two adjacent tooth bodies; The tooth slots of the plurality of stator punching sheets are arranged correspondingly in the circumferential direction so that the tooth slots of the plurality of stator punching sheets are connected in the axial direction; The cover plate has: The end slots are arranged corresponding to the tooth slots of the stator punching sheets, so that the end slots and the tooth slots of the plurality of stator punching sheets form a receiving space for embedding the winding.

17. The stator core according to claim 14, characterized in that: The stator punching sheet has: A plurality of heat dissipation holes are arranged at intervals along the circumference; Wherein, the heat dissipation holes of a plurality of stator punching sheets in the stator core are connected in the axial direction.

18. A stator assembly, characterized in that: Comprising the stator core according to any one of claims 14 to 17.

19. The stator assembly according to claim 18, characterized in that The stator assembly comprises: At least two cover plates are provided, and a plurality of stator cores are stacked between the two cover plates.

20. The stator assembly according to claim 18, characterized in that The stator assembly includes a stator core stacked in multiple layers; Wherein, the number of stator cores in the stator assembly ranges from 4 to 6 layers.

21. A motor, characterized in that: A stator assembly comprising any one of claims 18 to 20.

22. A powertrain, characterized in that: Including the motor as claimed in claim 21.

23. A vehicle, characterized in that: Comprising the motor as claimed in claim 21 or the powertrain as claimed in claim 22.

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