Motor stator assembly and motor

Abstract

The invention provides a motor stator assembly and a motor, and the motor stator assembly comprises a stator core, and a plurality of stator teeth are uniformly distributed in the circumferential direction of the stator core; the confluence assembly is connected to the end part of the stator iron core through an insulating bracket, the confluence assembly comprises a plurality of busbars, and at least two busbars in the plurality of busbars are distributed at intervals along the radial direction of the stator iron core; the star point ring is connected to the end part of the stator iron core through an insulating bracket, and the star point ring is arranged close to the inner ring of the stator iron core; and the stator winding is provided with a plurality of flat wire coils, the flat wire coils and the stator teeth are arranged in a one-to-one correspondence manner, one end of each flat wire coil is connected with the star point ring, and the other end of each flat wire coil is correspondingly connected with the busbar. In the scheme, the end part of the flat wire coil does not need to extend outwards along the axial direction of the stator core, and is connected with the star point ring and the busbar through a short path, so that the end part height of the flat wire coil is reduced, the axial size of the motor is reduced, and the power density of the motor is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular, to a motor stator assembly and a motor. Background Art

[0002] In the field of electric aviation, as one of the key power sources, the performance of permanent magnet motors, especially the power density and reliability, is directly related to the efficiency and safety of aircraft. At present, high-power density outer rotor double three-phase permanent magnet motors mostly adopt flat wire windings to improve the slot fill factor and reduce AC losses.

[0003] In the traditional flat wire winding design, the end welding of the flat wire winding usually adopts a multi-layer stacking method, which significantly increases the height of the winding end, resulting in an increase in the axial size of the motor, thereby affecting the power density of the motor.

[0004] Aiming at the problem that the end welding method of the flat wire winding in the prior art leads to a low power density of the motor, no effective solution has been proposed yet. Summary of the Invention

[0005] The main object of the present invention is to provide a motor stator assembly and a motor to solve the problem that the end welding method of the flat wire winding in the prior art leads to a low power density of the motor.

[0006] To achieve the above object, according to one aspect of the present invention, a motor stator assembly is provided, including: a stator core, on which a plurality of stator teeth are circumferentially and evenly distributed; a busbar assembly, which is connected to the end of the stator core through an insulating bracket, the busbar assembly includes a plurality of busbars, and at least two of the plurality of busbars are distributed at intervals in the radial direction of the stator core; a star point ring, which is connected to the end of the stator core through an insulating bracket, and the star point ring is arranged close to the inner circle of the stator core; a stator winding, which has a plurality of flat wire coils, the flat wire coils are arranged in one-to-one correspondence with the stator teeth, one end of the flat wire coil is connected to the star point ring, and the other end of the flat wire coil is correspondingly connected to the busbar.

[0007] Further, the stator winding includes a plurality of winding modules, the plurality of winding modules are connected in parallel, there are a plurality of busbar assemblies, the busbar assemblies are arranged in one-to-one correspondence with the winding modules, and at least two of the plurality of busbar assemblies are distributed at intervals in the circumferential direction of the stator core.

[0008] Further, some of the flat wire coils include: a coil body; a first connecting portion, which extends along the axial direction of the stator core, one end of the first connecting portion is connected to the coil body, and the other end of the first connecting portion is connected to the star point ring; a second connecting portion, which is bent along the circumferential direction of the stator core, one end of the second connecting portion is connected to the coil body, and the other end of the second connecting portion is connected to the busbar.

[0009] Further, the insulating bracket includes: a first bracket, the first bracket being of an annular structure, the first bracket being connected to the end of the stator core, the first bracket being provided with a plurality of supporting portions, the plurality of supporting portions being circumferentially spaced apart along the first bracket, the busbars being connected between at least two of the supporting portions, and the star point ring being connected between at least two of the supporting portions.

[0010] Further, a plurality of slots are provided on each of the supporting portions, the plurality of slots being radially spaced apart along the first bracket, and the busbars are inserted into the slots.

[0011] Further, there are two star point rings, the two star point rings being axially spaced apart along the stator core, and the insulating bracket further includes: a second bracket, the second bracket being of an annular structure, a part of the second bracket being connected to the first bracket, the second bracket being provided with an annular groove, one star point ring being inserted into the slot, and the other star point ring being inserted into the annular groove.

[0012] Further, a convex block is provided at one end of the second bracket close to the first bracket, and the second bracket is inserted into the slot through the convex block.

[0013] Further, one end of the stator tooth is connected to the yoke portion of the stator core, and a pole shoe is provided at the other end of the stator tooth, the pole shoe being detachably connected to the stator tooth, wherein the pole shoe is made of cobalt iron alloy.

[0014] Further, the length of the flat wire coil is less than the length of the stator tooth, so as to form a spaced space between the pole shoe and the flat wire coil.

[0015] According to another aspect of the present invention, a motor is provided, the motor including a motor stator assembly, and the motor stator assembly being the above-mentioned motor stator assembly.

[0016] Applying the technical solution of the present invention, at least two of the plurality of busbars are radially spaced apart along the stator core, so that the plurality of busbars are distributed at the same axial height, avoiding the stacked arrangement of the plurality of busbars in the axial direction of the stator core; the star point ring is arranged close to the inner circle of the stator core, so that the star point ring and the busbars are spaced apart in the radial direction of the stator core, avoiding the stacked arrangement of the star point ring and the busbars in the axial direction of the stator core, and enabling the star point ring and the busbars to be distributed at the same axial height; one end of all the flat wire coils can be connected to the star point ring without extending outward, and the other end of some of the flat wire coils only needs to extend circumferentially to be connected to the corresponding busbars. In the above solution, the end of the flat wire coil does not need to extend axially outward along the stator core, and is connected to the star point ring and the busbars through a short path, reducing the end height of the flat wire coil, reducing the axial dimension of the motor, and thereby improving the power density of the motor. Description of the Drawings

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 Shows a schematic structural diagram of the motor stator assembly in the present invention;

[0019] Figure 2 Shows a partial cross-sectional view of the motor stator assembly in the present invention;

[0020] Figure 3 Shows a schematic connection diagram of the flat wire coil and the busbar in the present invention;

[0021] Figure 4 Shows a schematic structural diagram of the flat wire coil in the present invention;

[0022] Figure 5 Shows a schematic structural diagram of the first bracket in the present invention;

[0023] Figure 6 Shows a schematic structural diagram of the second bracket in the present invention;

[0024] Figure 7 Shows a partial cross-sectional view of the second bracket in the present invention;

[0025] Figure 8 Shows a schematic structural diagram of the busbar in the present invention;

[0026] Figure 9 Shows a schematic structural diagram of the star point ring in the present invention;

[0027] Figure 10 Shows a schematic positional relationship diagram among the flat wire coil, the pole shoe, and the stator tooth in the present invention;

[0028] Figure 11 Shows a schematic distribution diagram of the stator winding in the present invention.

[0029] Among them, the above-mentioned drawings include the following reference numerals:

[0030] 10. Stator core;

[0031] 11. Stator tooth;

[0032] 20. Busbar assembly;

[0033] 21. Busbar; 211. First docking part; 212. Wiring terminal;

[0034] 30. Star point ring;

[0035] 31. Second docking part;

[0036] 40. Stator winding;

[0037] 41. Flat wire coil;

[0038] 411. Coil body; 412. First connecting part; 413. Second connecting part;

[0039] 50. Insulating bracket;

[0040] 51. First bracket;

[0041] 511. Supporting part; 512. Slot; 513. Annular protrusion;

[0042] 52. Second bracket;

[0043] 521. Annular groove; 522. Protrusion; 523. Baffle edge; 524. Stopper;

[0044] 60. Pole shoe;

[0045] 70. Spacing space. Detailed implementation manners

[0046] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0047] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the implementation manners of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0049] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0050] Combined with Figures 1 to 11 As shown, according to a specific embodiment of the present application, a motor stator assembly is provided.

[0051] Specifically, the motor stator assembly includes: a stator core 10, a busbar assembly 20, a star point ring 30, and a stator winding 40. A plurality of stator teeth 11 are circumferentially and uniformly distributed on the stator core 10. The busbar assembly 20 is connected to the end of the stator core 10 through an insulating bracket 50. The busbar assembly 20 includes a plurality of busbars 21. At least two of the plurality of busbars 21 are spaced apart in the radial direction of the stator core 10. The star point ring 30 is connected to the end of the stator core 10 through an insulating bracket 50, and the star point ring 30 is disposed close to the inner circle of the stator core 10. The stator winding 40 has a plurality of flat wire coils 41. The flat wire coils 41 are arranged in one-to-one correspondence with the stator teeth 11. One end of the flat wire coil 41 is connected to the star point ring 30, and the other end of the flat wire coil 41 is correspondingly connected to the busbar 21.

[0052] In the embodiment of the present application, at least two of the plurality of busbars 21 are spaced apart in the radial direction of the stator core 10 so that the plurality of busbars 21 are distributed at the same axial height, avoiding the stacked arrangement of the plurality of busbars 21 in the axial direction of the stator core 10; the star point ring 30 is disposed close to the inner circle of the stator core 10 so that the star point ring 30 and the busbar 21 are spaced apart in the radial direction of the stator core 10, avoiding the stacked arrangement of the star point ring 30 and the busbar 21 in the axial direction of the stator core 10, and enabling the star point ring 30 and the busbar 21 to be distributed at the same axial height; one end of all the flat wire coils 41 can be connected to the star point ring 30 without extending outward, and the other end of some of the flat wire coils 41 only needs to extend circumferentially to be connected to the corresponding busbar 21. In the above solution, the end of the flat wire coil 41 does not need to extend axially outward from the stator core 10 and is connected to the star point ring 30 and the busbar 21 through a short path, reducing the end height of the flat wire coil 41, reducing the axial dimension of the motor, and thereby improving the power density of the motor.

[0053] In an exemplary embodiment of the present application, the stator winding 40 includes a plurality of winding modules, the plurality of winding modules are arranged in parallel, there are a plurality of busbar assemblies 20, the busbar assemblies 20 are arranged in one-to-one correspondence with the winding modules, and at least two of the plurality of busbar assemblies 20 are circumferentially spaced apart along the stator core 10.

[0054] In the embodiment of the present application, at least two of the plurality of busbar assemblies 20 are circumferentially spaced apart along the stator core 10, so that the connection ends of at least some of the flat wire coils 41 are circumferentially spaced apart along the stator core 10, reducing the stacking layers of the connection ends of the flat wire coils 41 in the radial direction of the stator core 10, reducing the end size of the stator winding 40, further reducing the volume of the motor, and increasing the power density of the motor. Reducing the stacking layers of the connection ends of the flat wire coils 41 in the radial direction of the stator core 10 is beneficial to the heat dissipation of the stator winding 40, reducing the risk of local overheating, and improving the heat dissipation efficiency and operation stability of the motor. In addition, at least two of the plurality of busbar assemblies 20 are circumferentially spaced apart along the stator core 10, which can reduce the mutual coupling of electromagnetic fields, enhance the electromagnetic compatibility of the motor, reduce the electromagnetic interference to peripheral devices, and also reduce the performance degradation caused by electromagnetic interference.

[0055] As Figure 1 、 Figure 2 、 Figure 11 shown, the motor in the figure is a dual three-phase motor. The stator winding 40 of the dual three-phase motor includes three winding modules, namely an A-phase winding module, a B-phase winding module, and a C-phase winding module. The A-phase winding module, the B-phase winding module, and the C-phase winding module are arranged in parallel. The A-phase winding module includes A1 winding and A2 winding arranged in parallel. The B-phase winding module includes B1 winding and B2 winding arranged in parallel. The C-phase winding module includes C1 winding and C2 winding arranged in parallel.

[0056] As Figure 1 、 Figure 2 shown, the busbar assemblies 20 connected to the A-phase winding module, the busbar assemblies 20 connected to the B-phase winding module, and the busbar assemblies 20 connected to the C-phase winding module are circumferentially spaced apart along the stator core 10. Among them, the circumferential spacing distribution means that the centers of the respective busbar assemblies 20 are circumferentially spaced apart along the stator core 10, that is, the projections of the respective busbar assemblies 20 in the radial direction of the stator core 10 are allowed to overlap. The busbars 21 connected to the A1 winding and the busbars 21 connected to the A2 winding are radially spaced apart along the stator core 10. The busbars 21 connected to the B1 winding and the busbars 21 connected to the B2 winding are radially spaced apart along the stator core 10. The busbars 21 connected to the C1 winding and the busbars 21 connected to the C2 winding are radially spaced apart along the stator core 10.

[0057] ​Further, part of the flat wire coil 41 includes: a coil body 411, a first connection portion 412, and a second connection portion 413. The first connection portion 412 extends along the axial direction of the stator core 10. One end of the first connection portion 412 is connected to the coil body 411, and the other end of the first connection portion 412 is connected to the star point ring 30. The second connection portion 413 is bent along the circumferential direction of the stator core 10. One end of the second connection portion 413 is connected to the coil body 411, and the other end of the second connection portion 413 is connected to the bus bar 21.

[0058] In an embodiment of the present application, the first connection portion 412 extends along the axial direction of the stator core 10 to be connected to the second docking portion 31 on the star point ring 30; a plurality of flat wire coils 41 connected to the same bus bar 21 are evenly distributed along the circumferential direction of the stator core 10. Some of the plurality of flat wire coils 41 are disposed opposite to the bus bar 21, and some of the other flat wire coils 41 among the plurality of flat wire coils 41 are disposed offset from the bus bar 21. The second connection portion 413 is bent along the circumferential direction of the stator core 10 to be connected to the bus bar 21.

[0059] As Figure 9 shown, a plurality of second docking portions 31 are provided in the circumferential direction of the star point ring 30, and the interval distance between two adjacent second docking portions 31 is set according to the distribution of the flat wire coils 41.

[0060] As Figure 3 、 Figure 4 、 Figure 8 shown, taking the A1 winding as an example, the connection between the A1 winding and the bus bar 21 is described. The A1 winding includes six flat wire coils 41, among which three flat wire coils 41 are disposed opposite to the bus bar 21 in the circumferential direction of the stator core 10, and the other three flat wire coils 41 are disposed offset from the bus bar 21 in the circumferential direction of the stator core 10. The connection portion of the flat wire coil 41 opposite to the bus bar 21 can be directly connected to the bus bar 21, and the flat wire coil 41 offset from the bus bar 21 is connected to the bus bar 21 through the second connection portion 413. Since the interval distances between each flat wire coil 41 and the bus bar 21 are different, the bending lengths of the second connection portions 413 on each flat wire coil 41 are different. Among them, in order to avoid crossing between each flat wire coil 41, the bending heights of the second connection portions 413 of each flat wire coil 41 are different.

[0061] As Figure 8As shown, the bus bar 21 is an arc structure to fit the stator core 10. A plurality of first docking parts 211 are provided on the bus bar 21, and the bus bar 21 is connected to the flat wire coil 41 through the first docking parts 211. Among them, the length of the first docking part 211 is designed according to the connection position of the flat wire coil 41, so the lengths of the plurality of first docking parts 211 are not exactly the same. Among them, a wiring terminal 212 is provided in the middle of the bus bar 21, and the wiring terminal 212 is used as the lead-out end of the flat wire coil 41 to be connected to external equipment.

[0062] In an exemplary embodiment of the present application, the insulating bracket 50 includes: a first bracket 51, the first bracket 51 is a ring structure, the first bracket 51 is connected to the end of the stator core 10, a plurality of carrying parts 511 are provided on the first bracket 51, the plurality of carrying parts 511 are distributed at intervals along the circumference of the first bracket 51, the bus bar 21 is connected between at least two carrying parts 511, and the star point ring 30 is connected between at least two carrying parts 511.

[0063] In the embodiment of the present application, a plurality of carrying parts 511 are circumferentially distributed on the annular first bracket 51. The carrying parts 511 provide installation positions for the bus bar 21 and the star point ring 30, so that the bus bar 21 and the star point ring 30 are distributed along the radial direction of the stator core 10. Furthermore, the end of the flat wire coil 41 does not need to extend axially outward along the stator core 10. Only the end of a part of the flat wire coil 41 extends circumferentially to realize the connection with the bus bar 21, reducing the end height of the flat wire coil 41, reducing the axial dimension of the motor, and thus improving the power density of the motor.

[0064] As Figure 2 、 Figure 5 shown, the first bracket 51 is made of insulating material. An annular protrusion 513 is provided at the first end of the first bracket 51. The annular protrusion 513 is arranged close to the inner ring of the first bracket 51. An annular groove is provided in the inner ring of the lead-out end of the stator core 10. The first bracket 51 is connected to the stator core 10 through the cooperation of the annular protrusion 513 and the annular groove of the stator core 10. A plurality of protruding parts are provided at the second end of the first bracket 51. The plurality of protruding parts are arranged at intervals along the circumference of the first bracket 51. The plurality of carrying parts 511 are arranged in one-to-one correspondence with the plurality of protruding parts. The carrying part 511 is connected to the outer wall of the protruding part.

[0065] Preferably, as Figure 5 shown, a plurality of slots 512 are provided on each carrying part 511. The plurality of slots 512 are distributed at intervals along the radial direction of the first bracket 51. The bus bar 21 is inserted into the slots 512. The slots 512 play a role in positioning and limiting to prevent the bus bar 21 from shifting.

[0066] In an exemplary embodiment of the present application, there are two star point rings 30, and the two star point rings 30 are distributed at intervals along the axial direction of the stator core 10. The insulating bracket 50 further includes: a second bracket 52. The second bracket 52 is of an annular structure. A part of the second bracket 52 is connected to the first bracket 51. The second bracket 52 is provided with an annular groove 521. One star point ring 30 is inserted into the slot 512, and the other star point ring 30 is inserted into the annular groove 521.

[0067] In the embodiment of the present application, the setting of the second bracket 52 enables the two star point rings 30 to be distributed at intervals along the axial direction of the stator core 10. Furthermore, both of the two star point rings 30 are arranged close to the inner circle of the stator core 10. One end of the flat wire coil 41 connected to the star point ring 30 can be connected to the star point ring 30 without special design, thus simplifying the processing technology.

[0068] As Figure 2 、 Figure 6 、 Figure 7 shown, an annular rib 523 is provided on the outer circle of the second bracket 52, and a plurality of stoppers 524 are provided on the inner circle of the second bracket 52. The plurality of stoppers 524 are arranged at intervals along the circumferential direction of the second bracket 52. An annular groove 521 is formed between the stopper 524 and the rib 523.

[0069] Furthermore, a convex block 522 is provided at one end of the second bracket 52 close to the first bracket 51. The second bracket 52 is inserted into the slot 512 through the convex block 522. The setting of the convex block 522 facilitates the positioning connection between the second bracket 52 and the first bracket 51.

[0070] As Figure 2 、 Figure 7 shown, there are a plurality of such convex blocks 522, and the plurality of convex blocks 522 correspond to the plurality of supporting parts 511 one by one to realize the corresponding insertion connection between the convex block 522 and the supporting part 511.

[0071] In an exemplary embodiment of the present application, one end of the stator tooth 11 is connected to the yoke part of the stator core 10, and a pole shoe 60 is provided at the other end of the stator tooth 11. The pole shoe 60 is detachably connected to the stator tooth 11. Among them, the pole shoe 60 is made of cobalt iron alloy.

[0072] In the embodiment of the present application, the detachable connection between the pole shoe 60 and the stator tooth 11 facilitates sleeving the flat wire coil 41 on the stator tooth 11. The design of the pole shoe 60 can effectively improve the magnetic field distribution of the motor and reduce the harmonic content. Cobalt iron alloy has the characteristic of high magnetic permeability. Compared with the traditional silicon steel material, it can effectively suppress the AC loss of the winding and alleviate the edge effect.

[0073] As Figure 10As shown, a dovetail protrusion is provided at one end of the stator tooth 11 away from the yoke of the stator core 10, and a dovetail groove is provided on the pole shoe 60. The pole shoe 60 is inserted and fitted with the dovetail protrusion through the dovetail groove. Among them, the pole shoe 60 is formed by stacking 0.1 mm cobalt-iron alloy.

[0074] Furthermore, the length of the flat wire coil 41 is less than the length of the stator tooth 11, so as to form a spacer space 70 between the pole shoe 60 and the flat wire coil 41.

[0075] In the embodiment of the present application, the length of the flat wire coil 41 is less than the length of the stator tooth 11, which increases the air gap between the flat wire coil 41 and the pole shoe 60, can reduce the influence of the air gap magnetic field on the winding, especially the eddy current effect under high-frequency conditions, helps to reduce the AC copper loss of the winding, and improves the overall efficiency of the motor.

[0076] As Figure 10 shown, the distance between the pole shoe 60 and the flat wire coil 41 is L1, and the length of the stator tooth 11 is L2, and L1≥0.1L2.

[0077] The motor stator assembly in the present application can be a 12-slot 10-pole, 12-slot 14-pole, and related multiple motor stator assemblies.

[0078] In an exemplary embodiment of the present application, a 36-slot 30-pole double-three-phase motor stator assembly is taken as an example for description, and its winding distribution diagram is as Figure 11 shown. The two independent three-phase windings are spatially offset by 30° electrical angle, and at the same time, the two windings adopt an independent star point setting. This design can still provide 50% - 60% of the power when one winding fails, meeting the high-reliability requirements of aviation products.

[0079] The stator winding 40 of the double-three-phase motor stator assembly includes three winding modules, namely an A-phase winding module, a B-phase winding module, and a C-phase winding module. The A-phase winding module, the B-phase winding module, and the C-phase winding module are connected in parallel. The A-phase winding module includes an A1 winding and an A2 winding connected in parallel. The B-phase winding module includes a B1 winding and a B2 winding connected in parallel. The C-phase winding module includes a C1 winding and a C2 winding connected in parallel.

[0080] As Figure 11As shown, the A1 winding has a total of six rectangular wire coils 41. The first coil of the A1 winding is sleeved on the stator tooth 11 between slot 1 and slot 2. The second coil of the A1 winding is sleeved on the stator tooth 11 between slot 7 and slot 8. The third coil of the A1 winding is sleeved on the stator tooth 11 between slot 13 and slot 14. The fourth coil of the A1 winding is sleeved on the stator tooth 11 between slot 19 and slot 20. The fifth coil of the A1 winding is sleeved on the stator tooth 11 between slot 25 and slot 26. The sixth coil of the A1 winding is sleeved on the stator tooth 11 between slot 32 and slot 32.

[0081] As Figure 11 shown, the A2 winding has a total of six rectangular wire coils 41. The first coil of the A2 winding is sleeved on the stator tooth 11 between slot 1 and slot 36. The second coil of the A2 winding is sleeved on the stator tooth 11 between slot 30 and slot 31. The third coil of the A2 winding is sleeved on the stator tooth 11 between slot 24 and slot 25. The fifth coil of the A2 winding is sleeved on the stator tooth 11 between slot 18 and slot 19. The fifth coil of the A2 winding is sleeved on the stator tooth 11 between slot 12 and slot 13. The sixth coil of the A2 winding is sleeved on the stator tooth 11 between slot 6 and slot 7. Among them, the current flow direction of the A2 winding is opposite to that of the A1 winding.

[0082] As Figure 11 shown, the B1 winding has a total of six rectangular wire coils 41. The first coil of the B1 winding is sleeved on the stator tooth 11 between slot 5 and slot 6. The second coil of the B1 winding is sleeved on the stator tooth 11 between slot 11 and slot 12. The third coil of the B1 winding is sleeved on the stator tooth 11 between slot 17 and slot 18. The fourth coil of the B1 winding is sleeved on the stator tooth 11 between slot 23 and slot 24. The fifth coil of the B1 winding is sleeved on the stator tooth 11 between slot 29 and slot 30. The sixth coil of the B1 winding is sleeved on the stator tooth 11 between slot 35 and slot 36.

[0083] As Figure 11 shown, the B2 winding has a total of six rectangular wire coils 41. The first coil of the B2 winding is sleeved on the stator tooth 11 between slot 10 and slot 11. The second coil of the B2 winding is sleeved on the stator tooth 11 between slot 16 and slot 17. The third coil of the B2 winding is sleeved on the stator tooth 11 between slot 22 and slot 23. The fifth coil of the B2 winding is sleeved on the stator tooth 11 between slot 28 and slot 29. The fifth coil of the B2 winding is sleeved on the stator tooth 11 between slot 34 and slot 35. The sixth coil of the B2 winding is sleeved on the stator tooth 11 between slot 4 and slot 5. Among them, the current flow direction of the B2 winding is opposite to that of the B1 winding.

[0084] As Figure 11 shown, the C1 winding has a total of six flat wire coils 41. The first coil of the C1 winding is sleeved on the stator tooth 11 between the 3rd slot and the 4th slot. The second coil of the C1 winding is sleeved on the stator tooth 11 between the 9th slot and the 10th slot. The third coil of the C1 winding is sleeved on the stator tooth 11 between the 15th slot and the 16th slot. The fourth coil of the C1 winding is sleeved on the stator tooth 11 between the 21st slot and the 22nd slot. The fifth coil of the C1 winding is sleeved on the stator tooth 11 between the 27th slot and the 28th slot. The sixth coil of the C1 winding is sleeved on the stator tooth 11 between the 33rd slot and the 34th slot.

[0085] As Figure 11 shown, the C2 winding has a total of six flat wire coils 41. The first coil of the C2 winding is sleeved on the stator tooth 11 between the 2nd slot and the 3rd slot. The second coil of the C2 winding is sleeved on the stator tooth 11 between the 8th slot and the 9th slot. The third coil of the C2 winding is sleeved on the stator tooth 11 between the 14th slot and the 15th slot. The fifth coil of the C2 winding is sleeved on the stator tooth 11 between the 20th slot and the 21st slot. The fifth coil of the C2 winding is sleeved on the stator tooth 11 between the 26th slot and the 27th slot. The sixth coil of the C2 winding is sleeved on the stator tooth 11 between the 32nd slot and the 33rd slot. Among them, the current flow direction of the C2 winding is opposite to that of the C1 winding.

[0086] In another specific embodiment of the present application, a motor is provided. The motor includes a motor stator assembly, and the motor stator assembly is the motor stator assembly in the above embodiment.

[0087] Specifically, the motor includes a motor stator assembly and a motor rotor. The motor rotor is sleeved outside the motor stator assembly. Among them, the motor stator assembly includes: a stator core 10, a busbar assembly 20, a star point ring 30, and a stator winding 40. A plurality of stator teeth 11 are circumferentially and uniformly distributed on the stator core 10. The busbar assembly 20 is connected to the end of the stator core 10 through an insulating bracket 50. The busbar assembly 20 includes a plurality of busbars 21, and at least two of the plurality of busbars 21 are radially spaced apart along the stator core 10. The star point ring 30 is connected to the end of the stator core 10 through an insulating bracket 50, and the star point ring 30 is arranged close to the inner circle of the stator core 10. The stator winding 40 has a plurality of flat wire coils 41, and the flat wire coils 41 are arranged in one-to-one correspondence with the stator teeth 11. One end of the flat wire coil 41 is connected to the star point ring 30, and the other end of the flat wire coil 41 is correspondingly connected to the busbar 21.

[0088] In the embodiments of the present application, at least two of the multiple busbars 21 are distributed at intervals in the radial direction of the stator core 10, so that the multiple busbars 21 are distributed at the same axial height, avoiding the stacked arrangement of the multiple busbars 21 in the axial direction of the stator core 10; the star point ring 30 is arranged close to the inner ring of the stator core 10, so that the star point ring 30 and the busbar 21 are arranged at intervals in the radial direction of the stator core 10, avoiding the stacked arrangement of the star point ring 30 and the busbar 21 in the axial direction of the stator core 10, and enabling the star point ring 30 and the busbar 21 to be distributed at the same axial height; one end of all the flat wire coils 41 can be connected to the star point ring 30 without extending outwards, and the other end of some of the flat wire coils 41 only needs to extend circumferentially to be connected to the corresponding busbar 21. In the above solution, the end of the flat wire coil 41 does not need to extend outwards along the axial direction of the stator core 10, and is connected to the star point ring 30 and the busbar 21 through a short path, reducing the end height of the flat wire coil 41, reducing the axial dimension of the motor, and thus improving the power density of the motor.

[0089] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "above" etc. may be used here to describe the spatial positional relationship of one device or feature shown in the figures with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0090] In addition to the above, it should also be noted that when referring to "one embodiment", "another embodiment", "the embodiment" etc. in this specification, it means that the specific features, structures or characteristics described in connection with that embodiment are included in at least one embodiment generally described in the present application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that the implementation of such feature, structure or characteristic in combination with other embodiments also falls within the scope of the present invention.

[0091] In the above embodiments, each embodiment is described with its own emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A motor stator assembly, characterized in that, Comprising: A stator core (10), on the circumference of which a plurality of stator teeth (11) are evenly distributed; A busbar assembly (20), which is connected to the end of the stator core (10) through an insulating bracket (50). The busbar assembly (20) includes a plurality of busbars (21), and at least two of the plurality of busbars (21) are spaced apart along the radial direction of the stator core (10); A star point ring (30), which is connected to the end of the stator core (10) through the insulating bracket (50), and the star point ring (30) is arranged close to the inner circle of the stator core (10); A stator winding (40), which has a plurality of flat wire coils (41). The flat wire coils (41) are arranged in one-to-one correspondence with the stator teeth (11). One end of the flat wire coil (41) is connected to the star point ring (30), and the other end of the flat wire coil (41) is correspondingly connected to the busbar (21).

2. The motor stator assembly according to claim 1, wherein, The stator winding (40) includes a plurality of winding modules, and the plurality of winding modules are connected in parallel. There are a plurality of busbar assemblies (20), and the busbar assemblies (20) are arranged in one-to-one correspondence with the winding modules. At least two of the plurality of busbar assemblies (20) are spaced apart along the circumferential direction of the stator core (10).

3. The motor stator assembly according to claim 1 or 2, characterized in that, Some of the flat wire coils (41) include: A coil body (411); A first connecting portion (412), which extends along the axial direction of the stator core (10). One end of the first connecting portion (412) is connected to the coil body (411), and the other end of the first connecting portion (412) is connected to the star point ring (30); A second connecting portion (413), which is bent along the circumferential direction of the stator core (10). One end of the second connecting portion (413) is connected to the coil body (411), and the other end of the second connecting portion (413) is connected to the busbar (21).

4. The motor stator assembly according to claim 1 or 2, characterized in that, The insulating bracket (50) includes: A first bracket (51), which is of an annular structure. The first bracket (51) is connected to the end of the stator core (10). A plurality of supporting portions (511) are provided on the first bracket (51), and the plurality of supporting portions (511) are spaced apart along the circumferential direction of the first bracket (51). The busbar (21) is connected between at least two of the supporting portions (511), and the star point ring (30) is connected between at least two of the supporting portions (511).

5. The motor stator assembly according to claim 4, wherein A plurality of slots (512) are provided on each of the supporting portions (511), and the plurality of slots (512) are spaced apart along the radial direction of the first bracket (51). The busbar (21) is inserted into the slots (512).

6. The motor stator assembly according to claim 5, wherein, There are two star point rings (30), and the two star point rings (30) are spaced apart along the axial direction of the stator core (10). The insulating bracket (50) further includes: The second bracket, the second bracket is of an annular structure, a part of the second bracket is connected to the first bracket (51), the second bracket is provided with an annular groove, one star point ring (30) is inserted into the slot (512), and the other star point ring (30) is inserted into the annular groove.

7. The motor stator assembly according to claim 6, characterized in that, One end of the second bracket close to the first bracket (51) is provided with a convex block (522), and the second bracket is inserted into the slot (512) through the convex block (522).

8. The motor stator assembly according to claim 1, wherein, One end of the stator tooth (11) is connected to the yoke portion of the stator core (10), the other end of the stator tooth (11) is provided with a pole shoe (60), the pole shoe (60) is detachably connected to the stator tooth (11), wherein the pole shoe (60) is made of a cobalt-iron alloy.

9. The motor stator assembly according to claim 8, characterized in that, The length of the flat wire coil (41) is less than the length of the stator tooth (11), so as to form a spaced space (70) between the pole shoe (60) and the flat wire coil (41).

10. A motor, the motor comprising a motor stator assembly, characterized in that, The motor stator assembly is the motor stator assembly according to any one of claims 1-9.

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