Stator assembly, motor, power assembly and vehicle

Abstract

The utility model discloses a stator assembly, a motor, a power assembly and a vehicle. The stator assembly comprises a stator core and a stator winding. The insertion parts of the plurality of hairpins of each phase of winding are respectively positioned in N slot layers of the stator slots, and in the six adjacent stator slots, the insertion parts corresponding to the N slot layers in the two middle stator slots belong to the same-phase winding; the insertion parts in the even number of slot layers corresponding to the two stator slots on one side of the two middle stator slots and the corresponding insertion parts in the two middle stator slots belong to the same-phase winding; and the inserting parts in the odd-number slot layers corresponding to the two stator slots on the other side of the two middle stator slots and the corresponding inserting parts in the two middle stator slots are arranged on the same-phase winding. Therefore, the circuit of the winding can be optimized, and the structure of the flat wire hairpin can be simplified, so that the structure of the used hairpin is simpler, concentrated wire outgoing of the stator winding is facilitated, the wire outgoing difficulty is reduced, the copper consumption is reduced, the cost is reduced, the resistance is reduced, the copper consumption is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a stator component, a motor, a power assembly and a vehicle. Background Art

[0002] In the prior art, the stator winding includes a plurality of hairpin coils, which are inserted into the stator slots of the stator core in a certain arrangement to form the winding of the required single-phase motor or multi-phase motor. However, in most existing motors, the hairpin coils used in the stator winding are of many types, with complex manufacturing processes, high production costs and low processing efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the utility model is to provide a stator assembly that can reduce the height of the flat wire hairpin, reduce copper loss and improve efficiency.

[0004] The second objective of the present invention is to provide a motor, comprising the stator assembly described above.

[0005] The third objective of the present invention is to provide a power assembly, comprising the motor described above.

[0006] A fourth objective of the present invention is to provide a vehicle comprising the powertrain described above.

[0007] According to a stator assembly of an embodiment of the first aspect of the utility model, the stator assembly comprises: a stator core and a stator winding, wherein M stator slots are formed on the stator core, each of the stator slots comprises N slot layers spaced apart along the radial direction of the stator core, M is a multiple of 3 and an even number, and N is an even number; the stator winding comprises a three-phase winding wound on the M stator slots of the stator core, each phase winding comprises a plurality of hairpins connected in series, each of the hairpins comprises two plug-in portions inserted in different stator slots, and each slot layer of each stator slot accommodates one of the plug-in portions;

[0008] Among them, the plug-in parts of the multiple hairpins of the winding of each phase are respectively located in the N slot layers of the stator slots, and among the six adjacent stator slots, the plug-in parts corresponding to the N slot layers in the middle two stator slots all belong to the same-phase winding, the plug-in parts in the even-numbered slot layers corresponding to the two stator slots on one side of the two middle stator slots and the plug-in parts corresponding to the two middle stator slots belong to the same-phase winding, and the plug-in parts in the odd-numbered slot layers corresponding to the two stator slots on the other side of the two middle stator slots and the plug-in parts corresponding to the two middle stator slots are arranged in the same-phase winding.

[0009] According to the stator assembly of the embodiment of the utility model, the stator assembly adopts the short moment and two stator slots to overlap winding when winding, which can optimize the winding line, simplify the structure and distribution of the flat wire hairpin, so that the structure of the flat wire hairpin used is simpler, which is convenient for the centralized output of the stator winding and reduces the difficulty of output. At the same time, the current circulation generated in the stator winding of the stator assembly can be avoided, so that the voltage of each branch of the stator winding can be balanced. And because the stator winding is realized by short moment and overlapping winding, the 5th and 7th harmonics in the magnetic field can be effectively eliminated, and the 24th order torque pulsation of the motor can be better suppressed. And the height between the two ends of the stator assembly along the axial direction can be reduced, the use length of the copper wire wound on the flat wire hairpin can be reduced, the amount of copper used can be reduced to reduce costs, thereby reducing resistance, reducing copper loss and improving efficiency.

[0010] In some embodiments, the three-phase winding includes a first phase winding, a second phase winding and a third phase winding; the adjacent six stator slots include a first slot group, a second slot group and a third slot group arranged in sequence along the circumferential direction, a plurality of the plug-in portions in the second slot group belong to the second phase winding, some of the plug-in portions in the first slot group belong to the first phase winding, some of the plug-in portions in the first slot group belong to the second phase winding, some of the plug-in portions in the third slot group belong to the second phase winding, and some of the plug-in portions in the third slot group belong to the third phase winding.

[0011] In some embodiments, the plug-in portion belonging to the second phase winding in the first slot group and the plug-in portion belonging to the second phase winding in the third slot group are arranged staggered in the radial direction.

[0012] In some embodiments, the multiple plug-in portions in the first slot group that respectively belong to the first phase winding and the second phase winding are arranged alternately along the radial direction; and / or the multiple plug-in portions in the third slot group that respectively belong to the second phase winding and the third phase winding are arranged alternately along the radial direction.

[0013] In some embodiments, the first slot group, the second slot group and the third slot group respectively include two stator slots, the plug-in portions in the two stator slots of the second slot group belong to the same-phase winding, the plug-in portions in the two stator slots of the first slot group that belong to the same-phase winding are located in the same slot layer, and the plug-in portions in the two stator slots of the third slot group that belong to the same-phase winding are located in the same slot layer.

[0014] In some embodiments, the multiple hairpins connected in series in each phase winding include a first hairpin, a second hairpin and a third hairpin arranged in sequence from the inside to the outside along the radial direction of the stator core, the two plug-in portions of the first hairpin are respectively arranged in the innermost slot layers of different stator slots along the radial direction, the two plug-in portions of the third hairpin are respectively arranged in the outermost slot layers of different stator slots along the radial direction, and the second hairpin is arranged in adjacent slot layers of different stator slots.

[0015] In some embodiments, the span of some of the first hairpins is y-3, the span of some of the first hairpins is y+1, the span of the second hairpins is y-2, and the span of the third hairpin includes at least one of y-1, y and y+1, wherein y is the pitch of the motor.

[0016] In some embodiments, the spans of the first card issuance are 9 and 13, the span of the second card issuance is 10, and the spans of the third card issuance include 11, 12 and 13.

[0017] In some embodiments, each phase winding includes two branches connected in parallel, the two branches include a first branch and a second branch; the 72 stator slots of the stator core are numbered 1-72 in sequence, and the 6 slot layers of the stator slots are defined as ag from the radial inner side to the outer side of the stator core in sequence;

[0018] In the first branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows:

[0019] 1f→14f→4e→14d→4c→14b→4a→17a→27b→17c→27d→17e→

[0020] 27f→40f→30e→40d→3c→40b→30a→39a→49b→37c→49d→39e→

[0021] 49f→62f→52e→62d→52c→62b→52a→65a→3b→65c→3d→65e→

[0022] 3f→16f→6e→16d→6c→16b→6a→15a→25b→15c→25d→15e→

[0023] 25f→38f→28e→38d→28c→38b→28a→41a→51b→41c→51d→41e→

[0024] 51f→64f→54e→64d→54c→64b→54a→63a→1b→63c→1d→63e;

[0025] In the second branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows:

[0026] 2f→61f→51e→61d→51c→61b→51a→42a→52b→42c→52d→42e→

[0027] 52f→39f→29e→39d→29c→39b→29a→16a→26b→16c→26d→16e→

[0028] 26f→13f→3e→13d→3c→13b→3a→66a→4b→66c→4d→66e→

[0029] 4f→63f→53e→63d→53c→63b→53a→40a→50b→40c→50d→40e→

[0030] 50f→37f→27e→37d→27c→37b→27a→18a→28b→18c→28d→18e→

[0031] 28f→15f→5e→15d→5c→15b→5a→64a→2b→64c→2d→64e.

[0032] In some embodiments, each phase winding includes three branches connected in parallel, and the three branches include a first branch, a second branch, and a third branch;

[0033] The 72 stator slots of the stator core are numbered 1-72 in sequence, and the 6 slot layers of the stator slots are defined as ag from the radial inner side to the outer side of the stator core in sequence;

[0034] In the first branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows:

[0035] 1f→13f→3e→13d→3c→13b→3a→66a→4b→66c→4d→66e→

[0036] 4f→15f→5e→15d→5c→15b→5a→64a→2b→64c→2d→64e→

[0037] 2f→62f→52e→62d→52c→62b→52a→65a→3b→65c→3d→65e→

[0038] 3f→64f→54e→64d→54c→64b→54a→63a→1b→63c→1d→63e;

[0039] In the second branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows:

[0040] 25f→37f→27e→37d→27c→37b→27a→18a→28b→18c→28d→18e→

[0041] 28f→39f→29e→39d→29c→39b→29a→16a→26b→16c→26d→16e→

[0042] 26f→14f→4e→14d→4c→14b→4a→17a→27b→17c→27d→17e→

[0043] 27f→16f→6e→16d→6c→16b→6a→15a→25b→15c→25d→15e;

[0044] In the third branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows:

[0045] 49f→61f→51e→61d→51c→61b→51a→42a→52b→42c→52d→42e→

[0046] 52f→63f→53e→63d→53c→63b→53a→40a→50b→40c→50d→40e→

[0047] 50f→38f→28e→38d→28c→38b→28a→41a→51b→41c→51d→41e→

[0048] 51f→40f→3e→40d→30c→40b→30a→39a→49b→39c→49d→39e.

[0049] In some embodiments, the star point line and the lead-out line corresponding to each phase winding of the stator assembly are spatially separated by 2q stator slots, where q is the number of slots per pole per phase.

[0050] In some embodiments, welding points of the plug-in portions of the plurality of hairpins of the winding of each phase are located at the same end of the stator assembly in the axial direction.

[0051] The motor according to the second aspect of the present invention comprises the stator assembly described in any one of the above embodiments.

[0052] The power assembly according to the embodiment of the third aspect of the utility model includes the motor described in the above embodiment.

[0053] The vehicle according to the fourth aspect of the present invention comprises the powertrain described in the above embodiment.

[0054] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0056] Figure 1 is a schematic diagram of a stator winding of an embodiment of the utility model;

[0057] Figure 2 yes Figure 1 Enlarged schematic diagram of the middle P region;

[0058] Figure 3 is a schematic diagram of a first phase winding of an embodiment of the utility model;

[0059] Figure 4 is a schematic diagram of a second phase winding of an embodiment of the utility model;

[0060] Figure 5 is a schematic diagram of a third phase winding of an embodiment of the utility model;

[0061] Figure 6 This is a schematic diagram of a flat wire hairpin arranged in a stator core in one embodiment of the utility model;

[0062] Figure 7 is a schematic diagram of a first phase winding of another embodiment of the utility model;

[0063] Figure 8 is a schematic diagram of a second phase winding of another embodiment of the utility model;

[0064] Fig. 9 is a schematic diagram of a third phase winding of another embodiment of the utility model;

[0065] Fig.10 It is a schematic diagram of another embodiment of the utility model in which a flat wire hairpin is arranged in a stator core;

[0066] Fig.11 It is a schematic diagram of the first card issuing embodiment of the utility model;

[0067] Fig.12It is a schematic diagram of the second card issuing method of the embodiment of the utility model;

[0068] Fig.13 It is a schematic diagram of the third card issuing embodiment of the utility model.

[0069] Reference numerals:

[0070] 1. Stator assembly;

[0071] 10. stator core; 11. stator slots; 111. first slot group; 112. second slot group; 113. third slot group;

[0072] 20. stator winding; 21. flat wire hairpin; 211. first hairpin; 212. second hairpin; 213. third hairpin; 215. plug-in portion; 216. welding portion; 2161. first welding section; 2162. second welding section; 22. first phase winding; 23. second phase winding; 24. third phase winding. DETAILED DESCRIPTION

[0073] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 13 A stator assembly 1 according to an embodiment of the present invention is described. The stator assembly 1 includes: a stator core 10 and a stator winding 20 .

[0074] Specifically, if Figure 1-Figure 10 As shown, M stator slots 11 are formed on the stator core 10, and each stator slot 11 includes N slot layers spaced apart along the radial direction of the stator core 10, where M is a multiple of 3 and an even number, and N is an even number. The stator winding 20 includes a three-phase winding wound on the M stator slots 11 of the stator core 10, and each phase winding includes a plurality of hairpins connected in series. In this embodiment, the hairpins are flat wire hairpins 21, and each flat wire hairpin 21 includes two plug-in portions 215 inserted in different stator slots 11, and each slot layer of each stator slot 11 accommodates a plug-in portion 215.

[0075] Among them, the plug-in parts 215 of multiple flat wire hairpins 21 of each phase winding are respectively located in N slot layers of the stator slot 11. Among the six adjacent stator slots 11, the plug-in parts 215 corresponding to the N slot layers in the middle two stator slots 11 all belong to the same-phase winding, the plug-in parts 215 in the even-numbered slot layers corresponding to the two stator slots 11 on one side of the two middle stator slots 11 and the corresponding plug-in parts 215 in the two middle stator slots 11 belong to the same-phase winding, and the plug-in parts 215 in the odd-numbered slot layers corresponding to the two stator slots 11 on the other side of the two middle stator slots 11 and the corresponding plug-in parts 215 in the two middle stator slots 11 are arranged in the same-phase winding.

[0076] In this embodiment, for the six adjacent stator slots 11 along the circumferential direction of the stator assembly 1, each stator slot 11 is provided with N slot layers, and the plug-in parts 215 matched in the multiple slot layers included in the two middle stator slots 11 belong to the same phase winding. Along the circumferential direction of the stator assembly 1, part of the plug-in parts 215 provided in the slot layers of the two stator slots 11 arranged on one side of the two middle stator slots 11 and the plug-in parts 215 provided in the slot layers of the two middle stator slots 11 belong to the same phase winding, and part of the plug-in parts 215 provided in the slot layers of the two stator slots 11 arranged on the other side of the two middle stator slots 11 and the plug-in parts 215 provided in the slot layers of the two middle stator slots 11 belong to the same phase winding. At least part of the plug-in parts 215 in the two stator slots 11 respectively arranged on both sides of the middle stator slots 11 along the circumferential direction of the stator assembly 1 and the plug-in parts 215 in the two middle stator slots 11 belong to different phase windings. At least part of the plug-in parts 215 in the two stator slots 11 respectively arranged on both sides of the middle two stator slots 11 along the circumferential direction of the stator assembly 1 belong to different phase windings. The plug-in parts 215 arranged in the multiple slot layers included in the two stator slots 11 located on both sides of the middle two stator slots 11 respectively belong to two different phase windings, and the number of the plug-in parts 215 belonging to the two different phase windings in each stator slot 11 is the same.

[0077] According to the stator assembly 1 of the embodiment of the utility model, the stator assembly 1 adopts the short moment and two stator slots 11 to overlap when winding, which can optimize the winding line, simplify the structure and distribution of the flat wire hairpin 21, so that the structure of the flat wire hairpin 21 used is simpler, which is convenient for the centralized output of the stator winding 20 and reduces the difficulty of output. At the same time, the current circulation generated in the stator winding 20 of the stator assembly 1 can be avoided, so that the voltage of each branch of the stator winding 20 can be balanced. And because the stator winding 20 is realized by the short moment and overlapping winding method, the 5th and 7th harmonics in the magnetic field can be effectively eliminated, and the 24th order torque pulsation of the motor can be better suppressed. And the height between the two ends of the stator assembly 1 along the axial direction can be reduced, the use length of the copper wire wound on the flat wire hairpin 21 can be reduced, the amount of copper used can be reduced to reduce costs, thereby reducing resistance, reducing copper loss and improving efficiency.

[0078] In some embodiments, Figure 2As shown, the three-phase winding includes a first phase winding 22, a second phase winding 23 and a third phase winding 24. The six adjacent stator slots 11 include a first slot group 111, a second slot group 112 and a third slot group 113 arranged in sequence along the circumferential direction, each slot group includes two adjacent stator slots 11, and the first slot group 111, the second slot group 112 and the third slot group 113 are arranged in sequence along the circumferential direction of the stator assembly 1. The multiple plug-in portions 215 in the second slot group 112 belong to the second phase winding 23, some of the plug-in portions 215 in the first slot group 111 belong to the first phase winding 22, some of the plug-in portions 215 in the first slot group 111 belong to the second phase winding 23, some of the plug-in portions 215 in the third slot group 113 belong to the second phase winding 23, and some of the plug-in portions 215 in the third slot group 113 belong to the third phase winding 24.

[0079] That is, the first slot group 111, the second slot group 112 and the third slot group 113 are arranged such that at least part of the plug-in parts 215 in the first slot group 111 and the third slot group 113 belong to different phase windings respectively, and at least part of the plug-in parts 215 belonging to different phase windings in the first slot group 111 and the third slot group 113 belong to the same phase winding as the plug-in parts 215 in the second slot group 112.

[0080] Furthermore, if Figure 2 As shown, the plug-in portion 215 belonging to the second phase winding 23 in the first slot group 111 and the plug-in portion 215 belonging to the second phase winding 23 in the third slot group 113 are arranged staggered in the radial direction.

[0081] It can be understood that each stator slot 11 has the same number of slot layers, and the same slot layers of different stator slots 11 are arranged at intervals along the circumferential direction of the stator assembly 1. If the plug-in portion 215 belonging to the second phase winding 23 in the first slot group 111 is located in the even-numbered slot layers of the corresponding stator slot 11, then the plug-in portion 215 belonging to the second phase winding 23 in the third slot group 113 is located in the odd-numbered slot layers of the corresponding stator slot 11. Alternatively, it can be understood that the plug-in portions 215 belonging to different phase windings in the first slot group 111 and the third slot group 113 are alternately arranged along the radial direction of the stator assembly 1, and the plug-in portions 215 belonging to the first phase winding 22 in the first slot group 111 and the plug-in portions 215 belonging to the third phase winding 24 in the third slot group 113 are alternately arranged along the radial direction of the stator assembly 1.

[0082] Thus, the plug-in portion 215 belonging to the second phase winding 23 in the first slot group 111 and the plug-in portion 215 belonging to the second phase winding 23 in the third slot group 113 are staggered along the radial direction of the stator assembly 1, thereby realizing the stator winding 20 in the stator assembly 1, facilitating the stator winding 20 to be wired in a stacked winding manner with two short slots, and facilitating the output of the stator winding 20, so as to make the winding method of the stator winding 20 simpler and improve the efficiency of the stator winding 20.

[0083] In some embodiments, Figure 2 As shown, the multiple plug-in portions 215 in the first slot group 111, which respectively belong to the first phase winding 22 and the second phase winding 23, are arranged alternately in the radial direction; or, the multiple plug-in portions 215 in the third slot group 113, which respectively belong to the second phase winding 23 and the third phase winding 24, are arranged alternately in the radial direction; or, the multiple plug-in portions 215 in the first slot group 111, which respectively belong to the first phase winding 22 and the second phase winding 23, are arranged alternately in the radial direction, and the multiple plug-in portions 215 in the third slot group 113, which respectively belong to the second phase winding 23 and the third phase winding 24, are arranged alternately in the radial direction.

[0084] In this embodiment, the multiple slot layers corresponding to the two stator slots 11 in the first slot group 111 are arranged at intervals along the radial direction of the stator assembly 1, wherein the plug-in parts 215 belonging to the first phase winding 22 and the plug-in parts 215 belonging to the second phase winding 23 are alternately arranged in the corresponding slot layers along the radial direction of the stator assembly 1. That is, the multiple slot layers corresponding to the two stator slots 11 in the first slot group 111 include even-numbered slot layers and odd-numbered slot layers. If the plug-in parts 215 belonging to the first phase winding 22 are arranged in the even-numbered slot layers, the plug-in parts 215 belonging to the second phase winding 23 are arranged in the odd-numbered slot layers. The reverse is also possible. The plug-in parts 215 belonging to the first phase winding 22 and the second phase winding 23 arranged in the slot layers of each stator slot 11 in the first slot group 111 are respectively alternately arranged in multiple slot layers along the radial direction of the stator assembly 1.

[0085] The plug-in parts 215 belonging to the third phase winding 24 and the second phase winding 23 arranged in the slot layer of each stator slot 11 in the third slot group 113 are respectively arranged alternately in multiple slot layers of the same stator slot 11 along the radial direction of the stator assembly 1. That is, the multiple slot layers corresponding to the two stator slots 11 in the third slot group 113 include even-numbered slot layers and odd-numbered slot layers. If the plug-in parts 215 belonging to the second phase winding 23 are arranged in the even-numbered slot layers, the plug-in parts 215 of the third phase winding 24 are arranged in the odd-numbered slot layers.

[0086] In some embodiments, Figure 2 As shown, the first slot group 111, the second slot group 112 and the third slot group 113 include two stator slots 11 respectively, the plug-in parts 215 in the two stator slots 11 in the second slot group 112 belong to the same-phase winding, the plug-in parts 215 in the two stator slots 11 in the first slot group 111 that belong to the same-phase winding are located in the same slot layer, and the plug-in parts 215 in the two stator slots 11 in the third slot group 113 that belong to the same-phase winding are located in the same slot layer.

[0087] That is, when the plug-in parts 215 in the multiple slot layers included in the first slot group 111 and the third slot group 113 are set, the plug-in parts 215 in the slot layers corresponding to the two stator slots 11 included in the first slot group 111 and belonging to the same phase winding are located in the same slot layer. For example, the plug-in parts 215 set in the odd-numbered slot layers of one of the two stator slots 11 in the first slot group 111 belong to the first phase winding 22, and the plug-in parts 215 set in the even-numbered slot layers belong to the second phase winding 23. Similarly, the plug-in parts 215 set in the same slot layer corresponding to the two stator slots 11 in the third slot group 113 belong to the same phase winding. The plug-in parts 215 set in the corresponding stator slots 11 in the first slot group 111 and the third slot group 113 belong to at least two different phase windings.

[0088] Specifically, the plug-in parts 215 provided in the multiple slot layers of the two stator slots 11 corresponding to the second slot group 112 belong to the same phase winding. The plug-in parts 215 provided in the multiple slot layers of the two stator slots 11 included in the first slot group 111 and the third slot group 113 belong to different phase windings. The two stator slots 11 in the first slot group 111 are the first sub-slot and the second sub-slot, respectively. The plug-in parts 215 provided in the same slot layer of the first sub-slot and the second sub-slot belong to the same phase winding. In this embodiment, the plug-in parts 215 provided in the even-numbered layers of the first sub-slot and the second sub-slot belong to the second phase winding 23, and the plug-in parts 215 provided in the odd-numbered layers of the first sub-slot and the second sub-slot belong to the first phase winding 22.

[0089] Optionally, the two stator slots 11 in the third slot group 113 are the third slot and the fourth slot, respectively. The plug-in parts 215 provided in the same slot layer of the third slot and the fourth slot belong to the same phase winding. In this embodiment, the plug-in parts 215 provided in the even-numbered layers of the third slot and the fourth slot belong to the third phase winding 24, and the plug-in parts 215 provided in the odd-numbered layers of the third slot and the fourth slot belong to the second phase winding 23. At this time, the plug-in parts 215 in the first slot group 111 belonging to the second phase winding 23 and the plug-in parts 215 in the third slot group 113 belonging to the second phase winding 23 are staggered along the radial direction of the stator assembly 1. Thus, the stator assembly 1 can realize the winding by the overlapping winding mode of the two stator slots 11 with short moments, and can effectively realize the winding of the stator assembly 1 with the slot layers of the stator slots 11 being odd-numbered layers.

[0090] In some embodiments, Figure 11-13As shown, the plurality of flat wire hairpins 21 connected in series in each phase winding include a first hairpin 211, a second hairpin 212 and a third hairpin 213 arranged in sequence from inside to outside along the radial direction of the stator core 10, the two plug-in portions 215 of the first hairpin 211 are respectively arranged in the innermost slot layer of different stator slots 11 along the radial direction, the two plug-in portions 215 of the third hairpin 213 are respectively arranged in the outermost slot layer of different stator slots 11 along the radial direction, and the second hairpin 212 is arranged in the adjacent slot layer of different stator slots 11. For example, the first hairpin 211, the second hairpin 212 and the third hairpin 213 are arranged in sequence from inside to outside along the radial direction of the stator assembly 1, the first hairpin 211 is located in the innermost slot layer of different stator slots 11, and the third hairpin 213 is located in the outermost slot layer of different stator slots 11. The two plug-in parts 215 of the second hairpin 212 are respectively matched with two adjacent slot layers of different stator slots 11, so as to realize the series connection of a plurality of flat wire hairpins 21 with different spans of the same phase winding.

[0091] In some embodiments, Figure 11-13 As shown, the span of some first hairpins 211 is y-3, the span of some first hairpins 211 is y+1, the span of the second hairpin 212 is y-2, and the span of the third hairpin 213 includes at least one of y-1, y and y+1, wherein y is the pitch of the motor. That is, in this embodiment, there are two first hairpins 211 with spans of 9 and 13, a second hairpin 212 with a span of 10, and at least one of three third hairpins 213 with spans of 11, 12, and 13. Through the first hairpins 211 with two different spans and the third hairpins 213 and the second hairpin 212 with three different spans, the series connection between the multiple flat wire hairpins 21 of each branch of the same phase winding can be realized, and the wiring mode of the stator winding 20 is realized, which helps to reduce the axial height of the stator assembly 1, reduce the amount of copper used, and reduce the resistance.

[0092] In some embodiments, the span of the first card 211 is 9 and 13, the span of the second card 212 is 10, and the span of the third card 213 includes 11, 12 and 13. At least one first card 211 and third card 213 with different spans are used in each branch.

[0093] In some embodiments, each phase winding includes two branches in parallel, the two branches include a first branch and a second branch; the 72 stator slots 11 of the stator core 10 are numbered 1-72 in sequence, and the 6 slot layers of the stator slots 11 are defined as ag from the radial inside to the outside of the stator core 10 in sequence.

[0094] like Figure 1 and Figure 3 As shown, in the first branch of the first phase winding 22, the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the 72 stator slots 11 are as follows:

[0095] 1f→14f→4e→14d→4c→14b→4a→17a→27b→17c→27d→17e→

[0096] 27f→40f→30e→40d→3c→40b→30a→39a→49b→37c→49d→39e→

[0097] 49f→62f→52e→62d→52c→62b→52a→65a→3b→65c→3d→65e→

[0098] 3f→16f→6e→16d→6c→16b→6a→15a→25b→15c→25d→15e→

[0099] 25f→38f→28e→38d→28c→38b→28a→41a→51b→41c→51d→41e→

[0100] 51f→64f→54e→64d→54c→64b→54a→63a→1b→63c→1d→63e.

[0101] like Figure 1 and Figure 3 As shown, in the second branch of the first phase winding 22, the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the 72 stator slots 11 are as follows:

[0102] 2f→61f→51e→61d→51c→61b→51a→42a→52b→42c→52d→42e→

[0103] 52f→39f→29e→39d→29c→39b→29a→16a→26b→16c→26d→16e→

[0104] 26f→13f→3e→13d→3c→13b→3a→66a→4b→66c→4d→66e→

[0105] 4f→63f→53e→63d→53c→63b→53a→40a→50b→40c→50d→40e→

[0106] 50f→37f→27e→37d→27c→37b→27a→18a→28b→18c→28d→18e→

[0107] 28f→15f→5e→15d→5c→15b→5a→64a→2b→64c→2d→64e.

[0108] The principle of the winding sequence between the first branch and the plurality of flat wire hairpins 21 of the second phase winding 23 and the third phase winding 24 is the same as that of the first phase winding 22 , and will not be elaborated herein.

[0109] In some embodiments, Figure 7-Figure 9 As shown, each phase winding includes three branches connected in parallel, and the three branches include a first branch, a second branch and a third branch;

[0110] The 72 stator slots 11 of the stator core 10 are numbered 1-72 in sequence, and the six slot layers of the stator slots 11 are defined as ag in sequence from the radial inner side to the radial outer side of the stator core 10 .

[0111] like Figure 7 As shown, in the first branch of the first phase winding 22, the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the 72 stator slots 11 are as follows:

[0112] 1f→13f→3e→13d→3c→13b→3a→66a→4b→66c→4d→66e→

[0113] 4f→15f→5e→15d→5c→15b→5a→64a→2b→64c→2d→64e→

[0114] 2f→62f→52e→62d→52c→62b→52a→65a→3b→65c→3d→65e→

[0115] 3f→64f→54e→64d→54c→64b→54a→63a→1b→63c→1d→63e.

[0116] like Figure 8 As shown, in the second branch of the first phase winding 22, the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the 72 stator slots 11 are as follows:

[0117] 25f→37f→27e→37d→27c→37b→27a→18a→28b→18c→28d→18e→

[0118] 28f→39f→29e→39d→29c→39b→29a→16a→26b→16c→26d→16e→

[0119] 26f→14f→4e→14d→4c→14b→4a→17a→27b→17c→27d→17e→

[0120] 27f→16f→6e→16d→6c→16b→6a→15a→25b→15c→25d→15e.

[0121] like Fig. 9 As shown, in the third branch of the first phase winding 22, the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the 72 stator slots 11 are as follows:

[0122] 49f→61f→51e→61d→51c→61b→51a→42a→52b→42c→52d→42e→

[0123] 52f→63f→53e→63d→53c→63b→53a→40a→50b→40c→50d→40e→

[0124] 50f→38f→28e→38d→28c→38b→28a→41a→51b→41c→51d→41e→

[0125] 51f→40f→3e→40d→30c→40b→30a→39a→49b→39c→49d→39e.

[0126] In some embodiments, the star point line and the lead line corresponding to each phase winding of the stator assembly 1 are spaced apart by 2q stator slots 11, where q is the number of slots per pole per phase. Here, q=72 / 6 / 3=4, that is, the interval between the star point line and the lead line corresponding to each phase winding is 8 stator slots 11.

[0127] Combination Figure 1-Figure 13 In the embodiment of the present application, A, B, and C respectively represent the lead wires of the first phase winding 22, the second phase winding 23, and the third phase winding 24, and X, Y, and Z respectively represent the star point lines of the first phase winding 22, the second phase winding 23, and the third phase winding 24. Among them, A1 is the first branch of the first phase winding 22, A2 is the second branch of the first phase winding 22, and A3 is the third branch of the first phase winding 22, and the others are similar.

[0128] The welding portion 216 includes a first welding section 2161 and a second welding section 2162. One end of the first welding section 2161 is connected to the corresponding plug-in portion 215, and the other end of the first welding section 2161 is connected to the second welding section 2162. The other ends of the two second welding sections 2162 are spaced apart from each other. The first welding sections 2161 of the first hairpin 211 and the third hairpin 213 are arranged in parallel and extend obliquely toward one side, and the second welding sections 2162 are parallel to each other. The two first welding sections 2161 of the second hairpin 212 extend obliquely from one end connected to the plug-in portion 215 to the other end connected to the second welding section 2162 toward each other, and the two second welding sections 2162 are parallel to each other and spaced apart.

[0129] In some embodiments, the welding points of the plug-in parts 215 of the plurality of flat wire hairpins 21 of each phase winding are located at the same end in the axial direction of the stator assembly 1. Thus, the arrangement and winding of the flat wire hairpins 21 are facilitated, the structure of the stator winding 20 is simplified, the height of the stator assembly 1 in the axial direction is reduced, and the amount of copper used in the stator winding 20 is reduced, thereby reducing the resistance and improving the efficiency of the motor.

[0130] The motor according to the second aspect of the present invention comprises the stator assembly 1 of any one of the above embodiments.

[0131] According to the motor of the embodiment of the utility model, the types of flat wire hairpins 21 used in the motor can be reduced, and the required equipment is less, which makes it easier to achieve mass production and reduce costs. Moreover, since the stator winding 20 of the motor adopts a short-torque method, the 5th and 7th harmonics in the magnetic field can be more effectively eliminated, and the 24th-order torque pulsation of the motor can be better suppressed. At the same time, the height of the flat wire hairpin 21 coil can be reduced, the amount of copper used can be reduced, and the motor efficiency can be improved.

[0132] The powertrain according to the embodiment of the third aspect of the utility model includes the motor in the above embodiment.

[0133] The vehicle according to the fourth aspect of the present utility model comprises the powertrain in the above embodiment.

[0134] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0135] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

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

Claims

1. A stator assembly, characterized in that: include: A stator core, wherein M stator slots are formed on the stator core, each of the stator slots includes N slot layers spaced apart along the radial direction of the stator core, M is a multiple of 3 and is an even number, and N is an even number; A stator winding, the stator winding comprising a three-phase winding wound on M stator slots of the stator core, each phase winding comprising a plurality of hairpins connected in series, each hairpin comprising two plug-in portions inserted in different stator slots, and each slot layer of each stator slot accommodating one plug-in portion; Among them, the plug-in parts of the multiple hairpins of the winding of each phase are respectively located in the N slot layers of the stator slots, and among the six adjacent stator slots, the plug-in parts corresponding to the N slot layers in the middle two stator slots all belong to the same-phase winding, the plug-in parts in the even-numbered slot layers corresponding to the two stator slots on one side of the two middle stator slots and the plug-in parts corresponding to the two middle stator slots belong to the same-phase winding, and the plug-in parts in the odd-numbered slot layers corresponding to the two stator slots on the other side of the two middle stator slots and the plug-in parts corresponding to the two middle stator slots are arranged in the same-phase winding.

2. The stator assembly according to claim 1, characterized in that: The three-phase winding includes a first phase winding, a second phase winding and a third phase winding; The six adjacent stator slots include a first slot group, a second slot group, and a third slot group arranged in sequence along the circumferential direction. The multiple plug-in parts in the second slot group belong to the second phase winding, some of the plug-in parts in the first slot group belong to the first phase winding, some of the plug-in parts in the first slot group belong to the second phase winding, some of the plug-in parts in the third slot group belong to the second phase winding, and some of the plug-in parts in the third slot group belong to the third phase winding.

3. The stator assembly according to claim 2, characterized in that: The plug-in portion belonging to the second phase winding in the first slot group and the plug-in portion belonging to the second phase winding in the third slot group are arranged staggered in the radial direction.

4. The stator assembly according to claim 2, characterized in that: The plurality of plug-in portions in the first slot group respectively belonging to the first phase winding and the second phase winding are alternately arranged along the radial direction; and / or The plurality of plug-in portions in the third slot group, which respectively belong to the second phase winding and the third phase winding, are alternately arranged in the radial direction.

5. The stator assembly according to claim 2, characterized in that: The first slot group, the second slot group and the third slot group respectively include two stator slots, the plug-in parts in the two stator slots of the second slot group belong to the same-phase winding, the plug-in parts in the two stator slots of the first slot group that belong to the same-phase winding are located in the same slot layer, and the plug-in parts in the two stator slots of the third slot group that belong to the same-phase winding are located in the same slot layer.

6. The stator assembly according to claim 1, characterized in that The multiple hairpins connected in series in each phase winding include a first hairpin, a second hairpin and a third hairpin arranged in sequence from the inside to the outside along the radial direction of the stator core, the two plug-in portions of the first hairpin are respectively arranged in the innermost slot layers of different stator slots along the radial direction, the two plug-in portions of the third hairpin are respectively arranged in the outermost slot layers of different stator slots along the radial direction, and the second hairpin is arranged in adjacent slot layers of different stator slots.

7. The stator assembly according to claim 6, characterized in that The span of some of the first hairpins is y-3, the span of some of the first hairpins is y+1, the span of the second hairpins is y-2, and the span of the third hairpins includes at least one of y-1, y and y+1, wherein y is the pitch of the motor.

8. The stator assembly according to claim 7, characterized in that The spans of the first card issuance are 9 and 13, the span of the second card issuance is 10, and the spans of the third card issuance include 11, 12 and 13.

9. The stator assembly according to claim 2, characterized in that: Each phase winding includes two branches connected in parallel, and the two branches include a first branch and a second branch; The 72 stator slots of the stator core are numbered 1-72 in sequence, and the 6 slot layers of the stator slots are defined as ag from the radial inner side to the outer side of the stator core in sequence; In the first branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows: 1f→14f→4e→14d→4c→14b→4a→17a→27b→17c→27d→17e→ 27f→40f→30e→40d→3c→40b→30a→39a→49b→37c→49d→39e→ 49f→62f→52e→62d→52c→62b→52a→65a→3b→65c→3d→65e→ 3f→16f→6e→16d→6c→16b→6a→15a→25b→15c→25d→15e→ 25f→38f→28e→38d→28c→38b→28a→41a→51b→41c→51d→41e→ 51f→64f→54e→64d→54c→64b→54a→63a→1b→63c→1d→63e; In the second branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows: 2f→61f→51e→61d→51c→61b→51a→42a→52b→42c→52d→42e→ 52f→39f→29e→39d→29c→39b→29a→16a→26b→16c→26d→16e→ 26f→13f→3e→13d→3c→13b→3a→66a→4b→66c→4d→66e→ 4f→63f→53e→63d→53c→63b→53a→40a→50b→40c→50d→40e→ 50f→37f→27e→37d→27c→37b→27a→18a→28b→18c→28d→18e→ 28f→15f→5e→15d→5c→15b→5a→64a→2b→64c→2d→64e.

10. The stator assembly according to claim 2, characterized in that Each phase winding includes three branches connected in parallel, and the three branches include a first branch, a second branch and a third branch; The 72 stator slots of the stator core are numbered 1-72 in sequence, and the 6 slot layers of the stator slots are defined as ag from the radial inner side to the outer side of the stator core in sequence; In the first branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows: 1f→13f→3e→13d→3c→13b→3a→66a→4b→66c→4d→66e→ 4f→15f→5e→15d→5c→15b→5a→64a→2b→64c→2d→64e→ 2f→62f→52e→62d→52c→62b→52a→65a→3b→65c→3d→65e→ 3f→64f→54e→64d→54c→64b→54a→63a→1b→63c→1d→63e; In the second branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows: 25f→37f→27e→37d→27c→37b→27a→18a→28b→18c→28d→18e→ 28f→39f→29e→39d→29c→39b→29a→16a→26b→16c→26d→16e→ 26f→14f→4e→14d→4c→14b→4a→17a→27b→17c→27d→17e→ 27f→16f→6e→16d→6c→16b→6a→15a→25b→15c→25d→15e; In the third branch of the first phase winding, the threading positions of the plurality of plug-in parts corresponding to the plurality of hairpins in the 72 stator slots are as follows: 49f→61f→51e→61d→51c→61b→51a→42a→52b→42c→52d→42e→ 52f→63f→53e→63d→53c→63b→53a→40a→50b→40c→50d→40e→ 50f→38f→28e→38d→28c→38b→28a→41a→51b→41c→51d→41e→ 51f→40f→3e→40d→30c→40b→30a→39a→49b→39c→49d→39e.

11. The stator assembly according to claim 1, characterized in that The star point line and the lead-out line corresponding to each phase winding of the stator assembly differ in space by 2q stator slots, wherein q is the number of slots per pole per phase.

12. The stator assembly according to any one of claims 1 to 11, characterized in that: The welding points of the plug-in parts of the plurality of hairpins of the winding of each phase are located at the same end in the axial direction of the stator assembly.

13. A motor, characterized in that: Comprising a stator assembly according to any one of claims 1-12.

14. A powertrain, characterized in that: Comprising an electric machine according to claim 13.

15. A vehicle, characterized in that: Comprising a powertrain according to claim 14.

Images