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. M stator slots are formed on the stator core, each stator slot comprises N slot layers which are distributed at intervals along the radial direction of the stator core, M is a multiple of 3 and is an even number, and N is an odd number. The stator winding comprises a three-phase winding wound on M stator slots of the stator core, the span between two adjacent insertion parts in the Nth slot layer corresponding to two stator slots located on the outermost layer in the radial direction of the stator core in the N slot layers is y-2, and y is the pitch of the motor. Therefore, when winding is carried out on the stator slots arranged on the odd-numbered layers, the circuit of the winding can be optimized, the structure of the stator assembly is simplified, and the difficulty of lap winding when the stator slots arranged on the odd-numbered layers are arranged can be reduced. The stator winding is optimized to facilitate concentrated outgoing of each phase winding of the stator winding, 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 copper loss and improve efficiency.

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

[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 odd 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] Wherein, the plug-in parts of the plurality of 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 adjacent to one side of the middle two stator slots and the plug-in parts corresponding to the middle two 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 adjacent to the other side of the middle two stator slots and the plug-in parts corresponding to the middle two stator slots are arranged in the same-phase winding;

[0009] The span between two adjacent plug-in parts in the Nth slot layer corresponding to the two stator slots located in the outermost layer along the radial direction of the stator core in the N slot layers is y-2, wherein y is the pitch of the motor.

[0010] According to the stator assembly of the embodiment of the utility model, the slot layer of each stator slot is set to an odd number of layers, and the stator assembly adopts the short moment two stator slots to overlap winding when winding, so that when the stator slot winding is set to an odd number of layers, the winding line can be optimized, the structure of the stator assembly is simplified, and the difficulty of overlapping winding when the stator slots of the odd number of layers are set is reduced. At the same time, since the stator winding 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. The stator winding is optimized so that each phase winding of the stator winding can be concentrated to reduce the difficulty of concentrated output. In addition, the height between the two ends of the stator assembly along the axial direction can be reduced, the 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.

[0011] 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.

[0012] In some embodiments, in each of the stator slots of the first slot group, the multiple plug-in portions belonging to the first phase winding and the second phase winding are arranged alternately in the radial direction; and / or in each of the stator slots of the third slot group, the multiple plug-in portions belonging to the second phase winding and the third phase winding are arranged alternately in 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 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.

[0015] In some embodiments, each of the stator slots includes a first hairpin and a second hairpin arranged in sequence from the inside to the outside in the radial direction, a span of some of the first hairpins is y-3, a span of some of the first hairpins is y+1, and a span of the second hairpin is y-2.

[0016] In some embodiments, the slot layers where the two plug-in parts corresponding to the first hairpin are located are the same layer; the slot layers where the two plug-in parts of the second hairpin are located are two adjacent slot layers.

[0017] In some embodiments, the number M of the stator slots is 72, the number N of the slot layers of each stator slot is 7, the stator assembly is configured to match a motor with 6 poles, and each phase winding includes two branches connected in parallel, the two branches include a first branch and a second branch;

[0018] The 72 stator slots of the stator core are numbered 1-72 in sequence, and the 7 slot layers of the stator slots are defined as ag in sequence from the radial inner side to the radial outer side of the stator core;

[0019] 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:

[0020] 1g→11f→1e→11d→1c→11b→1a→14a→24b→14c→24d→14e→24f→14g→24g→34f→24e→34d→24c→34b→24a→15a→25b→15c→25d→15e→25f→15g→

[0021] 25g→35f→25e→35d→25c→35b→25a→38a→48b→38c→48d→38e→48f→38g→

[0022] 48g→58f→48e→58d→48c→58b→48a→39a→49b→39c→49d→39e→49f→39g→

[0023] 49g→59f→49e→59d→49c→59b→49a→62a→72b→62c→72d→62e→72f→62g→

[0024] 72g→10f→72e→10d→72c→10b→72a→63a→1b→63c→1d→63e→1f→63g;

[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] 2g→12f→2e→12d→2c→12b→2a→61a→71b→61c→71d→61e→71f→61g→51a→61f→51e→61d→51c→61b→51a→60a→70b→60c→70d→60e→70f→60g→

[0027] 50g→60f→50e→60d→50c→60b→50a→37a→47b→37c→47d→37e→47f→37g→

[0028] 27g→37f→27e→37d→27c→37b→27a→36a→46b→36c→46d→36e→46f→36g→

[0029] 26g→36f→26e→36d→26c→36b→26a→13a→23b→13c→23d→13e→23f→13g→

[0030] 3g→13f→3e→13d→3c→13b→3a→12a→22b→12c→22d→12e→22f→12g.

[0031] 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.

[0032] In some embodiments, one ends of the two plug-in parts of the first hairpin are connected to each other, and the other ends are spaced apart from each other; one ends of the two plug-in parts of the second hairpin are connected to each other, and the other ends are spaced apart from each other.

[0033] 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.

[0034] The motor according to the second aspect of the present invention comprises the stator assembly described in any one of the above embodiments.

[0035] The power assembly according to the embodiment of the third aspect of the utility model includes the motor described in the above embodiment.

[0036] The vehicle according to the fourth aspect of the present invention comprises the powertrain described in the above embodiment.

[0037] 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

[0038] 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:

[0039] Figure 1 is a schematic diagram of a stator winding of an embodiment of the utility model;

[0040] Figure 2 yes Figure 1 Enlarged schematic diagram of the middle P region;

[0041] Figure 3 is a schematic diagram of the third phase winding of an embodiment of the utility model;

[0042] Figure 4 is a schematic diagram of the second phase winding of an embodiment of the utility model;

[0043] Figure 5 is a schematic diagram of a first phase winding of an embodiment of the utility model;

[0044] Figure 6 This is a schematic diagram of a flat wire hairpin in an embodiment of the utility model arranged in a stator core;

[0045] Figure 7 It is a schematic diagram of the first card issuing embodiment of the utility model;

[0046] Figure 8 It is a schematic diagram of the second card issuing embodiment of the utility model.

[0047] Reference numerals:

[0048] 1. Stator assembly;

[0049] 10. stator core; 11. stator slots; 111. first slot group; 112. second slot group; 113. third slot group;

[0050] 20. stator winding; 21. flat wire hairpin; 211. first hairpin; 212. second 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

[0051] 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 8 A stator assembly 1 according to an embodiment of the present invention is described, comprising: a stator core 10 and a stator winding 20 .

[0052] Specifically, if Figure 1-Figure 5As 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 odd 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.

[0053] 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 adjacent to 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 adjacent to 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.

[0054] In this embodiment, for the six adjacent stator slots 11 arranged at intervals along the circumferential direction of the stator assembly 1, the slot layer matching plug-in parts 215 in the middle two stator slots 11 belong to the same phase winding, that is, the multiple slot layers included in the middle two stator slots 11 belong to the same phase winding. Along the circumferential direction of the stator assembly 1, two stator slots 11 are arranged adjacent to one side of the middle two stator slots 11, and the plug-in parts 215 belonging to the same phase as the middle two stator slots 11 are located in the even-numbered slot layers of the two stator slots 11 adjacent to the one side. Two stator slots 11 are arranged adjacent to the other side of the middle two stator slots 11, and the plug-in parts 215 belonging to the same phase as the middle two stator slots 11 are located in the odd-numbered slot layers of the two stator slots 11 adjacent to the other side.

[0055] The span between two adjacent plug-in portions 215 in the Nth slot layer corresponding to the two stator slots 11 located in the outermost layer along the radial direction of the stator core 10 in the N slot layers is y-2, where y is the pitch of the motor.

[0056] That is, for two different stator slots 11, which are located in the outermost slot layer along the radial direction of the stator assembly 1, the plug-in parts 215 belonging to the same phase winding are respectively located in the outermost slot layer corresponding to the two stator slots 11. For example, the two plug-in parts 215 of the flat wire hairpin 21 arranged at the outermost side respectively correspond to the outermost slot layers of the two stator slots 11, and the span between the two plug-in parts 215 is y-2, and since y is the pitch of the motor, in this embodiment, taking the 6-pole 72-slot flat wire motor as an example, y=12, then at this time, the span between the two plug-in parts 215 located in the outermost slot layer corresponding to different stator slots 11 is 10.

[0057] According to the stator assembly 1 of the embodiment of the utility model, the slot layer of each stator slot 11 is set to an odd number of layers, and the stator assembly 1 adopts a short moment two stator slots 11 stacked winding method during winding, so that when the stator slots 11 with odd number of layers are wound, the winding line can be optimized, the structure of the stator assembly 1 is simplified, and the difficulty of stacking winding when the stator slots 11 with odd number of layers are set is reduced. At the same time, since the stator winding 20 is realized by the short moment and stacked 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 well suppressed. The stator winding 20 is optimized to facilitate the concentrated output of each phase winding of the stator winding 20, reducing the difficulty of concentrated output. In addition, 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.

[0058] In some embodiments, Figure 2 As 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, a plurality of plug-in portions 215 in the second slot group 112 belong to the second phase winding 23, a portion of the plug-in portions 215 in the first slot group 111 belongs to the first phase winding 22, a portion of the plug-in portions 215 in the first slot group 111 belongs to the second phase winding 23, a portion of the plug-in portions 215 in the third slot group 113 belongs to the second phase winding 23, and a portion of the plug-in portions 215 in the third slot group 113 belongs to the third phase winding 24. 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.

[0059] In some embodiments, Figure 2As shown, in each stator slot 11 of the first slot group 111, a plurality of plug-in portions 215 respectively belonging to the first phase winding 22 and the second phase winding 23 are arranged alternately along the radial direction; or in each stator slot 11 of the third slot group 113, a plurality of plug-in portions 215 respectively belonging to the second phase winding 23 and the third phase winding 24 are arranged alternately along the radial direction.

[0060] 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 portions 215 belonging to the first phase winding 22 and the plug-in portions 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 portions 215 belonging to the first phase winding 22 are arranged in the even-numbered slot layers, the plug-in portions 215 belonging to the second phase winding 23 are arranged in the odd-numbered slot layers. The reverse is also possible.

[0061] The multiple slot layers corresponding to the two stator slots 11 in the third slot layer are arranged at intervals along the radial direction of the stator assembly 1, wherein the plug-in portions 215 belonging to the second phase winding 23 and the plug-in portions 215 belonging to the third phase winding 24 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 third slot group 113 include even-numbered slot layers and odd-numbered slot layers, and if the plug-in portions 215 belonging to the second phase winding 23 are arranged in the even-numbered slot layers, the plug-in portions 215 of the third phase winding 24 are arranged in the odd-numbered slot layers.

[0062] Further, refer to Figure 2 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] The plug-in parts 215 belonging to the second phase winding 23 in the first slot group 111 and the plug-in parts 215 belonging to the second phase winding 23 in the third slot group 113 are arranged in a radially staggered manner. 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 parts 215 belonging to the second phase winding 23 in the first slot group 111 are located in the even-numbered slot layers of the corresponding stator slot 11, then the plug-in parts 215 belonging to the second phase winding 23 in the third slot group 113 are located in the odd-numbered slot layers of the corresponding stator slot 11.

[0067] Therefore, 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 in a radially staggered manner along the stator assembly 1, thereby realizing the stator winding 20 in the stator assembly 1, facilitating the output of the stator winding 20, making the winding method of the stator winding 20 simpler, and improving the efficiency of the stator winding 20.

[0068] In some embodiments, as 7 and Figure 8 As shown, it also includes: a welding part 216, the welding part 216 is connected to the plug-in part 215, and the span between two adjacent welding parts 216 in different stator slots 11 in the outermost layer is 10. For two plug-in parts 215 arranged in the outermost slot layer along the radial direction of the stator assembly 1 among the multiple stator slots 11, the welding parts 216 are respectively connected to the corresponding plug-in parts 215, and the span between the two connected welding parts 216 is 10 stator slots 11. Therefore, the larger span between the two welding parts 216 can reduce the number of flat wires in the same phase winding, reduce costs, and facilitate the centralized output of the stator winding 20, reducing the difficulty of output.

[0069] In some embodiments, Figure 7-Figure 8 As shown, each stator slot 11 includes a first hairpin 211 and a second hairpin 212 arranged in sequence from the inside to the outside in the radial direction, the span of some first hairpins 211 is y-3, the span of some first hairpins 211 is y+1, and the span of the second hairpin 212 is y-2. That is, in this embodiment, the spans of the multiple first hairpins 211 used in the same phase winding include two types of y-3 and y+1, that is, the spans of the first hairpins 211 include the first hairpins 211 with 9 spans and the first hairpins 211 with 13 spans, and the span of the second hairpin 212 is 10.

[0070] In some embodiments, Figure 2As shown, the slot layers where the two plug-in parts 215 corresponding to the first hairpin 211 are located are the same layer; the slot layers where the two plug-in parts 215 of the second hairpin 212 are located are two adjacent slot layers. For example, the two plug-in parts 215 of the first hairpin 211 are located in the innermost slot layers along the radial direction of the stator assembly 1 in two different stator slots 11. The two plug-in parts 215 of the second hairpin 212 are respectively located in the adjacent slot layers of different stator slots 11. For example, the slot layers of the stator slot 11 include the first slot layer, the second slot layer, the third slot layer, the fourth slot layer, the fifth slot layer, the sixth slot layer and the seventh slot layer from the inside to the outside along the radial direction of the stator assembly 1. For different stator slots 11, the two plug-in parts 215 of the second hairpin 212 can be respectively located in at least one group of the second slot layer and the third slot layer, the third slot layer and the fourth slot layer, the fourth slot layer and the fifth slot layer, the fifth slot layer and the sixth slot layer, and the sixth slot layer and the seventh slot layer of different stator slots 11.

[0071] In some embodiments, the number M of the stator slots 11 is 72, the number N of slot layers of each stator slot 11 is 7, the stator assembly 1 is configured to match a motor with 6 poles, and each phase winding includes two branches connected in parallel, the two branches include a first branch and a second branch;

[0072] The 72 stator slots 11 of the stator core 10 are numbered 1-72 in sequence, and the 7 slot layers of the stator slots 11 are defined as ag in sequence from the radial inside to the outside of the stator core 10 .

[0073] As shown in the figure, 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:

[0074] 1g→11f→1e→11d→1c→11b→1a→14a→24b→14c→24d→14e→24f→14g→24g→34f→24e→34d→24c→34b→24a→15a→25b→15c→25d→15e→25f→15g→

[0075] 25g→35f→25e→35d→25c→35b→25a→38a→48b→38c→48d→38e→48f→38g→

[0076] 48g→58f→48e→58d→48c→58b→48a→39a→49b→39c→49d→39e→49f→39g→

[0077] 49g→59f→49e→59d→49c→59b→49a→62a→72b→62c→72d→62e→72f→62g→

[0078] 72g→10f→72e→10d→72c→10b→72a→63a→1b→63c→1d→63e→1f→63g.

[0079] As shown in the figure, 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:

[0080] 2g→12f→2e→12d→2c→12b→2a→61a→71b→61c→71d→61e→71f→61g→51a→61f→51e→61d→51c→61b→51a→60a→70b→60c→70d→60e→70f→60g→

[0081] 50g→60f→50e→60d→50c→60b→50a→37a→47b→37c→47d→37e→47f→37g→

[0082] 27g→37f→27e→37d→27c→37b→27a→36a→46b→36c→46d→36e→46f→36g→

[0083] 26g→36f→26e→36d→26c→36b→26a→13a→23b→13c→23d→13e→23f→13g→

[0084] 3g→13f→3e→13d→3c→13b→3a→12a→22b→12c→22d→12e→22f→12g.

[0085] 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.

[0086] In combination with Figure-Figure, in the embodiment of the present application, A, B, and C respectively represent the lead-out 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.

[0087] In some embodiments, Figure 7 and Figure 8As shown, one end of the two plug-in parts 215 of the first hairpin 211 is connected to each other, and the other end is spaced from each other; one end of the two plug-in parts 215 of the second hairpin 212 is connected to each other, and the other end is spaced from each other. The welding part 216 includes a first welding section 2161 and a second welding section 2162. The first welding section 2161 and the second welding section 2162 of the first hairpin 211 are connected, and extend obliquely from one end of the first welding section 2161 connected to the plug-in part 215 to one end of the first welding section 2161 connected to the second welding section 2162. The two first welding sections 2161 and the two second welding sections 2162 are respectively arranged in parallel. The first welding section 2161 of the welding part 216 of the second hairpin 212 extends obliquely toward each other from one end connected to the plug-in part 215 to one end connected to the second welding section 2162, and the second welding sections 2162 of the second hairpin 212 are parallel to each other and spaced. Therefore, the arrangement of the first hairpin 211 and the second hairpin 212 facilitates the cooperation with the corresponding slot layers of different stator slots 11 and facilitates the connection with other flat wire hairpins 21 of the same phase winding.

[0088] 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.

[0089] The motor according to the second aspect of the present invention comprises the stator assembly 1 of any one of the above embodiments.

[0090] 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, the required equipment is less, and it is easier to achieve mass production, reducing 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.

[0091] The powertrain according to the embodiment of the third aspect of the utility model includes the motor in the above embodiment.

[0092] The vehicle according to the fourth aspect of the present utility model comprises the powertrain in the above embodiment.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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 an even number, and N is an odd 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; Wherein, the plug-in parts of the plurality of 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 adjacent to one side of the middle two stator slots and the plug-in parts corresponding to the middle two 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 adjacent to the other side of the middle two stator slots and the plug-in parts corresponding to the middle two stator slots are arranged in the same-phase winding; The span between two adjacent plug-in parts in the Nth slot layer corresponding to the two stator slots located in the outermost layer along the radial direction of the stator core in the N slot layers is y-2, wherein y is the pitch of the motor.

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: In each of the stator slots of the first slot group, a plurality of the plug-in portions respectively belonging to the first phase winding and the second phase winding are alternately arranged along the radial direction; and / or In each of the stator slots of the third slot group, a plurality of the plug-in portions respectively belonging to the second phase winding and the third phase winding are alternately arranged in a radial direction.

4. 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.

5. The stator assembly according to claim 4, 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.

6. The stator assembly according to claim 1, characterized in that Each of the stator slots includes first hairpins and second hairpins arranged in sequence from the inside to the outside in the radial direction, the span of some of the first hairpins is y-3, the span of some of the first hairpins is y+1, and the span of the second hairpins is y-2.

7. The stator assembly according to claim 6, characterized in that The slot layer where the two plug-in parts corresponding to the first hairpin are located is the same layer; The slot layers where the two plug-in parts of the second hairpin are located are two adjacent slot layers.

8. The stator assembly according to claim 2, characterized in that: The number M of the stator slots is 72, the number N of the slot layers of each stator slot is 7, the stator assembly is configured to match a motor with 6 poles, and 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 7 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: 1g→11f→1e→11d→1c→11b→1a→14a→24b→14c→24d→14e→24f→14g→24g→34f→24e→34d→24c→34b→24a→15a→25b→15c→25d→15e→25f→15g→ 25g→35f→25e→35d→25c→35b→25a→38a→48b→38c→48d→38e→48f→38g→ 48g→58f→48e→58d→48c→58b→48a→39a→49b→39c→49d→39e→49f→39g→ 49g→59f→49e→59d→49c→59b→49a→62a→72b→62c→72d→62e→72f→62g→ 72g→10f→72e→10d→72c→10b→72a→63a→1b→63c→1d→63e→1f→63g; 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: 2g→12f→2e→12d→2c→12b→2a→61a→71b→61c→71d→61e→71f→61g→51a→61f→51e→61d→51c→61b→51a→60a→70b→60c→70d→60e→70f→60g→ 50g→60f→50e→60d→50c→60b→50a→37a→47b→37c→47d→37e→47f→37g→ 27g→37f→27e→37d→27c→37b→27a→36a→46b→36c→46d→36e→46f→36g→ 26g→36f→26e→36d→26c→36b→26a→13a→23b→13c→23d→13e→23f→13g→ 3g→13f→3e→13d→3c→13b→3a→12a→22b→12c→22d→12e→22f→12g.

9. 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 are spatially spaced apart by 2q stator slots, wherein q is the number of slots per pole per phase.

10. The stator assembly according to claim 6, characterized in that One ends of the two plug-in parts of the first hairpin are connected to each other, and the other ends are spaced apart from each other; One ends of the two plug-in parts of the second hairpin are connected to each other, and the other ends of the two plug-in parts are spaced apart from each other.

11. The stator assembly according to any one of claims 1 to 10, 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 of the stator assembly in the axial direction.

12. A motor, characterized in that: Comprising a stator assembly according to any one of claims 1-11.

13. A powertrain, characterized in that: Comprising an electric machine according to claim 12.

14. A vehicle, characterized in that: Comprising a powertrain according to claim 13.

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