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 inserting parts of the flat wire hairpins of the branches of the multi-phase winding are located in the N groove layers of the stator grooves respectively, at least two inserting parts in every two adjacent stator grooves belong to different-phase windings, and the number of the inserting parts, belonging to the two different-phase windings, in the stator grooves is the same. Therefore, the stator winding is wound by adopting a short-distance stator slot mode, so that fifth and seventh harmonics in a magnetic field can be effectively eliminated, and 24-order torque pulsation of the motor can be well inhibited. And the connection of the whole winding adopts a lap winding mode and the distribution of the flat wire hairpins, so that the height between the two ends of the stator assembly in the axial direction can be reduced, the use length of copper wires wound on the flat wire hairpins can be 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 motors, 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, reduce the height of the end, 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 utility model is to provide a vehicle, comprising the power assembly described above.

[0007] According to the stator assembly of the first aspect of the utility model, it includes: a stator core and a stator winding, wherein the inner wall of the stator core is provided with M stator slots spaced apart along the circumferential direction, 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 even number; the stator winding includes a multi-phase winding wound on the M stator slots of the stator core, each phase winding includes at least one branch, each branch includes a plurality of flat wire hairpins connected in series, each flat wire hairpin includes two plug-in parts inserted in different stator slots, and each slot layer of each stator slot contains one plug-in part. The plug-in parts of the plurality of flat wire hairpins of the plurality of branches of the multi-phase winding are respectively located in the N slot layers of the stator slot, at least two of the plug-in parts in two adjacent stator slots belong to different phase windings, and the number of plug-in parts belonging to two different phase windings in the stator slot is the same.

[0008] According to the stator assembly of the embodiment of the utility model, the stator winding is wound in a short-distance stator slot manner, so as to effectively eliminate the 5th and 7th harmonics in the magnetic field, and have a good inhibitory effect on the 24th order torque pulsation of the motor. In addition, the connection of the overall winding adopts the overlapping winding method and the distribution of the flat wire hairpin, which can reduce the height between the two ends of the stator assembly along the axial direction, and can reduce the length of the copper wire wound on the flat wire hairpin, reduce the amount of copper and reduce the cost, thereby reducing the resistance, reducing the copper loss and improving the efficiency.

[0009] In some embodiments, the flat wire hairpins in each branch of each phase winding include multiple first hairpins, multiple second hairpins and multiple third hairpins, each of the stator slots is provided with an insert portion of the first hairpin, an insert portion of the second hairpin and an insert portion of the third hairpin, and the insert portion of the first hairpin, at least one insert portion belonging to the second hairpin and an insert portion belonging to the third hairpin are arranged sequentially from the inside to the outside along the radial direction of the stator core.

[0010] In some embodiments, the multi-phase winding includes a first phase winding, a second phase winding and a third phase winding; the three adjacent stator slots include a first slot, a second slot and a third slot arranged in sequence along the circumferential direction, the plug-in parts in the multiple slot layers of the first slot belong to the first phase winding and the second phase winding respectively, the plug-in parts in the multiple slot layers of the second slot all belong to the second phase winding, and the plug-in parts in the multiple slot layers of the third slot belong to the second phase winding and the third phase winding respectively.

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

[0012] In some embodiments, the number of the plug-in parts respectively belonging to the first phase winding and the second phase winding in the first slot is the same; the number of the plug-in parts respectively belonging to the second phase winding and the third phase winding in the third slot is the same.

[0013] In some embodiments, the span of the first hairpin is y-1, the span of the second hairpin is y-1, and the span of the third hairpin is y+1, wherein y is the pitch of the motor.

[0014] In some embodiments, the number M of the stator slots is 48, the number of pole pairs is 8, the pitch y is 6, the span of the first hairpin is 5, the span of the second hairpin is 5, and the span of the third hairpin is 7.

[0015] In some embodiments, the number M of the stator slots is 48, the 48 stator slots are numbered 1-48 in sequence, the slot layers N of each stator slot are 6, and the 6 slot layers are numbered af in sequence from the inside to the outside along the radial direction of the stator core; each phase winding includes two parallel branches, the two parallel branches include a first branch and a second branch, and the threading positions of the multiple plug-in parts corresponding to the multiple flat wire hairpins in the first branch in the 48 stator slots are as follows:

[0016] 1f→42f→37e→42d→37c→42b→37a→32a→37b→32c→37d→32e→

[0017] 37f→30f→25e→30d→25c→30b→25a→20a→25b→20c→25d→20e→

[0018] 25f→18f→13e→18d→13c→18b→13a→8a→13b→8c→13d→8e→

[0019] 13f→6f→1e→6d→1c→6b→1a→44a→1b→44c→1d→44e;

[0020] In the second branch, the threading positions of the plurality of the plug-in parts corresponding to the plurality of the flat wire hairpins in the 48 stator slots are as follows:

[0021] 48f→7f→2e→7d→2c→7b→2a→7a→12b→7c→12d→7e→

[0022] 12f→19f→14e→19d→14c→19b→14a→19a→24b→19c→24d→19e→

[0023] 24f→31f→26e→31d→26c→31b→26a→31a→36b→31c→36d→31e→

[0024] 36f→43f→38e→43d→38c→43b→38a→43a→48b→43c→48d→43e.

[0025] In some embodiments, the first hairpin includes two types of spans, y-1 and y, the span of the second hairpin is y-1, and the span of the third hairpin is y+1, wherein y is the pitch of the motor.

[0026] In some embodiments, the number M of the stator slots is 48, the number of pole pairs is 8, the pitch y is 6, the spans of the first hairpins include 5 and 6, the span of the second hairpins is 5, and the span of the third hairpins is 7.

[0027] In some embodiments, the number M of the stator slots is 48, the 48 stator slots are numbered 1-48 in sequence, the slot layers N of each stator slot are 6, and the 6 slot layers are numbered af in sequence from inside to outside along the radial direction of the stator core;

[0028] Each phase winding includes a branch, and the threading positions of the plurality of plug-in parts corresponding to the plurality of flat wire hairpins in the branch in the 48 stator slots are as follows:

[0029] 1f→42f→37e→42d→37c→42b→37a→32a→37b→32c→37d→32e→

[0030] 37f→30f→25e→30d→25c→30b→25a→20a→25b→20c→25d→20e→

[0031] 25f→18f→13e→18d→13c→18b→13a→19a→24b→19c→24d→19e→

[0032] 24f→31f→26e→31d→26c→31b→26a→31a→36b→31c→36d→31e→

[0033] 36f→43f→38e→43d→38c→43b→38a→43a→48b→43c→48d→43e→

[0034] 48f→7f→2e→7d→2c→7b→2a→7a→12b→7c→12d→7e→

[0035] 12f→19f→14e→19d→14c→19b→14a→8a→13b→8c→13d→8e→

[0036] 13f→6f→1e→6d→1c→6b→1a→44a→1b→44c→1d→44e.

[0037] In some embodiments, there are multiple plug-in portions belonging to the second hairpin in each stator slot, and two plug-in portions of the second hairpin are respectively located in different slot layers.

[0038] In some embodiments, the two plug-in portions of the second hairpin are respectively located in two adjacent slot layers.

[0039] In some embodiments, the flat wire hairpin further includes: two connecting parts and two welding parts, wherein the connecting part is arranged at the same end of the two plug-in parts corresponding to each of the flat wire hairpins, and the ends of the two connecting parts away from the plug-in parts are connected to each other; the welding part is arranged at the end of the two plug-in parts corresponding to each of the flat wire hairpins away from the connecting part.

[0040] In some embodiments, the two welding portions of the second hairpin are bent in the same and parallel directions; or the two welding portions of the second hairpin extend obliquely toward each other at one end away from the plug-in portion and are spaced apart from each other.

[0041] In some embodiments, the two welding portions of the first hairpin are bent in the same and parallel directions; the two welding portions of the third hairpin are bent in the same and parallel directions.

[0042] The motor according to the second aspect of the present invention comprises the stator assembly described in any one of the above embodiments.

[0043] The power assembly according to the embodiment of the third aspect of the utility model includes the motor described in the above embodiment.

[0044] The vehicle according to the fourth aspect of the present invention comprises the motor described in the above embodiment or the powertrain described in the above embodiment.

[0045] 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

[0046] 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:

[0047] Figure 1 It is a schematic diagram of a stator winding according to an embodiment of the present utility model.

[0048] Figure 2 yes Figure 1 Schematic diagram of the enlarged P region.

[0049] Figure 3 It is a schematic diagram of a first phase winding of an embodiment of the utility model.

[0050] Figure 4 It is a schematic diagram of the second phase winding of an embodiment of the utility model.

[0051] Figure 5 It is a schematic diagram of the third phase winding of an embodiment of the utility model.

[0052] Figure 6 It is a schematic diagram of a stator winding of another embodiment of the utility model.

[0053] Figure 7 It is a schematic diagram of a flat wire hairpin in an embodiment of the utility model arranged in a stator core.

[0054] Figure 8 It is a schematic diagram of the first card issuing embodiment of the utility model.

[0055] Fig. 9 It is a schematic diagram of the second card issuing embodiment of the utility model.

[0056] Fig.10 It is a schematic diagram of the third card issuing embodiment of the utility model.

[0057] Reference numerals:

[0058] 1. Stator assembly;

[0059] 10. stator core; 11. stator slot; 111. first slot; 112. second slot; 113. third slot;

[0060] 20. stator winding; 21. flat wire hairpin; 211. first hairpin; 212. second hairpin; 213. third hairpin; 214. connecting part; 215. plug-in part; 216. welding part; 22. first phase winding; 23. second phase winding; 24. third phase winding. DETAILED DESCRIPTION

[0061] 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 10 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 .

[0062] Specifically, if Figure 1-Figure 7 As shown, the inner wall of the stator core 10 is provided with M stator slots 11 spaced apart along the circumferential direction, 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. Each stator slot 11 penetrates the stator core 10 along the circumferential direction of the stator core 10, and the stator core 10 is formed with a through hole for accommodating the mover core and the mover winding, and the stator slot 11 is connected to the through hole along the radial direction of the stator core 10. The stator winding 20 includes a multi-phase winding wound on the M stator slots 11 of the stator core 10, and each phase winding is different from each other in electrical phase.

[0063] Each phase winding includes at least one branch, each branch includes a plurality of flat wire hairpins 21 connected in series, 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. The plug-in portions 215 of the plurality of flat wire hairpins 21 of the plurality of branches of the multi-phase winding are respectively located in N slot layers of the stator slot 11, at least two plug-in portions 215 in two adjacent stator slots 11 belong to different phase windings, and the number of plug-in portions 215 belonging to two different phase windings in the stator slot 11 is the same.

[0064] In this embodiment, the stator assembly 1 includes a three-phase winding, each phase winding includes a plurality of flat wire hairpins 21 connected in series, and the two plug-in parts 215 of each flat wire hairpin 21 are respectively located in the slot layers of different stator slots 11. For example, the plug-in parts 215 in the middle stator slot 11 in three adjacent stator slots 11 belong to the same phase winding, and the plug-in parts 215 in the stator slots 11 on both sides belong to two different phase windings. Moreover, the plug-in parts 215 in half of the slot layers in the plurality of slot layers in the stator slots 11 on both sides are one phase winding, and the plug-in parts 215 in the other half of the slot layers are another phase winding. The plug-in parts 215 belonging to different phase windings are alternately arranged radially in the corresponding stator slots 11.

[0065] Among them, the plug-in parts 215 in half of the slot layers in the multiple slot layers in the stator slots 11 on both sides are one phase winding, and the plug-in parts 215 in the other half of the slot layers are another phase winding, indicating that the winding form of the stator winding 20 is short-distance, and the short-distance is one stator slot 11.

[0066] According to the stator assembly 1 of the embodiment of the utility model, the stator winding 20 is wound in a short-distance stator slot 11, so as to effectively eliminate the 5th and 7th harmonics in the magnetic field, and have a good inhibitory effect on the 24th order torque pulsation of the motor. In addition, the connection of the overall winding adopts the overlapping winding method and the distribution of the flat wire hairpin 21, which can reduce the height between the two ends of the stator assembly 1 along the axial direction, and can reduce the use length of the copper wire wound on the flat wire hairpin 21, reduce the amount of copper used and reduce costs, thereby reducing resistance, reducing copper loss and improving efficiency.

[0067] In some embodiments, Figure 1-Figure 6As shown, the flat wire hairpin 21 in each branch of each phase winding includes a plurality of first hairpins 211, a plurality of second hairpins 212 and a plurality of third hairpins 213, and each stator slot 11 is provided with a plug-in portion 215 of the first hairpin 211, a plug-in portion 215 of the second hairpin 212 and a plug-in portion 215 of the third hairpin 213. The plug-in portion 215 of the first hairpin 211, at least one plug-in portion 215 belonging to the second hairpin 212 and the plug-in portion 215 belonging to the third hairpin 213 are arranged sequentially from inside to outside along the radial direction of the stator core 10. That is, each stator slot 11 includes six slot layers, wherein the plug-in portions 215 arranged in three slot layers are located in the plug-in portions 215 of different flat wire hairpins 21 of the same phase winding, for example, the flat wire hairpin 21 includes a first hairpin 211, a second hairpin 212 and a third hairpin 213, and the plug-in portions 215 in the above three slot layers belong to the first hairpin 211, the second hairpin 212 and the third hairpin 213 from inside to outside along the radial direction of the stator core 10.

[0068] In some embodiments, Figure 1 and Figure 6 As shown, the multi-phase winding includes a first phase winding 22, a second phase winding 23 and a third phase winding 24. For example, in the embodiment of the present application, the first phase winding 22 is a U phase winding, the second phase winding 23 is a V phase winding, and the third phase winding is a W phase winding. The three adjacent stator slots 11 include a first slot 111, a second slot 112 and a third slot 113 arranged in sequence along the circumferential direction. The plug-in parts 215 in multiple slot layers of the first slot 111 belong to the first phase winding 22 and the second phase winding 23 respectively, the plug-in parts 215 in multiple slot layers of the second slot 112 all belong to the second phase winding 23, and the plug-in parts 215 in multiple slot layers of the third slot 113 belong to the second phase winding 23 and the third phase winding 24 respectively.

[0069] For example, each stator slot 11 has six slot layers, and the six slot layers are respectively the first slot layer, the second slot layer, the third slot layer, the fourth slot layer, the fifth slot layer and the sixth slot layer from the inside to the outside along the radial direction of the stator core 10, wherein the three plug-in portions 215 belonging to the first phase winding 22 in the first slot 111 are respectively located in the second slot layer, the fourth slot layer and the sixth slot layer, and the corresponding three plug-in portions 215 belonging to the second phase winding 23 in the second slot 112 are respectively located in the second slot layer, the fourth slot layer and the sixth slot layer. The three plug-in portions 215 belonging to the second phase winding 23 in the third slot 113 are respectively located in the first slot layer, the third slot layer and the fifth slot layer, and the corresponding three plug-in portions 215 belonging to the second phase winding 23 in the second slot 112 are respectively located in the first slot layer, the third slot layer and the fifth slot layer.

[0070] That is, in the embodiment of the present application, each phase winding is arranged in the stator slot 11 of the stator core 10 in the form of a short moment of one stator slot 11. If the plug-in portion 215 in the first slot 111 and the plug-in portion 215 in the second slot 112 that belong to the same phase are located in the even layers, then the plug-in portion 215 in the third slot 113 and the plug-in portion 215 in the second slot 112 that belong to the same phase are located in the odd layers, and vice versa. Thus, the 5th and 7th harmonics in the magnetic field can be effectively eliminated, the 24th order torque pulsation of the motor can be better suppressed, the height of the end of the stator assembly 1 can be reduced during winding, the copper loss can be reduced, and the efficiency can be improved.

[0071] Furthermore, if Figure 2 As shown, the plug-in portions 215 belonging to the second phase winding 23 in the first slot 111 and the plug-in portions 215 belonging to the second phase winding 23 in the third slot 113 are alternately arranged in the radial direction. For example, since the number of slot layers in each stator slot 11 is the same, the number of slot layers of each stator slot 11 in the present application is six, and taking the three plug-in portions 215 belonging to the second phase winding 23 in the first slot 111 as an example, which are respectively located in the second slot layer, the fourth slot layer and the sixth slot layer, the three plug-in portions 215 belonging to the second phase winding 23 in the third slot 113 are respectively located in the first slot layer, the third slot layer and the fifth slot layer.

[0072] Of course, the three plug-in parts 215 belonging to the second phase winding 23 in the first slot 111 can be located in the first slot layer, the second slot layer and the third slot layer respectively, and at this time, the three plug-in parts 215 belonging to the second phase winding 23 in the third slot 113 can be located in the fourth slot layer, the fifth slot layer and the sixth slot layer respectively. That is, the several plug-in parts 215 belonging to the second phase winding 23 in the first slot 111 and the several plug-in parts 215 belonging to the second phase winding 23 in the third slot 113 are alternately distributed along the radial direction of the stator core 10. In this way, it is convenient to set different phase windings on the stator core 10, reduce the number and types of flat wire hairpins 21, and reduce the difficulty of the manufacturing process.

[0073] In some embodiments, the multiple plug-in portions 215 in the first slot 111 that belong to the first phase winding 22 and the second phase winding 23 are arranged alternately along the radial direction; the multiple plug-in portions 215 in the third slot 113 that belong to the second phase winding 23 and the third phase winding 24 are arranged alternately along the radial direction. That is, the plug-in portion 215 belonging to the first phase winding 22 in the first slot 111 and the plug-in portion 215 belonging to the second phase winding 23 in the third slot 113 are located in the same slot layer, and the plug-in portion 215 belonging to the second phase winding 23 in the first slot 111 and the plug-in portion 215 belonging to the third phase winding 24 in the third slot 113 are located in the same slot layer, so that when the flat wire hairpin 21 in the second slot 112 is at a short distance from one stator slot 11, the plug-in portion 215 belonging to the second phase winding 23 in the second slot 112 can be opposite to the plug-in portion 215 in the corresponding slot layer of one of the first slot 111 and the third slot 113, and the remaining plug-in portions 215 belonging to the second phase winding 23 can be opposite to the plug-in portion 215 in the corresponding slot layer of the other of the first slot 111 and the third slot 113.

[0074] In some embodiments, Figure 2 As shown, the number of plug-in parts 215 in the first slot 111 belonging to the first phase winding 22 and the second phase winding 23 is the same; the number of plug-in parts 215 in the third slot 113 belonging to the second phase winding 23 and the third phase winding 24 is the same. That is, the plug-in parts 215 in the first slot 111 belonging to the second phase winding 23 or the first phase winding 22 occupy half of the number of slot layers of the first slot 111, and the plug-in parts 215 in the third slot 113 belonging to the second phase winding 23 or the third phase winding 24 occupy half of the number of slot layers of the third slot 113. That is, except for the stator slots 11 in which the plug-in parts 215 arranged in all slot layers belong to the same phase winding, the plug-in parts 215 in the slot layers in other stator slots 11 are arranged in two different phase windings.

[0075] In some embodiments, the span of the first hairpin 211 is y-1, the span of the second hairpin 212 is y-1, and the span of the third hairpin 213 is y+1, where y is the pitch of the motor. In this embodiment, the number M of the stator slots 11 is 48, the number of pole pairs is 8, and the pitch y is 6. That is, the span of the first hairpin 211 is 5, the span of the second hairpin 212 is 5, and the span of the third hairpin 213 is 7.

[0076] In some embodiments, Figure 1-Figure 5As shown, 48 stator slots 11 are numbered 1-48 in sequence, the slot layer N of each stator slot 11 is 6, and the 6 slot layers are numbered af in sequence from the inside to the outside along the radial direction of the stator core 10; when the span of the first hairpin 211 is 6, the span of the second hairpin 212 is 5, and the span of the third hairpin 213 is 7, each phase winding includes two parallel branches, and the two parallel branches include a first branch and a second branch. In the first branch, the threading positions of the multiple plug-in portions 215 corresponding to the multiple flat wire hairpins 21 in the 48 stator slots 11 are as follows:

[0077] 1f→42f→37e→42d→37c→42b→37a→32a→37b→32c→37d→32e→

[0078] 37f→30f→25e→30d→25c→30b→25a→20a→25b→20c→25d→20e→

[0079] 25f→18f→13e→18d→13c→18b→13a→8a→13b→8c→13d→8e→

[0080] 13f→6f→1e→6d→1c→6b→1a→44a→1b→44c→1d→44e;

[0081] In the second branch, the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the 48 stator slots 11 are as follows:

[0082] 48f→7f→2e→7d→2c→7b→2a→7a→12b→7c→12d→7e→

[0083] 12f→19f→14e→19d→14c→19b→14a→19a→24b→19c→24d→19e→

[0084] 24f→31f→26e→31d→26c→31b→26a→31a→36b→31c→36d→31e→

[0085] 36f→43f→38e→43d→38c→43b→38a→43a→48b→43c→48d→43e.

[0086] In the embodiment of the present application, A1, B1, and C1 respectively represent the lead-out lines of the first branch corresponding to the first phase winding 22, the second phase winding 23, and the third phase winding 24, A2, B2, and C2 respectively represent the lead-out lines of the second branch corresponding to the first phase winding 22, the second phase winding 23, and the third phase winding 24, X1, Y1, and Z1 respectively represent the star point lines of the first branch corresponding to the first phase winding 22, the second phase winding 23, and the third phase winding 24, and X2, Y2, and Z2 respectively represent the star point lines of the second branch corresponding to the first phase winding 22, the second phase winding 23, and the third phase winding 24.

[0087] In some embodiments, the first hairpin 211 includes two types of spans, y-1 and y, the second hairpin 212 has a span of y-1, and the third hairpin 213 has a span of y+1, where y is the pitch of the motor. In this embodiment, the number M of the stator slots 11 is 48, the number of pole pairs is 8, the pitch y is 6, the first hairpin 211 has two types of spans, 5 and 6, the second hairpin 212 has a span of 5, and the third hairpin 213 has a span of 7.

[0088] In some embodiments, Figure 6 As shown, the number M of the stator slots 11 is 48, the 48 stator slots 11 are numbered 1-48 in sequence, the number of slot layers N of each stator slot 11 is 6, and the numbering of the 6 slot layers is numbered af in sequence from inside to outside along the radial direction of the stator core 10;

[0089] When the span of the first hairpin 211 includes 5 and 6, the span of the second hairpin 212 is 5, and the span of the third hairpin 213 is 7, each phase winding includes a branch, and the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the branch in the 48 stator slots 11 are as follows:

[0090] 1f→42f→37e→42d→37c→42b→37a→32a→37b→32c→37d→32e→

[0091] 37f→30f→25e→30d→25c→30b→25a→20a→25b→20c→25d→20e→

[0092] 25f→18f→13e→18d→13c→18b→13a→19a→24b→19c→24d→19e→

[0093] 24f→31f→26e→31d→26c→31b→26a→31a→36b→31c→36d→31e→

[0094] 36f→43f→38e→43d→38c→43b→38a→43a→48b→43c→48d→43e→

[0095] 48f→7f→2e→7d→2c→7b→2a→7a→12b→7c→12d→7e→

[0096] 12f→19f→14e→19d→14c→19b→14a→8a→13b→8c→13d→8e→

[0097] 13f→6f→1e→6d→1c→6b→1a→44a→1b→44c→1d→44e.

[0098] When the span of the first hairpin 211 is 6, the span of the second hairpin 212 is 5, and the span of the third hairpin 213 is 7, the threading positions of the plurality of plug-in portions 215 corresponding to the plurality of flat wire hairpins 21 in the branch of each phase winding in the 48 stator slots 11 are as follows:

[0099] 1f→42f→37e→42d→37c→42b→37a→31a→36b→31c→36d→31e→

[0100] 36f→43f→38e→43d→38c→43b→38a→32a→37b→32c→37d→32e→

[0101] 37f→30f→25e→30d→25c→30b→25a→19a→24b→19c→24d→19e→

[0102] 24f→31f→26e→31d→26c→31b→26a→20a→25b→20c→25d→20e→

[0103] 25f→18f→13e→18d→13c→18b→13a→7a→12b→7c→12d→7e→

[0104] 12f→19f→14e→19d→14c→19b→14a→8a→13b→8c→13d→8e→

[0105] 13f→6f→1e→6d→1c→6b→1a→43a→48b→43c→48d→43e→

[0106] 48f→7f→2e→7d→2c→7b→2a→44a→1b→44c→1d→44e.

[0107] 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=48 / 8 / 3=2, that is, the interval between the star point line and the lead line corresponding to each phase winding is 4 stator slots 11.

[0108] Combination Figure 6 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. All the lead wires of the three-phase winding are distributed in the sixth slot layer of different stator slots 11, and all the star point lines of the three-phase winding are distributed in the fifth slot layer of different stator slots 11, so as to facilitate the welding of different lead wires and star point lines.

[0109] In some embodiments, there are multiple plug-in parts 215 belonging to the second hairpin 212 in each stator slot 11, and the two plug-in parts 215 of the second hairpin 212 are respectively located in different slot layers. The two plug-in parts 215 of the second hairpin 212 are respectively located in two adjacent slot layers. In the embodiment of the present application, the two plug-in parts 215 of the first hairpin 211 are located in the innermost slot layer of different stator slots 11, the two plug-in parts 215 of the third hairpin 213 are located in the outermost slot layer of different stator slots 11, and 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 two plug-in parts 215 of the second hairpin 212 are respectively located in the second slot layer and the third slot layer or the fourth slot layer and the fifth slot layer of the adjacent stator slots 11, so as to realize the mutual connection between the first hairpin 211, the second hairpin 212 and the third hairpin 213.

[0110] Optionally, refer to Figure 8-Figure 10 The flat wire hairpin 21 also includes: two connecting parts 214 and two welding parts 216. The connecting part 214 is provided at the same end of the two plug-in parts 215 corresponding to each flat wire hairpin 21, and the ends of the two connecting parts 214 away from the plug-in parts 215 are connected to each other; the welding part 216 is provided at the ends of the two plug-in parts 215 corresponding to each flat wire hairpin 21 away from the connecting part 214. That is, each flat wire hairpin 21 includes two plug-in parts 215 for connecting with the slot layer, one end of the two plug-in parts 215 is respectively connected to the connecting part 214, one end of the two connecting parts 214 away from the plug-in parts 215 is connected to each other, and the other end of the two plug-in parts 215 is respectively connected to the welding part 216, and the two welding parts 216 are arranged at intervals from each other. When different flat wire hairpins 21 are connected, the welding parts 216 of different flat wire hairpins 21 are welded to each other to realize the series connection of multiple different flat wire hairpins 21.

[0111] In some embodiments, Fig. 9 As shown, the two welding portions 216 of the second hairpin 212 are bent in the same and parallel directions; or the two welding portions 216 of the second hairpin 212 extend obliquely toward each other from one end away from the plug-in portion 215 and are spaced apart from each other along the radial direction of the stator core 10 .

[0112] The two plug-in parts 215 of the second hairpin 212 connected between different slot layers are connected to each other at one end along the axial direction of the stator core 10, and the other ends are spaced apart from each other along the radial direction of the stator core 10. That is, the two plug-in parts 215 are located in different slot layers of the same stator slot 11, and the two flat wire hairpins 21 adjacent to the second hairpin 212 and belonging to the same phase winding are respectively connected to the other end of the second hairpin 212, that is, the ends of the two plug-in parts 215 that are away from each other, so as to realize the series connection between the multiple flat wire hairpins 21 included in the different phase windings. The welding process is reduced, and the series connection between different flat wire hairpins 21 is convenient for rapid realization.

[0113] The multiple branches of the multi-phase winding respectively include multiple flat wire hairpins 21, and the plug-in parts 215 of the multiple flat wire hairpins 21 are welded at the same end in the axial direction of the stator assembly 1. That is, the welding parts 216 of the multiple plug-in parts 215 for welding are respectively arranged toward the same end in the axial direction of the stator core 10, so as to facilitate welding between multiple different flat wire hairpins 21 at the same end of the stator core 10 to form a closed loop.

[0114] In some embodiments, Figure 8 and Fig.10 As shown, in this embodiment, the two welding portions 216 of the first hairpin 211 included in each phase winding are bent in the same and parallel directions; the two welding portions 216 of the third hairpin 213 included in each phase winding are bent in the same and parallel directions. When the first hairpin 211 and the third hairpin 213 are located in the same slot layer of the corresponding different stator slots 11, it is convenient to weld and connect the first hairpin 211 and the third hairpin 213 to the two adjacent flat wire hairpins 21, thereby improving the connection efficiency between the multiple flat wire hairpins 21.

[0115] The motor according to the second embodiment of the utility model comprises the stator assembly 1 of any one of the above embodiments.

[0116] 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.

[0117] The powertrain according to the embodiment of the third aspect of the utility model includes the motor in the above embodiment.

[0118] The vehicle according to the fourth aspect of the present utility model comprises the motor in the above embodiment or the powertrain in the above embodiment.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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 the inner wall of the stator core is provided with M stator slots spaced apart along the circumferential direction, 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 is an even number, and N is an even number; A stator winding, the stator winding comprising a multi-phase winding wound on M stator slots of the stator core, each phase winding comprising at least one branch, each branch comprising a plurality of flat wire hairpins connected in series, each flat wire hairpin comprising two plug-in parts inserted in different stator slots, and each slot layer of each stator slot accommodates one plug-in part; Among them, the plug-in parts of the multiple flat wire hairpins of the multiple branches of the multi-phase windings are respectively located in the N slot layers of the stator slots, at least two of the plug-in parts in two adjacent stator slots belong to different phase windings, and the number of plug-in parts belonging to two different phase windings in the stator slots is the same.

2. The stator assembly according to claim 1, characterized in that The flat wire hairpins in each branch of each phase winding include a plurality of first hairpins, a plurality of second hairpins and a plurality of third hairpins, and each of the stator slots is provided with an inserting portion of the first hairpin, an inserting portion of the second hairpin and an inserting portion of the third hairpin, and the inserting portion belonging to the first hairpin, at least one inserting portion belonging to the second hairpin and an inserting portion belonging to the third hairpin are arranged sequentially from the inside to the outside along the radial direction of the stator core.

3. The stator assembly according to claim 1, characterized in that: The multi-phase windings include a first phase winding, a second phase winding and a third phase winding; The three adjacent stator slots include a first slot, a second slot and a third slot arranged in sequence along the circumferential direction, the plug-in parts in the multiple slot layers of the first slot belong to the first phase winding and the second phase winding respectively, the plug-in parts in the multiple slot layers of the second slot all belong to the second phase winding, and the plug-in parts in the multiple slot layers of the third slot belong to the second phase winding and the third phase winding respectively.

4. The stator assembly according to claim 3, characterized in that: The plug-in portions belonging to the second phase winding in the first slot and the plug-in portions belonging to the second phase winding in the third slot are alternately arranged in a radial direction.

5. The stator assembly according to claim 3, characterized in that: The numbers of the plug-in parts respectively belonging to the first phase winding and the second phase winding in the first slot are the same; The numbers of the plug-in parts respectively belonging to the second phase winding and the third phase winding in the third slot are the same.

6. The stator assembly according to claim 2, characterized in that: The span of the first hairpin is y-1, the span of the second hairpin is y-1, and the span of the third hairpin is y+1, wherein y is the pitch of the motor.

7. The stator assembly according to claim 6, characterized in that The number M of the stator slots is 48, the number of pole pairs is 8, the pitch y is 6, the span of the first hairpin is 5, the span of the second hairpin is 5, and the span of the third hairpin is 7.

8. The stator assembly according to claim 6, characterized in that The number M of the stator slots is 48, the 48 stator slots are numbered 1-48 in sequence, the number of slot layers N of each stator slot is 6, and the numbering of the 6 slot layers is numbered af in sequence from inside to outside along the radial direction of the stator core; Each phase winding includes two parallel branches, the two parallel branches include a first branch and a second branch, and the threading positions of the plurality of plug-in parts corresponding to the plurality of flat wire hairpins in the first branch in the 48 stator slots are as follows: 1f→42f→37e→42d→37c→42b→37a→32a→37b→32c→37d→32e→ 37f→30f→25e→30d→25c→30b→25a→20a→25b→20c→25d→20e→ 25f→18f→13e→18d→13c→18b→13a→8a→13b→8c→13d→8e→ 13f→6f→1e→6d→1c→6b→1a→44a→1b→44c→1d→44e; In the second branch, the threading positions of the plurality of the plug-in parts corresponding to the plurality of the flat wire hairpins in the 48 stator slots are as follows: 48f→7f→2e→7d→2c→7b→2a→7a→12b→7c→12d→7e→ 12f→19f→14e→19d→14c→19b→14a→19a→24b→19c→24d→19e→ 24f→31f→26e→31d→26c→31b→26a→31a→36b→31c→36d→31e→ 36f→43f→38e→43d→38c→43b→38a→43a→48b→43c→48d→43e.

9. The stator assembly according to claim 2, characterized in that: The first hairpin includes two types of spans: y-1 and y, the second hairpin has a span of y-1, and the third hairpin has a span of y+1, wherein y is the pitch of the motor.

10. The stator assembly according to claim 9, characterized in that The number M of the stator slots is 48, the number of pole pairs is 8, the pitch y is 6, the spans of the first hairpins include 5 and 6, the span of the second hairpins is 5, and the span of the third hairpins is 7.

11. The stator assembly according to claim 9, characterized in that The number M of the stator slots is 48, the 48 stator slots are numbered 1-48 in sequence, the number of slot layers N of each stator slot is 6, and the numbering of the 6 slot layers is numbered af in sequence from inside to outside along the radial direction of the stator core; Each phase winding includes a branch, and the threading positions of the plurality of plug-in parts corresponding to the plurality of flat wire hairpins in the branch in the 48 stator slots are as follows: 1f→42f→37e→42d→37c→42b→37a→32a→37b→32c→37d→32e→ 37f→30f→25e→30d→25c→30b→25a→20a→25b→20c→25d→20e→ 25f→18f→13e→18d→13c→18b→13a→19a→24b→19c→24d→19e→ 24f→31f→26e→31d→26c→31b→26a→31a→36b→31c→36d→31e→ 36f→43f→38e→43d→38c→43b→38a→43a→48b→43c→48d→43e→ 48f→7f→2e→7d→2c→7b→2a→7a→12b→7c→12d→7e→ 12f→19f→14e→19d→14c→19b→14a→8a→13b→8c→13d→8e→ 13f→6f→1e→6d→1c→6b→1a→44a→1b→44c→1d→44e.

12. The stator assembly according to claim 2, characterized in that There are a plurality of the plug-in parts belonging to the second hairpin in each of the stator slots, and the two plug-in parts of the second hairpin are respectively located in different slot layers.

13. The stator assembly according to claim 12, characterized in that The two plug-in parts of the second hairpin are respectively located in two adjacent slot layers.

14. The stator assembly according to claim 2, characterized in that The flat wire hairpin also includes: Two connecting parts, the connecting parts are arranged at the same end of the two plug-in parts corresponding to each of the flat wire hairpins, and the ends of the two connecting parts away from the plug-in parts are connected to each other; Two welding parts, the welding parts are arranged at one end of the two plug-in parts corresponding to each of the flat wire hairpins away from the connecting part.

15. The stator assembly according to claim 14, characterized in that The two welding portions of the second hairpin are bent in the same and parallel directions; or The two welding portions of the second hairpin extend obliquely toward each other at one end away from the plug-in portion and are spaced apart from each other.

16. The stator assembly according to claim 14, characterized in that The two welding portions of the first hairpin are bent in the same and parallel directions; The two welding portions of the third hairpin are bent in the same and parallel directions.

17. A motor, characterized in that: Comprising a stator assembly according to any one of claims 1-16.

18. A powertrain, characterized in that: Comprising an electric machine as claimed in claim 17.

19. A vehicle, characterized in that: It comprises the electric machine according to claim 17 or the powertrain according to claim 18.

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