Stator, motor, power assembly and vehicle

Abstract

The utility model discloses a stator, a motor, a power assembly and a vehicle, and the stator comprises a stator iron core which is provided with a plurality of stator grooves which are arranged at intervals along the circumferential direction of the stator iron core; and the stator winding comprises a plurality of coil single bodies, the coil single bodies are arranged in the two stator grooves in a penetrating manner, the plurality of coil single bodies are arranged in the same stator groove, and the plurality of coil single bodies in the same stator groove are connected to different branches of the stator winding. According to the stator provided by the utility model, the stator winding comprises the plurality of coil monomers, the coil monomers are arranged in the two stator slots in a penetrating manner, the plurality of coil monomers are arranged in the same stator slot, and the plurality of coil monomers in the same stator slot are connected to different branches of the stator winding. The induction voltage difference value between different branches of the same phase of the stator winding can be reduced, so that ring current between the different branches of the same phase of the stator winding can be avoided, the extra loss of the stator winding can be reduced, and the working efficiency of the motor can be improved.

Description

Stator, motor, powertrain and vehicle Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a stator, a motor, a powertrain, and a vehicle. Background Technology

[0002] In related technologies, the voltages between different branches of the same phase in the stator winding are not equal, i.e., there is a voltage difference, which leads to an increase in the additional losses of the stator winding and affects the working efficiency of the motor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a stator that can reduce the induced voltage difference between different branches of the same phase in the stator winding, thereby reducing the additional losses of the stator winding and improving the working efficiency of the motor.

[0004] Another objective of this invention is to provide an electric motor having the aforementioned stator.

[0005] Another objective of this invention is to provide a powertrain having the aforementioned motor.

[0006] Another objective of this invention is to provide a vehicle having the aforementioned powertrain.

[0007] The stator according to an embodiment of the present invention includes: a stator core having a plurality of stator slots spaced apart along the circumferential direction of the stator core; and a stator winding including a plurality of coil units, each coil unit passing through two of the stator slots, with a plurality of coil units in the same stator slot, and the plurality of coil units in the same stator slot connected to different branches of the stator winding.

[0008] According to the embodiment of this utility model, the stator includes multiple coil units in the stator winding. The coil units are installed in two stator slots. Multiple coil units are located in the same stator slot and connected to different branches of the stator winding. This helps to reduce the induced voltage difference between different branches of the same phase in the stator winding, thereby avoiding circulating current between different branches of the same phase in the stator winding. This reduces the additional losses of the stator winding and improves the working efficiency of the motor.

[0009] In addition, the stator according to the above embodiments of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, each coil unit includes at least one conductor segment located in one of the stator slots, and multiple conductor segments of multiple coil units are arranged along the radial direction of the stator core in the same stator slot.

[0011] According to some embodiments of the present invention, within the same stator slot, two adjacent conductor segments are located in two different coil units.

[0012] According to some embodiments of the present invention, each coil unit includes at least one conductor segment located in one of the stator slots, and the number of conductor segments passing through two stator slots in the same coil unit may be the same or different.

[0013] According to some embodiments of the present invention, the plurality of coil units are divided into multiple groups, and each group of coil units includes a first coil unit and a second coil unit. The two stator slots through which the second coil unit of the same group passes are located between the two stator slots through which the first coil unit passes.

[0014] According to some embodiments of the present invention, the span of the first coil unit is N, and the span of the second coil unit is N-2.

[0015] According to some embodiments of the present invention, each group of coil units further includes a third coil unit, and the two stator slots through which the third coil unit of the same group passes are located between the two stator slots through which the second coil unit passes.

[0016] According to some embodiments of this utility model, the span of the third coil unit is N-4.

[0017] According to some embodiments of the present invention, each group of coil units further includes a third coil unit, the third coil unit and the second coil unit have the same span, and the two stator slots through which the third coil unit in the same group passes are located between the two stator slots through which the first coil unit passes.

[0018] According to some embodiments of the present invention, the span of the first coil unit is N, and the span of the second coil unit and the third coil unit is N-3.

[0019] According to some embodiments of the present invention, each group of coil units further includes a third coil unit, the third coil unit and the first coil unit have the same span, and the two stator slots through which the second coil unit in the same group passes are located between the two stator slots through which the third coil unit passes.

[0020] According to some embodiments of the present invention, the span between the first coil unit and the third coil unit is N, and the span between the second coil unit is N-3.

[0021] According to some embodiments of the present invention, the two ends of the second coil unit in the same group along the axial direction of the stator core are located between the two ends of the first coil unit along the axial direction of the stator core.

[0022] According to some embodiments of the present invention, at least one coil unit is formed by continuously winding a wire; or, the coil unit is formed by connecting multiple U-shaped hairpins.

[0023] According to some embodiments of the present invention, the two ends of the coil unit have a first welding portion and a second welding portion, the first welding portion and the second welding portion extending along the radial direction of the stator core.

[0024] According to some embodiments of this utility model, an insulating element is provided on the inner wall of the stator slot.

[0025] According to some embodiments of the present invention, the stator core includes: a stator yoke, the stator yoke being annular in structure; stator teeth, the stator teeth being a plurality of teeth spaced apart along the circumferential direction of the stator yoke and detachably connected to the stator yoke, a stator slot being formed between two adjacent stator teeth, and the stator winding passing through the stator slot.

[0026] According to some embodiments of the present invention, the inner peripheral wall of the stator yoke is provided with a plurality of tooth grooves corresponding one-to-one with the plurality of stator teeth, the plurality of tooth grooves are arranged at intervals along the circumferential direction of the stator yoke, and the plurality of stator teeth are respectively inserted into the plurality of tooth grooves.

[0027] The motor according to an embodiment of the present invention includes the stator described in the embodiment of the present invention.

[0028] According to the embodiment of the present invention, the motor has a stator winding including multiple coil units, each coil unit passing through two stator slots. Multiple coil units are located in the same stator slot and connected to different branches of the stator winding. This helps to reduce the induced voltage difference between different branches of the same phase in the stator winding, thereby avoiding circulating current between different branches of the same phase in the stator winding, thus reducing the additional losses of the stator winding and improving the working efficiency of the motor.

[0029] The powertrain according to an embodiment of the present invention includes: a transmission mechanism; and a motor according to an embodiment of the present invention, wherein the motor is connected to the transmission mechanism in a transmission manner.

[0030] According to the powertrain of this utility model embodiment, the stator winding includes multiple coil units, each coil unit passing through two stator slots. Multiple coil units are located in the same stator slot and connected to different branches of the stator winding. This helps to reduce the induced voltage difference between different branches of the same phase in the stator winding, thereby avoiding circulating current between different branches of the same phase in the stator winding, thus reducing additional losses in the stator winding and improving the working efficiency of the motor.

[0031] The vehicle according to an embodiment of the present invention includes the powertrain described in the embodiment of the present invention.

[0032] According to the vehicle of this utility model embodiment, the stator winding includes multiple coil units, each coil unit passing through two stator slots. Multiple coil units are located in the same stator slot and connected to different branches of the stator winding. This helps to reduce the induced voltage difference between different branches of the same phase in the stator winding, thereby avoiding circulating current between different branches of the same phase in the stator winding, thus reducing the additional losses of the stator winding and improving the working efficiency of the motor.

[0033] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0035] Figure 1 is an exploded view of the stator according to the first embodiment of the present invention;

[0036] Figure 2 is a schematic diagram of the stator according to the first embodiment of the present invention;

[0037] Figure 3 is a schematic diagram of the stator winding according to the first embodiment of the present invention;

[0038] Figure 4 is a schematic diagram of the stator winding with some coil units removed according to the first embodiment of the present invention;

[0039] Figure 5 is a schematic diagram of the structure of multiple sets of coil units in the stator winding according to the first embodiment of the present invention.

[0040] Figure 6 is a structural schematic diagram of each coil unit of the stator winding according to the first embodiment of the present invention;

[0041] Figure 7 is a structural schematic diagram of the first coil unit of the stator winding according to the first embodiment of the present invention;

[0042] Figure 8 is a structural schematic diagram of the second coil unit of the stator winding according to the first embodiment of the present invention;

[0043] Figure 9 is a wiring diagram of the stator winding according to the first embodiment of the present invention;

[0044] Figure 10 is an enlarged structural diagram of point A circled in Figure 9;

[0045] Figure 11 is an exploded view of the stator according to the second embodiment of the present invention;

[0046] Figure 12 is a schematic diagram of the stator according to the second embodiment of the present invention;

[0047] Figure 13 is a schematic diagram of the stator winding according to the second embodiment of the present invention;

[0048] Figure 14 is a schematic diagram of the stator winding with some coil units removed according to the second embodiment of the present invention;

[0049] Figure 15 is a schematic diagram of the structure of multiple sets of coil units in the stator winding according to the second embodiment of the present invention.

[0050] Figure 16 is a structural schematic diagram of each coil unit of the stator winding according to the second embodiment of the present invention;

[0051] Figure 17 is a schematic diagram of the structure of the first coil unit of the stator winding according to the second embodiment of the present invention;

[0052] Figure 18 is a structural schematic diagram of the second coil unit of the stator winding according to the second embodiment of the present invention;

[0053] Figure 19 is a schematic diagram of the stator core according to an embodiment of the present utility model;

[0054] Figure 20 is a schematic diagram of the stator yoke of the stator core according to an embodiment of the present invention;

[0055] Figure 21 is a schematic diagram of the stator teeth of the stator core according to an embodiment of the present invention;

[0056] Figure 22 is a partial structural schematic diagram of each coil unit of the stator winding according to the third embodiment of the present invention;

[0057] Figure 23 is a partial structural schematic diagram of each coil unit of the stator winding according to the fourth embodiment of the present invention;

[0058] Figure 24 is a partial structural schematic diagram of each coil unit of the stator winding according to the fifth embodiment of the present invention.

[0059] Figure label:

[0060] 100. Stator;

[0061] 1. Stator core; 11. Stator yoke; 12. Stator tooth; 13. Stator slot; 111. Tooth slot; 112. Limiting rib; 121. Limiting slot; 122. Tooth body; 123. Tooth tip;

[0062] 2. Stator winding; 21. Coil unit; 22. Conductor segment; 211. First welded part; 212. Second welded part; 213. First slot; 214. Second slot; 217. First end; 218. Second end;

[0063] 3. Insulating components; 31. Insulating parts;

[0064] 41. First coil unit; 42. Second coil unit; 43. Third coil unit. Detailed Implementation

[0065] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0066] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0067] In the description of this utility model, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "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 through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0068] The stator 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0069] Referring to Figures 1-19, the stator 100 according to an embodiment of the present invention may include: a stator core 1 and a stator winding 2.

[0070] Specifically, the stator core 1 has multiple (two or more) stator slots 13, which are spaced apart along the circumferential direction of the stator core 1. The stator winding 2 includes multiple (two or more) coil units 21, which are inserted into two stator slots 13. Multiple coil units 21 are in the same stator slot 13. Thus, by connecting multiple coil units 21 to each other, the stator winding 2 can be formed, thus fulfilling the winding requirements of the stator winding 2 on the stator core 1.

[0071] The inventors of this application have discovered that, since the voltages between different branches of the same phase in the stator winding 2 are not equal, i.e. there is a voltage difference, when multiple coil units 21 in the stator slot 13 are connected to the same branch of the stator winding 2, it is easy to cause an increase in the additional losses of the stator winding 2, which affects the working efficiency of the motor.

[0072] Therefore, in this invention, as shown in Figures 9 and 10, multiple coil units 21 within the same stator slot 13 are connected to different branches of the stator winding 2. This arrangement of coil units 21 within the same stator slot 13, capable of connecting different branches, helps reduce the induced voltage difference between different branches of the same phase in the stator winding 2, thereby preventing circulating currents between these branches. This reduces additional losses in the stator winding 2 and improves the motor's efficiency. For example, the multiple branches can be multiple branches of the same phase of the motor, i.e., multiple coil units 21 within the same stator slot 13 connected to different branches of the same phase in the stator winding 2; or the multiple branches can be multiple branches on different phases of the motor.

[0073] In some embodiments, the stator core 1 can be formed by a stamping process. The stamping process has a high material utilization rate, which helps to reduce production costs, improve production efficiency, and facilitate the achievement of high precision.

[0074] In some embodiments, the stator core 1 can be formed by die casting and sintering. The die casting and sintering process is convenient for processing stator cores with complex shapes, and can make the stator core 1 have good consistency and meet the required processing requirements.

[0075] In some embodiments, the stator winding 2 can be formed by a mold, which facilitates meeting the slot fill factor and accuracy requirements of the stator 100, which is beneficial to improving the efficiency of the motor and can reduce production costs and increase production efficiency.

[0076] According to the stator 100 of this utility model embodiment, the stator winding 2 includes multiple coil units 21, which are inserted into two stator slots 13. Multiple coil units 21 are located in the same stator slot 13 and connected to different branches of the stator winding 2. This helps to reduce the induced voltage difference between different branches of the same phase in the stator winding 2, thereby avoiding circulating current between different branches of the same phase in the stator winding 2. This reduces the additional losses of the stator winding 2 and improves the working efficiency of the motor.

[0077] In some embodiments of this utility model, as shown in Figures 2 and 12, each coil unit 21 includes at least one conductor segment 22 located in a stator slot 13. In the same stator slot 13, multiple conductor segments 22 of multiple coil units 21 are arranged along the radial direction of the stator core 1, so that multiple coil units 21 are arranged neatly in the stator slot 13, which can meet the winding requirements of the stator winding 2 on the stator core 1.

[0078] According to some embodiments of this utility model, as shown in Figures 9 and 10, in the same stator slot 13, two adjacent conductor segments 22 are located in two different coil units 21, which can better reduce the induced voltage difference between different branches of the same phase of the stator winding 2, avoid circulating current between different branches of the same phase of the stator winding 2, thereby further reducing the additional losses of the stator winding 2 and improving the working efficiency of the motor.

[0079] In some embodiments, as shown in Figures 5-10 and 15-18, all the conductor segments 22 of the coil unit 21 located in one of the stator slots 13 are constructed as a first slot 213, and all the conductor segments 22 of the coil unit 21 located in the other stator slot 13 are constructed as a second slot 214. The two ends of the conductor segments 22 of the coil unit 21 located in the two stator slots 13 are connected by a first end 217 and a second end 218, respectively, thereby forming a connected coil unit 21. The structure of the coil unit 21 is simple and easy to process and manufacture.

[0080] In some embodiments, as shown in Figures 5-10 and 15-18, the coil unit 21 has multiple (two or more) conductor segments 22 located in a stator slot 13. The two adjacent conductor segments 22 of the first slot 213 have a space between them in the radial direction of the stator core 1. The conductor segments 22 of the second slot 214 of the adjacent coil unit 21 can be inserted from the space, so that the two adjacent coil units 21 intersect each other in the circumferential direction. In some cases, at least two coil units 21 can pass through the space and intersect with a coil unit 21 in sequence, so that more coil units 21 are arranged in the circumferential direction of the stator winding 2, for example, forming a cylindrical stator winding 2.

[0081] In some embodiments of this utility model, as shown in Figures 5-8, each coil unit 21 includes at least one conductor segment 22 located in a stator slot 13, and the number of conductor segments 22 passing through the same coil unit 21 in the two stator slots 13 is the same; or, as shown in Figures 15-18, the number of conductor segments 22 passing through the same coil unit 21 in the two stator slots 13 is different. Both can be set according to the actual situation, which can realize the flexibility of stator winding 2 design, increase the selectivity of cell winding, and meet different design requirements.

[0082] For example, when the number of conductor segments 22 passing through the same coil unit 21 in two stator slots 13 is the same, an even-numbered layer motor structure can be realized; when the number of conductor segments 22 passing through the same coil unit 21 in two stator slots 13 differs by 1, an odd-numbered layer motor structure can be realized, making the stator winding 2 design more flexible.

[0083] According to some embodiments of the present invention, as shown in Figures 4-10 and 14-18, multiple coil units 21 are divided into multiple groups. Each group of coil units 21 includes a first coil unit 41 and a second coil unit 42. The two stator slots 13 through which the second coil unit 42 of the same group passes are located between the two stator slots 13 through which the first coil unit 41 passes. This enables the combination of two coil units 21 with different spans in each group of coil units 21, meets the required winding requirements, and makes winding convenient and neat.

[0084] It should be noted that "span" refers to the difference between two stator slot numbers. For example, if the span between two stator slots is 7, and one end of the first coil unit 41 is inserted into the first stator slot, then the other end is inserted into the eighth stator slot. The initial stator slot into which it is inserted is the first stator slot. The explanation of "span" will continue to be used here below. In addition, since the stator core 1 is circumferential, in a 48-slot motor, the first stator slot and the 48th stator slot are arranged adjacent to each other.

[0085] In some embodiments, the first coil unit 41 and the second coil unit 42 can be connected to the same branch of the stator winding 2, or the first coil unit 41 and the second coil unit 42 can be connected to different branches of the stator winding 2, which can be set according to the actual situation to meet the different winding requirements of the stator winding 2.

[0086] In some embodiments of this utility model, as shown in Figures 9, 10 and 22, the span of the first coil unit 41 is N, and the span of the second coil unit 42 is N-2, so that the stator slot 13 through which the first coil unit 41 and the stator slot 13 through which the second coil unit 42 are located on the same side of the same group are adjacent, which can realize the required winding requirements and facilitate assembly, making winding convenient and neat.

[0087] According to some embodiments of the present invention, as shown in FIG22, each group of coil units 21 also includes a third coil unit 43. The two stator slots 13 through which the third coil unit 43 of the same group passes are located between the two stator slots 13 through which the second coil unit 42 passes. This enables the combination of three coil units 21 with different spans in each group of coil units 21, which meets the required winding requirements and makes winding convenient and neat.

[0088] In some embodiments, the first coil unit 41, the second coil unit 42, and the third coil unit 43 can be connected to the same branch of the stator winding 2, or the first coil unit 41, the second coil unit 42, and the third coil unit 43 can be connected to different branches of the stator winding 2, or two of the first coil unit 41, the second coil unit 42, and the third coil unit 43 can be connected to the same branch of the stator winding 2. This can be configured according to actual conditions to meet different winding requirements of the stator winding 2.

[0089] In some embodiments of this utility model, as shown in FIG22, the span of the third coil unit 43 is N-4, such that the stator slots 13 through which the first coil unit 41, the second coil unit 42, and the third coil unit 43, located on the same side of the same group, are arranged adjacent to each other in sequence. This can meet the required winding requirements and facilitate assembly, making winding convenient and neat. For example, FIG22 shows one arrangement of the first coil unit 41, the second coil unit 42, and the third coil unit 43 with 3 slots per pole per phase in the stator 100.

[0090] According to some embodiments of the present invention, as shown in FIG23, each group of coil units 21 further includes a third coil unit 43. The third coil unit 43 and the second coil unit 42 have the same span. The two stator slots 13 through which the third coil unit 43 of the same group passes are located between the two stator slots 13 through which the first coil unit 41 passes. This enables the combination of three coil units 21 with different spans in each group of coil units 21, meets the required winding requirements, and makes winding convenient and neat.

[0091] In some embodiments of this utility model, as shown in FIG23, the span of the first coil unit 41 is N, and the span of the second coil unit 42 and the third coil unit 43 is N-3. This arrangement ensures that the stator slots 13 through which the first coil unit 41, the third coil unit 43, and the second coil unit 42, located on one side of the same group, are arranged adjacent to each other. The stator slot 13 through which the second coil unit 42, located on the other side of the same group, is situated between the stator slots 13 through which the first coil unit 41 and the third coil unit 43, thus fulfilling the required winding requirements and facilitating assembly, resulting in convenient and neat winding. For example, FIG23 shows another arrangement of the first coil unit 41, the second coil unit 42, and the third coil unit 43 with 3 slots per pole per phase in the stator 100.

[0092] According to some embodiments of the present invention, as shown in FIG24, each group of coil units 21 further includes a third coil unit 43. The third coil unit 43 and the first coil unit 41 have the same span. The two stator slots 13 through which the second coil unit 42 of the same group passes are located between the two stator slots 13 through which the third coil unit 43 passes. This enables the combination of three coil units 21 with different spans in each group of coil units 21, which meets the required winding requirements and makes winding convenient and neat.

[0093] In some embodiments of this utility model, as shown in FIG24, the span between the first coil unit 41 and the third coil unit 43 is N, and the span between the second coil unit 42 is N-3. This arrangement ensures that the stator slots 13 through which the third coil unit 43, the first coil unit 41, and the second coil unit 42 pass are sequentially arranged adjacent to each other. The stator slots 13 through which the third coil unit 43 passes on the other side of the same group are located between the stator slots 13 through which the first coil unit 41 and the second coil unit 42 pass. This arrangement fulfills the required winding requirements and facilitates assembly, resulting in convenient and neat winding. For example, FIG24 shows another arrangement of the first coil unit 41, the second coil unit 42, and the third coil unit 43 with 3 slots per pole per phase in the stator 100.

[0094] According to some embodiments of the present invention, as shown in Figures 4-10, 15-18, and 22-24, the two ends of the second coil unit 42 in the same group along the axial direction of the stator core 1 are located between the two ends of the first coil unit 41 along the axial direction of the stator core 1, making the structure of each group of coil units 21 compact, reducing the space occupied, reducing the use of materials, and reducing production costs.

[0095] In some embodiments, the coil unit 21 is formed by connecting multiple (two or more) U-shaped hairpins. The U-shaped hairpins have a simple structure, are easy to process and manufacture, and can reduce production costs.

[0096] The inventors of this application have discovered that since multiple U-shaped hairpins need to be connected by welding to each other, the number of welding points of the stator winding 2 is proportional to the product of the number of slots and the number of layers. When the number of slots and the number of layers increase, the number of welding points of the stator winding 2 also increases, which increases the difficulty of motor manufacturing.

[0097] Therefore, in some embodiments of this utility model, as shown in Figures 5-8 and 15-18, at least one coil unit 21 is formed by continuous winding of a wire, making the coil unit 21 approximately a concentric coil. Thus, when the number of layers in the stator winding 2 increases, only one wire needs to be wound to produce more turns. This ensures that regardless of whether the number of layers in the stator winding 2 increases or decreases, the coil unit 21 always has only two welding points. The coil unit 21 is connected to other coil units 21 through these two welding points, reducing the number of welding points on the coil unit 21 and consequently reducing the number of connection points in the stator winding 2. This effectively improves the manufacturing efficiency and reliability of the stator winding 2, and is beneficial for improving the working efficiency of the motor. For example, as shown in Figure 10, there can be only two coil units 21 within the same stator slot 13.

[0098] In some embodiments, as shown in Figures 5-8 and 15-18, the conductor can be a flat wire. The rectangular cross-section of the flat wire can fill the stator slot 13 more tightly, which is beneficial to improving the slot fill factor and thus facilitating the improvement of motor efficiency.

[0099] According to some embodiments of the present invention, as shown in Figures 5-8 and 15-18, the two ends of the coil unit 21 have a first welding part 211 and a second welding part 212. The coil unit 21 can be connected to other coil units 21 through the first welding part 211 and the second welding part 212 to meet the required connection requirements.

[0100] Furthermore, as shown in Figures 1, 3, and 4, the first welding part 211 and the second welding part 212 extend along the radial direction of the stator core 1, which can reduce the space occupied at both ends of the stator core 1 in the axial direction, thereby reducing the space occupied by the stator 100 and facilitating the miniaturization design of the motor.

[0101] In some embodiments of this utility model, as shown in Figures 1, 2, 11, and 12, an insulating element 31 is provided on the inner wall of the stator slot 13. Multiple insulating elements 31 can constitute an insulating assembly 3. The insulating element 31 can insulate the coil unit 21 passing through the stator slot 13 and the stator core 1, avoiding short circuits and other problems, meeting the required insulation requirements, and ensuring safety. For example, the insulating element 31 can be insulating paper, etc.

[0102] In some embodiments, the insulating component 31 can be formed by means of mold forming or machining, which can meet different processing and manufacturing requirements of the insulating component 31.

[0103] According to some embodiments of the present invention, as shown in Figures 19-21, the stator core 1 includes a stator yoke 11 and stator teeth 12. The stator yoke 11 is circular in shape, and there are multiple stator teeth 12 (two or more). The multiple stator teeth 12 are spaced apart along the circumferential direction of the stator yoke 11, and the stator teeth 12 are connected to the stator yoke 11. A stator slot 13 is formed between two adjacent stator teeth 12, and the stator winding 2 passes through the stator slot 13, which can realize the winding requirements of the stator winding 2 on the stator core 1. The structure of the stator core 1 is simple, easy to process and manufacture, and conducive to reducing production costs.

[0104] Furthermore, as shown in Figures 19-21, the stator teeth 12 and the stator yoke 11 are detachably connected, meaning that the stator yoke 11 and the stator teeth 12 can be manufactured separately, which can reduce processing difficulty and cost, while improving processing accuracy. In addition, the assembly between the stator core 1 and the stator winding 2 is more flexible and can meet different assembly requirements.

[0105] For example, the stator core 1 can be obtained by first assembling the stator yoke 11 and the stator teeth 12, and then the stator winding 2 can be wound around the stator core 1 to assemble the stator 100; or, the stator teeth 12 can be inserted into the stator winding 2, and then the stator yoke 11 and the stator teeth 12 can be assembled to assemble the stator 100. This can avoid the problem of reserving a gap to meet the wire insertion requirements of the stator winding in related technologies, reduce the reserved distance, thereby increase the size of the coil unit 21, which is beneficial to improving the slot fill factor of the motor.

[0106] In some embodiments, as shown in FIG21, the stator tooth 12 includes a tooth body 122 and a tooth tip 123. One end of the tooth body 122 in the width direction is connected to the tooth tip 123, and the other end of the tooth body 122 in the width direction is detachably connected to the stator yoke 11. Along the circumferential direction of the stator yoke 11, at least one end of the stator tooth 12 protrudes from the end face of the tooth body 122 on the same side. The tooth tip 123 can block the coil unit 21 located in the stator slot 13, preventing the coil unit 21 from coming out of the stator slot 13, ensuring that the stator winding 2 is reliably fixed on the stator core 1. The structure of the stator tooth 12 is simple and easy to process and manufacture.

[0107] In some embodiments, as shown in Figures 19 and 21, the two end faces of the tooth body 122 in the thickness direction are parallel to each other, that is, the outer contour of the cross section of the tooth body 122 along the direction perpendicular to the axial direction of the stator yoke 11 can be roughly formed into a rectangle, which facilitates the processing and manufacturing of the tooth body 122 and ensures that the stator slots 13 defined by two adjacent stator teeth 12 are consistent, which facilitates the winding of the coil unit 21 in the stator slot 13.

[0108] In some embodiments of this utility model, as shown in Figures 20 and 21, the inner peripheral wall of the stator yoke 11 is provided with a plurality of toothed grooves 111, and the plurality of toothed grooves 111 correspond one-to-one with a plurality of stator teeth 12. The plurality of toothed grooves 111 are arranged at intervals along the circumferential direction of the stator yoke 11, and the plurality of stator teeth 12 are respectively inserted into the plurality of toothed grooves 111, which can realize the connection requirements of the plurality of stator teeth 12 and the stator yoke 11, ensure reliable connection, facilitate assembly, and improve assembly efficiency.

[0109] In some embodiments, as shown in Figures 19-21, the tooth groove 111 extends through the stator yoke 11 along the axial direction of the stator yoke 11. At least one sidewall of the tooth groove 111 is provided with a limiting rib 112 extending along the axial direction of the stator yoke 11. The stator tooth 12 is formed with a limiting groove 121 that cooperates with the limiting rib 112. Both ends of the limiting groove 121 extend to the ends of the stator tooth 12 along its length. When the stator tooth 12 is engaged with the stator yoke 11, the engagement of the limiting rib 112 and the limiting groove 121 can prevent the stator tooth 12 from dislodging from the stator yoke 11, ensuring a reliable connection between the stator tooth 12 and the stator yoke 11. Furthermore, the structure of the limiting rib 112 and the limiting groove 121 is simple and easy to manufacture.

[0110] For example, when the stator teeth 12 and the stator yoke 11 are engaged, a portion of the stator teeth 12 is inserted into the stator winding 2 along the radial direction of the stator yoke 11, and the stator yoke 11 engages with the stator teeth 12 along the axial direction, so that the stator teeth 12 and the stator winding 2 are assembled in the stator yoke 11, thereby enabling the assembly of the stator 100.

[0111] The motor according to an embodiment of the present invention includes a stator 100 according to an embodiment of the present invention. Since the stator 100 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the motor according to an embodiment of the present invention, by having a stator winding 2 including a plurality of coil units 21, the coil units 21 passing through two stator slots 13, and having a plurality of coil units 21 in the same stator slot 13, and the plurality of coil units 21 in the same stator slot 13 being connected to different branches of the stator winding 2, is beneficial to reducing the induced voltage difference between different branches of the same phase in the stator winding 2, thereby avoiding circulating current between different branches of the same phase in the stator winding 2, thus reducing the additional losses of the stator winding 2 and improving the working efficiency of the motor.

[0112] The powertrain according to an embodiment of the present invention includes a transmission mechanism and a motor according to an embodiment of the present invention. The motor is connected to the transmission mechanism in a transmission manner, and the motor can drive the transmission mechanism to move, providing the required power source.

[0113] Since the powertrain according to the present invention has the above-mentioned beneficial technical effects, the vehicle according to the present invention, through the stator winding 2 including multiple coil units 21, the coil units 21 passing through two stator slots 13, having multiple coil units 21 in the same stator slot 13, and the multiple coil units 21 in the same stator slot 13 being connected to different branches of the stator winding 2, is beneficial to reducing the induced voltage difference between different branches of the same phase of the stator winding 2, thereby avoiding the generation of circulating current between different branches of the same phase of the stator winding 2, thereby reducing the additional losses of the stator winding 2 and improving the working efficiency of the motor.

[0114] The vehicle according to the present invention includes a powertrain according to the present invention. Since the powertrain according to the present invention has the aforementioned beneficial technical effects, the vehicle according to the present invention, by having a stator winding 2 including a plurality of coil units 21, the coil units 21 passing through two stator slots 13, and having a plurality of coil units 21 in the same stator slot 13, and the plurality of coil units 21 in the same stator slot 13 being connected to different branches of the stator winding 2, helps to reduce the induced voltage difference between different branches of the same phase in the stator winding 2, thereby avoiding circulating current between different branches of the same phase in the stator winding 2, thus reducing additional losses in the stator winding 2 and improving the working efficiency of the motor.

[0115] The stator 100, motor, powertrain, and other components and operations of the vehicle according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0116] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0117] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0118] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator, characterized in that, include: Stator core (1), the stator core (1) having a plurality of stator slots (13) spaced apart along the circumferential direction of the stator core (1); stator winding (2), the stator winding (2) including a plurality of coil units (21), the coil units (21) passing through two of the stator slots (13), having a plurality of coil units (21) in the same stator slot (13), and the plurality of coil units (21) in the same stator slot (13) being connected to different branches of the stator winding (2).

2. The stator according to claim 1, characterized in that, Each of the coil units (21) includes at least one conductor segment (22) located in one of the stator slots (13), and multiple conductor segments (22) of multiple coil units (21) are arranged in the radial direction of the stator core (1) within the same stator slot (13).

3. The stator according to claim 2, characterized in that, Within the same stator slot (13), two adjacent conductor segments (22) are located in two different coil units (21).

4. The stator according to claim 1, characterized in that, Each coil unit (21) includes at least one conductor segment (22) located in one of the stator slots (13), and the number of conductor segments (22) passing through two stator slots (13) of the same coil unit (21) may be the same or different.

5. The stator according to claim 1, characterized in that, The multiple coil units (21) are divided into multiple groups. Each group of coil units (21) includes a first coil unit (41) and a second coil unit (42). The two stator slots (13) through which the second coil unit (42) of the same group passes are located between the two stator slots (13) through which the first coil unit (41) passes.

6. The stator according to claim 5, characterized in that, The span of the first coil unit (41) is N, and the span of the second coil unit (42) is N-2.

7. The stator according to claim 5 or 6, characterized in that, Each group of coil units (21) also includes a third coil unit (43), and the two stator slots (13) through which the third coil unit (43) of the same group passes are located between the two stator slots (13) through which the second coil unit (42) passes.

8. The stator according to claim 7, characterized in that, The span of the third coil unit (43) is N-4.

9. The stator according to claim 5, characterized in that, Each group of coil units (21) also includes a third coil unit (43), the third coil unit (43) and the second coil unit (42) have the same span, and the two stator slots (13) through which the third coil unit (43) of the same group passes are located between the two stator slots (13) through which the first coil unit (41) passes.

10. The stator according to claim 9, characterized in that, The span of the first coil unit (41) is N, and the span of the second coil unit (42) and the third coil unit (43) is N-3.

11. The stator according to claim 5, characterized in that, Each group of coil units (21) also includes a third coil unit (43), the third coil unit (43) and the first coil unit (41) have the same span, and the two stator slots (13) through which the second coil unit (42) of the same group passes are located between the two stator slots (13) through which the third coil unit (43) passes.

12. The stator according to claim 11, characterized in that, The span between the first coil unit (41) and the third coil unit (43) is N, and the span between the second coil unit (42) is N-3.

13. The stator according to claim 5, characterized in that, The two ends of the second coil unit (42) in the same group along the axial direction of the stator core (1) are located between the two ends of the first coil unit (41) along the axial direction of the stator core (1).

14. The stator according to claim 1, characterized in that, At least one of the coil units (21) is formed by continuous winding of wire; or, the coil unit (21) is formed by connecting a plurality of U-shaped hairpins.

15. The stator according to claim 1, characterized in that, The coil unit (21) has a first welded portion (211) and a second welded portion (212) at both ends, and the first welded portion (211) and the second welded portion (212) extend along the radial direction of the stator core (1).

16. The stator according to claim 1, characterized in that, An insulating element (31) is provided on the inner wall of the stator slot (13).

17. The stator according to claim 1, characterized in that, The stator core (1) includes: a stator yoke (11), which is annular in shape; and stator teeth (12), which are a plurality of teeth spaced apart along the circumferential direction of the stator yoke (11) and detachably connected to the stator yoke (11). A stator slot (13) is formed between two adjacent stator teeth (12), and the stator winding (2) passes through the stator slot (13).

18. The stator according to claim 17, characterized in that, The inner peripheral wall of the stator yoke (11) is provided with a plurality of tooth grooves (111) corresponding one-to-one with the plurality of stator teeth (12). The plurality of tooth grooves (111) are arranged at intervals along the circumferential direction of the stator yoke (11), and the plurality of stator teeth (12) are respectively inserted into the plurality of tooth grooves (111).

19. An electric motor, characterized in that, Includes the stator (100) according to any one of claims 1-18.

20. A powertrain, characterized in that, include: A transmission mechanism; the motor according to claim 19, wherein the motor is connected to the transmission mechanism in a transmission connection.

21. A vehicle, characterized in that, Including the powertrain according to claim 20.

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