Stator assembly, electric machine and vehicle

Abstract

The application discloses a kind of stator assembly, motor and vehicle, the stator assembly includes: stator, the stator is formed with the multiple stator slots arranged along the circumference, each stator slot has the M slot layers arranged along the radial direction of the stator;Winding, the winding includes first item winding, second item winding and third item winding, the first item winding, the second item winding and the third item winding are arranged in parallel with each other in the circumference direction.According to the stator assembly of the application, by setting the stator and the winding, each winding segment in the winding is arranged on the stator at regular interval distance, so that the winding can be arranged symmetrically on the stator, thereby improving the working performance of the winding, and improving the mass production feasibility of the winding.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to a stator assembly, an electric motor, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicle technology, the performance requirements for drive motors are becoming increasingly stringent. Currently, new energy vehicle companies are investing heavily in the research and development of core technologies for electric drive systems, and flat wire motors, as one of the key technologies for future electric drive technology, are inevitably a key technical challenge that needs to be overcome. Among these, high-power, high-efficiency 8-pole 48-slot flat wire motor windings are currently a key area of ​​development.

[0003] The patent with publication number CN209233596U, entitled "A Motor Winding and a Motor Stator," proposes a method of using M first hairpin coils arranged concentrically, with N units in each first segmented coil group. The first segmented coil units are arranged sequentially along the circumference, and the portion within the N×M slots is distributed in two layers along the radial direction to reduce the complexity of the winding manufacturing process. However, the structural feature of the first hairpin coil extending along the axis in this patent results in a large overall volume and heavy weight for the motor winding.

[0004] The patent with publication number CN113809857A, entitled "A Multi-Layer Hairpin Flat Wire Winding, Stator, and Motor," arranges the three-phase stator slots of the hairpin flat wire wave winding in pairs, separated by a sequence. Any branch, after traversing half the layers in a circular path, is transposed to the equivalent slot of an adjacent stator slot. Long-pitch or short-pitch connections are used when transposing to the equivalent slot of an adjacent stator slot across layers. This ensures that the beginning and end of any branch are located in the innermost and outermost layers along the stator radial direction. While this solves the problem of complex stator structure and high manufacturing difficulty in flat wire motor windings to some extent, the winding in this patent still suffers from branch imbalance, which can easily lead to circulating current in the high torque range of the motor, causing motor losses.

[0005] The patent with publication number CN110289718A, entitled "A Novel Winding Motor Stator," proposes to form layers 1 to 2n in the stator slots of the stator core along the radial direction of the stator core, arranged sequentially from the inside to the outside, where n is a natural number. This allows the two effective straight segments of each hairpin to be placed in the odd and even layers of different stator slots, thereby forming multiple branches with the hairpins and hairpins. This increases the number of branches and improves the performance of the motor. However, the complex branch structure in this patent is not conducive to the mass production of the windings.

[0006] In related technologies, the 8-pole 48-slot flat wire motor winding has a branch imbalance problem, which causes the motor to have a circulating current phenomenon in the high torque range, resulting in motor loss and reduced motor efficiency. Moreover, due to the diverse and complex branch circuits of the flat wire motor winding, its manufacturing is difficult, resulting in poor feasibility for mass production. Summary of the Invention

[0007] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a stator assembly. The stator assembly according to this invention, by setting up a stator and windings, arranges the winding segments on the stator at regular intervals, enabling the windings to be symmetrically arranged on the stator, thereby improving the working performance of the windings and enhancing the feasibility of mass production of the windings.

[0008] The present invention also proposes a motor including the above-described stator assembly.

[0009] The present invention also proposes a vehicle including the above-mentioned motor.

[0010] The stator assembly according to the present invention includes: a stator having a plurality of stator slots arranged circumferentially thereon, each stator slot having M slot layers arranged radially along the stator; and a winding including a first winding, a second winding, and a third winding, the first winding, the second winding, and the third winding being arranged parallel to each other in the circumferential direction; wherein the first winding, the second winding, and the third winding each include at least two windings connected in parallel; wherein the first winding includes a plurality of winding segments connected sequentially to each other, and the windings located in two adjacent slot layers include: the first winding segment and the second winding segment being connected sequentially and located in the Lth layer and the L+1th layer, with a spacing of X stator slots between the first winding segment and the second winding segment; the second winding segment and the third winding segment being connected sequentially and located in the Lth layer and the L+1th layer, with a spacing of X- between the second winding segment and the third winding segment. 1 or X+1 stator slots; the third winding segment and the fourth winding segment are sequentially connected and located in the Lth and L+1th layers, with an interval of X stator slots between them; the fourth winding segment and the fifth winding segment are sequentially connected and located in the Lth and L+1th layers, with an interval of X+1 or X-1 stator slots between them; the fifth winding segment and the sixth winding segment are sequentially connected and located in the Lth layer. Within the L+1 layer, the fifth winding segment and the sixth winding segment are spaced apart by X stator slots; the sixth winding segment and the seventh winding segment are sequentially connected and located within the L and L+1 layers, with a spaced apart by X-1 or X+1 stator slots; the seventh winding segment and the eighth winding segment are sequentially connected and located within the L and L+1 layers, with a spaced apart by X stator slots.

[0011] According to one embodiment of the present invention, the multi-path winding includes a second path winding. The second path winding has the same direction as the first path winding and is located in adjacent stator slots. The second path winding has multiple winding segments connected sequentially to each other. The winding located in two adjacent slot layers includes: a first winding segment connected sequentially to the second winding segment and located in the Lth layer and the (L+1)th layer, with a spacing of X stator slots between the first winding segment and the second winding segment; a second winding segment connected sequentially to the third winding segment and located in the Lth layer and the (L+1)th layer, with a spacing of X+1 or X-1 stator slots between the second winding segment and the third winding segment; and a third winding segment connected sequentially to the fourth winding segment and located in the Lth layer and the (L+1)th layer, with a spacing of X+1 or X-1 stator slots between the second winding segment and the third winding segment. The four winding segments are spaced apart by X stator slots; the fourth winding segment is sequentially connected to the fifth winding segment and located in the Lth and L+1th layers, with a spaced apart by X-1 or X+1 stator slots; the fifth winding segment is sequentially connected to the sixth winding segment and located in the Lth and L+1th layers, with a spaced apart by X stator slots; the sixth winding segment is sequentially connected to the seventh winding segment and located in the Lth and L+1th layers, with a spaced apart by X+1 or X-1 stator slots; the seventh winding segment is sequentially connected to the eighth winding segment and located in the Lth and L+1th layers, with a spaced apart by X stator slots.

[0012] According to one embodiment of the present invention, the multi-path winding includes a third path winding, the third path winding having the opposite winding direction to the first path winding, the third path winding having a plurality of winding segments connected sequentially to each other, the winding located in two adjacent slot layers including: a first winding segment connected sequentially to a second winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots between the first winding segment and the second winding segment; a second winding segment connected sequentially to the third winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X+1 or X-1 stator slots between the second winding segment and the third winding segment; a third winding segment connected sequentially to a fourth winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X+1 or X-1 stator slots between the third winding segment and the fourth winding segment. The fourth winding segment is connected to the fifth winding segment in sequence and located in adjacent layers M and M-1, with a spacing of X-1 or X+1 stator slots between them; the fifth winding segment is connected to the sixth winding segment in sequence and located in adjacent layers M and M-1, with a spacing of X stator slots between them; the sixth winding segment is connected to the seventh winding segment in sequence and located in adjacent layers M and M-1, with a spacing of X+1 or X-1 stator slots between them; the seventh winding segment is connected to the eighth winding segment in sequence and located in adjacent layers M and M-1, with a spacing of X stator slots between them.

[0013] According to one embodiment of the present invention, the multi-path winding includes a fourth path winding, the fourth path winding having the opposite winding direction to the first path winding and located in a stator slot adjacent to the third path winding. The fourth path winding has multiple winding segments connected sequentially to each other. The winding located in two adjacent slot layers includes: a first winding segment connected sequentially to a second winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots between the first and second winding segments; a second winding segment connected sequentially to the third winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X-1 or X+1 stator slots between the second and third winding segments; and a third winding segment connected sequentially to the fourth winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X-1 or X+1 stator slots between the third and fourth winding segments. The fourth winding segment is spaced X stator slots apart; the fourth winding segment and the fifth winding segment are sequentially connected and located in adjacent layers M and M-1, with a space of X+1 or X-1 stator slots between them; the fifth winding segment and the sixth winding segment are sequentially connected and located in adjacent layers M and M-1, with a space of X stator slots between them; the sixth winding segment and the seventh winding segment are sequentially connected and located in adjacent layers M and M-1, with a space of X-1 or X+1 stator slots between them; the seventh winding segment and the eighth winding segment are sequentially connected and located in adjacent layers M and M-1, with a space of X stator slots between them.

[0014] According to one embodiment of the present invention, the winding segment located at the end of the Lth layer and / or the L+1th layer is spaced apart by X stator slots from the adjacent winding segment located in the L+2th layer.

[0015] According to one embodiment of the present invention, the first winding, the second winding and the third winding each include K windings connected in parallel with each other, and the number of stator slots is N and satisfies: N = 3 * K * M / 2.

[0016] According to one embodiment of the present invention, the number of slot layers in each stator slot is M, and M≥8.

[0017] According to one embodiment of the present invention, the lead-out terminals of the first winding, the second winding, and the third winding are connected by a star-shaped connection.

[0018] According to one embodiment of the present invention, there are multiple star points, and at least two windings in the first winding, at least two windings in the second winding, and at least two windings in the third winding are connected to the same star point; at least two other windings in the first winding, at least two other windings in the second winding, and at least two other windings in the third winding are connected to another star point.

[0019] According to one embodiment of the present invention, the winding includes a plurality of U-shaped conductors, each U-shaped conductor including two slot portions, a bent portion connecting one end of the two slot portions, and a connecting portion respectively disposed at the other end of the two slot portions, the connecting portion being bent relative to the slot portion in which it is located.

[0020] The motor according to the present invention is briefly described below.

[0021] The motor according to the present invention includes the stator assembly described in any one of the above embodiments. Since the motor according to the present invention includes the stator assembly described in any one of the above embodiments, each winding in the stator assembly of the motor includes multiple winding segments spaced sequentially at intervals of X stator slots, X-1 or X+1 stator slots, X stator slots, X+1 or X-1 stator slots, X stator slots, X-1 or X+1 stator slots, and X stator slots. The arrangement of the windings in the stator assembly is more symmetrical, and the current distribution during winding operation is more balanced, thereby effectively improving motor efficiency and motor safety. Furthermore, the simple arrangement of the windings on the stator in the stator assembly is beneficial for mass production of the stator assembly, improving the economic efficiency of the motor.

[0022] The vehicle according to the present invention is briefly described below.

[0023] The vehicle according to the present invention includes the motor described in any one of the above embodiments. Since the vehicle according to the present invention includes the motor described in any one of the above embodiments, the motor in the vehicle has higher working efficiency, better working performance, higher safety, and better economic benefits, thereby improving the working performance and safety of the vehicle, saving economic costs, and providing a better user experience.

[0024] Additional aspects and advantages of the 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

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the winding star point connection according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the winding star point connection according to another embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of one end of a stator assembly according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the other end of a stator assembly according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of a U-shaped conductor according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of a type I conductor according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the first winding according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the arrangement of the first winding of an 8-layer, 48-slot structure in the stator according to an embodiment of the present invention.

[0034] Figure 9 This is a schematic diagram of the first winding path of an 8-layer, 48-slot stator slot according to an embodiment of the present invention;

[0035] Figure 10 The first detour is according to Figure 9 2D winding diagram of the schematic layout;

[0036] Figure 11 This is a schematic diagram of the second winding of an 8-layer, 48-slot stator corresponding to a stator slot according to an embodiment of the present invention;

[0037] Figure 12 It is the second detour according to Figure 11 2D winding diagram of the schematic layout;

[0038] Figure 13 This is a schematic diagram of the third winding corresponding to the stator slots of an 8-layer, 48-slot structure according to an embodiment of the present invention;

[0039] Figure 14 It is the third detour according to Figure 13 2D winding diagram of the schematic layout;

[0040] Figure 15 This is a schematic diagram of the fourth winding corresponding to the stator slot in an 8-layer, 48-slot configuration according to an embodiment of the present invention.

[0041] Figure 16 It is the fourth detour according to Figure 15 The diagram shows the 2D winding layout.

[0042] Figure label:

[0043] Stator assembly 1;

[0044] Stator 11, stator slot 111;

[0045] Winding 12, first winding 121, first winding 1211, first winding segment 12111, second winding 1212, third winding 1213, fourth winding 1214, second winding 122, third winding 123.

[0046] U-shaped conductor 124, groove portion 1241, bending portion 1242, connecting portion 1243, I-shaped conductor 125, groove portion 1251 of I-shaped conductor, connecting portion 1252 of I-shaped conductor. Detailed Implementation

[0047] Embodiments of the present invention 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 the present invention, and should not be construed as limiting the present invention.

[0048] With the rapid development of new energy vehicle technology, the performance requirements for drive motors are becoming increasingly stringent. Currently, new energy vehicle companies are investing heavily in the research and development of core technologies for electric drive systems, and flat wire motors, as one of the key technologies for future electric drive technology, are inevitably a key technical challenge that needs to be overcome. Among these, high-power, high-efficiency 8-pole 48-slot flat wire motor windings are currently a key area of ​​development.

[0049] In related technologies, the 8-pole 48-slot flat wire motor winding has a branch imbalance problem, which causes the motor to have a circulating current phenomenon in the high torque range, resulting in motor loss and reduced motor efficiency. Moreover, due to the diverse and complex branch circuits of the flat wire motor winding, its manufacturing is difficult, resulting in poor feasibility for mass production.

[0050] The following is for reference. Figures 1-16 A stator assembly 1 according to an embodiment of the present invention is described.

[0051] like Figures 1-8As shown, the stator assembly 1 according to the present invention includes a stator 11 and a winding 12. In this invention, the stator 11 can be used to embed the winding 12 to achieve the fixing and installation of the winding 12, and the stator 11 can form a complete magnetic circuit together with some other components of the stator assembly 1 to achieve normal operation of the stator assembly 1. The stator 11 has a plurality of stator slots 111 arranged circumferentially, which are suitable for cooperating with the winding 12. Each stator slot 111 has M slot layers arranged radially along the stator 11, where M is a positive integer. In this invention, the winding 12 can be used to pass current and generate an induced electromotive force to achieve energy conversion of the stator assembly 1, thereby achieving normal operation of the stator assembly 1. The winding 12 includes a first winding 121, a second winding 122, and a third winding 123, which are arranged parallel to each other in the circumferential direction.

[0052] In this invention, the first winding 121, the second winding 122, and the third winding 123 each include at least two windings connected in parallel. Among these multiple windings, the first winding 1211 has multiple winding segments connected sequentially to each other. The windings located in two adjacent slot layers include: a first winding segment 12111 and a second winding segment connected sequentially and located in layers L and L+1, with a spacing of X stator slots 111 between them; a second winding segment and a third winding segment connected sequentially and located in layers L and L+1, with a spacing of X-1 or X+1 stator slots 111 between them; a third winding segment and a fourth winding segment connected sequentially and located in layers L and L+1, with a spacing of X stator slots 111 between them; the fourth... The fourth and fifth winding segments are sequentially connected and located within layers L and L+1, with a spacing of X+1 or X-1 stator slots 111 between them; the fifth and sixth winding segments are sequentially connected and located within layers L and L+1, with a spacing of X stator slots 111 between them; the sixth and seventh winding segments are sequentially connected and located within layers L and L+1, with a spacing of X-1 or X+1 stator slots 111 between them; the seventh and eighth winding segments are sequentially connected and located within layers L and L+1, with a spacing of X stator slots 111 between them. Here, X and L represent any positive integer.

[0053] This invention, by setting a stator 11 and windings 12, arranges the first winding 121, the second winding 122, and the third winding 123 parallel to each other in the circumferential direction, and respectively mates the first winding 121, the second winding 122, and the third winding 123 with multiple stator slots 111 on the stator 11, so that multiple winding segments in the multiple windings of each of the first winding 121, the second winding 122, and the third winding 123 can be sequentially spaced at intervals of X stator slots 111, X-1 or X+1 stator slots 111, X stator slots 111, X+1 or X-1 stator slots 111, X stator slots 111, X-1 or X+1 stator slots 111. 11. X stator slots 111 are arranged on the stator 11. Thus, the present invention limits the spacing between multiple winding segments by limiting the number of stator slots 111 between multiple winding segments, thereby achieving a symmetrical arrangement of the windings 12 on the stator 11. Compared with related technologies, where the windings 12 have branch imbalance problems, which can lead to circulating current and reduce motor efficiency, the arrangement of multiple winding segments of the windings 12 on the stator 11 in the present invention is more symmetrical and reasonable, thereby effectively improving motor efficiency and motor safety. At the same time, due to the reasonable and regular arrangement of the windings 12, the stator assembly 1 in the present invention has better feasibility for mass production and better economic benefits.

[0054] According to one embodiment of the present invention, the multi-path winding includes a second path winding 1212, which is in the same direction as the first path winding 1211 and located in adjacent stator slots 111. The fact that the second path winding 1212 is in the same direction as the first path winding 1211 means that the direction of current flow in the second path winding 1212 is the same as that in the first path winding 1211. The second winding 1212 has multiple winding segments connected sequentially to each other. The windings located in two adjacent slot layers include: a first winding segment 12111 connected sequentially to a second winding segment and located in the Lth and L+1th layers, with a spacing of X stator slots 111 between the first and second winding segments; a second winding segment connected sequentially to a third winding segment and located in the Lth and L+1th layers, with a spacing of X+1 or X-1 stator slots 111 between the second and third winding segments; a third winding segment connected sequentially to a fourth winding segment and located in the Lth and L+1th layers, with a spacing of X stator slots 111 between the third and fourth winding segments; and a fourth winding segment connected sequentially to a fifth winding segment and located in the Lth and L+1th layers. Within layer 1, the fourth winding segment and the fifth winding segment are separated by X-1 or X+1 stator slots 111; the fifth winding segment and the sixth winding segment are connected sequentially and located within layers L and L+1, with a spacing of X stator slots 111 between them; the sixth winding segment and the seventh winding segment are connected sequentially and located within layers L and L+1, with a spacing of X+1 or X-1 stator slots 111 between them; the seventh winding segment and the eighth winding segment are connected sequentially and located within layers L and L+1, with a spacing of X stator slots 111 between them. That is, multiple winding segments of the second winding 1212 are adjacent to and parallel to multiple winding segments of the first winding 1211.

[0055] According to one embodiment of the present invention, the multi-path winding includes a third path winding 1213, the winding direction of the third path winding 1213 is opposite to that of the first path winding 1211, wherein the opposite direction of the third path winding 1213 and the first path winding 1211 means that the direction of the current flowing through the third path winding 1213 and the first path winding 1211 is opposite, and the direction of the third path winding 1213 is opposite to that of the second path winding 1212 and is located in an adjacent stator slot 111. The third winding 1213 has multiple winding segments connected sequentially to each other. The windings located in two adjacent slot layers include: a first winding segment 12111 connected sequentially to a second winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the first and second winding segments; a second winding segment connected sequentially to a third winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X+1 or X-1 stator slots 111 between the second and third winding segments; a third winding segment connected sequentially to a fourth winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the third and fourth winding segments; and a fourth winding segment connected sequentially to the first winding segment connected to the second winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the third and fourth winding segments; and a fourth winding segment connected sequentially to the second winding segment connected to the third winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the fourth and fourth winding segments; and a third winding segment connected sequentially to the third winding segment connected to the second winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the fourth and fourth winding segments; and a third winding segment connected sequentially to the third winding segment connected to the second winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the fourth and fifth ... Five winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X-1 or X+1 stator slots 111 between the fourth and fifth winding segments; the fifth and sixth winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X stator slots 111 between them; the sixth and seventh winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X+1 or X-1 stator slots 111 between them; the seventh and eighth winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X stator slots 111 between them.

[0056] According to one embodiment of the present invention, the multi-path winding includes a fourth path winding 1214, the fourth path winding 1214 having the opposite winding direction to the first path winding 1211, and the fourth path winding 1214 being located in the stator slot 111 adjacent to the third path winding 1213. Similarly, the opposite direction of the fourth path winding 1214 to the first path winding 1211 means that the direction of current flow through the fourth path winding 1214 is opposite to that of the first path winding 1211. The fourth winding 1214 has multiple winding segments connected sequentially to each other. The windings located in two adjacent slot layers include: a first winding segment 12111 connected sequentially to a second winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the first and second winding segments; a second winding segment connected sequentially to a third winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X-1 or X+1 stator slots 111 between the second and third winding segments; a third winding segment connected sequentially to a fourth winding segment and located in adjacent M-th and M-1-th layers, with a spacing of X stator slots 111 between the third and fourth winding segments; and a fourth winding segment connected sequentially to the first winding segment connected to the second winding segment connected to the third winding segment connected to the fourth winding segment connected to the first winding segment connected to the second winding segment connected to the third winding segment connected to the second winding segment connected to the third winding segment connected to the fourth winding segment connected to the third winding segment connected to the fourth winding segment connected to the first winding segment connected to the second winding segment connected to the third winding segment connected to the third winding segment connected to the fourth winding segment connected to the first winding segment connected to the second winding segment connected to the third winding segment connected to the third winding segment connected to the fourth winding segment connected to the third winding segment connected to the fourth winding segment connected to the first ... Five winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X+1 or X-1 stator slots 111 between the fourth and fifth winding segments; the fifth and sixth winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X stator slots 111 between them; the sixth and seventh winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X-1 or X+1 stator slots 111 between them; the seventh and eighth winding segments are connected sequentially and located in adjacent layers M and M-1, with a spacing of X stator slots 111 between them.

[0057] According to the stator assembly 1 described above, the multi-path winding includes a first winding 1211, a second winding 1212, a third winding 1213, and a fourth winding 1214. The first winding 1211 and the second winding 1212 are in the same direction and located in adjacent stator slots 111. The second winding 1212 and the third winding 1213 are in opposite directions and located in adjacent stator slots 111. The third winding 1213 and the fourth winding 1214 are in opposite directions and located in adjacent stator slots 111. The first winding 1211, the second winding 1212, the third winding 1213, and the fourth winding... The multiple winding segments of each of 1214 are arranged in parallel, thereby achieving a symmetrical arrangement of the first winding 1211, the second winding 1212, the third winding 1213, and the fourth winding 1214 on the stator 11. When the winding 12 is working, the current distribution in the winding 12 is more balanced, resulting in higher working efficiency and better safety for the stator assembly 1. The arrangement of the first winding 1211, the second winding 1212, the third winding 1213, and the fourth winding 1214 in this invention also reduces the complexity of the winding 12, making the connection of the winding 12 simpler, thus making it easier to manufacture and improving production efficiency.

[0058] Furthermore, in some specific embodiments of the present invention, the connection method of the first winding 1211, the second winding 1212, the third winding 1213, and the fourth winding 1214 can be such that the output end of the first winding 1211 is connected to the input end of the fourth winding 1214, and the output end of the second winding 1212 is connected to the input end of the third winding 1213, so as to form a two-way connection method.

[0059] According to one embodiment of the present invention, the arrangement of the end winding segments can be such that the winding segment at the end of the Lth layer is spaced apart by X stator slots 111 with the adjacent winding segment at the L+2th layer; or the arrangement of the end winding segments can be such that the winding segment at the end of the L+1th layer is spaced apart by X stator slots 111 with the adjacent winding segment at the L+2th layer. By setting the winding segment at the end of the Lth layer and / or the L+1th layer to be spaced apart by X stator slots 111 with the adjacent winding segment at the L+2th layer, the number of stator slots 111 between the winding segment at the end of each layer and the winding segment starting from the previous layer or the winding segment starting from the next layer is X, thereby ensuring that multiple winding segments in the same winding path can be symmetrically arranged on the stator, thereby improving the working performance of the stator assembly 1 and reducing the production difficulty of the winding 12.

[0060] According to one embodiment of the present invention, the first winding 121, the second winding 122, and the third winding 123 each include K parallel windings, and the number of stator slots 111 is N, satisfying: N = 3 * K * M / 2. By setting the number of stator slots 111 to N and satisfying: N = 3 * K * M / 2, the number of stator slots 111 corresponds to the number of slot layers and the number of parallel windings, thereby enabling the windings 12 to cooperate well with the stator slots 111. This ensures that the first winding 121, the second winding 122, and the third winding 123 can be installed on the stator 11 according to a preset arrangement, thereby realizing the improvement of the working performance of the stator assembly 1 by optimizing the windings 12.

[0061] According to one embodiment of the present invention, the number of slot layers in each stator slot 111 is M, and M≥8. Since, for the same motor power, the more slot layers in each stator slot 111, the lower the rotational speed and the smaller the torque fluctuation, by setting the number of slot layers in each stator slot 111 within the above range, i.e., the minimum number of slot layers in each stator slot 111 is 8, the rotation of the winding 12 during operation is more stable, thereby improving the motor's performance and extending its service life.

[0062] Furthermore, in some specific embodiments of the present invention, the M structure is 8, the X structure is 5, and the K structure is 4. That is, in this embodiment, each stator slot 111 has 8 slot layers arranged radially along the stator 11. In the same winding, two adjacent winding segments are spaced by 4, 5, or 6 stator slots 111. The first winding 121, the second winding 122, and the third winding 123 all include 4 windings connected in parallel with each other. The number of stator slots 111 is 48, so as to achieve better working performance of the stator assembly 1.

[0063] Figures 9-16This illustrates the corresponding positional relationship between each winding in the first winding 121 and the number of stator slots 111 in this embodiment. In the figure, U1, U2, U3, and U4 respectively represent the first winding 1211, the first winding segment 12111, the second winding 1212, the third winding 1213, and the fourth winding 1214. In the figure, U+ and U-, U1+ and U1-, U2+ and U2-, U3+ and U3-, and U4+ and U4- are used to indicate that the currents in some corresponding windings are opposite. In the figure, W+ and W- are used to indicate that the currents in some corresponding windings in the second winding 122 are opposite, and V+ and V- are used to indicate that the currents in some corresponding windings in the third winding 123 are opposite. The first winding 121, the second winding 122, and the third winding 123 are arranged parallel to each other in the circumferential direction. The positions of the first winding 1211 and the second winding 1212 in the first winding 121, which are shifted two stator slots 111 in the circumferential direction, are the positions of the first winding 1211 and the second winding 1212 in the second winding 122. The positions of the first winding 1211 and the second winding 1212 in the first winding 121, which are shifted four stator slots 111 in the circumferential direction, are the positions of the first winding 1211 and the second winding 1212 in the third winding 123. In other words, the first winding 121, the second winding 122, and the third winding 123 are arranged alternately and sequentially in the stator slots 111 in the circumferential direction.

[0064] According to one embodiment of the present invention, the output terminals of the first winding 121, the second winding 122, and the third winding 123 are connected by a star-point connection. Specifically, the input terminals of the first winding 121, the second winding 122, and the third winding 123 are power supply terminals, which can be supplied with three-phase AC power. The output terminals of the first winding 121, the second winding 122, and the third winding 123 are connected by a star-point connection. Since the star-point connection helps to reduce the voltage across the winding 12 and lower the insulation level, by setting the output terminals of the first winding 121, the second winding 122, and the third winding 123 to be connected by a star-point connection, it is beneficial to simplify the insulation settings of the winding 12, reduce production difficulty, and help to reduce the operating starting current of the winding 12, thereby enabling the motor to operate more quickly and stably.

[0065] According to one embodiment of the present invention, multiple star points are constructed. At least two windings in the first winding 121, at least two windings in the second winding 122, and at least two windings in the third winding 123 are connected to the same star point; at least two other windings in the first winding 121, at least two other windings in the second winding 122, and at least two other windings in the third winding 123 are connected to another star point. That is, each star point in the winding 12 is connected to at least two windings of equal number in the first winding 121, the second winding 122, and the third winding 123. By setting multiple star points, there are more connection points at the output ends of the first winding 121, the second winding 122, and the third winding 123, thereby further reducing the voltage withstand and insulation level of the winding 12, further reducing the manufacturing difficulty of the winding 12, and improving the safety of the stator assembly 1.

[0066] According to one embodiment of the present invention, the winding 12 includes a plurality of U-shaped conductors 124, which are used to carry current in the winding 12. Each U-shaped conductor 124 includes two slot portions 1241, which can be respectively embedded in two different stator slots 111 to realize the installation of the U-shaped conductor 124 on the stator 11; each U-shaped conductor 124 also includes a bent portion 1242 connecting one end of the two slot portions 1241, the bent portion 1242 makes the overall end structure of the winding 12 more compact, thereby making it easier to optimize the size of the motor and increase the power of the motor; each U-shaped conductor 124 also includes a connecting portion 1243 respectively provided at the other end of the two slot portions 1241, wherein the connecting portion 1243 is bent relative to the slot portion 1241 in which it is located. It is understood that the connecting portion 1243 on each U-shaped conductor 124 can be used to connect with the connecting portion 1243 on another U-shaped conductor 124 to realize the current conduction in the winding 12 and ensure the normal operation of the motor. In this invention, by setting the U-shaped conductor 124 to include the slot portion 1241, the bending portion 1242, and the connecting portion 1243, multiple U-shaped conductors 124 can be easily and quickly installed on the stator 11, improving the assembly efficiency of the winding 12. At the same time, it also makes the structure of the winding 12 more compact, optimizes the size of the motor, and helps to improve the motor power and working efficiency.

[0067] Furthermore, in a specific embodiment of the present invention, the winding 12 further includes a plurality of I-type conductors 125. Each I-type conductor 125 includes an I-type conductor slot portion 1251 and I-type conductor connecting portions 1252 located at both ends of the I-type conductor slot portion 1251. The I-type conductor connecting portions 1252 on each I-type conductor 125 can be used to connect with the connecting portions 1243 on the U-type conductor 124 or to connect with the incoming current, so as to realize the current conduction in the winding 12 and ensure the normal operation of the motor.

[0068] In this invention, the arrangement of U-shaped conductors 124 and I-shaped conductors 125 on the stator 11 is regular and simple, which can reduce the complexity of the winding 12 manufacturing process, save production costs, and improve processing efficiency.

[0069] The motor according to the present invention is briefly described below.

[0070] The motor according to the present invention includes the stator assembly 1 as described in any one of the above embodiments. Since the motor according to the present invention includes the stator assembly 1 as described in any one of the above embodiments, each winding in the stator assembly 1 of the motor includes multiple winding segments spaced sequentially at intervals of X stator slots 111, X-1 or X+1 stator slots 111, X stator slots 111, X+1 or X-1 stator slots 111, X stator slots 111, X-1 or X+1 stator slots 111, and X stator slots 111. The arrangement of the windings 12 in the stator assembly 1 is more symmetrical, and the current distribution during operation of the windings 12 is more balanced, thereby effectively improving motor efficiency and motor safety. Furthermore, the simple arrangement of the windings 12 on the stator 11 in the stator assembly 1 is beneficial for the mass production of the stator assembly 1, improving the economic efficiency of the motor.

[0071] The vehicle according to the present invention is briefly described below.

[0072] The vehicle according to the present invention includes the motor described in any one of the above embodiments. Since the vehicle according to the present invention includes the motor described in any one of the above embodiments, the motor in the vehicle has higher working efficiency, better working performance, higher safety, and better economic benefits, thereby improving the working performance and safety of the vehicle, saving economic costs, and providing a better user experience.

[0073] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0074] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0075] In the description of this invention, "a plurality of" means two or more.

[0076] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0077] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., 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 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.

[0079] Although embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly for an electric motor, characterized in that, include: A stator having a plurality of stator slots arranged circumferentially, each stator slot having M slot layers arranged radially along the stator; The winding includes a first winding, a second winding, and a third winding, wherein the first winding, the second winding, and the third winding are arranged parallel to each other in the circumferential direction; The first winding, the second winding, and the third winding each include at least two windings connected in parallel with each other; wherein The multi-path winding includes a first path winding having multiple winding segments connected sequentially to each other, and the windings located in two adjacent slot layers include: The first winding segment and the second winding segment are connected sequentially and located in the Lth layer and the L+1th layer, and the first winding segment and the second winding segment are spaced apart by X stator slots; The second winding segment and the third winding segment are connected in sequence and located in the Lth layer and the L+1th layer, and the second winding segment and the third winding segment are spaced apart by X-1 or X+1 stator slots; The third winding segment and the fourth winding segment are connected in sequence and located in the Lth layer and the L+1th layer, and the third winding segment and the fourth winding segment are spaced apart by X stator slots. The fourth winding segment and the fifth winding segment are connected in sequence and located in the Lth layer and the L+1th layer, and the fourth winding segment and the fifth winding segment are spaced apart by X+1 or X-1 stator slots. The fifth winding segment and the sixth winding segment are connected in sequence and located in the Lth layer and the L+1th layer, and the fifth winding segment and the sixth winding segment are spaced apart by X stator slots; The sixth winding segment and the seventh winding segment are connected in sequence and located in the Lth layer and the L+1th layer, and the sixth winding segment and the seventh winding segment are spaced apart by X-1 or X+1 stator slots; The seventh winding segment and the eighth winding segment are connected in sequence and located in the Lth layer and the L+1th layer, and the seventh winding segment and the eighth winding segment are spaced apart by X stator slots. The multi-path winding further includes a second path winding, a third path winding, and a fourth path winding; the second path winding has the same direction as the first path winding and is located in an adjacent stator slot; the third path winding has the opposite winding direction to the first path winding and is located in an adjacent stator slot; the fourth path winding has the opposite winding direction to the first path winding and is located in a stator slot adjacent to the stator slot where the third path winding is located; the multiple winding segments of each of the first, second, third, and fourth path windings are arranged in parallel; the output end of the first path winding is connected to the input end of the fourth path winding, and the output end of the second path winding is connected to the input end of the third path winding to form a two-path connection; The winding includes a plurality of U-shaped conductors, each U-shaped conductor including two slot portions, a bent portion connecting one end of the two slot portions, and a connecting portion respectively disposed at the other end of the two slot portions, the connecting portion being bent relative to the slot portion in which it is located; The winding also includes a plurality of I-type conductors, each of which includes an I-type conductor slot portion and I-type conductor connecting portions located at both ends of the I-type conductor slot portion. The I-type conductor connecting portions on each I-type conductor are used to connect with the connecting portions on the U-type conductor or to receive current.

2. The stator assembly according to claim 1, characterized in that, The second winding has multiple winding segments connected sequentially to each other, and the winding located in two adjacent slot layers includes: The first winding segment and the second winding segment are connected sequentially and located in the Lth layer and the L+1th layer, with a spacing of X stator slots between the first winding segment and the second winding segment; The second winding segment is connected to the third winding segment in sequence and is located in the Lth layer and the L+1th layer, and the second winding segment and the third winding segment are spaced apart by X+1 or X-1 stator slots. The third winding segment is connected to the fourth winding segment in sequence and is located in the Lth layer and the L+1th layer, with a stator slot spacing of X between the third winding segment and the fourth winding segment; The fourth winding segment is connected to the fifth winding segment in sequence and is located in the Lth layer and the L+1th layer, and the fourth winding segment and the fifth winding segment are spaced apart by X-1 or X+1 stator slots; The fifth winding segment is connected to the sixth winding segment in sequence and is located in the Lth layer and the L+1th layer, and the fifth winding segment and the sixth winding segment are spaced apart by X stator slots; The sixth winding segment is connected to the seventh winding segment in sequence and is located in the Lth layer and the L+1th layer, and the sixth winding segment and the seventh winding segment are spaced apart by X+1 or X-1 stator slots; The seventh winding segment is connected to the eighth winding segment in sequence and is located in the Lth and L+1th layers, with a stator slot spacing of X between the seventh winding segment and the eighth winding segment.

3. The stator assembly according to claim 2, characterized in that, The third winding has multiple winding segments connected sequentially to each other, and the winding located in two adjacent slot layers includes: The first winding segment and the second winding segment are connected sequentially and located in adjacent layers M and M-1, with a spacing of X stator slots between the first winding segment and the second winding segment; The second winding segment is connected to the third winding segment in sequence and is located in the adjacent Mth and M-1th layers, and the second winding segment and the third winding segment are spaced apart by X+1 or X-1 stator slots. The third winding segment is connected to the fourth winding segment in sequence and is located in the adjacent Mth layer and M-1th layer, with a stator slot spacing of X between the third winding segment and the fourth winding segment; The fourth winding segment is connected to the fifth winding segment in sequence and is located in the adjacent Mth and M-1th layers, and the fourth winding segment and the fifth winding segment are spaced apart by X-1 or X+1 stator slots; The fifth winding segment is connected to the sixth winding segment in sequence and is located in the adjacent Mth layer and M-1th layer, and the fifth winding segment and the sixth winding segment are spaced apart by X stator slots; The sixth winding segment is connected to the seventh winding segment in sequence and is located in the adjacent Mth and M-1th layers, and the sixth winding segment and the seventh winding segment are spaced apart by X+1 or X-1 stator slots; The seventh winding segment is connected to the eighth winding segment in sequence and is located in the adjacent Mth and M-1th layers, with a stator slot spacing of X between the seventh winding segment and the eighth winding segment.

4. The stator assembly according to claim 3, characterized in that, The fourth winding has multiple winding segments connected sequentially to each other, and the winding located in two adjacent slot layers includes: The first winding segment and the second winding segment are connected sequentially and located in adjacent layers M and M-1, with a spacing of X stator slots between the first winding segment and the second winding segment; The second winding segment is connected to the third winding segment in sequence and is located in the adjacent Mth and M-1th layers, and the second winding segment and the third winding segment are spaced apart by X-1 or X+1 stator slots. The third winding segment is connected to the fourth winding segment in sequence and is located in the adjacent Mth layer and M-1th layer, with a stator slot spacing of X between the third winding segment and the fourth winding segment; The fourth winding segment is connected to the fifth winding segment in sequence and is located in the adjacent Mth and M-1th layers, and the fourth winding segment and the fifth winding segment are spaced apart by X+1 or X-1 stator slots; The fifth winding segment is connected to the sixth winding segment in sequence and is located in the adjacent Mth layer and M-1th layer, and the fifth winding segment and the sixth winding segment are spaced apart by X stator slots; The sixth winding segment is connected to the seventh winding segment in sequence and is located in the adjacent Mth and M-1th layers, and the sixth winding segment and the seventh winding segment are spaced apart by X-1 or X+1 stator slots; The seventh winding segment is connected to the eighth winding segment in sequence and is located in the adjacent Mth and M-1th layers, with a stator slot spacing of X between the seventh winding segment and the eighth winding segment.

5. The stator assembly according to any one of claims 1-4, characterized in that, The winding segment located at the end of the Lth layer and / or the L+1th layer is spaced X stator slots apart from the adjacent winding segment located in the L+2th layer.

6. The stator assembly according to claim 1, characterized in that, The first winding, the second winding, and the third winding all include K windings connected in parallel with each other, and the number of stator slots is N, satisfying: N=3 K M / 2.

7. The stator assembly according to claim 6, characterized in that, The number of slot layers in each stator slot is M, and M≥8.

8. The stator assembly according to claim 1, characterized in that, The lead-out terminals of the first winding, the second winding, and the third winding are connected by a star point.

9. The stator assembly according to claim 8, characterized in that, There are multiple star points, and at least two windings in the first winding, at least two windings in the second winding, and at least two windings in the third winding are connected to the same star point. At least two additional windings in the first winding, at least two additional windings in the second winding, and at least two additional windings in the third winding are connected to another star point.

10. An electric motor, characterized in that, Includes the stator assembly according to any one of claims 1-9.

11. A vehicle, characterized in that, Includes the motor according to claim 10.

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