Stator, electric machine and vehicle

Abstract

The application discloses a kind of stator, motor and vehicle, stator includes: stator core;Stator winding, including first coil group and second coil group, first coil group includes concentric and pitch increasing first coil, second coil and third coil, second coil group includes concentric and pitch increasing fourth coil, fifth coil and sixth coil, multiple first coil group is distributed along stator core circumferentially, the adjacent slot conductor in the adjacent two third coils is located in the same stator tooth slot, the slot conductor of second coil is arranged in the stator tooth slot between first coil and third coil, multiple second coil group is distributed along stator core circumferentially, the adjacent slot conductor in the adjacent two sixth coils is located in the same stator tooth slot, the slot conductor of fifth coil is arranged in the stator tooth slot between fourth coil and sixth coil, and each slot conductor of fourth coil is located in the same stator tooth slot with the slot conductor of one first coil.The stator according to the embodiment of the application reduces the difficulty of assembly process.

Description

Technical Field

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

[0002] In some related technologies, flat wire winding motors mostly use hairpin windings, the process of which includes hairpin winding forming, twisting and flaring, welding, etc. Each process has very complex requirements, and this structure limits the winding method of flat wires and makes it difficult to change the number of flat wire layers. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a stator that reduces the difficulty of process manufacturing.

[0004] The present invention also proposes an electric motor having the above-described stator.

[0005] The present invention also proposes a vehicle having the above-mentioned motor.

[0006] According to an embodiment of the present invention, a stator includes: a stator core having a plurality of stator slots; and a stator winding comprising a plurality of first coil groups and a plurality of second coil groups mounted on the stator core. Each first coil group includes a first coil, at least one second coil, and a third coil arranged concentrically with increasing pitch. Each second coil group includes a fourth coil, at least one fifth coil, and a sixth coil arranged concentrically with increasing pitch. Each of the first, second, third, fourth, fifth, and sixth coils includes two in-slot conductors. The pitch of each of the first and fourth coils is greater than or equal to 4. Each of the first, second, third, fourth, fifth, and sixth coils is prefabricated. A coil, wherein a plurality of first coil groups are distributed circumferentially along the stator core, and adjacent slot conductors of two adjacent third coils are located in the same stator slot; a slot conductor of a second coil is provided in a stator slot located between the slot conductors of the first coils and the slot conductors of the third coils; a plurality of second coil groups are distributed circumferentially along the stator core, and adjacent slot conductors of two adjacent sixth coils are located in the same stator slot; a slot conductor of a fifth coil is provided in a stator slot located between the slot conductors of the fourth coil and the slot conductors of the sixth coils; each slot conductor of the fourth coil is located in the same stator slot as one slot conductor of the first coil.

[0007] According to embodiments of the present invention, the stator comprises a first coil group and a second coil group, consisting of prefabricated first, second, third, fourth, fifth, and sixth coils, which are orderly installed within the stator slots of the stator core. This avoids interference between the coils, reduces assembly process difficulty, and improves production efficiency and yield. Furthermore, the number of coils and the number of conductors in each coil are easily adjustable to meet the application requirements of different motors.

[0008] In addition, the stator according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the number of conductors included in the slot conductors of the first coil, the slot conductors of the third coil, the slot conductors of the fourth coil, and the slot conductors of the sixth coil are equal and are all n, and the number of conductors included in the slot conductors of the second coil and the slot conductors of the fifth coil are equal and are all N, where N / n = 2.

[0010] According to some embodiments of the present invention, the slot conductor comprises a single conductor group or multiple conductor groups arranged circumferentially along the stator core, each conductor group comprising a plurality of conductors arranged radially along the stator core.

[0011] According to some embodiments of the present invention, two in-slot conductors located in the same stator slot are arranged radially along the stator core.

[0012] According to some embodiments of the present invention, in the circumferential direction of the stator core, the slot width of the stator tooth is W, and the slot opening width of the stator tooth is L, where 0.5W≤L≤0.9W.

[0013] According to some embodiments of the present invention, the first coil, the second coil, and the third coil each include two slot conductors, two first circumferential conductors, and four first connecting conductors connecting the slot conductors and the first circumferential conductors, wherein the first circumferential conductors extend circumferentially along the stator core, and the first connecting conductors extend radially along the stator core; the fourth coil, the fifth coil, and the sixth coil each include two slot conductors, two second circumferential conductors, and four second connecting conductors connecting the slot conductors and the second circumferential conductors, wherein the second circumferential conductors extend circumferentially along the stator core, and the second connecting conductors extend axially along the stator core.

[0014] According to some embodiments of the present invention, the stator core includes an annular stator yoke and a plurality of stator teeth arranged circumferentially along the stator yoke, wherein the first circumferential conductor is located axially outside the stator yoke, and the second circumferential conductor is located axially outside the stator teeth.

[0015] According to some embodiments of the present invention, in the axial direction of the stator core, the second circumferential conductor is located on the side of the first circumferential conductor away from the stator core.

[0016] According to some embodiments of the present invention, within the same stator slot, the slot conductor of the fourth coil is located on the side of the slot conductor of the first coil away from the stator yoke.

[0017] According to some embodiments of the present invention, in the same first coil group, the first circumferential conductors of the first coil, the second coil and the third coil are arranged sequentially along the radial direction of the stator core; in the same second coil group, the second circumferential conductors of the fourth coil, the fifth coil and the sixth coil are arranged sequentially along the axial direction of the stator core.

[0018] According to some embodiments of the present invention, the stator winding includes a multi-phase winding, wherein the first coil group and the second coil group corresponding to the same phase are alternately arranged along the circumference of the stator core, each phase winding includes multiple branches connected in parallel, and each branch is connected in series with the first coil, the second coil and the third coil of the first coil group, and / or the fourth coil, the fifth coil and the sixth coil of the second coil group.

[0019] According to some embodiments of the present invention, the number of stator slots is 48, and the number of stator pole pairs is 6.

[0020] The motor according to an embodiment of the present invention includes a stator according to an embodiment of the present invention.

[0021] The vehicle according to an embodiment of the present invention includes a motor according to an embodiment of the present invention.

[0022] 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

[0023] 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:

[0024] Figure 1 This is an axial view of the stator core according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the stator winding structure according to an embodiment of the present invention;

[0026] Figure 3 This is an axial perspective view of the stator winding according to an embodiment of the present invention;

[0027] Figure 4 yes Figure 3 The center circle shows an enlarged structural diagram at point A.

[0028] Figure 5 This is a schematic diagram of the stator core and the first coil group according to an embodiment of the present invention;

[0029] Figure 6 This is an axial perspective view of the stator core and the first coil group according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of one phase winding according to an embodiment of the present invention;

[0031] Figure 8 This is an axial perspective view of one phase winding according to an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the structure of the first coil group according to an embodiment of the present invention;

[0033] Figure 10 This is an axial perspective view of the first coil group according to an embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the structure of the first coil according to an embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the structure of the second coil according to an embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the structure of the third coil according to an embodiment of the present invention;

[0037] Figure 14 This is a schematic diagram of the structure of the second coil group according to an embodiment of the present invention;

[0038] Figure 15 This is an axial perspective view of the second coil group according to an embodiment of the present invention;

[0039] Figure 16 This is a schematic diagram of the structure of the fourth coil according to an embodiment of the present invention;

[0040] Figure 17 This is a schematic diagram of the structure of the fifth coil according to an embodiment of the present invention;

[0041] Figure 18 This is a schematic diagram of the structure of the sixth coil according to an embodiment of the present invention;

[0042] Figure 19 This is a schematic diagram of the circuit of the same phase winding according to some embodiments of the present invention;

[0043] Figure 20 This is a schematic diagram of the circuit of the same phase winding according to other embodiments of the present invention;

[0044] Figure 21 This is a schematic diagram of a vehicle according to an embodiment of the present invention.

[0045] Figure label:

[0046] Stator 100; Motor 200; Vehicle 300;

[0047] Stator core 10; stator tooth slot 101; stator tooth 11; stator yoke 12; tooth shoe 13;

[0048] Stator winding 20; slot conductor 21; conductor group 211; conductor 212;

[0049] First coil group 30; First coil 31; Second coil 32; Third coil 33; First circumferential conductor 34; First connecting conductor 35;

[0050] Second coil group 40; fourth coil 41; fifth coil 42; sixth coil 43; second circumferential conductor 44; second connecting conductor 45. Detailed Implementation

[0051] 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.

[0052] 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.

[0053] In the description of this invention, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "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 "above," "over," and "on top" 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.

[0054] The stator 100 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0055] Reference Figures 1-6 As shown, the stator 100 according to an embodiment of the present invention may include: a stator core 10 and a stator winding 20.

[0056] Specifically, the stator core 10 has a plurality of stator slots 101. For example, the stator core 10 may include a stator yoke 12 and stator teeth 11, wherein the stator yoke 12 is annular, and there are multiple stator teeth 11 distributed circumferentially along the stator yoke 12 and disposed on the inner circumferential surface of the stator yoke 12 for use with an inner rotor motor 200. In other words, the outer end of each stator tooth 11 along the radial direction of the stator core 10 is connected to the inner circumferential surface of the stator yoke 12, and the inner ends of the multiple stator teeth 11 may define a stator hole coaxial with the stator yoke 12. Alternatively, the multiple stator teeth 11 are disposed on the outer circumferential surface of the stator yoke 12 for use with an outer rotor motor 200. In other words, the inner end of each stator tooth 11 along the radial direction of the stator core 10 is connected to the outer circumferential surface of the stator yoke 12. Figures 1-6 As shown, a stator tooth groove 101 is formed between two adjacent stator tooth portions 11.

[0057] The stator yoke 12 provides mechanical support for a plurality of stator teeth 11, thereby fixing the position of the stator teeth 11. In some embodiments, the stator teeth 11 may be integrally formed on the stator yoke 12.

[0058] The specific structure of the stator 100 is described below with the stator tooth portion 11 located on the inner peripheral surface of the stator yoke portion 12 as an example. Based on the following description, the embodiment in which the stator tooth portion 11 is located on the outer peripheral surface of the stator yoke portion 12 will be understood by those skilled in the art.

[0059] Reference Figures 1-8 As shown, the stator winding 20 includes a plurality of first coil groups 30 and a plurality of second coil groups 40 mounted on the stator core 10.

[0060] The first coil group 30 includes a first coil 31, at least one second coil 32, and a third coil 33 arranged concentrically, with the pitch of the first coil 31, at least one second coil 32, and the third coil 33 increasing progressively, and the pitch of the first coil 31 being greater than or equal to 4. The second coil group 40 includes a fourth coil 41, at least one fifth coil 42, and a sixth coil 43 arranged concentrically, with the pitch of the fourth coil 41, at least one fifth coil 42, and the sixth coil 43 increasing progressively, and the pitch of the fourth coil 41 being greater than or equal to 4.

[0061] Each coil (first coil 31, second coil 32, third coil 33, fourth coil 41, fifth coil 42, and sixth coil 43) includes two slot conductors 21. The two slot conductors 21 are located in different stator slots 101. The difference in the numbering of the stator slots 101 where the two slot conductors 21 are located is the pitch (or slot span) of the coil. For example, the stator core 10 has a total of S stator slots 101, numbered sequentially along the circumference of the stator core 10 in the order of No. 1, No. 2, No. 3, ..., No. S-1, No. S. If one slot conductor 21 of a coil is located in stator slot 101 No. 1 and the other slot conductor 21 is located in stator slot 6, then the slot span of the coil is 5. If one slot conductor 21 of a coil is located in stator slot 101 No. S and the other slot conductor 21 is located in stator slot 7, then the slot span of the coil is 7.

[0062] by Figures 1-8 Taking the illustrated embodiment as an example, the pitch of the first coil 31 is 4 (short pitch), the second coil 32 is one with a pitch of 6 (full pitch), and the pitch of the third coil 33 is 8 (long pitch); the pitch of the fourth coil 41 is 4 (short pitch), the fifth coil 42 is one with a pitch of 6 (full pitch), and the pitch of the third coil 33 is 8 (long pitch).

[0063] In an embodiment where the first coil group 30 includes a plurality of second coils 32, the pitch of the plurality of second coils 32 increases and the pitch difference between two adjacent second coils 32 is 2. Similarly, in an embodiment where the second coil group 40 includes a plurality of fifth coils 42, the pitch of the plurality of fifth coils 42 increases and the pitch difference between two adjacent fifth coils 42 is 2.

[0064] Among them, continue to refer to Figures 1-8As shown, multiple first coil groups 30 are distributed circumferentially along the stator core 10. Furthermore, adjacent slot conductors 21 of two adjacent third coils 33 are located in the same stator slot 101; that is, one slot conductor 21 of any third coil 33 shares a slot with one slot conductor 21 of an adjacent third coil 33, and the other slot conductor 21 of that third coil 33 shares a slot with one slot conductor 21 of another adjacent third coil 33. A slot conductor 21 of a second coil 32 is located in the stator slot 101 between the slot conductors 21 of the first coils 31 and the slot conductors 21 of the third coils 33; that is, each slot conductor 21 of the second coil 32 occupies a separate stator slot 101.

[0065] Multiple second coil groups 40 are distributed circumferentially along the stator core 10. Adjacent slot conductors 21 of two adjacent sixth coils 43 are located in the same stator slot 101; that is, one slot conductor 21 of any sixth coil 43 shares a slot with one slot conductor 21 of an adjacent sixth coil 43, and the other slot conductor 21 of that sixth coil 43 shares a slot with one slot conductor 21 of another adjacent sixth coil 43. A slot conductor 21 of the fifth coil 42 is located in the stator slot 101 between the slot conductors 21 of the fourth coil 41 and the slot conductors 21 of the sixth coil 43; that is, each slot conductor 21 of the fifth coil 42 occupies a separate stator slot 101.

[0066] Furthermore, each slot conductor 21 of the fourth coil 41 is located in the same stator slot 101 as one slot conductor 21 of the first coil 31. Thus, the multiple first coil groups 30 and multiple second coil groups 40 can be staggered circumferentially by a predetermined angle in the stator core 10. This predetermined angle is half the central angle corresponding to the first coil group 30, such that between two slot conductors 21 of each fourth coil 41, there is one half slot conductor 21 of the second coil 32 and third coil 33 of the first coil group 30, and another half slot conductor 21 of the second coil 32 and third coil 33 of the other first coil group 30; between two slot conductors 21 of each first coil 31, there is one half slot conductor 21 of the fifth coil 42 and sixth coil 43 of the second coil group 40, and another half slot conductor 21 of the fifth coil 42 and sixth coil 43 of the other second coil group 40.

[0067] In one specific embodiment, such as Figures 1-8 As shown, the stator core 10 has 48 stator slots 101, numbered sequentially as No. 1, No. 2, No. 3... No. 47, No. 48. Each first coil group 30 includes three coils arranged concentrically, namely the first coil 31, the second coil 32 and the third coil 33, and each second coil group 40 also includes three coils arranged concentrically, namely the fourth coil 41, the fifth coil 42 and the sixth coil 43.

[0068] In one of the first coil groups 30, the slot numbers corresponding to the two slot conductors 21 of the first coil 31 are 3 and 7; the slot numbers corresponding to the two slot conductors 21 of the second coil 32 are 2 and 8; and the slot numbers corresponding to the two slot conductors 21 of the third coil 33 are 1 and 9. In the adjacent first coil group 30, the slot numbers corresponding to the two slot conductors 21 of the first coil 31 are 11 and 15; the slot numbers corresponding to the two slot conductors 21 of the second coil 32 are 10 and 16; and the slot numbers corresponding to the two slot conductors 21 of the third coil 33 are 9 and 17. In one second coil group 40, the slot numbers corresponding to the two slot conductors 21 of the fourth coil 41 are 7 and 11, the slot numbers corresponding to the two slot conductors 21 of the fifth coil 42 are 6 and 12, and the slot numbers corresponding to the two slot conductors 21 of the sixth coil 43 are 5 and 13; in the adjacent second coil group 40, the slot numbers corresponding to the two slot conductors 21 of the fourth coil 41 are 15 and 19, the slot numbers corresponding to the two slot conductors 21 of the fifth coil 42 are 14 and 20, and the slot numbers corresponding to the two slot conductors 21 of the sixth coil 43 are 13 and 21.

[0069] The stator winding 20 is composed of six coils: a first coil 31, a second coil 32, a third coil 33, a fourth coil 41, a fifth coil 42, and a sixth coil 43. All six coils are prefabricated coils.

[0070] After prefabrication, multiple first coil groups 30 can be sequentially installed into the corresponding stator slots 101 of the stator core 10. Within each first coil group 30, the third coil 33, second coil 32, and first coil 31 are sequentially installed into the corresponding stator slots 101. Then, multiple second coil groups 40 are sequentially installed into the corresponding stator slots 101 of the stator core 10. Within each second coil group 40, the fourth coil 41, fifth coil 42, and sixth coil 43 are sequentially installed into the corresponding stator slots 101. Alternatively, multiple third coils 33 can be sequentially installed into the stator core 10, followed by multiple second coils 32, then multiple first coils 31, then multiple fourth coils 41, then multiple fifth coils 42, and finally multiple sixth coils 43. Of course, the installation sequence of each coil is not limited to this, as long as it meets the requirement that each coil can be installed in an orderly manner into the stator core 10.

[0071] During coil installation, there is no positional interference between the coils; for example, there is no interference between two conductors 21 located in the same stator slot 101. Furthermore, the coil winding process is not limited by the small space of the stator core 10, and the positional arrangement and bending direction of the conductors 212 included in the coil are easily controlled during winding. This is beneficial for improving winding efficiency and yield, and for meeting the needs of different stators 100 to change the number of coils and the number of conductors included in the coil. Moreover, the relatively small number of conductors included in the slot conductors 21 located in the same stator slot 101 facilitates the orderliness of the winding and installation process of the slot conductors 21, and allows for more flexible adjustment of the number of conductors included.

[0072] According to an embodiment of the present invention, the stator 100 comprises a first coil group 30 and a second coil group 40, which are prefabricated first coil 31, second coil 32, third coil 33, fourth coil 41, fifth coil 42 and sixth coil 43. These coils are then orderly installed within the stator slots 101 of the stator core 10. This arrangement avoids interference between the coils, reduces assembly process difficulty, and improves production efficiency and yield. Furthermore, the number of coils and the number of conductors in each coil are easily adjustable to meet the application requirements of different motors 200.

[0073] In embodiments of the present invention, the arrangement of the two slot conductors 21 located in the same stator slot 101 can be flexibly set according to actual conditions.

[0074] In some embodiments, such as Figures 2-6 As shown, two slot conductors 21 located in the same stator slot 101 are arranged radially along the stator core 10. For example, the slot conductors 21 of the two third coils 33 are both located in stator slot 9 101, with one third coil 33's slot conductor 21 located in the radial outer ring of stator slot 9 101 and the other third coil 33's slot conductor 21 located in the radial inner ring of stator slot 9 101; as another example, one slot conductor 21 of the first coil 31 and one slot conductor 21 of the fourth coil 41 are both located in stator slot 7 101, with the first coil 31's slot conductor 21 located in the radial outer ring of stator slot 7 101 and the fourth coil 41's slot conductor 21 located in the radial inner ring of stator slot 7 101. Therefore, when installing the stator winding 20, the slot conductor 21 located on the radial outer ring can be installed into the stator slot 101 first, so that the slot conductor 21 is limited by the bottom wall and two side walls of the stator slot 101. Then, the slot conductor 21 located on the radial inner ring can be installed into the stator slot 101. This makes it easier to achieve the orderly installation of the two slot conductors 21 and avoids mutual interference.

[0075] In other embodiments, two in-slot conductors 21 located in the same stator slot 101 can be arranged circumferentially along the stator core 10. For example, the in-slot conductors 21 of both third coils 33 are located in stator slot 9 101, and the two third coils 33 are arranged left and right circumferentially along the stator core 10, with the in-slot conductor 21 of the left third coil 33 located to the left of the in-slot conductor 21 of the right third coil 33; as another example, one in-slot conductor 21 of the first coil 31 and one in-slot conductor 21 of the fourth coil 41 are both located in stator slot 7 101, and the in-slot conductor 21 of the first coil 31 is located to the right of the in-slot conductor 21 of the fourth coil 41 (i.e., close to the side of the adjacent in-slot conductor 21 belonging to the same first coil group 30). This forms multiple layers of conductors 212 arranged circumferentially along the stator core 101 within the same stator slot 101, increasing the versatility of the motor 200.

[0076] According to some embodiments of the present invention, such as Figures 2-18 As shown, the slot conductor 21 may include a conductor group 211, which includes a plurality of conductors 212 arranged radially along the stator core 10. In some embodiments, the conductors 212 may be flat wires. For example, in some specific embodiments, such as Figures 9-18 As shown, the slot conductor 21 of the first coil 31 is a single-layer conductor group 211 and includes four conductors 212; the slot conductor 21 of the second coil 32 is a single-layer conductor group 211 and includes eight conductors 212; the slot conductor 21 of the third coil 33 is a single-layer conductor group 211 and includes four conductors 212; the slot conductor 21 of the fourth coil 41 is a single-layer conductor group 211 and includes four conductors 212; the slot conductor 21 of the fifth coil 42 is a single-layer conductor group 211 and includes eight conductors 212; and the slot conductor 21 of the sixth coil 43 is a single-layer conductor group 211 and includes four conductors 212. The single-layer conductor 212 is easier to install, and the smaller number of conductors in some slot conductors 21 further reduces the installation difficulty and facilitates the orderly installation of multiple conductors 212. Two slot conductors 21 located in the same stator slot 101 can be arranged radially along the stator core 10. For example, the four conductors 212 of the fourth coil 41 and the four conductors 212 of the first coil 31 are stacked radially along the stator core 10 to form a single-layer conductor group 211 including eight conductors 212.

[0077] According to other embodiments of the present invention, the slot conductor 21 may include a multilayer conductor group 211 arranged circumferentially along the stator core 10, each conductor group 211 including a plurality of conductors 212 arranged radially along the stator core 10. For example, in some specific embodiments, the slot conductors 21 of the first coil 31, the third coil 33, the fourth coil 41 and the sixth coil 43 are all double-layer conductor groups 211, and each conductor group 211 includes four conductors 212 arranged radially. The slot conductors 21 of the second coil 32 and the fifth coil 42 are also double-layer conductor groups 211, and each conductor group 211 includes eight conductors 212 arranged radially. Two slot conductors 21 located in the same stator slot 101 may be arranged radially along the stator core 10. For example, the two conductor groups 211 of the fourth coil 41 and the two conductor groups 211 of the first coil 31 are stacked radially to form a double-layer conductor group 211, each layer including eight conductors 212.

[0078] In some embodiments of the present invention, such as Figures 2-8 As shown, the number of conductors included in the slot conductor 21 of the first coil 31, the slot conductor 21 of the third coil 33, the slot conductor 21 of the fourth coil 41, and the slot conductor 21 of the sixth coil 43 are equal and are all n. The number of conductors included in the slot conductor 21 of the second coil 32 and the slot conductor 21 of the fifth coil 42 are equal and are all N, N / n=2.

[0079] For example Figures 2-8 In the example shown, the slot conductors 21 of the first coil 31, the third coil 33, the fourth coil 41, and the sixth coil 43 each include four conductors 212, while the slot conductors 21 of the second coil 32 and the fifth coil 42 each include eight conductors 212. This arrangement ensures that the slot conductors 21 of the first coil 31 and the fourth coil 41 share a slot, the two third coils 33 share a slot, and the two sixth coils 43 share a slot. This results in eight conductors in each stator slot 101, ensuring a uniform distribution of conductors 212 across the multiple stator slots 101 of the stator core 10. This improves the performance of the motor 200. Furthermore, the simpler structure of the first coil 31, the third coil 33, the fourth coil 41, and the sixth coil 43 reduces the number of coil types and lowers winding and assembly difficulty.

[0080] Of course, depending on the actual needs, the number of conductors included in the slot conductor 21 of the first coil 31, the slot conductor 21 of the third coil 33, the slot conductor 21 of the fourth coil 41, and the slot conductor 21 of the sixth coil 43 can also be different. For example, the slot conductor 21 of the first coil 31 can include three conductors 212, and the slot conductor 21 of the fourth coil 41 can include five conductors 212, so that after the slot conductor 21 of the first coil 31 and the slot conductor 21 of the fourth coil 41 are arranged in the same slot, the number of conductors in the stator slot 101 is also eight, which can also make the conductors 212 in the multiple stator slots 101 evenly distributed.

[0081] It should be noted that multiple conductors 212 within the same slot conductor 21 can be wound using the same wire, which simplifies the production process and improves production efficiency. Alternatively, in some embodiments where the slot conductor 21 includes a multi-layer conductor group 211, multiple conductors 212 located within the same conductor group 211 can be wound using the same wire. After each layer of conductor group 211 is installed into the stator slot 101, the multi-layer conductor groups 211 are then welded together to form a series structure. This not only meets the performance requirements such as increased torque but also further reduces the installation difficulty of the stator winding 20 on the stator core 10, improving assembly efficiency.

[0082] In some embodiments of the present invention, the slot width of the stator slot 101 is smaller than the slot width of the stator slot 101, so as to reduce the slot size of the stator slot 101, which is beneficial to improve torque, reduce air gap, and reduce harmonics, thereby improving NVH performance, reducing noise, and reducing iron loss of stator core 10.

[0083] For example, in some embodiments, such as Figure 1 As shown, the stator tooth groove 101 has a first inner side and a second inner side facing each other, with a distance of W between the first inner side and the second inner side. At least one of the ends of the first inner side and the second inner side (such as the inner end corresponding to the inner rotor motor 200 or the outer end corresponding to the outer rotor motor 200) is provided with a tooth shoe, and the tooth shoe forms the slot of the stator tooth groove 101. In other words, at least one of the ends of the two opposing sides of the stator tooth portion 11 is provided with a tooth shoe, so that the stator tooth portion 11 is formed into an unequal width structure, and the slot width of the stator tooth groove 101 is smaller than the width of the stator tooth groove 101.

[0084] In some embodiments, such as Figure 1As shown, in the circumferential direction of the stator core 10, the slot width of the stator slot 101 is W, and the slot opening width of the stator slot 101 is L, and W and L satisfy: 0.5W≤L≤0.9W. If L / W is too small, it will be difficult to install the conductor 21 into the stator slot 101, resulting in high installation difficulty; if L / W is too large, the slot opening size will be too large, which is not conducive to improving torque and reducing noise and iron loss. Within the above ratio range, the requirements of low installation difficulty and improved torque performance are taken into account. For example, in some specific embodiments, L / W can be 0.5, 0.6, 0.7, 0.8, and 0.9, etc.

[0085] In some embodiments of the present invention, reference is made to... Figures 1-6 As shown, the slot width of the stator slot 101 is greater than the width of the conductor 212. Here, "slot width" refers to the circumferential dimension of the slot in the stator core 10; "width of conductor 212" refers to the radial dimension of conductor 212 perpendicular to the axis of the stator core 10, for example... Figure 4 As shown, the cross-section of conductor 212 perpendicular to the axis of stator core 10 is roughly rectangular, and the length of the rectangle is the width of conductor 212.

[0086] By making the slot width of the stator slot 101 greater than the width of the conductor 212, the slot size is reduced while allowing the conductor 212 to be smoothly installed into the stator slot 101.

[0087] In some embodiments of the present invention, such as Figures 2-13 As shown, the first coil 31, the second coil 32, and the third coil 33 each include two slot conductors 21, two first circumferential conductors 34, and four first connecting conductors 35. The two slot conductors 21 are located within the stator slots 101 and extend axially along the stator core 10. The two first circumferential conductors 34 are located on opposite sides of the stator core 10 and extend circumferentially along the stator core 10. The first connecting conductors 35 extend radially along the stator core 10 and are used to connect the corresponding slot conductors 21 and the first circumferential conductors 34 to form a ring structure.

[0088] like Figures 2-8 and Figures 14-18As shown, the fourth coil 41, the fifth coil 42, and the sixth coil 43 each include two slot conductors 21, two second circumferential conductors 44, and four second connecting conductors 45. The two slot conductors 21 are located within the stator slots 101 and extend axially along the stator core 10. The two second circumferential conductors 44 are located on opposite sides of the stator core 10 and extend circumferentially along the stator core 10. The second connecting conductors 45 extend axially along the stator core 10 and are used to connect the corresponding slot conductors 21 and second circumferential conductors 44 to form a ring structure.

[0089] Thus, the first coil group 30 and the second coil group 40 constitute different coil group structures, and through the first connecting conductor 35 extending radially and the second connecting conductor 45 extending axially, the first circumferential conductor 34 and the second circumferential conductor 44 can be staggered by a certain distance in both the axial and radial directions of the stator core 10, so that interference is not likely to occur between the coil groups in the radial and axial directions.

[0090] According to some embodiments of the present invention, such as Figures 1-8 As shown, the stator core 10 includes an annular stator yoke 12 and multiple stator teeth 11, which are arranged circumferentially around the stator yoke 12. A first circumferential conductor 34 is located axially outside the stator yoke 12, and a second circumferential conductor 44 is located axially outside the stator teeth 11. In other words, the projection of the first circumferential conductor 34 along the axial direction of the stator core 10 falls within the projection range of the stator yoke 12, and the projection of the second circumferential conductor 44 along the axial direction of the stator core 10 is located in the region between the stator yoke 12 and the stator hole. Thus, the first circumferential conductor 34 of the first coil group 30 and the second circumferential conductor 44 of the second coil group 40 are arranged radially offset from each other along the stator core 10, satisfying the arrangement requirements of the first coil group 30 and the second coil group 40 arranged circumferentially offset, avoiding interference, and facilitating installation.

[0091] In some embodiments, continue to refer to Figures 1-8 As shown, in the axial direction of the stator core 10, the second circumferential conductor 44 is located on the side of the first circumferential conductor 34 away from the stator core 10. This is to make the first circumferential conductor 34 and the second circumferential conductor 44 staggered in the axial direction of the stator core 10, satisfying the arrangement requirements of the first coil group 30 and the second coil group 40 arranged circumferentially staggered, and avoiding interference.

[0092] During the assembly process, multiple first coil groups 30 can be installed into the corresponding stator slots 101, so that the two first circumferential conductors 34 of each coil of the first coil group 30 are located on both sides of the axial direction of the stator yoke 12, and the first circumferential conductors 34 are in clearance fit with the stator yoke 12; then multiple second coil groups 40 can be installed into the corresponding stator slots 101, so that the two second circumferential conductors 44 of each coil of each second coil group 40 are located on both sides of the axial direction of the stator slot 11, and the second circumferential conductors 44 are located outside the first circumferential conductors 34 (i.e., on the side away from the stator core 10). The assembly of the first coil group 30 does not affect the assembly of the second coil group 40, and the structure and arrangement are reasonable and orderly.

[0093] In some embodiments, such as Figure 3 and Figure 4 As shown, within the same stator slot 101, the slot conductor 21 of the fourth coil 41 is located on the side of the slot conductor 21 of the first coil 31 away from the stator yoke 12. For example, in the internal rotor motor 200, the slot conductor 21 of the fourth coil 41 is located radially inside the slot conductor 21 of the first coil 31, so that after the first coil 31 of the first coil group 30 is installed in the stator slot 101, it does not affect the installation of the fourth coil 41 of the second coil group 40.

[0094] According to some embodiments of the present invention, such as Figures 7-13 As shown, in the same first coil group 30, the first circumferential conductor 34 of the first coil 31, the first circumferential conductor 34 of the second coil 32, and the first circumferential conductor 34 of the third coil 33 are arranged in sequence along the radial direction of the stator core 10. On the one hand, this ensures that the multiple first circumferential conductors 34 in the same first coil group 30 do not interfere with each other. On the other hand, it can effectively reduce the size of the stator winding 20 along the axial direction of the stator core 10, reduce the axial space occupied, and facilitate the miniaturization of the motor 200.

[0095] According to some embodiments of the present invention, such as Figures 14-18 As shown, in the same second coil group 40, the second circumferential conductor 44 of the fourth coil 41, the second circumferential conductor 44 of the fifth coil 42, and the second circumferential conductor 44 of the sixth coil 43 are arranged sequentially along the axial direction of the stator core 10 so that the circumferential conductors 212 do not interfere with each other. Furthermore, the conductor group 211 of each circumferential conductor 212 may include multiple conductors 212 arranged radially along the stator core 10, and the number of conductors in the conductor group 211 is set more flexibly.

[0096] According to some embodiments of the present invention, such as Figures 7-13As shown, in the first circumferential conductor 34, the multiple conductors 212 included in the single-layer conductor group 211 are arranged along the axial direction of the stator core 10. Correspondingly, the first connecting conductor 35 can extend substantially radially along the stator core 10. When winding the coil, the conductor 212 of the slot conductor 21 can be bent outward along the radial direction of the stator core 10, then bent circumferentially along the stator core 10, and then bent inward along the radial direction of the stator core 10 to wind one of the conductors 212 of the first connecting conductor 35 and the first circumferential conductor 34. In the entire winding process, the entire conductor group 211 of the slot conductor 21, the first circumferential conductor 34, and the first connecting conductor 35 can be obtained by bending and winding a single wire, eliminating the twisting and flaring processes of hairpin winding, greatly reducing the complexity of the process, improving manufacturing efficiency, and the multiple conductors 212 of the conductor group 211 are neat and orderly, which can significantly improve the yield rate and the performance of the stator 100.

[0097] According to some embodiments of the present invention, such as Figures 14-18 As shown, in the second circumferential conductor 44, the multiple conductors 212 included in the single-layer conductor group 211 are arranged radially along the stator core 10. Correspondingly, the second connecting conductor 45 can extend substantially along the axial direction of the stator core 10. When winding the coil, the conductor 212 of the slot conductor 21 can be extended outward along the axial direction of the stator core 10, then bent circumferentially along the stator core 10, and then extended inward along the axial direction of the stator core 10 to wind one of the conductors 212 of the second connecting conductor 45 and the second circumferential conductor 44. In the entire winding process, the entire conductor group 211 of the slot conductor 21, the second circumferential conductor 44, and the second connecting conductor 45 can be obtained by bending and winding a single wire, eliminating the twisting and flaring processes of hairpin winding, greatly reducing the complexity of the process, improving manufacturing efficiency, and the multiple conductors 212 of the conductor group 211 are neat and orderly, which can significantly improve the yield rate and the performance of the stator 100.

[0098] In some embodiments of the present invention, such as Figures 2-8 As shown, the stator winding 20 includes a multi-phase winding, and each phase winding includes multiple first coil groups 30 and multiple second coil groups 40, where multiple means two or more. All first coil groups 30 are arranged sequentially along the circumference of the stator core 10 according to a predetermined multi-phase order, and all second coil groups 40 are arranged sequentially along the circumference of the stator core 10 according to a predetermined multi-phase order. Furthermore, the first coil groups 30 and second coil groups 40 corresponding to the same phase are arranged alternately along the circumference of the stator core 10.

[0099] For example, such as Figures 2-8As shown, the stator winding 20 includes six first coil groups 30 and six second coil groups 40, and the stator winding 20 includes three-phase windings of phase A, phase B, and phase C, with each phase including two first coil groups 30 and two second coil groups 40. The six first coil groups 30 are arranged sequentially in the order of phase A, phase B, phase C, phase A, phase B, and phase C, and the six second coil groups 40 are arranged sequentially in the order of phase A, phase B, phase C, phase A, phase B, and phase C. The first coil groups 30 and second coil groups 40 corresponding to the same phase are arranged alternately, i.e., in the order of first coil group 30, second coil group 40, first coil group 30, second coil group 40; and the first coil groups 30 and second coil groups 40 corresponding to the same phase are arranged alternately, i.e., in the order of first coil group 30, second coil group 40, first coil group 30, second coil group 40.

[0100] By setting two different structures, the first coil group 30 and the second coil group 40 can meet the assembly requirements of the stator winding 20. The first coil group 30 and the second coil group 40 have strong applicability and fewer types of coil groups, which helps to reduce the difficulty of prefabricating coils and improve production efficiency.

[0101] In some specific embodiments, such as Figures 2-8 and Figures 19-20 As shown, each phase winding includes multiple branches connected in parallel. Each branch connects only the first coil 31, the second coil 32, and the third coil 33 of the first coil group 30 in series, or only the fourth coil 41, the fifth coil 42, and the sixth coil 43 of the second coil group 40 in series, or simultaneously connects the first coil 31, the second coil 32, and the third coil 33 of the first coil group 30 and the fourth coil 41, the fifth coil 42, and the sixth coil 43 of the second coil group 40 in series. Thus, each branch forms a non-full-turn arrangement, which facilitates the formation of more parallel branches, meeting the application requirements of low-voltage conditions. Furthermore, by connecting multiple coils located in the same first coil group 30 or the same second coil group 40 in series, the resistance differences between multiple coils can be balanced, thereby improving the performance of the stator 100.

[0102] Specifically, such as Figures 19-20 As shown, each phase winding includes two first coil groups 30 (denoted as 1# first coil group 30 and 2# first coil group 30) and two second coil groups 40 (denoted as 1# second coil group 40 and 2# second coil group 40), which are arranged along the circumference of the stator core 10 in the order of 1# first coil group 30, 1# second coil group 40, 2# first coil group 30 and 2# second coil group 40.

[0103] like Figure 19As shown, each phase winding forms two parallel branches. One branch connects the first coil 31, the second coil 32, and the third coil 33 of the first coil group 30 and the fourth coil 41, the fifth coil 42, and the sixth coil 43 of the second coil group 40. The other branch connects the first coil 31, the second coil 32, and the third coil 33 of the first coil group 30 and the fourth coil 41, the fifth coil 42, and the sixth coil 43 of the second coil group 40.

[0104] like Figure 20 As shown, each phase winding forms four parallel branches. The first branch connects the first coil 31, the second coil 32, and the third coil 33 of the first coil group 30 in series. The second branch connects the fourth coil 41, the fifth coil 42, and the sixth coil 43 of the second coil group 40 in series. The third branch connects the first coil 31, the second coil 32, and the third coil 33 of the first coil group 30 in series. The fourth branch connects the fourth coil 41, the fifth coil 42, and the sixth coil 43 of the second coil group 40 in series.

[0105] According to some embodiments of the present invention, the number of slots in the stator tooth 101 is 48, and the number of pole pairs corresponding to the stator 100 is 6, making the stator 100 more suitable for the application requirements of the automotive drive motor 200.

[0106] The stator 100 according to a specific embodiment of the present invention is described in detail below with reference to the accompanying drawings. It is to be understood that the following description is merely illustrative and should not be construed as limiting the invention.

[0107] According to some embodiments of the present invention, such as Figures 1-18 As shown, the stator 100 includes a stator core 10 and a stator winding 20. The stator core 10 includes a stator yoke 12 and 48 stator teeth 11. The 48 stator teeth 11 are disposed on the inner circumferential surface of the stator yoke 12 to define 48 stator tooth slots 101. The inner end of the stator teeth 11 is provided with a tooth shoe, and the stator teeth 11 are formed with an unequal width structure.

[0108] The stator winding 20 includes a three-phase pre-formed flat wire winding mounted on the stator core 10. Each phase winding consists of two pre-formed flat wire coil groups, namely a first coil group 30 and a second coil group 40. The first coil group 30 and the second coil group 40 corresponding to the same phase are arranged alternately in the circumferential direction. The first circumferential conductor 34 of the first coil group 30 is located in the axial space of the stator yoke 12, and the second circumferential conductor 44 of the second coil group 40 is located in the axial space of the stator slot 101.

[0109] The first coil group 30 includes three concentrically arranged coils: a first coil 31, a second coil 32, and a third coil 33. Between adjacent coils, the pitch of the outer coil is 2 units larger than the pitch of the inner coil. The first coil 31 is a short-pitch four-layer flat wire (single-layer conductor group 211) located in the radial outer ring of the stator slot 101. The second coil 32 is a full-pitch eight-layer flat wire (single-layer conductor group 211) located within the entire stator slot 101 of the stator core 10. The third coil 33 is a long-pitch four-layer flat wire (single-layer conductor group 211), with the slot conductors 21 of adjacent third coils 33 located in the radial outer and radial inner rings of the stator slot 101, respectively. The ends of the first coil group 30 are arranged radially in the space of the stator yoke 12 as the first coil 31, the second coil 32, and the third coil 33, with no radial interference between the conductors 212.

[0110] The second coil group 40 includes three concentrically arranged coils: the fourth coil 41, the fifth coil 42, and the sixth coil 43. Between adjacent coils, the pitch of the outer coil is 2 units larger than that of the inner coil. The sixth coil 43 is a long-pitch four-layer flat wire (single-layer conductor group 211), with adjacent sixth coils 43 located radially inner and outer rings of the stator slot 101, respectively. The fifth coil 42 is a full-pitch eight-layer flat wire (single-layer conductor group 211), located within the entire stator slot 101 of the stator core 10. The fourth coil 41 is a short-pitch four-layer flat wire (single-layer conductor group 211), located radially inner ring of the stator slot 101. The ends of the second coil group 40 are perpendicular to the stator core 10, and their ends are arranged axially along the stator core 10 as the fourth coil 41, the fifth coil 42, and the sixth coil 43, with no axial interference among the conductors 212.

[0111] By using flat wire winding prefabrication, the entire production process eliminates the need for twisting and flaring of hairpin windings, greatly reducing complex procedures, improving the manufacturing efficiency of stator 100, and increasing the pass rate.

[0112] like Figure 21 As shown, the motor 200 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 the embodiment of the present invention has the aforementioned beneficial technical effects, the motor 200 according to the embodiment of the present invention, by prefabricating a first coil 31, a second coil 32, a third coil 33, a fourth coil 41, a fifth coil 42, and a sixth coil 43 to form a first coil group 30 and a second coil group 40, and orderly installing them within the stator slots 101 of the stator core 10, can avoid mutual interference between the coils, reduce the difficulty of the assembly process, and improve production efficiency and yield. Furthermore, the number of coils and the number of conductors included in each coil are easily adjustable, facilitating the fulfillment of different application requirements of the motor 200.

[0113] like Figure 21As shown, the vehicle 300 according to an embodiment of the present invention includes a motor 200 according to an embodiment of the present invention. Since the motor 200 according to the embodiment of the present invention has the aforementioned beneficial technical effects, the vehicle 300 according to the embodiment of the present invention, by prefabricating a first coil 31, a second coil 32, a third coil 33, a fourth coil 41, a fifth coil 42, and a sixth coil 43 to form a first coil group 30 and a second coil group 40, and orderly installing them within the stator slots 101 of the stator core 10, can avoid interference between the coils, reduce the difficulty of the assembly process, and improve production efficiency and yield. Furthermore, the number of coils and the number of conductors included in each coil are easily adjustable, facilitating the fulfillment of the application requirements of different motors 200.

[0114] Here, vehicle 300 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with motor 200 as the main driving force. In other embodiments, the new energy vehicle can also be a hybrid vehicle with both an internal combustion engine and motor 200 as the main driving force. Regarding the internal combustion engine and motor 200 mentioned in the above embodiments that provide driving power for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to motor 200 can be a power battery, hydrogen fuel cell, etc., without special limitation. It should be noted that this is merely an exemplary description of the structure of new energy vehicles, etc., and is not intended to limit the scope of protection of this invention.

[0115] Other configurations and operations of the vehicle 300 and motor 200 according to 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 invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention 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 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, characterized in that, include: A stator core having multiple stator slots; The stator winding includes multiple first coil groups and multiple second coil groups mounted on the stator core. Each first coil group includes a first coil, at least one second coil, and a third coil arranged concentrically with increasing pitch. Each second coil group includes a fourth coil, at least one fifth coil, and a sixth coil arranged concentrically with increasing pitch. Each of the first, second, third, fourth, fifth, and sixth coils includes two slot conductors. The pitch of the first and fourth coils is greater than or equal to 4. All the first, second, third, fourth, fifth, and sixth coils are prefabricated coils. Multiple first coil groups are distributed circumferentially along the stator core, and adjacent slot conductors of two adjacent third coils are located in the same stator slot. A slot conductor of the second coil is located in the stator slot between the slot conductors of the first coils and the slot conductors of the third coils. Multiple second coil groups are distributed circumferentially along the stator core, and adjacent slot conductors of two adjacent sixth coils are located in the same stator slot. The slot conductor of the fifth coil is located in the stator slot between the slot conductor of the fourth coil and the slot conductor of the sixth coil. Each slot conductor of the fourth coil is located in the same stator slot as one slot conductor of the first coil.

2. The stator according to claim 1, characterized in that, The number of conductors included in the slot conductors of the first coil, the slot conductors of the third coil, the slot conductors of the fourth coil, and the slot conductors of the sixth coil are equal and are all n. The number of conductors included in the slot conductors of the second coil and the slot conductors of the fifth coil are equal and are all N, where N / n = 2.

3. The stator according to claim 1, characterized in that, The slot conductor includes a single conductor group or multiple conductor groups arranged circumferentially along the stator core, each conductor group including multiple conductors arranged radially along the stator core.

4. The stator according to claim 1, characterized in that, The two slot conductors located in the same stator slot are arranged radially along the stator core.

5. The stator according to claim 1, characterized in that, In the circumferential direction of the stator core, the slot width of the stator tooth is W, and the slot opening width of the stator tooth is L, where 0.5W≤L≤0.9W.

6. The stator according to claim 1, characterized in that, The first coil, the second coil, and the third coil each include two slot conductors, two first circumferential conductors, and four first connecting conductors connecting the slot conductors and the first circumferential conductors. The first circumferential conductors extend circumferentially along the stator core, and the first connecting conductors extend radially along the stator core. The fourth, fifth, and sixth coils each include two slot conductors, two second circumferential conductors, and four second connecting conductors connecting the slot conductors and the second circumferential conductors. The second circumferential conductors extend circumferentially along the stator core, and the second connecting conductors extend axially along the stator core.

7. The stator according to claim 6, characterized in that, The stator core includes an annular stator yoke and a plurality of stator teeth arranged circumferentially along the stator yoke. The first circumferential conductor is located on the axial outer side of the stator yoke, and the second circumferential conductor is located on the axial outer side of the stator teeth.

8. The stator according to claim 7, characterized in that, In the axial direction of the stator core, the second circumferential conductor is located on the side of the first circumferential conductor away from the stator core.

9. The stator according to claim 7, characterized in that, Within the same stator slot, the slot conductor of the fourth coil is located on the side of the slot conductor of the first coil away from the stator yoke.

10. The stator according to claim 7, characterized in that, In the same first coil group, the first circumferential conductors of the first coil, the second coil and the third coil are arranged sequentially along the radial direction of the stator core; In the same second coil group, the second circumferential conductors of the fourth coil, the fifth coil and the sixth coil are arranged sequentially along the axial direction of the stator core.

11. The stator according to any one of claims 1-10, characterized in that, The stator winding includes a multi-phase winding, with the first coil group and the second coil group corresponding to the same phase arranged alternately along the circumference of the stator core. Each phase winding includes multiple branches connected in parallel, and each branch is connected in series with the first coil, the second coil and the third coil of the first coil group, and / or in series with the fourth coil, the fifth coil and the sixth coil of the second coil group.

12. The stator according to any one of claims 1-10, characterized in that, The stator has 48 slots and 6 pole pairs.

13. An electric motor, characterized in that, Includes the stator according to any one of claims 1-12.

14. A vehicle, characterized in that, Includes the motor according to claim 13.

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