Stator winding, stator and motor

Abstract

The utility model provides a stator winding, a stator and a motor, any phase of winding comprises at least two branches, a wire inlet end and a wire outlet end of each branch are located at two radial sides of a stator iron core, each branch comprises a plurality of winding units which are connected in sequence, and the winding units are arranged in the stator iron core. Each winding unit comprises a plurality of conductors which are sequentially connected in the radial direction of the stator core from the inner layer to the outer layer or from the outer layer to the inner layer, and the connection directions of the plurality of conductors in two adjacent winding units are opposite; the plurality of winding units are arranged into at least two groups, the number of the winding units in each group is at least one, the plurality of winding units in each group are sequentially connected from left to right or from right to left along the circumferential direction of the stator core, and the connection directions of the winding units in two adjacent groups are opposite. The potential difference between the radial adjacent welding spots of the stator winding is small, and the insulation requirement is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and particularly relates to a stator winding, a stator and a motor. Background Art

[0002] In the existing technology, the potential difference between radially adjacent solder joints of the stator winding is large, and the insulation requirement between the solder joints is high. Summary of the Invention

[0003] In view of the above problems, the utility model provides a stator winding, a stator and a motor to solve the above or other previous problems existing in the existing technology.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a stator winding, in which any phase winding includes at least two branches, the inlet end and the outlet end of each branch are located on the radial two sides of the stator core, each branch includes a plurality of sequentially connected winding units, the winding unit includes a plurality of conductors sequentially connected in the radial direction of the stator core from the inner layer to the outer layer or from the outer layer to the inner layer, and the connection directions of the conductors in adjacent two winding units are opposite;

[0005] The plurality of winding units are arranged into at least two groups, the number of winding units in each group is at least one, the plurality of winding units in each group are sequentially connected along the circumferential direction of the stator core from left to right or from right to left, and the connection directions of the winding units in adjacent two groups are opposite.

[0006] Further, along the radial direction of the stator core, any winding unit includes:

[0007] A first conductor or a second conductor or an eighth conductor arranged at the innermost layer in the radial direction;

[0008] A third conductor or a fourth conductor or a ninth conductor arranged at the outermost layer in the radial direction;

[0009] At least two fifth conductors or sixth conductors or seventh conductors or tenth conductors arranged between the innermost layer and the outermost layer in the radial direction, and the fifth conductor, the sixth conductor, the seventh conductor or the tenth conductor are arranged on two adjacent layers in the radial direction of the stator core.

[0010] Further, along the radial direction of the stator core, any winding unit includes:

[0011] At least two fifth conductors or sixth conductors or seventh conductors or tenth conductors arranged between the innermost layer and the outermost layer in the radial direction, and the fifth conductor, the sixth conductor, the seventh conductor or the tenth conductor are arranged on two adjacent layers in the radial direction of the stator core.

[0012] Further, along the radial direction of the stator core, any winding unit includes:

[0013] The first conductor, the second conductor, or the eighth conductor disposed at the innermost radial layer; or, the third conductor, the fourth conductor, or the ninth conductor disposed at the outermost radial layer;

[0014] At least two of the fifth conductor, the sixth conductor, the seventh conductor, or the tenth conductor disposed between the innermost and outermost radial layers, and the fifth conductor, the sixth conductor, the seventh conductor, or the tenth conductor are disposed in two adjacent radial layers of the stator core.

[0015] Furthermore, each winding unit is disposed within one magnetic pole, and the incoming end and the outgoing end of each branch are located on the two radial sides of the same magnetic pole of the stator core.

[0016] Furthermore, when each branch is wound in a stacked manner, multiple winding units in each group are disposed in at least several magnetic poles, or, multiple winding units in each group cover all magnetic poles and at least one magnetic pole is provided with at least two winding units.

[0017] Furthermore, along the circumferential direction of the stator core, both sets of corresponding slots of the first conductor and the second conductor are disposed in two slots separated by at least one slot.

[0018] Furthermore, along the circumferential direction of the stator core, both sets of corresponding slots of the third conductor and the fourth conductor are disposed in two adjacent slots.

[0019] Furthermore, along the circumferential direction of the stator core, both sets of corresponding slots of the fifth conductor, the sixth conductor, and the seventh conductor are disposed in three adjacent slots.

[0020] Furthermore, the number of radial layers of the stator core is an even number greater than or equal to 4.

[0021] A stator includes the stator winding as described above.

[0022] A motor includes the stator as described above.

[0023] Due to the adoption of the above technical solution, each phase winding of the stator winding has at least two branch windings, and each branch winding has a plurality of winding units connected in sequence. The plurality of winding units are arranged in at least two groups and have at least one turning point. The connection modes of the plurality of winding units in adjacent two groups are opposite. The plurality of winding units in one group are connected in sequence from left to right along the circumferential direction of the stator core, and the plurality of winding units in the other group are connected in sequence from right to left along the circumferential direction of the stator core. In each winding unit, there are a plurality of conductors connected in sequence along the radial direction of the stator core, and the connection directions of the plurality of conductors in adjacent two winding units are opposite. The plurality of conductors in one winding unit are connected from the radial inner layer to the radial outer layer, and the plurality of conductors in the other winding unit are connected from the radial outer layer to the radial inner layer. The inlet end and the outlet end of each branch are located within the same magnetic pole and at the two radial ends of the magnetic pole, so that each branch winding is a complete overlapping winding structure, the potential difference between the radially adjacent solder joints of the stator winding is small, and the insulation requirement is relatively low. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram (plug-in end and welding end) of the first branch winding of the first embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram (plug-in end and welding end) of the second branch winding of the first embodiment of the present invention;

[0026] Figure 3 is a schematic structural diagram (plug-in end and welding end) of the first branch winding of the second embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram (plug-in end and welding end) of the second branch winding of the second embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram (plug-in end and welding end) of the first branch winding of the third embodiment of the present invention;

[0029] Figure 6 is a schematic structural diagram (plug-in end and welding end) of the second branch winding of the third embodiment of the present invention;

[0030] Figure 7 is a schematic structural diagram (plug-in end and welding end) of the first branch winding of the fourth embodiment of the present invention;

[0031] Figure 8 is a schematic structural diagram (plug-in end and welding end) of the second branch winding of the fourth embodiment of the present invention;

[0032] Figure 9Schematic diagram of the structure of the first branch winding in the fifth embodiment of the present utility model (plug-in end and welding end);

[0033] Figure 10 Schematic diagram of the structure of the second branch winding in the fifth embodiment of the present utility model (plug-in end and welding end);

[0034] Figure 11 Schematic diagram of the structure of the first branch winding in the sixth embodiment of the present utility model (plug-in end and welding end);

[0035] Figure 12 Schematic diagram of the structure of the second branch winding in the sixth embodiment of the present utility model (plug-in end and welding end);

[0036] Figure 13 Schematic diagram of the structure of the first branch winding in the seventh embodiment of the present utility model (plug-in end and welding end);

[0037] Figure 14 Schematic diagram of the structure of the second branch winding in the seventh embodiment of the present utility model (plug-in end and welding end);

[0038] Figure 15 Schematic diagram of the structure of the first branch winding in the eighth embodiment of the present utility model (plug-in end and welding end);

[0039] Figure 16 Schematic diagram of the structure of the second branch winding in the eighth embodiment of the present utility model (plug-in end and welding end);

[0040] Figure 17 Schematic diagram of the structure of the first branch winding in the ninth embodiment of the present utility model (plug-in end and welding end);

[0041] Figure 18 Schematic diagram of the structure of the second branch winding in the ninth embodiment of the present utility model (plug-in end and welding end);

[0042] Figure 19 Schematic diagram of the structure of the first branch winding in the tenth embodiment of the present utility model (plug-in end and welding end);

[0043] Figure 20 Schematic diagram of the structure of the second branch winding in the tenth embodiment of the present utility model (plug-in end and welding end);

[0044] Figure 21 Schematic diagram of the structure of the first branch winding in the eleventh embodiment of the present utility model (plug-in end and welding end);

[0045] Figure 22 Schematic diagram of the structure of the second branch winding in the eleventh embodiment of the present utility model (plug-in end and welding end).

[0046] In the figure:

[0047] 10. First coil unit, 11. Eighth conductor, 20. Second coil unit

[0048] 21. Ninth conductor, 30. Third coil unit, 31. Tenth conductor

[0049] 32. Fourth coil unit, 100. First conductor, 101. Second conductor

[0050] 200. Third conductor, 201. Fourth conductor, 300. Fifth conductor

[0051] 301. Sixth conductor, 302. Seventh conductor, 1. Winding unit Detailed implementation manners

[0052] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0053] Figure 1-22 The structural schematic diagrams of some embodiments of the present utility model are shown. This embodiment relates to a stator winding, a stator and a motor. The inlet end and the outlet end of any branch are respectively located on the radial two sides of the stator core. Each branch is completely wound in a stacked manner, so that the potential difference between the radially adjacent solder joints of the stator winding is small, and the insulation requirement is relatively low.

[0054] A stator winding, as Figure 1-22 shown, includes three-phase windings. The number of slots per pole per phase is 3. In any one-phase winding, it includes at least two branches, and a plurality of branch windings are arranged in parallel. The number of branch windings in each phase winding is selected and set according to actual needs, and no specific requirements are made here; each branch includes:

[0055] In any one-phase winding, the inlet end and the outlet end of each branch winding are located on the radial two sides of the stator core, that is, the inlet end and the outlet end of each branch winding are respectively located at the innermost layer and the outermost layer in the radial direction of the stator core, or the inlet end and / or the outlet end of each branch winding are respectively located near the innermost layer and near the outermost layer in the radial direction of the stator core. Specifically, at the welding end, in any one-phase winding, the inlet end and the outlet end can be respectively located at the innermost layer and the outermost layer in the radial direction of the stator core, or the inlet end is located at the innermost layer in the radial direction of the stator core, and the outlet end is located near the outermost layer in the radial direction of the stator core, such as the (outermost layer - 1) layer, or the inlet end is located near the innermost layer in the radial direction of the stator core, such as the (innermost layer + 1) layer, and the outlet end is located at the outermost layer in the radial direction of the stator core, or the inlet end and the outlet end are respectively located near the innermost layer and the outermost layer in the radial direction of the stator core. The setting of the inlet end and the outlet end of any branch winding is selected according to actual needs, and no specific requirements are made here.

[0056] Each branch winding includes a plurality of sequentially connected winding units 1. The winding unit 1 includes a plurality of conductors sequentially connected in the radial direction of the stator core from the inner layer to the outer layer or from the outer layer to the inner layer. The connection directions of the plurality of conductors in two adjacent winding units 1 are opposite. That is, in order to realize the structure of a branch winding, a plurality of winding units 1 are sequentially connected. The outgoing end of one winding unit 1 is connected to the incoming end of another adjacent winding unit 1. The plurality of conductors in each winding unit 1 are sequentially arranged in the radial direction of the stator core from the inner layer to the outer layer or from the outer layer to the inner layer. When two adjacent winding units 1 are connected, the connection direction of the plurality of conductors in one winding unit 1 is sequentially connected from the innermost radial layer to the outermost radial layer of the stator core, and the connection direction of the plurality of conductors in the other winding unit 1 is sequentially connected from the outermost radial layer to the innermost radial layer of the stator core. The connection directions of the plurality of conductors in the two winding units 1 are opposite. The plurality of winding units 1 are sequentially arranged in the circumferential direction of the stator core. Then, in a branch winding, the connection route of each conductor is in an S shape, that is, it is connected along both the radial direction and the circumferential direction of the stator core.

[0057] The plurality of winding units 1 are arranged in at least two groups. The number of winding units 1 in each group is at least one. The plurality of winding units 1 in each group are sequentially connected from left to right or from right to left in the circumferential direction of the stator core. The connection directions of the winding units 1 in two adjacent groups are opposite. In a branch winding, along the circumferential direction of the stator core, there is at least one turning point. At the turning point, the connection direction of the winding unit 1 is reversed. The plurality of winding units 1 in one group are sequentially connected from left to right in the circumferential direction of the stator core. After reaching the turning point, they are connected to the plurality of winding units 1 in another group. The plurality of winding units 1 in the other group are sequentially connected from right to left in the circumferential direction of the stator core.

[0058] According to the above connection method, each branch winding is formed by stacking complete coil units. In each branch winding, along the circumferential direction of the stator core, a plurality of connected winding units 1 are sequentially arranged to construct the branch winding structure. Each winding unit 1 is arranged within a magnetic pole. The number of winding units 1 is selected according to actual requirements and will not be specifically required here. In each branch winding, multiple winding units 1 in each group are arranged in at least several magnetic poles, that is, multiple winding units 1 in each group can cover all magnetic poles, or can be arranged only in some magnetic poles, and not all magnetic poles are provided with winding units 1. Or, multiple winding units 1 in each group cover all magnetic poles and at least one magnetic pole is provided with at least two winding units 1. The arrangement method of multiple winding units 1 in each group is selected according to actual requirements. Within each magnetic pole, one winding unit 1 can be arranged, or multiple winding units 1 can be arranged. The number of winding units 1 within each magnetic pole is selected according to actual requirements.

[0059] Along the radial direction of the stator core, any winding unit 1 includes: a first conductor 100 or a second conductor 101 or an eighth conductor 11 arranged at the innermost radial layer; a third conductor 200 or a fourth conductor 201 or a ninth conductor 21 arranged at the outermost radial layer; at least two fifth conductors 300 or sixth conductors 301 or seventh conductors 302 or tenth conductors 31 arranged between the innermost and outermost radial layers. The fifth conductors 300, sixth conductors 301, seventh conductors 302 or tenth conductors 31 are arranged in two adjacent radial layers of the stator core. That is, in any winding unit 1, it includes a conductor arranged at the innermost radial layer, at least two conductors arranged between the innermost and outermost radial layers, and a conductor arranged at the outermost radial layer, which are sequentially connected. The conductor arranged at the innermost radial layer can be the first conductor 100, or the second conductor 101, or the eighth conductor 11. In different winding units 1, the conductors arranged at the innermost radial layer can be the same or different, and are selected according to actual requirements. The conductor arranged at the outermost radial layer can be the third conductor 200, or the fourth conductor 201, or the ninth conductor 21. In different winding units 1, the conductors arranged at the outermost radial layer can be the same or different, and are selected according to actual requirements. The multiple conductors arranged between the innermost and outermost radial layers can all be fifth conductors 300, or all be sixth conductors 301, or all be seventh conductors 302, or all be tenth conductors 31. In different winding units 1, the conductors arranged between the innermost and outermost radial layers can be the same or different, and are selected according to actual requirements.

[0060] Alternatively, along the radial direction of the stator core, at least two of the fifth conductor 300, sixth conductor 301, seventh conductor 302, or tenth conductor 31 disposed between the innermost and outermost radial layers, and the fifth conductor 300, sixth conductor 301, seventh conductor 302, or tenth conductor 31 are disposed in two adjacent radial layers of the stator core; that is, the conductors disposed between the innermost and outermost radial layers can all be the fifth conductor 300, or all be the sixth conductor 301, or all be the seventh conductor 302, or all be the tenth conductor 31. In different winding units 1, the conductors disposed in the innermost and outermost radial layers can be the same or different, and are selected according to actual requirements.

[0061] Alternatively, along the radial direction of the stator core, any winding unit 1 includes: the first conductor 100, second conductor 101, or eighth conductor 11 disposed in the innermost radial layer; or, the third conductor 200, fourth conductor 201, or ninth conductor 21 disposed in the outermost radial layer; at least two of the fifth conductor 300, sixth conductor 301, seventh conductor 302, or tenth conductor 31 disposed between the innermost and outermost radial layers, and the fifth conductor 300, sixth conductor 301, seventh conductor 302, or tenth conductor 31 are disposed in two adjacent radial layers of the stator core; that is, along the radial direction of the stator core, any winding unit 1 includes a conductor disposed in the innermost radial layer and multiple conductors disposed between the innermost and outermost radial layers, or any winding unit 1 includes a conductor disposed in the outermost radial layer and multiple conductors disposed between the innermost and outermost radial layers, and is selected and arranged according to actual requirements. Among them, in any winding unit 1, the conductor disposed in the innermost radial layer can be the first conductor 100, or the second conductor 101, or the eighth conductor 11. In different winding units 1, the conductors disposed in the innermost radial layer can be the same or different, and are selected according to actual requirements; the conductor disposed in the outermost radial layer can be the third conductor 200, or the fourth conductor 201, or the ninth conductor 21. In different winding units 1, the conductors disposed in the outermost radial layer can be the same or different, and are selected according to actual requirements; the multiple conductors disposed between the innermost and outermost radial layers can all be the fifth conductor 300, or all be the sixth conductor 301, or all be the seventh conductor 302, or all be the tenth conductor 31. In different winding units 1, the conductors disposed in the innermost and outermost radial layers can be the same or different, and are selected according to actual requirements.

[0062] When multiple winding units 1 are connected, the outgoing wire positions of two adjacent winding units 1 are different and are respectively located on the radial two sides of the stator core. That is, it is set that one radial side of the stator core is the A end, and the other radial side of the stator core is the B end. If the outgoing wire position of the first winding unit 1 is located at the A end, then the incoming wire position of the second winding unit 1 connected thereto is located at the A end, and the outgoing wire position is located at the B end. The outgoing wire of the first winding unit 1 is connected to the incoming wire of the second winding unit 1. The incoming wire of the third winding unit 1 is located at the B end, and the outgoing wire is located at the A end. The outgoing wire of the second winding unit 1 is connected to the incoming wire of the third winding unit 1,... Multiple winding units 1 are connected in sequence to form a branch winding structure. At the same time, the incoming wire end and the outgoing wire end of this branch winding structure are both located within the same magnetic pole of the stator core, preferably on the radial two sides of the stator core of this magnetic pole.

[0063] When multiple winding units 1 are connected, they can be connected in sequence along the circumferential direction of the stator core, connected in sequence from left to right along the circumferential direction of the stator core, and then connected in sequence from right to left. Or, any two adjacent winding units 1 are connected from left to right along the circumferential direction of the stator core, and then connected from right to left. After at least one folding connection, then connected to other winding units 1 from left to right or from right to left along the circumferential direction of the stator core, or other connection methods, which are selected according to actual needs and are not specifically required here.

[0064] Both the above-mentioned eighth conductor 11 and ninth conductor 21 are single conductors. In some embodiments that can be implemented, the pitch of this conductor can be 7, 8, 9, or 10, which is selected according to actual needs and is not specifically required here.

[0065] Along the circumferential direction of the stator core, the two sets of corresponding slots of the first conductor 100 and the second conductor 101 are both arranged in two slots separated by at least one slot. That is, the first conductor 100 and the second conductor 101 form a conductor group structure, which is set as the first coil unit 10.

[0066] Along the circumferential direction of the stator core, the two sets of corresponding slots of the third conductor 200 and the fourth conductor 201 are both arranged in at least two adjacent slots. That is, the third conductor 200 and the fourth conductor 201 form a conductor group structure, which is set as the second coil unit 20.

[0067] In the first embodiment that can be implemented, the pitch of the first conductor 100 is greater than the pitch of the second conductor 101. The pitch of the first conductor 100 can be 9, and the pitch of the second conductor 101 can be 7. The pitch of the third conductor 200 is greater than the pitch of the fourth conductor 201. The pitch of the third conductor 200 is 11, and the pitch of the fourth conductor 201 can be 7.

[0068] The above-mentioned tenth conductor 31 is a single conductor structure. In some feasible embodiments, the pitch of this conductor can be 8, 9 or 10, or other pitches, which can be selected according to actual requirements and no specific requirements are made here.

[0069] Along the circumferential direction of the stator core, two sets of corresponding slots of the fifth conductor 300 and the sixth conductor 301 are both arranged in two slots separated by at least one slot, that is, the fifth conductor 300 and the sixth conductor 301 form a conductor group structure, designated as the fourth coil unit 32.

[0070] In the first feasible embodiment, the pitch of the fifth conductor 300 can be the same as the pitch of the sixth conductor 301. The pitch of the fifth conductor 300 can be 8, 9 or 10, and the pitch of the sixth conductor 301 can be 8, 9 or 10, or other pitches, which can be selected according to actual requirements and no specific requirements are made here.

[0071] Along the circumferential direction of the stator core, the fifth conductor 300, the sixth conductor 301 and the seventh conductor 302 are arranged in three adjacent slots, that is, the fifth conductor 300, the sixth conductor 301 and the seventh conductor 302 form a conductor group structure, designated as the third coil unit 30. In some feasible embodiments, the pitches of the fifth conductor 300, the sixth conductor 301 and the seventh conductor 302 can be the same. The pitch of the fifth conductor 300 can be 8, 9 or 10, the pitch of the sixth conductor 301 can be 8, 9 or 10, and the pitch of the seventh conductor 302 can be 8, 9 or 10, or other pitches, which can be selected according to actual requirements and no specific requirements are made here.

[0072] In some feasible embodiments, the radial number of layers of the stator core is an even number greater than or equal to 4, which can be 6 layers, or 8 layers, or other even layers, which can be selected according to actual requirements and no specific requirements are made here.

[0073] A stator includes the above-mentioned stator winding.

[0074] A motor includes the above-mentioned stator.

[0075] The following will be described in detail with some embodiments.

[0076] In the following some embodiments, the stator winding is installed on the stator core. The stator winding has three-phase windings. The stator core has 54 slots. Each phase of the stator winding includes two branch windings, and the number of slots per pole per phase is 3.

[0077] Embodiment 1

[0078] As Figure 1 and 2As shown, the stator core has 6 radial layers. In the first branch winding of the stator winding, it includes nine winding units 1 connected in sequence. Among the nine winding units 1, the first five winding units 1 are connected in sequence along the circumferential direction of the stator core from left to right, and the last four winding units 1 are connected in sequence along the circumferential direction of the stator core from right to left.

[0079] Specifically, in the first winding unit 1, it includes the fifth conductors 300 located in slots 10 of the fourth layer and slot 19 of the fifth layer, and the fifth conductors 300 located in slot 10 of the second layer and slot 19 of the third layer, which are connected in sequence; in the second winding unit 1, it includes the eighth conductor 11 located in slots 19 and 29 of the first layer, the sixth conductor 301 located in slot 20 of the second layer and slot 29 of the third layer, the sixth conductor 301 located in slot 20 of the fourth layer and slot 29 of the fifth layer, and the ninth conductor 21 located in slots 20 and 30 of the sixth layer, which are connected in sequence; in the third winding unit 1, it includes the sixth conductor 301 located in slot 30 of the fourth layer and slot 39 of the fifth layer, and the sixth conductor 301 located in slot 30 of the second layer and slot 39 of the third layer, which are connected in sequence; in the fourth winding unit 1, it includes the eighth conductor 11 located in slots 39 and 46 of the first layer, the fifth conductor 300 located in slot 37 of the second layer and slot 46 of the third layer, the fifth conductor 300 located in slot 37 of the fourth layer and slot 46 of the fifth layer, and the ninth conductor 21 located in slots 37 and 47 of the sixth layer, which are connected in sequence; in the fifth winding unit 1, it includes the tenth conductor 31 located in slot 47 of the fourth layer and slot 02 of the fifth layer, the tenth conductor 31 located in slot 47 of the second layer and slot 02 of the third layer, and the eighth conductor 11 located in slots 48 and 02 of the first layer, which are connected in sequence; in the sixth winding unit 1, it includes the sixth conductor 301 located in slot 39 of the second layer and slot 48 of the third layer, and the sixth conductor 301 located in slot 39 of the fourth layer and slot 48 of the fifth layer, which are connected in sequence; in the seventh winding unit 1, it includes the ninth conductor 21 located in slots 29 and 39 of the sixth layer, the fifth conductor 300 located in slot 29 of the fourth layer and slot 38 of the fifth layer, the fifth conductor 300 located in slot 29 of the second layer and slot 38 of the third layer, and the eighth conductor 11 located in slots 28 and 38 of the first layer, which are connected in sequence; in the eighth winding unit 1, it includes the fifth conductor 300 located in slot 19 of the second layer and slot 28 of the third layer, and the fifth conductor 300 located in slot 19 of the fourth layer and slot 28 of the fifth layer, which are connected in sequence; in the ninth winding unit 1, it includes the ninth conductor 21 located in slots 12 and 19 of the sixth layer, the sixth conductor 301 located in slot 12 of the fourth layer and slot 21 of the fifth layer, the sixth conductor 301 located in slot 12 of the second layer and slot 21 of the third layer, and the eighth conductor 11 located in slots 11 and 21 of the first layer, which are connected in sequence.

[0080] In this branch winding, the incoming line end, the welding end of the 19th slot in the fourth layer, the welding end of the 10th slot in the third layer, the welding end of the 19th slot in the third layer, the welding end of the 10th slot in the second layer, the welding end of the 19th slot in the first layer, the welding end of the 29th slot in the first layer, the welding end of the 20th slot in the second layer, the welding end of the 29th slot in the third layer, the welding end of the 20th slot in the fourth layer, the welding end of the 29th slot in the fifth layer, the welding end of the 20th slot in the sixth layer, the welding end of the 30th slot in the sixth layer, the welding end of the 39th slot in the fifth layer, the welding end of the 30th slot in the fourth layer, the welding end of the 39th slot in the third layer, the welding end of the 30th slot in the second layer, the welding end of the 39th slot in the first layer, the welding end of the 46th slot in the first layer, the welding end of the 37th slot in the second layer, the welding end of the 46th slot in the third layer, the welding end of the 37th slot in the fourth layer, the welding end of the 46th slot in the fifth layer, the welding end of the 37th slot in the sixth layer, the welding end of the 47th slot in the sixth layer, the welding end of the 02nd slot in the fifth layer, the welding end of the 47th slot in the fourth layer, the welding end of the 02nd slot in the third layer, the welding end of the 47th slot in the second layer, the welding end of the 02nd slot in the first layer, the welding end of the 48th slot in the first layer, the welding end of the 39th slot in the second layer, the welding end of the 48th slot in the third layer, the welding end of the 39th slot in the fourth layer, the welding end of the 48th slot in the fifth layer, the welding end of the 39th slot in the sixth layer, the welding end of the 29th slot in the sixth layer, the welding end of the 38th slot in the fifth layer, the welding end of the 29th slot in the fourth layer, the welding end of the 38th slot in the third layer, the welding end of the 29th slot in the second layer, the welding end of the 38th slot in the first layer, the welding end of the 28th slot in the first layer, the welding end of the 19th slot in the second layer, the welding end of the 28th slot in the third layer, the welding end of the 19th slot in the fourth layer, the welding end of the 28th slot in the fifth layer, the welding end of the 19th slot in the sixth layer, the welding end of the 12th slot in the sixth layer, the welding end of the 21st slot in the fifth layer, the welding end of the 12th slot in the fourth layer, the welding end of the 21st slot in the third layer, the welding end of the 12th slot in the second layer, the welding end of the 21st slot in the first layer, the welding end of the 11th slot in the first layer, and the outgoing line end are connected in sequence; thus forming the structure of the first branch winding.

[0081] In the second branch winding of the stator winding, it includes nine winding units 1 connected in sequence. Among the nine winding units 1, the first seven winding units 1 are connected in sequence from left to right along the circumferential direction of the stator core, the eighth winding unit 1 is connected from right to left along the circumferential direction of the stator core, and the ninth winding unit 1 is connected in sequence from left to right along the circumferential direction of the stator core.

[0082] Specifically, in the first winding unit 1, it includes the seventh conductor 302 located in the second layer, slot 2 and the third layer, slot 11, which are connected in sequence, the seventh conductor 302 located in the fourth layer, slot 2 and the fifth layer, slot 11, and the third conductor 200 located in the sixth layer, slot 02 and slot 11; in the second winding unit 1, it includes the tenth conductor 31 located in the fourth layer, slot 11 and the fifth layer, slot 20, which are connected in sequence, and the tenth conductor 31 located in the second layer, slot 11 and the third layer, slot 20; in the third winding unit 1, it includes the eighth conductor 11 located in the first layer, slot 20 and slot 30, which are connected in sequence, the tenth conductor 31 located in the second layer, slot 21 and the third layer, slot 30, the tenth conductor 31 located in the fourth layer, slot 21 and the fifth layer, slot 30, and the ninth conductor 21 located in the sixth layer, slot 21 and slot 28; in the fourth winding unit 1, it includes the tenth conductor 31 located in the fourth layer, slot 28 and the fifth layer, slot 37, which are connected in sequence, and the tenth conductor 31 located in the second layer, slot 28 and the third layer, slot 37; in the fifth winding unit 1, it includes the eighth conductor 11 located in the first layer, slot 37 and slot 47, which are connected in sequence, the tenth conductor 31 located in the second layer, slot 38 and the third layer, slot 47, the tenth conductor 31 located in the fourth layer, slot 38 and the fifth layer, slot 47, and the ninth conductor 21 located in the sixth layer, slot 38 and slot 48; in the sixth winding unit 1, it includes the sixth conductor 301 located in the fourth layer, slot 48 and the fifth layer, slot 03, which are connected in sequence, and the sixth conductor 301 located in the second layer, slot 48 and the third layer, slot 03; in the seventh winding unit 1, it includes the second conductor 101 located in the first layer, slot 03 and slot 10, which are connected in sequence, the fifth conductor 300 located in the second layer, slot 01 and the third layer, slot 10, the fifth conductor 300 located in the fourth layer, slot 01 and the fifth layer, slot 10, and the ninth conductor 21 located in the sixth layer, slot 01 and slot 46; in the eighth winding unit 1, it includes the fifth conductor 300 located in the fourth layer, slot 46 and the fifth layer, slot 01, which are connected in sequence, and the fifth conductor 300 located in the second layer, slot 46 and the third layer, slot 01; in the ninth winding unit 1, it includes the first conductor 100 located in the first layer, slot 01 and slot 12, the sixth conductor 301 located in the second layer, slot 03 and the third layer, slot 12, the sixth conductor 301 located in the fourth layer, slot 03 and the fifth layer, slot 12, and the fourth conductor 201 located in the sixth layer, slot 03 and slot 10.

[0083] In this branch winding, the incoming line end, the welding end of the second layer at slot 02, the welding end of the third layer at slot 11, the welding end of the fourth layer at slot 02, the welding end of the fifth layer at slot 11, the welding end of the sixth layer at slot 02, the welding end of the sixth layer at slot 11, the welding end of the fifth layer at slot 20, the welding end of the fourth layer at slot 11, the welding end of the third layer at slot 20, the welding end of the second layer at slot 11, the welding end of the first layer at slot 20, the welding end of the first layer at slot 30, the welding end of the second layer at slot 21, the welding end of the third layer at slot 30, the welding end of the fourth layer at slot 21, the welding end of the fifth layer at slot 30, the welding end of the sixth layer at slot 21, the welding end of the sixth layer at slot 28, the welding end of the fifth layer at slot 37, the welding end of the fourth layer at slot 28, the welding end of the third layer at slot 37, the welding end of the second layer at slot 28, the welding end of the first layer at slot 37, the welding end of the first layer at slot 47, the welding end of the second layer at slot 38, the welding end of the third layer at slot 47, the welding end of the fourth layer at slot 38, the welding end of the fifth layer at slot 47, the welding end of the sixth layer at slot 38, the welding end of the sixth layer at slot 48, the welding end of the fifth layer at slot 03, the welding end of the fourth layer at slot 48, the welding end of the third layer at slot 03, the welding end of the second layer at slot 48, the welding end of the first layer at slot 03, the welding end of the first layer at slot 10, the welding end of the second layer at slot 01, the welding end of the third layer at slot 10, the welding end of the fourth layer at slot 01, the welding end of the fifth layer at slot 10, the welding end of the sixth layer at slot 01, the welding end of the sixth layer at slot 46, the welding end of the fifth layer at slot 01, the welding end of the fourth layer at slot 46, the welding end of the third layer at slot 01, the welding end of the second layer at slot 46, the welding end of the first layer at slot 01, the welding end of the first layer at slot 12, the welding end of the second layer at slot 03, the welding end of the third layer at slot 12, the welding end of the fourth layer at slot 03, the welding end of the fifth layer at slot 12, the welding end of the sixth layer at slot 03, and the outgoing line end are connected in sequence; thus forming the structure of the second branch winding.

[0084] Embodiment 2

[0085] As Figure 3 and 4 shown, compared with Embodiment 1, the difference in this embodiment is that: in any branch group, the positions of the slots occupied by the first layer, the second layer, and the third layer are all shifted one slot to the left (in the direction of slot 54 - slot 01), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0086] Embodiment 3

[0087] As Figure 5 and 6 shown, compared with Embodiment 1, the difference in this embodiment is that: in any phase winding, the positions of the slots occupied by the first layer, the second layer, and the third layer are all shifted one slot to the right (in the direction of slot 01 - slot 54), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0088] Embodiment 4

[0089] AsFigure 7 and 8 As shown in 8 , compared with the first embodiment, the difference in this embodiment is that in any phase winding, the positions of the slots occupied by the first layer, the third layer, and the fifth layer are all shifted one slot to the left (in the direction of slot 54 - slot 01), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0090] Embodiment Five

[0091] As Figure 9 and 10 shown, compared with the first embodiment, the difference in this embodiment is that in any phase winding, the positions of the slots occupied by the first layer, the third layer, and the fifth layer are all shifted one slot to the right (in the direction of slot 01 - slot 54), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0092] Embodiment Six

[0093] As Figure 11 and 12 shown, compared with the first embodiment, the difference in this embodiment is that in any phase winding, the positions of the slots occupied by the first layer and the second layer are both shifted two slots to the left (in the direction of slot 54 - slot 01), and the positions of the slots occupied by the third layer and the fourth layer are both shifted one slot to the left (in the direction of slot 54 - slot 01), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0094] Embodiment Seven

[0095] As Figure 13 and 14 shown, compared with the first embodiment, the difference in this embodiment is that in any phase winding, the positions of the slots occupied by the first layer and the second layer are both shifted two slots to the right (in the direction of slot 01 - slot 54), and the positions of the slots occupied by the third layer and the fourth layer are both shifted one slot to the right (in the direction of slot 01 - slot 54), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0096] Embodiment Eight

[0097] As Figure 15 and 16As shown in the figure, compared with the first embodiment, the difference in this embodiment is that in any phase winding, the positions of the slots occupied by the first layer are all translated three slots to the left (in the direction of slot 54 - slot 01), the positions of the slots occupied by the second and third layers are all translated two slots to the left (in the direction of slot 54 - slot 01), the positions of the slots occupied by the fourth and fifth layers are all translated one slot to the left (in the direction of slot 54 - slot 01), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0098] Embodiment Nine

[0099] As Figure 17 and 18 shown in the figure, compared with the first embodiment, the difference in this embodiment is that in any phase winding, the positions of the slots occupied by the first layer are all translated three slots to the right (in the direction of slot 01 - slot 54), the positions of the slots occupied by the second and third layers are all translated two slots to the right (in the direction of slot 01 - slot 54), the positions of the slots occupied by the fourth and fifth layers are all translated one slot to the right (in the direction of slot 01 - slot 54), and the rest are the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0100] Embodiment Ten

[0101] As Figure 19 and 20 shown in the figure, compared with the first embodiment, the difference in this embodiment is that the radial number of layers of the stator core is 8 layers. The arrangement methods of the conductors and coil units in the sixth and seventh layers in this embodiment are the same as those of the conductors and coil units in the fourth and fifth layers in the first embodiment. The arrangement methods of the conductors and coil units in the eighth layer in this embodiment are the same as those of the conductors and coil units in the sixth layer in the first embodiment. The arrangement methods of the conductors and coil units in the remaining layers are all the same. The corresponding conductors in any branch winding are connected, and the connection method remains unchanged, which will not be elaborated here.

[0102] Embodiment Eleven

[0103] As Figure 21 and 22 shown in the figure, the radial number of layers of the stator core is 6 layers. In the first branch winding of the stator winding, it includes nine winding units 1 connected in sequence. Among the nine winding units 1, the first four winding units 1 are connected in sequence along the circumferential direction of the stator core from left to right, and the last five winding units 1 are connected in sequence along the circumferential direction of the stator core from right to left.

[0104] Specifically, in the first winding unit 1, it includes the eighth conductor 11 in the 19th slot and 30th slot located in the first layer, which are connected in sequence, the sixth conductor 301 in the 21st slot of the second layer and 30th slot of the third layer, the sixth conductor 301 in the 21st slot of the fourth layer and 30th slot of the fifth layer, and the ninth conductor 21 in the 21st slot and 30th slot located in the sixth layer; in the second winding unit 1, it includes the sixth conductor 301 in the 30th slot of the fourth layer and 39th slot of the fifth layer, which are connected in sequence, and the sixth conductor 301 in the 30th slot of the second layer and 39th slot of the third layer; in the third winding unit 1, it includes the eighth conductor 11 in the 39th slot and 48th slot located in the first layer, which are connected in sequence, the sixth conductor 301 in the 39th slot of the second layer and 48th slot of the third layer, the sixth conductor 301 in the 39th slot of the fourth layer and 48th slot of the fifth layer, and the ninth conductor 21 in the 39th slot and 47th slot located in the sixth layer; in the fourth winding unit 1, it includes the tenth conductor 31 in the 47th slot of the fourth layer and 02nd slot of the fifth layer, which are connected in sequence, the tenth conductor 31 in the 47th slot of the second layer and 02nd slot of the third layer, and the eighth conductor 11 in the 46th slot of the first layer and 02nd slot; in the fifth winding unit 1, it includes the fifth conductor 300 in the 37th slot of the second layer and 46th slot of the third layer, which are connected in sequence, and the fifth conductor 300 in the 37th slot of the fourth layer and 46th slot of the fifth layer; in the sixth winding unit 1, it includes the ninth conductor 21 in the 37th slot and 28th slot located in the sixth layer, which are connected in sequence, the fifth conductor 300 in the 28th slot of the fourth layer and 37th slot of the fifth layer, the fifth conductor 300 in the 28th slot of the second layer and 37th slot of the third layer, and the eighth conductor 11 in the 28th slot of the first layer and 37th slot; in the seventh winding unit 1, it includes the fifth conductor 300 in the 19th slot of the second layer and 28th slot of the third layer, which are connected in sequence, and the fifth conductor 300 in the 19th slot of the fourth layer and 28th slot of the fifth layer; in the eighth winding unit 1, it includes the ninth conductor 21 in the 11th slot and 19th slot located in the sixth layer, which are connected in sequence, the tenth conductor 31 in the 11th slot of the fourth layer and 20th slot of the fifth layer, the tenth conductor 31 in the 11th slot of the second layer and 20th slot of the third layer, and the eighth conductor 11 in the 11th slot of the first layer and 20th slot; in the ninth winding unit 1, it includes the tenth conductor 31 in the 02nd slot of the second layer, which are connected in sequence, the 11th slot of the third layer, and the tenth conductor 31 in the 02nd slot of the fourth layer and 11th slot of the fifth layer.

[0105] In this branch winding, the incoming line end, the welding end of the first layer at slot 19, the welding end of the first layer at slot 30, the welding end of the second layer at slot 21, the welding end of the third layer at slot 30, the welding end of the fourth layer at slot 21, the welding end of the fifth layer at slot 30, the welding end of the sixth layer at slot 21, the welding end of the sixth layer at slot 30, the welding end of the fifth layer at slot 39, the welding end of the fourth layer at slot 30, the welding end of the third layer at slot 39, the welding end of the second layer at slot 30, the welding end of the first layer at slot 39, the welding end of the first layer at slot 48, the welding end of the second layer at slot 39, the welding end of the third layer at slot 48, the welding end of the fourth layer at slot 39, the welding end of the fifth layer at slot 48, the welding end of the sixth layer at slot 39, the welding end of the sixth layer at slot 47, the welding end of the fifth layer at slot 02, the welding end of the fourth layer at slot 47, the welding end of the third layer at slot 02, the welding end of the second layer at slot 47, the welding end of the first layer at slot 02, the welding end of the first layer at slot 46, the welding end of the second layer at slot 37, the welding end of the third layer at slot 46, the welding end of the fourth layer at slot 37, the welding end of the fifth layer at slot 46, the welding end of the sixth layer at slot 37, the welding end of the sixth layer at slot 28, the welding end of the fifth layer at slot 37, the welding end of the fourth layer at slot 28, the welding end of the third layer at slot 37, the welding end of the second layer at slot 28, the welding end of the first layer at slot 37, the welding end of the first layer at slot 28, the welding end of the second layer at slot 19, the welding end of the third layer at slot 28, the welding end of the fourth layer at slot 19, the welding end of the fifth layer at slot 28, the welding end of the sixth layer at slot 19, the welding end of the sixth layer at slot 11, the welding end of the fifth layer at slot 20, the welding end of the fourth layer at slot 11, the welding end of the third layer at slot 20, the welding end of the second layer at slot 11, the welding end of the first layer at slot 20, the welding end of the first layer at slot 11, the welding end of the second layer at slot 02, the welding end of the third layer at slot 11, the welding end of the fourth layer at slot 02, the welding end of the fifth layer at slot 11, and the outgoing line end are connected in sequence; thus forming the structure of the first branch winding.

[0106] In the second branch winding of the stator winding, it includes nine winding units 1 connected in sequence. Among the nine winding units 1, the first seven winding units 1 are connected in sequence along the circumferential direction of the stator core from right to left, and the last two winding units 1 are connected along the circumferential direction of the stator core from left to right.

[0107] Specifically, in the first winding unit 1, it includes the fourth conductor 201 located in the 02 slot and 48 slot of the sixth layer, which are connected in sequence, the fifth conductor 300 located in the 48 slot of the fourth layer and the 03 slot of the fifth layer, the fifth conductor 300 located in the 48 slot of the second layer and the 03 slot of the third layer, and the eighth conductor 11 located in the 03 slot and 47 slot of the first layer; in the second winding unit 1, it includes the tenth conductor 31 located in the 38 slot of the second layer and the 47 slot of the third layer, which are connected in sequence, and the tenth conductor 31 located in the 38 slot of the fourth layer and the 47 slot of the fifth layer; in the third winding unit 1, it includes the eighth conductor 11 located in the 29 slot and 38 slot of the sixth layer, which are connected in sequence, the tenth conductor 31 located in the 29 slot of the fourth layer and the 38 slot of the fifth layer, the tenth conductor 31 located in the 29 slot of the second layer and the 38 slot of the third layer, and the ninth conductor 21 located in the 29 slot and 38 slot of the first layer; in the fourth winding unit 1, it includes the tenth conductor 31 located in the 20 slot of the second layer and the 29 slot of the third layer, which are connected in sequence, and the tenth conductor 31 located in the 20 slot of the fourth layer and the 29 slot of the fifth layer; in the fifth winding unit 1, it includes the ninth conductor 21 located in the 12 slot and 20 slot of the sixth layer, which are connected in sequence, the sixth conductor 301 located in the 12 slot of the fourth layer and the 21 slot of the fifth layer, the sixth conductor 301 located in the 12 slot of the second layer and the 21 slot of the third layer, and the eighth conductor 11 located in the 12 slot and 21 slot of the first layer; in the sixth winding unit 1, it includes the sixth conductor 301 located in the 03 slot of the second layer and the 12 slot of the third layer, which are connected in sequence, and the sixth conductor 301 located in the 03 slot of the fourth layer and the 12 slot of the fifth layer; in the seventh winding unit 1, it includes the third conductor 200 located in the 03 slot and 46 slot of the sixth layer, which are connected in sequence, the fifth conductor 300 located in the 46 slot of the fourth layer and the 01 slot of the fifth layer, and the fifth conductor 300 located in the 46 slot of the second layer and the 01 slot of the third layer; in the eighth winding unit 1, it includes the eighth conductor 11 located in the 01 slot and 10 slot of the first layer, which are connected in sequence, the fifth conductor 300 located in the 01 slot of the second layer and the 10 slot of the third layer, the fifth conductor 300 located in the 01 slot of the fourth layer and the 10 slot of the fifth layer, and the ninth conductor 21 located in the 01 slot and 10 slot of the sixth layer; in the ninth winding unit 1, the fifth conductor 300 is located in the 10 slot of the fourth layer and the 19 slot of the fifth layer, and the fifth conductor 300 is located in the 10 slot of the second layer and the 19 slot of the third layer.

[0108] In this branch winding, the incoming line end, the welding end of slot 02 in the sixth layer, the welding end of slot 48 in the sixth layer, the welding end of slot 03 in the fifth layer, the welding end of slot 48 in the fourth layer, the welding end of slot 03 in the third layer, the welding end of slot 48 in the second layer, the welding end of slot 03 in the first layer, the welding end of slot 47 in the first layer, the welding end of slot 38 in the second layer, the welding end of slot 47 in the third layer, the welding end of slot 38 in the fourth layer, the welding end of slot 47 in the fifth layer, the welding end of slot 38 in the sixth layer, the welding end of slot 29 in the sixth layer, the welding end of slot 38 in the fifth layer, the welding end of slot 29 in the fourth layer, the welding end of slot 38 in the third layer, the welding end of slot 29 in the second layer, the welding end of slot 38 in the first layer, the welding end of slot 29 in the first layer, the welding end of slot 20 in the second layer, the welding end of slot 29 in the third layer, the welding end of slot 20 in the fourth layer, the welding end of slot 29 in the fifth layer, the welding end of slot 20 in the sixth layer, the welding end of slot 12 in the sixth layer, the welding end of slot 21 in the fifth layer, the welding end of slot 12 in the fourth layer, the welding end of slot 21 in the third layer, the welding end of slot 12 in the second layer, the welding end of slot 21 in the first layer, the welding end of slot 12 in the first layer, the welding end of slot 03 in the second layer, the welding end of slot 12 in the third layer, the welding end of slot 03 in the fourth layer, the welding end of slot 12 in the fifth layer, the welding end of slot 03 in the sixth layer, the welding end of slot 46 in the sixth layer, the welding end of slot 01 in the fifth layer, the welding end of slot 46 in the fourth layer, the welding end of slot 01 in the third layer, the welding end of slot 46 in the second layer, the welding end of slot 01 in the first layer, the welding end of slot 10 in the first layer, the welding end of slot 01 in the second layer, the welding end of slot 10 in the third layer, the welding end of slot 01 in the fourth layer, the welding end of slot 10 in the fifth layer, the welding end of slot 01 in the sixth layer, the welding end of slot 10 in the sixth layer, the welding end of slot 19 in the fifth layer, the welding end of slot 10 in the fourth layer, the welding end of slot 19 in the third layer, the welding end of slot 10 in the second layer, the welding end of slot 10 in the second layer, the outgoing line end are connected in sequence; thus forming the structure of the second branch winding.

[0109] Due to the adoption of the above technical solution, each phase winding of the stator winding has at least two branch windings, each branch winding has a plurality of sequentially connected winding units, the plurality of winding units are arranged in at least two groups, having at least one turning point, the connection modes of the plurality of winding units in adjacent two groups are opposite, the plurality of winding units in one group are sequentially connected from left to right along the circumferential direction of the stator core, the plurality of winding units in the other group are sequentially connected from right to left along the circumferential direction of the stator core, in each winding unit, there are a plurality of conductors sequentially connected along the radial direction of the stator core, the connection directions of the plurality of conductors in adjacent two winding units are opposite, the plurality of conductors in one winding unit are connected from the radial inner layer to the radial outer layer direction, the plurality of conductors in the other winding unit are connected from the radial outer layer to the radial inner layer direction, the incoming line end and the outgoing line end of each branch are located within the same magnetic pole and at the two radial ends of the magnetic pole, so that each branch winding is a complete overlapping winding structure, making the potential difference between the radially adjacent welding points of the stator winding small and having a lower requirement for insulation.

[0110] The above has described the embodiments of the present utility model in detail, but the above content is only the preferred embodiment of the present utility model and cannot be considered as defining the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of application of the present utility model shall still fall within the scope covered by the patent of the present utility model.

Claims

1. A stator winding, characterized in that: Any phase winding includes at least two branches. The inlet end and the outlet end of each branch are located on the radial two sides of the stator core. Each branch includes a plurality of sequentially connected winding units. The winding unit includes a plurality of conductors sequentially connected in the radial direction of the stator core from the inner layer to the outer layer or from the outer layer to the inner layer. The connection directions of the plurality of conductors in two adjacent winding units are opposite; The plurality of winding units are arranged into at least two groups. The number of winding units in each group is at least one. The plurality of winding units in each group are sequentially connected along the circumferential direction of the stator core from left to right or from right to left. The connection directions of the winding units in two adjacent groups are opposite.

2. The stator winding according to claim 1, wherein: Along the radial direction of the stator core, any one of the winding units includes: The first conductor or the second conductor or the eighth conductor arranged at the innermost layer in the radial direction; The third conductor or the fourth conductor or the ninth conductor arranged at the outermost layer in the radial direction; At least two of the fifth conductor or the sixth conductor or the seventh conductor or the tenth conductor arranged between the innermost layer and the outermost layer in the radial direction. The fifth conductor, the sixth conductor, the seventh conductor or the tenth conductor are arranged on two adjacent layers in the radial direction of the stator core.

3. The stator winding according to claim 1, characterized in that: Along the radial direction of the stator core, any one of the winding units includes: At least two of the fifth conductor or the sixth conductor or the seventh conductor or the tenth conductor arranged between the innermost layer and the outermost layer in the radial direction. The fifth conductor, the sixth conductor, the seventh conductor or the tenth conductor are arranged on two adjacent layers in the radial direction of the stator core.

4. The stator winding according to claim 1, characterized in that: Along the radial direction of the stator core, any one of the winding units includes: The first conductor or the second conductor or the eighth conductor arranged at the innermost layer in the radial direction; or, the third conductor or the fourth conductor or the ninth conductor arranged at the outermost layer in the radial direction; At least two of the fifth conductor or the sixth conductor or the seventh conductor or the tenth conductor arranged between the innermost layer and the outermost layer in the radial direction. The fifth conductor, the sixth conductor, the seventh conductor or the tenth conductor are arranged on two adjacent layers in the radial direction of the stator core.

5. The stator winding according to any one of claims 1-4, characterized in that: Each winding unit is arranged within one magnetic pole. The inlet end and the outlet end of each branch are located on the radial two sides of the same magnetic pole of the stator core.

6. The stator winding according to any one of claims 1-4, characterized in that: When each branch is wound in a stacked manner, the plurality of winding units in each group are arranged within at least several magnetic poles, or, the plurality of winding units in each group cover all the magnetic poles and at least one magnetic pole is provided with at least two of the winding units.

7. The stator winding according to claim 2 or 4, characterized in that: Along the circumferential direction of the stator core, both sets of corresponding slots of the first conductor and the second conductor are arranged within two slots separated by at least one slot.

8. The stator winding according to claim 7, wherein: Along the circumferential direction of the stator core, both sets of corresponding slots of the third conductor and the fourth conductor are arranged within two adjacent slots.

9. The stator winding according to claim 8, characterized in that: Along the circumferential direction of the stator core, both sets of corresponding slots of the fifth conductor, the sixth conductor and the seventh conductor are arranged within three adjacent slots.

10. The stator winding according to claim 1, characterized in that: The number of radial layers of the stator core is an even number greater than or equal to 4.

11. A stator, characterized in that: It includes the stator winding according to any one of claims 1-10.

12. A motor, characterized in that: It includes the stator according to claim 11.

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