Stator winding, stator and motor

Abstract

The utility model provides a stator winding, a stator and a motor, the stator winding comprises a multi-phase winding, in any phase winding, a plurality of first conductor coils are sequentially arranged in two adjacent magnetic poles along the radial direction of a stator iron core, and a plurality of second conductor coils are sequentially arranged in two adjacent magnetic poles along the radial direction of the stator iron core. The twisting direction of the turning part of one part of the conductor in the first conductor coil is different from that of the turning part of the other part of the conductor; in other magnetic poles, a plurality of second conductor coils are sequentially arranged in the radial direction of the stator core, and the twisting directions of turning parts of a plurality of conductors in the second conductor coils are the same; and the leading-out wire end of each phase winding is arranged at the wire insertion end of the phase winding, so that the short-distance structure arrangement of the conductors in the groove is more uniform, the problems of NVH and noise are solved, and the noise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, especially a kind of stator winding, stator and motor. BACKGROUND

[0002] The current flat wire motor q=3, 2 branch parallel stator, slot conductor is mostly whole distance structure, or structure is short distance of cross structure, or structure is short distance of separation structure, in solving NVH and noise, effect is not very obvious. SUMMARY

[0003] In view of above problem, the utility model provides a kind of stator winding, stator and motor to solve the above or other former problems existing in prior art.

[0004] To solve the above technical problem, the technical scheme adopted by the utility model is: a kind of stator winding, including multiphase winding, in any phase winding, in two adjacent magnetic poles, multiple first conductor coils are sequentially arranged along the radial direction of stator core, the twist direction of the turning portion of one part of conductor in first conductor coil is different from the twist direction of the turning portion of another part of conductor;

[0005] In other magnetic poles, multiple second conductor coils are sequentially arranged along the radial direction of stator core, and the twist direction of the turning portion of multiple conductors in second conductor coil is the same;

[0006] The lead-out line end of each phase winding is provided at the plug-in line end of the phase winding.

[0007] Further, the twist direction of the turning portion of at least one conductor in first conductor coil is the same as the twist direction of the turning portion of at least one conductor in second conductor coil.

[0008] Further, the pitch of the conductor with the same twist direction of the turning portion in first conductor coil and second conductor coil is the same.

[0009] Further, at least one connecting structure is further provided in the magnetic pole where multiple first conductor coils are located, and the connecting structure is provided on one side of multiple first conductor coils along the radial direction of stator core, and the connecting structure is conductor coil structure or busbar.

[0010] Further, the twist direction of the turning portion of at least one conductor in connecting structure is the same as the twist direction of the turning portion of at least one conductor in second conductor coil, and the twist direction of the turning portion of at least one conductor in connecting structure is the same as the twist direction of the turning portion of at least one conductor in first conductor coil.

[0011] Further, the pitch of the conductor with the same twist direction of the turning portion in connecting structure, first conductor coil and second conductor coil is the same.

[0012] Further, the plurality of conductors in the first conductor coil are arranged into at least two portions, in the adjacent two portions along the radial direction of the stator core, two groups of slot interiors of one portion of the conductors are respectively arranged in the radial Nth layer and the radial (N+1)th layer of the stator core, and two groups of slot interiors of another portion of the conductors are respectively arranged in the radial (N+1)th layer and the radial (N+2)th layer of the stator core, wherein N is an odd number.

[0013] Further, in the adjacent two portions along the radial direction of the stator core in the first conductor coil, one group of slot interiors of one portion of the conductors and one group of slot interiors of another portion of the conductors are arranged in adjacent slots along the circumferential direction of the stator core, and the other group of slot interiors of one portion of the conductors and the other group of slot interiors of another portion of the conductors are arranged at least one slot apart along the circumferential direction of the stator core.

[0014] Further, the number of conductors in the first conductor coil, whose two groups of slot interiors are respectively arranged in the radial Nth layer and the radial (N+1)th layer of the stator core, is at least one, and the number of conductors in the first conductor coil, whose two groups of slot interiors are respectively arranged in the radial (N+1)th layer and the radial (N+2)th layer of the stator core, is at least two, and the plurality of conductors in each portion are arranged in a surrounding manner or an adjacent manner along the circumferential direction of the stator core.

[0015] Further, two groups of slot interiors of the plurality of conductors of the second conductor coil are arranged in the adjacent two layers along the radial direction of the stator core.

[0016] Further, the connecting structure comprises one conductor arranged in the adjacent two layers along the radial direction of the stator core; or,

[0017] The connecting structure comprises a plurality of conductors, and the plurality of conductors are arranged into at least two portions, in the adjacent two portions along the radial direction of the stator core, two groups of slot interiors of one portion of the conductors are arranged in the same layer along the radial direction of the stator core, two groups of slot interiors of another portion of the conductors are arranged in the adjacent two layers along the radial direction of the stator core, and one group of slot interiors of one portion of the conductors and one group of slot interiors of another portion of the conductors are arranged in the same layer along the radial direction of the stator core.

[0018] Further, in the adjacent two portions along the radial direction of the stator core in the connecting structure, one group of slot interiors of one portion of the conductors and one group of slot interiors of another portion of the conductors are arranged in adjacent slots along the circumferential direction of the stator core, and the other group of slot interiors of one portion of the conductors and the other group of slot interiors of another portion of the conductors are arranged in the same slot along the circumferential direction of the stator core.

[0019] Further, the number of conductors in the two groups of slots of the part of the connection structure arranged in the same layer of the stator core in the radial direction is at least two, and the number of conductors in the two groups of slots of the other part of the connection structure arranged in the two adjacent layers of the stator core in the radial direction is at least one, and the plurality of conductors in each part are arranged in a surrounding manner or an adjacent manner along the circumferential direction of the stator core.

[0020] Further, the lead-out end and the connection structure are located on the two sides of the stator core in the radial direction, and the lead-out end is located in the magnetic pole provided with the first conductor coil.

[0021] Further, the number of layers of the stator core in the radial direction is an even number greater than or equal to 4; the welding end of any phase winding includes a plurality of welding conductor coils, the pitches of the plurality of welding conductors in the welding conductor coils are the same, and the plurality of welding conductors are arranged in adjacent slots along the circumferential direction of the stator core.

[0022] A stator comprising the stator winding as described above.

[0023] An electric machine comprising the stator as described above.

[0024] Due to the above technical solutions, the stator winding is composed of a plurality of types of conductor coils, the lead-out end of each phase winding is arranged on the plug-in end side of the stator winding, in the same magnetic pole, the plurality of conductor coils arranged in the radial direction of the stator core are arranged in a stepped manner, and the plurality of conductor coils are arranged in an adjacent manner along the same circumferential direction of the stator core, so that the short-pitch conductors in the slots of the stator core are uniformly arranged.

[0025] In the plug-in end of each phase winding, a plurality of first conductor coils and at least one connecting structure are sequentially arranged in the radial direction of the stator core in any two adjacent magnetic poles, the connecting structures in the two magnetic poles are not the same in structure, in the plurality of conductors in the first conductor coil, the twist wire direction of the turn portion of a part of the conductors is not the same as the twist wire direction of the turn portion of another part of the conductors, and the first conductor coil is arranged in three adjacent layers in the radial direction of the stator core, the two parts of the conductors are arranged in two adjacent layers in the radial direction of the stator core, the inner part of a group of slots of the part of the conductors and the inner part of a group of slots of the other part of the conductors are arranged in the same layer, the inner part of another group of slots of the part of the conductors and the inner part of another group of slots of the other part of the conductors are arranged in two layers that are not adjacent, and the two layers are separated by at least one layer, the connecting structure is arranged in two adjacent layers in the radial direction of the stator core, the part of the conductors is arranged in two adjacent layers in the radial direction of the stator core, the other part of the conductors is arranged in the same layer in the radial direction of the stator core, and the inner part of a corresponding group of slots of the two parts of the conductors is arranged in the same layer, a plurality of second conductor coils are sequentially arranged in the radial direction of the stator core in other magnetic poles, and the plurality of conductors in the second conductor coil are arranged in a surrounding mode, so that the arrangement of the conductor short-distance structure in the slot is relatively more uniform, and the second conductor coil is arranged in a stepped mode, so that the problems of NVH and noise are better solved.

[0026] The pitch and the twist wire direction of at least one conductor in the first conductor coil and at least one conductor in the connecting structure are the same, the lead-in end and the lead-out end of each parallel branch are located in two magnetic poles where the first conductor coil is located, and the lead-in end and the lead-out end of each parallel branch are located on the same side in the radial direction of the stator core, so that the arrangement of the conductor short-distance structure in the slot is relatively more uniform, and the problems of NVH and noise are better solved, and the motor noise is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a planar unfolded structure schematic view of the plug-in end (crown end) of the embodiment one of the utility model;

[0028] Figure 2 is a planar unfolded structure schematic view of the welding end of the embodiment one of the utility model;

[0029] Figure 3 is a planar unfolded structure schematic view of the plug-in end (crown end) of the embodiment two of the utility model;

[0030] Figure 4 is a planar unfolded structure schematic view of the welding end of the embodiment two of the utility model;

[0031] Figure 5 is a planar unfolded structure schematic view of the plug-in end (crown end) of the embodiment three of the utility model;

[0032] Figure 6is a plane expansion structure schematic diagram of the welding end of the embodiment three of the utility model;

[0033] Figure 7 is a plane expansion structure schematic diagram of the plug-in end (crown end) of the embodiment four of the utility model;

[0034] Figure 8 is a plane expansion structure schematic diagram of the welding end of the embodiment four of the utility model.

[0035] In the drawing,

[0036] 10, first conductor coil 20, connecting structure 30, second conductor coil

[0037] 40, welding conductor coil 100, first conductor 101, second conductor

[0038] 102, third conductor 201, fourth conductor 202, fifth conductor

[0039] 301, sixth conductor 302, seventh conductor 400, welding conductor DETAILED DESCRIPTION

[0040] The utility model will be further explained in connection with the drawings and specific embodiments.

[0041] Figure 1 The structure schematic diagram of an embodiment of the utility model is shown, the embodiment relates to a kind of stator winding, stator and motor, in any phase winding of the stator winding, the incoming line end and outgoing line end of any branch winding are located in the plug-in end of the phase winding, multiple first conductor coils are arranged in two adjacent magnetic poles, the twist wire direction of the turning portion of a part of conductor in first conductor coil is different from the twist wire direction of the turning portion of another part of conductor, multiple conductor coils are arranged in the remaining magnetic pole, the twist wire direction of the turning portion of multiple conductors in second conductor coil is same, in the same magnetic pole, multiple conductor coils are arranged in ladder along the radial direction of stator core, so that the short distance conductor arrangement in the slot of stator core is more uniform, better solve the NVH and noise problem of motor, noise reduction.

[0042] A kind of stator winding, such as Figures 1-8As shown, the stator winding includes a plurality of phase windings, each of which is arranged in a corresponding slot of the stator core, each phase winding is sequentially arranged by a plurality of hairpin coils along the circumferential direction and the radial direction of the stator core according to a certain arrangement rule, each phase winding has a wire insertion end (crown end) and a welding end, which are respectively located on the two axial sides of the stator core. At the welding end, the corresponding two welding end portions of the two conductors are welded to realize the connection of the two conductors, and the plurality of conductors in one branch winding of each phase winding are sequentially connected to form a branch winding structure. In some implementable embodiments, the plurality of phase windings is a three-phase winding, each phase winding has the same structure, except that the slots in the stator core are different. The structure of the stator winding will be described below by taking any one phase winding as an example.

[0043] Each phase winding includes a plurality of types of conductor coils arranged along the radial direction and the circumferential direction of the stator core. In the arrangement, according to the position of the slot of the stator core occupied by the phase winding, a plurality of types of conductor coils are arranged along the circumferential direction of the stator core, each type of conductor coil has a plurality of quantities, forming a winding coil unit, and a plurality of winding coil units are sequentially arranged along the radial direction of the stator core, forming a phase winding structure. Each type of conductor coil described below includes at least one conductor, and the number of conductors in each type of conductor coil is selected and arranged according to actual needs.

[0044] In any phase winding, the outgoing line end is arranged at the wire insertion end of the phase winding, that is, the incoming line end and the outgoing line end of each phase winding are arranged at one end of the axial direction of the stator core, and the incoming line end and the outgoing line end of each phase winding are arranged at the wire insertion end of the phase winding.

[0045] In the stator winding, each phase winding includes at least two parallelly connected branch windings U1, U2, each branch winding has an incoming line end and an outgoing line end, and the incoming line end and the outgoing line end of each branch winding are arranged at the wire insertion end of the phase winding.

[0046] Any phase winding includes a plurality of first conductor coils 10 and a plurality of second conductor coils 30, which are arranged along the radial direction and the circumferential direction of the stator core according to a certain arrangement rule to form the structure of a phase winding.

[0047] Specifically, in any phase winding, in the adjacent two magnetic poles, a plurality of first conductor coils 10 are sequentially arranged along the radial direction of the stator core, and the number of the first conductor coils 10 is selected according to actual needs; in other magnetic poles, a plurality of second conductor coils 30 are sequentially arranged along the radial direction of the stator core, and the number of the second conductor coils 30 is selected according to actual needs. Along the same circumferential direction of the stator core, at the plug-in end of any phase winding, the twist direction of the turn portion of a part of the conductors in the first conductor coil 10 is different from the twist direction of the turn portion of another part of the conductors, the first conductor coil 10 includes a plurality of conductors, which are arranged into two parts, each part includes at least one conductor, the twist direction of the turn portion of the plurality of conductors in each part is the same, and the twist direction of the turn portion of the conductors in one part is different from the twist direction of the turn portion of the conductors in another part. Here, the twist direction of the turn portion of the conductors is the inclination direction of the turn portion of the conductors along the circumferential direction of the stator core. Of course, the plurality of conductors in the first conductor coil 10 can also be arranged into three parts or more, in which case, the twist direction of the turn portion of the plurality of conductors in each part is the same, and the twist direction of the turn portion of the conductors in adjacent two parts is different along the radial direction of the stator core.

[0048] In some implementable embodiments, preferably, along the same circumferential direction of the stator core, the plurality of conductors in the first conductor coil 10 are arranged into two parts, the twist direction of the turn portion of a part of the conductors is opposite to the twist direction of the turn portion of another part of the conductors, for example, the turn portion of a part of the conductors in the first conductor coil 10 inclines upward along the circumferential direction of the stator core, and the turn portion of another part of the conductors inclines downward along the circumferential direction of the stator core, where inclining upward is inclining from the radially innermost layer to the radially outermost layer along the radial direction of the stator core, and inclining downward is inclining from the radially outermost layer to the radially innermost layer along the radial direction of the stator core.

[0049] In some implementable embodiments, preferably, the number of a part of the conductors in the first conductor coil 10 is two, and the number of another part of the conductors is one.

[0050] In the first conductor coil 10, in two adjacent parts of the conductor along the radial direction of the stator core, the inner part of a group of slots of one part of the conductor and the inner part of a group of slots of the other part of the conductor are arranged in adjacent slots along the circumferential direction of the stator core, and the inner part of another group of slots of one part of the conductor and the inner part of another group of slots of the other part of the conductor are arranged at least one slot apart along the circumferential direction of the stator core. For example, one part of the first conductor coil 10 includes two conductors, and the other part of the first conductor coil 10 includes one conductor. The corresponding inner parts of the three conductors are arranged in adjacent slots. In the corresponding group of slots, the first inner part and the second inner part are arranged adjacent to each other, the third inner part is arranged one slot apart from the first inner part, and the third inner part is arranged two slots apart from the second inner part.

[0051] Further optimization scheme, at least one connecting structure 20 is arranged in one magnetic pole where the plurality of first conductor coils 10 are arranged. Along the radial direction of the stator core, the connecting structure 20 is arranged on one side of the plurality of first conductor coils 10. The number of connecting structures 20 can be one, or the number of connecting structures 20 can be multiple. The number of connecting structures 20 is selected according to actual needs. That is, the plurality of first conductor coils 10 and the at least one connecting structure 20 are arranged in sequence along the radial direction of the stator core. The connecting structure 20 is arranged on the inner side or the outer side of the radial direction of the stator core. The arrangement mode of the connecting structure 20 is selected and arranged according to actual needs. The connecting structure is a conductor coil structure or a busbar, which realizes the connection of each conductor in any parallel branch and forms a branch winding structure.

[0052] In some embodiments, the number of connecting structures 20 in one magnetic pole where the plurality of first conductor coils 10 are arranged is preferably one.

[0053] When the connection structure 20 is a conductor coil structure (the following description is based on the connection structure 20 being a conductor coil structure), the connection structure 20 in the two magnetic poles is not the same, the number of conductors in the connection structure 20 in one magnetic pole is greater than the number of conductors in the connection structure 20 in the other magnetic pole, and at least one conductor in the connection structure 20 in the two magnetic poles is the same: for example, the number of conductors in the connection structure 20 in one magnetic pole is three, and the number of conductors in the connection structure 20 in the other magnetic pole is one, then one conductor in the connection structure 20 in one magnetic pole is the same as the conductor in the connection structure 20 in the other magnetic pole; or, the number of conductors in the connection structure 20 in one magnetic pole is four, and the number of conductors in the connection structure 20 in the other magnetic pole is two, one conductor in the connection structure 20 in one magnetic pole is the same as one conductor in the connection structure 20 in the other magnetic pole, or two conductors in the connection structure 20 in one magnetic pole are the same as two conductors in the connection structure 20 in the other magnetic pole. Here, the same means that the pitch and arrangement of the same conductors in the two types of connection structure 20 are the same. The arrangement of the two types of connection structure 20 in the two magnetic poles is selected according to actual needs, and no specific requirements are made here. The arrangement of the connection structure 20 with a large number of conductors facilitates the arrangement of multiple parallel branches in each phase winding, and each parallel branch is reversed during connection to concentrate the multiple first conductor coils 10 and multiple connection structures 20 in the two adjacent magnetic poles.

[0054] In the same circumferential direction of the stator core, the connection structure 20 includes multiple conductors, which are arranged in at least two parts, each part including at least one conductor, and the twist directions of the turn portions of the multiple conductors in each part are the same. In the adjacent two parts, the twist direction of the turn portion of the conductor in one part is different from the twist direction of the turn portion of the conductor in the other part.

[0055] In some embodiments, preferably, the multiple conductors in the connection structure 20 are arranged in two parts, the turn portions of the conductors in one part of the connection structure 20 are arranged horizontally along the circumferential direction of the stator core and do not tilt along the radial direction of the stator core, and the turn portions of the conductors in the other part tilt downward along the circumferential direction of the stator core and tilt from the outermost radial layer to the innermost radial layer along the radial direction of the stator core.

[0056] In some embodiments, preferably, the number of conductors in one part of the connection structure 20 is two, and the number of conductors in the other part is one.

[0057] Alternatively, the connection structure 20 comprises one conductor, and the conductor is arranged in two adjacent layers along the radial direction of the stator core, i.e., two slot inner portions of the conductor are arranged in two adjacent layers along the radial direction of the stator core.

[0058] When the connection structure 20 comprises one conductor, the twist direction of the turn portion of the conductor is the same as the twist direction of the turn portion of at least one conductor in the first conductor coil 10; when the number of the conductors in the connection structure 20 is plural, the twist direction of the turn portion of at least one conductor in the first conductor coil 10 is the same as the twist direction of the turn portion of at least one conductor in the connection structure 20, i.e., the twist direction of the turn portion of a part of the conductors in the first conductor coil 10 is the same as the twist direction of the turn portion of a part of the conductors in the connection structure 20, and the twist direction of the turn portion of the other part of the conductors in the first conductor coil 10 can be the same as or different from the twist direction of the turn portion of the other part of the conductors in the connection structure 20, which is selected according to actual requirements, and no specific requirements are made herein.

[0059] In some implementable embodiments, preferably, the twist direction of the turn portion of the other part of the conductors in the first conductor coil 10 is different from the twist direction of the turn portion of the other part of the conductors in the connection structure 20.

[0060] In the connection structure 20, in two adjacent parts of the conductors along the radial direction of the stator core, one group of slot inner portions of one part of the conductors and one group of slot inner portions of the other part of the conductors are arranged in adjacent slots along the circumferential direction of the stator core, and at least one of the other group of slot inner portions of one part of the conductors and the other group of slot inner portions of the other part of the conductors is arranged in the same slot along the circumferential direction of the stator core, e.g., one part of the conductors in the connection structure 20 comprises two conductors, and the other part of the conductors comprises one conductor, and the corresponding one group of corresponding slot inner portions of the three conductors are arranged in adjacent slots, and in the other group of corresponding slot inner portions, the first slot inner portion and the second slot inner portion are arranged in adjacent slots, and the third slot inner portion is arranged in the same slot as the first slot inner portion, and the third slot inner portion is arranged in the same slot as the second slot inner portion.

[0061] In other magnetic poles, a plurality of second conductor coils 30 are arranged in sequence along the radial direction of the stator core, and the twist directions of the turn portions of the plurality of conductors in the second conductor coils 30 are all the same, i.e., in other magnetic poles, a plurality of conductor coils of the same type are arranged, and the plurality of second conductor coils 30 are arranged in sequence along the radial direction of the stator core from the radially innermost layer to the radially outermost layer or from the radially outermost layer to the radially innermost layer, and the tilt directions of the turn portions of the conductors in the second conductor coils 30 along the same circumferential direction of the stator core are the same.

[0062] The twist direction of the turn of at least one conductor in the first conductor coil 10 is the same as the twist direction of the turn of at least one conductor in the second conductor coil 30, and the twist direction of the turn of at least one conductor in the connecting structure 20 is the same as the twist direction of the turn of at least one conductor in the second conductor coil 30, so that in any phase winding, the twist directions of the turns of at least one conductor in the same layer or the same layer group of each magnetic pole are the same, so that the arrangement of the conductors in any phase winding is uniform.

[0063] In some implementable embodiments, preferably, the twist direction of the turn of the conductor in the first conductor coil 10 which has the same twist direction of the turn in the second conductor coil 30 is the same as the twist direction of the turn of the conductor in the connecting structure 20 which has the same twist direction of the turn in the second conductor coil 30, that is, the first conductor coil 10, the connecting structure 20 and the second conductor coil 30 have the conductor with the same twist direction of the turn.

[0064] The pitch of at least one conductor in the first conductor coil 10 is the same as the pitch of at least one conductor in the second conductor coil 30, which is selected according to actual needs and is not specifically required here. In some implementable embodiments, the twist direction of the turn of the conductor in the first conductor coil 10 which has the same pitch as the second conductor coil 30 is the same.

[0065] The pitch of at least one conductor in the connecting structure 20 is the same as the pitch of at least one conductor in the second conductor coil 30, which is selected according to actual needs and is not specifically required here. In some implementable embodiments, the twist direction of the turn of the conductor in the connecting structure 20 which has the same pitch as the second conductor coil 30 is the same.

[0066] In some implementable embodiments, the pitch of the conductor in the first conductor coil 10 which has the same pitch as the second conductor coil 30 is the same as the pitch of the conductor in the connecting structure 20 which has the same pitch as the second conductor coil 30, that is, the first conductor coil 10, the connecting structure 20 and the second conductor coil 30 have the conductor with the same pitch, and the twist direction of the turn of the conductor in the first conductor coil 10, the connecting structure 20 and the second conductor coil 30 which has the same pitch is consistent.

[0067] The plurality of conductors in the first conductor coil 10 is arranged in at least two parts, and in the conductors of the two parts adjacent along the radial direction of the stator core, two groups of slot interiors of one part of the conductors are respectively arranged in the radial Nth layer and the radial N+1th layer of the stator core, and two groups of slot interiors of another part of the conductors are respectively arranged in the radial N+1th layer and the radial N+2th layer of the stator core, wherein N is an odd number, that is, in the first conductor coil 10, the inclination direction of the turning part of one part of the conductors is arranged to intersect the inclination direction of the turning part of another part of the conductors along the radial direction of the stator core, one group of slot interiors of one part of the conductors is arranged in the same layer as one group of slot interiors of another part of the conductors, and the other group of slot interiors of one part of the conductors is not arranged in the adjacent layer as the other group of slot interiors of another part of the conductors, and the two layers are separated by at least one layer, and in the first conductor coil 10, the number of conductors in each part is selected and arranged according to actual needs, and here no specific requirements are made, and the number of conductors in each part can be the same or different, and is selected and arranged according to actual needs, and here no specific requirements are made.

[0068] In the first conductor coil 10, the number of conductors of one part of the conductors arranged in the radial Nth layer and the radial N+1th layer of the stator core is at least one, and when the number of conductors is multiple, the multiple conductors can be arranged in a surrounding manner along the circumferential direction of the stator core, or can be arranged adjacent along the circumferential direction of the stator core, and the number of conductors of another part of the conductors arranged in the radial N+1th layer and the radial N+2th layer of the stator core is at least two, and the multiple conductors are arranged in a surrounding manner or adjacent along the circumferential direction of the stator core. Here, the multiple conductors arranged in a surrounding manner are: the first conductor surrounds the outside of the second conductor, the second conductor surrounds the outside of the third conductor, and the multiple conductors are arranged in a surrounding manner along the radial direction of the stator core, and two groups of slot interiors of the multiple conductors are arranged in adjacent slots along the circumferential direction of the stator core, or one group of slot interiors of the multiple conductors is arranged in adjacent slots along the circumferential direction of the stator core, and in the other group of slot interiors of the multiple conductors, at least one slot interior is separated from the adjacent slot interior by at least one slot, or two groups of slot interiors of the multiple conductors are arranged in non-adjacent slots along the circumferential direction of the stator core, and in any one group of slot interiors, two adjacent slot interiors are separated by at least one slot; the multiple conductors arranged adjacent are: the multiple conductors are arranged in adjacent slots along the circumferential direction of the stator core.

[0069] The plurality of conductors in the connection structure 20 is arranged in at least two parts, in the adjacent two parts of the conductors along the radial direction of the stator core, one part of the two groups of slot interiors of the conductors is arranged in the same radial layer of the stator core, and the other part of the two groups of slot interiors of the conductors is arranged in the adjacent two radial layers of the stator core, and one group of slot interiors of one part of the conductors and one group of slot interiors of the other part of the conductors are arranged in the same layer of the stator core, that is, the turning parts of the conductors in each part in the connection structure 20 are arranged in intersection along the radial direction of the stator core.

[0070] In the connection structure 20, the number of conductors of one part of the two groups of slot interiors of the conductors arranged in the same radial layer of the stator core is at least two, and the plurality of conductors is arranged in surrounding or adjacent along the circumferential direction of the stator core, and the number of conductors of the other part of the two groups of slot interiors of the conductors arranged in the adjacent two radial layers of the stator core is at least one, when the number of conductors is multiple, the plurality of conductors is arranged in surrounding or adjacent along the circumferential direction of the stator core, the number of conductors in each part and the arrangement mode are selected according to actual requirements, which is not specifically required here.

[0071] The two groups of slot interiors of the second conductor coil 30 are arranged in the adjacent two radial layers of the stator core, and the plurality of conductors in the second conductor coil 30 is arranged in surrounding, and the two groups of slot interiors of the plurality of conductors are arranged in the adjacent slots along the circumferential direction of the stator core.

[0072] Further optimization scheme, a plurality of conductor coils arranged in sequence along the radial direction of the stator core in the same magnetic pole are arranged adjacent along the same circumferential direction of the stator core, that is, in each phase winding, in each magnetic pole, a plurality of conductor coils are arranged in sequence along the radial innermost layer to the outermost layer direction or the outermost layer to the innermost layer direction of the stator core, and these conductor coils are arranged in the same circumferential direction (01 slot to 54 slot direction or 54 slot to 01 slot direction) of the stator core, and the adjacent two conductor coils are arranged in the adjacent slots, that is, the first conductor coil and the second conductor coil are arranged in the adjacent slots, the first conductor coil and the second conductor coil are staggered in the circumferential direction, the second conductor coil and the third conductor coil are arranged in the adjacent slots, the second conductor coil and the third conductor coil are staggered in the circumferential direction, and so on, until the last two conductor coils, the last two conductor coils are arranged in the adjacent slots, and the last two conductor coils are staggered in the circumferential direction, that is, along the radial direction of the stator core, any two adjacent conductor coils are arranged in the adjacent slots along the circumferential direction of the stator core, and are not arranged in the same slot, and the plurality of conductor coils are arranged in steps in the radial direction of the stator core, so that the conductor arrangement in the slots of the stator core is uniform.

[0073] In any phase winding, the outgoing line end of the phase winding and the connecting structure 20 are located on the two sides of the radial direction of the stator core, that is, the outgoing line end and the connecting structure 20 are not located on the same layer of the radial direction of the stator core. The outgoing line end can be located on the innermost layer of the radial direction of the stator core, and then the connecting structure 20 is located on the outermost layer of the radial direction of the stator core or on the outermost layer and (the outermost layer-1) layer of the radial direction of the stator core. Or, the outgoing line end can be located on the outermost layer of the radial direction of the stator core, and then the connecting structure 20 is located on the innermost layer of the radial direction of the stator core or on the innermost layer and (the innermost layer+1) layer of the radial direction of the stator core.

[0074] In any phase winding, the outgoing line end of the phase winding is located in the magnetic pole provided with the first conductor coil 10, that is, the outgoing line end and the outgoing line end of the phase winding are located in two adjacent magnetic poles, and the first conductor coil 10 or the first conductor coil 10 and the connecting structure 20 are provided in the two magnetic poles. The structures of the connecting structures 20 in the two magnetic poles are different, and in other magnetic poles, a plurality of second conductor coils 30 are provided, and the first conductor coil 10 and the connecting structure 20 are not provided.

[0075] The radial layer number of the stator core described above is an even number greater than or equal to 4, and the radial layer number of the stator core is selected according to actual needs, which is not specifically required here.

[0076] In the welding end of any phase winding, a plurality of welding conductor coils 40 are sequentially arranged in any magnetic pole along the radial direction of the stator core. The plurality of welding conductor coils 40 sequentially arranged along the radial direction of the stator core in the same magnetic pole are arranged adjacent to each other along the same circumferential direction of the stator core, that is, the plurality of welding conductor coils 40 in any magnetic pole are arranged in steps along the radial direction of the stator core. The welding conductor coil 40 includes a plurality of welding conductors 400, and the plurality of welding conductors 400 are arranged adjacent to each other along the circumferential direction of the stator core, that is, along the circumferential direction of the stator core, the plurality of welding conductors 400 are arranged in adjacent slots.

[0077] Along the radial direction of the stator core, the two groups of slots of the welding conductor coil 40 are arranged in the radially adjacent two layers of the stator core, the pitches of the plurality of welding conductors 400 in the welding conductor coil 40 are the same, and the welding conductor 400 is welded by one welding end of one conductor and one welding end of another conductor.

[0078] In some implementable embodiments, preferably, the pitch of the welding conductor 400 is 9.

[0079] A stator includes a stator winding as described above.

[0080] A motor includes a stator as described above.

[0081] The following will be described in detail with some embodiments.

[0082] Embodiment one

[0083] As shown in Figure 1 and 2 A stator winding is mounted on a stator core, the stator core has a plurality of slots, and the plurality of slots are formed on the radial inner surface of the stator core and are spaced apart along the circumferential direction of the stator core at a predetermined slot pitch. In this embodiment, the stator winding is a three-phase winding, the hairpin coils in each phase stator winding are connected in parallel along two branches in the circumferential direction of the stator core, the two parallel branches are U1 and U2, the number of slots of the stator core is 54, the stator has 6 magnetic poles, and the radial layer number of the stator core is 6 layers.

[0084] Each phase winding is composed of 12 second conductor coils 30, 4 first conductor coils 10 and 2 connection structures 20. The 12 second conductor coils 30 are arranged in four adjacent magnetic poles, sequentially arranged along the circumferential direction of the stator core, and sequentially arranged along the radial direction of the stator core. The 4 first conductor coils 10 are arranged in the remaining two adjacent magnetic poles, sequentially arranged along the circumferential direction of the stator core, and sequentially arranged along the radial direction of the stator core. The two connection structures 20 are arranged in the two adjacent magnetic poles where the first conductor coils 10 are located, and the two connection structures 20 are located at the radially outermost layer and (radially outermost layer-1) layer of the magnetic poles where they are located, forming a phase winding structure.

[0085] The first conductor coil 10 is arranged in three adjacent layers along the radial direction of the stator core. Two first conductor coils 10 are sequentially arranged along the circumferential direction of the stator core in the first layer, the second layer and the third layer. Two first conductor coils 10 are sequentially arranged along the circumferential direction of the stator core in the third layer, the fourth layer and the fifth layer. The two first conductor coils 10 located in the third layer, the fourth layer and the fifth layer are each shifted by one slot along the circumferential direction of the stator core (01 slot to 54 slot direction) relative to the two first conductor coils 10 located in the first layer, the second layer and the third layer, so that the two first conductor coils 10 arranged along the radial direction of the stator core in one magnetic pole are arranged in steps.

[0086] The first conductor coil 10 comprises a first conductor 100, a second conductor 101 and a third conductor 102, along the radial outermost layer to the radial innermost layer direction of the stator core, the second conductor 101 is arranged outside the third conductor 102, the second conductor 101 and the third conductor 102 are arranged in a surrounding manner, the twist direction of the turning part of the second conductor 101 is the same as the twist direction of the turning part of the third conductor 102, the twist direction of the turning part of the second conductor 101 is different from the twist direction of the turning part of the first conductor 100, one slot inside of the first conductor 100 and one slot inside of the second conductor 101 are arranged in the same layer, the other slot inside of the first conductor 100 and the other slot inside of the second conductor 101 are arranged in two layers which are not adjacent respectively, and there is one layer between the two layers, for example, the two slot insides of the first conductor 100 are located in the first layer and the second layer, and the two groups of slot insides of the second conductor 101 and the third conductor 102 are located in the second layer and the third layer respectively. The three slot insides of the first conductor 100, the second conductor 101 and the third conductor 102 located in the same layer are arranged in three adjacent slots along the circumferential direction of the stator core, the other slot inside of the second conductor 101 and the other slot inside of the third conductor 102 are arranged in adjacent slots along the circumferential direction of the stator core, the other slot inside of the first conductor 100 and the other slot inside of the third conductor 102 are not arranged adjacent along the circumferential direction of the stator core, and there is one slot between the two slot insides.

[0087] Wherein, the pitch of the first conductor 100 is 7, the pitch of the second conductor 101 is 12, and the pitch of the third conductor 102 is 10.

[0088] The connection structure 20 is arranged in two adjacent layers along the radial direction of the stator core, two connection structures 20 are arranged in the fifth layer and the sixth layer along the circumferential direction of the stator core in sequence, along the radial direction of the stator core, a plurality of first conductor coils 10 are arranged in other layers of the magnetic pole where one connection structure 20 is located, the two connection structures 20 located in the fifth layer and the sixth layer are shifted by one slot along the circumferential direction of the stator core (01 slot to 54 slot direction) relative to the two first conductor coils 10 located in the third layer, the fourth layer and the fifth layer, so that the two first conductor coils 10 arranged along the radial direction of the stator core and the one connection structure 20 located in one magnetic pole are arranged in a stepped manner.

[0089] The structure of the connection structure 20 is as follows: the connection structure 20 comprises the first conductor 100, the fourth conductor 201 and the fifth conductor 202, along the radial direction of the stator core, the fourth conductor 201 is arranged outside the fifth conductor 202, the fourth conductor 201 and the fifth conductor 202 are arranged in a surrounding manner, the twist direction of the turning part of the fourth conductor 201 is the same as the twist direction of the turning part of the fifth conductor 202, the twist direction of the turning part of the fourth conductor 201 is different from the twist direction of the turning part of the first conductor 100, one slot inside of the first conductor 100 and one slot inside of the fourth conductor 201 are arranged in the same layer, the other slot inside of the first conductor 100 and the other slot inside of the fourth conductor 201 are arranged in two adjacent layers respectively, for example, the two slot insides of the first conductor 100 are arranged in the fifth layer and the sixth layer, and the two slot insides of the fourth conductor 201 and the fifth conductor 202 are arranged in the sixth layer. The three slot insides of the first conductor 100, the fourth conductor 201 and the fifth conductor 202 arranged in the same layer are arranged in three adjacent slots along the circumferential direction of the stator core, the other slot inside of the fourth conductor 201 and the other slot inside of the fifth conductor 202 are arranged in adjacent slots along the circumferential direction of the stator core, and the other slot inside of the first conductor 100 and the other slot inside of the fifth conductor 202 are arranged in the same slot along the circumferential direction of the stator core.

[0090] In the present embodiment, the pitch of the fourth conductor 201 is 10, and the pitch of the fifth conductor 202 is 8.

[0091] The structure of another connection structure 20 is as follows: the connection structure 20 is a single conductor structure, and the connection structure 20 comprises one first conductor 100, and the two slot insides of the first conductor 100 are arranged in the fifth layer and the sixth layer respectively.

[0092] The second conductor coils 30 are arranged in two adjacent layers along the radial direction of the stator core, and four second conductor coils 30 are arranged in the first layer and the second layer along the circumferential direction of the stator core in sequence, four second conductor coils 30 are arranged in the third layer and the fourth layer along the circumferential direction of the stator core in sequence, four second conductor coils 30 are arranged in the fifth layer and the sixth layer along the circumferential direction of the stator core in sequence, the four second conductor coils 30 arranged in the third layer and the fourth layer are each shifted by one slot to the right (01 slot to 54 slot direction) along the circumferential direction of the stator core relative to the four second conductor coils 30 arranged in the first layer and the second layer, and the four second conductor coils 30 arranged in the fifth layer and the sixth layer are each shifted by one slot to the right along the circumferential direction of the stator core relative to the four second conductor coils 30 arranged in the third layer and the fourth layer, so that the three second conductor coils 30 arranged along the radial direction of the stator core in one magnetic pole are arranged in a stepped manner.

[0093] The second conductor coil 30 comprises the first conductor 100, the sixth conductor 301 and the seventh conductor 302, and the first conductor 100, the sixth conductor 301 and the seventh conductor 302 are arranged in a surrounding manner along the direction from the radially innermost layer to the radially outermost layer of the stator core, the seventh conductor 302 is arranged outside the sixth conductor 301, the sixth conductor 301 is arranged outside the first conductor 100, the twist directions of the turn portions of the first conductor 100, the sixth conductor 301 and the seventh conductor 302 are the same, the corresponding slot interiors of one group of the first conductor 100, the sixth conductor 301 and the seventh conductor 302 are arranged in the same layer and in three adjacent slots, and the corresponding slot interiors of another group of the first conductor 100, the sixth conductor 301 and the seventh conductor 302 are arranged in the same layer and in three adjacent slots.

[0094] The pitch of the sixth conductor 301 is 9, and the pitch of the seventh conductor 302 is 11.

[0095] In any phase winding, two parallel branches are included, the inlet end and the outlet end of the two parallel branches are located at the plug-in end of the stator winding, and the inlet end and the outlet end of the two parallel branches are located at the radially first layer of the stator core, and the inlet end and the outlet end of the two parallel branches are located in the two magnetic poles provided with the first conductor coil 10.

[0096] Specifically, at the plug-in end of a phase winding, at the first layer and the second layer, the first second conductor coil 30 is located at the first layer 10th slot, 11th slot and 12th slot, and the second layer 01st slot, 02nd slot and 03rd slot, the second second conductor coil 30 is located at the first layer 37th slot, 38th slot and 39th slot, and the second layer 28th slot, 29th slot and 30th slot, the third second conductor coil 30 is located at the first layer 46th slot, 47th slot and 48th slot, and the second layer 37th slot, 38th slot and 39th slot, and the fourth second conductor coil 30 is located at the first layer 01st slot, 02nd slot and 03rd slot, and the second layer 46th slot, 47th slot and 48th slot; the first first conductor coil 10 is located at the first layer 19th slot, the second layer 10th slot, 11th slot and 12th slot, and the third layer 21st slot and 22nd slot, and the second first conductor coil 10 is located at the first layer 28th slot, the second layer 19th slot, 20th slot and 21st slot, and the third layer 30th slot and 31st slot.

[0097] In the third layer and the fourth layer, the first second conductor coil 30 is located in the third layer 11 slot, 12 slot, 13 slot and the fourth layer 02 slot, 03 slot, 04 slot, the second second conductor coil 30 is located in the third layer 38 slot, 39 slot, 40 slot and the fourth layer 29 slot, 30 slot, 31 slot, the third second conductor coil 30 is located in the third layer 47 slot, 48 slot, 49 slot and the fourth layer 38 slot, 39 slot, 40 slot, the fourth second conductor coil 30 is located in the third layer 02 slot, 03 slot, 04 slot and the fourth layer 47 slot, 48 slot, 49 slot; the first first conductor coil 10 is located in the third layer 20 slot, the fourth layer 11 slot, 12 slot, 13 slot and the fifth layer 22 slot, 23 slot, the second first conductor coil 10 is located in the third layer 29 slot, the fourth layer 20 slot, 21 slot, 22 slot and the fifth layer 31 slot, 32 slot;

[0098] In the fifth layer and the sixth layer, the first second conductor coil 30 is located in the fifth layer 12 slot, 13 slot, 14 slot and the sixth layer 03 slot, 04 slot, 05 slot, the second second conductor coil 30 is located in the fifth layer 39 slot, 40 slot, 41 slot and the sixth layer 30 slot, 31 slot, 32 slot, the third second conductor coil 30 is located in the fifth layer 48 slot, 49 slot, 50 slot and the sixth layer 39 slot, 40 slot, 41 slot, the fourth second conductor coil 30 is located in the fifth layer 03 slot, 04 slot, 05 slot and the sixth layer 48 slot, 49 slot, 50 slot; the first connecting structure 20 is located in the fifth layer 21 slot, the sixth layer 12 slot, 13 slot, 14 slot, 21 slot, 22 slot, the second connecting structure 20 is located in the fifth layer 30 slot and the sixth layer 23 slot.

[0099] The incoming line end and the outgoing line end of the first parallel branch are located in the 20 slot and the 29 slot of the first layer respectively, and the incoming line end and the outgoing line end of the second parallel branch are located in the 21 slot and the 30 slot of the first layer respectively.

[0100] In the welding end of the phase winding, each welding conductor coil 40 includes three welding conductors 400, the pitch of the welding conductor 400 is 9, the welding conductor coil 40 is arranged in adjacent two layers, in the first layer and the second layer, 6 welding conductor coils 40 are arranged along the circumferential direction of the stator core, in the third layer and the fourth layer, 6 welding conductor coils 40 are arranged along the circumferential direction of the stator core, in the fifth layer and the sixth layer, 6 welding conductor coils 40 are arranged along the circumferential direction of the stator core. In the same magnetic pole, the adjacent two welding conductor coils 40 arranged along the radial direction of the stator core are arranged adjacent to each other along the circumferential direction of the stator core, and the two welding conductor coils 40 are arranged in adjacent slots along the circumferential direction of the stator core.

[0101] Embodiment two

[0102] As Figure 3 And 4As shown, compared with Embodiment 1, the slots of each second conductor coil 30 and each first conductor coil 10 in the first and second layers are different from those of each second conductor coil 30 and each connecting structure 20 in the fifth and sixth layers. The pitches of the second conductor 101 and the third conductor 102 in the first conductor coil 10 are different, but the rest of the settings are the same.

[0103] In this embodiment, the slots where the second conductor coils 30 and the first conductor coils 10 are located in the first and second layers are shifted two slots to the right (from slot 01 to slot 54) relative to the slots where the second conductor coils 30 and the first conductor coils 10 are located in the first and second layers in Embodiment 1. The slots where the second conductor coils 30 and the first conductor coils 10 are located in the third and fourth layers are the same as the slots where the second conductor coils 30 and the first conductor coils 10 are located in the third and fourth layers in Embodiment 1. The slots where the second conductor coils 30 and the connecting structures 20 are located in the fifth and sixth layers are shifted two slots to the left (from slot 54 to slot 01) relative to the slots where the second conductor coils 30 and the connecting structures 20 are located in the fifth and sixth layers in Embodiment 1. The pitch of the second conductor 101 is 10, and the pitch of the third conductor 102 is 8.

[0104] Example 3

[0105] like Figure 5 and 6 As shown, compared with Embodiment 1, the pitch and arrangement of the second conductor 101 and the third conductor 102 in the first conductor coil 10 are different in this embodiment, but the rest are the same. In this embodiment, the second conductor 101 and the third conductor 102 are arranged in adjacent slots along the circumferential direction of the stator core, and the pitch of the second conductor 101 and the pitch of the third conductor 102 are both 11.

[0106] Example 4

[0107] like Figure 7 and 8 As shown, compared with Embodiment 2, the pitch and arrangement of the second conductor 101 and the third conductor 102 in the first conductor coil 10 are different, but the rest are the same. In this embodiment, the second conductor 101 and the third conductor 102 are arranged in adjacent slots along the circumferential direction of the stator core, and the pitch of the second conductor 101 and the pitch of the third conductor 102 are both 9.

[0108] According to the technical scheme, the stator winding is composed of multiple types of conductor coils, the lead-out end of each phase winding is arranged at the plug-in end side of the stator winding, in the same magnetic pole, the multiple conductor coils arranged in sequence along the radial direction of the stator core are arranged in steps, the multiple conductor coils are arranged in sequence and adjacent along the same circumferential direction of the stator core, so that the short-distance conductor arrangement in the slot of the stator core is relatively uniform; at the plug-in end of each phase winding, in any two adjacent magnetic poles, multiple first conductor coils and at least one connecting structure are arranged in sequence along the radial direction of the stator core, the connecting structures in the two magnetic poles are different in structure, in the multiple conductors in the first conductor coil, the twist wire direction of the turning part of a part of the conductors is different from the twist wire direction of the turning part of another part of the conductors, and the first conductor coil is arranged in three adjacent layers along the radial direction of the stator core, the two parts of the conductors are arranged in two adjacent layers along the radial direction of the stator core, one group of slot interiors of a part of the conductors and one group of slot interiors of another part of the conductors are arranged in the same layer, another group of slot interiors of a part of the conductors and another group of slot interiors of another part of the conductors are arranged in two non-adjacent layers, and the two layers are separated by at least one layer, the connecting structure is arranged in two adjacent layers along the radial direction of the stator core, a part of the conductors is arranged in two adjacent layers along the radial direction of the stator core, and another part of the conductors is arranged in the same layer along the radial direction of the stator core, and the corresponding one group of slot interiors of the two parts of the conductors is arranged in the same layer, in other magnetic poles, multiple second conductor coils are arranged in sequence along the radial direction of the stator core, the multiple conductors in the second conductor coil are arranged in a surrounding manner, so that the short-distance conductor arrangement in the slot is relatively more uniform, arranged in steps, and better solving the problems of NVH and noise; the pitch and the twist wire direction of the turning part of at least one conductor in the first conductor coil and at least one conductor in the connecting structure are the same, the lead-in end and the lead-out end of each parallel branch are located in two magnetic poles where the first conductor coil is located, and the lead-in end and the lead-out end of each parallel branch are located on the same side of the radial direction of the stator core, so that the short-distance conductor arrangement in the slot is relatively more uniform, better solving the problems of NVH and noise, and reducing the noise of the motor.

[0109] The above describes the embodiments of the utility model in detail, but the content described can only be the preferred embodiments of the utility model, and cannot be considered as limiting the implementation scope of the utility model. Any equivalent changes and improvements made within the scope of the utility model application should still belong to the patent coverage of the utility model.

Claims

1. A stator winding, comprising a multi-phase winding, characterized in that: In any phase winding, multiple first conductor coils are sequentially arranged along the radial direction of the stator core within two adjacent magnetic poles. The twist direction of the bend of a portion of the first conductor coil is different from the twist direction of the bend of another portion of the conductor. In other magnetic poles, multiple second conductor coils are sequentially arranged along the radial direction of the stator core, and the twisting direction of the bends of the multiple conductors in the second conductor coils is the same; The lead-out terminal of each phase winding is located at the plug-in terminal of that phase winding.

2. The stator winding according to claim 1, characterized in that: The twist direction of the bend in at least one conductor in the first conductor coil is the same as the twist direction of the bend in at least one conductor in the second conductor coil.

3. The stator winding according to claim 2, characterized in that: The first conductor coil and the second conductor coil have the same pitch, with the conductors having the same twist direction at the bend.

4. The stator winding according to claim 1, characterized in that: At least one connecting structure is provided within the magnetic pole where the plurality of first conductor coils are located. Along the radial direction of the stator core, the connecting structure is located on one side of the plurality of first conductor coils. The connecting structure is a conductor coil structure or a bus.

5. The stator winding according to claim 4, characterized in that: The twist direction of the bend of at least one conductor in the connection structure is the same as the twist direction of the bend of at least one conductor in the second conductor coil, and the twist direction of the bend of at least one conductor in the connection structure is the same as the twist direction of the bend of at least one conductor in the first conductor coil.

6. The stator winding according to claim 5, characterized in that: The connection structure, the conductors in the first conductor coil and the second conductor coil with the same twist direction at the bend have the same pitch.

7. The stator winding according to any one of claims 1-6, characterized in that: The multiple conductors in the first conductor coil are configured as at least two parts. In two adjacent parts of the conductor along the radial direction of the stator core, the two sets of slots of one part of the conductor are respectively located in the radial Nth layer and the radial N+1th layer of the stator core, and the two sets of slots of the other part of the conductor are respectively located in the radial N+1th layer and the radial N+2th layer of the stator core, where N is an odd number.

8. The stator winding according to claim 7, characterized in that: In the first conductor coil, among two adjacent conductors along the radial direction of the stator core, one set of slots of one conductor and the other set of slots of the other conductor are located in adjacent slots along the circumferential direction of the stator core, and the other set of slots of one conductor and the other set of slots of the other conductor are separated by at least one slot along the circumferential direction of the stator core.

9. The stator winding according to claim 7, characterized in that: The number of conductors in the two sets of slots of a portion of the first conductor coil, respectively located in the radial Nth layer and the radial N+1th layer of the stator core, is at least one. The number of conductors in the two sets of slots of the other portion of the first conductor coil, respectively located in the radial N+1th layer and the radial N+2th layer of the stator core, is at least two. The multiple conductors in each portion are arranged in an encircling manner or adjacent to each other along the circumferential direction of the stator core.

10. The stator winding according to any one of claims 1-6 and 8-9, characterized in that: The two sets of slots of the multiple conductors of the second conductor coil are located in two radially adjacent layers of the stator core.

11. The stator winding according to any one of claims 4-6, characterized in that: The connection structure includes a conductor arranged in two adjacent layers along the radial direction of the stator core; or, The connection structure includes multiple conductors, which are configured as at least two parts. In two adjacent parts of the conductor along the radial direction of the stator core, the two sets of slots of one part of the conductor are located in the same radial layer of the stator core, and the two sets of slots of the other part of the conductor are located in two adjacent radial layers of the stator core. Furthermore, the slots of one part of the conductor and the slots of the other part of the conductor are located in the same layer of the stator core.

12. The stator winding according to claim 11, characterized in that: In the connection structure, among two adjacent conductors along the radial direction of the stator core, one set of slots of one conductor and one set of slots of the other conductor are located in adjacent slots along the circumferential direction of the stator core, and at least one of the other sets of slots of one conductor and another set of slots of the other conductor are located in the same slot along the circumferential direction of the stator core.

13. The stator winding according to claim 11, characterized in that: In the connection structure, the number of conductors in the same radial layer of the stator core in the two sets of slots of one part of the conductor is at least two, and the number of conductors in the adjacent radial layers of the stator core in the two sets of slots of the other part of the conductor is at least one. The multiple conductors in each part are arranged in an encircling manner or adjacently along the circumferential direction of the stator core.

14. The stator winding according to any one of claims 4-6 and 12-13, characterized in that: The lead-out end and the connection structure are respectively located on the radial sides of the stator core, and the lead-out end is located inside the magnetic pole where the first conductor coil is located.

15. The stator winding according to claim 1, characterized in that: The stator core has an even number of radial layers, which is greater than or equal to 4; the welding end of any phase winding includes multiple welding conductor coils, and the multiple welding conductors in the welding conductor coils have the same pitch, and the multiple welding conductors are arranged in adjacent slots along the circumferential direction of the stator core.

16. A stator, characterized in that: Includes the stator winding as described in any one of claims 1-15.

17. An electric motor, characterized in that: Includes the stator as described in claim 16.

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