CN211508736U

CN211508736U - Motor stator and motor

Info

Publication number: CN211508736U
Application number: CN202020310141.4U
Authority: CN
Inventors: 刘延海; 柏荣键
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Borgwarner Powertrain Tianjin Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-09-15
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses a motor stator and motor, include: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; stator winding, stator winding installs on stator core, wherein, stator winding is the three-phase, each phase stator winding radially establishes ties in proper order along stator core and follows stator core circumference and establish ties in proper order and connect in series, stator winding includes: the first coil group, the at least one second coil group and the third coil group are sleeved from inside to outside in sequence; the adopted U-shaped conductors are few in types and simple in arrangement mode, the fact that the twisting direction and the twisting groove distance of the outer end portion of the groove, which is located in the inner groove of the stator core and extends towards the inner groove of the same layer, are inconsistent can be eliminated, the lead ends and neutral points between the windings of each phase are arranged on any layer of the same radial groove, the complexity of the manufacturing process is reduced, and the machining efficiency is improved.

Description

Motor stator and motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor stator and motor.

Background

The stator winding comprises a plurality of hairpin coils, and the hairpin coils penetrate into the slots of the stator core according to a certain arrangement mode to form the required winding of the single-phase motor or the multi-phase motor;

in the prior art, more than 90% of stator windings are all provided with the number of slots of each pole and each phase being more than or equal to 2, but if the stator windings are connected in series among phases or connected in parallel among phases and multiple branches, the twisting directions of the outer end parts of the slots in the same layer or the distances among the twisting slots are inconsistent, the manufacturing process is complex, the forming is difficult, the production cost is high, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and motor, the type of the U-shaped conductor of adoption is few, and the mode of arranging is simple, can reduce the use of busbar and busbar, can cancel the outer tip distortion direction of the inslot that is located the same one deck of stator iron core inslot radial extension and twist the slot pitch nonconformity, realizes that lead terminal and neutral point between each phase winding set up in the arbitrary layer in the arbitrary groove of same radial, and then reduces the preparation technology complexity, reduction in production cost improves machining efficiency.

The utility model provides a motor stator, include:

a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

a stator winding mounted on the stator core,

wherein, stator winding is the three-phase, each phase stator winding is followed stator core radially establishes ties in proper order the back along stator core circumference series connection in proper order, stator winding includes: the first coil group, the at least one second coil group and the third coil group are sleeved from inside to outside in sequence;

wherein the second coil assembly has a plurality of second U-shaped conductors, the second U-shaped conductors comprising:

the inner parts of the two slots are positioned in two radially adjacent layers of the stator core and are separated by a specified slot distance, and the inner parts of the plurality of second U-shaped conductors of the second coil group are sequentially positioned in two radially adjacent layers of the stator core slots along the circumferential direction of the stator core;

the two outer ends of the slots are positioned at one axial end of the stator core and connected with the two inner parts of the slots, and the two outer ends of the slots are positioned at the circumferential direction of the stator core, extend for a specified slot distance and have opposite and close extending directions; the outer ends of a plurality of grooves of the plurality of second U-shaped conductors of the second coil group are sequentially positioned on two adjacent layers of stator iron core grooves along the circumferential direction of the stator iron core;

the first coil set has a plurality of first U-shaped conductors, the first U-shaped conductors comprising:

the two slot interiors are positioned in two slots of the stator core at a specified slot pitch, and the slot interiors of the first U-shaped conductors of the first coil group are sequentially positioned in the stator core slots along the circumferential direction of the stator core;

the two outer slot ends are positioned at one axial end of the stator core and connected with the two inner slots, the two outer slot ends are positioned at the circumferential direction of the stator core and extend for a specified slot distance, the extending directions of the two outer slot ends are the same, and the outer slot ends of the first U-shaped conductors of the first coil group are sequentially positioned outside the stator core slot along the circumferential direction of the stator core;

the third coil set has a plurality of third U-shaped conductors, the third U-shaped conductors comprising:

the two slot interiors are positioned in two slots of the stator core which are separated by a specified slot distance, and the plurality of slot interiors of the plurality of third U-shaped conductors of the third coil group are sequentially positioned in the stator core slots along the circumferential direction of the stator core;

the two outer ends of the slots are positioned at one axial end of the stator core and connected with the two inner parts of the slots, and the two outer ends of the slots are positioned at the circumferential direction of the stator core and extend for a specified slot distance in the same extending direction; the outer end parts of a plurality of grooves of the plurality of third U-shaped conductors of the third coil group are sequentially positioned outside the stator core groove along the circumferential direction of the stator core;

the plurality of out-of-slot ends of the first U-shaped conductor of the first coil group are opposite to the plurality of out-of-slot ends of the third U-shaped conductor of the third coil group in the extending direction of the stator core in the circumferential direction.

Furthermore, the plurality of slot interiors of the plurality of first U-shaped conductors of the first coil group are located in the same radial layer of the stator core, and the extending slot distances of the plurality of slot outer ends of the plurality of first U-shaped conductors of the first coil group along the circumferential direction of the stator core are the same; and/or a plurality of groove inner parts of the plurality of third U-shaped conductors of the third coil group are positioned in the same layer of the stator core in the radial direction, and a plurality of groove outer end parts of the plurality of third U-shaped conductors of the third coil group have the same extending groove distance along the circumferential direction of the stator core.

The first U-shaped conductor of the first coil group further comprises an outer-slot turning part, wherein the outer-slot turning part is positioned at the other end outside the axial slot of the stator core and is connected with the inner parts of two slots of the first U-shaped conductor of the first coil group;

the second U-shaped conductor of the second coil assembly further comprises: an out-of-slot turn located at the other end of the stator core axial out-of-slot, connecting two in-slot portions of the second plurality of U-shaped conductors of the second coil assembly;

the third U-shaped conductor of the third coil set further comprises: an out-of-slot turn located at the other end of the stator core axial out-of-slot, connecting two in-slot portions of the plurality of third U-shaped conductors of the third coil group;

the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is different from the pitch of the out-of-slot turns of the first U-shaped conductor of the first coil assembly, and/or the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is different from the pitch of the out-of-slot turns of the third U-shaped conductor of the third coil assembly.

Further, a pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is different from a pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group, and a pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is the same as a pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group.

Further, the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is a full pitch, the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group is a short pitch, and the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

Further, the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is a full pitch, the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group is a long pitch, and the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

Further, a pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is different from a pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group, and the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is the same as the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group.

Further, the pitch of the out-of-slot turning part of the second U-shaped conductor of the second coil group is a short pitch, the pitch of the out-of-slot turning part of the first U-shaped conductor of the first coil group is a short pitch, and the pitch of the out-of-slot turning parts of the three U-shaped conductors of the third coil group is a full pitch.

Further, the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is a long pitch, the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group is a long pitch, and the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

Further, a pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is different from a pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group, and a pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is different from a pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group.

Further, the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is a short pitch, the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group is a long pitch, and the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

Further, the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is a long pitch, the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group is a short pitch, and the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

The stator core further comprises a stator winding, wherein the outer end part of the slot of the stator winding is provided with an extending end, except the extending end connected with the outgoing line, the extending end of the outer end part of the slot of the N-1 layers which are adjacent to the same radial direction of the stator core is connected with the extending end of the outer end part of the slot of the N layers, and the pitch of the two connected outer end parts of the slot which are positioned outside the stator core slot and extend in the circumferential direction is a short pitch.

Furthermore, the outer end part of the slot of the stator winding is provided with an extension end, except the extension end connected with the outgoing line, the extension end of the outer end part of the slot of the N-1 layers which are adjacent to each other in the same radial direction of the stator core is connected with the extension end of the outer end part of the slot of the N layers, and the pitch of the two connected outer end parts of the slot which are positioned outside the slot of the stator core and extend in the circumferential direction is a whole pitch.

Furthermore, the outer end part of the slot of the stator winding is provided with an extension end, except the extension end connected with the outgoing line, the extension end of the outer end part of the slot of the N-1 layers which are adjacent to each other in the same radial direction of the stator core is connected with the extension end of the outer end part of the slot of the N layers, and the pitch of the two connected outer end parts of the slot which are located outside the slot of the stator core and extend in the circumferential direction is a long pitch.

The utility model also provides a motor, include: a rotor and a motor stator as described in any of the above.

Use the technical scheme of the utility model, motor stator, include: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; stator winding, stator winding installs on the stator core, wherein, stator winding is the three-phase, each phase stator winding follows the stator core radially establishes ties in proper order the back along stator core circumference series connection in proper order, stator winding includes: the first coil group, the at least one second coil group and the third coil group are sleeved from inside to outside in sequence; wherein the second coil assembly has a plurality of second U-shaped conductors, the second U-shaped conductors comprising: the inner parts of the two slots are positioned in two radially adjacent layers of the stator core and are separated by a specified slot distance, and the inner parts of the plurality of second U-shaped conductors of the second coil group are sequentially positioned in two radially adjacent layers of the stator core slots along the circumferential direction of the stator core; the two outer ends of the slots are positioned at one axial end of the stator core and connected with the two inner parts of the slots, and the two outer ends of the slots are positioned at the circumferential direction of the stator core, extend for a specified slot distance and have opposite and close extending directions; the outer ends of a plurality of grooves of the plurality of second U-shaped conductors of the second coil group are sequentially positioned on two adjacent layers of stator iron core grooves along the circumferential direction of the stator iron core; the first coil set has a plurality of first U-shaped conductors, the first U-shaped conductors comprising: the two slot interiors are positioned in two slots of the stator core at a specified slot pitch, and the slot interiors of the first U-shaped conductors of the first coil group are sequentially positioned in the stator core slots along the circumferential direction of the stator core; the two outer slot ends are positioned at one axial end of the stator core and connected with the two inner slots, the two outer slot ends are positioned at the circumferential direction of the stator core and extend for a specified slot distance, the extending directions of the two outer slot ends are the same, and the outer slot ends of the first U-shaped conductors of the first coil group are sequentially positioned outside the stator core slot along the circumferential direction of the stator core; the third coil set has a plurality of third U-shaped conductors, the third U-shaped conductors comprising: the two slot interiors are positioned in two slots of the stator core which are separated by a specified slot distance, and the plurality of slot interiors of the plurality of third U-shaped conductors of the third coil group are sequentially positioned in the stator core slots along the circumferential direction of the stator core; the two outer ends of the slots are positioned at one axial end of the stator core and connected with the two inner parts of the slots, and the two outer ends of the slots are positioned at the circumferential direction of the stator core and extend for a specified slot distance in the same extending direction; the outer end parts of a plurality of grooves of the plurality of third U-shaped conductors of the third coil group are sequentially positioned outside the stator core groove along the circumferential direction of the stator core; the plurality of outer slot ends of the plurality of first U-shaped conductors of the first coil group are opposite to the plurality of outer slot ends of the plurality of third U-shaped conductors of the third coil group in the extending direction of the stator core in the circumferential direction. The utility model provides a motor stator's technical scheme adopted U-shaped conductor's kind is few, and the mode of arranging is simple, can reduce the use of busbar and busbar, can cancel the outer tip distortion direction of the inslot portion that is located the same layer of stator iron core inslot radial extension and twist the slot pitch nonconformity, realizes that lead terminal and neutral point between each phase winding set up in any layer of same radial arbitrary groove, and then reduces the preparation technology complexity, reduction in production cost improves machining efficiency. Therefore, the technical scheme of the application effectively solves the problems of inconsistent twisting direction of the outer end part of the coil slot or the distance between the twisting slots, complex manufacturing process, difficult forming, high production cost and low processing efficiency in the prior art.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a structural diagram of a motor stator according to a first embodiment of the present invention;

fig. 2 is a structural diagram of a stator winding according to an embodiment of the present invention;

fig. 3 is a structural diagram of a one-phase stator winding according to an embodiment of the present invention;

fig. 4 is a structural diagram of a first U-shaped conductor 210 according to an embodiment of the present invention;

fig. 5 is a structural diagram of a second U-shaped conductor 220 according to an embodiment of the present invention;

fig. 6 is a structural diagram of a third U-shaped conductor 230 according to an embodiment of the present invention;

fig. 7 is a plan view of a phase stator winding according to an embodiment of the present invention;

fig. 8 is a structural diagram of a motor stator according to a second embodiment of the present invention;

fig. 9 is a structural diagram of a stator winding according to a second embodiment of the present invention;

fig. 10 is a structural diagram of a one-phase stator winding according to a second embodiment of the present invention;

fig. 11 is a structural diagram of a first U-shaped conductor 210 according to a second embodiment of the present invention;

fig. 12 is a structural diagram of a second U-shaped conductor 220 according to a second embodiment of the present invention;

fig. 13 is a structural diagram of a third U-shaped conductor 230 according to the second embodiment of the present invention;

fig. 14 is a plan view of a one-phase stator winding according to a second embodiment of the present invention;

fig. 15 is a structural diagram of a motor stator according to a third embodiment of the present invention;

fig. 16 is a structural diagram of a stator winding according to a third embodiment of the present invention;

fig. 17 is a structural diagram of a one-phase stator winding according to a third embodiment of the present invention;

fig. 18 is a structural diagram of a first U-shaped conductor 210 according to a third embodiment of the present invention;

fig. 19 is a structural diagram of a second U-shaped conductor 220 according to a third embodiment of the present invention;

fig. 20 is a structural diagram of a third U-shaped conductor 230 according to a third embodiment of the present invention;

fig. 21 is a plan view of a stator winding of one phase according to a third embodiment of the present invention;

fig. 22 is a structural diagram of a motor stator according to a fourth embodiment of the present invention;

fig. 23 is a structural diagram of a stator winding according to a fourth embodiment of the present invention;

fig. 24 is a structural diagram of a one-phase stator winding according to a fourth embodiment of the present invention;

fig. 25 is a structural diagram of a first U-shaped conductor 210 according to a fourth embodiment of the present invention;

fig. 26 is a structural diagram of a second U-shaped conductor 220 according to a fourth embodiment of the present invention;

fig. 27 is a structural view of a third U-shaped conductor 230 according to a fourth embodiment of the present invention;

fig. 28 is a plan view of a one-phase stator winding according to the fourth embodiment of the present invention;

fig. 29 is a structural diagram of a motor stator according to a fifth embodiment of the present invention;

fig. 30 is a structural diagram of a stator winding according to a fifth embodiment of the present invention;

fig. 31 is a structural diagram of a one-phase stator winding according to a fifth embodiment of the present invention;

fig. 32 is a structural diagram of a first U-shaped conductor 210 according to a fifth embodiment of the present invention;

fig. 33 is a structural diagram of a second U-shaped conductor 220 according to a fifth embodiment of the present invention;

fig. 34 is a structural diagram of a third U-shaped conductor 230 according to a fifth embodiment of the present invention;

fig. 35 is a plan view of a one-phase stator winding according to a fifth embodiment of the present invention;

fig. 36 is a structural diagram of a stator of an electric motor according to a sixth embodiment of the present invention;

fig. 37 is a structural diagram of a stator winding according to a sixth embodiment of the present invention;

fig. 38 is a structural view of a one-phase stator winding according to a sixth embodiment of the present invention;

fig. 39 is a structural view of a first U-shaped conductor 210 according to a sixth embodiment of the present invention;

fig. 40 is a structural diagram of a second U-shaped conductor 220 according to a sixth embodiment of the present invention;

fig. 41 is a structural view of a third U-shaped conductor 230 according to a sixth embodiment of the present invention;

fig. 42 is a plan view of a one-phase stator winding according to a sixth embodiment of the present invention;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not intended to limit a specific order. The embodiments of the present invention can be implemented individually, and can be implemented by combining each other between the embodiments, and the embodiments of the present invention are not limited to this.

The utility model provides a motor stator. In fig. 1, 8, 15, 22, 30, and 37, the extending direction of A1a2 is parallel to the axial direction of the stator core, the extending direction of B1B2 is the circumferential direction of the stator core, and 0102, 0103, and 0104 are three directions extending in the radial direction of the stator core, which are exemplarily shown.

As shown in fig. 1, an embodiment of the present invention provides a motor stator, including: a stator core 20 having a plurality of slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

as shown in fig. 1 to 3, 8 to 10, 15 to 17, 22 to 24, 29 to 31, and 36 to 38, a stator winding 10 is mounted on the stator core 20, wherein the stator winding 10 has three phases, and the stator windings 10 of the respective phases are sequentially connected in series along a radial direction of the stator core and then sequentially connected in series along a circumferential direction of the stator core;

with reference to fig. 1 to 3, 8 to 10, 15 to 17, 22 to 24, 29 to 31, and 36 to 38, in the present embodiment, a stator winding 10 is provided, and the stator winding 10 is mounted on a stator core 20, wherein the stator winding 10 is three-phase (i.e., U-phase, V-phase, and W-phase) and each pole has 2 or more slots per phase; each magnetic pole of the rotor is provided with two slots 21, the number of slots per pole per phase is 2 in the embodiment, the rotor has eight magnetic poles and is corresponding to each phase of the three-phase stator winding 10, the number of the slots 21 arranged in the stator core 20 is equal to 48 (namely, 2X8X3), as shown in fig. 3, U-phase stator windings are sequentially connected in series along the radial direction of the stator core and then sequentially connected in series along the circumferential direction of the stator core, V-phase stator windings are sequentially connected in series along the radial direction of the stator core and then sequentially connected in series along the circumferential direction of the stator core, and W-phase stator windings are sequentially connected in series along the radial direction of the stator core and then sequentially connected in series along; further, in the present embodiment, the stator core 2 defines one tooth 22 by two adjacent slots 21, and the stator core 20 is formed by laminating a plurality of annular magnetic steel plates in which a plurality of insulating papers are inserted (not shown in the present figure) to form both end faces 25, 26 in the axial direction of the stator core. Exemplarily, as shown in fig. 1 to 2, 8 to 9, 15 to 16, 22 to 23, 29 to 30, 36 to 37, the stator winding 10 includes: the first coil group 110, the at least one second coil group 120 and the third coil group 130 are sleeved from inside to outside in sequence;

with reference to fig. 1 to 2 or fig. 8 to 9 or fig. 15 to 16 or fig. 22 to 23 or fig. 29 to 30 or fig. 36 to 37, in the present embodiment, the first coil group 110 is located at the inner side of the stator core in the radial direction, i.e., in the direction close to the inner surface of the stator core in the radial direction, in the present embodiment, the first coil group 110 is located at the inner side of the stator core in the radial direction, one second coil group 120 is located at the middle of the stator core in the radial direction, and the third coil group 130 is located at the outer side of the stator core in the radial direction, i.e., in the direction; correspondingly, each coil group in the stator winding 10 may also be sequentially sleeved from inside to outside with the first coil group 110 located on the radial inner side of the stator core, i.e., away from the radial inner surface direction of the stator core, the second coil group 120 located in the radial middle of the stator core, and the third coil group 130 located on the radial outer side of the stator core, i.e., close to the radial inner side direction of the stator core (sequentially sleeved from inside to outside, where the inner side may be close to the radial inner surface direction of the stator core, and may also be away from the radial inner surface direction of the stator core, where the outer side may be away from the radial inner surface direction of the stator core, and may also be close to the radial inner surface direction of the stator core.

Illustratively, as shown in fig. 2, 3 and 5, the second coil group 120 has a plurality of second U-shaped conductors 210, and the second U-shaped conductors 210 include: two slot interiors 201, the two slot interiors 201 are located in two slots 21 which are adjacent to each other in the radial direction of the stator core 20 and are separated by a specified slot distance, and the plurality of slot interiors 201 of the plurality of second U-shaped conductors 220 of the second coil group 120 are sequentially located in two adjacent layers in the radial direction of the stator core slot 21 along the circumferential direction of the stator core 20; two outer slot ends 203, the two outer slot ends 203 are located at one axial end of the stator core 20 and are connected with the two inner slot portions 201, the two outer slot ends 203 are located at the circumferential direction of the stator core and extend for a specified slot pitch, and the extending directions are opposite and close; the plurality of outer slot ends 203 of the plurality of second U-shaped conductors of the second coil group 120 are sequentially positioned at two radially adjacent layers outside the stator core slot 21 along the circumferential direction of the stator core 20;

with reference to fig. 2, 3 and 5, in the present embodiment, the second coil group 120 has 48 second U-shaped conductors 220, and the second U-shaped conductors 220 include: the two slot inner parts 201 of the second U-shaped conductor 220 are positioned in two slots 21 with a specified slot distance, the two slot inner parts 201 are positioned in the middle two layers of the stator core slots 21, namely, the one slot inner part 201 is positioned in the two layers, and the other slot inner part 201 is positioned in the three layers; the two outer slot ends 203 of the second U-shaped conductor 220 extend in the circumferential direction of the stator core in the opposite directions and close to each other, as shown in fig. 5, in the present embodiment, the outer slot end 203 of the second U-shaped conductor 220 connected to the inner slot 201 of the second layer extends in the circumferential direction of the stator core in the direction close to the inner slot 201 of the second layer in the circumferential direction of the stator core, and the second U-shaped conductor 220 extends in the counterclockwise direction (the counterclockwise direction) in the direction close to the inner slot 201 of the second layer in the circumferential direction of the stator core, where the second U-shaped conductor 220 is located in the inner slot 201 of the third layer in the circumferential direction of the stator core, and the first inner slot 201 of the second U-shaped conductor 220 is located in the inner slot 26 of the stator core, the first inner slot 201 of the first U-shaped conductor 220 is located in the inner slot of the stator core, the first U-shaped conductor 220 is located in the second slot, and the first U-shaped conductor 220 is located in the axial slot of the stator core, and the second U-shaped conductor 220 is The outer end portion 203 extends in a direction (clockwise direction) in which it approaches the first slot inner portion 201 located in the second layer in the circumferential direction of the stator core, and as shown in fig. 5, the two slot outer end portions 203 extend in opposite directions and approach each other.

The two slot interiors 201 of the 48 second U-shaped conductors 220 of the second coil group 120 are sequentially located in two layers, namely the second layer and the third layer, of the 48 slots of the stator core along the circumferential direction of the stator core 20, the two slot outer ends 203 of the 48 second U-shaped conductors 220 of the second coil group 120 are sequentially located in two layers, namely the second layer and the third layer, of the 48 slots 21 of the stator core along the circumferential direction of the stator core 20, specifically, the first slot interior 201 of the first second U-shaped conductor 220 of the second coil group 120 is located in the second layer of the first slot, the second slot interior 201 of the first second U-shaped conductor 220 is located in the third layer of the seventh slot, the first slot interior 201 of the second U-shaped conductor 220 is located in the second layer of the second slot, the second slot interior 201 of the second U-shaped conductor 220 is located in the third layer of the eighth slot, the first slot interior 201 of the third second U-shaped conductor 220 of the second coil group 120 is located in the second layer of the third slot, the second slot interior 201 of the third second U-shaped conductor 220 is located in the third layer of the ninth slot, the first slot interior 201 of the fourth second U-shaped conductor 220 of the second coil group 120 is located in the second layer of the fourth slot, the second slot interior 201 of the fourth second U-shaped conductor 220 of the second coil group 120 is located in the third layer of the tenth slot, the first slot interior 201 of the fifth second U-shaped conductor 220 of the third coil group 120 is located in the second layer of the fifth slot, the second slot interior 201 of the fifth second U-shaped conductor 220 of the second coil group 120 is located in the third layer of the eleventh slot, the first slot interior 201 of the sixth second U-shaped conductor 220 of the second coil group 120 is located in the second layer of the sixth slot, the second slot interior 201 of the fifth second U-shaped conductor 220 of the second coil group 120 is located in the third layer of the twelfth slot, the first slot interior 201 of the seventh second U-shaped conductor 220 of the second coil group 120 is located in the second layer of the seventh slot, the second slot inside 201 of the seventh second U-shaped conductor 220 of the second coil group 120 is located in the third layer of the thirteenth slot, thereby sequentially inserting the 48 second U-shaped conductors into the second layer and the third layer of the 48 slots of the stator core; the first out-of-slot end 201 of the first and second U-shaped conductors 220 of the second coil group 120 is located outside the stator core slot, the second layer is close to the second in-slot direction of the first and second U-shaped conductors 220, and extends for 3 slot pitches, the second out-of-slot end 201 of the first and second U-shaped conductors 220 of the second coil group 120 is located outside the stator core slot, the third layer is close to the first in-slot direction of the first and second U-shaped conductors 220, and extends for 3 slot pitches, the first out-of-slot end 201 of the second and second U-shaped conductors 220 of the second coil group 120 is located outside the stator core slot, the second layer is close to the second in-slot direction of the second and second U-shaped conductors 220, and the second out-of-slot end 201 of the second and second U-shaped conductors 220 of the second coil group 120 is located outside the stator core slot, the second layer is close to the first in-slot direction of the second and extends for 3 slot pitches; the first out-of-slot end 201 of the third second U-shaped conductor 220 of the second coil group 120 is located on the second layer outside the stator core slot and extends 3 slot pitches in the direction of the second in-slot of the third second U-shaped conductor 220, the second out-of-slot end 201 of the third second U-shaped conductor 220 of the second coil group 120 is located on the third layer outside the stator core slot and extends 3 slot pitches in the direction of the first in-slot of the third second U-shaped conductor 220, the first out-of-slot end 201 of the fourth second U-shaped conductor 220 of the second coil group 120 is located on the second layer outside the stator core slot and extends 3 slot pitches in the direction of the second in-slot of the fourth second layer near the fourth U-shaped conductor 220, the second out-of-slot end 201 of the fourth U-shaped conductor 220 of the second coil group 120 is located on the third layer outside the stator core slot and extends 3 slot pitches in the direction of the first in-slot of the fourth U-shaped conductor 220, and thus the 48 out-of-second U-shaped conductor 220 of the second coil group 120 extends 3 slot ends with the second coil group 120 The two slot inner positions of the second U-shaped conductors 220 are correspondingly arranged.

Illustratively, as shown in fig. 2, 3 and 4, the first coil assembly 110 has a plurality of first U-shaped conductors 210, and the first U-shaped conductors 210 include: two slot interiors 201, the two slot interiors 201 being located in two slots 21 of the stator core at a predetermined slot pitch, the plurality of slot interiors 201 of the plurality of first U-shaped conductors 210 of the first coil group 110 being sequentially located in the stator core slots 21 along the circumferential direction of the stator core 20; two outer slot ends 203, the two outer slot ends 203 are located at one axial end 26 of the stator core 20 and are connected with the two inner slot portions 201, the two outer slot ends 203 extend in the circumferential direction for a specified slot pitch and have the same extension direction, and the plurality of outer slot ends 203 of the plurality of first U-shaped conductors 210 of the first coil group 110 are sequentially located outside the stator core slot 21 along the circumferential direction of the stator core 20;

with reference to fig. 2, 3 and 4, in the present embodiment, the first coil assembly 110 has 24 first U-shaped conductors 210, and the first U-shaped conductors 210 include: the two slot inner parts 201 of the first U-shaped conductor 210 are respectively connected with the two slot inner parts 201 at the two slot inner parts 21 at the specified slot pitch, the two slot inner parts 201 are positioned at the inner layer of the stator iron core slot 21, namely, the one slot inner part 201 is positioned at one layer, the other slot inner part 201 is positioned at one layer, the two slot outer parts 203 are respectively connected with the two slot inner parts 201 at the outer end 26 side of the stator iron core slot at the same layer, the extending directions of the two slot outer ends 203 of the first U-shaped conductor 210 in the circumferential direction of the stator iron core are the same, the two slot inner parts 201 of the 24 first U-shaped conductors 220 of the first coil group 110 are sequentially positioned at the first layer of the 48 slots of the stator iron core along the circumferential direction of the stator iron core 20, the two slot outer ends 203 of the 24 first U-shaped conductors 220 of the first coil group 110 are sequentially positioned at the first layer of the outer diameter of the 48 slots 21 of the stator iron core along the circumferential direction of the stator iron core 20, and the extending directions are all consistent (clockwise direction); specifically, in one embodiment of the present application, the first slot interior of the first U-shaped conductor 210 of the first coil group 110 is located in the first slot of the stator core as the first layer, the second slot interior of the first U-shaped conductor 210 is located in the forty-fourth slot of the stator core as the first layer, the first slot interior of the second U-shaped conductor 210 of the first coil group 110 is located in the second slot of the stator core as the first layer, the second slot interior of the second U-shaped conductor 210 is located in the seventh slot of the stator core as the first layer, the first slot interior of the third U-shaped conductor 210 of the first coil group 110 is located in the third slot of the stator core as the first layer, the second slot interior of the third U-shaped conductor 210 is located in the forty-sixth slot of the stator core as the first layer, the first slot interior of the fourth U-shaped conductor 210 of the first coil group 110 is located in the fourth slot of the stator core as the first layer, the second slot interior of the fourth first U-shaped conductor 210 is located at the first level in the ninth slot of the stator core, the first slot interior of the fifth first U-shaped conductor 210 of the first coil group 110 is located at the first level in the fifth slot of the stator core, the second slot interior of the fifth first U-shaped conductor 210 is located at the first level in the forty-eighth slot of the stator core, the first slot interior of the sixth first U-shaped conductor 210 of the first coil group 130 is located at the first level in the sixth slot of the stator core, the second slot interior of the sixth first U-shaped conductor 210 is located at the first level in the eleventh slot of the stator core, the first slot interior of the seventh first U-shaped conductor 210 of the first coil group 110 is located at the first level in the thirteenth slot of the stator core, the second slot interior of the seventh first U-shaped conductor 210 is located at the first level in the eighth slot of the stator core, the first slot interior of the eighth U-shaped conductor 210 of the first coil group 110 is located at the first level in the fourteenth slot of the stator core, the second slot interior of the eighth first U-shaped conductor 210 is located in the first tier in the nineteenth slot of the stator core, thereby sequentially inserting 24 first U-shaped conductors 210 into the first tier of 48 slots of the stator core;

correspondingly, the first outer slot end 201 of the first U-shaped conductor 210 of the first coil group 110 is located outside the stator core slot and extends 3 slot pitches in the first layer near the second inner slot direction of the first U-shaped conductor 210, the second outer slot end 201 of the first U-shaped conductor 210 of the first coil group 110 is located outside the stator core slot and extends 3 slot pitches in the first layer near the first inner slot direction of the first U-shaped conductor 210, the first outer slot end 201 of the second first U-shaped conductor 210 of the first coil group 110 is located outside the stator core slot and extends 3 slot pitches in the second inner slot direction of the first layer near the first U-shaped conductor 210, the second slot outer end 201 of the second first U-shaped conductor 210 of the first coil group 110 is positioned outside the stator core slot and extends for 3 slot pitches in the first slot inner direction of the first layer close to the second first U-shaped conductor 210; the first out-of-slot end 201 of the third U-shaped conductor 210 of the first coil set 110 is located at the first layer outside the stator core slot and extends 3 slot pitches in the direction of the second in-slot of the third U-shaped conductor 210, the second out-of-slot end 201 of the third U-shaped conductor 210 of the first coil set 110 is located at the first layer outside the stator core slot and extends 3 slot pitches in the direction of the first in-slot of the third U-shaped conductor 210, the first out-of-slot end 201 of the fourth U-shaped conductor 210 of the first coil set 110 is located at the first layer outside the stator core slot and extends 3 slot pitches in the direction of the second in-slot of the fourth U-shaped conductor 210, the second out-of-slot end 201 of the fourth U-shaped conductor 210 of the first coil set 110 is located at the first layer outside the stator core slot and extends 3 slot pitches in the direction of the first in-slot of the first layer near the fourth U-shaped conductor 210, and the 24 out-of-slot ends of the first U-shaped conductor 210 of the first coil set extend 3 slot in turn in the direction of the first in the first U The inner positions of the slots of the conductors are correspondingly positioned outside the axial slots of the stator core, and the first layer extends for a specified slot pitch.

Illustratively, as shown in fig. 2, 3, and 6, the third coil assembly 130 has a plurality of third U-shaped conductors 230, the third U-shaped conductors 230 including: two slot interiors 201, the two slot interiors 201 being located in two slots 201 of the stator core 20 at a predetermined slot pitch, the plurality of slot interiors 201 of the plurality of third U-shaped conductors 230 of the third coil group 130 being sequentially located in the stator core slot 21 in the circumferential direction of the stator core 20; two outer slot ends 203, the two outer slot ends 203 are located at one end 26 of the stator core 20 in the axial direction and are connected with the two inner slot portions 201, and the two outer slot ends 203 extend in the circumferential direction for a specified slot pitch and have the same extending direction; the plurality of outer slot ends 203 of the plurality of third U-shaped conductors 230 of the third coil group 130 are sequentially located outside the stator core slot 21 in the circumferential direction of the stator core 20;

referring to fig. 2, 3 and 4, in the present embodiment, the third coil assembly 130 has 24 third U-shaped conductors 230, and the U-shaped conductors 230 include: the two slot inner parts 201 of the third U-shaped conductor 230 are respectively connected with the two slot inner parts 201 at the two slot inner parts 21 at the side of the outer end 26 of the stator core 20 in the same layer, namely, at four layers, the two slot outer parts 203 are respectively connected with the two slot inner parts 201 at the side of the outer end 26 of the slot of the stator core 20 in the same layer, the extending directions of the two slot outer parts 203 of the third U-shaped conductor 230 in the circumferential direction of the stator core 20 are the same, the two slot inner parts 201 of the 24 third U-shaped conductors 230 of the third coil group 130 are sequentially positioned at the fourth layer in the 48 slots of the stator core along the circumferential direction of the stator core 20, the two slot outer parts 203 of the 24 third U-shaped conductors 230 of the third coil group 130 are sequentially positioned at the outer diameter of the 48 slots 21 of the stator core towards the same layer along the circumferential direction of the stator core 20, and the extending directions are all consistent (anticlockwise direction); specifically, in one embodiment of the present application, the first slot interior of the first third U-shaped conductor 230 of the third coil group 130 is located in the first slot of the stator core for the fourth layer, the second slot interior of the first third U-shaped conductor 230 is located in the forty-third slot of the stator core for the fourth layer, the first slot interior of the second third U-shaped conductor 230 of the third coil group 130 is located in the second slot of the stator core for the fourth layer, the second slot interior of the second third U-shaped conductor 230 is located in the forty-fourth slot of the stator core for the fourth layer, the first slot interior of the third U-shaped conductor 230 of the third coil group 130 is located in the third slot of the stator core for the fourth layer, the second slot interior of the third U-shaped conductor 230 is located in the ninth slot of the stator core for the fourth slot interior of the fourth U-shaped conductor 230 of the third coil group 130 is located in the fourth slot of the stator core for the fourth layer, the second slot interior of the fourth third U-shaped conductor 230 is located at the tenth slot of the stator core and the fourth slot interior of the stator core, the first slot interior of the fifth third U-shaped conductor 230 of the third coil group 130 is located at the fifth slot of the stator core and the fourth slot interior of the stator core, the second slot interior of the fifth third U-shaped conductor 230 is located at the forty-seventh slot of the stator core and the fourth slot interior of the sixth third U-shaped conductor 230 of the third coil group 130 is located at the sixth slot of the stator core and the fourth slot interior of the stator core, the second slot interior of the sixth third U-shaped conductor 230 is located at the forty-eighth slot of the stator core and the fourth slot interior of the seventh third U-shaped conductor 230 of the third coil group 130 is located at the thirteenth slot of the stator core and the fourth slot interior of the seventh third U-shaped conductor 230 is located at the fourteenth slot interior of the stator core, the first slot interior of the eighth third U-shaped conductor 230 of the third coil group 110 is located at the fourteenth slot of the stator core, the second slot interiors of the eighth third U-shaped conductors 230 are positioned a fourth level within the eighth slot of the stator core, thereby sequentially inserting 24 third U-shaped conductors 230 into a fourth level of 48 slots of the stator core; accordingly, the first out-of-slot end 201 of the first third U-shaped conductor 230 of the third coil group 130 is located at the outer fourth layer of the stator core and extends 3 slot pitches in the direction close to the second in-slot portion of the first third U-shaped conductor 230, the second out-of-slot end 201 of the first third U-shaped conductor 230 of the third coil group 130 is located at the outer fourth layer of the stator core and extends 3 slot pitches in the direction close to the first in-slot portion of the first third U-shaped conductor 230, the first out-of-slot end 201 of the second third U-shaped conductor 230 of the third coil group 130 is located at the outer fourth layer of the stator core and extends 3 slot pitches in the direction close to the second in-slot portion of the first third U-shaped conductor 230, the second out-of-slot end 201 of the second third U-shaped conductor 230 of the third coil group 130 is located at the fourth layer outside the stator core slot and extends for 3 slot pitches in the direction close to the first in-slot of the second third U-shaped conductor 230; the first out-of-slot end 201 of the third U-shaped conductor 230 of the third coil group 130 is located on the fourth layer outside the stator core slot and extends 3 slot pitches in the direction close to the second in-slot of the third U-shaped conductor 230, the second out-of-slot end 201 of the third first U-shaped conductor 230 of the third coil group 130 is located on the fourth layer outside the stator core slot and extends 3 slot pitches in the direction close to the first in-slot of the third U-shaped conductor 230, the first out-of-slot end 201 of the fourth third U-shaped conductor 230 of the third coil group 130 is located on the fourth layer outside the stator core slot and extends 3 slot pitches in the direction close to the second in-slot of the fourth U-shaped conductor 230, the second out-of-slot end 201 of the fourth U-shaped conductor 230 of the third coil group 130 is located on the fourth layer outside the stator core slot and extends 3 slot pitches in the direction close to the first in-slot of the fourth U-shaped conductor 230, the outer slot ends of the 24 third U-shaped conductors of the third coil group 130 extend sequentially along the inner slot positions of the corresponding 24 third U-shaped conductors and correspondingly lie outside the axial slot of the stator core and extend for a specified slot pitch along the fourth layer.

Illustratively, the plurality of outer slot ends 203 of the 24 first U-shaped conductors 210 of the first coil group 110 and the plurality of outer slot ends 203 of the 24 third U-shaped conductors 230 of the third coil group 130 extend in the opposite direction in the circumferential direction of the stator core. In this embodiment, the plurality of outer slot ends 203 of the 24 first U-shaped conductors 210 of the first coil group 110 extend in the clockwise direction along the extending direction of the stator core 20 in the circumferential direction, and the plurality of outer slot ends 203 of the 24 third U-shaped conductors 230 of the third coil group 130 extend in the counterclockwise direction along the extending direction of the stator core 20 in the circumferential direction, that is, the plurality of outer slot ends 203 of the 24 first U-shaped conductors 210 of the first coil group 110 are opposite to the plurality of outer slot ends 203 of the 24 third U-shaped conductors 230 of the third coil group 130 in the extending direction of the stator core in the circumferential direction. The U-shaped conductors are few in types and simple in arrangement mode, the use of bus bars and bus bars can be reduced, the inconsistency of the twisting direction and the twisting groove distance of the outer end part of the groove can be eliminated, the branch and neutral points of each phase winding are arranged on any layer of any groove, the complexity of the manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

Illustratively, as shown in fig. 2 and 3, the plurality of slot inner portions 201 of the 24 first U-shaped conductors 210 of the first coil group 110 are located at the same radial layer of the stator core 20, and the plurality of slot outer end portions 203 of the 24 first U-shaped conductors of the first coil group 110 have the same slot pitch extending along the circumferential direction of the stator core 20; and/or the plurality of slot inner parts 201 of the 24 third U-shaped conductors 230 of the third coil group 130 are positioned at the same layer in the radial direction of the stator core, and the plurality of slot outer end parts 203 of the 24 third U-shaped conductors 230 of the third coil group 130 have the same extending slot pitch along the circumferential direction of the stator core;

referring to fig. 2 and 3, in the present embodiment, the slot interiors 201 of the 24 first U-shaped conductors 210 of the first coil group 110 are located at the same radial layer of the stator core 20, i.e., the radially inner first layer, the outer ends 203 of the 24 first U-shaped conductor slots of the first coil group 110 have the same slot pitch extending in the circumferential direction of the stator core 20, i.e., Y/2 slot pitch, (in this embodiment, the slot pitch of Y is 6, the slot pitch of Y is a distance between slots, and the slot pitch of Y is 6, i.e., a distance of 6 slots), i.e., 3 slot pitches, the slot interiors 201 of the 24 third U-shaped conductors 230 of the third coil group 130 are located at the same layer in the radial direction of the stator core 20, i.e., the radially inner fourth layer, the plurality of slot outer end portions 203 of the 24 third U-shaped conductors 230 of the third coil group 130 have the same slot pitch extending in the circumferential direction of the stator core 20, i.e., Y/2 slot pitch, (the slot pitch of Y in this embodiment is 6), i.e., 3 slot pitches; illustratively, as shown in fig. 1 and 4, the 24 first U-shaped conductors 210 of the first coil group 110 further include an out-of-slot turn 202, the out-of-slot turn 202 being located on the other axial out-of-slot side 25 of the stator core 20, and two in-slot portions 201 connecting the 24 first U-shaped conductors 210 of the first coil group 110;

with reference to fig. 1 and 4, the first U-shaped conductor 210 of the first coil group 110 further includes: an out-of-slot turn 202, the out-of-slot turn 202 being located on the axial out-of-slot other end 25 side of the stator core 20, connecting the two in-slot portions 201 of the first U-shaped conductor 220;

as shown in fig. 1 and 5, the second U-shaped conductor 220 of the second coil assembly 120 further includes: an out-of-slot turn 202, said out-of-slot turn 202 located at the stator core axial out-of-slot other end 25, connecting two in-slot portions 201 of the 48 second U-shaped conductors 220 of the second coil assembly 120;

with reference to fig. 1 and 4, the 48 second U-shaped conductors 220 of the second coil group 120 further include: an out-of-slot turn 202, the out-of-slot turn 202 being located on the axial out-of-slot other end 25 side of the stator core 20, connecting the two in-slot portions 201 of the second U-shaped conductor 220;

as shown in fig. 1 and 6, the third U-shaped conductor 230 of the third coil group 130 further includes: an out-of-slot turn 202, said out-of-slot turn 202 located at the core axial out-of-slot other end 25, connecting the two in-slot portions 201 of the 24 third U-shaped conductors 220 of the third coil assembly 130;

referring to fig. 1 and 4, the third U-shaped conductor 230 of the third coil assembly 130 further includes: an out-of-slot turn 202, the out-of-slot turn 202 being located on the axial out-of-slot other end 25 side of the stator core 20, connecting the two in-slot portions 201 of the third U-shaped conductor 230;

for example, as shown in fig. 1 to 42, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110, and/or the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130.

With reference to fig. 1 to 42, the pitch between the two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 may be the same as or different from the pitch between the two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110, that is, the pitch of the out-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 may be different from or the same as the pitch of the out-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110; the pitch between the two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 and the pitch between the two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 may be different from each other, or may be the same as each other, that is, the pitch of the out-slot bent portions 202 of the 48 second U-shaped conductors 220 of the second coil group 120 and the pitch of the out-slot bent portions 203 of the 24 third U-shaped conductors 230 of the third coil group 130 may be different from each other or may be the same as each other.

For example, as shown in fig. 1 to 14, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110, and the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is the same as the pitch of the out-of-slot bends 202 of the 48 third U-shaped conductors 230 of the third coil group 130.

As shown in fig. 1 to 14, the pitch between the two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch between the two slot interiors of the 24 first U-shaped conductors 210 of the first coil 110, and is the same as the pitch between the two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130; that is, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110, but the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is the same as the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130.

Alternatively, as shown in fig. 1 to 14, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is a full pitch, the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is a short pitch, and the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is a full pitch.

As shown in fig. 1 to 7, in the first embodiment, the pitch between two slot interiors of 48 second U-shaped conductors 220 of the second coil group 120 is Y, that is, the pitch of the out-slot bends 202 of 48 second U-shaped conductors 220 of the second coil group 120 is Y, in the present embodiment, Y is 6 equal to the full pitch, the pitch between two slot interiors of 24 first U-shaped conductors 210 of the first coil group 110 is X, that is, the pitch of the out-slot bends 202 of 24 first U-shaped conductors 210 of the first coil group 110 is X, in the present embodiment, X is 5 smaller than the full pitch, and the pitch between two slot interiors of 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, the pitch of the out-slot bends 202 of 24 third U-shaped conductors 230 of the third coil group 130 is Y, in the present embodiment, Y is 6 equal to the full pitch. That is, the out-of-slot turn of the second U-shaped conductor 220 of the second coil assembly 120 is different from the pitch of the out-of-slot turn 202 of the first U-shaped conductor 210 of the first coil 110, and the out-of-slot turn of the second U-shaped conductor 220 of the second coil assembly 120 is the same as the pitch of the out-of-slot turn 202 of the third U-shaped conductor 230 of the third coil assembly 130.

Alternatively, as shown in fig. 8 to 16, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is a full pitch, the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is a long pitch, and the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is a full pitch.

With reference to fig. 8 to 14, in the second embodiment, the pitch between the two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 is Y, that is, the pitch of the out-slot bends 202 of the 48U-shaped conductors 220 of the second coil group 120 is Y, in the present embodiment, Y is 6 equal to the full pitch, the pitch between the two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110 is Z, that is, the pitch of the out-slot bends 202 of the 24U-shaped conductors 210 of the first coil group 110 is Z, in the present embodiment, Z is 7 greater than the full pitch, that is, the long pitch, and the pitch between the two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, in the present embodiment, the pitch of the out-slot bends 202 of the 24U-shaped conductors 230 of the third coil group 130 is Y, and in the present embodiment, Y is 6 equal to the full pitch. That is, the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is different from the pitch of the out-of-slot turn 202 of the first U-shaped conductor 210 of the first coil 110, and the out-of-slot turn of the second U-shaped conductor 220 of the second coil assembly 120 is the same as the pitch of the out-of-slot turn 202 of the third U-shaped conductor 230 of the third coil assembly 130.

For example, as shown in fig. 15 to 21 and 37 to 42, the pitch of the out-of-slot bent portions 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bent portions 202 of the 24 third U-shaped conductors 230 of the third coil group 130, and the pitch of the out-of-slot bent portions 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is the same as the pitch of the out-of-slot bent portions 202 of the 24 first U-shaped conductors 210 of the first coil group 110.

As shown in fig. 15 to 21 and 37 to 42 in combination, the pitch between the inside of two slots of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch between the inside of two slots of the 24 third U-shaped conductors 230 of the third coil 130, and is the same as the pitch between the inside of two slots of the 24 first U-shaped conductors 210 of the first coil group 110; that is, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130, but the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is the same as the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110.

Alternatively, as shown in fig. 15 to 21, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is a short pitch, the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is a short pitch, and the pitch of the out-of-slot bends 202 of the 24 three U-shaped conductors 230 of the third coil group 130 is a full pitch.

With reference to fig. 15 to 21, in the third embodiment, the pitch between two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 is X, that is, the pitch of the out-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is X, in the present embodiment, X is 5 smaller than the full pitch 6, that is, a short pitch, the pitch between two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110 is X, that is, the pitch of the out-slot bends 202 of the 24 first U-shaped conductors of the first coil group 110 is X, in the present embodiment, X is 5 smaller than the full pitch, and the pitch between two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, in the present embodiment, the pitch of the out-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, and in the present embodiment, Y is 6 equal to the full pitch. That is, the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is different from the pitch of the out-of-slot turn 202 of the third U-shaped conductor 230 of the third coil 130, and the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is the same as the pitch of the out-of-slot turn 202 of the first U-shaped conductor 210 of the first coil assembly 110.

Alternatively, as shown in fig. 22 to 28, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is a long pitch, the pitch of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is a long pitch, and the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is a full pitch.

With reference to fig. 22 to 28, in the fourth embodiment, the pitch between two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 is Z, that is, the pitch of the out-slot bends 202 of the 48U-shaped conductors 220 of the second coil group 120 is Z, in the present embodiment, Z is 7 greater than the full pitch, that is, the long pitch, the pitch between two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110 is Z, that is, the pitch of the out-slot bends 202 of the 24U-shaped conductors 210 of the first coil group 110 is Z, in the present embodiment, Z is 7 greater than the full pitch, that is, the long pitch, and the pitch between two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, in the present embodiment, the pitch of the out-slot bends 202 of the 24U-shaped conductors 230 of the third coil group 130 is Y, and Y is 6 equal to the full pitch. That is, the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is different from the pitch of the out-of-slot turn 202 of the third U-shaped conductor 230 of the third coil 130, and the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is the same as the pitch of the out-of-slot turn 202 of the first U-shaped conductor 210 of the first coil assembly 110.

For example, as shown in fig. 29 to 35 and fig. 36 to 42, the pitch of the out-of-slot bent portions 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bent portions 202 of the 24 first U-shaped conductors 210 of the first coil group 110, and the pitch of the out-of-slot bent portions 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch of the out-of-slot bent portions 202 of the 24 third U-shaped conductors 230 of the third coil group 130.

As shown in fig. 29 to 35 and 36 to 42 in combination, the pitch between the two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 is different from the pitch between the two slot interiors of the 24 third U-shaped conductors 230 of the third coil 130 and is also different from the pitch between the two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130; that is, the pitch of the out-of-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil assembly 120 is not the same as the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil assembly 130, nor is it the same as the pitch of the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil assembly 130.

Alternatively, as shown in fig. 29 to 35, the pitch of the out-of-slot bent portions 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is a short pitch, the pitch of the out-of-slot bent portions 202 of the 24 first U-shaped conductors 120 of the first coil group 110 is a long pitch, and the pitch of the out-of-slot bent portions 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is a full pitch.

With reference to fig. 29 to 35, in the fifth embodiment, the pitch between two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 is X, that is, the pitch of the out-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is X, in the present embodiment, X is 5 smaller than the full pitch 6, that is, a short pitch, the pitch between two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110 is Z, that is, the pitch of the out-slot bends 202 of the 24 first U-shaped conductors of the first coil group 110 is Z, in the present embodiment, Z is 7 larger than the full pitch, and the pitch between two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, in the present embodiment, the pitch of the out-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, and in the present embodiment, Y is 6 equal to the full pitch. That is, the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is different from the pitch of the out-of-slot turn 202 of the third U-shaped conductor 230 of the third coil 130, and the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is also different from the pitch of the out-of-slot turn 202 of the first U-shaped conductor 210 of the first coil assembly 110.

Alternatively, as shown in fig. 36 to 42, the pitch of the out-of-slot turns of the second U-shaped conductors of the second coil group is a long pitch, the pitch of the out-of-slot turns of the first U-shaped conductors of the first coil group is a short pitch, and the pitch of the out-of-slot turns of the third U-shaped conductors of the third coil group is a full pitch.

With reference to fig. 36 to 42, in the sixth embodiment, the pitch between two slot interiors of the 48 second U-shaped conductors 220 of the second coil group 120 is Z, that is, the pitch of the out-slot bends 202 of the 48 second U-shaped conductors 220 of the second coil group 120 is Z, in the present embodiment, Z is 7 greater than the full pitch, that is, the long pitch, the pitch between two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110 is X, that is, the pitch of the out-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is X, in the present embodiment, X is 5 smaller than the full pitch, that is, the short pitch, the pitch between two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, the pitch of the out-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, and in the present embodiment, Y is 6 equal to the full pitch. That is, the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is different from the pitch of the out-of-slot turn 202 of the third U-shaped conductor 230 of the third coil 130, and the out-of-slot turn of the second U-shaped conductor of the second coil assembly 120 is also different from the pitch of the out-of-slot turn 202 of the first U-shaped conductor 210 of the first coil assembly 110.

Illustratively, as shown in fig. 21 and 35, the outer slot end 203 of the stator winding 10 has an extension end 4, except the extension end 4 connected to the lead wire, the extension end 4 of the outer slot end 203 of the N-1 layers located radially adjacent to the stator core 20 is connected to the extension end 4 of the outer slot end 203 of the N layers, and the pitch of the two connected outer slot ends 203 extending in the outer circumferential direction of the stator core slot 21 is a short pitch.

Referring to fig. 21 and 35, in the schematic view of sequentially connecting the U-phase stator windings in series in the radial direction of the stator core and then sequentially connecting the U-phase stator windings in series in the circumferential direction of the stator core in series in any of the 3 phases of the stator winding 10, the slot outer end 203 of the stator winding 10 has an extending end 4, except for the extending end 4 connected to the outgoing line (the outgoing line includes a lead end and a neutral point, and the lead end is connected to the neutral point)Is located at The stator core 20 has the same radially adjacent slot outer end 203 extension end 4 of the first layer and the slot outer end 203 of the second layer The two connected slot outer ends 203 are located at a pitch extending in the circumferential direction of the stator core slot 21 Is 5(i.e. the pitch between the first slot inner part of the first slot outer end 203 of the first layer and the second slot inner part of the second slot outer end 203 of the second layer connected with the first slot inner part in the same radial direction is a whole pitch X, in this embodiment, X is 5), and the slot outer end of the third layer adjacent to the stator core 20 in the same radial direction203 extending end 4 is connected with the extending end 4 of the outer end 203 of the slot of the fourth layer, the pitch of the two connected outer end 203 of the slot located at the outer circumference of the stator core slot 21 is 5 (i.e. the pitch between the first slot inside of the first outer end 203 of the slot located at the third layer and the second slot inside of the outer end 203 of the second slot of the fourth layer connected therewith in the same radial direction is the whole pitch X, in this embodiment, X is 5), i.e. the pitch of the two connected (welded) outer end of the stator winding located at the outer 26 end of the stator core extending in the circumferential direction is 5, in this embodiment, the outgoing line and the welded outer end of the slot are both located at one axial end of the stator core, the pitch of the two connected outer ends of the stator winding located at the 26 end extending in the circumferential direction is 5, thereby further reducing the axial height of the stator of the motor and reducing the volume of the, the U-shaped conductors are few in types and simple in arrangement mode, the use of bus bars and bus bars can be reduced, the inconsistency of the twisting direction and the twisting groove distance of the outer end part of the groove can be eliminated, the branch and neutral points of each phase winding are arranged on any layer of any groove, the complexity of the manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

Illustratively, as shown in fig. 7 and 14, the outer slot end 203 of the stator winding 10 has an extension end 4, except the extension end 4 connected to the lead wire, the extension end 4 of the outer slot end 203 of the N-1 layers located adjacent to the same radial direction of the stator core 20 is connected to the extension end 4 of the outer slot end 203 of the N layers, and the pitch of the two connected outer slot ends 203 extending in the outer circumferential direction of the stator core slot 21 is a full pitch.

Referring to fig. 7 and 14, in a schematic view that any one of U-phase stator windings in 3 phases of the stator winding 10 is sequentially connected in series along a radial direction of the stator core and then sequentially connected in series along a circumferential direction of the stator core, an outer end portion 203 of a slot of the stator winding 10 has an extension end 4, except the extension end 4 connected to an outgoing line (the outgoing line includes a lead end and a neutral point, and the lead end is connected to the neutral point),is located at The extending end 4 of the slot outer end 203 of the first layer and the extending end 203 of the slot outer end 203 of the second layer which are adjacent to each other in the same radial direction of the stator core 20 The extending ends 4 are connected, and the outer end parts 203 of the two connected grooves are positionedThe stator core slot 21 has a pitch extending in the outer circumferential direction of 6 (i.e. outside the second groove of the second layer, which is also radially inside the first groove at the outer end 203 of the first groove of the first layer and connected to it The pitch between the second slot interiors of the end portions 203 is the full pitch Y, which is 6 in the present embodiment), is located at the same position as the stator core 20 The extended end 4 of the outer end 203 of the slot of the radially adjacent third layer is connected with the extended end 4 of the outer end 203 of the slot of the fourth layer to be connected The two connected slot outer ends 203 are located at a pitch of 6 (i.e. located in the same radial direction) extending in the outer circumferential direction of the stator core slot 21 The first groove of the first outer slot end 203 of the third layer is connected with the second groove of the second outer slot end 203 of the fourth layer The pitch between the inner portions is a full pitch Y, in this embodiment Y is 6), i.e. the stator winding of the machine is located at the outer 26 end of the stator core The pitch of the outer ends of the two grooves connected (welded) extending in the circumferential direction is 6,leading-out wire and looks welded inslot tip all are located stator core axial one end in this embodiment, and through the kind that uses the U-shaped conductor few, the mode of arranging is simple, can reduce the use of busbar and busbar, can cancel the outer tip distortion direction in groove and distort the groove pitch nonconformity, realizes that the branch road and the neutral point of each phase winding set up in any one deck in arbitrary groove, and then reduce the preparation technology complexity, reduction in production cost improves machining efficiency.

For example, as shown in fig. 28 and 42, the slot outer end portion 203 of the stator winding 10 has an extension end 4, except the extension end 4 connected to the lead wire, the extension end 4 of the slot outer end portion 203 of the N-1 layers located in the same radial direction of the stator core 20 adjacent to each other is connected to the extension end 4 of the slot outer end portion 203 of the N layers, and the pitch of the two connected slot outer end portions 203 extending in the outer circumferential direction of the stator core slot 21 is a long pitch.

Referring to fig. 28 and 42, in a schematic diagram that U-phase stator windings in any one of 3 phases of the stator winding 10 are sequentially connected in series along a radial direction of the stator core and then sequentially connected in series along a circumferential direction of the stator core, the slot outer end portion 203 of the stator winding 10 has an extended end 4, the extended end 4 of the slot outer end portion 203 of the first layer located adjacent to the stator core 20 in the same radial direction is connected to the extended end 4 of the slot outer end portion 203 of the second layer except the extended end 4 connected to the lead wire (where the lead wire includes a lead end and a neutral point, and the lead end and the neutral point are located), a pitch of the two connected slot outer end portions 203 located in an outer circumferential direction of the stator core slot 21 is 7 (that is, a pitch between a first slot inner portion located in the first slot outer end portion 203 of the first layer in the same radial direction and a second slot inner portion located in the second slot outer end portion 203 of the second layer connected, the extending end 4 of the outer end 203 of the slot of the third layer and the extending end 4 of the outer end 203 of the slot of the fourth layer, which are adjacent to each other in the same radial direction of the stator core 20, are connected, and the pitch of the two connected outer ends 203 of the slot, which are located at the outer 26 end of the stator core, extending in the circumferential direction is 7 (that is, the pitch between the first inner portion of the first outer end 203 of the first slot of the third layer and the second inner portion of the outer end 203 of the second slot of the fourth layer, which is connected to the first inner portion of the first outer end 203 of the first slot of the third layer in the same radial direction, is a whole pitch Z, in this embodiment, Z is 7). The U-shaped conductors are few in types and simple in arrangement mode, the use of bus bars and bus bars can be reduced, the inconsistency of the twisting direction and the twisting groove distance of the outer end part of the groove can be eliminated, the branch and neutral points of each phase winding are arranged on any layer of any groove, the complexity of the manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

The embodiment of the utility model provides a still provide a motor, include: rotor and motor stator of any preceding embodiment.

The embodiment of the utility model provides a motor includes the motor stator in above-mentioned embodiment, consequently the embodiment of the utility model provides a motor also possesses the beneficial effect that the above-mentioned embodiment described, no longer gives unnecessary details here.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be mechanically or electrically connected, directly or indirectly through intervening media, or may be interconnected between two elements. The above-described meaning of what is specifically intended in the present invention can be understood in specific instances by those of ordinary skill in the art. Finally, it should be noted that the above description is only a preferred embodiment of the present invention and the technical principles applied.

It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. An electric machine stator comprising:

a stator winding mounted on the stator core,

the method is characterized in that: stator winding is the three-phase, each phase stator winding is followed stator core radially establishes ties in proper order back along stator core circumference series connection in proper order, stator winding includes: the first coil group, the at least one second coil group and the third coil group are sleeved from inside to outside in sequence;

the two slot interiors are positioned in two slots of the stator core which are separated by a specified slot distance, and the plurality of slot interiors of the plurality of third U-shaped conductors of the third coil group are sequentially positioned in stator core slots along the circumferential direction of the stator core;

2. The electric machine stator according to claim 1, wherein the plurality of slot interiors of the plurality of first U-shaped conductors of the first coil group are located at the same layer in a radial direction of the stator core, and the plurality of slot outer ends of the plurality of first U-shaped conductors of the first coil group have the same slot pitch extending in a circumferential direction of the stator core; and/or a plurality of groove inner parts of the plurality of third U-shaped conductors of the third coil group are positioned in the same layer of the stator core in the radial direction, and a plurality of groove outer end parts of the plurality of third U-shaped conductors of the third coil group have the same extending groove distance along the circumferential direction of the stator core.

3. The electric machine stator of claim 2, wherein the first U-shaped conductor of the first coil group further comprises an out-of-slot turn located at the other end of the stator core axial out-of-slot connecting the two in-slot portions of the first U-shaped conductor of the first coil group;

4. The electric machine stator of claim 3, wherein the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is different from the pitch of the out-of-slot turns of the first U-shaped conductor of the first coil assembly, and wherein the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is the same as the pitch of the out-of-slot turns of the third U-shaped conductor of the third coil assembly.

5. The stator according to claim 4, wherein the pitch of the outside-slot turn of the second U-shaped conductor of the second coil group is a full pitch, the pitch of the outside-slot turn of the first U-shaped conductor of the first coil group is a short pitch, and the pitch of the outside-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

6. The stator according to claim 4, wherein the pitch of the outside-slot turn of the second U-shaped conductor of the second coil group is a full pitch, the pitch of the outside-slot turn of the first U-shaped conductor of the first coil group is a long pitch, and the pitch of the outside-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

7. The electric machine stator of claim 3, wherein the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is different from the pitch of the out-of-slot turns of the third U-shaped conductor of the third coil assembly, and wherein the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is the same as the pitch of the out-of-slot turns of the first U-shaped conductor of the first coil assembly.

8. The stator according to claim 7, wherein the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil group is a short pitch, the pitch of the out-of-slot turns of the first U-shaped conductor of the first coil group is a short pitch, and the pitch of the out-of-slot turns of the three U-shaped conductors of the third coil group is a full pitch.

9. The stator according to claim 7, wherein the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is a long pitch, the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group is a long pitch, and the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

10. The electric machine stator of claim 3, wherein the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is different from the pitch of the out-of-slot turns of the first U-shaped conductor of the first coil assembly, and wherein the pitch of the out-of-slot turns of the second U-shaped conductor of the second coil assembly is different from the pitch of the out-of-slot turns of the third U-shaped conductor of the third coil assembly.

11. The stator according to claim 10, wherein the pitch of the out-of-slot turn of the second U-shaped conductor of the second coil group is a short pitch, the pitch of the out-of-slot turn of the first U-shaped conductor of the first coil group is a long pitch, and the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

12. The stator according to claim 10, wherein the pitch of the outside-slot turn of the second U-shaped conductor of the second coil group is a long pitch, the pitch of the outside-slot turn of the first U-shaped conductor of the first coil group is a short pitch, and the pitch of the outside-slot turn of the third U-shaped conductor of the third coil group is a full pitch.

13. A motor stator according to any one of claims 8 or 11, wherein the out-of-slot portions of the stator winding have extended ends, the out-of-slot portions of N-1 layers located radially adjacent to the stator core are connected to the out-of-slot portions of N layers except the extended ends connected to lead wires, and the pitch of the two connected out-of-slot portions extending in the circumferential direction of the slots of the stator core is a short pitch.

14. The motor stator according to any one of claims 5 or 6, wherein the out-of-slot ends of the stator winding have extended ends, the out-of-slot end extended ends of N-1 layers located in the same radial direction of the stator core are connected to the out-of-slot end extended ends of N layers except the extended ends connected to lead wires, and the pitch of the two connected out-of-slot ends extending in the circumferential direction of the slots of the stator core is a full pitch.

15. A motor stator according to any one of claims 9 or 12, wherein the out-of-slot portions of the stator winding have extended ends, the out-of-slot portions of N-1 layers located radially adjacent to the stator core are connected to the out-of-slot portions of N layers except the extended ends connected to lead wires, and the two connected out-of-slot portions are located on the stator core slots at a pitch extending in the circumferential direction at a long pitch.

16. An electric machine, comprising: a rotor and a stator of an electrical machine as claimed in any one of claims 1 to 15.