CN211744159U

CN211744159U - Motor stator and motor

Info

Publication number: CN211744159U
Application number: CN202020310066.1U
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: 2020-10-23
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 looks stator winding radially establishes ties in proper order along stator core 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 adopted U-shaped conductors are few in types, the fact that the twisting direction and the twisting groove distance of the outer end portion of the groove extending from the inner portion of the groove in the same layer of the stator iron core groove in the radial direction are inconsistent can be eliminated, the fact that the lead ends and the neutral points of the windings of each phase are arranged on any layer of any groove in the same radial direction is achieved, the complexity degree of a manufacturing process is reduced, and 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 looks stator winding follows 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 conductor assemblies, the second U-shaped conductor assemblies comprising:

a second large U-shaped conductor comprising:

the two slot interiors are positioned in two slots which are formed in two layers of stator iron cores which are adjacent in the radial direction and are separated by a specified slot distance;

a second small U-shaped conductor, the second large U-shaped conductor comprising:

the two slot interiors are positioned in two slots which are formed in two layers of stator iron cores which are adjacent in the radial direction and are separated by a specified slot distance; two slot interiors of a second large U-shaped conductor in the second U-shaped conductor group surround two slot interiors of a second small U-shaped conductor in the second U-shaped conductor group, and a plurality of slots of a plurality of second U-shaped conductor groups of the second coil group are sequentially positioned in two radially adjacent layers in a stator core slot along the circumferential direction of a stator core;

the second large U-shaped conductor further comprises:

the two outer end parts of the slots are positioned in the two slots of which one axial end of the stator core is connected with the second large U-shaped conductor, and the two outer end parts of the slots are positioned in the circumferential direction of the stator core, extend for a specified slot distance and have opposite and close extension directions;

the second small U-shaped conductor further comprises:

the two outer end parts of the slots are positioned in the two slots of which one axial end of the stator core is connected with the second small U-shaped conductor, and the two outer end parts of the slots are positioned in the circumferential direction of the stator core, extend for a specified slot distance and have opposite and close extension directions; two outer slot ends of a second large U-shaped conductor in the second U-shaped conductor group surround two slot ends of a second small U-shaped conductor in the second U-shaped conductor group, and a plurality of outer slot ends of a plurality of second U-shaped conductor groups of the second coil group are sequentially positioned on two adjacent layers of the stator core slot along the circumferential direction of the stator 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 large U-shaped conductor of the second U-shaped conductor set of the second coil set further comprises: an out-of-slot turn located at another end of the stator core axial out-of-slot, the two in-slot portions connecting the second large U-shaped conductors of the second U-shaped conductor sets of the second coil set, the second small U-shaped conductors of the second U-shaped conductor sets of the second coil set further comprising: 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 small U-shaped conductors of the second plurality of U-shaped conductor sets of the second coil set;

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-groove turning part of the second large U-shaped conductor of the second U-shaped conductor set of the second coil set is a long pitch, and the pitch of the out-of-groove turning part of the second small U-shaped conductor of the second U-shaped conductor set of the second coil set is a short pitch.

Further, the pitch of the out-of-slot turns of the second large U-shaped conductor of the second U-shaped conductor set of the second coil set is different from the pitch of the out-of-slot turns of the first U-shaped conductor of the first coil set, or the pitch of the out-of-slot turns of the second small U-shaped conductor of the second U-shaped conductor set of the second coil set is different from the pitch of the out-of-slot turns of the first U-shaped conductor of the first coil set;

the pitch of the out-of-slot turn of the second large U-shaped conductor of the second U-shaped conductor set of the second coil set is different from the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil set, and the pitch of the out-of-slot turn of the second small U-shaped conductor of the second U-shaped conductor set of the second coil set is different from the pitch of the out-of-slot turn of the third U-shaped conductor of the third coil set.

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

Further, a pitch of the out-of-slot turning portion of the second large U-shaped conductor of the second U-shaped conductor set of the second coil set is 7, a pitch of the out-of-slot turning portion of the second small U-shaped conductor of the second U-shaped conductor set of the second coil set is 5, a pitch of the out-of-slot turning portion of the first U-shaped conductor of the first coil set is 5, and a pitch of the out-of-slot turning portion of the third U-shaped conductor of the third coil set is 6.

Further, a pitch of the out-of-slot turning portion of the second large U-shaped conductor of the second U-shaped conductor set of the second coil set is 7, a pitch of the out-of-slot turning portion of the second small U-shaped conductor of the second U-shaped conductor set of the second coil set is 5, a pitch of the out-of-slot turning portion of the first U-shaped conductor of the first coil set is 7, and a pitch of the out-of-slot turning portion of the third U-shaped conductor of the third coil set is 6.

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.

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 looks 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 conductor assemblies, the second U-shaped conductor assemblies comprising: a second large U-shaped conductor comprising: the two slot interiors are positioned in two slots which are formed in two layers of stator iron cores which are adjacent in the radial direction and are separated by a specified slot distance; a second small U-shaped conductor, the second large U-shaped conductor comprising: the two slot interiors are positioned in two slots which are formed in two layers of stator iron cores which are adjacent in the radial direction and are separated by a specified slot distance; two slot interiors of a second large U-shaped conductor in the second U-shaped conductor group surround two slot interiors of a second small U-shaped conductor in the second U-shaped conductor group, and a plurality of slots of a plurality of second U-shaped conductor groups of the second coil group are sequentially positioned in two radially adjacent layers in a stator core slot along the circumferential direction of a stator core; the second large U-shaped conductor further comprises: the two outer end parts of the slots are positioned in the two slots of which one axial end of the stator core is connected with the second large U-shaped conductor, and the two outer end parts of the slots are positioned in the circumferential direction of the stator core, extend for a specified slot distance and have opposite and close extension directions; the second small U-shaped conductor also comprises two outer slot ends, wherein the two outer slot ends are positioned in the two slots of which one end in the axial direction of the stator core is connected with the second small U-shaped conductor, and the two outer slot ends are positioned in the stator core and extend for a specified slot distance in the circumferential direction, and the extending directions are opposite and close to each other; two outer slot ends of a second large U-shaped conductor in the second U-shaped conductor group surround two slot ends of a second small U-shaped conductor in the second U-shaped conductor group, and a plurality of outer slot ends of a plurality of second U-shaped conductor groups of the second coil group are sequentially positioned on two adjacent layers of the stator core slot along the circumferential direction of the stator 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 U-shaped conductors adopted are few in types and simple in arrangement mode, the use of bus bars and bus bars can be reduced, the fact that the twisting direction of the outer end part of a groove extending towards the inside of the groove on the same layer in the groove of the stator iron core can be cancelled and the twisting groove distance is inconsistent can be eliminated, the lead ends and neutral points between windings of each phase are arranged on any layer of the same radial groove, the complexity of the manufacturing process is further reduced, the production cost is reduced, and the processing efficiency is improved. Therefore, the technical scheme of the application effectively solves the problems of inconsistent twisting direction or twisting groove distance of the outer end part of the groove positioned in the same layer of groove, complex manufacturing process, difficult forming, high production cost and low processing efficiency in the related technology.

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 220A according to an embodiment of the present invention;

fig. 6 is a structural diagram of a second U-shaped conductor 220B according to an embodiment of the present invention;

fig. 7 is a structural diagram of a third U-shaped conductor 230 according to an embodiment of the present invention;

fig. 8 is a plan view of a phase stator winding according to an embodiment of the present invention;

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

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

fig. 11 is a structural diagram of a one-phase stator winding according to a second embodiment of the present invention;

fig. 12 is a structural diagram of a first U-shaped conductor 210 according to a second embodiment of the present invention;

fig. 13 is a structural diagram of a second U-shaped conductor 220A according to a second embodiment of the present invention;

fig. 14 is a structural diagram of a second U-shaped conductor 220B according to a second embodiment of the present invention;

fig. 15 is a structural view of a third U-shaped conductor 230 according to the second embodiment of the present invention;

fig. 16 is a plan view of a one-phase stator winding according to a second 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, and 15, 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 illustrated as examples.

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, a stator winding 10, where the stator winding 10 is installed on the stator core 20, the stator winding 10 is three-phase, and the stator windings 10 of each phase 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;

with reference to fig. 1-3, in the present embodiment, 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, W-phase), and each phase slot of each pole is greater than or equal to 2; 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, and 10 to 11, 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, fig. 2, fig. 10, and fig. 11, in this embodiment, the first coil assembly 110 is located at the radial inner side of the stator core, i.e. close to the radial inner surface direction of the stator core, and one second coil assembly 120 is located at the radial middle of the stator core, the second coil assembly 120 in the middle stator winding 10 of the present invention may have two, three, etc. and is sequentially sleeved radially and adjacently, in this embodiment, the second coil assembly 120 is one, and the third coil assembly 130 is located at the radial outer side of the stator core, i.e. away from the radial inner surface direction of the stator core; 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, 5, 6, 10, 11, 13, 14, the second coil group 120 has 24 second U-shaped conductor groups 220, the second U-shaped conductor groups 220 including: a second large U-shaped conductor 220B, the second large U-shaped conductor 220B comprising: two slot interiors 201, wherein the two slot interiors 201 are positioned in two slots which are two layers of the stator core 20 which are adjacent in the radial direction and are separated by a specified slot distance;

in the present embodiment, referring to fig. 2, 3, 5, 6, 10, 11, 13, and 14, the second coil group 120 has 24 second U-shaped conductor groups 220, and referring to fig. 6 and 14, the second large U-shaped conductor group 220 includes: a second large U-shaped conductor 220B, the second large U-shaped conductor 220B comprising: the stator core comprises an outer slot end 203, an inner slot 201, an outer slot turning part 202, an inner slot 201, an outer slot end 203, two inner slot parts 201 of a second large U-shaped conductor 220B, two middle two layers of the two inner slot parts 201 in the stator core slot 21, namely, the inner slot part 201 is positioned in two layers, and the inner slot part 201 is positioned in three layers;

a second small U-shaped conductor 220A, said second large U-shaped conductor 220B comprising: two slot interiors 201, wherein the two slot interiors 201 are positioned in two slots which are two layers of the stator core 20 which are adjacent in the radial direction and are separated by a specified slot distance;

with reference to fig. 5 and 13, in the present embodiment, the second small U-shaped conductor set 220A includes: the stator core comprises an outer slot end 203, an inner slot 201, an outer slot turning part 202, an inner slot 201, an outer slot end 203, two inner slot parts 201 of a second small U-shaped conductor 220A, two middle two layers of the two inner slot parts 201 in the stator core slot 21, namely, the inner slot part 201 is positioned in two layers, and the inner slot part 201 is positioned in three layers;

the two slot inner portions 201 of the second large U-shaped conductor 220B of the second U-shaped conductor group 220 surround the two slot inner portions 201 of the second small U-shaped conductor 220A of the second

U-shaped conductor group

220, and 4 slots of the 24 second U-shaped conductor groups 220 of the second coil group 120 are sequentially located at two radially adjacent layers in the stator core slot 21 along the circumferential direction of the stator core 20;

referring to fig. 2, 3, 5, 6, 10, 11, 13, 14, in this embodiment, the two slot interiors 201 of the second large U-shaped conductor 220B in the second U-shaped conductor group 220 are located in the first slot and the eighth slot of the stator core slot, the two slot interiors 201 of the second small U-shaped conductor 220A in the second U-shaped conductor group 220 are located in the second slot and the seventh slot of the stator core slot, so that it can be seen that the two slot interiors of the second small U-shaped conductor 220A are located inside the two slots of the second large U-shaped conductor 220B, the first slot interior 201 of the second small U-shaped conductor 220A is located on the side of the first slot interior 201 of the second large U-shaped conductor 220B which is closer to the direction of the second slot interior 201 of the second large U-shaped conductor 220B, the second slot interior 201 of the second small U-shaped conductor 220A is located on the side of the second slot interior 201 of the second large U-shaped conductor 220B which is closer to the direction of the second slot interior 201 of the second large U-shaped conductor 220B, that is, the two slot interiors of the second large U-shaped conductor 220B surround the two slot interiors of the second small U-shaped conductor 220A; the 4 slot interiors of the 24 second U-shaped conductor groups 220 of the second coil group 120 are sequentially located in two radially adjacent layers in the stator core 21 along the circumferential direction of the stator core 20, that is, one slot interior 201 is located in two layers, and the other slot interior 201 is located in three layers; the first second U-shaped group 220 of the second coil group 120 is located in the first slot and the second slot of the second layer of the stator core, the seventh slot and the eighth slot of the third layer of the stator core, the second U-shaped group 220 of the second coil group 120 is located in the third slot and the fourth slot of the second layer of the stator core, the ninth slot and the tenth slot of the fourth layer of the stator core, the third second U-shaped group 220 of the second coil group 120 is located in the fifth slot and the sixth slot of the second layer of the stator core, the eleventh slot and the twelfth slot of the fourth layer of the stator core, the fourth second U-shaped group 220 of the second coil group 120 is located in the seventh slot and the eighth slot of the second layer of the stator core, the thirteenth slot and the fourteenth slot of the fourth layer of the stator core, and is sequentially located in the second layer and the third layer of the 48 slots of the stator core along the circumferential direction of the stator core.

The second large U-shaped conductor 220B further includes: two outer slot ends 203, the two outer slot ends 203 are located at one axial end 26 of the stator core 20 and connected with two inner slot portions 201 of the second large U-shaped conductor 220B, and the two outer slot ends 203 are located at the circumferential direction of the stator core 20, extend for a specified slot distance, and extend in opposite directions and are close to each other;

the two outer ends 203 of the second large U-shaped conductor 220B are respectively connected with the two inner slots 201 positioned at the outer end 26 side of the stator core slot correspondingly on the same layer, the first outer ends 203 of the second large U-shaped conductor 220B are connected with the first inner slots 201 positioned at the second layer of the stator core correspondingly and positioned at the two layers outside the axial slot of the stator core, and the outer ends 203 of the second large U-shaped conductor 220B are connected with the second inner slots 201 positioned at the third layer of the stator core correspondingly and positioned at the third layer outside the axial slot of the stator core; the first slot outer end of the second large U-shaped conductor 220B is located in the circumferential direction of the stator core and extends along the second slot inner direction of the second large U-shaped conductor 220B by a specified slot pitch, and the second slot outer end of the second large U-shaped conductor 220B is located in the circumferential direction of the stator core and extends along the first slot inner direction of the second large U-shaped conductor 220B by a specified slot pitch; in the present embodiment, the extending direction of the outer slot end 203 connected to the inner slot 201 of the second layer in the circumferential direction of the stator core is rightward (counterclockwise), and the extending direction of the outer slot end 203 connected to the inner slot 201 of the third layer in the circumferential direction of the stator core is leftward (clockwise), as shown in fig. 5, the extending directions of the two outer slot ends 203 are opposite and close to each other.

The second small U-shaped conductor also comprises two outer slot ends, wherein the two outer slot ends are positioned in the two slots of which one end in the axial direction of the stator core is connected with the second small U-shaped conductor, and the two outer slot ends are positioned in the stator core and extend for a specified slot distance in the circumferential direction, and the extending directions are opposite and close to each other;

the two outer slot ends 203 of the second small U-shaped conductor 220A are respectively connected with the two inner slot parts 201 positioned at the outer end 26 side of the stator core slot correspondingly on the same layer, the first outer slot end 203 of the second small U-shaped conductor 220A is connected with the first inner slot part 201 positioned at the second layer of the stator core correspondingly and positioned at the second layer outside the axial slot of the stator core, and the second outer slot end 203 of the second small U-shaped conductor 220A is connected with the second inner slot part 201 positioned at the third layer of the stator core correspondingly and positioned at the third layer outside the axial slot of the stator core; the first slot outer end of the second small U-shaped conductor 220A is located in the circumferential direction of the stator core and extends along the second slot inner direction of the second small U-shaped conductor 220A by a specified slot pitch, the second slot outer end of the second small U-shaped conductor 220A is located in the circumferential direction of the stator core and extends along the first slot inner direction of the second small U-shaped conductor 220A by a specified slot pitch (in this embodiment, the extending direction of the slot outer end 203 connected to the slot inner 201 located in the second layer in the circumferential direction of the stator core is rightward (counterclockwise direction), and the extending direction of the slot outer end 203 connected to the slot inner 201 located in the third layer in the circumferential direction of the stator core is leftward (clockwise direction)), as shown in fig. 5, the extending directions of the two slot outer ends 203 are opposite and close to each other;

the two slot outer ends 203 of the second large U-shaped conductor 220B in the second U-shaped conductor group 220 surround the two slot ends 203 of the second small U-shaped conductor 220A in the second U-shaped conductor group 220, and the 4 slot outer ends of the 24 second U-shaped conductor groups 220 of the second coil group 120 are sequentially located at two adjacent layers of the outer diameter of the stator core slot 20 along the circumferential direction of the stator core 20;

with reference to fig. 2, 3, 5, 6, 10, 11, 13, and 14, the first outer ends 203 of the two outer ends 203 of the second large U-shaped conductor 220B of the second U-shaped conductor group 220 are located outside the first slot of the stator core and extend 3 slot pitches in the direction of the second slot interior 201 of the second large U-shaped conductor 220B in the circumferential direction of the stator core close to the first slot interior 201 of the second large U-shaped conductor 220B, the second outer ends 203 of the second large U-shaped conductor 220B are located outside the eighth slot of the stator core and extend 3 slot pitches in the direction of the stator core in the circumferential direction of the stator core close to the first slot interior 201 of the second large U-shaped conductor 220B, the first outer ends 203 of the two outer ends 203 of the second small U-shaped conductor 220A are located outside the second slot of the stator core and extend 3 slot pitches in the direction of the stator core close to the slot interior 201 of the second large U-shaped conductor 220A in the circumferential direction of the stator core, and the second outer ends 203 of the second small U-shaped conductor 220A are located outside the seventh slot of the stator core and close to the first slot interior That the two outer slot ends 203 of the second large U-shaped conductor 220B of the second U-shaped conductor set 220 surround the two outer slot ends 203 of the second small U-shaped conductor 220A of the second U-shaped conductor set 220; the 4 outer slot ends of the 24 second U-shaped conductor sets 220 of the second coil set 120 are in the second and third layers radially adjacent along the outside diameter of the stator core slot 20 along their corresponding slot interiors.

Illustratively, as shown in fig. 2, 3, 4, 10, 11, and 12, the first coil group 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 in a 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 layer 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 layer 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 layer 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 110 is located at the first layer 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 layer 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 layer 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 layer 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 layer 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 24 first in the corresponding first in The inner positions of the slots of the U-shaped 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 fourth twelve slots 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 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 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 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 and the fourth slot interior of the stator core, the first slot interior of the sixth third U-shaped conductor 230 of the third coil group 130 is located at the sixth slot 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 and the fourth slot interior of the stator core, the first slot interior of the seventh third U-shaped conductor 230 of the third coil group 130 is located at the thirteenth slot and the fourth slot interior of the stator core, the second slot interior of the seventh U-shaped conductor 230 of the seventh third U-shaped conductor 230 is located at the seventh slot and the fourth 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 and the fourth layer, 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 of 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 of the first in-slot of the third U-shaped conductor 230, the first 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 of the second in-slot of the fourth layer near 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 of the first in-slot of the fourth layer near the fourth U-shaped conductor 230, and the corresponding outer ends 24 of the 24 third U-shaped conductor 230 of the third coil group 130 sequentially extend 3 slot pitches in this way The inner slot position of the third U-shaped conductor 230 extends a prescribed slot pitch in the fourth layer outside the axial slots of the stator core.

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. 3, 4, 7, 11, 12 and 15, 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;

with reference to fig. 3, 4, 7, 11, 12, and 15, in the first embodiment, the slot interiors 201 of the 24 first U-shaped conductors 210 of the first coil group 110 are located in the same radial layer of the stator core 20, i.e., the radially inner first layer, the slot outer ends 203 of the 24 first U-shaped conductors of the first coil group 110 have the same slot pitch along the circumferential direction of the stator core 20, i.e., Y/2 slot pitch (3 slot pitches), (the slot pitch of Y in the present embodiment is 6, the slot pitch of Y is a slot pitch, and the slot pitch of Y is 6, i.e., a distance of 6 slots) the slot interiors 201 of the 24 third U-shaped conductors 230 of the third coil group 130 are located in the same radial layer of the stator core 20, i.e., the radially inner fourth layer, the plurality of slot outer ends 203 of the 24 third U-shaped conductors 230 of the third coil group 130 have the same slot pitch along the circumferential direction of the stator core 20, i.e., Y/2 slot pitch (3 slot pitches), (the groove pitch of Y in this embodiment is 6);

illustratively, as shown in fig. 4 and 12, 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. 4 and 12, 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 side of the stator core 20 at the other end 25 axially outside the slot, connecting the two in-slot portions 201 of the first U-shaped conductor 220, i.e. the pitch between the two in-slot portions 201 of the first U-shaped conductor 220 is equal to the out-of-slot turn 202 between the two in-slot portions 201 of the first U-shaped conductor 220;

as shown in fig. 3, 4, 7, 11, 12, and 15, the second large U-shaped conductor of the plurality of second U-shaped conductor groups of the second coil group further includes: an out-of-slot turn located at another end of the stator core axial out-of-slot, the two in-slot portions connecting the second large U-shaped conductors of the second U-shaped conductor sets of the second coil set, the second small U-shaped conductors of the second U-shaped conductor sets of the second coil set further comprising: 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 small U-shaped conductors of the second plurality of U-shaped conductor sets of the second coil set;

with reference to fig. 3, 5, 6, 11, 13, and 14, the 24 second U-shaped conductor sets 220 of the second coil set 120, the second large U-shaped conductor 220B of the second U-shaped conductor set 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 second large U-shaped conductor 220B; that is, the pitch between the two slot inner portions 201 of the second large U-shaped conductor 220B is equal to the outer-slot turn 202 connecting the two slot inner portions 201 of the second large U-shaped conductor 220B; the second small U-shaped conductor 220A of the second U-shaped conductor set further includes: an out-of-slot turn 202, the out-of-slot turn 202 being located on the side of the stator core 20 at the axial out-of-slot other end 25, connecting the two in-slot portions 201 of the second small U-shaped conductor 220A; that is, the pitch between the two slot inner portions 201 of the second small U-shaped conductor 220A is equal to the outer-slot turn 202 connecting the two slot inner portions 201 of the second small U-shaped conductor 220A;

as shown in fig. 7 and 15, the 24 third U-shaped conductors 230 of the third coil group 130 further include: 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. 7 and 15, the 24 third U-shaped conductors 230 of the third coil assembly 130 further include: an out-of-slot turn 202, the out-of-slot turn 202 being located on the side of the stator core 20 toward the out-of-slot other end 25, connecting the two in-slot portions 201 of the third U-shaped conductor 230, i.e., the pitch between the two in-slot portions 201 of the third U-shaped conductor 220 is equal to the out-of-slot turn 202 between the two in-slot portions 201 of the third U-shaped conductor 220;

as shown in fig. 5, 6, 13, and 14, the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 has a long pitch, and the second small U-shaped conductor 220A of the 24 second U-shaped conductor groups 220 of the second coil group 120 has a short pitch.

With reference to fig. 5, 6, 13, and 14, the pitch between the two inside grooves of the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is a long pitch, that is, the pitch of the outside-groove bent portion 202 of the second large U-shaped conductor 220B is a long pitch, and the pitch between the two inside grooves of the second large U-shaped conductor 220A of the second large U-shaped conductor group 220 is a short pitch, that is, the pitch of the outside-groove bent portion 202 of the second large U-shaped conductor 220B is a short pitch.

Exemplarily, as shown in fig. 1 to 16, a pitch of the out-of-slot turns 202 of the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is different from a pitch of the out-of-slot turns 202 of the 24 first U-shaped conductors 210 of the first coil group 110, or a pitch of the out-of-slot turns 202 of the second small U-shaped conductor 220A of the 24 second U-shaped conductor groups 220 of the second coil group 120 is different from a pitch of the out-of-slot turns 202 of the 24 first U-shaped conductors 210 of the first coil group 110;

the pitch of the out-of-slot turns 202 of the second large U-shaped conductor 220B of the 24 second U-shaped conductor sets 220 of the second coil set 120 is different from the pitch of the out-of-slot turns 202 of the 24 third U-shaped conductors 230 of the third coil set 130, and the pitch of the out-of-slot turns 202 of the second small U-shaped conductor 220A of the 24 second U-shaped conductor sets 220 of the second coil set 120 is different from the pitch of the out-of-slot turns 202 of the 24 third U-shaped conductors 230 of the third coil set 130.

As shown in fig. 1 to 8, the pitch of the out-of-slot turning part 202 of the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is different from the pitch of the out-of-slot turning part 202 of the 24 first U-shaped conductors 210 of the first coil group 110, or as shown in fig. 9 to 16, the pitch of the out-of-slot turning part 202 of the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is different from the pitch of the out-of-slot turning part 202 of the 24 first U-shaped conductors 210 of the first coil group 110;

as shown in fig. 1 to 8, the pitch of the out-of-slot turns 202 of the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is different from the pitch of the out-of-slot turns 202 of the 24 third U-shaped conductors 230 of the third coil group 130, or, as shown in fig. 9 to 16 in combination, the pitch of the out-of-slot turns 202 of the second small U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is different from the pitch of the out-of-slot turns 202 of the 24 third U-shaped conductors 230 of the third coil group 130;

illustratively, as shown in fig. 1 to 6, the pitch of the out-of-slot turns 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 turns 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is a full pitch.

On the basis of the above, as shown in fig. 4 and 7, in the first embodiment, the pitch between the two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110 is X, in the present embodiment, X is a short pitch, that is, the pitch between the slot interiors of the out-of-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is X, that is, a short pitch, the pitch between the two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, and in the present embodiment, Y is a full pitch, that is, the pitch between the out-of-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, a full pitch.

For example, as shown in fig. 1 to 6, the pitch of the out-of-slot bent portions 202 of the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is 7, the pitch of the out-of-slot bent portions 202 of the second small U-shaped conductor 220A of the 24 second U-shaped conductor groups 220 of the second coil group 120 is 5, the pitch of the out-of-slot bent portions 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is 5, 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 6.

With reference to fig. 1 to 6, in the first embodiment, the pitch between the two inside grooves of the 24 second large U-shaped conductors 220B of the 24 second U-shaped conductor sets 220 of the second coil set 120 is Z, where Z is 7 greater than a full pitch 6 (long pitch), that is, the pitch of the out-groove bends 202 of the 24 second large U-shaped conductors 220B of the 24 second U-shaped conductor sets 220 of the second coil set 120 is Z, where Z is 7 in the present embodiment, the pitch between the two inside grooves of the 24 second small U-shaped conductors 220A of the 24 second U-shaped conductor sets 220 of the second coil set 120 is X, where X is 5 small full pitches 6 (short pitch), that is, the pitch of the out-groove bends 202 of the second small U-shaped conductors 220A of the 24 second U-shaped conductor sets 220 of the second coil set 120 is X, and where X is 5 in the present embodiment; the pitch between the two slot interiors of the 24U-shaped conductors 210 of the first coil group 110 is X, in this embodiment X is 5 smaller than the full pitch 6 (short pitch), i.e., the pitch of the out-slot turns 202 of the 24U-shaped conductors 210 of the first coil group 110 is X, in this embodiment X is 5, the pitch between the two slot interiors of the 24U-shaped conductors 230 of the third coil group 130 is Y, in this embodiment Y is 6 (full pitch), i.e., the pitch of the out-slot turns 202 of the 24U-shaped conductors 230 of the third coil group 130 is Y, and in this embodiment Y is 6 equal to the full pitch.

Alternatively, as shown in fig. 12 and 15, 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.

On the basis of the above, in fig. 12 and 15, in the second embodiment, the pitch between the two slot interiors of the 24 first U-shaped conductors 210 of the first coil group 110 is Y, in the present embodiment, Y is a long pitch, that is, the pitch between the out-slot bends 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is Y, that is, a long pitch, the pitch between the two slot interiors of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, and in the present embodiment, Y is a full pitch, that is, the pitch between the out-slot bends 202 of the 24 third U-shaped conductors 230 of the third coil group 130 is Y, that is, a full pitch.

Alternatively, as shown in fig. 9 to 16, the pitch of the out-of-slot bent portions 202 of the second large U-shaped conductor 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is 7, the pitch of the out-of-slot bent portions 202 of the second small U-shaped conductor 220A of the 24 second U-shaped conductor groups 220 of the second coil group 120 is 5, the pitch of the out-of-slot bent portions 202 of the 24 first U-shaped conductors 210 of the first coil group 110 is 7, 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 6.

With reference to fig. 9 to 16, in the second embodiment, the pitch between the two inside grooves of the 24 second large U-shaped conductors 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is Z, where Z is 7 greater than a full pitch 6 (long pitch) in this embodiment, that is, the pitch of the outside groove bent portions 202 of the 24 second large U-shaped conductors 220B of the 24 second U-shaped conductor groups 220 of the second coil group 120 is Z, where Z is 7 in this embodiment, the pitch between the two inside grooves of the 24 second small U-shaped conductors 220A of the 24 second U-shaped conductor groups 220 of the second coil group 120 is X, where X is 5 small full pitch 6 (short pitch) in this embodiment, that is, the pitch of the outside groove bent portions 202 of the 24 second small U-shaped conductors 220A of the 24 second U-shaped conductor groups 220 of the second coil group 120 is X, and where X is 5 in this embodiment; the pitch between the two slot interiors of the 24U-shaped conductors 210 of the first coil group 110 is Z, which in this embodiment is 5 greater than the full pitch 6 (long pitch), i.e., the pitch of the out-of-slot turns 202 of the 24U-shaped conductors 210 of the first coil group 110 is Z, which in this embodiment is 7, the pitch between the two slot interiors of the 24U-shaped conductors 230 of the third coil group 130 is Y, which in this embodiment is 6 (full pitch), i.e., the pitch of the out-of-slot turns 202 of the 24U-shaped conductors 230 of the third coil group 130 is Y, which in this embodiment is 6 equal to the full pitch.

Illustratively, as shown in fig. 8 and 16, 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 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. 8 and 16, in a schematic diagram of the U-phase stator windings in any one of the 3 phases of the stator winding 10 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, in the first and second embodiments, the outer slot end 203 of the stator winding 10 has an extension end 4, except the extension end 4 connected to the lead-out wire (the lead-out wire includes a lead end and a neutral point, and the lead end is connected to the neutral point), the extension end 4 of the outer slot end 203 of the first layer located in the same radial direction of the stator core 20 is connected to the extension end 4 of the outer slot end 203 of the second layer, the two connected outer slot ends 203 are located in the stator core slot 21 and extend in the circumferential direction by a pitch of 6 (i.e. the pitch between the first slot inside of the first outer slot end 203 of the first layer and the second slot inside 203 of the second layer connected thereto is a whole pitch Y, y is 6 in the present embodiment), correspondingly, the pitch of extension of any first slot outer end portion in the same radial direction in the first layer and any second slot outer end portion in the second layer in the circumferential direction is 6, the slot outer end portion 203 extension end 4 of the third layer adjacent to the same radial direction of the stator core 20 is connected with the slot outer end portion 203 extension end 4 of the fourth layer, the pitch of extension of the two connected slot outer end portions 203 in the outer circumferential direction of the stator core slot 21 is 6 (i.e. the pitch between the first slot inner portion of the first slot outer end portion 203 of the third layer and the second slot inner portion of the second slot outer end portion 203 of the fourth layer connected therewith is the whole pitch Y, Y is 6 in the present embodiment), correspondingly, the pitch of extension of any first slot outer end portion in the same radial direction in the third layer and any second slot outer end portion in the fourth layer in the circumferential direction is 6, namely, the motor stator winding is located at the outer end 26 of the stator core, and the outer end parts of two connected (phase welded) slots extend in the circumferential direction by the pitch of 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.

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 looks stator winding follows 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;

a second large U-shaped conductor comprising:

the second large U-shaped conductor further comprises:

the second small U-shaped conductor further comprises:

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 motor stator of claim 3 wherein the pitch of the out-of-slot turns of the second larger U-shaped conductor of the second group of U-shaped conductors of the second group of coils is different from the pitch of the out-of-slot turns of the first U-shaped conductor of the first group of coils, or the pitch of the out-of-slot turns of the second smaller U-shaped conductor of the second group of U-shaped conductors of the second group of coils is different from the pitch of the out-of-slot turns of the first U-shaped conductor of the first group of coils;

5. The stator of claim 4 wherein 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 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 out-of-slot turns of said first U-shaped conductor of said first coil group is a long pitch, and the pitch of the out-of-slot turns of a plurality of said third U-shaped conductors of said third coil group is a full pitch.

7. The stator according to claim 5, wherein the pitch of the outside-slot turn of the second large U-shaped conductor of the second U-shaped conductor set of the second coil set is 7, the pitch of the outside-slot turn of the second small U-shaped conductor of the second U-shaped conductor set of the second coil set is 5, the pitch of the outside-slot turn of the first U-shaped conductor of the first coil set is 5, and the pitch of the outside-slot turn of the third U-shaped conductor of the third coil set is 6.

8. The stator according to claim 6, wherein the pitch of the outside-slot turn of the second large U-shaped conductor of the second U-shaped conductor set of the second coil set is 7, the pitch of the outside-slot turn of the second small U-shaped conductor of the second U-shaped conductor set of the second coil set is 5, the pitch of the outside-slot turn of the first U-shaped conductor of the first coil set is 7, and the pitch of the outside-slot turn of the third U-shaped conductor of the third coil set is 6.

9. A motor stator according to any one of claims 5, 6, 7 and 8, wherein the out-of-slot ends of the stator winding have extended ends, the out-of-slot ends of N-1 layers which are positioned in the same radial direction of the stator core are connected with the out-of-slot ends of N layers except the extended ends connected with lead wires, and the pitch of the two connected out-of-slot ends extending in the circumferential direction of the stator core slots is a full pitch.

10. An electric machine, comprising: a rotor and a stator of an electrical machine as claimed in any one of claims 1 to 9.