CN215772693U

CN215772693U - Motor stator and motor

Info

Publication number: CN215772693U
Application number: CN202121671970.6U
Authority: CN
Inventors: 刘阳
Original assignee: Tianjin Songzheng Auto Parts Co ltd
Current assignee: Borgwarner Powertrain Tianjin Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-02-08
Anticipated expiration: 2031-07-22

Abstract

The utility model provides a motor stator and a motor, wherein each phase winding comprises K parallel branch windings, and the K parallel branch windings comprise: the coil units are positioned at the first axial end of the stator core, each coil unit comprises 3 conductors, and the first connecting part is positioned on the 4M/2+1 layer and the 4M/2+2 layer in the radial direction of the stator core; the second connecting part is positioned on the other layers except the 4M/2+1 layer and the 4M/2+2 layer; the pitch of at least 2 conductors in the third coil unit of the phase winding is larger than the pitch of the first connection part of the phase winding, or the pitch of at least 2 conductors in the third coil unit of the phase winding is smaller than the pitch of the first connection part of the phase winding; by adopting the structure, the number of the contact of the windings of different phases in the same slot is 2, so that the contact area between two phases in the slot is reduced, the reliability of the windings in the slot is improved, and the service life of the motor is prolonged.

Description

Motor stator and motor

Technical Field

The utility model relates to the field of motors, in particular to a motor stator and a motor.

Background

In the prior art, the stator winding is a multi-phase winding, as shown in fig. 17, two adjacent conductors in the same slot are different-phase windings, the number of the different-phase windings in the slot is-1, and the contact area between two phases in the slot is increased, so that the inter-phase short circuit condition is easy to occur, the reliability of the windings in the slot is reduced, and the service life of the motor is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and a motor, which reduce the contact area between two phases in a slot, improve the reliability of a winding in the slot and prolong the service life of the motor.

In order to achieve the above object, according to one aspect of the present invention, there is provided a stator of an electric motor, comprising:

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

the stator winding comprises a plurality of phase windings arranged on a stator core, and the number of slots of each pole and each phase of the stator winding is 3;

the method is characterized in that: the multiple phase windings form 4M +2 layers in the radial direction of the stator core, wherein M is an integer greater than or equal to 1;

each phase winding includes K parallel branch windings, and K parallel branch windings include:

the coil units are positioned at the first axial end of the stator core, each coil unit comprises 3 conductors, the coil units are provided with K first coil units, K second coil units and a plurality of third coil units, the first coil units are positioned on the first radial layer of the stator core, the second coil units are positioned on the 4M +2 radial layer of the stator core, the third coil units are positioned on the 4M/2+1 radial layer and the 4M/2+2 radial layer of the stator core, and K is an integer greater than or equal to 1;

the connecting parts are positioned at the axial second end of the stator core, each connecting part is formed by connecting one welding end of one conductor with one welding end of the other conductor, the connecting parts are provided with a plurality of first connecting parts and a plurality of second connecting parts, and the first connecting parts are positioned on the radial 4M/2+1 layer and 4M/2+2 layer of the stator core; the second connecting part is positioned on the other layers except the 4M/2+1 layer and the 4M/2+2 layer;

the pitch of at least 2 conductors in the third coil unit of the phase winding is larger than the pitch of the first connection portion of the phase winding, or the pitch of at least 2 conductors in the third coil unit of the phase winding is smaller than the pitch of the first connection portion of the phase winding.

Further, the pitch of the 3 conductors in the third coil unit of the phase winding is a long pitch, the pitch of the first connection portion in the phase winding is a short pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

Further, the pitch of the 3 conductors in the third coil unit of the phase winding is a short pitch, the pitch of the first connection portion in the phase winding is a long pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

Further, the pitch of 2 conductors of the 3 conductors in the third coil unit of the phase winding is a long pitch and the pitch of 1 conductor is a short pitch, the pitch of the first connection portion in the phase winding is a short pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

Further, the pitch of 1 of the 3 conductors in the third coil unit of the phase winding is a long pitch and the pitch of 2 conductors is a full pitch, the pitch of the first connection portion in the phase winding is a short pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

Further, the pitch of 2 conductors of the 3 conductors in the third coil unit of the phase winding is a full pitch and the pitch of 1 conductor is a short pitch, the pitch of the first connection portion in the phase winding is a long pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

Further, the pitch of 1 of the 3 conductors in the third coil unit of the phase winding is a long pitch and the pitch of 2 conductors is a short pitch, the pitch of the first connection portion in the phase winding is a long pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

Further, the pitch of 1 conductor in the 3 conductors of the first coil unit is a long pitch and the pitch of 2 conductors is a short pitch, and the pitch of 3 conductors of the second coil unit is a full pitch;

or the pitch of 2 conductors in the 3 conductors of the first coil unit is long pitch, the pitch of 1 conductor is short pitch, and the pitch of 3 conductors of the second coil unit is full pitch.

Furthermore, the plurality of coil units of each phase winding further include a plurality of fourth coil units and a plurality of fifth coil units, the fourth coil units are located on two sides of the third coil units in the same radial direction, part of the fifth coil units are located in the same radial direction of the first coil units, and the other part of the fifth coil units are located in the same radial direction of the second coil units.

Further, the pitch of the 3 conductors of the fourth coil unit is a full pitch, and/or the pitch of 2 conductors of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 1 conductor is a short pitch, and/or the pitch of 1 conductor of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 2 conductors is a short pitch;

the pitch of the 3 conductors of the fifth coil unit is a full pitch, and/or the pitch of 2 conductors in the 3 conductors of the fifth coil unit is a long pitch and the pitch of 1 conductor is a short pitch; and/or the pitch of 1 conductor in the 3 conductors of the fifth coil unit is a long pitch and the pitch of 2 conductors is a short pitch.

Furthermore, the outgoing line of each phase winding is positioned at one end of the second axial connecting part of the stator core; or the leading-out wire of each phase winding is positioned at one end of the first axial connecting part of the stator core.

According to another aspect of the present invention, there is provided an electric machine comprising the electric machine stator described above.

The technical scheme of the utility model is applied, the stator of the motor and the motor comprise a stator core, wherein the stator core is provided with a plurality of core slots, and the core slots are formed on the radial inner surface of the stator core and are spaced at preset slot pitches along the circumferential direction of the stator core; the stator winding comprises a plurality of phase windings arranged on a stator core, and the number of slots of each pole and each phase of the stator winding is 3; the method is characterized in that: the multiple phase windings form 4M +2 layers in the radial direction of the stator core, wherein M is an integer greater than or equal to 1; each phase winding includes K parallel branch windings, and K parallel branch windings include: the coil units are positioned at the first axial end of the stator core, each coil unit comprises 3 conductors, the coil units are provided with K first coil units, K second coil units and a plurality of third coil units, the first coil units are positioned on the first radial layer of the stator core, the second coil units are positioned on the 4M +2 radial layer of the stator core, the third coil units are positioned on the 4M/2+1 radial layer and the 4M/2+2 radial layer of the stator core, and K is an integer greater than or equal to 1; the connecting parts are positioned at the axial second end of the stator core, each connecting part is formed by connecting one welding end of one conductor with one welding end of the other conductor, the connecting parts are provided with a plurality of first connecting parts and a plurality of second connecting parts, and the first connecting parts are positioned on the radial 4M/2+1 layer and 4M/2+2 layer of the stator core; the second connecting part is positioned on the other layers except the 4M/2+1 layer and the 4M/2+2 layer; the pitch of at least 2 conductors in the third coil unit of the phase winding is larger than the pitch of the first connection portion of the phase winding, or the pitch of at least 2 conductors in the third coil unit of the phase winding is smaller than the pitch of the first connection portion of the phase winding. By adopting the third coil unit positioned on the 4M/2+1 th layer and the 4M/2+2 th layer of the stator core in the radial direction and the different pitches of the first connecting part positioned on the 4M/2+1 th layer and the 4M/2+2 th layer of the stator core in the radial direction, the number of the different-phase windings in the same slot is 2, so that the contact area between the two phases in the slot is reduced, the reliability of the windings in the slot is improved, and the service life of the motor is prolonged.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural view of a stator of a motor in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a structure of one phase winding of the stator winding in an embodiment of the present invention;

FIG. 3 is a schematic plan view of a phase winding in accordance with an embodiment of the present invention;

FIG. 4 is a schematic plane development of a phase winding according to a second embodiment of the present invention;

FIG. 5 is a schematic plane development of a phase winding in a third embodiment of the present invention;

FIG. 6 is a schematic plane development of a phase winding in a fourth embodiment of the present invention;

FIG. 7 is a schematic plan view of a phase winding in a fifth embodiment of the present invention;

FIG. 8 is a schematic plan view of a phase winding in a sixth embodiment of the present invention;

FIG. 9 is a schematic plane development of a phase winding in a seventh embodiment of the present invention;

fig. 10 is a schematic plan view of a phase winding in an eighth embodiment of the present invention;

fig. 11 is a schematic plan view of a phase winding in accordance with a ninth embodiment of the utility model;

FIG. 12 is a schematic plan view of a phase winding in a tenth embodiment of the utility model;

fig. 13 is a schematic diagram of a structure of one coil unit of a phase winding in an embodiment of the present invention; fig. 14 is a schematic view of the structure of another coil unit of the phase winding in the embodiment of the utility model; fig. 15 is a schematic structural view of still another coil unit of a phase winding in the embodiment of the present invention; fig. 16 is a phase conductor pattern in a partial stator winding slot in accordance with an embodiment of the present invention;

fig. 17 is a prior art phase winding layout for a partial stator winding slot of the present invention;

FIG. 18 is a schematic plan view of a phase winding in an eleventh embodiment of the present invention;

FIG. 19 is a schematic plan view of a phase winding in accordance with a twelfth embodiment of the present invention;

fig. 20 is a schematic plan view showing the development of a phase winding in the thirteenth embodiment of the utility model;

FIG. 21 is a schematic view of an insulation paper structure in a slot of a stator of a first motor according to an embodiment of the present invention;

FIG. 22 is a schematic view of the structure of the insulation paper in the slots of the stator of the second motor in the embodiment of the utility model;

FIG. 23 is a schematic view of an insulation paper structure in a stator slot of a third motor according to an 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 utility model and are not limiting of the utility model. 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 used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.

The utility model provides a motor stator. In the application, the pitch is the interval between the two groove interiors of the same U conductor along the circumferential direction, or the pitch is the sum of the span between the groove interiors corresponding to one welding end of one U conductor and the span between the groove interiors corresponding to one welding end of the other U conductor; it should be noted that, in this application, the first radial layer of the stator core is the first layer close to one side of the central axis direction of the stator core, and may also be the first layer away from one side of the central axis direction of the stator core.

Exemplarily, as shown in fig. 1, in an embodiment, there is provided a motor stator including a stator core 20, the stator core 20 having a plurality of core slots 21, the plurality of core slots 21 being formed on a radially inner surface of the stator core 20 and being spaced apart at a predetermined slot pitch in a circumferential direction of the stator core 20.

Illustratively, as shown in fig. 1 to 19, the stator winding 10 includes a plurality of phase windings mounted on a stator core 20, the plurality of phase windings form 6 layers in a radial direction of the stator core 20 when M is 1, the plurality of phase windings form 10 layers in the radial direction of the stator core 20 when M is 2, and M is an integer of 1 or more.

Referring to fig. 1 to 19, a stator winding 10 including a plurality of phase windings mounted on a stator core 20 so as to be different from each other in electrical phase and form 4M +2 layers in a radial direction of the stator core 20, referring to fig. 1 to 12, in an embodiment one to ten, the phase windings (U-phase winding or V-phase winding or W-phase winding) form 6 layers in the radial direction of the stator core; the stator winding 10 is a three-phase (i.e., U-phase winding, V-phase winding, W-phase winding) winding, and each phase slot of each pole is equal to or equal to 3; each pole of the rotor, which has six poles and is so provided for each phase of the three-phase stator winding 10, is provided with 9 slots 21, and the number of slots 21 provided in the stator core 20 is equal to 54 (i.e., 3X6X3), and in the twelfth embodiment, in conjunction with fig. 19, the phase winding (U-phase winding or V-phase winding or W-phase winding) forms 10 layers in the stator core radial direction; in embodiments eleventh to twelfth, the stator winding 10 is a three-phase (i.e., U-phase winding, V-phase winding, W-phase winding) winding, and each pole has 3 or more slots per phase; each pole of the rotor is provided with 9 slots 21, the rotor has twelve poles and is such that for each phase of the three-phase stator winding 10, the number of slots 21 provided in the stator core 20 is equal to 108 (i.e., 3X12X3), and further, in the present embodiment, the stator core 20 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 at both end surfaces in the axial direction of the stator core, and other conventional metal plates may be used instead of the magnetic steel plates. Fig. 21 shows that the first type of in-slot insulating paper 30 in this embodiment is B-shaped insulating paper, fig. 22 shows that the second type of in-slot insulating paper 30 in this embodiment is double-mouth insulating paper, fig. 23 shows that the third type of in-slot insulating paper 30 in this embodiment is S-shaped insulating paper, and in this embodiment, any one of the three types of in-slot insulating paper may be selected to isolate the inter-phase conductors in the slots 21.

Illustratively, as shown in fig. 3 to 16, in the first to tenth embodiments, each phase winding includes 2 parallel branch windings, and the 2 parallel branch windings include: a plurality of coil units located at the first axial end 26 of the stator core, each coil unit includes 3 conductors, the 3 conductors of each coil unit are located in 3 circumferentially adjacent slots of the stator core, the plurality of coil units include 2 first coil units 100, 2 second coil units 200 and 2 third coil units 300, the first coil unit 100 is located at the first radial layer of the stator core, the second coil unit 200 is located at the 6 th radial layer of the stator core, and the third coil units 300 are located at the 3 rd and 4 th radial layers of the stator core, in this embodiment, K is 2, and M is 1; as shown in fig. 18, in the eleventh embodiment, each phase winding includes 3 parallel branch windings, and the 3 parallel branch windings include: a plurality of coil units located at the first axial end 26 of the stator core, the plurality of coil units having 3 first coil units 100, 3 second coil units 200 and a plurality of third coil units 300, K being 2 and M being 1 in this embodiment, a plurality of connection portions located at the second axial end 25 of the stator core, each connection portion being a connection portion where one welding end 303 of one conductor is connected to one welding end 303 of another conductor, the plurality of connection portions having a plurality of first connection portions 2000 and a plurality of second connection portions 1000, the first connection portions 2000 being located at the 3 rd and 4 th radial layers of the stator core; the second connection part 1000 is located at the remaining layers (1 st, 2 nd, 5 th, 6 th layers) except the 3 rd and 4 th layers; as shown in fig. 19, in the twelfth embodiment, each phase winding includes 4 parallel-branch windings, and the 4 parallel-branch windings include: the plurality of coil units are positioned at the first axial end 26 of the stator core, each coil unit comprises 4 first coil units 100, 4 second coil units 200 and a plurality of third coil units 300, the first coil unit 100 is positioned at the first radial layer of the stator core, the second coil unit 200 is positioned at the 10 th radial layer of the stator core, and the third coil units 300 are positioned at the 5 th and 6 th radial layers of the stator core, wherein in the embodiment, K is 4, and M is 2; as shown in fig. 20, in the thirteenth embodiment, each phase winding includes 1 parallel-branch winding (i.e., series-branch winding), and the 1 parallel-branch winding (series-branch winding) includes: the plurality of coil units are positioned at the first axial end 26 of the stator core, each coil unit comprises 1 first coil unit 100, 1 second coil unit 200 and a plurality of third coil units 300, the first coil unit 100 is positioned at the first radial layer of the stator core, the second coil unit 200 is positioned at the 4 th radial layer of the stator core, the third coil units 300 are positioned at the 2 nd and 3 rd radial layers of the stator core, and K is 1 and M is 4 in the embodiment; correspondingly, when K equals 6, every phase winding includes 6 parallel branch winding, and a plurality of coil unit that corresponds have 6 first coil unit 100 and 6 second coil unit 200, therefore, in this application, can change series connection branch winding and parallel branch winding in the phase winding through the number of adjustment first coil unit and second coil unit, need not to increase more hairpin kinds and can realize.

A plurality of connecting portions at the second axial end 25 of the stator core, each connecting portion being a welding end 303 of one conductor connected to a welding end 303 of another conductor, the plurality of connecting portions having a plurality of first connecting portions 2000 and a plurality of second connecting portions 1000, the first connecting portions 2000 being located at the radial 5 th and 6 th layers of the stator core; the second connection part 1000 is located on the remaining layers (1 st and 2 nd, 3 rd and 4 th, 7 th and 8 th, and 9 th and 10 th) except the 5 th and 6 th layers; the pitch of at least 2 of the 3 conductors of the third coil unit 300 of each phase winding is greater than the pitch of the first connection 2000 of that phase winding, or the pitch of at least 2 of the 3 conductors of the third coil unit 300 of each phase winding is less than the pitch of the first connection 2000 of that phase winding. By adopting the third coil unit positioned on the 4M/2+1 th layer and the 4M/2+2 th layer in the radial direction of the stator core and the different pitches of the first connecting part positioned on the 4M/2+1 th layer and the 4M/2+2 th layer in the radial direction of the stator core, and combining the graph 16, the number of the contact roots of the windings in different phases in the same slot is 2, so that the contact area between the two phases in the slot is reduced, the reliability of the windings in the slot is improved, and the service life of the motor is prolonged.

Exemplarily, as shown in fig. 3, 9, 10, 11, 18, and 19, in the first, seventh to ninth embodiments, eleventh, and twelfth embodiments, the pitch of the three conductors in the third coil unit 300 of each phase winding is a long pitch, the pitch of the first connection portion 2000 in the phase winding is a short pitch, and the pitch of the second connection portion 1000 in the phase winding is a full pitch.

With reference to fig. 3, 9, 10, 11, 18, and 19, in the first embodiment, seventh embodiment to ninth embodiment, eleventh embodiment, and twelfth embodiment, specifically, each phase winding includes 2 third coil units 300, a first conductor of the first third coil unit 300 is located in the third slot 19 and the fourth slot 29 of the radial direction of the stator core, a second conductor of the first third coil unit 300 is located in the third slot 20 and the fourth slot 30 of the radial direction of the stator core, a third conductor of the first third coil unit 300 is located in the 21 st slot 21 and the fourth slot 31 of the radial direction of the stator core, a first conductor of the second third coil unit 300 is located in the third slot 46 and the fourth slot 2 of the radial direction of the stator core, a second conductor of the second third coil unit 300 is located in the third slot 47 of the radial direction of the stator core, and the fourth slot 3 of the radial direction of the stator core, the third conductor of the second third coil unit 300 is located in the radial 3 rd layer 48 th slot and 4 th layer 4 th slot of the stator core, that is, each conductor in the third coil unit 300 of each phase winding is located in the radial 3 rd layer and 4 th layer of the stator core, and the pitch of each conductor in the third coil unit 300 is long pitch 10; the phase winding comprises 17 first connecting parts 2000, wherein the first connecting part 2000 is connected with a welding end corresponding to the inside of a groove in a 2 nd groove positioned on a radial 4 th layer of a stator core in a conductor and a welding end corresponding to the inside of a groove in a 10 th groove positioned on a radial 3 rd layer of the stator core in another conductor, the second first connecting part 2000 is connected with a welding end corresponding to the inside of a groove in a 3 rd groove positioned on a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a groove in a 11 th groove positioned on a radial 3 rd layer of the stator core in a conductor, the third first connecting part 2000 is connected with a welding end corresponding to the inside of a groove in a 4 th groove positioned on a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a groove in a 12 th groove positioned on a radial 3 rd layer of the stator core in another conductor, and the fourth first connecting part 2000 is connected with a welding end corresponding to the inside of a groove in a 11 th groove positioned on a radial 4 th layer of the stator core in a fourth conductor and a fixed position in another conductor The welding end corresponding to the inside of a slot in the 19 th slot of the radial 3 rd layer of the stator core is connected with the welding end corresponding to the inside of a slot in the 12 th slot of the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of a slot in the 20 th slot of the radial 3 rd layer of the stator core in another conductor, the sixth first connecting part 2000 is connected with the welding end corresponding to the inside of a slot in the 20 th slot of the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of a slot in the 28 th slot of the radial 3 rd layer of the stator core in another conductor, the seventh first connecting part 2000 is connected with the welding end corresponding to the inside of a slot in the 21 st slot of the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of a slot in the 29 th slot of the radial 3 rd layer of the stator core in another conductor, and the eighth first connecting part 2000 is connected with the welding end corresponding to the inside of a slot in the 22 th slot of the radial 4 th layer of the stator core in one conductor The end of the welding end corresponds to the inside of the slot of the other conductor positioned in the 30 th slot of the radial 3 rd layer of the stator core, the ninth first connecting part 2000 connects the welding end corresponding to the inside of the slot of the conductor positioned in the 29 th slot of the radial 4 th layer of the stator core and the welding end corresponding to the inside of the slot of the other conductor positioned in the 37 th slot of the radial 3 rd layer of the stator core, the tenth first connecting part 2000 connects the welding end corresponding to the inside of the slot of the conductor positioned in the 30 th slot of the radial 4 th layer of the stator core and the welding end corresponding to the inside of the slot of the other conductor positioned in the 38 th slot of the radial 3 rd layer of the stator core, the eleventh first connecting part 2000 connects the welding end corresponding to the inside of the slot of the first conductor positioned in the 31 th slot of the radial 4 th layer of the stator core and the welding end corresponding to the inside of the slot of the other conductor positioned in the 39 th slot of the radial 3 rd layer of the stator core, a twelfth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 46 th slot of the radial 3 rd layer of the stator core in another conductor, a thirteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 39 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 3 rd layer of the stator core in another conductor, a fourteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 40 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 48 th slot of the radial 3 rd layer of the stator core in another conductor, and a fifteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 4 th layer of the stator core in the conductor with a welding end of another conductor located in the radial 3 rd layer of the stator core in the radial direction The welding end corresponding to the inside of the slot of the 1 st slot, the sixteenth first connecting part 2000 is connected with the welding end corresponding to the inside of the slot of the 48 th slot positioned on the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of the slot of the 2 nd slot positioned on the radial 3 rd layer of the stator core in another conductor, and the seventeenth first connecting part 2000 is connected with the welding end corresponding to the inside of the slot of the 49 th slot positioned on the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of the slot of the 3 rd slot positioned on the radial 3 rd layer of the stator core in another conductor; that is, the pitch of the second connection portion 1000 in the phase winding is the short pitch 8; the phase winding comprises 35 second connecting portions 1000, a first second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 2 nd slot of a radial 6 th layer of a stator core in a conductor with a welding end corresponding to the inside of a slot located in a 11 th slot of a radial 5 th layer of the stator core in another conductor, a second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 3 rd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot located in a 12 th slot of the radial 5 th layer of the stator core in another conductor, a third second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 4 th slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot located in a 13 th slot of the radial 5 th layer of the stator core in another conductor, and a fourth second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in the 11 th slot of the radial 6 th layer of the stator core in a conductor with a welding end of the other conductor A welding end corresponding to the inside of a slot in a 20 th slot of a radial 5 th layer of the stator core, a fifth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 12 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 21 st slot of the radial 5 th layer of the stator core in another conductor, a sixth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 20 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 5 th layer of the stator core in another conductor, a seventh second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 21 st slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 30 th slot of a radial 5 th layer of the stator core in another conductor, and an eighth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 22 th slot in a radial 6 th layer of the stator core in one conductor The welding end corresponds to the welding end in the slot inside of the 31 st slot of the radial 5 th layer of the stator core in the other conductor, the ninth second connecting part 1000 connects the welding end corresponding to the slot inside of the 29 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside of the 38 th slot of the radial 5 th layer of the stator core in the other conductor, the tenth second connecting part 1000 connects the welding end corresponding to the slot inside of the 30 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside of the 39 th slot of the radial 5 th layer of the stator core in the other conductor, and the welding end is located in the radial 6 th layer of the stator core, the pitches of the remaining second connection portions 1000 of the 5 th layer are the same as those of the 10 second connection portions, and the difference is only that the number of slots corresponding to the connected conductors is different, which is not further described herein; that is, the pitch of the second connection portion 1000 in the phase winding is the full pitch 9;

exemplarily, as shown in fig. 4, in the second embodiment, the pitch of the three conductors in the third coil unit 300 of each phase winding is a short pitch, the pitch of the first connection portion 2000 in the phase winding is a long pitch, and the pitch of the second connection portion 1000 in the phase winding is a full pitch.

Referring to fig. 4, in the second embodiment, specifically, each phase winding includes 2 third coil units 300, a first conductor of the first third coil unit 300 is located at the radial 3 rd layer 20 th slot and the 4 th layer 28 th slot of the stator core, a second conductor of the first third coil unit 300 is located at the radial 3 rd layer 21 st slot and the 4 th layer 29 th slot of the stator core, a third conductor of the first third coil unit 300 is located at the radial 3 rd layer 22 th slot and the 4 th layer 30 th slot of the stator core, a first conductor of the second third coil unit 300 is located at the radial 3 rd layer 47 th slot and the 4 th layer 1 st slot of the stator core, a second conductor of the second third coil unit 300 is located at the radial 3 rd layer 48 th slot and the 4 th layer 2 nd slot of the stator core, a third conductor of the second third coil unit 300 is located at the radial 3 rd layer 49 th slot and the 4 th layer 3 rd slot of the stator core, that is, each conductor in the third coil unit 300 of each phase winding is located at the radial 3 rd layer and 4 th layer of the stator core, and the pitch of each conductor in the third coil unit 300 is a short pitch 8; the phase winding comprises 17 first connecting parts 2000, the first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 1 st slot of a radial 4 th layer of a stator core in a conductor and a welding end corresponding to the inside of a slot in a 11 th slot of a radial 3 rd layer of the stator core in another conductor, the second first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 2 nd slot of a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a slot in a 12 th slot of a radial 3 rd layer of the stator core in another conductor, the third first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 3 rd slot of a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a slot in a 13 th slot of a radial 3 rd layer of the stator core in another conductor, and the fourth first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 10 th slot of a radial 4 th layer of the stator core in a conductor and a welding end of another conductor A welding end corresponding to the inside of a slot in a 20 th slot of a radial 3 rd layer of the stator core, a fifth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 11 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 21 st slot of a radial 3 rd layer of the stator core in another conductor, a sixth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 19 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 3 rd layer of the stator core in another conductor, a seventh first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 20 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 30 th slot of a radial 3 rd layer of the stator core in another conductor, and an eighth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 21 st slot of a radial 4 th layer of the stator core in one conductor The welding end corresponds to the welding end in the slot inside of the 31 st slot of the radial 3 rd layer of the stator core in the other conductor, the ninth first connecting part 2000 connects the welding end corresponding to the slot inside of the 28 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 38 th slot of the radial 3 rd layer of the stator core in the other conductor, the tenth first connecting part 2000 connects the welding end corresponding to the slot inside of the 29 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 39 th slot of the radial 3 rd layer of the stator core in the other conductor, the eleventh first connecting part 2000 connects the welding end corresponding to the slot inside of the 30 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 40 th slot of the radial 3 rd layer of the stator core in the other conductor, a twelfth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 37 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 3 rd layer of the stator core in another conductor, a thirteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 48 th slot of the radial 3 rd layer of the stator core in another conductor, a fourteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 39 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 49 th slot of the radial 3 rd layer of the stator core in another conductor, and a fifteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 46 th slot of the radial 4 th layer of the stator core in the conductor with a welding end of another conductor located in the radial 3 rd layer of the stator core in the radial direction A welding end corresponding to the inside of a slot in the 2 nd slot, a sixteenth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in the 47 th slot on the radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in the 3 rd slot on the radial 3 rd layer of the stator core in another conductor, and a seventeenth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in the 48 th slot on the radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in the 4 th slot on the radial 3 rd layer of the stator core in another conductor; that is, the pitch of the first connection portions 2000 in the phase winding is the long pitch 10; the phase winding comprises 35 second connecting portions 1000, a first second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 1 st slot of a radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 10 th slot of a radial 5 th layer of the stator core in another conductor, a second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 2 nd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 11 th slot of the radial 5 th layer of the stator core in another conductor, a third second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 3 rd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 12 th slot of the radial 5 th layer of the stator core in another conductor, and a fourth second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 10 th slot of the radial 6 th layer of the stator core in a conductor with a welding end of another conductor A welding end corresponding to the inside of a slot in a 19 th slot of a radial 5 th layer of the stator core, a fifth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 11 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 20 th slot of the radial 5 th layer of the stator core in another conductor, a sixth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 19 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 28 th slot of a radial 5 th layer of the stator core in another conductor, a seventh second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 20 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 5 th layer of the stator core in another conductor, and an eighth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 21 st slot of a radial 6 th layer of the stator core in one conductor The welding end corresponds to the welding end in the 30 th slot of the radial 5 th layer of the stator core in the other conductor, the ninth second connecting part 1000 connects the welding end corresponding to the slot inside in the 28 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside in the 37 th slot of the radial 5 th layer of the stator core in the other conductor, the tenth second connecting part 1000 connects the welding end corresponding to the slot inside in the 29 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside in the 38 th slot of the radial 5 th layer of the stator core in the other conductor, and the welding end is located in the radial 6 th layer of the stator core, the pitches of the remaining second connection portions 1000 of the 5 th layer are the same as those of the 10 second connection portions, and the difference is only that the number of slots corresponding to the connected conductors is different, which is not further described herein; i.e. the pitch of the second connection 1000 in the phase winding is the full pitch 9.

Exemplarily, as shown in fig. 5, in the third embodiment, the pitch of two conductors of the three conductors in the third coil unit 300 of each phase winding is a long pitch and the pitch of one conductor is a short pitch, the pitch of the first connection portion 2000 in the phase winding is a short pitch, and the pitch of the second connection portion 1000 in the phase winding is a full pitch.

Referring to fig. 5, in the third embodiment, specifically, each phase winding includes 2 third coil units 300, a first conductor of the first third coil unit 300 is located at the 19 th slot of the 3 rd layer and the 30 th slot of the 4 th layer in the radial direction of the stator core, a second conductor of the first third coil unit 300 is located at the 20 th slot of the 3 rd layer and the 31 th slot of the 4 th layer in the radial direction of the stator core, a third conductor of the first third coil unit 300 is located at the 21 rd slot of the 3 rd layer and the 29 th slot of the 4 th layer in the radial direction of the stator core, a first conductor of the second third coil unit 300 is located at the 46 th slot of the 3 rd layer and the 3 rd slot of the 4 th layer in the radial direction of the stator core, a second conductor of the second third coil unit 300 is located at the 47 th slot of the 3 rd layer and the 4 th slot in the radial direction of the stator core, a third conductor of the second third coil unit 300 is located at the 48 th slot of the 3 rd layer and the 2 nd slot of the 4 th layer in the radial direction of the stator core, that is, the pitch of the first conductor and the second conductor of the three conductors in the third coil unit 300 of each phase winding is long pitch 11, and the pitch of the third conductor of the three conductors in the third coil unit 300 is short pitch 8; the phase winding comprises 17 first connecting parts 2000, wherein the first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 2 nd groove of a radial 4 th layer of a stator core in a conductor and a welding end corresponding to the inside of a groove located in a 10 th groove of a radial 3 rd layer of the stator core in another conductor, the second first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 3 rd groove of the radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a groove located in a 11 th groove of the radial 3 rd layer of the stator core in another conductor, the third first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 4 th groove of the radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a groove located in a 12 th groove of the radial 3 rd layer of the stator core in another conductor, and the fourth first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 11 th groove of the radial 4 th layer of the stator core in a conductor and a middle conductor A welding end corresponding to the inside of a slot in a 19 th slot of a radial 3 rd layer of the stator core, a fifth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 12 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 20 th slot of a radial 3 rd layer of the stator core in another conductor, a sixth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 20 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 28 th slot of a radial 3 rd layer of the stator core in another conductor, a seventh first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 21 st slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 3 rd layer of the stator core in another conductor, an eighth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 22 th slot of a radial 4 th layer of the stator core in one conductor The welding end corresponds to the welding end in the groove inside of the 30 th groove of the radial 3 rd layer of the stator core in the other conductor, the ninth first connecting part 2000 connects the welding end corresponding to the groove inside of the 29 th groove of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the groove inside of the 37 th groove of the radial 3 rd layer of the stator core in the other conductor, the tenth first connecting part 2000 connects the welding end corresponding to the groove inside of the 30 th groove of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the groove inside of the 38 th groove of the radial 3 rd layer of the stator core in the other conductor, the eleventh first connecting part 2000 connects the welding end corresponding to the groove inside of the 31 st groove of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the groove inside of the 39 th groove of the radial 3 rd layer of the stator core in the other conductor, the twelfth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 46 th slot of the radial 3 rd layer of the stator core in another conductor, the thirteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 39 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 3 rd layer of the stator core in another conductor, the fourteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 40 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 48 th slot of the radial 3 rd layer of the stator core in another conductor, and the fifteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 4 th layer of the stator core in the other conductor with a welding end of the radial 3 rd layer of the stator core in the radial direction in another conductor The welding end corresponding to the inside of the slot of the 1 st slot, the sixteenth first connecting part 2000 is connected with the welding end corresponding to the inside of the slot of the 48 th slot positioned on the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of the slot of the 2 nd slot positioned on the radial 3 rd layer of the stator core in another conductor, and the seventeenth first connecting part 2000 is connected with the welding end corresponding to the inside of the slot of the 49 th slot positioned on the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of the slot of the 3 rd slot positioned on the radial 3 rd layer of the stator core in another conductor; that is, the pitch of the first connection portions 2000 in the phase winding is the short pitch 8; the phase winding comprises 35 second connecting portions 1000, a first second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 2 nd slot of a radial 6 th layer of a stator core in a conductor with a welding end corresponding to the inside of a slot located in a 11 th slot of a radial 5 th layer of the stator core in another conductor, a second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 3 rd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot located in a 12 th slot of the radial 5 th layer of the stator core in another conductor, a third second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 4 th slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot located in a 13 th slot of the radial 5 th layer of the stator core in another conductor, and a fourth second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in the 11 th slot of the radial 6 th layer of the stator core in a conductor with a welding end of the other conductor A welding end corresponding to the inside of a slot in a 20 th slot of a radial 5 th layer of the stator core, a fifth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 12 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 21 st slot of the radial 5 th layer of the stator core in another conductor, a sixth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 20 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 5 th layer of the stator core in another conductor, a seventh second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 21 st slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 30 th slot of a radial 5 th layer of the stator core in another conductor, and an eighth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 22 th slot in a radial 6 th layer of the stator core in one conductor The welding end corresponds to the welding end in the slot inside of the 31 st slot of the radial 5 th layer of the stator core in the other conductor, the ninth second connecting part 1000 connects the welding end corresponding to the slot inside of the 29 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside of the 38 th slot of the radial 5 th layer of the stator core in the other conductor, the tenth second connecting part 1000 connects the welding end corresponding to the slot inside of the 30 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside of the 39 th slot of the radial 5 th layer of the stator core in the other conductor, and the welding end is located in the radial 6 th layer of the stator core, the pitches of the remaining second connection portions 1000 of the 5 th layer are the same as those of the 10 second connection portions, and the difference is only that the number of slots corresponding to the connected conductors is different, which is not further described herein; that is, the pitch of the second connection portion 1000 in the phase winding is the full pitch 9;

exemplarily, as shown in fig. 6, in the fourth embodiment, the pitch of one of the three conductors in the third coil unit 300 of each phase winding is a long pitch and the pitch of the two conductors is a full pitch, the pitch of the first connection portion 2000 in the phase winding is a short pitch, and the pitch of the second connection portion 1000 in the phase winding is a full pitch.

Referring to fig. 6, in the fourth embodiment, specifically, each phase winding includes 2 third coil units 300, a first conductor of the first third coil unit 300 is located at the 19 th slot of the 3 rd layer and the 31 th slot of the 4 th layer in the radial direction of the stator core, a second conductor of the first third coil unit 300 is located at the 20 th slot of the 3 rd layer and the 29 th slot of the 4 th layer in the radial direction of the stator core, a third conductor of the first third coil unit 300 is located at the 21 rd slot of the 3 rd layer and the 30 th slot of the 4 th layer in the radial direction of the stator core, a first conductor of the second third coil unit 300 is located at the 46 th slot of the 3 rd layer and the 4 th slot of the 4 th layer in the radial direction of the stator core, a second conductor of the second third coil unit 300 is located at the 47 th slot of the 3 rd layer and the 2 nd slot of the 4 th layer in the radial direction of the stator core, a third conductor of the second third coil unit 300 is located at the 48 th slot of the 3 rd layer and the 3 rd layer in the radial direction of the 4 th slot of the stator core, that is, the pitch of the first of the three conductors in the third coil unit 300 of each phase winding is long pitch 12, and the pitch of the second and third of the three conductors in the third coil unit 300 is full pitch 9; the phase winding comprises 17 first connecting parts 2000, wherein the first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 2 nd groove of a radial 4 th layer of a stator core in a conductor and a welding end corresponding to the inside of a groove located in a 10 th groove of a radial 3 rd layer of the stator core in another conductor, the second first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 3 rd groove of the radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a groove located in a 11 th groove of the radial 3 rd layer of the stator core in another conductor, the third first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 4 th groove of the radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a groove located in a 12 th groove of the radial 3 rd layer of the stator core in another conductor, and the fourth first connecting part 2000 is connected with a welding end corresponding to the inside of a groove located in a 11 th groove of the radial 4 th layer of the stator core in a conductor and a middle conductor A welding end corresponding to the inside of a slot in a 19 th slot of a radial 3 rd layer of the stator core, a fifth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 12 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 20 th slot of a radial 3 rd layer of the stator core in another conductor, a sixth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 20 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 28 th slot of a radial 3 rd layer of the stator core in another conductor, a seventh first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 21 st slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 3 rd layer of the stator core in another conductor, an eighth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 22 th slot of a radial 4 th layer of the stator core in one conductor The welding end corresponds to the welding end in the groove inside of the 30 th groove of the radial 3 rd layer of the stator core in the other conductor, the ninth first connecting part 2000 connects the welding end corresponding to the groove inside of the 29 th groove of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the groove inside of the 37 th groove of the radial 3 rd layer of the stator core in the other conductor, the tenth first connecting part 2000 connects the welding end corresponding to the groove inside of the 30 th groove of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the groove inside of the 38 th groove of the radial 3 rd layer of the stator core in the other conductor, the eleventh first connecting part 2000 connects the welding end corresponding to the groove inside of the 31 st groove of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the groove inside of the 39 th groove of the radial 3 rd layer of the stator core in the other conductor, a twelfth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 46 th slot of the radial 3 rd layer of the stator core in another conductor, a thirteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 39 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 3 rd layer of the stator core in another conductor, a fourteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 40 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 48 th slot of the radial 3 rd layer of the stator core in another conductor, and a fifteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 4 th layer of the stator core in the conductor with a welding end of another conductor located in the radial 3 rd layer of the stator core in the radial direction The welding end corresponding to the inside of the slot of the 1 st slot, the sixteenth first connecting part 2000 is connected with the welding end corresponding to the inside of the slot of the 48 th slot positioned on the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of the slot of the 2 nd slot positioned on the radial 3 rd layer of the stator core in another conductor, and the seventeenth first connecting part 2000 is connected with the welding end corresponding to the inside of the slot of the 49 th slot positioned on the radial 4 th layer of the stator core in one conductor and the welding end corresponding to the inside of the slot of the 3 rd slot positioned on the radial 3 rd layer of the stator core in another conductor; that is, the pitch of the first connection portions 2000 in the phase winding is the short pitch 8; the phase winding comprises 35 second connecting portions 1000, a first second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 2 nd slot of a radial 6 th layer of a stator core in a conductor with a welding end corresponding to the inside of a slot located in a 11 th slot of a radial 5 th layer of the stator core in another conductor, a second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 3 rd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot located in a 12 th slot of the radial 5 th layer of the stator core in another conductor, a third second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in a 4 th slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot located in a 13 th slot of the radial 5 th layer of the stator core in another conductor, and a fourth second connecting portion 1000 connects a welding end corresponding to the inside of a slot located in the 11 th slot of the radial 6 th layer of the stator core in a conductor with a welding end of the other conductor A welding end corresponding to the inside of a slot in a 20 th slot of a radial 5 th layer of the stator core, a fifth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 12 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 21 st slot of the radial 5 th layer of the stator core in another conductor, a sixth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 20 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 5 th layer of the stator core in another conductor, a seventh second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 21 st slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 30 th slot of a radial 5 th layer of the stator core in another conductor, and an eighth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 22 th slot in a radial 6 th layer of the stator core in one conductor The welding end corresponds to the welding end in the slot inside of the 31 st slot of the radial 5 th layer of the stator core in the other conductor, the ninth second connecting part 1000 connects the welding end corresponding to the slot inside of the 29 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside of the 38 th slot of the radial 5 th layer of the stator core in the other conductor, the tenth second connecting part 1000 connects the welding end corresponding to the slot inside of the 30 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside of the 39 th slot of the radial 5 th layer of the stator core in the other conductor, and the welding end is located in the radial 6 th layer of the stator core, the pitches of the remaining second connection portions 1000 of the 5 th layer are the same as those of the 10 second connection portions, and the difference is only that the number of slots corresponding to the connected conductors is different, which is not further described herein; i.e. the pitch of the second connection 1000 in the phase winding is the full pitch 9.

Exemplarily, as shown in fig. 7, in the fifth embodiment, the pitch of two conductors of the three conductors in the third coil unit 300 of each phase winding is a full pitch and the pitch of one conductor is a short pitch, the pitch of the first connection portion 2000 in the phase winding is a long pitch, and the pitch of the second connection portion 1000 in the phase winding is a full pitch.

Referring to fig. 7, in the fifth embodiment, specifically, each phase winding includes 2 third coil units 300, a first conductor of the first third coil unit 300 is located at the radial 3 rd layer 20 th slot and the 4 th layer 29 th slot of the stator core, a second conductor of the first third coil unit 300 is located at the radial 3 rd layer 21 st slot and the 4 th layer 30 th slot of the stator core, a third conductor of the first third coil unit 300 is located at the radial 3 rd layer 22 th slot and the 4 th layer 28 th slot of the stator core, a first conductor of the second third coil unit 300 is located at the radial 3 rd layer 47 th slot and the 4 th layer 2 nd slot of the stator core, a second conductor of the second third coil unit 300 is located at the radial 3 rd layer 48 th slot and the 4 th layer 3 rd slot of the stator core, a third conductor of the second third coil unit 300 is located at the radial 3 rd layer 49 th slot and the 4 th layer 1 st slot of the stator core, that is, the pitch of the first conductor and the second conductor of the three conductors in the third coil unit 300 of each phase winding is a full pitch 9, and the pitch of the third conductor of the three conductors in the third coil unit 300 is a short pitch 6; the phase winding comprises 17 first connecting parts 2000, the first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 1 st slot of a radial 4 th layer of a stator core in a conductor and a welding end corresponding to the inside of a slot in a 11 th slot of a radial 3 rd layer of the stator core in another conductor, the second first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 2 nd slot of a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a slot in a 12 th slot of a radial 3 rd layer of the stator core in another conductor, the third first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 3 rd slot of a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a slot in a 13 th slot of a radial 3 rd layer of the stator core in another conductor, and the fourth first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 10 th slot of a radial 4 th layer of the stator core in a conductor and a welding end of another conductor A welding end corresponding to the inside of a slot in a 20 th slot of a radial 3 rd layer of the stator core, a fifth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 11 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 21 st slot of a radial 3 rd layer of the stator core in another conductor, a sixth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 19 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 3 rd layer of the stator core in another conductor, a seventh first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 20 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 30 th slot of a radial 3 rd layer of the stator core in another conductor, and an eighth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 21 st slot of a radial 4 th layer of the stator core in one conductor The welding end corresponds to the welding end in the slot inside of the 31 st slot of the radial 3 rd layer of the stator core in the other conductor, the ninth first connecting part 2000 connects the welding end corresponding to the slot inside of the 28 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 38 th slot of the radial 3 rd layer of the stator core in the other conductor, the tenth first connecting part 2000 connects the welding end corresponding to the slot inside of the 29 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 39 th slot of the radial 3 rd layer of the stator core in the other conductor, the eleventh first connecting part 2000 connects the welding end corresponding to the slot inside of the 30 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 40 th slot of the radial 3 rd layer of the stator core in the other conductor, a twelfth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 37 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 3 rd layer of the stator core in another conductor, a thirteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 48 th slot of the radial 3 rd layer of the stator core in another conductor, a fourteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 39 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 49 th slot of the radial 3 rd layer of the stator core in another conductor, and a fifteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 46 th slot of the radial 4 th layer of the stator core in the conductor with a welding end of another conductor located in the radial 3 rd layer of the stator core in the radial direction A welding end corresponding to the inside of a slot in the 2 nd slot, a sixteenth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in the 47 th slot on the radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in the 3 rd slot on the radial 3 rd layer of the stator core in another conductor, and a seventeenth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in the 48 th slot on the radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in the 4 th slot on the radial 3 rd layer of the stator core in another conductor; that is, the pitch of the first connection portions 2000 in the phase winding is the long pitch 10; the phase winding comprises 35 second connecting portions 1000, a first second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 1 st slot of a radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 10 th slot of a radial 5 th layer of the stator core in another conductor, a second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 2 nd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 11 th slot of the radial 5 th layer of the stator core in another conductor, a third second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 3 rd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 12 th slot of the radial 5 th layer of the stator core in another conductor, and a fourth second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 10 th slot of the radial 6 th layer of the stator core in a conductor with a welding end of another conductor A welding end corresponding to the inside of a slot in a 19 th slot of a radial 5 th layer of the stator core, a fifth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 11 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 20 th slot of the radial 5 th layer of the stator core in another conductor, a sixth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 19 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 28 th slot of a radial 5 th layer of the stator core in another conductor, a seventh second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 20 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 5 th layer of the stator core in another conductor, and an eighth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 21 st slot of a radial 6 th layer of the stator core in one conductor The welding end corresponds to the welding end in the 30 th slot of the radial 5 th layer of the stator core in the other conductor, the ninth second connecting part 1000 connects the welding end corresponding to the slot inside in the 28 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside in the 37 th slot of the radial 5 th layer of the stator core in the other conductor, the tenth second connecting part 1000 connects the welding end corresponding to the slot inside in the 29 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside in the 38 th slot of the radial 5 th layer of the stator core in the other conductor, and the welding end is located in the radial 6 th layer of the stator core, the pitches of the remaining second connection portions 1000 of the 5 th layer are the same as those of the 10 second connection portions, and the difference is only that the number of slots corresponding to the connected conductors is different, which is not further described herein; i.e. the pitch of the second connection 1000 in the phase winding is the full pitch 9.

Exemplarily, as shown in fig. 8, in the sixth embodiment, the pitch of one of the three conductors in the third coil unit 300 of each phase winding is a long pitch and the pitch of the two conductors is a short pitch, the pitch of the first connection portion 2000 in the phase winding is a long pitch, and the pitch of the second connection portion 1000 in the phase winding is a full pitch.

Referring to fig. 8, in the sixth embodiment, specifically, each phase winding includes 2 third coil units 300, a first conductor of the first third coil unit 300 is located at the radial 3 rd layer 20 th slot and the 4 th layer 30 th slot of the stator core, a second conductor of the first third coil unit 300 is located at the radial 3 rd layer 21 st slot and the 4 th layer 28 th slot of the stator core, a third conductor of the first third coil unit 300 is located at the radial 3 rd layer 22 nd slot and the 4 th layer 29 th slot of the stator core, a first conductor of the second third coil unit 300 is located at the radial 3 rd layer 47 th slot and the 4 th layer 3 rd slot of the stator core, a second conductor of the second third coil unit 300 is located at the radial 3 rd layer 48 th slot and the 4 th layer 1 st slot of the stator core, a third conductor of the second third coil unit 300 is located at the radial 3 rd layer 49 th slot and the 4 th layer 2 nd slot of the stator core, that is, the pitch of the first of the three conductors in the third coil unit 300 of each phase winding is a long pitch 10, and the pitch of the second and third of the three conductors in the third coil unit 300 is a short pitch 7; the phase winding comprises 17 first connecting parts 2000, the first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 1 st slot of a radial 4 th layer of a stator core in a conductor and a welding end corresponding to the inside of a slot in a 11 th slot of a radial 3 rd layer of the stator core in another conductor, the second first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 2 nd slot of a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a slot in a 12 th slot of a radial 3 rd layer of the stator core in another conductor, the third first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 3 rd slot of a radial 4 th layer of the stator core in a conductor and a welding end corresponding to the inside of a slot in a 13 th slot of a radial 3 rd layer of the stator core in another conductor, and the fourth first connecting part 2000 is connected with a welding end corresponding to the inside of a slot in a 10 th slot of a radial 4 th layer of the stator core in a conductor and a welding end of another conductor A welding end corresponding to the inside of a slot in a 20 th slot of a radial 3 rd layer of the stator core, a fifth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 11 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 21 st slot of a radial 3 rd layer of the stator core in another conductor, a sixth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 19 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 3 rd layer of the stator core in another conductor, a seventh first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 20 th slot of a radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 30 th slot of a radial 3 rd layer of the stator core in another conductor, and an eighth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in a 21 st slot of a radial 4 th layer of the stator core in one conductor The welding end corresponds to the welding end in the slot inside of the 31 st slot of the radial 3 rd layer of the stator core in the other conductor, the ninth first connecting part 2000 connects the welding end corresponding to the slot inside of the 28 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 38 th slot of the radial 3 rd layer of the stator core in the other conductor, the tenth first connecting part 2000 connects the welding end corresponding to the slot inside of the 29 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 39 th slot of the radial 3 rd layer of the stator core in the other conductor, the eleventh first connecting part 2000 connects the welding end corresponding to the slot inside of the 30 th slot of the radial 4 th layer of the stator core in the one conductor to the welding end corresponding to the slot inside of the 40 th slot of the radial 3 rd layer of the stator core in the other conductor, a twelfth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 37 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 47 th slot of the radial 3 rd layer of the stator core in another conductor, a thirteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 48 th slot of the radial 3 rd layer of the stator core in another conductor, a fourteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 39 th slot of the radial 4 th layer of the stator core in the conductor with a welding end corresponding to the inside of a slot located in the 49 th slot of the radial 3 rd layer of the stator core in another conductor, and a fifteenth first connecting portion 2000 connects a welding end corresponding to the inside of a slot located in the 46 th slot of the radial 4 th layer of the stator core in the conductor with a welding end of another conductor located in the radial 3 rd layer of the stator core in the radial direction A welding end corresponding to the inside of a slot in the 2 nd slot, a sixteenth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in the 47 th slot on the radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in the 3 rd slot on the radial 3 rd layer of the stator core in another conductor, and a seventeenth first connecting part 2000 connecting a welding end corresponding to the inside of a slot in the 48 th slot on the radial 4 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in the 4 th slot on the radial 3 rd layer of the stator core in another conductor; that is, the pitch of the first connection portions 2000 in the phase winding is the long pitch 10; the phase winding comprises 35 second connecting portions 1000, a first second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 1 st slot of a radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 10 th slot of a radial 5 th layer of the stator core in another conductor, a second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 2 nd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 11 th slot of the radial 5 th layer of the stator core in another conductor, a third second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 3 rd slot of the radial 6 th layer of the stator core in a conductor with a welding end corresponding to the inside of a slot in a 12 th slot of the radial 5 th layer of the stator core in another conductor, and a fourth second connecting portion 1000 connects a welding end corresponding to the inside of a slot in a 10 th slot of the radial 6 th layer of the stator core in a conductor with a welding end of another conductor A welding end corresponding to the inside of a slot in a 19 th slot of a radial 5 th layer of the stator core, a fifth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 11 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 20 th slot of the radial 5 th layer of the stator core in another conductor, a sixth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 19 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 28 th slot of a radial 5 th layer of the stator core in another conductor, a seventh second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 20 th slot of a radial 6 th layer of the stator core in one conductor with a welding end corresponding to the inside of a slot in a 29 th slot of a radial 5 th layer of the stator core in another conductor, and an eighth second connecting part 1000 connects a welding end corresponding to the inside of a slot in a 21 st slot of a radial 6 th layer of the stator core in one conductor The welding end corresponds to the welding end in the 30 th slot of the radial 5 th layer of the stator core in the other conductor, the ninth second connecting part 1000 connects the welding end corresponding to the slot inside in the 28 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside in the 37 th slot of the radial 5 th layer of the stator core in the other conductor, the tenth second connecting part 1000 connects the welding end corresponding to the slot inside in the 29 th slot of the radial 6 th layer of the stator core in the one conductor with the welding end corresponding to the slot inside in the 38 th slot of the radial 5 th layer of the stator core in the other conductor, and the welding end is located in the radial 6 th layer of the stator core, the pitches of the remaining second connection portions 1000 of the 5 th layer are the same as those of the 10 second connection portions, and the difference is only that the number of slots corresponding to the connected conductors is different, which is not further described herein; i.e. the pitch of the second connection 1000 in the phase winding is the full pitch 9.

Exemplarily, as shown in fig. 1 to 16, in the first to tenth embodiments, the pitch of two conductors of the 3 conductors of the first coil unit 100 is a long pitch and the pitch of one conductor is a short pitch, and the pitch of the 3 conductors of the second coil unit 200 is a full pitch.

With reference to fig. 1 to 16, in the first to tenth embodiments, the phase winding includes 2 first coil units 100, the first conductor of the first coil unit 100 is located in the 1 st slot and the 11 th slot of the 1 st layer of the stator core, the second conductor of the first coil unit 100 is located in the 2 nd slot and the 12 th slot of the 1 st layer of the stator core, the third conductor of the first coil unit 100 is located in the 3 rd slot and the 10 th slot of the 1 st layer of the stator core, the first conductor of the second first coil unit 100 is located in the 28 th slot and the 38 th slot of the 1 st layer of the stator core, the second conductor of the second first coil unit 100 is located in the 29 th slot and the 39 th slot of the 1 st layer of the stator core, the third conductor of the second first coil unit 100 is located in the 30 th slot and the 37 th slot of the 1 st layer of the stator core, namely, the two slot interiors of each of the 3 conductors of the first coil unit 100 are located at the radial 1 st layer of the stator core; the pitch of two conductors of the 3 conductors of the first coil unit 100 is long pitch 10, and the pitch of one conductor of the 3 conductors of the first coil unit 100 is short pitch 7; the phase winding comprises 2 second coil units 200, wherein a first conductor of the first second coil unit 200 is positioned in the 11 th slot and the 20 th slot of the 6 th layer of the stator core, a second conductor of the first second coil unit 200 is positioned in the 12 th slot and the 21 st slot of the 6 th layer of the stator core, a third conductor of the first second coil unit 200 is positioned in the 13 th slot and the 22 th slot of the 6 th layer of the stator core, a first conductor of the second coil unit 200 is positioned in the 38 th slot and the 47 th slot of the 6 th layer of the stator core, a second conductor of the second coil unit 200 is positioned in the 39 th slot and the 48 th slot of the 6 th layer of the stator core, a third conductor of the second coil unit 200 is positioned in the 40 th slot and the 49 th slot of the 6 th layer of the stator core, namely, the two slot interiors of each conductor of the second coil unit 200 are positioned at the 6 th layer in the radial direction of the stator core, and the pitch of 3 conductors of the second coil unit 200 is the whole pitch 9;

alternatively, the pitch of one conductor of the 3 conductors of the first coil unit 100 is a long pitch and the pitch of two conductors is a short pitch, and the pitch of the 3 conductors of the second coil unit 200 is a full pitch.

The phase winding comprises 2 first coil units 100, wherein a first conductor of the first coil unit 100 is positioned in a 1 st slot and a 12 th slot of a 1 st layer of a stator core, a second conductor of the first coil unit 100 is positioned in a 2 nd slot and a 10 th slot of the 1 st layer of the stator core, a third conductor of the first coil unit 100 is positioned in a 3 rd slot and a 11 th slot of the 1 st layer of the stator core, a first conductor of the second first coil unit 100 is positioned in a 28 th slot and a 39 th slot of the 1 st layer of the stator core, a second conductor of the second first coil unit 100 is positioned in a 29 th slot and a 37 th slot of the 1 st layer of the stator core, a third conductor of the second first coil unit 100 is positioned in a 30 th slot and a 38 th slot of the 1 st layer of the stator core, namely, the two inner parts of each conductor of the first coil unit are positioned in the 1 st layer of the radial direction of the stator core, and the long pitch 11 of one conductor in the 3 conductors of the first coil unit 100, the pitch of two conductors of the 3 conductors of the first coil unit 100 is a short pitch 8; the phase winding comprises 2 second coil units 200, wherein a first conductor of the first second coil unit 200 is positioned in the 11 th slot and the 20 th slot of the 6 th layer of the stator core, a second conductor of the first second coil unit 200 is positioned in the 12 th slot and the 21 st slot of the 6 th layer of the stator core, a third conductor of the first second coil unit 200 is positioned in the 13 th slot and the 22 th slot of the 6 th layer of the stator core, a first conductor of the second coil unit 200 is positioned in the 38 th slot and the 47 th slot of the 6 th layer of the stator core, a second conductor of the second coil unit 200 is positioned in the 39 th slot and the 48 th slot of the 6 th layer of the stator core, a third conductor of the second coil unit 200 is positioned in the 40 th slot and the 49 th slot of the 6 th layer of the stator core, namely, the two slot interiors of each conductor of the second coil unit 200 are positioned at the 6 th layer in the radial direction of the stator core, and the pitch of 3 conductors of the second coil unit 200 is the whole pitch 9;

illustratively, as shown in fig. 1 to 16, in the embodiment, the plurality of coil units of each phase winding further have a plurality of fourth coil units 400 and a plurality of fifth coil units 500, the fourth coil units 400 are located at two sides of the third coil units 300 in the same radial direction, part of the fifth coil units 500 are located in the same radial direction of the first coil unit 100, and the other part of the fifth coil units are located in the same radial direction of the second coil unit 200.

With reference to fig. 1 to 16, in the embodiment, the plurality of coil units of each phase winding further have 4 fourth coil units and 8 fifth coil units, the first third coil unit is located in the 3 rd layer, the 19 th slot, the 20 th slot, the 21 st slot and the 29 th slot, the 30 th slot and the 31 th slot of the radial layer of the stator core, and the two slots of each conductor of the third coil unit 300 are located in two adjacent layers of the radial layer of the stator core; the first fourth coil unit is positioned in the 20 th, 21 st, 22 nd, 29 th, 30 th and 31 st slots of the 5 th and 6 th layers of the stator core in the radial direction, and the second fourth coil unit is positioned in the 19 th, 20 th, 21 st and 28 th, 29 th and 30 th slots of the 1 st and 2 nd layers of the stator core in the radial direction; the two slot interiors of each conductor of the fourth coil unit 400 are located in two radially adjacent layers of the stator core; the first fourth coil unit is positioned in the third coil unit and extends from the third coil unit to one side close to the central axis of the stator core along the same radial direction of the stator core through a 19 th groove, a 20 th groove and a 21 st groove, and the second fourth coil unit is positioned in the third coil unit and extends from the third coil unit to one side far away from the central axis of the stator core along the same radial direction of the stator core through a 29 th groove, a 30 th groove and a 31 th groove; namely, the first fourth coil unit and the second fourth coil unit are respectively positioned at two sides of the first third coil unit in the same radial direction; the first coil unit 100 is located in the 1 st, 2 nd, 3 rd and 10 th, 11 th and 12 th slots of the radial 1 st layer of the stator core, the first fifth coil unit 500 is located in the 1 st, 2 nd, 3 rd and 10 th, 11 th and 12 th slots of the radial 2 nd, 3 rd layers of the stator core, the second fifth coil unit 500 is located in the 10 th, 11 th, 12 th and 19 th slots, 20 th and 21 th slots of the radial 3 rd layer of the stator core, and the fifth coil unit 500 is located in the two adjacent layers of the radial direction of the stator core; the first fifth coil unit and the second fifth coil unit are positioned in the first coil unit and positioned in the same radial direction of the first coil unit along the same radial direction of the stator core by a 10 th slot, a 11 th slot and a 12 th slot; the first second coil unit 200 is located at the 11 th, 12 th, 13 th and 20 th, 21 st and 22 nd slots of the 6 th layer of the radial direction of the stator core, the third fifth coil unit 500 is located at the 11 th, 12 th, 13 th and 20 th, 21 st and 22 th slots of the 5 th, 6 th layer of the radial direction of the stator core, and the fourth fifth coil unit 500 is located at the 2 nd, 3 rd, 4 th and 11 th, 12 th and 13 th slots of the 4 th, 5 th layer of the radial direction of the stator core; the third fifth coil unit and the fourth fifth coil unit are positioned in the first coil unit, and are positioned in the same radial direction of the first coil unit along the same radial direction of the stator core by the 11 th slot, the 12 th slot and the 13 th slot; namely, part of the fifth coil units are positioned in the same radial direction of the first coil units, and the other part of the fifth coil units are positioned in the same radial direction of the second coil units.

Exemplarily, as shown in fig. 3 to 8, in the first to sixth embodiments, the pitch of the 3 conductors of the fourth coil unit is a full pitch, specifically, the first conductor of the fourth coil unit is located in the 20 th slot of the 4 th layer and the 29 th slot of the 5 th layer in the radial direction of the stator core, the second conductor of the fourth coil unit is located in the 21 st slot of the 4 th layer and the 30 th slot of the 5 th layer in the radial direction of the stator core, the third conductor of the fourth coil unit is located in the 22 th slot of the 4 th layer and the 31 th slot of the 5 th layer in the radial direction of the stator core, that is, the pitch of the 3 conductors of the fourth coil unit is a full pitch 9;

alternatively, as shown in fig. 9 and 14, in the seventh embodiment, the pitch of two conductors in the 3 conductors of the fourth coil unit is a long pitch and the pitch of one conductor is a short pitch, specifically, the first conductor of the fourth coil unit is located in the 20 th slot of the 4 th layer and the 30 th slot of the 5 th layer in the radial direction of the stator core, the second conductor of the fourth coil unit is located in the 21 st slot of the 4 th layer and the 31 th slot of the 5 th layer in the radial direction of the stator core, the third conductor of the fourth coil unit is located in the 22 th slot of the 4 th layer and the 29 th slot of the 5 th layer in the radial direction of the stator core, that is, the pitch of two conductors in the 3 conductors of the fourth coil unit is a long pitch 10 and the pitch of one conductor is a short pitch 7;

alternatively, as shown in fig. 15, in the seventh embodiment, the pitch of one conductor of the 3 conductors of the fourth coil unit is a long pitch, and the pitch of two conductors is a short pitch, specifically, the first conductor of the fourth coil unit is located in the 20 th slot of the 4 th layer and the 31 th slot of the 5 th layer in the radial direction of the stator core, the second conductor of the fourth coil unit is located in the 21 st slot of the 4 th layer and the 29 th slot of the 5 th layer in the radial direction of the stator core, the third conductor of the fourth coil unit is located in the 22 nd slot of the 4 th layer and the 30 th slot of the 5 th layer in the radial direction of the stator core, that is, the pitch of one conductor of the 3 conductors of the fourth coil unit is the long pitch 11, and the pitch of two conductors is the short pitch 8;

exemplarily, as shown in fig. 3 to 9, in the first to seventh embodiments, the pitch of the 3 conductors of the fifth coil unit is a full pitch, specifically, the first conductor of the fourth coil unit is located in the 11 th slot of the 4 th layer and the 20 th slot of the 5 th layer in the radial direction of the stator core, the second conductor of the fourth coil unit is located in the 12 th slot of the 4 th layer and the 21 st slot of the 5 th layer in the radial direction of the stator core, the third conductor of the fourth coil unit is located in the 13 th slot of the 4 th layer and the 22 th slot of the 5 th layer in the radial direction of the stator core, that is, the pitch of the 3 conductors of the fourth coil unit is a full pitch 9;

alternatively, as shown in fig. 10 and 14, in an eighth embodiment, the pitch of two conductors in the 3 conductors of the fifth coil unit is a long pitch and the pitch of one conductor is a short pitch, specifically, the first conductor of the fifth coil unit is located in the 11 th slot of the 4 th layer and the 21 st slot of the 5 th layer in the radial direction of the stator core, the second conductor of the fifth coil unit is located in the 12 th slot of the 4 th layer and the 22 th slot of the 5 th layer in the radial direction of the stator core, the third conductor of the fifth coil unit is located in the 13 th slot of the 4 th layer and the 20 th slot of the 5 th layer in the radial direction of the stator core, that is, the pitch of two conductors in the 3 conductors of the fifth coil unit is a long pitch 10 and the pitch of one conductor is a short pitch 7;

alternatively, as shown in fig. 15, in the eighth embodiment, the pitch of one conductor of the 3 conductors of the fifth coil unit is a long pitch, and the pitch of two conductors is a short pitch, specifically, the first conductor of the fifth coil unit is located in the 11 th slot of the 4 th layer and the 22 nd slot of the 5 th layer in the radial direction of the stator core, the second conductor of the fifth coil unit is located in the 12 th slot of the 4 th layer and the 20 th slot of the 5 th layer in the radial direction of the stator core, the third conductor of the fifth coil unit is located in the 13 th slot of the 4 th layer and the 21 st slot of the 5 th layer in the radial direction of the stator core, that is, the pitch of one conductor of the 3 conductors of the fifth coil unit is a long pitch 11, and the pitch of two conductors is a short pitch 8;

illustratively, as shown in fig. 3 to 11, in the first to tenth embodiments, the lead end and the lead-out end of each phase winding are located at one end of the second axial connecting portion 200-1 and 200-2 of the stator core.

With reference to fig. 3 to 11, in the first to tenth embodiments, each phase winding includes two branch windings connected in parallel, and the lead-out wire of each branch winding may be located in any one of the circumferential slots of the stator core, in the first to tenth embodiments, the lead end U1 of the first branch winding is located at the 13 th slot of the 4 th layer at one end of the second connection portion 200 in the axial direction of the stator core, the lead-out end U3 of the first branch winding is located at the 21 st slot of the 3 rd layer at one end of the second connection portion 200 in the axial direction of the stator core, the lead end U2 of the second branch winding is located at the 13 th slot of the 6 th layer at one end of the second connection portion 200 in the axial direction of the stator core, and the lead-out end U4 of the second branch winding is located at the 22 nd slot of the 5 th layer at one end of the second connection portion 200 in the axial direction of the stator core.

Exemplarily, as shown in fig. 12, in the eleventh embodiment, the lead end and the lead-out end of each phase winding are located at one end of the stator core axial direction first connection portion 200.

Referring to fig. 12, in the eleventh embodiment, each phase winding includes two branch windings connected in parallel, the lead wire of each branch winding may be located in any one layer of the circumferential slots of the stator core, that is, the two connected slots of the first connection portion are opened to form a lead end and a lead out end, the lead end U1 of the first branch winding is led in from the 29 th slot of the 4 th layer located at one end of the stator core axial direction first connection portion 100, the lead out end U3 of the first branch winding is led out from the 19 th slot of the 3 rd layer located at one end of the stator core axial direction second connection portion 200, the lead end U2 of the second branch winding of the present application is led out from the 29 th slot of the 6 th layer located at one end of the stator core axial direction second connection portion 200, and the lead out end U4 of the second branch winding is led out from the 20 th slot of the 5 th layer located at one end of the stator core axial direction second connection portion 200.

The embodiment also provides a motor, which comprises the motor stator and a motor adopting the motor stator.

The motor provided by the embodiment of the present invention includes the motor stator in the above embodiment, and therefore, the motor provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not described herein again.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be mechanical or electrical, may be direct, may be indirect via an intermediate medium (bus connection), or may be communication between the two components. Those skilled in the art will understand what is specifically meant by the present invention. Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments 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 embodiments illustrated herein, and that various obvious changes, rearrangements and substitutions may be made therein by those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electric machine stator comprising:

the stator winding comprises a plurality of phase windings arranged on the stator core, and the number of slots of each pole and each phase of the stator winding is 3;

the method is characterized in that: the plurality of phase windings form 4M +2 layers in the radial direction of the stator core, wherein M is an integer greater than or equal to 1;

the coil units are positioned at the first end of the stator core in the axial direction, each coil unit comprises 3 conductors, the coil units are provided with K first coil units, K second coil units and a plurality of third coil units, the first coil units are positioned on the first layer of the stator core in the radial direction, the second coil units are positioned on the 4M +2 th layer of the stator core in the radial direction, the third coil units are positioned on the 4M/2+1 th layer and the 4M/2+2 th layer of the stator core in the radial direction, and K is an integer greater than or equal to 1;

the pitch of at least 2 conductors in the third coil unit of the phase winding is larger than the pitch of the first connection of the phase winding, or the pitch of at least 2 conductors in the third coil unit of the phase winding is smaller than the pitch of the first connection of the phase winding.

2. The stator for an electric motor according to claim 1, wherein the pitch of 3 conductors in the third coil unit of the phase winding is a long pitch, the pitch of the first connection portion in the phase winding is a short pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

3. The stator for an electric motor according to claim 1, wherein the pitch of 3 conductors in the third coil unit of the phase winding is a short pitch, the pitch of the first connection portion in the phase winding is a long pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

4. The stator for an electric motor according to claim 1, wherein the pitch of 2 of the 3 conductors in the third coil unit of the phase winding is a long pitch and the pitch of 1 conductor is a short pitch, the pitch of the first connection portion in the phase winding is a short pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

5. The stator for an electric motor according to claim 1, wherein the pitch of 1 of the 3 conductors in the third coil unit of the phase winding is a long pitch and the pitch of 2 conductors is a full pitch, the pitch of the first connection portion in the phase winding is a short pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

6. The stator for an electric motor according to claim 1, wherein the pitch of 2 of the 3 conductors in the third coil unit of the phase winding is a full pitch and the pitch of 1 conductor is a short pitch, the pitch of the first connection portion in the phase winding is a long pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

7. The stator for an electric motor according to claim 1, wherein the pitch of 1 of the 3 conductors in the third coil unit of the phase winding is a long pitch and the pitch of 2 conductors is a short pitch, the pitch of the first connection portion in the phase winding is a long pitch, and the pitch of the second connection portion in the phase winding is a full pitch.

8. The motor stator according to claim 1, wherein a pitch of 1 of the 3 conductors of the first coil unit is a long pitch and a pitch of 2 conductors is a short pitch, and a pitch of 3 conductors of the second coil unit is a full pitch;

or the pitch of 2 conductors in the 3 conductors of the first coil unit is a long pitch, the pitch of 1 conductor is a short pitch, and the pitch of 3 conductors of the second coil unit is a full pitch.

9. The stator for an electric motor according to any one of claims 1 to 8, wherein the plurality of coil units of each of the phase windings further has a plurality of fourth coil units and a plurality of fifth coil units, the fourth coil units being located on both sides of the third coil units in the same radial direction, a part of the fifth coil units being located in the same radial direction as the first coil units, and another part of the fifth coil units being located in the same radial direction as the second coil units.

10. The motor stator according to claim 9, wherein the pitch of the 3 conductors of the fourth coil unit is a full pitch, and/or the pitch of 2 conductors of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 1 conductor is a short pitch, and/or the pitch of 1 conductor of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 2 conductors is a short pitch;

11. The motor stator according to any one of claims 1 to 8, wherein the outgoing line of each of the phase windings is located at one end of the second connecting portion in the axial direction of the stator core; or the outgoing line of each phase winding is positioned at one end of the first axial connecting part of the stator core.

12. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 11.