CN216959454U

CN216959454U - Motor stator and motor

Info

Publication number: CN216959454U
Application number: CN202220365203.0U
Authority: CN
Inventors: 郑艳双
Original assignee: Tianjin Songzheng Auto Parts Co ltd
Current assignee: Borgwarner Powertrain Tianjin Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-12
Anticipated expiration: 2032-02-22

Abstract

The utility model provides a motor stator and a motor, wherein each phase winding is formed by connecting 4 branch windings in parallel, and the inside of a groove connected with the inlet wire end of one branch winding in the phase winding and the inside of a groove connected with the inlet wire end of the other branch winding in the phase winding are positioned in the circumferential direction of a stator core at intervals of 180 degrees; the branch winding is positioned on the first layer of the stator core in the radial direction and at least comprises a conductor with a pitch larger than the pole pitch and/or a conductor with a pitch smaller than the pole pitch. The embodiment of the application provides a motor stator and motor, adopt stator winding conductor number to be odd number layer, can effectively solve present stator winding number of piles and bring the increase of winding conductor number for the even number and can increase motor inductance, lead to exciting current to reduce, reduce the moment of torsion and the power of motor, can appear probably not satisfying the technical problem of moment of torsion and power simultaneously when leading to the motor design.

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

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

When the existing automobile hair pin motor is designed, the number of conductors of each slot of a motor stator is basically designed in an even number of layers, along with the requirement for higher and higher power density, the input current of a controller is continuously improved, and the number of the layers of windings is gradually increased in order to reduce the problems of winding skin effect, copper consumption and heating increase caused by the increase of the current. Because the hairpin motor windings are all the whole copper strip U-shaped wires, the hairpin motor windings are different from round wire windings of the traditional motor, the number of turns cannot be freely adjusted, and in the design process, the number of layers of the stator windings is increased from 2 layers and 4 layers to 6 layers and 8 layers at present, so that the hairpin motor is convenient to manufacture.

The influence that the increase of the conductor number of piles can effectual solution controller input current increases and brings, but the increase of stator winding conductor number can increase motor inductance, leads to exciting current to reduce, reduces the moment of torsion and the power of motor, can appear the condition that can not satisfy moment of torsion and power simultaneously when leading to the motor design.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a stator and a motor, wherein the number of stator winding conductors is an odd number of layers, so that the technical problems that the motor inductance is increased due to the increase of the number of winding conductors caused by the even number of the stator winding layers, the exciting current is reduced, the torque and the power of the motor are reduced, and the torque and the power cannot be simultaneously met during the design of the motor can be effectively solved.

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

a stator winding including a plurality of phase windings mounted on the stator core and forming M layers in a radial direction of the stator core, M being an odd number of 3 or more;

each phase winding is formed by connecting 4 branch windings in parallel, and the inside of a groove connected with the inlet wire end of one branch winding in the phase winding and the inside of a groove connected with the inlet wire end of the other branch winding in the phase winding are positioned at intervals of 180 degrees in the circumferential direction of the stator core; the branch winding is positioned on the first layer of the stator core in the radial direction and at least comprises a conductor with a pitch larger than the pole pitch and/or a conductor with a pitch smaller than the pole pitch.

Furthermore, each branch winding is located on the Mth layer and the M-1 th layer in the radial direction of the stator core and comprises a plurality of conductors with the pitches equal to the polar distance, and/or each branch winding is located on the Mth layer and the M-1 th layer in the radial direction of the stator core and comprises a plurality of conductors with the pitches larger than the polar distance and a plurality of conductors with the pitches smaller than the polar distance.

Furthermore, each branch winding is located on the M-2 th layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with the pitches equal to the pole pitch, and/or each branch winding is located on the M-2 th layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with the pitches larger than the pole pitch and a plurality of conductors with the pitches smaller than the pole pitch.

Furthermore, each branch winding is located on the Mth layer and the M-1 th layer in the radial direction of the stator core and comprises a plurality of conductors with pitches larger than the polar distance, and/or each branch winding is located on the Mth layer and the M-1 th layer in the radial direction of the stator core and comprises a plurality of conductors with pitches larger than the polar distance and a plurality of conductors with pitches equal to the polar distance.

Further, each branch winding is located on the M-2 th layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with pitches larger than the pole pitch, and/or each branch winding is located on the M-2 th layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with pitches larger than the pole pitch and a plurality of conductors with pitches equal to the pole pitch.

Furthermore, each branch winding is located on the Mth layer and the M-1 th layer in the radial direction of the stator core and comprises a plurality of conductors with pitches smaller than the polar distance, and/or each branch winding is located on the Mth layer and the M-1 th layer in the radial direction of the stator core and comprises a plurality of conductors with pitches smaller than the polar distance and a plurality of conductors with pitches equal to the polar distance.

Further, each branch winding is located on the M-2 th layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with pitches smaller than the pole pitch, and/or each branch winding is located on the M-2 th layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with pitches smaller than the pole pitch and a plurality of conductors with pitches equal to the pole pitch.

Further, the pitch between two conductors connected in each branch winding is a full pitch.

Further, the pitch between two conductors connected in each branch winding is a short pitch.

Further, the pitch between two conductors connected in each branch winding is a long pitch.

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

By applying the technical scheme of the utility model, the motor stator and the motor comprise: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; a stator winding including a plurality of phase windings mounted on a stator core and forming M layers in a radial direction of the stator core, M being an odd number equal to or greater than 3; each phase winding is formed by connecting 4 branch windings in parallel, and the inside of a groove connected with the inlet wire end of one branch winding in the phase winding and the inside of a groove connected with the inlet wire end of the other branch winding in the phase winding are positioned at intervals of 180 degrees in the circumferential direction of the stator core; the branch winding is located at the radial first layer of the stator core and at least comprises a conductor with a pitch larger than a pole pitch and/or a conductor with a pitch smaller than the pole pitch. The embodiment of the application provides a stator and motor, adopts stator winding conductor number to be odd number layer, can effectively solve present stator winding number of piles and bring the increase of winding conductor number for the even number and can increase motor inductance, leads to exciting current to reduce, reduces the moment of torsion and the power of motor, can appear probably not satisfying the technical problem of moment of torsion and power simultaneously when leading to the motor design.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) 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 view of the structure of a stator of an electric motor in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a stator winding-phase winding structure according to an embodiment of the present invention;

FIG. 3 is a schematic plan view of a shunt winding according to one embodiment of the present invention;

FIG. 4 is a schematic plan view of a branch winding according to a second embodiment of the present invention;

FIG. 5 is a schematic plan view of a branch winding according to a third embodiment of the present invention;

FIG. 6 is a schematic plan view of a branch winding according to a fourth embodiment of the present invention;

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

FIG. 8 is a schematic plan view of a branch winding according to a sixth embodiment of the present invention;

FIG. 9 is a schematic plan view of a branch winding according to a seventh embodiment of the present invention;

FIG. 10 is a schematic plan view of a branch winding according to an eighth embodiment of the present invention;

FIG. 11 is a schematic plan view of a winding of one branch in the ninth embodiment of the present invention;

FIG. 12 is a schematic plan view of a branch winding in accordance with a tenth 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 inner parts of two grooves of the same conductor along the circumferential direction, or the pitch is the sum of the span between the inner parts of the grooves corresponding to one welding end of one conductor and the span between the inner parts of the grooves corresponding to one welding end of the other conductor; each conductor comprises two in-slot parts positioned in different slots in the circumferential direction of the stator core, out-slot turning parts positioned outside the slots and connected to the two in-slot parts, and out-slot parts positioned outside the slots and respectively connected to the two in-slot parts; it should be noted that, in this application, the radial first layer of the stator core may be the first layer in the direction away from the central axis of the stator core, and may also be the first layer in the direction close to the central axis of the stator core.

As shown in fig. 1, an embodiment of the present invention provides a stator of an electric machine, including: a stator core 20 having a plurality of slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; a stator winding 10 including a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, and forming M layers in a radial direction of the stator core 20, the multi-phase winding forming 5 layers in the radial direction of the stator core in the present embodiment; in addition, M may be an odd number of 3 or more; with reference to fig. 1 to 12, the stator winding 10 is a three-phase (i.e., U-phase, V-phase, W-phase) winding, and each pole has a slot equal to 2 per phase; each pole of the rotor is provided with 6 slots 21, the rotor has eight 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 48 (i.e., 2X8X3), 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 faces in the axial direction of the stator core, and other conventional metal plates may be used instead of the magnetic steel plates.

For example, as shown in fig. 1 to 12, each phase winding is formed by connecting 4 branch windings in parallel, wherein the incoming ends of the 2 branch windings are located at 180 degrees in the circumferential direction of the stator core; each branch winding is located at the radial first layer of the stator core and at least comprises a conductor with a pitch larger than a pole pitch and/or a conductor with a pitch smaller than the pole pitch.

With reference to fig. 1 to 12, each phase winding is a 4-branch winding connected in parallel, wherein the inside of the conductor slot connected with the inlet end U1 of the first branch winding and the inside of the conductor slot connected with the inlet end U3 of the second branch winding are located at 180 degrees in the circumferential direction of the stator core; specifically, the wire inlet end U1 of the first branch winding of the U-phase winding is connected with the conductor slot positioned in the 7 th slot of the 5 th layer of the stator core, the wire outlet end U2 of the first branch winding is connected with the conductor slot positioned in the 38 th slot of the 5 th layer of the stator core, the wire inlet end U3 of the second branch winding of the U-phase winding is connected with the conductor slot positioned in the 31 th slot of the 5 th layer of the stator core, and the wire outlet end U4 of the second branch winding is connected with the conductor slot positioned in the 13 th slot of the 5 th layer of the stator core; in the embodiment of the application, the number of the slots is 48, the slot inside the slot connected with the line inlet end U1 of the first branch winding is located in the slot inside the slot connected with the 7 th slot and the line inlet end U3 of the second branch winding is located in the 31 st slot, and the phase difference is 24 slots (namely 180 degrees in the circumferential direction of the stator core); correspondingly, the inner part of the conductor slot connected with the wire inlet end U5 of the third branch winding of the U-phase winding and the inner part of the conductor slot connected with the wire inlet end U1 of the first branch winding are positioned in circumferentially adjacent slots of the stator core in the embodiment of the application; and the conductor groove connected with the wire inlet end U7 of the fourth branch winding of the U-phase winding and the conductor groove connected with the wire inlet end U3 of the second branch winding are positioned in circumferentially adjacent grooves of the stator core.

With reference to fig. 3, in the first embodiment, each branch winding located in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding of the U-phase winding includes a conductor with a pitch larger than the pole pitch located in the 13 th slot and the 20 th slot of the first radial layer of the stator core and a conductor with a pitch smaller than the pole pitch located in the 26 th slot and the 31 th slot of the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 2 nd and 7 th slots in the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 37 th and 44 th slots in the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 14 th and 19 th slots in the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 25 th and 32 th slots in the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with a pitch larger than the pole pitch of the 1 st slot and the 8 th slot of the first radial layer of the stator core and a conductor with a pitch smaller than the pole pitch of the 38 th slot and the 43 th slot of the first radial layer of the stator core, that is, each branch winding of the U-phase winding comprises a conductor with a pitch larger than the pole pitch and a conductor with a pitch smaller than the pole pitch of the first radial layer of the stator core.

With reference to fig. 4, in the second embodiment, each branch winding in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding of the U-phase winding includes a conductor with a pitch smaller than the pole pitch in the 14 th slot and the 19 th slot in the first radial layer of the stator core and a conductor with a pitch equal to the pole pitch in the 25 th slot and the 31 th slot in the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with one pitch equal to the polar distance of the 1 st slot and the 7 th slot of the first radial layer of the stator core and a conductor with one pitch smaller than the polar distance of the 38 th slot and the 43 th slot of the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with one pitch larger than the polar distance of the 13 th slot and the 20 th slot of the first radial layer of the stator core and a conductor with one pitch equal to the polar distance of the 26 th slot and the 32 th slot of the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with one pitch equal to the pole pitch in the 2 nd and 8 th slots of the first radial layer of the stator core and a conductor with one pitch greater than the pole pitch in the 37 th and 44 th slots of the first radial layer of the stator core, that is, part of the branch winding of the U-phase winding comprises a conductor with one pitch greater than the pole pitch and a conductor with one pitch equal to the pole pitch in the first radial layer of the stator core, and part of the branch winding of the U-phase winding comprises a conductor with one pitch less than the pole pitch and a conductor with one pitch equal to the pole pitch in the first radial layer of the stator core.

With reference to fig. 5 and 7, in the third and fifth embodiments, each branch winding in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding in the U-phase winding includes a conductor having a pitch larger than the pole pitch in the 13 th and 20 th slots in the first radial layer of the stator core and a conductor having a pitch smaller than the pole pitch in the 26 th and 31 th slots in the first radial layer of the stator core; the third branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 2 nd and 7 th slots in the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 37 th and 44 th slots in the first radial layer of the stator core, and correspondingly, the second branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 14 th and 19 th slots in the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 25 th and 32 th slots in the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with one pitch larger than the pole pitch of the 1 st and 8 th slots in the first radial layer of the stator core and a conductor with one pitch smaller than the pole pitch of the 38 th and 43 th slots in the first radial layer of the stator core, that is, each branch winding of the U-phase winding comprises a conductor with one pitch larger than the pole pitch and a conductor with one pitch smaller than the pole pitch in the first radial layer of the stator core.

With reference to fig. 6, in the fourth embodiment, each branch winding in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding of the U-phase winding includes a conductor with a pitch smaller than the pole pitch in the 14 th slot and the 19 th slot in the first radial layer of the stator core and a conductor with a pitch larger than the pole pitch in the 25 th slot and the 32 th slot in the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with one pitch larger than the polar distance of the 1 st slot and the 8 th slot of the first radial layer of the stator core and a conductor with one pitch smaller than the polar distance of the 38 th slot and the 43 th slot of the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with one pitch larger than the polar distance of the 13 th slot and the 20 th slot of the first radial layer of the stator core and a conductor with one pitch smaller than the polar distance of the 26 th slot and the 31 th slot of the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with one pitch smaller than the pole pitch of the 2 nd and 7 th slots in the first radial layer of the stator core and a conductor with one pitch larger than the pole pitch of the 37 th and 44 th slots in the first radial layer of the stator core, i.e. each branch winding of the U-phase winding comprises a conductor with one pitch larger than the pole pitch and a conductor with one pitch smaller than the pole pitch in the first radial layer of the stator core.

With reference to fig. 8, in the sixth embodiment, each branch winding located in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding of the U-phase winding includes a conductor with a pitch smaller than the pole pitch located in the 15 th slot and the 20 th slot of the first radial layer of the stator core and a conductor with a pitch larger than the pole pitch located in the 26 th slot and the 33 th slot of the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with a pitch larger than the polar distance of the 2 nd and 9 th slots on the first radial layer of the stator core and a conductor with a pitch smaller than the polar distance of the 39 th and 44 th slots on the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with a pitch larger than the polar distance of the 14 th and 21 st slots on the first radial layer of the stator core and a conductor with a pitch smaller than the polar distance of the 27 th and 32 th slots on the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with a pitch smaller than the pole pitch in the 3 rd and 8 th slots of the first radial layer of the stator core and a conductor with a pitch larger than the pole pitch in the 38 th and 45 th slots of the first radial layer of the stator core, that is, each branch winding of the U-phase winding comprises a conductor with a pitch larger than the pole pitch and a conductor with a pitch smaller than the pole pitch in the first radial layer of the stator core.

With reference to fig. 9, in the seventh embodiment, each branch winding in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding in the U-phase winding includes a conductor with a pitch larger than the pole pitch in the 14 th and 21 st slots in the first radial layer of the stator core and a conductor with a pitch smaller than the pole pitch in the 27 th and 32 nd slots in the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 3 rd slot and the 8 th slot of the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 38 th slot and the 45 th slot of the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 15 th slot and the 20 th slot of the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 26 th slot and the 33 th slot of the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with one pitch larger than the pole pitch of the 2 nd and 9 th slots in the first radial layer of the stator core and a conductor with one pitch smaller than the pole pitch of the 39 th and 44 th slots in the first radial layer of the stator core, i.e. each branch winding of the U-phase winding comprises a conductor with one pitch larger than the pole pitch and a conductor with one pitch smaller than the pole pitch in the first radial layer of the stator core.

With reference to fig. 10, in the eighth embodiment, each branch winding in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding in the U-phase winding includes a conductor with a pitch larger than the pole pitch in the 14 th and 21 st slots in the first radial layer of the stator core and a conductor with a pitch equal to the pole pitch in the 27 th and 33 th slots in the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with one pitch equal to the polar distance of the 3 rd slot and the 9 th slot of the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 38 th slot and the 45 th slot of the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 15 th slot and the 20 th slot of the first radial layer of the stator core and a conductor with one pitch equal to the polar distance of the 26 th slot and the 32 th slot of the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with a pitch equal to the pole pitch in the 2 nd and 8 th slots of the first radial layer of the stator core and a conductor with a pitch smaller than the pole pitch in the 39 th and 44 th slots of the first radial layer of the stator core, that is, a part of the branch winding of the U-phase winding comprises a conductor with a pitch larger than the pole pitch and a conductor with a pitch equal to the pole pitch in the first radial layer of the stator core, and a part of the branch winding of the U-phase winding comprises a conductor with a pitch smaller than the pole pitch and a conductor with a pitch equal to the pole pitch in the first radial layer of the stator core.

With reference to fig. 11, in the ninth embodiment, each branch winding in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding of the U-phase winding includes a conductor having a pitch smaller than the pole pitch in the 14 th slot and the 19 th slot in the first radial layer of the stator core and a conductor having a pitch equal to the pole pitch in the 25 th slot and the 31 th slot in the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with one pitch equal to the polar distance of the 1 st slot and the 7 th slot of the first radial layer of the stator core and a conductor with one pitch smaller than the polar distance of the 38 th slot and the 43 th slot of the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with one pitch larger than the polar distance of the 13 th slot and the 20 th slot of the first radial layer of the stator core and a conductor with one pitch equal to the polar distance of the 26 th slot and the 32 th slot of the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with a pitch equal to the pole pitch in the 2 nd and 8 th slots of the first radial layer of the stator core and a conductor with a pitch greater than the pole pitch in the 37 th and 44 th slots of the first radial layer of the stator core, that is, a part of the branch winding of the U-phase winding comprises a conductor with a pitch greater than the pole pitch and a conductor with a pitch equal to the pole pitch in the first radial layer of the stator core, and a part of the branch winding of the U-phase winding comprises a conductor with a pitch less than the pole pitch and a conductor with a pitch equal to the pole pitch in the first radial layer of the stator core.

With reference to fig. 12, in the tenth embodiment, each branch winding in the first radial layer of the stator core includes a plurality of conductors, and the first branch winding in the U-phase winding includes a conductor having a pitch larger than the pole pitch in the 13 th and 20 th slots in the first radial layer of the stator core and a conductor having a pitch smaller than the pole pitch in the 26 th and 31 th slots in the first radial layer of the stator core; the second branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 2 nd and 7 th slots in the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 37 th and 44 th slots in the first radial layer of the stator core, and correspondingly, the third branch winding of the U-phase winding comprises a conductor with one pitch smaller than the polar distance of the 14 th and 19 th slots in the first radial layer of the stator core and a conductor with one pitch larger than the polar distance of the 25 th and 32 th slots in the first radial layer of the stator core; the fourth branch winding of the U-phase winding comprises a conductor with a pitch larger than the pole pitch of the 1 st slot and the 8 th slot of the first radial layer of the stator core and a conductor with a pitch smaller than the pole pitch of the 38 th slot and the 43 th slot of the first radial layer of the stator core, that is, each branch winding of the U-phase winding comprises a conductor with a pitch larger than the pole pitch and a conductor with a pitch smaller than the pole pitch of the first radial layer of the stator core.

For example, as shown in fig. 3, 4, and 6, in the first, second, and fourth embodiments, each branch winding located at the 5 th layer and the 4 th layer in the radial direction of the stator core includes a plurality of conductors (including 1 or more) larger than the pole pitch and a plurality of conductors (including 1 or more) smaller than the pole pitch; as shown in fig. 5, in the third embodiment, each branch winding located at the 5 th layer and the 4 th layer in the radial direction of the stator core includes a plurality of conductors with the pitch equal to the pole pitch.

For example, as shown in fig. 3 to 4, in the first to second embodiments, each branch winding located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core includes a plurality of conductors (including 1 or more) whose pitches are greater than the pole pitch and a plurality of conductors (including 1 or more) whose pitches are less than the pole pitch; as shown in fig. 5 to 6, in the third to fourth embodiments, each branch winding located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core includes a plurality of conductors (including 1 or more) with a pitch equal to the pole pitch.

With reference to fig. 3, in the first embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes a conductor located in the 5 th layer, the 7 th layer, and the 14 th layer of the stator core, which are larger than the pole pitch, a conductor located in the 5 nd layer, the 2 nd layer, and the 4 th layer, the 7 th layer, which are smaller than the pole pitch, of the stator core, a conductor located in the 5 th layer, the 44 th layer, and the 4 th layer, the 1 st groove, which are smaller than the pole pitch, of the stator core, and a conductor located in the 5 th layer, the 37 th layer, and the 4 th layer, which are larger than the pole pitch, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes two conductors whose pitch is larger than the pole pitch and two conductors whose pitch are smaller than the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned in the 13 th groove and the 20 th groove of the 5 th layer of the stator core and is larger than the polar distance, a conductor which is positioned in the 20 th groove and the 25 th groove of the 5 th layer and the 4 th layer of the stator core and is smaller than the polar distance, a conductor which is positioned in the 26 th groove and the 31 th groove of the 5 th layer and the 4 th layer of the stator core and is smaller than the polar distance, and a conductor which is positioned in the 31 th groove of the 5 th layer and the 38 th groove of the 4 th layer of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises two conductors of which the pitch is larger than the polar distance and two conductors of which are smaller than the polar distance;

with reference to fig. 4, in the second embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes a conductor located in the 7 th slot and the 14 th slot of the 5 th layer and the 4 th layer of the stator core, a conductor located in the 1 st slot and the 8 th slot of the 5 th layer of the stator core, which are larger than the pole pitch, a conductor located in the 38 th slot and the 43 th slot of the 5 th layer of the stator core, which are smaller than the pole pitch, and a conductor located in the 43 th slot and the 2 nd slot of the 4 th layer of the stator core, which are larger than the pole pitch, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes three conductors having pitches larger than the pole pitch and one having pitches smaller than the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned in the 14 th groove and the 19 th groove of the 5 th layer of the stator core and is smaller than the polar distance, a conductor which is positioned in the 19 th groove and the 26 th groove of the 5 th layer and the 4 th layer of the stator core and is larger than the polar distance, a conductor which is positioned in the 25 th groove and the 32 th groove of the 5 th layer and the 4 th layer of the stator core and is larger than the polar distance, and a conductor which is positioned in the 31 th groove of the 5 th layer and the 38 th groove of the 4 th layer of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises three conductors of which the pitch is larger than the polar distance and a conductor of which the pitch is smaller than the polar distance;

with reference to fig. 6, in the fourth embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes a conductor located in the 5 th layer, the 7 th layer, and the 14 th layer of the stator core, which are larger than the pole pitch, a conductor located in the 5 nd layer, the 2 nd layer, and the 4 th layer, the 7 th layer, which are smaller than the pole pitch, of the stator core, a conductor located in the 5 th layer, the 37 th layer, and the 4 th layer, the 44 th layer, which are larger than the pole pitch, of the stator core, and a conductor located in the 5 th layer, the 44 th layer, and the 4 th layer, the conductor smaller than the pole pitch, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes two conductors whose pitch is larger than the pole pitch and two conductors whose pitch are smaller than the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned in the 13 th groove and the 20 th groove of the 5 th layer of the stator core and is larger than the polar distance, a conductor which is positioned in the 20 th groove and the 25 th groove of the 5 th layer and the 4 th layer of the stator core and is smaller than the polar distance, a conductor which is positioned in the 26 th groove and the 31 th groove of the 5 th layer and the 4 th layer of the stator core and is smaller than the polar distance, and a conductor which is positioned in the 31 th groove of the 5 th layer and the 38 th groove of the 4 th layer of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises two conductors of which the pitch is larger than the polar distance and two conductors of which are smaller than the polar distance;

with reference to fig. 5, in the third embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes a conductor equal to the pole pitch located in the 7 th slot and the 13 th slot of the 5 th layer and the 4 th layer of the stator core, a conductor equal to the pole pitch located in the 2 nd slot and the 8 th slot of the 5 th layer of the stator core, a conductor equal to the pole pitch located in the 37 th slot and the 43 th slot of the 4 th layer of the stator core, and a conductor equal to the pole pitch located in the 44 th slot and the 2 nd slot of the 4 th layer of the stator core, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core and includes 4 conductors equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned on the 5 th layer, the 13 th layer, the 4 th layer and the 19 th layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 5 th layer, the 20 th layer and the 4 th layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 5 th layer, the 26 th layer and the 4 th layer of the stator core and is equal to the polar distance, and a conductor which is positioned on the 5 th layer, the 31 th layer and the 4 th layer of the stator core and is equal to the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises 4 conductors with the pitch equal to the polar distance;

with reference to fig. 3, in the first embodiment, the first branch winding in the U-phase winding is located at the radial 2 nd layer and the 3 rd layer of the stator core, and includes a conductor smaller than the pole pitch located in the 3 rd layer 2 nd slot and the 2 nd layer 7 nd slot of the stator core, a conductor larger than the pole pitch located in the 3 rd layer 7 th slot and the 2 nd layer 14 th slot of the stator core, a conductor larger than the pole pitch located in the 3 rd layer 13 th slot and the 2 nd layer 20 th slot of the stator core, and a conductor smaller than the pole pitch located in the 3 rd layer 20 th slot and the 2 nd layer 25 th slot of the stator core, that is, the first branch winding is located at the radial 3 rd layer and the 2 nd layer of the stator core, and includes two conductors with a pitch larger than the pole pitch and two conductors with a pitch smaller than the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned in the 3 rd layer 26 th groove and the 2 nd layer 31 nd groove of the stator core and is smaller than the polar distance, a conductor which is positioned in the 3 rd layer 31 th groove and the 2 nd layer 38 th groove of the stator core and is larger than the polar distance, a conductor which is positioned in the 3 rd layer 37 th groove and the 2 nd layer 44 th groove of the stator core and is larger than the polar distance, and a conductor which is positioned in the 3 rd layer 44 th groove and the 2 nd layer 1 st groove of the stator core and is smaller than the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises two conductors of which the pitch is larger than the polar distance and two conductors of which the pitch is smaller than the polar distance;

with reference to fig. 4, in the second embodiment, the first branch winding in the U-phase winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes a conductor located at the 3 rd layer 1 st slot and the 2 nd layer 8 th slot of the stator core and larger than the pole pitch, a conductor located at the 3 rd layer 8 th slot and the 2 nd layer 13 th slot of the stator core and smaller than the pole pitch, a conductor located at the 3 rd layer 14 th slot and the 2 nd layer 19 th slot of the stator core and smaller than the pole pitch, and a conductor located at the 3 rd layer 20 th slot and the 2 nd layer 25 th slot of the stator core and smaller than the pole pitch, that is, the first branch winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes a conductor having a pitch larger than the pole pitch and three conductors having a pitch smaller than the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned on the 3 rd layer, the 25 th groove and the 2 nd layer, the 32 nd groove and the 2 nd layer, the conductor which is positioned on the 3 rd layer, the 32 nd groove and the 37 nd groove of the stator core and is smaller than the polar distance, the conductor which is positioned on the 3 rd layer, the 44 th groove and the 2 nd layer, the conductor which is positioned on the 3 rd layer and the 1 st groove of the stator core and is smaller than the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor with a pitch which is larger than the polar distance and three conductors with a pitch which is smaller than the polar distance;

with reference to fig. 5, in the third embodiment, the first branch winding in the U-phase winding is located at the radial 3 rd layer and the 2 nd layer of the stator core, and includes a conductor equal to the pole pitch located in the 3 rd layer 1 st slot and the 2 nd layer 7 th slot of the stator core, a conductor equal to the pole pitch located in the 3 rd layer 8 th slot and the 2 nd layer 14 th slot of the stator core, a conductor equal to the pole pitch located in the 3 rd layer 14 th slot and the 2 nd layer 20 th slot of the stator core, and a conductor equal to the pole pitch located in the 3 rd layer 19 th slot and the 2 nd layer 25 th slot of the stator core, that is, the first branch winding is located at the radial 3 rd layer and the 2 nd layer of the stator core and includes 4 conductors with the pitch equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned on the 3 rd layer, the 25 th groove and the 31 nd layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 3 rd layer, the 32 th groove and the 2 nd layer, the 38 th groove of the stator core and is equal to the polar distance, a conductor which is positioned on the 3 rd layer, the 38 th groove and the 2 nd layer, the 44 th groove of the stator core and is equal to the polar distance, and a conductor which is positioned on the 3 rd layer, the 43 th groove and the 2 nd layer, the 1 st groove of the stator core and is equal to the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 4 conductors with the pitch which is equal to the polar distance;

with reference to fig. 6, in the fourth embodiment, the first branch winding in the U-phase winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes a conductor located at the 3 rd layer, the 2 nd layer, the 8 nd layer, the 7 th layer, the 13 th layer, the 19 nd layer, and the 26 nd layer of the stator core, which are equal to the polar distance, i.e., the first branch winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes 4 conductors having a pitch equal to the polar distance; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned on the 3 rd layer, the 26 th layer and the 2 nd layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 3 rd layer, the 31 st layer and the 2 nd layer, the 37 th layer and is equal to the polar distance, a conductor which is positioned on the 3 rd layer, the 37 th layer and the 2 nd layer of the stator core and is equal to the polar distance, and a conductor which is positioned on the 3 rd layer, the 44 nd layer and the 2 nd layer of the stator core and is equal to the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 4 conductors with the pitch equal to the polar distance;

illustratively, as shown in fig. 3 to 6, in the first to fourth embodiments, the pitch between the two conductors connected in each branch winding in the U-phase winding is a full pitch.

With reference to fig. 3, in the first embodiment, specifically, the wire inlet end U1 of one branch winding of the U-phase winding is connected to the conductor located in the 7 th slot and the 14 th slot of the 5 th layer and the 4 th layer in the radial direction of the stator core, where the conductor is located in the 20 th slot and the 25 nd slot of the 2 nd layer in the radial direction of the stator core, where the conductor is located in the 7 th slot and the 14 th slot of the 4 th layer in the radial direction of the stator core, where the pitch between the two welding ends located in the 20 th slot and the 25 nd slot of the 3 rd layer in the radial direction of the stator core, where the conductor is connected to the two welding ends located in the 20 th slot and the 2 nd layer in the radial direction of the stator core, where the conductor is located in the 20 th slot of the 3 rd layer and the 25 nd slot of the 2 nd layer in the radial direction of the stator core, where the conductor is connected to the conductor located in the slot of the 20 th slot of the 3 rd layer in the radial direction of the stator core, where the other conductor is located in the radial layer, where the pitch is 6 th slot and the conductor is located in the radial direction of the first layer in the radial direction of the radial layer in the radial direction of the stator core, where the conductor is located in the second layer, where the second welding ends located in the second layer, where the conductor is located in the second layer, where the pitch is located in the second layer, where the pitch is 6 pitch is located in the second layer, where the pitch is located in the pitch is 6 pitch, where the pitch is 6 th slot, where the pitch is the entire pitch is 6 th slot, where the entire pitch is located in the entire pitch is 6 th slot, where the entire pitch is located in the entire pitch, where the entire pitch is 6 th slot (that is located in the entire pitch is 6 th slot in the entire pitch is located in the entire pitch of the entire core, where the entire pitch of the stator core, where the entire core The pitch between the two connected welding ends is 6), and the pitch between the two conductors connected with each conductor in fig. 3 is the whole pitch, which is not further described herein; with reference to fig. 4, in the second embodiment, specifically, the wire inlet end U1 of one branch winding of the U-phase winding is connected to the conductor located in the 7 th slot and the 14 th slot of the 5 th layer and the 4 th layer in the radial direction of the stator core, where the conductor is located in the 20 th slot and the 25 nd slot of the 2 nd layer in the radial direction of the stator core, where the conductor is located in the 7 th slot and the 14 th slot of the 4 th layer in the radial direction of the stator core, where the conductor is located in the 20 th slot of the 3 rd layer and the 25 nd slot of the 2 nd layer in the radial direction of the stator core, where the pitch between the two welding ends connected to each other and located in the 20 th slot of the 3 rd layer and the 25 nd layer in the radial direction of the stator core is 6, and the conductor located in the 20 th slot of the 3 rd layer and the 25 nd layer in the radial direction of the stator core, where the conductor is located in the slot of the other conductor is located in the 20 th slot of the 3 rd layer and the 25 th layer in the radial direction of the stator core, where the pitch is equal to the conductor is located in the whole pitch 6 (i.e slot in the radial direction of the stator core, where one conductor is connected to the conductor located in the slot and the slot of the first layer in the second layer in the radial direction of the first layer of the radial direction of the stator core, where the conductor is located in the second layer of the second layer and the second layer of the stator core, where the conductor is located in the second layer of the first layer of the second layer of the first layer of the stator core, where the second layer of the stator core, where the second layer of the conductor is located in the first layer of the second layer of the stator core, where the second layer of the stator core, where the conductor is located in the second layer of the first layer of the whole pitch is located in the whole pitch 6 th slot of the whole pitch 6 th slot of the whole pitch of The pitch between the two connected welding ends is 6), and the pitch between the two conductors connected with each conductor in fig. 4 is the whole pitch, which is not further described herein; with reference to fig. 5, in the third embodiment, specifically, the wire inlet end U1 of one branch winding of the U-phase winding is connected to the conductor with the same pole pitch in the 5 th and 4 th slots in the radial direction of the stator core, and the conductor with the same pole pitch in the 3 rd and 2 nd slots in the radial direction of the stator core is connected to the conductor with the larger pole pitch in the 19 rd and 2 nd slots in the 3 rd and 2 nd slots in the radial direction of the stator core by a whole pitch 6 (i.e. one conductor is connected in the slot of the 13 th slot in the 4 th layer of the stator core, and the pitch between the two welding ends connected in the slot of the other conductor in the 19 rd slot in the 3 rd layer of the stator core, and the conductor with the same pole pitch in the 25 nd slot in the 3 rd and 2 nd slots in the radial direction of the stator core is connected to the conductor with the smaller pole pitch in the 31 st and 26 th slots in the radial direction of the first layer of the stator core by a whole pitch 6 (i.e. one conductor is connected in the slot in the 25 nd slot in the 2 nd layer of the first layer of the stator core, and the conductor connected in the slot in the first layer of the stator core The pitch between the two connected welding ends is 6), and the pitch between the two conductors connected with each conductor in fig. 5 is the whole pitch, which is not further described herein; with reference to fig. 6, in the fourth embodiment, specifically, the wire inlet end U1 of one branch winding of the U-phase winding is connected to the conductor located in the 7 th slot and the 14 th slot of the 5 th layer and the 4 th layer in the radial direction of the stator core, where the conductor is connected to the conductor located in the 20 th slot and the 26 nd slot of the 3 rd layer and the 2 nd layer in the radial direction of the stator core, and the pitch between the conductors equal to the pole pitch is the whole pitch 6 (i.e. one conductor is located in the slot of the 14 th slot of the 4 th layer of the stator core, and the conductor located in the slot of the 20 rd slot of the 3 rd layer and the 26 nd layer in the radial direction of the stator core is connected to the two welding ends connected to the conductor located in the slot of the 20 th slot and the 25 th slot of the 3 nd layer of the stator core, where the conductor is connected to the conductor located in the slot of the 3 rd layer and the 26 nd layer in the radial direction of the stator core, where the conductor is connected to the conductor located in the slot of the 3 rd layer and the second layer is connected to the conductor located in the slot of the first layer and the pole pitch is the whole pitch 6 th slot of the stator core, and the conductor located in the second layer of the second layer and the second layer of the stator core, is connected to the conductor located in the whole pitch 6 th slot of the whole pitch 6 th layer (i.e.e.e connection of the stator core, i.e.e.e. the connection of the conductor located in the slot of the second layer of the first layer of the second layer of the stator core, and the second layer of the stator core, and the first layer of the second layer of the stator core is connected to the conductor located in the second layer of the first layer of the second layer of the whole pitch is connected to the whole pitch of the whole pitch The pitch between the two connected welding ends is 6), and the pitch between the two conductors connected with each conductor in fig. 6 is the whole pitch, which is not further described herein;

for example, as shown in fig. 10 and 11, in an eighth embodiment and a ninth embodiment, each branch winding located at the 5 th layer and the 4 th layer in the radial direction of the stator core includes a plurality of conductors (including 1 or more) larger than the pole pitch and a plurality of conductors (including 1 or more) equal to the pole pitch; as shown in fig. 12, in the tenth embodiment, each branch winding located at the 5 th and 4 th layers in the radial direction of the stator core includes a plurality of conductors having a pitch larger than the pole pitch.

Exemplarily, as shown in fig. 11, in the ninth embodiment, each branch winding located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core includes a plurality of conductors (including 1 or more number) with a pitch larger than the pole pitch and a plurality of conductors (including 1 or more number) with a pitch equal to the pole pitch; as shown in fig. 10 and 12, in the eighth and tenth embodiments, each branch winding located at the 3 rd and 2 nd layers in the radial direction of the stator core includes a plurality of conductors (including 1 or more) having a pitch larger than the pole pitch.

With reference to fig. 10, in an eighth embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes one conductor located at the 7 th slot and the 15 th slot of the 5 th layer of the stator core, which are larger than the pole pitch, one conductor located at the 14 th slot and the 20 th slot of the 5 th layer of the stator core, which are equal to the pole pitch, one conductor located at the 26 th slot and the 20 th slot of the 4 th layer of the stator core, which are equal to the pole pitch, and one conductor located at the 32 th slot and the 26 th slot of the 5 th layer of the stator core, which are equal to the pole pitch, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, which includes one conductor with a pitch larger than the pole pitch and three conductors with a pitch equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned on the 5 th layer, the 8 th layer and the 4 th layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 5 nd layer, the 2 nd layer and the 4 th layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 5 th layer, the 44 th layer and the 4 th layer of the stator core and is equal to the polar distance, and a conductor which is positioned on the 5 th layer, the 39 th layer and the 4 th layer of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor with the pitch larger than the polar distance and three conductors with the pitch equal to the polar distance;

with reference to fig. 11, in the ninth embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes a conductor located at the 1 st slot and the 9 th slot of the 5 th layer and the 4 th layer of the stator core, a conductor located at the 7 th slot and the 15 th slot of the 5 th layer and the 4 th layer of the stator core, a conductor equal to the pole pitch located at the 38 th slot and the 44 th slot of the 5 th layer and the 4 th layer of the stator core, and a conductor greater than the pole pitch located at the 43 rd slot and the 3 rd slot of the 5 th layer and the 4 th layer of the stator core, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes three conductors with a pitch greater than the pole pitch and one conductor equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned on the 5 th layer, the 14 th layer and the 4 th layer, the 14 th layer and the 20 th layer, of the stator core and is equal to the polar distance, a conductor which is positioned on the 5 th layer, the 19 th layer and the 4 th layer, the 27 th layer, of the stator core and is larger than the polar distance, a conductor which is positioned on the 5 th layer, the 25 th layer and the 4 th layer, the 33 th layer, of the stator core and is larger than the polar distance, and a conductor which is positioned on the 5 th layer, the 31 th layer and the 4 th layer, of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises three conductors of which are larger than the polar distance and a conductor of which is equal to the polar distance;

with reference to fig. 12, in an embodiment ten, the first branch winding in the U-phase winding located at the 5 th layer and the 4 th layer in the radial direction of the stator core includes a conductor located at the 7 th slot and the 14 th slot of the 5 th layer and the 4 th layer of the stator core and larger than the pole pitch, a conductor located at the 2 nd slot and the 9 th slot of the 5 th layer and the 4 th layer of the stator core and larger than the pole pitch, a conductor located at the 44 th slot and the 3 rd slot of the 5 th layer and the 4 th layer of the stator core and larger than the pole pitch, and a conductor located at the 37 th slot and the 44 th slot of the 5 th layer and the 4 th layer of the stator core and larger than the pole pitch, that is, the first branch winding located at the 5 th layer and the 4 th layer in the radial direction of the stator core includes 4 conductors with pitches larger than the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned in the 13 th groove and the 20 th groove of the 5 th layer of the stator core and is larger than the polar distance, a conductor which is positioned in the 20 th groove and the 27 th groove of the 5 th layer and the 4 th layer of the stator core and is larger than the polar distance, a conductor which is positioned in the 26 th groove and the 33 th groove of the 5 th layer and the 4 th layer of the stator core and is larger than the polar distance, and a conductor which is positioned in the 31 th groove of the 5 th layer and the 38 th groove of the 4 th layer of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises 4 conductors of which pitches are larger than the polar distance;

with reference to fig. 10, in the eighth embodiment, the first branch winding in the U-phase winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes a conductor located at the 45 th slot and the 38 nd slot of the 3 rd layer and the 2 nd layer of the stator core and larger than the pole pitch, a conductor located at the 39 th slot and the 32 nd slot of the 3 rd layer and the 2 nd layer of the stator core and larger than the pole pitch, a conductor located at the 33 rd slot and the 26 nd slot of the 3 nd layer and the 2 nd layer of the stator core and larger than the pole pitch, and a conductor located at the 26 th slot and the 19 nd slot of the 3 rd layer and the 2 nd layer of the stator core and larger than the pole pitch, that is, the first branch winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes 4 conductors having pitches larger than the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned in the 3 rd layer 21 st slot and the 2 nd layer 14 nd slot of the stator core and is larger than the polar distance, a conductor which is positioned in the 3 rd layer 15 th slot and the 2 nd layer 8 th slot of the stator core and is larger than the polar distance, a conductor which is positioned in the 3 rd layer 9 th slot and the 2 nd layer 2 nd slot of the stator core and is larger than the polar distance, and a conductor which is positioned in the 3 rd layer 2 nd slot and the 2 nd layer 43 th slot of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 4 conductors of which the pitch is larger than the polar distance;

with reference to fig. 12, in the tenth embodiment, the first branch winding in the U-phase winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes a conductor located at the 1 st slot and the 8 nd slot of the 3 rd layer and the 2 nd layer of the stator core and larger than the pole pitch, a conductor located at the 8 th slot and the 15 nd slot of the 3 rd layer and the 2 nd layer of the stator core and larger than the pole pitch, a conductor located at the 14 th slot and the 21 nd slot of the 3 rd layer and the 2 nd layer of the stator core and larger than the pole pitch, and a conductor located at the 19 th slot and the 26 nd slot of the 3 rd layer and the 2 nd layer of the stator core and larger than the pole pitch, that is, the first branch winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes 4 conductors having pitches larger than the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned in the 3 rd layer, the 25 th groove and the 2 nd layer, the 32 nd groove and the 2 nd layer, the conductor which is positioned in the 3 rd layer, the 32 nd groove and the 39 nd groove of the stator core and is larger than the polar distance, a conductor which is positioned in the 3 rd layer, the 38 th groove and the 2 nd layer, the 45 th groove of the stator core and is larger than the polar distance, and a conductor which is positioned in the 3 rd layer, the 43 rd groove and the 2 nd layer, the 2 nd groove of the stator core and is larger than the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 4 conductors of which the pitch is larger than the polar distance;

with reference to fig. 11, in the ninth embodiment, the first branch winding in the U-phase winding is located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core, and includes a conductor located at the 1 st slot and the 9 nd slot in the 3 nd layer and the 2 nd layer of the stator core and larger than the pole pitch, a conductor located at the 8 th slot and the 14 nd slot in the 3 rd layer and the 2 nd layer of the stator core and equal to the pole pitch, a conductor located at the 14 th slot and the 20 nd slot in the 3 rd layer and the 2 nd layer of the stator core and equal to the pole pitch, and a conductor located at the 20 th slot and the 26 nd slot in the 3 rd layer and the 2 nd layer of the stator core and equal to the pole pitch, that is, the first branch winding is located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core and includes 1 conductor with a pitch larger than the pole pitch and 3 conductors with a pitch equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned in the 3 rd layer, the 25 th groove and the 33 nd groove of the 2 nd layer of the stator core and is larger than the polar distance, a conductor which is positioned in the 3 rd layer, the 32 th groove and the 38 nd groove of the 2 nd layer of the stator core and is equal to the polar distance, a conductor which is positioned in the 3 rd layer, the 38 th groove and the 44 nd groove of the 2 nd layer of the stator core and is equal to the polar distance, and a conductor which is positioned in the 3 rd layer, the 44 nd groove and the 2 nd groove of the stator core and is equal to the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 1 conductor with the pitch which is larger than the polar distance and 3 conductors with the pitch which is equal to the polar distance;

illustratively, as shown in fig. 10 to 12, in the eighth to tenth embodiments, the pitch between the two conductors connected in each branch winding in the U-phase winding is a short pitch.

With reference to fig. 10, in the eighth embodiment, specifically, the line inlet end U1 of one branch winding of the U-phase winding is connected to the conductors located in the 5 th layer 8 th slot and the 4 th layer 2 nd slot in the radial direction of the stator core, the pitch between the conductors located in the 3 rd layer 45 th slot and the 2 nd layer 38 th slot in the radial direction of the stator core and larger than the pole pitch is short pitch 5 (that is, the pitch between the two welding ends where one conductor is located in the slot of the 4 th layer 2 nd slot of the stator core and connected to the other conductor located in the slot of the 3 rd layer 45 th slot of the stator core is 5), and the pitch between the conductors located in the first layer 33 th slot and the first layer 27 th slot in the radial direction of the stator core and larger than the pole pitch is short pitch 5 (that one conductor is located in the slot of the 2 nd layer 38 th slot of the stator core and connected to the other conductor located in the slot of the first layer 33 th slot of the stator core in the radial direction of the stator core and the second layer 38 th slot of the stator core is short pitch 5 th layer The pitch between two welding terminals connected between the parts is 5), and the pitch between two conductors connected with each conductor in fig. 10 is a short pitch, which is not further described herein; with reference to fig. 12, in the tenth embodiment, specifically, the pitch between the conductors of the larger pole pitch, which are connected to the conductor located in the 7 th slot and the 14 th slot of the 5 th layer in the radial direction of the stator core and the conductor located in the 14 th slot of the 4 th layer in the radial direction of the stator core, and the conductor located in the larger pole pitch, which is connected to the conductors located in the 19 rd slot and the 26 nd slot of the 2 nd layer in the radial direction of the stator core, of the U1 branch winding of the U phase winding is the short pitch 5 (that is, the pitch between the two welding ends, which are connected to each other between the conductors located in the 19 th slot of the 3 rd layer in the radial direction of the stator core, of one conductor located in the 14 th slot of the 4 th layer in the radial direction of the stator core and the other conductor located in the 19 th slot of the 3 rd layer in the radial direction of the stator core is 5), and the pitch between the conductors located in the first slot and the conductor located in the 26 th layer in the first layer in the radial direction of the stator core is the smaller than the pitch is the short pitch 5 th slot (that one conductor located in the first layer in the radial direction of the stator core) (that is connected to each other conductor located in the 31 st slot of the radial layer in the radial direction of the stator core The pitch between the two connected welding terminals is 5), and the pitch between the two conductors connected with each conductor in fig. 12 is a short pitch, which is not further described herein; in the ninth embodiment, referring to fig. 11, specifically, the pitch between the conductors equal to the pole pitch, which are connected to the conductor located in the 7 th slot and the 15 th slot of the 5 th layer in the radial direction of the stator core and are connected to the conductor located in the 20 th slot and the 26 nd slot of the 2 nd layer in the radial direction of the stator core, of the line end U1 of one branch winding of the U-phase winding is short pitch 5 (i.e. the pitch between the two welding ends, which are connected to each other and located in the slot of the 20 th slot and the 20 nd slot of the 3 rd layer in the radial direction of the stator core, of one conductor located in the 15 th slot of the 4 th layer in the radial direction of the stator core is 5), and the pitch between the conductors equal to the pole pitch, which are connected to each other and located in the slot of the 20 th slot and the 25 th layer in the 3 rd layer in the radial direction of the stator core is short pitch 5 (i.e. the pitch between the conductor located in the slot of the first layer 31 th slot and the 25 th slot in the first layer in the radial direction of the stator core, of one conductor located in the 2 nd layer in the radial direction of the stator core is short pitch 5 th slot The pitch between the two connected welding ends is 5), and the pitch between the two conductors connected with each conductor in fig. 5 is a short pitch, which is not further described herein;

exemplarily, as shown in fig. 7 and 8, in the fifth embodiment and the sixth embodiment, each branch winding located at the 5 th layer and the 4 th layer in the radial direction of the stator core includes a plurality of conductors (including 1 or more number) smaller than the pole pitch and a plurality of conductors (including 1 or more number) equal to the pole pitch; as shown in fig. 9, in the seventh embodiment, each branch winding located at the 5 th layer and the 4 th layer in the radial direction of the stator core includes a plurality of conductors with a pitch smaller than the pole pitch.

Exemplarily, as shown in fig. 7, in the fifth embodiment, each branch winding located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core includes a plurality of conductors (including 1 or more) whose pitch is greater than the pole pitch and a plurality of conductors (including 1 or more) whose pitch is equal to the pole pitch; as shown in fig. 8 and 9, in the sixth and seventh embodiments, each branch winding located at the 3 rd and 2 nd layers in the radial direction of the stator core includes a plurality of conductors (including 1 or more) having a pitch larger than the pole pitch.

With reference to fig. 7, in the fifth embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes a conductor located in the 7 th slot and the 3 rd slot of the 5 th layer and the 4 th layer of the stator core, which is smaller than the pole pitch, a conductor located in the 2 nd slot and the 44 th slot of the 5 th layer of the stator core, which is equal to the pole pitch, a conductor located in the 44 th slot and the 38 th slot of the 5 th layer of the stator core, which is smaller than the pole pitch, and a conductor located in the 33 th slot and the 37 th slot of the 4 th layer of the stator core, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, which includes two conductors with a pitch smaller than the pole pitch and two conductors with a pitch equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned on the 5 th layer, the 13 th layer, the 9 th layer, the 14 th layer and the 20 th layer of the stator core and is less than the polar distance, a conductor which is positioned on the 5 th layer, the 14 th layer and the 4 th layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 5 th layer, the 20 th layer and the 4 th layer of the stator core and is equal to the polar distance, and a conductor which is positioned on the 5 th layer, the 27 th layer and the 4 th layer of the stator core and is less than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises two conductors of which the pitch is less than the polar distance and two conductors of which the pitch is equal to the polar distance;

with reference to fig. 8, in the sixth embodiment, the first branch winding in the U-phase winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes a conductor located at the 3 rd slot and the 7 th slot of the 5 th layer and the 4 th layer of the stator core, which are smaller than the pole pitch, a conductor located at the 8 th slot and the 14 th slot of the 5 th layer and the 4 th layer of the stator core, a conductor located at the 38 th slot and the 44 th slot of the 5 th layer and the 4 th layer of the stator core, which are equal to the pole pitch, and a conductor located at the 45 th slot and the 1 st slot of the 5 th layer and the 4 th layer of the stator core, which are smaller than the pole pitch, that is, the first branch winding is located at the 5 th layer and the 4 th layer in the radial direction of the stator core, and includes two conductors whose pitch is smaller than the pole pitch and two conductors whose pitch are equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned on the 5 th layer, the 14 th layer and the 4 th layer, the 14 th layer and the 20 th layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 5 th layer, the 21 st layer and the 4 th layer, the 25 th layer of the stator core and is smaller than the polar distance, a conductor which is positioned on the 5 th layer, the 27 th layer and the 4 th layer, the 31 th layer of the stator core and is smaller than the polar distance, and a conductor which is positioned on the 5 th layer, the 32 th layer and the 4 th layer, the 4 th layer and is equal to the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises two conductors of which are smaller than the polar distance and two conductors of which are equal to the polar distance;

with reference to fig. 9, in the seventh embodiment, the first branch winding in the U-phase winding located at the radial 5 th layer and the 4 th layer of the stator core includes a conductor less than the pole pitch located at the 5 rd layer, the 3 rd slot and the 4 th layer, the 8 th slot and the 4 th layer, the 13 th slot of the stator core, a conductor less than the pole pitch located at the 5 th layer, the 38 th slot and the 4 th layer, the 43 th slot of the stator core, and a conductor less than the pole pitch located at the 5 th layer, the 45 th slot and the 4 th layer, the 2 nd slot of the stator core, that is, the first branch winding located at the radial 5 th layer and the 4 th layer of the stator core includes 4 conductors with a pitch less than the pole pitch; the second branch winding in the U-phase winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises a conductor which is positioned in the 14 th groove and the 19 th groove of the 5 th layer of the stator core and is smaller than the polar distance, a conductor which is positioned in the 21 st groove and the 26 th groove of the 5 th layer and the 4 th layer of the stator core and is smaller than the polar distance, a conductor which is positioned in the 27 th groove and the 32 th groove of the 5 th layer and the 4 th layer of the stator core and is smaller than the polar distance, and a conductor which is positioned in the 32 th groove of the 5 th layer and the 37 th groove of the 4 th layer of the stator core and is smaller than the polar distance, namely the second branch winding is positioned on the 5 th layer and the 4 th layer in the radial direction of the stator core and comprises 4 conductors of which pitches are smaller than the polar distance;

with reference to fig. 7, in the fifth embodiment, the first branch winding in the U-phase winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes a conductor located at the 44 th slot and the 38 nd slot of the 3 rd layer and the 2 nd layer of the stator core and equal to the pole pitch, a conductor located at the 37 th slot and the 33 nd slot of the 3 rd layer and the 2 nd layer of the stator core and less than the pole pitch, a conductor located at the 31 rd slot and the 27 nd slot of the 3 rd layer and the 2 nd layer of the stator core and equal to the pole pitch, that is, the first branch winding located at the radial 3 rd layer and the 2 nd layer of the stator core includes 2 conductors with a pitch less than the pole pitch and 2 conductors with a pitch equal to the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned on the 3 rd layer, the 20 th layer and the 14 nd layer of the stator core and is equal to the polar distance, a conductor which is positioned on the 3 rd layer, the 13 th layer and the 2 nd layer, the 9 th layer of the stator core and is smaller than the polar distance, a conductor which is positioned on the 3 rd layer, the 7 th layer and the 2 nd layer, the 3 rd layer and the 3 rd layer of the stator core and is smaller than the polar distance, and a conductor which is positioned on the 3 rd layer, the 2 nd layer and the 2 nd layer, the 44 th layer of the stator core and is equal to the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 2 conductors of which the pitch is smaller than the polar distance and 2 conductors of which are equal to the polar distance;

with reference to fig. 8, in the sixth embodiment, the first branch winding in the U-phase winding is located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core, and includes a conductor smaller than the pole pitch located in the 3 rd layer and the 8 th layer of the stator core, a conductor smaller than the pole pitch located in the 3 rd layer and the 13 th layer of the stator core, a conductor smaller than the pole pitch located in the 3 rd layer and the 14 th layer and the 2 nd layer and the 19 th layer of the stator core, and a conductor smaller than the pole pitch located in the 3 rd layer and the 26 nd layer of the stator core, that is, the first branch winding is located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core and includes 4 conductors with a pitch smaller than the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned on the 3 rd layer 27 th groove and the 2 nd layer 32 nd groove of the stator core and is smaller than the polar distance, a conductor which is positioned on the 3 rd layer 32 th groove and the 2 nd layer 37 th groove of the stator core and is smaller than the polar distance, a conductor which is positioned on the 3 rd layer 38 th groove and the 2 nd layer 43 th groove of the stator core and is smaller than the polar distance, and a conductor which is positioned on the 3 rd layer 45 th groove and the 2 nd layer 2 nd groove of the stator core and is smaller than the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 4 conductors of which the pitch is smaller than the polar distance;

with reference to fig. 9, in the seventh embodiment, the first branch winding in the U-phase winding is located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core, and includes a conductor smaller than the pole pitch located in the 3 rd layer, the 2 nd layer, the 7 th layer, the 9 th layer, the 14 th layer, the 15 th layer, the 20 th layer, and the 25 th layer of the stator core, i.e., the first branch winding is located at the 3 rd layer and the 2 nd layer in the radial direction of the stator core, and includes 4 conductors with a pitch smaller than the pole pitch; the second branch winding in the U-phase winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises a conductor which is positioned on the 3 rd layer, the 26 th layer and the 31 nd layer of the stator core and is smaller than the polar distance, a conductor which is positioned on the 3 rd layer, the 33 rd layer and the 38 nd layer of the stator core and is smaller than the polar distance, a conductor which is positioned on the 3 rd layer, the 39 th layer and the 2 nd layer, the 44 th layer of the stator core and is smaller than the polar distance, and a conductor which is positioned on the 3 rd layer, the 44 th layer and the 2 nd layer, the 1 st layer of the stator core and is smaller than the polar distance, namely the second branch winding is positioned on the radial 3 rd layer and the 2 nd layer of the stator core and comprises 4 conductors with the pitch which is smaller than the polar distance;

illustratively, as shown in fig. 7 to 9, in embodiment five to embodiment seven, the pitch between two conductors connected in each branch winding in the U-phase winding is a long pitch.

With reference to fig. 7, in the fifth embodiment, specifically, the incoming line end U1 of one branch winding of the U-phase winding is connected to the conductors located in the 5 th and 3 th slots in the 5 th and 4 th layers in the radial direction of the stator core, the pitch between the conductors located in the 3 rd and 2 nd layers in the radial direction of the stator core and equal to the pole pitch is long pitch 7 (i.e. one conductor located in the 3 rd slot in the 4 th layer of the stator core is connected to the two welding ends connected to the other conductor located in the 44 th slot in the 3 rd layer of the stator core, and the pitch between the conductors located in the 44 th slot in the 3 rd layer of the stator core and 2 nd layer 38 th slot is 7), and the pitch between the conductors located in the 31 st and 26 th layers in the radial direction of the stator core and smaller than the pole pitch is long pitch 7 (i.e. one conductor located in the 38 th layer of the 2 nd layer of the stator core is connected to the other conductor located in the 31 st slot in the first layer of the stator core is long pitch is connected to the long pitch 7 th layer of the first layer of the stator core The pitch between two welding ends connected between the parts is 7), and the pitch between two conductors connected with each conductor in fig. 7 is a long pitch, which is not further described herein; with reference to fig. 8, in the sixth embodiment, specifically, the line inlet end U1 of one branch winding of the U-phase winding is connected to the conductors located in the 5 th 8 th and 4 th 14 th slots in the radial direction of the stator core, the pitch between the conductors located in the 3 rd 21 th and 2 nd 26 th slots in the radial direction of the stator core and smaller than the pole pitch is long pitch 7 (i.e. the pitch between the two welding terminals where one conductor is located in the 14 th slot in the 4 th layer of the stator core and connected to the other conductor located in the 21 rd slot in the 3 rd layer of the stator core is 7), and the pitch between the conductors located in the 3 rd 21 th and 2 nd 26 th slots in the radial direction of the stator core and smaller than the pole pitch is long pitch 7 (i.e. the pitch between one conductor located in the 26 nd slot in the first layer of the radial direction of the stator core and larger than the pole pitch is connected to the other conductor located in the first 33 th slot in the first layer of the stator core (i.e. one conductor located in the 26 nd slot in the 2 nd layer of the radial layer of the stator core and connected to the other conductor located in the first 33 th slot of the stator core) The pitch between two welding terminals connected between the parts is 7), and the pitch between two conductors connected with each conductor in fig. 8 is a long pitch, which is not further described herein; with reference to fig. 9, in the seventh embodiment, specifically, the pitch between the conductors that are less than the pole pitch and are connected to the 8 th slot on the 5 th layer and the 13 th slot on the 4 th layer in the radial direction of the stator core at the end U1 of one branch winding of the U-phase winding and the conductors that are less than the pole pitch and are connected to the 20 th slot on the 3 rd layer and the 25 nd slot on the 2 nd layer in the radial direction of the stator core is long pitch 7 (that is, the pitch between the two welding ends that are connected to one conductor and are located in the 20 th slot on the 3 rd layer and the 25 th slot on the 3 nd layer in the radial direction of the stator core is 7), and the pitch between the conductors that are less than the pole pitch and are connected to the 32 th slot on the first layer and the 27 th slot on the 3 rd layer in the radial direction of the stator core at the 25 th layer in the radial direction of the stator core is long pitch 7 (that one conductor and is connected to one conductor and is located in the first slot on the second layer and the 25 th slot on the first layer in the radial direction of the stator core The pitch between the two connected bonding terminals is 7), and the pitch between the two conductors connected with each conductor in fig. 9 is a long pitch, which is not further described herein.

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 can 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, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to 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:

a stator winding including a plurality of phase windings mounted on the stator core, and forming M layers in a radial direction of the stator core, where M is an odd number equal to or greater than 3;

the method is characterized in that: each phase winding is formed by connecting 4 branch windings in parallel, and the inside of a groove connected with the inlet wire end of one branch winding in the phase winding and the inside of a groove connected with the inlet wire end of the other branch winding in the phase winding are positioned at the circumferential interval of 180 degrees of the stator core; the branch winding is positioned on the radial first layer of the stator core and at least comprises a conductor with a pitch larger than a pole pitch and/or a conductor with a pitch smaller than the pole pitch.

2. The stator according to claim 1, wherein each of the branch windings is located at the mth layer and the M-1 layer in the radial direction of the stator core and comprises a plurality of conductors with a pitch equal to the pole pitch, and/or each of the branch windings is located at the mth layer and the M-1 layer in the radial direction of the stator core and comprises a plurality of conductors with a pitch greater than the pole pitch and a plurality of conductors with a pitch smaller than the pole pitch.

3. The stator of claim 2, wherein each branch winding is located at the M-2 and M-3 radial layers of the stator core and comprises a plurality of conductors with a pitch equal to the pole pitch, and/or each branch winding is located at the M-2 and M-3 radial layers of the stator core and comprises a plurality of conductors with a pitch greater than the pole pitch and a plurality of conductors with a pitch less than the pole pitch.

4. The stator according to claim 1, wherein each of the branch windings is located at the mth layer and the M-1 layer in the radial direction of the stator core and comprises a plurality of conductors with a pitch larger than the pole pitch, and/or each of the branch windings is located at the mth layer and the M-1 layer in the radial direction of the stator core and comprises a plurality of conductors with a pitch larger than the pole pitch and a plurality of conductors with a pitch equal to the pole pitch.

5. The stator according to claim 4, wherein each branch winding is located at the M-2 th layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with pitches larger than the pole pitch, and/or each branch winding is located at the M-2 nd layer and the M-3 rd layer in the radial direction of the stator core and comprises a plurality of conductors with pitches larger than the pole pitch and a plurality of conductors with pitches equal to the pole pitch.

6. The stator according to claim 1, wherein each of the branch windings is located at the mth layer and the M-1 layer in the radial direction of the stator core and comprises a plurality of conductors with a pitch smaller than the pole pitch, and/or each of the branch windings is located at the mth layer and the M-1 layer in the radial direction of the stator core and comprises a plurality of conductors with a pitch smaller than the pole pitch and a plurality of conductors with a pitch equal to the pole pitch.

7. The stator of claim 6, wherein each branch winding is located at the M-2 and M-3 radial layers of the stator core and comprises a plurality of conductors with a pitch smaller than the pole pitch, and/or each branch winding is located at the M-2 and M-3 radial layers of the stator core and comprises a plurality of conductors with a pitch smaller than the pole pitch and a plurality of conductors with a pitch equal to the pole pitch.

8. The stator according to claim 3, wherein the pitch between two conductors connected in each of the branch windings is a full pitch.

9. The stator according to claim 5, wherein a pitch between two conductors connected in each of the branch windings is a short pitch.

10. The stator according to claim 7, wherein a pitch between two conductors connected in each of the branch windings is a long pitch.

11. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 10.