CN214543854U

CN214543854U - Motor stator winding, stator and motor

Info

Publication number: CN214543854U
Application number: CN202023025429.6U
Authority: CN
Inventors: 尹文学
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Borgwarner Powertrain Tianjin Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-10-29
Anticipated expiration: 2030-12-16

Abstract

The utility model provides a motor stator winding, stator and motor, including the heterogeneous winding, arbitrary phase winding includes a plurality of coil groups that connect gradually, and a plurality of coil groups set gradually along stator core's circumference; any coil group comprises a first conductor group, a second conductor group, a third conductor group and a fourth conductor group, the first conductor group is arranged on the radial innermost layer or the radial outermost layer of the stator core, the fourth conductor group is arranged on the radial innermost layer or the radial outermost layer of the stator core, and the first conductor group and the fourth conductor group are arranged on the radial different layers of the stator core; the first conductor group and the fourth conductor group are arranged along the radial direction of the stator/iron core, except for the innermost layer and the outermost layer, each layer of the rest stator iron cores is provided with a third conductor group; and each layer where the second conductor group is located along the radial direction of the stator core is provided with the second conductor group. The beneficial effects of the utility model are that winding structure has adopted complete symmetrical structure on magnetic circuit, has eliminated because the loop current problem that asymmetrical structure produced.

Description

Motor stator winding, stator and motor

Technical Field

The utility model belongs to the technical field of the motor, especially, relate to a motor stator winding, stator and motor.

Background

In the prior art, a stator winding comprises various conductors, wherein the various conductors comprise a U-shaped conductor and an S-shaped conductor, and coils of the various conductors penetrate into a slot of a stator core according to a certain arrangement mode to form the required winding of the multi-phase motor. The hairpin coils used in the prior art are various, the manufacturing process is complex, the production cost is high, and the processing efficiency is low.

Disclosure of Invention

In view of the above problems, the present invention provides a motor stator winding, a stator and a motor to solve the above or other former problems existing in the prior art.

In order to solve the technical problem, the utility model discloses a technical scheme is: a motor stator winding comprises multiple phases of windings, wherein any phase of winding comprises a plurality of coil groups which are connected in sequence, and the coil groups are arranged in sequence along the circumferential direction of a stator core;

any coil group comprises a first conductor group, a second conductor group, a third conductor group and a fourth conductor group, wherein conductors in the first conductor group are arranged on the same radial layer of the stator core, conductors in the fourth conductor group are arranged on the same radial layer of the stator core, and the second conductor group and the third conductor group are arranged on two radially adjacent layers of the stator core;

the fourth conductor group, the first conductor group and the second conductor group are arranged adjacently along the circumferential direction of the stator core;

the first conductor group is arranged on the radial innermost layer or the radial outermost layer of the stator core, the fourth conductor group is arranged on the radial innermost layer or the radial outermost layer of the stator core, and the first conductor group and the fourth conductor group are arranged on different radial layers of the stator core;

the first conductor group and the fourth conductor group are arranged along the radial direction of the stator core, and except for the innermost layer and the outermost layer, all the other layers of the stator core are provided with a third conductor group;

and each layer where the second conductor group is located along the radial direction of the stator core is provided with the second conductor group.

Furthermore, in any winding, the number of the coil groups is the same as that of the parallel branches;

any phase winding comprises N branches, the N branches are sequentially connected in parallel along the circumferential direction of the stator core, and N is larger than or equal to 2.

Further, the first conductor set includes a plurality of first conductors, and the first conductors are full-pitch conductors.

Further, the pitch of the first conductors is 9, and the number of the first conductors is 3.

Further, the second conductor set includes a plurality of second conductors, and the second conductors are full-pitch conductors.

Further, the pitch of the second conductors is 9, and the number of the second conductors is 3.

Further, the second conductor set includes a plurality of fifth conductors and at least one sixth conductor, the fifth conductors being long-pitch conductors and the sixth conductors being short-pitch conductors.

Further, the number of the fifth conductors is 2, the number of the sixth conductors is 1, the pitch of the fifth conductors is 10, and the pitch of the sixth conductors is 7.

Further, the second conductor set includes at least one seventh conductor and a plurality of eighth conductors, the seventh conductor being a long-pitch conductor and the eighth conductor being a short-pitch conductor.

Further, the number of the seventh conductors is 1, the number of the eighth conductors is 2, the pitch of the seventh conductors is 11, and the pitch of the eighth conductors is 8.

Further, the third conductor set includes a plurality of third conductors, and the third conductors are full-pitch conductors.

Further, the number of the third conductors is three, and the pitch of the third conductors is 9.

Further, the third conductor set includes a plurality of ninth conductors and at least one tenth conductor, the ninth conductors being long-pitch conductors and the tenth conductors being short-pitch conductors.

Further, the number of the ninth conductors is 2, the number of the tenth conductors is 1, the pitch of the ninth conductors is 10, and the pitch of the tenth conductors is 7.

Further, the third conductor set includes at least one eleventh conductor and a plurality of twelfth conductors, the eleventh conductor being a long-pitch conductor and the twelfth conductor being a short-pitch conductor.

Further, the number of the eleventh conductors is 1, the number of the twelfth conductors is 2, the pitch of the eleventh conductors is 11, and the pitch of the twelfth conductors is 8.

Further, the fourth conductor set includes a plurality of fourth conductors and at least one thirteenth conductor, the fourth conductors being long-pitch conductors, and the thirteenth conductors being short-pitch conductors.

Further, the number of the fourth conductors is 2, the number of the thirteenth conductors is 1, the pitch of the fourth conductors is 10, and the pitch of the thirteenth conductors is 7.

Further, the fourth conductor group includes at least one fourteenth conductor and a plurality of fifteenth conductors, the fourteenth conductor being a long-pitch conductor and the fifteenth conductor being a short-pitch conductor.

Further, the number of fourteenth conductors is 1, the number of fifteenth conductors is 2, the pitch of the fourteenth conductors is 11, and the number of fifteenth conductors is 8.

Furthermore, the welding ends of the conductors of the first conductor group extend in the same direction along the circumferential direction of the stator core, the welding ends of the conductors of the fourth conductor group extend in the same direction along the circumferential direction of the stator core, and the extending direction of the welding ends of the conductors of the first conductor group is opposite to the extending direction of the welding ends of the conductors of the fourth conductor group;

the welding ends of the conductors of the second conductor group and the welding ends of the conductors of the third conductor group extend along the circumferential direction of the stator core, and the extending directions of the welding ends and the welding ends are opposite directions.

Furthermore, the number of radial layers of the stator core is an even number which is more than or equal to 4, and the number of radial layers of the stator core is more than or equal to 2 of parallel branches.

Furthermore, two welding ends of two adjacent layers of conductors in any phase of winding are welded at a full pitch, and the full pitch is 9.

A motor stator comprises a stator core and the motor stator winding, wherein the motor stator winding is arranged on the stator core.

An electric motor comprises the motor stator.

By adopting the technical scheme, the stator winding is provided with a plurality of coil groups, the number of the coil groups in each phase winding is consistent with the number of parallel branches in the phase winding, and the radial layer number of the stator core is selected according to the parallel branches, so that the structure of the stator winding adopts a completely symmetrical structure on a magnetic circuit, the problem of loop current generated by an asymmetrical structure is solved, the hairpin coils forming the stator winding are all U-shaped conductors, the types of the hairpin coils in the stator winding are the same, the manufacturing process is simplified, the production cost is reduced, and the processing efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of a stator of some embodiments of the present invention;

fig. 2 is a schematic diagram of a phase winding according to some embodiments of the present invention;

fig. 3 is a schematic diagram of a fourth conductor set according to some embodiments of the present invention;

fig. 4 is a schematic diagram of a first conductor set according to some embodiments of the present invention;

fig. 5 is a schematic diagram of a second conductor set according to some embodiments of the present invention;

fig. 6 is a schematic diagram of a third conductor set according to some embodiments of the present invention;

fig. 7 is another schematic diagram of a third conductor set according to some embodiments of the invention;

fig. 8 is a schematic diagram of yet another configuration of a third conductor set in accordance with some embodiments of the present invention;

fig. 9 is another schematic diagram of a fourth conductor set according to some embodiments of the present invention;

fig. 10 is another schematic structural view of the second conductor set of some embodiments of the present invention;

fig. 11 is a schematic diagram of yet another configuration of a second conductor set according to some embodiments of the present invention;

fig. 12a is a development view (first part) of a plug end of a phase winding according to a first embodiment of the present invention;

fig. 12b is a development view (second part) of the plug end of a phase winding according to the first embodiment of the present invention;

fig. 13a is a weld end development (first portion) of a phase winding according to a first embodiment of the present invention;

fig. 13b is a weld end development (second part) of a phase winding according to a first embodiment of the present invention;

fig. 14a is a development view (first part) of the plug end of the one-phase winding according to the second embodiment of the present invention;

fig. 14b is a development view (second part) of the plug end of the one-phase winding according to the second embodiment of the present invention;

fig. 14c is a development view (third part) of the plug end of the one-phase winding according to the second embodiment of the present invention;

fig. 14d is a development view (fourth part) of the plug terminal of the one-phase winding according to the second embodiment of the present invention;

fig. 15a is a weld end development view (first part) of a one-phase winding according to a second embodiment of the present invention;

fig. 15b is a weld end development view (second part) of a one-phase winding according to a second embodiment of the present invention;

fig. 15c is a weld end development view (third part) of a one-phase winding according to a second embodiment of the present invention;

fig. 15d is a development view (fourth part) of the welding end of the one-phase winding according to the second embodiment of the present invention;

fig. 16a is a development view (first part) of the plug end of a phase winding according to a fourth embodiment of the present invention;

fig. 16b is a development view (second part) of the plug end of a phase winding according to a fourth embodiment of the present invention;

fig. 16c is a development view of the plug end of a phase winding according to a fourth embodiment of the present invention (third part);

fig. 17a is a weld end development view (first part) of a one-phase winding according to a fourth embodiment of the present invention;

fig. 17b is a weld end development view (second part) of a one-phase winding according to a fourth embodiment of the present invention;

fig. 17c is a weld end development view (third part) of a one-phase winding according to a fourth embodiment of the present invention;

fig. 18 is a schematic diagram of three-branch parallel branch connections in a stator winding according to some embodiments of the present invention;

fig. 19 is a schematic diagram of a two branch parallel connection in a stator winding according to some embodiments of the present invention;

fig. 20 is a schematic diagram of four-branch parallel branch connections in a stator winding according to some embodiments of the present invention.

In the figure:

100-1A, a fourth conductor 100-1B, a thirteenth conductor 100-2A, a fourteenth conductor

100-2B, fifteenth conductor 200-1A, ninth conductor 200-1B, tenth conductor

200-2A, eleventh conductor 200-2B, twelfth conductor 300-1A, fifth conductor

300-1B, a sixth conductor 300-2A, a seventh conductor 300-2B, an eighth conductor

150. First conductor 250, third conductor 350, second conductor

20. Stator core 21, slot

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows the structure diagram of the stator of some embodiments of the present invention, some embodiments relate to a motor stator winding, stator and motor, and this motor stator winding structure adopts complete symmetrical structure on the magnetic circuit, has eliminated because the loop current problem that asymmetrical structure produced, and the conductor of stator winding all adopts U type conductor, simplifies manufacturing procedure, has reduced manufacturing cost, improves machining efficiency.

A stator winding of an electric machine, comprising a multi-phase stator winding, as shown in fig. 2-17c, which is formed by sequentially arranging a plurality of hairpin coils along the circumferential direction of a stator core 20 according to a certain arrangement rule, specifically,

any phase winding comprises N branches, the N branches are sequentially connected in parallel along the circumferential direction of the stator core 20, wherein N is more than or equal to 2, and the number of the parallel branches is selected according to actual requirements;

any phase winding includes a plurality of coil groups connected in sequence, and the plurality of coil groups are arranged in sequence along the circumferential direction of the stator core 20; in any stator winding, the number of the coil groups is the same as that of the parallel branches, namely, the number of the coil groups is more than or equal to 2;

any coil group comprises a first conductor group, a second conductor group, a third conductor group and a fourth conductor group, wherein conductors in the first conductor group are arranged on the same radial layer of the stator core 20, conductors in the fourth conductor group are arranged on the same radial layer of the stator core 20, and the second conductor group and the third conductor group are arranged on two radially adjacent layers of the stator core 20; along the circumferential direction of the stator core 20, the fourth conductor group, the first conductor group and the second conductor group are adjacently arranged, the fourth conductor group, the first conductor group and the second conductor group are sequentially adjacently arranged, the first conductor group, the second conductor group and the fourth conductor group are sequentially adjacently arranged, or the second conductor group, the fourth conductor group and the first conductor group are sequentially adjacently arranged, and are selected according to actual requirements; wherein, the quantity of second conductor group is a set of at least, can be the multiunit, and multiunit second conductor group sets gradually along stator core 20's circumference, and every a set of second conductor group is located a radial direction of stator core, and a plurality of second conductor group are located a plurality of radial directions of stator core, if, the quantity of second conductor group is two sets of, then, fourth conductor group, first conductor group, second conductor group are adjacent setting gradually.

The first conductor group is arranged on the radial innermost layer or the radial outermost layer of the stator core 20, the fourth conductor group is arranged on the radial innermost layer or the radial outermost layer of the stator core 20, the first conductor group and the fourth conductor group are arranged on the radial different layers of the stator core 20, the first conductor group is arranged on the radial innermost layer of the stator core 20, the fourth conductor group is arranged on the radial outermost layer of the stator core 20, or the first conductor group is arranged on the radial outermost layer of the stator core 20, the first conductor group is arranged on the radial innermost layer of the stator core 20 and is selected according to actual requirements;

the first conductor group and the fourth conductor group are located along the radial direction of the stator core 20, except for the innermost layer and the outermost layer, each layer of the rest stator core 20 is provided with a third conductor group, such as: the first conductor group is arranged on the outermost layer, and the third conductor group is arranged on each adjacent two layers except the innermost layer of other layers along the radial direction of the stator core 20 where the first conductor group is arranged; the fourth conductor group is disposed on the innermost layer, and the third conductor group is disposed on each adjacent two layers except the outermost layer of other layers in the radial direction of the stator core 20 where the fourth conductor group is located.

Each layer along the radial direction of the stator core 20 where the second conductor group is located is provided with the second conductor group, that is, each two adjacent layers in each layer along the radial direction of the stator core 20 where the second conductor group is located are provided with the second conductor group, and all layers in the radial direction of the stator core 20 are fully covered with the second conductor group.

As shown in fig. 3 to 11, the conductors in the first conductor set, the second conductor set, the third conductor set and the fourth conductor set are all hairpin coils, and the hairpin coils are all U-shaped conductors. The U-shaped conductor is provided with two welding end parts and used for being in welding connection with the hairpin coils of the adjacent layers, two groove inner parts and one plug wire end part are arranged, one ends of the two groove inner parts are respectively connected with the two welding end parts, the other ends of the two groove inner parts are respectively connected with the plug wire end part to form a U-shaped conductor structure, the U-shaped conductors with similar structures and different pitches are selected according to the preparation requirement of the stator winding, and the structure of a first conductor group, a second conductor group, a third conductor group and a fourth conductor group is constructed, so that the stator winding is completely symmetrical in structure on a magnetic circuit. The two welding ends of the U-shaped conductor may extend along the circumferential direction of the stator core 20, and the extending directions extend in opposite directions, that is, the extending directions are opposite and close to each other, or the extending directions of the two welding ends extend in opposite directions, that is, the extending directions are opposite and far away from each other, or the extending directions of the two welding ends extend in the same direction, and are selected according to actual requirements.

Here, the weld ends of the conductors of the first conductor group extend in the same direction along the circumferential direction of the stator core 20, the weld ends of the conductors of the fourth conductor group extend in the same direction along the circumferential direction of the stator core 20, and the weld ends of the conductors of the first conductor group extend in a direction opposite to the extending direction of the weld ends of the conductors of the fourth conductor group, one extends leftward and one extends rightward; the weld ends of the conductors of the second conductor set and the weld ends of the conductors of the third conductor set extend along the circumferential direction of the stator core 20, and the extending directions are opposite to each other and are away from each other.

The number of radial layers of the stator core 20 is an even number greater than or equal to 4, and the number of radial layers of the stator core 20 is greater than or equal to 2, when the number of parallel branches is 2, the minimum value of the number of radial layers of the stator core 20 is 4, when the number of parallel branches is 3, the minimum value of the number of radial layers of the stator core 20 is 6, and so on.

In any phase winding, the welding ends of the two conductors of the two adjacent layers are welded at a full pitch, preferably, 9, in the radial direction of the stator core 20.

As shown in fig. 18 to 20, in the multi-phase winding, any one of the parallel branches of the phase windings is star-connected, and the multi-phase winding has the same number of connection points as the number of phases, for example, when each phase winding has three parallel branches, the U1 terminal of the U-phase, the V1 terminal of the V-phase and the W1 terminal of the W-phase are connected together, the U2 terminal of the U-phase, the V2 terminal of the V-phase and the W2 terminal of the W-phase are connected together, and the U3 terminal of the U-phase, the V3 terminal of the V-phase and the W3 terminal of the W-phase are connected together; similarly, when each phase winding in the three-phase winding has four parallel branches, the U1 end of the U phase, the V1 end of the V phase and the W1 end of the W phase are connected together, the U2 end of the U phase, the V2 end of the V phase and the W2 end of the W phase are connected together, the U3 end of the U phase, the V3 end of the V phase and the W3 end of the W phase are connected together, and the U4 end of the U phase, the V4 end of the V phase and the W4 end of the W phase are connected together.

As shown in fig. 4, the first conductor group includes a plurality of first conductors 150, the first conductors 150 are full-pitch conductors, preferably, the pitch of the first conductors 150 is 9, and the number of the first conductors 150 is 3, that is, the first conductor group includes three first conductors 150 with the same structure, the three first conductors 150 are disposed in the same radial layer of the stator core 20, and the inside of the slots on the same side of the three first conductors 150 are located in three adjacent slots of the layer.

The second conductor set has a variety of configurations: as shown in fig. 5, the second conductor group includes a plurality of second conductors 350, the second conductors 350 are full-pitch conductors, preferably, the pitch of the second conductors 350 is 9, and the number of the second conductors 350 is 3, that is, the second conductor group includes three second conductors 350 of the same structure, the three second conductors 350 are disposed in two adjacent layers of the stator core 20 in the radial direction, and the inside of the slots on the same side of the three second conductors 350 are located in three slots on one layer of the stator core 20 in the radial direction, and the inside of the slots on the other side of the three second conductors 350 are located in three slots on one layer adjacent to the layer.

Alternatively, as shown in fig. 11, the second conductor set includes a plurality of fifth conductors 300-1A and at least one sixth conductor 300-1B, the fifth conductor 300-1A is a long-pitch conductor, the sixth conductor 300-1B is a short-pitch conductor, preferably, the number of the fifth conductors 300-1A is 2, the number of the sixth conductors 300-1B is 1, the pitch of the fifth conductor 300-1A is 10, the pitch of the sixth conductor 300-1B is 7, two fifth conductors 300-1A are arranged around the outside of the sixth conductor 300-1B, two fifth conductors 300-1A and one sixth conductor 300-1B are arranged in two adjacent layers in the radial direction of the stator core 20, and the inside of one-side slots of the two fifth conductors 300-1A and the inside of one-side slots of the sixth conductor 300-1B are arranged in three slots of one layer in the radial direction of the stator core 20, the other-side slot interiors of the two fifth conductors 300-1A and the other-side slot interiors of the sixth conductors 300-1B are located in three slots of one layer of the stator core 20 that is radially adjacent to that layer.

Alternatively, as shown in fig. 10, the second conductor set includes at least one seventh conductor 300-2A and a plurality of eighth conductors 300-2B, the seventh conductor 300-2A is a long-pitch conductor, the eighth conductors 300-2B are short-pitch conductors, preferably, the number of the seventh conductors 300-2A is 1, the number of the eighth conductors 300-2B is 2, the pitch of the seventh conductor 300-2A is 11, the pitch of the eighth conductors 300-2B is 8, one seventh conductor 300-2A is arranged around the outside of two eighth conductors 300-2B, two eighth conductors 300-2B and one seventh conductor 300-2A are both located in two adjacent layers of the stator core 20 in the radial direction, and the inside of one-side slots of the two eighth conductors 300-2B and the inside of one-side slots of the seventh conductors 300-2A are located in three slots of one layer of the stator core 20 in the radial direction, the other-side slot interiors of the two eighth conductors 300-2B and the other-side slot interiors of the seventh conductors 300-2A are located in three slots of a layer of the stator core 20 that is radially adjacent to that layer.

The third conductor set has a variety of configurations: as shown in fig. 6, the third conductor group includes a plurality of third conductors 250, the third conductors 250 are full-pitch conductors, preferably, the number of the third conductors 250 is three, and the pitch of the third conductors 250 is 9, that is, the third conductor group includes three third conductors 250 of the same structure, the three third conductors 250 are disposed in two adjacent layers of the stator core 20 in the radial direction, and the inside of the slot on the same side of the three third conductors 250 is located in three slots in one layer of the stator core 20 in the radial direction, and the inside of the slot on the other side of the three third conductors 250 is located in three slots in one layer adjacent to the layer.

Alternatively, as shown in fig. 7, the third conductor group includes a plurality of ninth conductors 200-1A and at least one tenth conductor 200-1B, the ninth conductors 200-1A are long-pitch conductors, the tenth conductors 200-1B are short-pitch conductors, preferably, the number of the ninth conductors 200-1A is 2, the number of the tenth conductors 200-1B is 1, the pitch of the ninth conductors 200-1A is 10, the pitch of the tenth conductors 200-1B is 7, two ninth conductors 200-1A are arranged around the outside of the tenth conductors 200-1B, two ninth conductors 200-1A and one tenth conductor 200-1B are both located in two adjacent layers of the stator core 20 in the radial direction, and the inside of one side slot of the two ninth conductors 200-1A and the inside of one side slot of the tenth conductor 200-1B are located in three slots of one layer of the stator core 20 in the radial direction, the other-side slot interiors of the two ninth conductors 200-1A and the other-side slot interiors of the tenth conductors 200-1B are located in three slots of a layer of the stator core 20 radially adjacent to that layer.

Alternatively, as shown in fig. 8, the third conductor set includes at least one eleventh conductor 200-2A and a plurality of twelfth conductors 200-2B, the eleventh conductor 200-2A is a long-pitch conductor, the twelfth conductor 200-2B is a short-pitch conductor, preferably, the number of the eleventh conductors 200-2A is 1, the number of the twelfth conductors 200-2B is 2, the pitch of the eleventh conductor 200-2A is 11, the pitch of the twelfth conductor 200-2B is 8, one eleventh conductor 200-2A is arranged around the outside of two twelfth conductors 200-2B, the two twelfth conductors 200-2B and one eleventh conductor 200-2A are both located in two adjacent layers of the stator core 20 in the radial direction, and the inside of one side slot of the two twelfth conductors 200-2B and the inside of one side slot of the eleventh conductor 200-2A are located in one layer of the stator core 20 in the radial direction Of the three slots, the other-side slot interiors of the two twelfth conductors 200-2B and the other-side slot interiors of the eleventh conductor 200-2A are located in three slots of one layer of the stator core 20 that is radially adjacent to that layer.

The fourth conductor set has a variety of configurations: as shown in fig. 3, the fourth conductor set includes a plurality of fourth conductors 100-1A and at least one thirteenth conductor 100-1B, the fourth conductor 100-1A is a long-pitch conductor, the thirteenth conductor 100-1B is a short-pitch conductor, preferably, the number of the fourth conductors 100-1A is 2, the number of the thirteenth conductors 100-1B is 1, the pitch of the fourth conductor 100-1A is 10, the pitch of the thirteenth conductor 100-1B is 7, two fourth conductors 100-1A are arranged around the outside of one thirteenth conductor 100-1B, two fourth conductors 100-1A and one thirteenth conductor 100-1B are both located in the same layer in the radial direction of the stator core 20, and one side slot interiors of the two fourth conductors 100-1A and one side slot interiors of the thirteenth conductor 100-1B are located in three slots of the layer of the stator core 20, the other side slot interiors of the two fourth conductors 100-1A and the other side slot interiors of the thirteenth conductor 100-1B are located in the other three slots of the layer of the stator core 20.

Alternatively, as shown in fig. 9, the fourth conductor group includes at least one fourteenth conductor 100-2A and a plurality of fifteenth conductors 100-2B, the fourteenth conductor 100-2A is a long-pitch conductor, the fifteenth conductor 100-2B is a short-pitch conductor, preferably, the number of fourteenth conductors 100-2A is 1, the number of fifteenth conductors 100-2B is 2, the pitch of the fourteenth conductor 100-2A is 11, the number of fifteenth conductors 100-2B is 8, one fourteenth conductor 100-2A is arranged around the outside of two fifteenth conductors 100-2B, the two fifteenth conductors 100-2B and one fourteenth conductor 100-2A are both located in the same layer of the stator core 20 in the radial direction, and one side slot inner portions of the two fifteenth conductors 100-2B and one side slot inner portion of the fourteenth conductor 100-2A are located in three slots of the layer of the stator core 20, the other side slot interiors of the two fifteenth conductors 100-2B and the other side slot interior of the fourteenth conductor 100-2A are located in the other three slots of the layer of the stator core 20.

A motor stator comprises a stator core 20 and the motor stator winding, wherein the motor stator winding is arranged on the stator core 20.

An electric motor comprises the motor stator.

The following is a detailed description of some specific embodiments.

Example one

In the present embodiment, the stator winding is mounted on the stator core 20, the stator core 20 has a plurality of slots 21, and the plurality of slots 21 are formed on a radially inner surface of the stator core 20 and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core 20; the stator winding is three-phase, a plurality of hairpin coils in each phase winding are arranged along the circumferential direction of the stator core 20, the welding ends of the hairpin coils of adjacent layers are welded and connected to form two parallel branches, and the branch windings in the three-phase stator winding are sequentially connected in parallel along the circumferential direction of the stator core 20. The number of slots per pole per phase is equal to or greater than 2, in this embodiment 3 slots per pole per phase, the rotor has 6 poles and this is true for each phase of the stator winding, and the number of slots of stator core 20 is 54.

The stator core 20 has a tooth portion defined by two adjacent slots, the stator core 20 has two end faces in the axial direction of the stator core 20 formed by stacking a plurality of annular magnetic steel plates, and other conventional metal plates may be used instead of the magnetic steel plates.

In the present embodiment, as shown in fig. 12a to 13b, the number of radial layers of the stator core 20 is 4. Each phase winding of the stator winding is provided with two groups of coil groups, the two groups of coil groups are sequentially arranged along the circumferential direction of the stator core 20, each group of coil groups comprises a first conductor group, a fourth conductor group, two third conductor groups and two second conductor groups, namely, each phase winding of the stator winding comprises two first conductor groups, two fourth conductor groups, four second conductor groups and four third conductor groups, the first conductor groups are arranged on the fourth layer of the stator core 20, the fourth conductor groups are arranged on the first layer of the stator core 20, two adjacent layers of the stator core 20 in the radial direction where the first conductor groups are arranged are provided with the third conductor groups, namely, the third conductor groups are arranged on the second layer and the third layer of the stator core 20; two adjacent layers in the radial direction of the stator core 20 where the fourth conductor group is located are provided with a third conductor group, that is, the third conductor group is arranged on the second layer and the third layer of the stator core 20; the second conductor group is disposed adjacent to the first conductor group in the circumferential direction of the stator core 20, and the second conductor group is disposed in the first layer, the second layer, the third layer, and the fourth layer.

Specifically, as shown in fig. 12a, 12b and 4, the first conductor group includes 3 first conductors 150, the first conductors 150 are full-pitch conductors, preferably, the pitch of the first conductors 150 is 9, three first conductors 150 are all disposed on the fourth layer of the stator core 20, two slots of the first conductor 150 are located inside 10 slots and 19 slots of the fourth layer of the stator core 20, two slots of the second conductor 150 are located inside 11 slots and 20 slots of the fourth layer of the stator core 20, and two slots of the third conductor 150 are located inside 12 slots and 21 slots of the fourth layer of the stator core 20.

As shown in fig. 12a, 12b and 5, the second conductor group includes 3 second conductors 350, the second conductors 350 are full-pitch conductors, preferably, the pitch of the second conductors 350 is 9, three second conductors 350 are all provided on the first layer, the second layer or the third layer and the fourth layer of the stator core 20, two slots of the first second conductor 350 are located inside 19 slots of the first layer and the third layer of the

stator core

20 and 28 slots of the second layer and the fourth layer, two slots of the second conductor 350 are located inside 20 slots of the first layer and the third layer of the

stator core

20 and 29 slots of the second layer and the fourth layer, and two slots of the third second conductor 350 are located inside 21 slots of the first layer and the third layer of the

stator core

20 and 30 slots of the second layer and the fourth layer.

As shown in fig. 12a, 12b and 6, the third conductor group includes 3 third conductors 250, the third conductors 250 are full-pitch conductors, preferably, the pitch of the third conductors 250 is 9, three third conductors 250 are all provided on the second layer and the third layer of the stator core 20, two slots of the first third conductor 250 are positioned in 1 slot of the third layer and 10 slots of the second layer of the stator core 20, two slots of the second third conductor 250 are positioned in 2 slots of the third layer and 11 slots of the second layer of the stator core 20, two slots of the third conductor 250 are positioned in 3 slots of the third layer and 12 slots of the second layer of the stator core 20, and two slots of the first third conductor 250 are positioned in 10 slots of the third layer and 19 slots of the second layer of the stator core 20, two slots of the second third conductor 250 are positioned in 11 slots of the third layer and 20 slots of the second layer of the stator core 20, the two slots of the third conductor 250 are located inside the 12 slots of the third layer and the 21 slots of the second layer of the stator core 20.

As shown in figures 12a and 12b, 3, the fourth conductor group includes 2 fourth conductors 100-1A and 1 thirteenth conductor 100-1B, the fourth conductor 100-1A is a long-pitch conductor, preferably, the pitch of the fourth conductor 100-1A is 10, the thirteenth conductor 100-1B is a short-pitch conductor, preferably, the pitch of the thirteenth conductor 100-1B is 7, 2 fourth conductors 100-1A and 1 thirteenth conductor 100-1B are disposed in the first layer of the stator core 20, 1 slot and 11 slots of the first layer of the stator core 20 are disposed in two slots of the first fourth conductor 100-1A, 2 slots and 12 slots of the first layer of the stator core 20 are disposed in two slots of the second fourth conductor 100-1A, and 3 slots and 10 slots of the first layer of the stator core 20 are disposed in two slots of the thirteenth conductor 100-1B.

As shown in fig. 13a-13b, at the welding ends of the stator winding, the two welding ends of the two hairpin coils of the adjacent layers are welded at a full pitch, preferably, 9. In the present embodiment, each phase winding has two parallel branches, including a lead segment U1, a lead terminal U3, a lead segment U2, and a lead terminal U4.

Example two

In the present embodiment, the stator winding is mounted on the stator core 20, the stator core 20 has a plurality of slots 21, and the plurality of slots 21 are formed on a radially inner surface of the stator core 20 and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core 20; the stator winding is three-phase, a plurality of hairpin coils in each phase winding are arranged along the circumferential direction of the stator core 20, the welding ends of the hairpin coils of adjacent layers are welded and connected to form four parallel branches, and the branch windings in the three-phase stator winding are sequentially connected in parallel along the circumferential direction of the stator core 20. The number of slots per pole per phase is 2 or more, and in this embodiment, the number of slots per pole per phase is 3, the rotor has 12 poles and this is true for each phase of the stator winding, and the number of slots of the stator core 20 is 108.

As shown in fig. 14a to 15d, in the present embodiment, the number of radial layers of the stator core 20 is 8. Each phase winding of the stator winding has four groups of coil groups, each group of coil groups is sequentially arranged along the circumferential direction of the stator core 20, each group of coil groups comprises a first conductor group, a fourth conductor group, six third conductor groups and four second conductor groups, namely, each phase winding of the stator winding comprises 4 first conductor groups, 4 fourth conductor groups, 16 second conductor groups and 24 third conductor groups, the first conductor groups are arranged on the eighth layer of the stator core 20, the fourth conductor groups are arranged on the first layer of the stator core 20, two adjacent layers of the stator core 20 in the radial direction where the first conductor groups are arranged are provided with the third conductor groups, namely, the third conductor groups are arranged on the second layer and the third layer, the fourth layer and the fifth layer, the sixth layer and the seventh layer of the stator core 20; the adjacent two layers in the radial direction of the stator core 20 where the fourth conductor group is located are provided with a third conductor group, that is, the third conductor group is arranged on the second layer and the third layer, the fourth layer and the fifth layer, and the sixth layer and the seventh layer of the stator core 20; the second conductor group and the first conductor group are adjacently arranged along the circumferential direction of the stator core 20, and the second conductor group is arranged on the first layer, the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer, the seventh layer and the eighth layer.

Specifically, as shown in fig. 14a to 14d and 4, the first conductor group includes 3 first conductors 150, the first conductors 150 are full-pitch conductors, preferably, the pitch of the first conductors 150 is 9, three first conductors 150 are all disposed on the eighth layer of the stator core 20, two slots of the first conductor 150 are located inside 10 slots and 19 slots of the eighth layer of the stator core 20, two slots of the second first conductor 150 are located inside 11 slots and 20 slots of the eighth layer of the stator core 20, and two slots of the third first conductor 150 are located inside 12 slots and 21 slots of the eighth layer of the stator core 20.

As shown in fig. 14a to 14d and 5, the second conductor group includes 3 second conductors 350, the second conductors 350 are full-pitch conductors, preferably, the pitch of the second conductors 350 is 9, three second conductors 350 are all disposed on the first layer, the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer, the seventh layer and the eighth layer of the stator core 20, two slots of the first second conductor 350 are located inside 19 slots of the first layer, the third layer, the fifth layer and the seventh layer of the

stator core

20, 28 slots of the second layer, the fourth layer, the sixth layer and the eighth layer, two slots of the second conductor 350 are located inside 20 slots of the first layer, the third layer, the fifth layer and the seventh layer of the

stator core

20, 29 slots of the second layer, the fourth layer, the sixth layer and the eighth layer, two slots of the third second conductor 350 are located inside the first layer, the third layer of the

stator core

20, 21 grooves of the fifth layer and the seventh layer, and 30 grooves of the second layer, the fourth layer, the sixth layer and the eighth layer.

As shown in fig. 14a to 14d and 7, the third conductor group includes 2 ninth conductors 200-1A and 1 tenth conductor 200-1B, the ninth conductor 200-1A is a long-pitch conductor, preferably, the pitch of the ninth conductor 200-1A is 10, the tenth conductor 200-1B is a short-pitch conductor, preferably, the pitch of the tenth conductor 200-1B is 7, the 2 ninth conductors 200-1A and 1 tenth conductor 200-1B are disposed on the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer and the seventh layer of the stator core 20, the two slots of the first ninth conductor 200-1A are disposed on the third layer, the fifth layer, the 1 slot and the second layer of the seventh layer, the 11 slots of the fourth layer and the sixth layer of the stator core 20, the two slots of the second ninth conductor 200-1A are disposed on the third layer, the fifth layer, the 11 slots of the seventh layer of the stator core 20, the two slots of the second ninth conductor 200-1A are disposed on the third layer, the tenth conductor 200-1B, The two slot interiors of the tenth conductor 200-1B are positioned at the third layer, the fifth layer, the 3 slot and the second layer of the seventh layer, the fourth layer and the 10 slot of the sixth layer of the stator core 20, the two slot interiors of the first ninth conductor 200-1A are positioned at the third layer, the fifth layer, the 10 slot and the second layer of the seventh layer, the fourth layer and the 20 slot of the sixth layer of the stator core 20, the two slot interiors of the second ninth conductor 200-1A are positioned at the third layer, the fifth layer, the 11 slot and the second layer of the seventh layer, the fourth layer and the 21 slot of the sixth layer of the stator core 20, and the two slot interiors of the tenth conductor 200-1B are positioned at the third layer, the fifth layer, the 12 slot and the second layer of the seventh layer, the fourth layer and the 19 slot of the sixth layer of the stator core 20.

As shown in figures 14a-14d, 3, the fourth conductor group includes 2 fourth conductors 100-1A and 1 thirteenth conductor 100-1B, the fourth conductor 100-1A is a long-pitch conductor, preferably, the pitch of the fourth conductor 100-1A is 10, the thirteenth conductor 100-1B is a short-pitch conductor, preferably, the pitch of the thirteenth conductor 100-1B is 7, 2 fourth conductors 100-1A and 1 thirteenth conductor 100-1B are disposed in the first layer of the stator core 20, 1 slot and 11 slots of the first layer of the stator core 20 are disposed in two slots of the first fourth conductor 100-1A, 2 slots and 12 slots of the first layer of the stator core 20 are disposed in two slots of the second fourth conductor 100-1A, and 3 slots and 10 slots of the first layer of the stator core 20 are disposed in two slots of the thirteenth conductor 100-1B.

As shown in fig. 15a to 15d, at the welding ends of the stator winding, the two welding ends of the two hairpin coils of the adjacent layers are welded at a full pitch, preferably, 9. In the present embodiment, each phase winding has four parallel branches, including a lead segment U1, a lead terminal U2, a lead segment U3, a lead terminal U4, a lead segment U5, a lead terminal U6, a lead segment U7, and a lead terminal U8.

EXAMPLE III

In this embodiment, compared with the embodiment, the structure of the third conductor set is different, and the other structures are the same.

In the present embodiment, as shown in fig. 8, the third conductor group includes 1 eleventh conductor 200-2A and 2 twelfth conductors 200-2B, the eleventh conductor 200-2A is a long-pitch conductor, preferably, the pitch of the eleventh conductor 200-2A is 11, the twelfth conductor 200-2B is a short-pitch conductor, preferably, the pitch of the twelfth conductor 200-2B is 8, 1 eleventh conductor 200-2A and 2 twelfth conductors 200-2B are respectively disposed at the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer and the seventh layer of the stator core 20, the two slots of the eleventh conductor 200-2A are disposed at the third layer, the fifth layer, the 1 slot and the second layer of the seventh layer, the fourth layer, the 12 slots of the sixth layer, the two slots of the first twelfth conductor 200-2B are disposed at the third layer, the third layer of the stator core 20, and the two slots of the first twelfth conductor 200-2B are disposed at the third layer of the stator core 20, 2 slots of the fifth layer and the seventh layer and 10 slots of the second layer, the fourth layer and the sixth layer, two slots of the second twelfth conductor 200-2B are positioned in the third layer, the fifth layer and the seventh layer of 3 slots and 11 slots of the second layer, the fourth layer and the sixth layer of the stator core 20, and the two slots of the eleventh conductor 200-2A are internally located in the 10 slots of the third layer, the fifth layer and the seventh layer and the 21 slots of the second layer, the fourth layer and the sixth layer of the stator core 20, the two slots of the first twelfth conductor 200-2B are internally located in the 11 slots of the third layer, the fifth layer and the seventh layer and the 19 slots of the second layer, the fourth layer and the sixth layer of the stator core 20, and the two slots of the second twelfth conductor 200-2B are internally located in the 12 slots of the third layer, the fifth layer and the seventh layer and the 20 slots of the second layer, the fourth layer and the sixth layer of the stator core 20.

Example four

In the present embodiment, the stator winding is mounted on the stator core 20, the stator core 20 has a plurality of slots 21, and the plurality of slots 21 are formed on a radially inner surface of the stator core 20 and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core 20; the stator winding is three-phase, a plurality of hairpin coils in each phase winding are arranged along the circumferential direction of the stator core 20, the welding ends of the hairpin coils of adjacent layers are welded and connected to form three parallel branches, and the branch windings in the three-phase stator winding are sequentially connected in parallel along the circumferential direction of the stator core 20. The number of slots per pole per phase is 2 or more, and in this embodiment, the number of slots per pole per phase is 3, the rotor has 12 poles and this is true for each phase of the stator winding, and the number of slots of the stator core 20 is 108.

In the present embodiment, as shown in fig. 16a to 17c, the number of radial layers of the stator core 20 is 8. Each phase winding of the stator winding is provided with three groups of coil groups, the three groups of coil groups are sequentially arranged along the circumferential direction of the stator core 20, each group of coil groups comprises a first conductor group, a fourth conductor group, six third conductor groups and eight second conductor groups, namely, each phase winding of the stator winding comprises 3 first conductor groups, 3 fourth conductor groups, 24 second conductor groups and 18 third conductor groups, the first conductor groups are arranged on the eighth layer of the stator core 20, the fourth conductor groups are arranged on the first layer of the stator core 20, two adjacent layers of the stator core 20 in the radial direction where the first conductor groups are arranged are provided with the third conductor groups, namely, the third conductor groups are arranged on the second layer and the third layer, the fourth layer and the fifth layer, the sixth layer and the seventh layer of the stator core 20; the adjacent two layers in the radial direction of the stator core 20 where the fourth conductor group is located are provided with a third conductor group, that is, the third conductor group is arranged on the second layer and the third layer, the fourth layer and the fifth layer, and the sixth layer and the seventh layer of the stator core 20; the second conductor group and the first conductor group are adjacently arranged along the circumferential direction of the stator core 20, and the second conductor group is arranged on the first layer, the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer, the seventh layer and the eighth layer.

Specifically, as shown in fig. 16a to 16c and 4, the first conductor group includes 3 first conductors 150, the first conductors 150 are full-pitch conductors, preferably, the pitch of the first conductors 150 is 9, three first conductors 150 are all disposed on the eighth layer of the stator core 20, two slots of the first conductor 150 are located inside 10 slots and 19 slots of the eighth layer of the stator core 20, two slots of the second first conductor 150 are located inside 11 slots and 20 slots of the eighth layer of the stator core 20, and two slots of the third first conductor 150 are located inside 12 slots and 21 slots of the eighth layer of the stator core 20.

As shown in fig. 16a to 16c and 11, the second conductor group includes 2 fifth conductors 300-1A and 1 sixth conductor 300-1B, the fifth conductor 300-1A is a long-pitch conductor, preferably, the pitch of the fifth conductor 300-1A is 10, the sixth conductor 300-1B is a short-pitch conductor, preferably, the pitch of the sixth conductor 300-1B is 7, the 2 fifth conductors 300-1A and 1 sixth conductor 300-1B are respectively disposed in the first, second, third, fourth, fifth, sixth, seventh and eighth layers of the stator core 20, the two slots of the first fifth conductor 300-1A are disposed in the first, third, fifth and seventh slots, the second, fourth, sixth and eighth slots of the stator core 20, and the two slots of the second fifth conductor 300-1A are disposed in the first, third, fifth and seventh slots of the stator core 20, and the slots of the second, fifth and seventh slots of the stator core 20 are disposed in the second layer, the fourth, sixth slots of the second conductor 300-1A are disposed in the first layer of the stator core 20, 20 slots of the third layer, the fifth layer and the seventh layer, 30 slots of the second layer, the fourth layer, the sixth layer and the eighth layer, and 28 slots of the first layer, the third layer, the fifth layer and the seventh layer, and the second layer, the fourth layer, the sixth layer and the eighth layer of the stator core 20 are positioned inside two slots of the sixth conductor 300-1B; and two slots of the first fifth conductor 300-1A are positioned inside the 28 slots of the first, third, fifth and seventh layers, the 38 slots of the second, fourth, sixth and eighth layers of the stator core 20, two slots of the second fifth conductor 300-1A are positioned inside the 29 slots of the first, third, fifth and seventh layers, the 39 slots of the second, fourth, sixth and eighth layers of the stator core 20, and two slots of the sixth conductor 300-1B are positioned inside the 30 slots of the first, third, fifth and seventh layers, the 37 slots of the second, fourth, sixth and eighth layers of the stator core 20. In the present embodiment, the second conductor set has two sets, located in two adjacent radial directions of the stator core 20.

As shown in fig. 16a to 16c and 7, the third conductor group includes 2 ninth conductors 200-1A and 1 tenth conductor 200-1B, the ninth conductor 200-1A is a long-pitch conductor, preferably, the pitch of the ninth conductor 200-1A is 10, the tenth conductor 200-1B is a short-pitch conductor, preferably, the pitch of the tenth conductor 200-1B is 7, the 2 ninth conductors 200-1A and 1 tenth conductor 200-1B are disposed on the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer and the seventh layer of the stator core 20, the two slots of the first ninth conductor 200-1A are disposed on the third layer, the fifth layer, the 1 slot and the second layer of the seventh layer, the 11 slots of the fourth layer and the sixth layer of the stator core 20, the two slots of the second ninth conductor 200-1A are disposed on the third layer, the fifth layer, the 11 slots of the seventh layer of the stator core 20, the two slots of the second ninth conductor 200-1A are disposed on the third layer, the tenth conductor 200-1B, The two slot interiors of the tenth conductor 200-1B are positioned at the third layer, the fifth layer, the 3 slot and the second layer of the seventh layer, the fourth layer and the 10 slot of the sixth layer of the stator core 20, the two slot interiors of the first ninth conductor 200-1A are positioned at the third layer, the fifth layer, the 10 slot and the second layer of the seventh layer, the fourth layer and the 20 slot of the sixth layer of the stator core 20, the two slot interiors of the second ninth conductor 200-1A are positioned at the third layer, the fifth layer, the 11 slot and the second layer of the seventh layer, the fourth layer and the 21 slot of the sixth layer of the stator core 20, and the two slot interiors of the tenth conductor 200-1B are positioned at the third layer, the fifth layer, the 12 slot and the second layer of the seventh layer, the fourth layer and the 19 slot of the sixth layer of the stator core 20.

As shown in figures 16a-16c, as shown in fig. 9, the fourth conductor group includes 1 fourteenth conductor 100-2A and 2 fifteenth conductors 100-2B, the fourteenth conductor 100-2A is a long-pitch conductor, preferably, the pitch of the fourth conductor 100-1A is 11, the fifteenth conductor 100-2B is a short-pitch conductor, preferably, the pitch of the thirteenth conductor 100-1B is 8, 1 fourteenth conductor 100-2A and 2 fifteenth conductors 100-2B are both provided in the first layer of the stator core 20, two slots of the fourteenth conductor 100-2A are located in 1 slot and 12 slots of the first layer of the stator core 20, two slots of the first fifteenth conductor 100-2B are located in 2 slots and 10 slots of the first layer of the stator core 20, and two slots of the second fifteenth conductor 100-2B are located in 3 slots and 11 slots of the first layer of the stator core 20.

As shown in fig. 17a to 17c, at the welding ends of the stator winding, the two welding ends of the two hairpin coils of the adjacent layers are welded at a full pitch, preferably, 9. In the present embodiment, each phase winding has four parallel branches, including a lead segment U1, a lead terminal U2, a lead segment U3, a lead terminal U4, a lead segment U5, and a lead terminal U6.

EXAMPLE five

In this embodiment, the structure of the second conductor set is different, and other structures are the same.

As shown in fig. 10, the second conductor group includes 1 seventh conductor 300-2A and 2 eighth conductors 300-2B, the seventh conductor 300-2A is a long-pitch conductor, preferably, the pitch of the seventh conductor 300-2A is 11, the eighth conductor 300-2B is a short-pitch conductor, preferably, the pitch of the eighth conductor 300-2B is 8, 1 seventh conductor 300-2A and 2 eighth conductors 300-2B are respectively provided in the first layer, the second layer, the third layer, the fourth layer, the fifth layer, the sixth layer, the seventh layer and the eighth layer of the stator core 20, two slots of the seventh conductor 300-2A are positioned in the first layer, the third layer, the fifth layer and the seventh layer of the stator core 20, 19 slots of the second layer, the fourth layer, the sixth layer and the eighth layer, 30 slots of the first slot 300-2B is positioned in the first layer of the stator core 20, two slots of the eighth conductor 300-2B are positioned in the first layer of the stator core 20, 20 slots of the third layer, the fifth layer and the seventh layer, 28 slots of the second layer, the fourth layer, the sixth layer and the eighth layer, and 29 slots of the first layer, the third layer, the fifth layer and the seventh layer, the second layer, the fourth layer, the sixth layer and the eighth layer of the stator core 20 are positioned inside two slots of the second eighth conductor 300-2B; and two slot interiors of the seventh conductor 300-2A are located at 28 slots, 39 slots of the second, fourth, sixth and eighth layers of the first, third, fifth and seventh layers of the stator core 20, 29 slots of the first, third, fifth and seventh layers, 37 slots of the second, fourth, sixth and eighth layers of the stator core 20, two slot interiors of the first eighth conductor 300-2B are located at 30 slots of the first, third, fifth and seventh layers, 30 slots of the second, fourth, sixth and eighth layers of the stator core 20, 38 slots of the second, fourth, sixth and eighth layers of the second eighth conductor 300-2B.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An electric machine stator winding comprising a multi-phase winding, characterized in that: any phase winding comprises a plurality of coil groups which are connected in sequence, and the coil groups are arranged in sequence along the circumferential direction of the stator core;

2. The stator winding of an electric machine of claim 1, wherein: in any winding, the number of the coil groups is the same as that of the parallel branches;

any phase winding includes N branches, N branches are connected in parallel along the circumference of the stator core in sequence, wherein N is more than or equal to 2.

3. A stator winding for an electrical machine according to claim 1 or 2, wherein: the first conductor set comprises a plurality of first conductors, the first conductors are full-pitch conductors, the pitch of the first conductors is 9, and the number of the first conductors is 3.

4. A stator winding for an electrical machine according to claim 1 or 2, wherein: the second conductor group comprises a plurality of second conductors, the second conductors are full-pitch conductors, the pitch of the second conductors is 9, and the number of the second conductors is 3.

5. A stator winding for an electrical machine according to claim 1 or 2, wherein: the second conductor group comprises a plurality of fifth conductors and at least one sixth conductor, the fifth conductors are long-pitch conductors, the sixth conductors are short-pitch conductors, the number of the fifth conductors is 2, the number of the sixth conductors is 1, the pitch of the fifth conductors is 10, and the pitch of the sixth conductors is 7.

6. A stator winding for an electrical machine according to claim 1 or 2, wherein: the second conductor group includes at least one seventh conductor and a plurality of eighth conductors, the seventh conductor is a long-pitch conductor, the eighth conductors are short-pitch conductors, the number of the seventh conductors is 1, the number of the eighth conductors is 2, the pitch of the seventh conductors is 11, and the pitch of the eighth conductors is 8.

7. A stator winding for an electrical machine according to claim 1 or 2, wherein: the third conductor group comprises a plurality of third conductors, the third conductors are full-pitch conductors, the number of the third conductors is three, and the pitch of the third conductors is 9.

8. A stator winding for an electrical machine according to claim 1 or 2, wherein: the third conductor group includes a plurality of ninth conductors and at least one tenth conductor, the ninth conductors are long-pitch conductors, the tenth conductors are short-pitch conductors, the number of the ninth conductors is 2, the number of the tenth conductors is 1, the pitch of the ninth conductors is 10, and the pitch of the tenth conductors is 7.

9. A stator winding for an electrical machine according to claim 1 or 2, wherein: the third conductor group comprises at least one eleventh conductor and a plurality of twelfth conductors, wherein the eleventh conductors are long-pitch conductors, the twelfth conductors are short-pitch conductors, the number of the eleventh conductors is 1, the number of the twelfth conductors is 2, the pitch of the eleventh conductors is 11, and the pitch of the twelfth conductors is 8.

10. A stator winding for an electrical machine according to claim 1 or 2, wherein: the fourth conductor group includes a plurality of fourth conductors and at least one thirteenth conductor, the fourth conductors are long-pitch conductors, the thirteenth conductors are short-pitch conductors, the number of the fourth conductors is 2, the number of the thirteenth conductors is 1, the pitch of the fourth conductors is 10, and the pitch of the thirteenth conductors is 7.

11. A stator winding for an electrical machine according to claim 1 or 2, wherein: the fourth conductor group includes at least one fourteenth conductor and a plurality of fifteenth conductors, the fourteenth conductor is a long-pitch conductor, the fifteenth conductor is a short-pitch conductor, the number of the fourteenth conductors is 1, the number of the fifteenth conductors is 2, the pitch of the fourteenth conductors is 11, and the number of the fifteenth conductors is 8.

12. A stator winding for an electrical machine according to claim 1 or 2, wherein: welding ends of the conductors of the first conductor group extend along the circumferential direction of the stator core in the same direction, welding ends of the conductors of the fourth conductor group extend along the circumferential direction of the stator core in the same direction, and the extending direction of the welding ends of the conductors of the first conductor group is opposite to the extending direction of the welding ends of the conductors of the fourth conductor group;

the welding ends of the conductors of the second conductor group and the welding ends of the conductors of the third conductor group extend along the circumferential direction of the stator core, and the extending directions of the welding ends of the conductors of the second conductor group and the welding ends of the conductors of the third conductor group are opposite.

13. A stator winding for an electrical machine according to claim 1 or 2, wherein: the number of radial layers of the stator core is an even number which is more than or equal to 4, and the number of radial layers of the stator core is more than or equal to 2 of parallel branches.

14. The stator winding of an electric machine of claim 1, wherein: and two welding ends of two adjacent layers of conductors in any phase of winding are welded at the same pitch, and the whole pitch is 9.

15. A stator for an electrical machine, comprising: comprising a stator core and a stator winding of an electrical machine according to any one of claims 1-14, which stator winding is arranged on the stator core.

16. An electric machine characterized by: comprising an electric machine stator according to claim 15.