CN113141069A

CN113141069A - Motor stator and motor

Info

Publication number: CN113141069A
Application number: CN202110531678.2A
Authority: CN
Inventors: 石永利
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Tianjin Songzheng Auto Parts Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-07-20

Abstract

The invention provides a motor stator and a motor, wherein each phase winding comprises: a plurality of first conductor sets, a plurality of second conductor sets, any conductor set comprising a plurality of conductors; the pitch of at least one conductor of the first conductor set is different from the pitch of the conductor of the second conductor set; each phase winding further comprises: the first connecting welding parts and the second connecting welding parts are arranged, and any connecting welding part is formed by connecting one welding end of one conductor with one welding end of another conductor; the pitch of the first connection welds is different from the pitch of the second connection welds. According to the technical scheme of the motor stator in the embodiment of the application, the bus bar and the bus bar which are connected in parallel between the windings of each phase in the related technology are omitted, heat dissipation is uniform, power and torque are improved, a wiring mode is simplified, complexity of a manufacturing process is reduced, production cost is reduced, and machining efficiency is improved.

Description

Motor stator and motor

Technical Field

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

Background

Stator winding includes a plurality of U-shaped conductors, with a plurality of U-shaped conductors according to certain mode of arranging, wears into stator core's inslot, forms the three-phase winding of required motor, need use a large amount of busbars and busbar connection this phase winding between every phase winding among the prior art, stator winding's the mode of arranging is complicated, takes shape the difficulty, high in production cost, machining efficiency is low.

Disclosure of Invention

The invention mainly aims to provide a motor stator and a motor, which cancel a bus bar and a bus bar, realize uniform heat dissipation, improve power and torque, simplify a wiring mode, further reduce the complexity of a manufacturing process, reduce production cost and improve processing efficiency.

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

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

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 includes: a plurality of first conductor sets, a plurality of second conductor sets, any conductor set comprising a plurality of conductors;

the pitch of at least one conductor of the first conductor set is different from the pitch of the conductor of the second conductor set;

each phase winding further comprises: the first connecting welding parts and the second connecting welding parts are arranged, and any connecting welding part is formed by connecting one welding end of one conductor with one welding end of another conductor;

the pitch of the first connection welds is different from the pitch of the second connection welds.

Furthermore, the slot insides of the conductors of the plurality of first conductor groups are located on the radial Mth layer of the stator core, and the slot insides of the conductors corresponding to the two welding ends of the plurality of first connection welding parts are located on the radial Mth layer of the stator core.

Further, the inside of the slot of the conductor of the plurality of second conductor groups is located at two radially adjacent layers of the stator core, and the inside of the slot of the conductor corresponding to the plurality of second connection welding parts is located at two radially adjacent layers of the stator core.

Further, the first conductor group comprises a first large conductor and a first small conductor, the pitch between the groove interiors of the first large conductor is a long pitch, and the pitch between the groove interiors of the first small conductor is a short pitch; the pitch of the first connection weld is a full pitch.

Further, the second conductor group includes a second conductor whose pitch between the groove interiors is a long pitch, and the pitch of the second connection weld is a short pitch.

Further, the second conductor group includes a second conductor whose pitch between the groove interiors is a short pitch, and the pitch of the second connection weld is a long pitch.

Further, the phase winding further includes: and the inner parts of the grooves of the conductors corresponding to the third connection welding part and the fourth connection welding part are positioned on the Mth layer in the radial direction of the stator core.

Further, the pitch of the third connection weld is a long pitch, and the pitch of the fourth connection weld is a short pitch.

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

The technical scheme of the invention is applied, the stator of the motor and the motor comprise a stator core, wherein the stator core is provided with a plurality of core slots, and the core slots are formed on the radial inner surface of the stator core and are spaced at preset slot pitches along the circumferential direction of the stator core; 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 includes: a plurality of first conductor sets, a plurality of second conductor sets, any conductor set comprising a plurality of conductors; the pitch of at least one conductor of the first conductor set is different from the pitch of the conductor of the second conductor set; each phase winding further comprises: the first connecting welding parts and the second connecting welding parts are arranged, and any connecting welding part is formed by connecting one welding end of one conductor with one welding end of another conductor; the pitch of the first connection welds is different from the pitch of the second connection welds. According to the technical scheme of the motor stator in the embodiment of the application, the bus bar and the bus bar which are connected in parallel between the windings of each phase in the related technology are omitted, heat dissipation is uniform, power and torque are improved, a wiring mode is simplified, complexity of a manufacturing process is reduced, production cost is reduced, and machining efficiency is improved.

Drawings

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

In the drawings:

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

fig. 2 is a schematic structural diagram of a stator winding-phase winding according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram of a first conductor set according to one embodiment of the present invention;

FIG. 4 is a schematic diagram of a second conductor set according to a first embodiment of the present invention;

FIG. 5 is a schematic plan view of a phase winding in a phase deployment in accordance with an embodiment of the present invention;

FIG. 6 is a schematic plane development of a phase winding according to a second embodiment of the present invention;

FIG. 7 is a schematic structural diagram of insulation paper in a slot of a stator of a first motor according to an embodiment of the present invention;

FIG. 8 is a schematic view of the structure of the insulation paper in the slots of the stator of the second motor according to the embodiment of the invention;

FIG. 9 is a schematic view of an insulation paper structure in a stator slot of a third motor according to an embodiment of the present invention;

FIG. 10 is a schematic view of an insulation paper structure in a slot of a stator of a fourth motor according to an embodiment of the present invention;

Detailed Description

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

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not 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 invention provides a motor stator. The extending direction of A1A2 in FIG. 1 is parallel to the axial direction of the stator core, and the pitch in the application is the interval between two slot inner parts 301 of the same conductor along the circumferential direction, or the pitch is the sum of the span between the slot inner parts 301 corresponding to one welding end 303 of one conductor and the span between the slot inner parts 301 corresponding to one welding end 303 of the other conductor; each conductor comprises two slot inner parts 301 positioned in different slots in the circumferential direction of the stator core, an out-slot turning part 302 positioned outside the slots and connected to the two slot inner parts 301, and a slot outer end part 303 positioned outside the slots and respectively connected to the two slot inner 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 motor, including: a stator core 20, the stator core 20 having a plurality of core slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

as shown in fig. 1 to 2, 5 to 6, the stator winding 10, which includes a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, forms M layers in the radial direction of the stator core 20, and the phase windings (U-phase winding or V-phase winding or W-phase winding) in the present embodiment form 5 layers in the radial direction of the stator core; it should be noted that M may be an odd number of 3 or more, and when M is 3, the number of the second conductor groups is reduced accordingly.

Referring to fig. 1 to 10, in the present embodiment, the stator winding 10 is mounted on the stator core 20, that is, the plurality of phase windings mounted on the stator core 20 are different from each other in electrical phase, and in the first embodiment and the second embodiment, the stator winding 10 is a three-phase (i.e., U-phase winding, V-phase winding, W-phase winding) winding, and each phase slot of each pole is equal to or equal to 2; 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 to form both

end faces

25, 26 of the stator core in the axial direction, and other conventional metal plates may be used instead of the magnetic steel plates. Fig. 7 shows that the first kind of in-slot insulating paper 30 in this embodiment is S-shaped paper, fig. 8 shows that the second kind of in-slot insulating paper 30 in this embodiment is B-shaped insulating paper, fig. 9 shows that the third kind of in-slot insulating paper 30 in this embodiment is large S-shaped insulating paper, any one of the three kinds of in-slot insulating paper can be selected to separate the conductors between the slots 21 in this embodiment, and fig. 10 shows that the fourth kind of in-slot insulating paper 30 in this embodiment is single large-mouth-shaped paper, when the conductor insulation is selected to be thicker, the separation is not needed in the middle, and the fourth kind of in-slot insulating paper 30 can be used.

As shown in fig. 5 to 6, in the first and second embodiments, each phase winding (U-phase winding, V-phase winding, W-phase winding) includes 4 first conductor groups and 16 second conductor groups, where M is 5 in the present embodiment, and when the number of the second conductor groups in the first and second embodiments is 8, M is 3. In the first and second embodiments, the first conductor set includes two conductors, and the second conductor set includes two conductors.

As shown in fig. 5, in the first embodiment, the first conductor group 100 includes a first large conductor 1000A and a first small conductor 1000B, two slot interiors 301 of the first large conductor 1000A of the first conductor group 100 are located in the 2 nd slot and the 9 th slot of the fifth layer of the stator core, two slot interiors 301 of the first small conductor 1000B of the first conductor group 100 are located in the 3 rd slot and the 8 th slot of the fifth layer of the stator core, that is, the pitch of the first large conductor 1000A is a long pitch (in this embodiment, the long pitch is 7), and the pitch of the first small conductor 1000B is a short pitch 5 (in this embodiment, the short pitch is 5); the second conductor set includes two second conductors 2000, two slot interiors 301 of a first second conductor 2000 of the second conductor set are located in a1 st slot and a 8 th slot of a third layer in the radial direction of the stator core, two slot interiors 301 of a second conductor 2000 of the second conductor set are located in a2 nd slot and a 9 th slot of a fourth layer in the radial direction of the stator core, and a pitch of the second conductors 2000 is a long pitch (the long pitch is 7 in the embodiment), that is, a short pitch of a first small conductor 1000B of the first conductor set is different from a long pitch of a second conductor 2000 of the second conductor set.

As shown in fig. 6, in the second embodiment, the first conductor group 100 includes a first large conductor 1000A and a first small conductor 1000B, two slot interiors 301 of the first large conductor 1000A of the first conductor group 100 are located in the 1 st slot and the 8 th slot of the fifth layer of the stator core, two slot interiors 301 of the first small conductor 1000B of the first conductor group 100 are located in the 2 nd slot and the 7 th slot of the fifth layer of the stator core, that is, the pitch of the first large conductor 1000A is a long pitch (in the present embodiment, the long pitch is 7), and the pitch of the first small conductor 1000B is a short pitch 5 (in the present embodiment, the short pitch is 5); the second conductor group includes two second conductors 2000, two slot interiors 301 of a first second conductor 2000 of the second conductor group are located in a third 2 nd slot and a fourth 7 th slot in the radial direction of the stator core, two slot interiors 301 of a second conductor 2000 of the second conductor group are located in a third 3 rd slot and a fourth 8 th slot in the radial direction of the stator core, and a pitch of the second conductors 2000 is a short pitch (in the present embodiment, the short pitch is 5), that is, a long pitch of a first large conductor 1000A of the first conductor group is different from a short pitch of a pitch of the second conductor 2000 of the second conductor group.

As shown in fig. 5 to 6, in the first and second embodiments, the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding portions 800 and a plurality of second connection welding portions 900, the first connection welding portion 800 is a welding end of a conductor located at the fifth layer in the radial direction of the stator core and is connected with a welding end 303 of another conductor located at the fifth layer in the radial direction of the stator core, the second connection welding portion 900 is a welding end 303 of a conductor located at the third layer in the radial direction of the stator core and is connected with a welding end 303 of another conductor located at the fourth layer in the radial direction of the stator core, that is, one welding end 303 of one conductor is connected with one welding end 303 of another conductor in any connection welding portion;

as shown in fig. 5, in the first embodiment, the pitch between the inside 301 of the first small conductor 1000B located in the 5 th radial layer and 8 th radial layer of the stator core and the inside 301 of the first large conductor 1000A located in the 5 th radial layer and 14 th radial layer of the stator core is a full pitch, and the pitch between the inside 301 of the second conductor 2000 located in the 8 th radial layer and 8 th radial layer of the stator core and the inside 301 of the second conductor 2000 located in the 4 th radial layer and 13 th radial layer of the stator core is a short pitch, that is, the pitch (full pitch) of the first connection weld 800 is different from the pitch (short pitch) of the second connection weld.

As shown in fig. 6, in the second embodiment, the pitch between the inside 301 of the slot corresponding to the one welding end 303 of the first small conductor 1000B located in the 5 th slot in the radial direction of the stator core and the inside 301 of the slot corresponding to the one welding end 303 of the first large conductor 1000A located in the 5 th slot in the radial direction of the stator core and the 13 th slot in the radial direction of the stator core is a full pitch, and the pitch between the inside 301 of the slot corresponding to the one welding end 303 of the second conductor 2000 located in the 7 th slot in the 3 rd radial direction of the stator core and the inside 301 of the slot corresponding to the one welding end 303 of the second conductor 2000 located in the 14 th slot in the 4 th radial direction of the stator core is a long pitch, that is, the pitch (full pitch) of the first connection welding portion 800 is different from the pitch (long pitch) of the second connection welding portion 900. According to the technical scheme of the motor stator in the embodiment of the application, the bus bar and the bus bar which are connected in parallel between the windings of each phase in the related technology are omitted, heat dissipation is uniform, power and torque are improved, a wiring mode is simplified, complexity of a manufacturing process is reduced, production cost is reduced, and machining efficiency is improved.

Exemplarily, as shown in fig. 5, in the first embodiment, 4 first conductor groups are arranged in each phase of winding, two slot interiors 301 of the first large conductor 1000A of the first conductor group are located in the 2 nd slot and the 9 th slot of the 5 th layer in the radial direction of the stator core, and two slot interiors 301 of the first small conductor 1000B of the first conductor group 100 are located in the 3 rd slot and the 8 th slot of the 5 th layer in the radial direction of the stator core; the two slot interiors 301 of the first large conductor 1000A of the second first conductor group 100 are positioned in the 14 th slot and the 21 st slot of the radial 5 th layer of the stator core, and the two slot interiors 301 of the first small conductor 1000B of the second first conductor group 100 are positioned in the 15 th slot and the 20 th slot of the radial 5 th layer of the stator core; the two slot interiors 301 of the first large conductors 1000A of the third first conductor group 100 are positioned in the 26 th slot and the 33 th slot of the 5 th layer in the radial direction of the stator core, and the two slot interiors 301 of the first small conductors 1000B of the third first conductor group 100 are positioned in the 27 th slot and the 32 th slot of the 5 th layer in the radial direction of the stator core; the two slot interiors 301 of the first large conductors 1000A of the fourth first conductor group 100 are located in the 38 th slot and the 45 th slot of the 5 th layer in the radial direction of the stator core, and the two slot interiors 301 of the first small conductors 1000B of the fourth first conductor group 100 are located in the 39 th slot and the 44 th slot of the 5 th layer in the radial direction of the stator core; the 4 first connection welding parts 800 of each phase of winding, the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the first connection welding part 800 are positioned in the 8 th slot and the 14 th slot of the radial 5 th layer of the stator core, the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the second first connection welding part 800 are positioned in the 9 th slot and the 15 th slot of the radial 5 th layer of the stator core, the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the third first connection welding part 800 are positioned in the 32 th slot and the 38 th slot of the radial 5 th layer of the stator core, and the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the fourth first connection welding part 800 are positioned in the 33 rd slot and the 39 th slot of the radial 5 th layer of the stator core; that is, the slot interiors 301 of the conductors of the 4 first conductor groups 100 are all located at the 5 th radial layer of the stator core, and the slot interiors 301 of the conductors corresponding to the two welding ends 303 of the 4 first connection welding portions 800 are all located at the 5 th radial layer of the stator core.

Exemplarily, as shown in fig. 6, in the second embodiment, 4 first conductor groups 100 are wound for each phase, two slot interiors 301 of the first large conductor 1000A of the first conductor group 100 are located in the 1 st slot and the 8 th slot of the 5 th layer in the radial direction of the stator core, and two slot interiors 301 of the first small conductor 1000B of the first conductor group 100 are located in the 2 nd slot and the 7 th slot of the 5 th layer in the radial direction of the stator core; the two slot interiors 301 of the first large conductor 1000A of the second first conductor group 100 are positioned in the 13 th slot and the 20 th slot of the radial 5 th layer of the stator core, and the two slot interiors 301 of the first small conductor 1000B of the second first conductor group 100 are positioned in the 14 th slot and the 19 th slot of the radial 5 th layer of the stator core; the two slot interiors 301 of the first large conductors 1000A of the third first conductor group 100 are positioned in the 25 th slot and the 32 th slot of the 5 th layer in the radial direction of the stator core, and the two slot interiors 301 of the first small conductors 1000B of the third first conductor group 100 are positioned in the 26 th slot and the 31 th slot of the 5 th layer in the radial direction of the stator core; the two slot interiors 301 of the first large conductors 1000A of the fourth first conductor group 100 are located in the 37 th slot and the 44 th slot of the 5 th layer in the radial direction of the stator core, and the two slot interiors 301 of the first small conductors 1000B of the fourth first conductor group 100 are located in the 38 th slot and the 43 th slot of the 5 th layer in the radial direction of the stator core; the 4 first connection welding parts 800 of each phase of winding, the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the first connection welding part 800 are positioned in the 7 th slot and the 13 th slot of the radial 5 th layer of the stator core, the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the second first connection welding part 800 are positioned in the 8 th slot and the 14 th slot of the radial 5 th layer of the stator core, the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the third first connection welding part 800 are positioned in the 31 st slot and the 37 th slot of the radial 5 th layer of the stator core, and the in-slot parts 301 of the conductors corresponding to the two welding ends 303 of the fourth first connection welding part 800 are positioned in the 32 nd slot and the 38 th slot of the radial 5 th layer of the stator core; the slot interiors 301 of the conductors of the 4 first conductor groups 100 are located on the radial 5 th layer of the stator core, and the slot interiors 301 of the conductors corresponding to the two welding ends 303 of the 4 first connection welding portions 800 are located on the radial 5 th layer of the stator core.

With reference to fig. 3, 5, and 6, the pitch between the groove interiors 301 of the first large conductors 1000A is a long pitch, and the pitch between the groove interiors 301 of the first small conductors 1000B is a short pitch; the pitch of the first connection welding portion 800 is a full pitch, specifically, with reference to fig. 5, in the first embodiment, the pitch of the first connection welding portion 800 formed by the welding end 303 of the first small conductor 1000B connected to the one in-slot portion 301 of the 8 th slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first large conductor 1000A connected to the one in-slot portion 301 of the 14 th slot of the fifth layer in the radial direction of the stator core is a full pitch (the full pitch is 6 in the present embodiment), the pitch of the second first connection welding portion 800 formed by the welding end 303 of the first large conductor 1000A connected to the one in-slot portion 301 of the 9 th slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first small conductor 1000B connected to the one in-slot portion 301 of the 15 th slot of the fifth layer in the radial direction of the stator core is a full pitch (the full pitch is 6 in the present embodiment), and the third first connection welding portion 800 formed by the first small conductor 1000B connected to the one in-slot portion 301 of the second small conductor 1000B connected to the one in-slot portion of the 32 th slot of the fifth layer in the radial direction of the stator core The pitch of the welding end 303 of the first large conductor 1000A connected to the welding end 303 in the one slot inside 301 of the 38 th slot of the fifth layer of the stator core in the radial direction is a whole pitch (the whole pitch is 6 in the embodiment), and the pitch of the fourth first connection welding portion 800 of the first large conductor 1000A connected to the welding end 303 in the one slot inside 301 of the 33 th slot of the fifth layer of the stator core in the radial direction is a whole pitch (the whole pitch is 6 in the embodiment) of the welding end 303 of the first small conductor 1000B connected to the welding end 303 in the one slot inside 301 of the 39 th slot of the fifth layer of the stator core in the radial direction; specifically, referring to fig. 6, in the second embodiment, the pitch of the first connection weld 800 formed by the welding end 303 of the first small conductor 1000B connected to the welding end 303 of the first small conductor located in the one slot inside 301 of the 7 th slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first large conductor 1000A connected to the one slot inside 301 of the 13 th slot of the fifth layer in the radial direction of the stator core is a full pitch (in the present embodiment, the full pitch is 6), the pitch of the second first connection weld 800 formed by the welding end 303 of the first large conductor 1000A connected to the one slot inside 301 of the 8 th slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first small conductor 1000B connected to the one slot inside 301 of the 14 th slot of the fifth layer in the radial direction of the stator core is a full pitch (in the present embodiment, the full pitch is 6), and the third first connection weld 800 formed by the welding end 303 of the first small conductor 1000B connected to the one slot inside 301 of the first small conductor 1000B located in the fifth slot of the fifth layer in the radial direction of the stator core The pitch of the welding ends 303 connected to the inside 301 of one 37 th slot of the fifth layer of the sub-core is a full pitch (the full pitch is 6 in the present embodiment), and the pitch of the welding ends 303 connected to the inside 301 of one 32 th slot of the fifth layer of the stator core by the first large conductor 1000A and the welding ends 303 connected to the inside 301 of one 38 th slot of the fifth layer of the stator core by the first small conductor 1000B is a full pitch (the full pitch is 6 in the present embodiment).

With reference to fig. 4 and 5, in the first embodiment, 16 second conductor sets of each phase winding, two slot interiors 301 of the first second conductors 2000 of the first second conductor set 200 are located in the 1 st slot of the 2 nd layer and the 8 th slot of the 1 st layer in the radial direction of the stator core, and two slot interiors 301 of the second conductors 2000 of the first second conductor set 200 are located in the 2 nd slot of the 2 nd layer and the 9 th slot of the 1 st layer in the radial direction of the stator core; the two slot interiors 301 of the first second conductor 2000 of the second conductor group 200 are located in the 7 th slot and the 14 th slot of the 1 st layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the second conductor group 200 are located in the 8 th slot and the 15 th slot of the 1 st layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the third second conductor group 200 are located in the 13 th slot and the 20 th slot of the 1 st layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the third second conductor group 200 are located in the 14 th slot and the 21 st slot of the 2 nd layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the fourth second conductor group 200 are located in the 19 th slot, the 26 th slot and the two slot interiors 301 of the second conductor 2000 of the fourth second conductor group 200 are located in the 20 th slot and the radial direction of the 2 nd layer in the stator core, The 27 th slot of the 1 st layer, the two slot interiors 301 of the first second conductor 2000 of the fifth second conductor group 200 are positioned in the 25 th slot of the 2 nd layer and the 32 th slot of the 1 st layer in the radial direction of the stator core, and the two slot interiors 301 of the second conductor 2000 of the fifth second conductor group 200 are positioned in the 26 th slot of the 2 nd layer and the 33 th slot of the 1 st layer in the radial direction of the stator core; the two slot interiors 301 of the first second conductor 2000 of the sixth second conductor group 200 are located in the 31 st slot and the 38 th slot of the 2 nd layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the sixth second conductor group 200 are located in the 32 nd slot and the 39 th slot of the 1 st layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the seventh second conductor group 200 are located in the 37 th slot and the 44 th slot of the 2 nd layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the seventh second conductor group 200 are located in the 38 th slot and the 45 th slot of the 1 st layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the eighth second conductor group 200 are located in the 43 th slot, the 2 nd layer in the radial direction of the stator core, the 2 nd slot interior 301 of the eighth second conductor 2000 of the eighth second conductor group 200 is located in the radial direction of the 2 nd slot 44 of the stator core, Layer 1, groove 3; the two slot interiors 301 of the first second conductors 2000 of the ninth second conductor group 200 are located in the 1 st slot and the 8 th slot of the 4 th layer in the radial direction of the stator core, and the two slot interiors 301 of the second conductors 2000 of the ninth second conductor group 200 are located in the 2 nd slot and the 9 th slot of the 3 rd layer in the radial direction of the stator core; the two slot interiors 301 of the first second conductor 2000 of the tenth second conductor group 200 are located in the 7 th slot and the 14 th slot of the 4 th layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the tenth second conductor group 200 are located in the 8 th slot and the 15 th slot of the 4 th layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the eleventh second conductor group 200 are located in the 13 th slot and the 20 th slot of the 4 th layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the eleventh second conductor group 200 are located in the 14 th slot and the 21 st slot of the 4 th layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the twelfth second conductor group 200 are located in the 19 th slot and the 3 rd slot of the 4 th layer in the radial direction of the stator core, and the two slot interiors 301 of the second conductor 2000 of the tenth second conductor group 200 are located in the 20 th slot and the radial direction of the stator core, The 27 th slot of the 3 rd layer, the two slot interiors 301 of the first second conductor 2000 of the thirteenth second conductor group 200 are positioned in the 25 th slot of the 4 th layer and the 32 th slot of the 3 rd layer in the radial direction of the stator core, and the two slot interiors 301 of the second conductor 2000 of the thirteenth second conductor group 200 are positioned in the 26 th slot of the 4 th layer and the 33 rd slot of the 3 rd layer in the radial direction of the stator core; the two slot interiors 301 of the first second conductor 2000 of the fourteenth second conductor group 200 are located in the 31 st slot and the 38 rd slot of the 4 th layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the fourteenth second conductor group 200 are located in the 32 nd slot and the 39 th slot of the 3 rd layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the fifteenth second conductor group 200 are located in the 37 th slot and the 44 th slot of the 3 rd layer in the radial direction of the stator core, the two slot interiors 301 of the second conductor 2000 of the fifteenth second conductor group 200 are located in the 38 th slot and the 45 th slot of the 4 th layer in the radial direction of the stator core, the two slot interiors 301 of the first second conductor 2000 of the sixteenth second conductor group 200 are located in the 43 th slot and the 2 nd slot of the 4 th layer in the radial direction of the stator core, and the two slot interiors 301 of the second conductor 2000 of the sixteenth second conductor group 200 are located in the 44 th slot and the radial direction of the stator core, Layer 3, groove 3; 32 second connection welding parts 900 of each phase winding, wherein the groove insides 301 of the conductors corresponding to the two welding ends of the first second connection welding part 900 are positioned in the 2 nd groove and the 7 th groove of the 1 st layer in the radial direction of the stator core, the groove insides 301 of the conductors corresponding to the two welding ends 303 of the second connection welding part 900 are positioned in the 3 rd groove and the 8 th groove of the 2 nd layer in the radial direction of the stator core, the groove insides 301 of the conductors corresponding to the two welding ends 303 of the third second connection welding part 900 are positioned in the 8 th groove and the 13 th groove of the 1 st layer in the radial direction of the stator core, the groove insides 301 of the conductors corresponding to the two welding ends 303 of the fourth connection welding part 900 are positioned in the 9 th groove and the 14 th groove of the 1 st layer in the radial direction of the stator core, and the groove insides 301 of the conductors corresponding to the two welding ends 303 of the fifth second connection welding part 900 are positioned in the 14 th groove and the 14 th groove of the 1 st layer in the radial direction of the stator core, The 19 th slot of the 2 nd layer, the slot inner 301 of the conductor corresponding to the two welding ends 303 of the sixth second connection welding part 900 are located in the 15 th slot of the 1 st layer and the 20 th slot of the 2 nd layer in the radial direction of the stator core, the slot inner 301 of the conductor corresponding to the two welding ends 303 of the seventh second connection welding part 900 are located in the 20 th slot of the 3 rd layer and the 25 th slot of the 2 nd layer in the radial direction of the stator core, the slot inner 301 of the conductor corresponding to the two welding ends 303 of the eighth second connection welding part 900 are located in the 21 st slot of the 3 rd layer and the 26 nd slot of the 2 nd layer in the radial direction of the stator core, the slot inner 301 of the conductor corresponding to the two welding ends 303 of the ninth second connection welding part 900 are located in the 26 th slot of the 3 rd layer and the 31 st slot of the radial layer of the stator core, the slot inner 301 of the conductor corresponding to the two welding ends 303 of the tenth second connection welding part 900 are located in the 27 th slot of the 3 rd layer and the 32 nd slot of the radial direction of the stator core, the in-slot portions 301 of the conductors corresponding to the two welding ends 303 of the eleventh second connection welding portion 900 are located in the 32 th slot and the 37 th slot of the 1 st layer in the radial direction of the stator core, the in-slot portions 301 of the conductors corresponding to the two welding ends 303 of the twelfth second connection welding portion 900 are located in the 33 th slot and the 38 th slot of the 2 nd layer in the radial direction of the stator core, the in-slot portions 301 of the conductors corresponding to the two welding ends 303 of the thirteenth second connection welding portion 900 are located in the 38 th slot and the 43 th slot of the 1 st layer in the radial direction of the stator core, the in-slot portions 301 of the conductors corresponding to the two welding ends 303 of the fourteenth second connection welding portion 900 are located in the 39 th slot and the 44 th slot of the 2 nd layer in the radial direction of the stator core, and the in-slot portions 301 of the conductors corresponding to the two welding ends 303 of the fifteenth second connection welding portion 900 are located in the 44 th slot and the 44 th slot of the 1 st layer in the radial direction of the stator core, The slot inner parts 301 of the conductors corresponding to the 1 st slot of the 2 nd layer and the sixteenth two welding ends 303 of the sixteenth second connection welding part 900 are positioned in the 45 th slot of the 1 st layer and the 2 nd slot of the 2 nd layer in the radial direction of the stator core; the in-slot portions 301 of the conductors of the 16 second conductor sets 200 are located in two radially adjacent layers of the stator core, and the in-slot portions 301 of the conductors corresponding to the two weld ends 303 of the 32 second connection weld portions 900 are located in two radially adjacent layers of the stator core.

With reference to fig. 4 and 5, the pitch between the groove interiors 301 of the first second conductors 2000 of the second conductor group 200 is a long pitch, and the pitch between the groove interiors 301 of the second conductors 2000 of the second conductor group 200 is a long pitch; the pitch of the second connection welding portion 900 is a short pitch, specifically, referring to fig. 5, in the first embodiment, the pitch formed by the welding end 303 of the first second connection welding portion 900 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 2 nd slot of the first radial layer of the stator core and the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 7 th slot of the second radial layer of the stator core is a short pitch (the short pitch is 5 in the present embodiment), the pitch formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 3 rd slot of the first radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 8 th slot of the second radial layer of the stator core is a short pitch (the short pitch is 5 in the present embodiment), and the third second connection welding portion 900 is formed by the welding end 303 of the second conductor 2000 connected to the welding end of the second conductor 301 located in one slot inside 301 of the 8 th slot of the first radial layer of the stator core 2000 the welding ends 303 of the second conductor 2000 connected in one slot inside 301 of the 13 th slot of the second layer in the radial direction of the stator core are formed at a short pitch (in the present embodiment, the short pitch is 5), the fourth second connection welding portion 900 is formed at a short pitch (in the present embodiment, the short pitch is 5) by the welding end 303 of the second conductor 2000 connected in one slot inside 301 of the 9 th slot of the first layer in the radial direction of the stator core and the welding end 303 of the second conductor 2000 connected in one slot inside 301 of the 14 th slot of the second layer in the radial direction of the stator core, the fifth second connection welding portion 900 is formed at a short pitch (in the present embodiment, the short pitch is 5) by the welding end 303 of the second conductor 2000 connected in one slot inside 301 of the 14 th slot of the first layer in the radial direction of the stator core and the welding end 303 of the second conductor 2000 connected in one slot inside 301 of the 19 th slot of the second layer in the radial direction of the stator core, the sixth second connection welding portion 900 is formed by connecting the welding end 303 of the second conductor 2000 in one slot inside 301 of the 15 th slot of the first radial layer of the stator core with the welding end 303 of the second conductor 2000 in one slot inside 301 of the 20 th slot of the second radial layer of the stator core at a short pitch (the short pitch is 5 in the present embodiment), the seventh second connection welding portion 900 is formed by connecting the welding end 303 of the second conductor 2000 in one slot inside 301 of the 20 th slot of the third radial layer of the stator core with the welding end 303 of the second conductor 2000 in one slot inside 301 of the 25 th slot of the second radial layer of the stator core at a short pitch (the short pitch is 5 in the present embodiment), and the eighth second connection welding portion 900 is formed by connecting the welding end 303 of the second conductor 2000 in one slot inside 301 of the 21 st slot of the third radial layer of the stator core with the welding end 303 of the second conductor 2000 in one slot inside 301 of the 26 th slot of the second radial layer of the stator core at a short pitch The pitch is a short pitch (in this embodiment, the short pitch is 5), the pitch of the ninth second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the inside 301 of one 26 th slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the inside 301 of one 31 th slot of the second radial layer of the stator core is a short pitch (in this embodiment, the short pitch is 5), the pitch of the tenth second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the inside 301 of one 27 th slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the inside 301 of one 32 slots of the second radial layer of the stator core is a short pitch (in this embodiment, the short pitch is 5), and the tenth second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the inside 301 of one 32 th slot of the first radial layer of the stator core and the second conductor 2000 connected to the inside 301 of one 32 th slot of the second radial layer of the stator core is a short pitch of the stator core The pitch of the weld ends 303 connected to each other in the one slot interior 301 of the 37 th slot is a short pitch (in the present embodiment, the short pitch is 5), the pitch of the twelfth second connection weld 900 formed by connecting the weld end 303 of the second conductor 2000 located in one slot interior 301 of the 33 th slot of the first radial layer of the stator core to the weld end 303 of the second conductor 2000 located in one slot interior 301 of the 38 th slot of the second radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5), the pitch of the thirteenth second connection weld 900 formed by connecting the weld end 303 of the second conductor 2000 located in one slot interior 301 of the 38 th slot of the first radial layer of the stator core to the weld end 303 of the second conductor 2000 located in one slot interior 301 of the 43 th slot of the second radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5), and the fourteenth second connection weld 900 formed by connecting the weld ends 301 of the second conductor 2000 located in one slot interior of the 39 th slot of the first radial layer of the stator core to the one slot of the fourth radial layer of the stator core The welding ends 303 of the second conductor 2000 are connected with the welding ends 303 of the second conductor 2000 positioned in one slot inner portion 301 of the 44 slots of the second layer in the radial direction of the stator core at a short pitch (the short pitch is 5 in the present embodiment), the fifteenth second connection weld 900 is formed with a short pitch (5 in the present embodiment) by the weld end 303 of the second conductor 2000 connected in one slot inside 301 of the 44 th slot of the first layer in the radial direction of the stator core and the weld end 303 of the second conductor 2000 connected in one slot inside 301 of the 1 st slot of the second layer in the radial direction of the stator core, a sixteenth second connection weld 900 is formed with a short pitch (in the present embodiment, the short pitch is 5) by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 45 th slot of the first layer in the radial direction of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end located in one slot inside 301 of the 2 nd slot of the second layer in the radial direction of the stator core; a seventeenth second connection welding portion 900 is formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 2 nd slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 7 th slot of the fourth radial layer of the stator core, the pitch of the eighteenth second connection welding portion 900 is formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 3 rd slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 301 located in one slot inside 301 of the 8 th slot of the fourth radial layer of the stator core, the pitch of the nineteenth second connection welding portion 900 is the short pitch (the pitch of the second conductor 900 connected to the welding end 303 of the second conductor 2000 connected to the welding end 301 located in one slot inside 301 of the 8 th slot of the third radial layer of the stator core, and the welding end of the second conductor 2000 connected to the welding end 301 located in the 13 th slot of the fourth radial layer of the stator core 303 is a short pitch (in the present embodiment, the short pitch is 5), the pitch of the twenty second connection welding portions 900 formed by the welding end 303 of the second conductor 2000 connected to the one inside 301 of the 9 th slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the one inside 301 of the 14 th slot of the fourth radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5), the twenty second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the one inside 301 of the 14 th slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the one inside 301 of the 19 th slot of the second radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5), and the twenty second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the one inside 301 of the 15 th slot of the third radial layer of the stator core and the second conductor 2000 located at the stator core The pitch of the weld ends 303 connected to each other in the one slot interior 301 of the 20 th slot in the fourth radial layer of the core is a short pitch (in the present embodiment, the short pitch is 5), the pitch of the twenty-third second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the one slot interior 301 of the 20 th slot in the fifth radial layer of the stator core being connected to the weld end 303 of the second conductor 2000 connected to the one slot interior 301 of the 25 th slot in the fourth radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5), the pitch of the twenty-fourth second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the one slot interior 301 of the 21 st slot in the fifth radial layer of the stator core being connected to the weld end 303 of the second conductor 2000 connected to the one slot interior 301 of the 26 th slot in the fourth radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5), and the twenty-fifth second connection weld 900 formed by the second conductor 2000 connected to the weld end 303 in the 26 th slot interior 301 of the fifth radial layer in the fifth radial layer of the stator core The pitch of the weld end 303 connecting the weld end 303 of the one in-slot portion 301 of the slot and the weld end 303 connecting the second conductor 2000 in the one in-slot portion 301 of the 31 st slot of the fourth radial layer of the stator core is a short pitch (5 in the present embodiment), the pitch of the twenty-sixth second connection weld 900 formed by the weld end 303 connecting the weld end 303 of the second conductor 2000 in the one in-slot portion 301 of the 27 th slot of the fifth radial layer of the stator core and the weld end 303 connecting the weld end 303 of the second conductor 2000 in the one in-slot portion 301 of the 32 th slot of the fourth radial layer of the stator core is a short pitch (5 in the present embodiment), the twenty-seventh second connection weld 900 formed by the weld end 303 connecting the second conductor 2000 in the one in-slot portion 301 of the 32 th slot of the third radial layer of the stator core and the weld end 303 connecting the weld end 303 of the second conductor 2000 in the one in-slot portion 301 of the 37 th slot of the fourth radial layer of the stator core is a short pitch (5 in the present embodiment), the pitch of the twenty-eighth second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 33 rd slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 38 th slot of the fourth radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5), the pitch of the twenty-ninth second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 43 th slot of the fourth radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 39 th slot of the third radial layer of the stator core and the welding end 301 of the second conductor 2000 connected to the welding end of the second conductor 2000 located in one slot inside 301 of the 44 th slot of the fourth radial layer of the stator core is a short pitch (in the present embodiment, the short pitch is 5 th radial layer of the stator core) The pitch formed by the ends 303 is a short pitch (in the embodiment, the short pitch is 5), the pitch formed by the welding ends 303 of the second conductor 2000 connected to the one inside 301 of the 44 th slot of the third radial layer of the stator core and the welding ends 303 of the second conductor 2000 connected to the one inside 301 of the 1 st slot of the fourth radial layer of the stator core is a short pitch (in the embodiment, the short pitch is 5), and the pitch formed by the welding ends 303 of the second conductor 2000 connected to the one inside 301 of the 45 th slot of the third radial layer of the stator core and the one inside 301 of the second conductor 2000 connected to the one inside 301 of the 2 nd slot of the second radial layer of the stator core is a short pitch (in the embodiment, the short pitch is 5);

alternatively, with reference to fig. 4 and 6, the pitch between the groove interiors 301 of the first second conductors 2000 of the second conductor group 200 is a short pitch, and the pitch between the groove interiors 301 of the second conductors 2000 of the second conductor group 200 is a short pitch; the pitch of the second connection welding portion 900 is a long pitch, and specifically, referring to fig. 6, in the second embodiment, the pitch of the first second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the one in-slot portion 301 of the 1 st slot of the first layer in the radial direction of the stator core and the welding end 303 of the second conductor 2000 connected to the one in-slot portion 301 of the 8 th slot of the second layer in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), the pitch of the second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the one in-slot portion 301 of the 2 nd slot of the first layer in the radial direction of the stator core and the welding end 303 of the second conductor 2000 connected to the one in-slot portion 301 of the 9 th slot of the second layer in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), and the third second connection welding portion 900 is formed by the welding end 303 of the second conductor 2000 connected to the one in-slot portion 301 of the second conductor 2000 located in the 7 th slot of the first layer in the radial direction of the stator core 2000 the welding ends 303 connected in one slot inner portion 301 of the 14 th slot of the second layer in the radial direction of the stator core are formed at a long pitch (the long pitch is 7 in the present embodiment), the fourth second connection welding portion 900 is formed at a long pitch (the long pitch is 7 in the present embodiment) the welding end 303 connected by the welding end 303 of the second conductor 2000 in one slot inner portion 301 of the 8 th slot of the first layer in the radial direction of the stator core and the welding end 303 connected by the welding end 303 of the second conductor 2000 in one slot inner portion 301 of the 15 th slot of the second layer in the radial direction of the stator core are formed at a long pitch (the long pitch is 7 in the present embodiment), the fifth second connection welding portion 900 is formed at a long pitch (the long pitch is 7 in the present embodiment) the welding end 303 connected by the welding end 303 of the second conductor 2000 in one slot inner portion 301 of the 13 th slot of the first layer in the radial direction of the stator core and the welding end 303 connected by the welding end 303 of the second conductor 2000 in one slot inner portion 301 of the 20 th slot of the second layer in the radial direction of the second layer of the stator core, the sixth second connection weld 900 is formed by connecting the welding end 303 of the second conductor 2000 in one slot inside 301 of the 14 th slot of the first radial layer of the stator core with the welding end 303 of the second conductor 2000 in one slot inside 301 of the 21 th slot of the second radial layer of the stator core at a long pitch (the long pitch is 7 in the present embodiment), the seventh second connection weld 900 is formed by connecting the welding end 303 of the second conductor 2000 in one slot inside 301 of the 19 th slot of the third radial layer of the stator core with the welding end 303 of the second conductor 2000 in one slot inside 301 of the 26 th slot of the second radial layer of the stator core at a long pitch (the long pitch is 7 in the present embodiment), and the eighth second connection weld 900 is formed by connecting the welding end 303 of the second conductor 2000 in one slot inside 301 of the 20 th slot of the third radial layer of the stator core with the welding end 303 of the second conductor 2000 in one slot inside 301 of the 27 th slot of the second radial layer of the stator core at a long pitch The pitch is a long pitch (the long pitch is 7 in this embodiment), the pitch of the ninth second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the one inside 301 of the 25 th slot of the third radial layer of the stator core and the weld end 303 of the second conductor 2000 connected to the one inside 301 of the 32 th slot of the second radial layer of the stator core is a long pitch (the long pitch is 7 in this embodiment), the pitch of the tenth second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the one inside 301 of the 26 th slot of the third radial layer of the stator core and the weld end 303 of the second conductor 2000 connected to the one inside 301 of the 33 th slot of the second radial layer of the stator core is a long pitch (the long pitch is 7 in this embodiment), and the eleventh second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the one inside 301 of the 31 th slot of the first radial layer of the stator core and the second conductor 2000 connected to the weld end 303 of the second conductor 2000 connected to the one inside 301 of the 31 th slot of the first radial layer of the stator core The pitch of the weld ends 303 connected to each other in the one groove portion 301 of the 38 th groove is a long pitch (the long pitch is 7 in the present embodiment), the pitch of the twelfth second connection weld 900 formed by the weld end 303 connected to the one groove portion 301 of the 32 th groove of the first layer of the second conductor 2000 located in the radial direction of the stator core and the weld end 303 connected to the one groove portion 301 of the 39 th groove of the second layer of the second conductor 2000 located in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), the pitch of the thirteenth second connection weld 900 formed by the weld end 303 connected to the one groove portion 301 of the second conductor 2000 located in the 37 th groove of the first layer of the stator core and the weld end 303 connected to the one groove portion 301 of the second conductor 2000 located in the 44 th groove of the second layer of the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), and the fourteenth second connection weld 900 formed by the one groove portion 301 connected to the second conductor 2000 located in the 38 th groove portion of the 38 th groove of the first layer of the radial direction of the stator core The welding ends 303 of the second conductor 2000 are connected with one slot inner portion 301 of the 45 slots of the second layer in the radial direction of the stator core, and the pitch of the welding ends 303 is a long pitch (the long pitch is 7 in the embodiment), the fifteenth second connection weld 900 is formed with a long pitch (7 in the present embodiment) by the weld end 303 of the second conductor 2000 connected in one slot inside 301 of the 43 rd slot of the first layer in the radial direction of the stator core and the weld end 303 of the second conductor 2000 connected in one slot inside 301 of the 2 nd slot of the second layer in the radial direction of the stator core, a sixteenth second connection weld 900 is formed with a long pitch (in the present embodiment, the long pitch is 7) by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 44 th slot of the first layer in the radial direction of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end located in one slot inside 301 of the 3 rd slot of the second layer in the radial direction of the stator core; a seventeenth second connection weld 900 is formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 1 st slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 8 th slot of the fourth radial layer of the stator core at a long pitch (the long pitch is 7 in the present embodiment), the eighteenth second connection weld 900 is formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 2 nd slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 301 located in one slot inside 301 of the 9 th slot of the fourth radial layer of the stator core at a long pitch (the long pitch is 7 in the present embodiment), and the nineteenth second connection weld 900 is formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 7 th slot of the third radial layer of the second radial layer of the stator core at the 14 th slot of the fourth radial layer of the stator core 303 is a long pitch (in the present embodiment, the long pitch is 7), the pitch of the twenty-second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the weld end 303 of the second conductor located in one slot inside 301 of the 8 th slot of the third radial layer of the stator core and the weld end 303 of the second conductor 2000 connected to the weld end 303 of the second conductor located in one slot inside 301 of the 15 th slot of the fourth radial layer of the stator core is a long pitch (in the present embodiment, the long pitch is 7), the pitch of the twenty-second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the weld end 303 of the second conductor located in one slot inside 301 of the 13 th slot of the first radial layer of the stator core and the weld end 303 of the second conductor 2000 connected to the weld end 303 of the second conductor located in the one slot inside 301 of the 14 th slot of the first radial layer of the stator core is a long pitch (in the present embodiment, the long pitch is 7), and the twenty-second connection weld 900 is a long pitch located in the stator core The pitch of the weld ends 303 connected to each other in one slot interior 301 of the 21-slot of the second radial layer of the core is a long pitch (in the present embodiment, the long pitch is 7), the pitch of the twenty-third second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the weld end 301 of the second conductor located to the 26-slot of the fourth radial layer of the stator core is a long pitch (in the present embodiment, the long pitch is 7), the pitch of the twenty-fourth second connection weld 900 formed by the weld end 303 of the second conductor 2000 connected to the weld end 303 of the second conductor 2000 located to the one slot interior 301 of the 27-slot of the fourth radial layer of the stator core is a long pitch (in the present embodiment, the long pitch is 7), and the twenty-fifth second connection weld 900 formed by the second conductor 2000 connected to the weld end 303 of the second conductor located to the 25-slot of the fifth radial layer of the stator core The pitch of the weld end 303 connecting the weld end 303 of the one slot inside 301 of the slot and the weld end 303 connecting the second conductor 2000 to the one slot inside 301 of the 32 th slot of the fourth layer in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), the pitch of the twenty-sixth second connection weld 900 formed by the weld end 303 connecting the weld end 303 of the second conductor 2000 to the one slot inside 301 of the second conductor 2000 to the 33 th slot of the fourth layer in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), the pitch of the twenty-seventh second connection weld 900 formed by the weld end 303 connecting the weld end 303 of the second conductor 2000 to the one slot inside 301 of the 31 th slot of the third layer in the radial direction of the stator core and the weld end 303 connecting the second conductor 2000 to the one slot inside 301 of the 38 th slot of the fourth layer in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), the pitch of the twenty-eighth second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 of the second conductor 2000 located in one slot inside 301 of the 32 th slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 39 th slot of the fourth radial layer of the stator core is a long pitch (the long pitch is 7 in the present embodiment), the pitch of the twenty-ninth second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 37 th slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the welding end 303 located in one slot inside 301 of the 44 th slot of the fourth radial layer of the stator core is a long pitch (the long pitch is 7 in the present embodiment), and the thirty second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the welding end located in one slot inside 301 of the 38 th slot of the third radial layer of the second conductor 2000 located in the fourth radial layer of the stator core is a 45 slots of the fourth radial layer of the stator core The pitch of the ends 303 is a long pitch (in this embodiment, the long pitch is 7), the pitch of the thirty-first second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the one slot inside 301 of the 43 rd slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the one slot inside 301 of the 2 nd slot of the fourth radial layer of the stator core is a long pitch (in this embodiment, the long pitch is 7), and the pitch of the thirty-second connection welding portion 900 formed by the welding end 303 of the second conductor 2000 connected to the one slot inside 301 of the 44 th slot of the third radial layer of the stator core and the welding end 303 of the second conductor 2000 connected to the one slot inside 301 of the 3 slots of the second radial layer of the stator core is a long pitch (in this embodiment, the long pitch is 7).

For example, as shown in fig. 5 and 6, in the first and second embodiments, the phase winding further includes: a third connection welding part 820 and a fourth connection welding part 810, specifically, in combination with fig. 5, in the first embodiment, the pitch formed by the welding end 303 of the third connection welding part 820 connected with the welding end 303 of the first small conductor 1000B located in one slot inside 301 of the 44 th slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first small conductor 1000B located in one slot inside 301 of the 3 rd slot of the fifth layer in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), and the pitch formed by the welding end 303 of the first large conductor 1000A connected with the welding end 303 of the first large conductor 1000A located in one slot inside 301 of the 45 th slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first large conductor 1000A connected with the welding end inside 301 of the 2 nd slot of the first large conductor 1000A in the radial direction of the stator core is a short pitch (the short pitch is 5 in the present embodiment); specifically, referring to fig. 6, in the second embodiment, the pitch formed by the welding end 303 of the first small conductor 1000B connected to the welding end 303 of the first small conductor 1000B located in the one slot inside 301 of the 43 rd slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first small conductor 1000B connected to the one slot inside 301 of the 2 nd slot of the fifth layer in the radial direction of the stator core is a long pitch (the long pitch is 7 in the present embodiment), and the pitch formed by the welding end 303 of the fourth connection welded part connected to the welding end 303 of the first large conductor 1000A located in the one slot inside 301 of the 44 th slot of the fifth layer in the radial direction of the stator core and the welding end 303 of the first large conductor 1000A connected to the one slot inside 301 of the 1 st slot of the fifth layer in the radial direction of the stator core is a short pitch (the short pitch is 5 in the present embodiment).

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

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

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be mechanical or electrical, may be direct, may be indirect via an intermediate medium (bus connection), or may be communication between the two components. Those skilled in the art will understand what is specifically meant by the present invention. Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments illustrated herein, and that various obvious changes, rearrangements and substitutions may be made therein by those skilled in the art without departing from the scope of the invention. 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 of the phase windings includes: a plurality of first conductor sets, a plurality of second conductor sets, any conductor set comprising a plurality of conductors;

a pitch of at least one conductor of the first conductor set is different from a pitch of a conductor of the second conductor set;

each of the phase windings further comprises: the connector comprises a plurality of first connecting welding parts and a plurality of second connecting welding parts, wherein any one of the connecting welding parts is formed by connecting one welding end of one conductor with one welding end of another conductor;

a pitch of the first connection welds is different from a pitch of the second connection welds.

2. The electric machine stator of claim 1, wherein the plurality of first conductor sets have conductors with slot interiors that are all located in the radial mth layer of the stator core, and wherein the plurality of first connection welds have conductors with slot interiors that correspond to the two weld ends that are all located in the radial mth layer of the stator core.

3. The electric machine stator of claim 2, wherein the interiors of the slots of the conductors of the second plurality of conductor sets are located in two radially adjacent layers of the stator core, and the interiors of the slots of the conductors corresponding to the second plurality of connection welds are located in two radially adjacent layers of the stator core.

4. The motor stator according to claim 2, wherein the first conductor group includes a first large conductor and a first small conductor, a pitch between groove interiors of the first large conductor is a long pitch, and a pitch between groove interiors of the first small conductor is a short pitch; the pitch of the first connection weld is a full pitch.

5. The electric machine stator of claim 3, wherein the second conductor set comprises second conductors having a long pitch between slot interiors and a short pitch between the second connection welds.

6. The electric machine stator of claim 3, wherein the second conductor set includes second conductors having a short pitch between groove interiors and a long pitch between the second connection welds.

7. The electric machine stator of any of claims 1 to 6, wherein the phase winding further comprises: and the third connection welding part and the fourth connection welding part are positioned in the radial Mth layer of the stator core.

8. The motor stator of claim 7, wherein the pitch of the third connection weld is a long pitch and the pitch of the fourth connection weld is a short pitch.

9. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 8.