CN213637231U - Motor stator and motor - Google Patents

Abstract

The utility model relates to the field of motors, and discloses a motor stator and a motor, wherein the number of each phase slot of each pole of a stator winding is 2, and three branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of a stator iron core; one of the three branch windings of each phase winding comprises: one of the 1 first conductor set, the plurality of second conductor sets, the plurality of third conductor sets, the 1 fourth conductor set, or the three branch windings of each phase winding includes: a plurality of second conductor sets, a plurality of third conductor sets, 1 fourth conductor set; the winding structure adopts a completely symmetrical structure on a magnetic circuit, eliminates the problem of loop current generated by an asymmetrical structure, reduces torque fluctuation, reduces noise, simplifies manufacturing procedures, reduces production cost and improves processing efficiency.

Description

Motor stator and motor

Technical Field

The utility model relates to a motor field especially relates to a motor stator and motor.

Background

In the prior art, a stator winding comprises a plurality of types of conductors, wherein the plurality of types of conductors comprise a U-shaped conductor and an S-shaped conductor, and the plurality of types of 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. Each phase winding of the existing stator winding is formed by connecting a plurality of branches in parallel or connecting a plurality of branches in series, and for the phase winding with three branches connected in parallel, the number of slots of each phase of each pole of the stator winding is mostly 3; for a phase winding with two or four branches in series, the number of slots per pole per phase of the stator winding is at most 2.

In addition, the stator winding used in the prior art has complex manufacturing procedures, high production cost and low processing efficiency; and the magnetic circuit of the existing stator winding has the problem of loop current, so that the torque fluctuation is increased, and the noise is higher.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and motor has adopted complete symmetrical structure on magnetic circuit through the winding structure, has eliminated because the loop current problem that asymmetric structure produced, and it is undulant to reduce the torque, and the noise reduction simplifies manufacturing procedure, has reduced manufacturing cost, improves machining efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

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

a stator winding having a number of slots per pole per phase of 2, the stator winding including a plurality of phase windings mounted on a stator core so as to be different from each other in electrical phase;

each phase winding is formed by sequentially connecting three branch windings in parallel along the circumferential direction of the stator core;

at least one branch winding of the three branch windings of each phase winding comprises: at least one branch winding of the 1 first conductor set, the plurality of second conductor sets, the plurality of third conductor sets, the 1 fourth conductor set, or the three branch windings of each phase winding comprises: at least one branch winding of the plurality of second conductor sets, the plurality of third conductor sets, the 1 fourth conductor set, or the three branch windings of each phase winding comprises: 1 first conductor set, a plurality of second conductor sets, a plurality of third conductor sets;

dividing each slot into M layers distributed along the radial direction according to the number of the inner slots capable of being accommodated along the radial direction of the stator core, wherein M is an even number more than or equal to 6,

the first conductor group of each branch winding is positioned on the radial Mth layer of the stator core, and the fourth conductor group of each branch winding is positioned on the radial first layer of the stator core;

each conductor set includes a plurality of conductors, the conductors of each conductor set including: the stator core is positioned in two slots separated by a specified slot distance, two welding ends positioned in two slots of which the axial second ends of the stator core are connected with the conductor, and wire inserting ends positioned in two slots of which the axial first ends of the stator core are connected with the conductor;

the welding end connected with the leading-out wire of each branch winding of each phase winding is positioned at the first axial end of the stator core.

Furthermore, the welding end connected by the outgoing line of at least one branch winding of each phase winding is located at two layers adjacent to the radial direction of the stator core, the welding end connected by the outgoing line of the at least one branch winding is located at the radial Nth layer and the (N + 1) th layer of the stator core, or the welding end connected by the outgoing line of the at least one branch winding is located at the radial (N + 1) th layer and the (N + 2) th layer of the stator core, and N is an odd number.

Furthermore, the welding end connected with the leading-out wire of at least one branch winding of each phase winding is positioned on the Mth layer or the first layer of the same radial layer of the stator core.

Further, one of the branch windings of each phase winding further includes a conductor of a first conductor set, or one of the branch windings of each phase winding further includes a conductor of a second conductor set, or one of the branch windings of each phase winding further includes a conductor of a third conductor set, or one of the branch windings of each phase winding further includes a conductor of a fourth conductor set.

Furthermore, the inside of a groove corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two grooves of one conductor of one second conductor group are positioned in two circumferentially adjacent grooves of the stator core; and/or the inside of the groove corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two grooves of one conductor of one third conductor group are positioned in two circumferentially adjacent grooves of the stator core.

Furthermore, the inside of a groove corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two grooves of one conductor of one first conductor group are positioned in two circumferentially adjacent grooves of the stator core; and/or the inside of the groove corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two grooves of one conductor of one fourth conductor group are positioned in two circumferentially adjacent grooves of the stator core.

Further, the first conductor group comprises two first conductors, and the pitch between the two groove interiors of each first conductor is a full pitch; the fourth conductor group includes a fourth large conductor and a fourth small conductor, the pitch between the inside of two slots of the fourth large conductor is a long pitch, and the pitch between the inside of two slots of the fourth small conductor is a short pitch.

Further, the second conductor set includes: the fifth large conductor and the fifth small conductor, or the second conductor group includes: two identical second conductors; the inner parts of two slots of each conductor of the second conductor group are respectively positioned in the Nth layer and the (N + 1) th layer which are adjacent to the stator core in the radial direction, wherein N is an odd number;

the third conductor set includes: and the two groove interiors of each conductor of the third conductor group are respectively positioned in the (N + 1) th layer and the (N + 2) th layer which are radially adjacent to the stator core.

Further, the pitch between the inside of two slots of the fifth large conductor of the second conductor group is a long pitch, and the pitch between the inside of two slots of the fifth small conductor of the second conductor group is a short pitch; the two conductors of the third conductor group are the same third conductor, and the pitch between the two groove interiors of the third conductor is a full pitch, and/or the two conductors of the third conductor group are a sixth large conductor and a sixth small conductor, the pitch between the two groove interiors of the sixth large conductor is a long pitch, and the pitch between the two groove interiors of the sixth small conductor is a short pitch.

Further, the pitch between the two groove interiors of the second conductors of the second conductor group is a full pitch; the two conductors of the third conductor group are the same third conductor, and the pitch between the two groove interiors of the third conductor is a full pitch, and/or the two conductors of the third conductor group are a sixth large conductor and a sixth small conductor, the pitch between the two groove interiors of the sixth large conductor is a long pitch, and the pitch between the two groove interiors of the sixth small conductor is a short pitch.

Furthermore, the phase winding is provided with a plurality of first connecting welding ends and a plurality of second connecting welding ends which are connected together, the welding ends of the same radial adjacent M-1 th layer positioned at the axial second end of the stator core are the first connecting welding ends, the welding ends of the same radial adjacent M-th layer positioned at the axial second end of the stator core are the second connecting welding ends, the sum of the span of the first connecting welding ends and the span of the second connecting welding ends is 6, and M is an even number.

The utility model also provides a motor, including foretell motor stator.

Use the technical scheme of the utility model, a motor stator, include: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; a stator winding having a number of slots per pole per phase of 2, the stator winding including a plurality of phase windings mounted on a stator core so as to be different from each other in electrical phase; each phase winding is formed by sequentially connecting three branch windings in parallel along the circumferential direction of the stator core; one of the three branch windings of each phase winding comprises: one of the 1 first conductor set, the plurality of second conductor sets, the plurality of third conductor sets, the 1 fourth conductor set, or the three branch windings of each phase winding includes: one of the plurality of second conductor sets, the plurality of third conductor sets, the 1 fourth conductor set, or the three-branch winding of each phase winding comprises: 1 first conductor set, a plurality of second conductor sets, a plurality of third conductor sets; dividing each slot into M layers distributed along the radial direction according to the number of the slots which can be accommodated in the radial direction of the stator core, wherein M is an even number which is more than or equal to 6, a first conductor group of each branch winding is positioned on the Mth layer of the radial direction of the stator core, and a fourth conductor group of the branch winding is positioned on the first layer of the radial direction of the stator core; each conductor set includes a plurality of conductors, the conductors of each conductor set including: the stator core is positioned in two slots separated by a specified slot distance, two welding ends positioned in two slots of which the axial second ends of the stator core are connected with the conductor, and wire inserting ends positioned in two slots of which the axial first ends of the stator core are connected with the conductor; the welding end connected with the leading-out wire of each branch winding of each phase winding is positioned at the first axial end of the stator core. By adopting the multiple conductor sets and the conductors to be connected in parallel and adopting the completely symmetrical structure on the magnetic circuit through the winding structure, the problem of loop current generated by the asymmetrical structure is solved, the torque fluctuation is reduced, the noise is reduced, the manufacturing procedure is simplified, the production cost is reduced, and the processing efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

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

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

fig. 3 is a schematic structural diagram of a fourth conductor set according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a conductor of a first conductor set according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a conductor of a second conductor set according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a conductor of a third conductor set according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a third conductor set according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second conductor set according to a fourth embodiment of the present invention;

fig. 9 is a schematic plan view of the plug end of a phase winding according to an embodiment of the present invention;

fig. 10 is a schematic plane distribution diagram of the plug terminals of a phase winding according to the second embodiment of the present invention;

fig. 11 is a schematic plane distribution diagram of the plug end of a phase winding according to a third embodiment of the present invention;

fig. 12 is a schematic plane distribution diagram of the plug end of a phase winding according to a fourth embodiment of the present invention;

fig. 13 is a schematic plane distribution diagram of the plug end of a phase winding according to an embodiment of the present invention;

fig. 14 is a schematic plane distribution diagram of the plug terminals of a phase winding according to a sixth embodiment of the present invention;

fig. 15 is a schematic plan view of a welding end of a phase winding according to the first to sixth embodiments of the present invention;

fig. 16 is a schematic plane distribution diagram of a phase winding according to a seventh embodiment of the present invention;

fig. 17 is a schematic plan view of a phase winding according to an eighth embodiment of the present invention;

fig. 18 is a schematic plane distribution diagram of a phase winding according to a ninth embodiment of the present invention;

fig. 19 is a schematic diagram of three phase windings connected in a star manner according to an embodiment of the present invention;

fig. 20 is a schematic diagram of three phase windings connected in a delta manner 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 intended to limit a specific order. The embodiments of the present invention can be implemented individually, and can be implemented by combining each other between the embodiments, and the embodiments of the present invention are not limited to this.

In the present application, the pitch is the interval between two groove interiors 301 of the same conductor along the circumferential direction, or the pitch is the sum of the span between the groove interiors 301 corresponding to one welding end of one conductor and the span between the groove interiors 301 corresponding to one welding end of the other conductor; it should be noted that the first layer of the radial inner layer of the stator core in the present application may be the first layer of the inner layer in the axial direction away from the center of the stator core, or may be the first layer of the inner layer in the axial direction close to the center of the stator core.

As shown in fig. 1, an embodiment of the present invention provides a motor stator, including: a stator core 20 having a plurality of slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

as shown in fig. 1 to 2, 9 to 20, 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 and form an even number of layers in the radial direction of the stator core 20, divides each slot into 6 layers distributed in the radial direction according to the number of the inside of the slot that each slot can accommodate in the radial direction of the stator core in the present embodiment (U-phase winding or V-phase winding or W-phase winding); the even number layers may be six, eight, or more even number layers. The motor stator in the embodiment is a motor stator in the hair pin motor.

With reference to fig. 1 to 20, in the stator winding 10 in the first to ninth embodiments of the present embodiment, the stator winding 10 is mounted on the stator core 20, that is, a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, wherein 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; two slots 21 are provided for each pole of the rotor, the number of slots per pole per phase being 2 in the present embodiment, the rotor has twelve poles and is such that for each phase of the three-phase stator winding 10, the number of slots 21 provided in the stator core 20 is equal to 72 (i.e., 2X12X3), the number of slots per pole per phase is two, and then the pole pitch is 2 × 3 is 6, i.e., the pole pitch of the stator winding 2 is six, the number of slots per pole per phase is the total number of slots of the stator/(number of poles × number of phases), the total number of slots of the stator is 72, the number of poles is twelve, and the number of phases is three. It should be noted that the number of poles of the stator winding 2 is not limited to 12, and it only needs to satisfy that the number of corresponding poles is an even number which is greater than 6 and can be evenly divided by 3, and may be 12, 18, 24, or the like; each phase winding of the stator winding is formed by sequentially connecting 3 branches of windings in parallel along the circumferential direction of the stator core.

Further, in the present embodiment, the stator core 20 is formed by stacking a plurality of annular magnetic steel plates to form the stator core axial direction both end faces 25, 26 of the stator core 20 by defining one tooth portion 22 by two adjacent slots 21, and other conventional metal plates may be used instead of the magnetic steel plates.

With reference to fig. 9, in a first embodiment, a first branch winding of the 3 parallel branch windings of each phase winding includes 1 first conductor group, 5 second conductor groups, 4 third conductor groups, and 1 fourth conductor group, a second branch winding of the 3 parallel branch windings of each phase winding includes 1 first conductor group, 5 second conductor groups, 4 third conductor groups, and 1 fourth conductor group, and a third branch winding of the 3 parallel branch windings of each phase winding includes 1 first conductor group, 5 second conductor groups, 4 third conductor groups, and 1 fourth conductor group, that is, at least one branch winding of the 3 parallel branch windings of each phase winding includes 1 first conductor group, a plurality of second conductor groups, a plurality of third conductor groups, and 1 fourth conductor group, with reference to fig. 17, in an eighth embodiment, a first branch winding of the 3 parallel branch windings of each phase winding includes 1 first conductor group, 6 second conductor groups, 3 third conductor groups, 1 fourth conductor group, the third branch winding of the 3 parallel branch windings of each phase winding includes 1 first conductor group, 6 second conductor groups, 4 third conductor groups, 0 fourth conductor group, that is, at least one branch winding of the 3 parallel branch windings of the phase winding includes 1 first conductor group, a plurality of second conductor groups, a plurality of third conductor groups, and accordingly, in combination with fig. 18, in the ninth embodiment, the third branch winding of the 3 parallel branch windings of each phase winding includes 0 first conductor group, 6 second conductor groups, 4 third conductor groups, and 1 fourth conductor group, that is, at least one branch winding of the 3 parallel branch windings of the phase winding includes a plurality of second conductor groups, a plurality of third conductor groups, and 1 fourth conductor group, as shown in fig. 3, fig. 4, Fig. 9 to 18 show that, in the first to ninth embodiments, the first conductor group of each branch winding is located at the sixth radial layer of the stator core, and the fourth conductor group of the branch winding is located at the first radial layer of the stator core;

with reference to fig. 3 to 8, in an embodiment, the first conductor set includes: two identical first conductors 150, each first conductor 150 comprising two slot interiors 301 located in the same radial layer of the stator core at a specified slot pitch, two weld ends 303 respectively located at the second axial end 25 of the stator core and connected with the two slot interiors 301 of the conductor, and a wire insertion end 302 located at the first axial end 26 of the stator core and connected with the two slot interiors 301 of the conductor; two welding ends 303 (both facing to the left) located outside the slot and extending in the same direction, the two welding ends 303 located outside the axial direction 25 of the slot 21 are respectively connected to the two slot interiors 301 of the conductor in the same layer, and the two slot interiors of the first conductor are located in the sixth layer of the radially innermost layer of the stator core, that is, the first conductor group is located in the radially mth layer of the stator core (M is 6 in this embodiment).

In an embodiment, the fourth conductor set includes: each of the fourth large conductor 100A and the fourth small conductor 100B of the fourth conductor group includes two slot interiors 301 located in the same radial layer of the stator core and spaced by a specified slot pitch, two welding ends 303 respectively located at the second axial end 25 of the stator core and connected with the two slot interiors 301 of the conductors, and a wire insertion end 302 located at the first axial end 26 of the stator core and connected with the two slot interiors 301 of the conductors; two welding ends 303 (both right) located outside the slots and extending in the same direction, the two welding ends 303 located outside the axial direction 25 of the slot 21 are respectively connected to the two slot interiors 301 of the conductor in the same layer, and the two slot interiors of each conductor of the fourth conductor group are located in the first layer of the radially innermost layer of the stator core;

in one embodiment, the second conductor set includes: two identical second conductors 350, each second conductor 350 comprising two slot interiors 301 located in two radially adjacent layers of the stator core at a specified slot pitch, two welding ends 303 respectively located at the axial second end 25 of the stator core and connected with the two slot interiors 301 of the conductor, and a wire plugging end 302 located at the axial first end 26 of the stator core and connected with the two slot interiors 301 of the conductor; two welding terminals 303 (extending in opposite directions) located outside the slot and extending in opposite directions, the two welding terminals 303 located at the axially outer 25 end of the slot 21 and connected to the two slot inner portions 301 of the conductor in the same layer.

In embodiment four to embodiment six, the second conductor set includes: a fifth large conductor 300A and a fifth small conductor 300B, each of the fifth large conductor 300A and the fifth small conductor 300B of the second conductor group comprises two slot interiors 301 located in two adjacent layers of the stator core in the radial direction and separated by a specified slot distance, two welding ends 303 respectively located at the second end 25 in the axial direction of the stator core and connected with the two slot interiors 301 of the conductor, and a wire insertion end 302 located at the first end 26 in the axial direction of the stator core and connected with the two slot interiors 301 of the conductor; two welding terminals 303 (extending in opposite directions) located outside the slot and extending in opposite directions, the two welding terminals 303 located at the axially outer 25 end of the slot 21 and connected to the two slot inner portions 301 of the conductor in the same layer.

In an embodiment, the third conductor set includes: the two conductors are arranged, each conductor comprises two slot interiors 301 which are positioned in two adjacent layers of the stator core in the radial direction and are separated by a specified slot distance, two welding ends 303 which are respectively positioned at the second end 25 in the axial direction of the stator core and connected with the two slot interiors 301 of the conductors, and a wire plugging end 302 which is positioned at the first end 26 in the axial direction of the stator core and connected with the two slot interiors 301 of the conductors; two welding terminals 303 (extending in opposite directions) located outside the slot and extending in opposite directions, the two welding terminals 303 located at the axially outer 25 end of the slot 21 and connected to the two slot inner portions 301 of the conductor in the same layer.

Referring to fig. 9 to 16, in the embodiment, the welding end 303 to which the lead wires of the lead wires (U1, U2, U3, U4, U5, U6) of the 3 branch windings of each phase winding are connected is located at the stator core axial first end 26. The winding structure adopts a completely symmetrical structure on a magnetic circuit, eliminates the problem of loop current generated by an asymmetrical structure, reduces torque fluctuation, reduces noise, simplifies manufacturing procedures, reduces production cost and improves processing efficiency.

With reference to fig. 9 to 14, in the first to sixth embodiments, the welding end connected to the outgoing line of each branch winding is located at two radially adjacent layers of the stator core and located at the first circumferential end 26 of the stator core, the welding end connected to the lead end U1 of the first branch winding of each phase winding is located at the 6 th layer of the stator core in the radial direction, and the welding end connected to the outgoing line end U2 of the branch winding is located at the 5 th layer of the stator core in the radial direction; the welding end connected with the lead end U3 of the second branch winding of the phase winding is positioned on the radial 4 th layer of the stator core, and the welding end connected with the wire outlet end U4 of the second branch winding of the phase winding is positioned on the radial 3 rd layer of the stator core; the welding end connected with the lead end U5 of the third branch winding of the phase winding is positioned on the radial 2 nd layer of the stator core, and the welding end connected with the wire outlet end U6 of the third branch winding of the phase winding is positioned on the radial 1 st layer of the stator core; the welding end that 3 branch winding's lead-out wire is connected is located stator core radial adjacent two-layer promptly, and is located stator core axial first end 26, and the welding end that 3 branch winding's of this phase winding lead-out wire is connected all is located radial nth layer, the N +1 th layer of stator core, and the welding end that at least one branch winding's lead-out wire is connected in every phase winding is located radial nth layer of stator core and the N +1 th layer promptly. It should be noted that in the first to sixth embodiments, the welding ends connected by the outgoing lines of the 3 branch windings of each phase winding are all located in the same radial direction of the stator core, but the welding ends connected by the outgoing lines of the 3 branch windings of each phase winding may not be located in the same radial direction of the stator core, as shown in fig. 16, and in the seventh embodiment, the welding ends connected by the outgoing line of the first branch winding of the 3 branch windings of the phase winding and the outgoing lines of the other two branch windings of the phase winding are not located in the same radial direction of the stator core.

As shown in fig. 17, in the eighth embodiment, the welding end to which the lead end U1 of the first branch winding of each phase winding is connected is located at the 6 th layer in the radial direction of the stator core, and the welding end to which the lead end U2 of the branch winding is connected is located at the 6 th layer in the radial direction of the stator core; the welding end connected with the lead end U3 of the second branch winding of the phase winding is positioned on the radial 4 th layer of the stator core, and the welding end connected with the wire outlet end U4 of the branch winding is positioned on the radial 5 th layer of the stator core; the welding end connected with the lead end U5 of the third branch winding of the phase winding is positioned on the radial 2 nd layer of the stator core, and the welding end connected with the wire outlet end U6 of the branch winding is positioned on the radial 3 rd layer of the stator core; that is, the welding end connected by the outgoing line of each branch winding is located at the first axial end 26 of the stator core, the welding end connected by the outgoing line of the third branch winding of the second branch winding of the phase winding is located at the radial N +1 th layer and the N +2 th layer of the stator core, and the welding end connected by the outgoing line of at least one branch winding in each phase winding is located at the radial N +1 th layer and the N +2 th layer of the stator core. It should be noted that in the eighth embodiment, the outgoing lines of the 3 branch windings of the phase winding are all located in the same radial direction of the stator core, but the outgoing lines of the 3 branch windings of each phase winding may not be located in the same radial direction of the stator core, and of course, the outgoing line of the first branch winding in the 3 branch windings of the phase winding and the outgoing lines of the other two branch windings of the phase winding are not located in the same radial direction of the stator core. Further, in the eighth embodiment, the welding end connected with the outgoing line of the first branch winding of the phase winding is located at the 6 th layer in the radial direction of the stator core, that is, the welding end connected with the outgoing line of at least one branch winding in each phase winding is located at the mth layer in the same layer in the radial direction of the stator core.

As shown in fig. 18, in the ninth embodiment, the welding end connected with the lead end U1 of the first branch winding of each phase winding is located at the 4 th radial layer of the stator core, and the welding end connected with the lead end U2 of the branch winding is located at the 5 th radial layer of the stator core; the welding end connected with the lead end U3 of the second branch winding of the phase winding is positioned on the radial 2 nd layer of the stator core, and the welding end connected with the wire outlet end U4 of the branch winding is positioned on the radial 3 rd layer of the stator core; the welding end connected with the lead end U5 of the third branch winding of the phase winding is positioned on the radial 1 st layer of the stator core, and the welding end connected with the wire outlet end U6 of the branch winding is positioned on the radial 1 st layer of the stator core; that is, the welding end connected by the outgoing line of each branch winding is located at the first axial end 26 of the stator core, the welding end connected by the outgoing lines of the first branch winding and the second branch winding of the phase winding is located on the radial N +1 th layer and the N +2 th layer of the stator core, and the welding end connected by the outgoing line of at least one branch winding in each phase winding is located on the radial N +1 th layer and the N +2 th layer of the stator core. It should be noted that in the ninth embodiment, the outgoing lines of the 3 branch windings of the phase winding are all located in the same radial direction of the stator core, but the outgoing lines of the 3 branch windings of each phase winding may not be located in the same radial direction of the stator core, and of course, the outgoing line of the first branch winding in the 3 branch windings of the phase winding and the outgoing lines of the other two branch windings of the phase winding are not located in the same radial direction of the stator core. Further, in the ninth embodiment, the welding ends connected to the outgoing lines of the third branch windings of the phase winding are all located in the first layer of the same radial layer of the stator core, that is, the welding end connected to the outgoing line of at least one branch winding in each phase winding is located in the first radial layer of the stator core.

Each branch winding also comprises two eighth conductors, each eighth conductor comprises an inside slot part 301 and two welding ends 303 which are positioned at the first end 26 and the second end 25 of the axis of the stator core and connected with the inside slot part 301, and the two welding ends positioned at the two ends of the axis of the stator core and the inside slot part are positioned at the same layer of the stator core in the radial direction; the eighth conductor connected with the leading end of each branch winding is positioned at the welding end of the first end 26 of the axis of the stator core, the other eighth conductor connected with the leading end of the branch winding is positioned at the welding end of the first end 26 of the axis of the stator core,

with reference to fig. 9 to 14, in the first to sixth embodiments, each branch winding further includes one conductor of 1 second conductor set, in the first to third embodiments, one conductor of 1 second conductor set is the second conductor 350, in the fourth to sixth embodiments, one conductor of 1 second conductor set is the sixth small conductor 300B, and of course, in the fourth to sixth embodiments, one conductor of 1 second conductor set may also be the sixth large conductor 300A; in the first to sixth embodiments, the in-slot portion 301 corresponding to the welding end connected to the lead end of the first branch winding of each phase winding is located in the 19 th slot of the sixth layer of the stator core and one conductor of one second conductor group is located in one of the 20 th slots of the sixth layer of the stator core and located in two circumferentially adjacent slots of the stator core, the in-slot portion 301 corresponding to the welding end connected to the lead end of the first branch winding of each phase winding is located in the 25 th slot of the fifth layer of the stator core and one conductor of one second conductor group is located in one of the 26 th slot of the fifth layer of the stator core and located in two circumferentially adjacent slots of the stator core, that is, the in-slot portion corresponding to the welding end connected to the lead end of the first branch winding and the in-slot portion corresponding to the two slots of one conductor of one second conductor are located in two circumferentially adjacent slots of the stator core; correspondingly, with reference to fig. 9 to 14, the inside of the slot corresponding to the welding end connected by the lead-out wires of the second branch winding and the third branch winding of the phase winding and the inside of the two slots of one conductor of one second conductor group are located in two circumferentially adjacent slots of the stator core.

With reference to fig. 17, in an eighth embodiment, one of the branch windings of 3 branch windings of each phase winding further includes one conductor of one third conductor group, in a first embodiment, in a fourth embodiment, one conductor of 1 third conductor group of each branch winding is the third conductor 250, in a second embodiment, in a fifth embodiment, one of the branch windings of 3 branch windings of each phase winding includes one conductor of 1 third conductor group is the sixth small conductor 200B, and of course, in a second embodiment, in a fifth embodiment, one of the branch windings of 3 branch windings of each phase winding includes one conductor of 1 third conductor group is the sixth large conductor 200A; in the eighth embodiment, the in-slot portion 301 corresponding to the welding end connected to the leading end of the second branch winding of the phase winding is located in the 31 st slot of the fourth layer of the stator core and one conductor of one third conductor group is located in one slot of the 32 nd slot of the fourth layer of the radial direction of the stator core and is located in two circumferentially adjacent slots of the stator core, the in-slot portion 301 corresponding to the welding end connected to the leading end of the second branch winding of the phase winding is located in the 37 th slot of the fifth layer of the stator core and one conductor of one third conductor group is located in one slot of the 38 th slot of the fifth layer of the stator core and is located in two circumferentially adjacent slots of the stator core, that is, the in-slot portion corresponding to the welding end connected to the leading end of the second branch winding and the two slots of one conductor of one third conductor group are located in two circumferentially adjacent slots of the stator core;

with reference to fig. 17, in an embodiment eight, one of the 3 branch windings of each phase winding includes one conductor of the first conductor group, and one of the 3 branch windings of each phase winding includes one conductor of 1 first conductor group as the first conductor 150, with reference to fig. 17, in an embodiment eight, the weld end of the first branch winding of the phase winding is located in the 31 st slot of the sixth layer of the stator core and one conductor of one first conductor group is located in one of the 32 nd slot of the sixth layer of the stator core and located in two circumferentially adjacent slots of the stator core, the weld end of the first branch winding of the phase winding is located in the 37 th slot of the sixth layer of the stator core and one conductor of one first conductor group is located in one of the 38 th slot of the sixth layer of the stator core and located in two circumferentially adjacent slots of the stator core, namely, the inside of a groove corresponding to a welding end connected with an outgoing line of a first branch winding and the inside of two grooves of a conductor of a first conductor group are positioned in two circumferentially adjacent grooves of the stator core;

with reference to fig. 18, in the ninth embodiment, one conductor of the fourth conductor group included in one of the 3 branch windings of each phase winding, and one conductor of the 1 fourth conductor group included in one of the 3 branch windings of each phase winding is the fourth small conductor 100B, but may also be the fourth large conductor 100A. With reference to fig. 18, the slot interior 301 corresponding to the welding end connected to the leading end of the third branch winding of the phase winding is located in the 37 th slot of the first layer of the stator core and one conductor of one fourth conductor group is located in one slot of the 38 th slot of the first layer of the stator core and located in two circumferentially adjacent slots of the stator core, the slot interior 301 corresponding to the welding end connected to the leading end of the first branch winding of the phase winding is located in the 44 th slot of the first layer of the stator core and one conductor of one fourth conductor group is located in one slot of the 43 th slot of the first layer of the stator core and located in two circumferentially adjacent slots of the stator core, that is, the slot interior corresponding to the welding end connected to the leading end of the third branch winding of the phase winding and two slot interiors of one conductor of one fourth conductor group are located in two circumferentially adjacent slots of the stator core;

further, the first conductor group includes two first conductors, two slot interiors of a first conductor 150 of the first conductor group are located in the 7 th slot and the 13 th slot of the 6 th layer of the stator core, two slot interiors of a second first conductor 150 of the first conductor group are located in the 8 th slot and the 14 th slot of the 6 th layer of the stator core in the radial direction, namely, a pitch between the two slot interiors of the two first conductors of the first conductor group is a full pitch, and the two slot interiors of the two first conductors 150 of the first conductor group are respectively and sequentially located in two circumferentially adjacent slots of the sixth layer of the stator core. The two slot interiors of the fourth large conductor 100A of the fourth conductor group are located in the 13 th slot and the 20 th slot of the first layer in the radial direction of the stator core, the two slot interiors of the fourth small conductor 100B of the fourth conductor group are located in the 14 th slot and the 19 th slot of the first layer in the radial direction of the stator core, namely, the pitch between the two slot interiors of the fourth large conductor of the fourth conductor group is a long pitch 7, the pitch between the two slot interiors of the fourth small conductor of the fourth conductor group is a short pitch 5, and the two slot interiors of the fourth large conductor 100A of the fourth conductor group surround the two slot interiors of the fourth small conductor 100B in the first layer in the circumferential direction of the stator core.

As shown in fig. 9 and fig. 15, in the first embodiment, each phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor sets, that is, 12 identical third conductor sets are included, and when the even number layer is 8, the U-phase winding includes 18 third conductor sets; the phase winding (U-phase winding or V-phase winding or W-phase winding) is provided with a plurality of first connecting and welding ends and second connecting and welding ends which are connected together, the welding end positioned on a first layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a second layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a third layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a fourth layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a fifth layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a sixth layer in the radial direction of the stator core is a second connecting and welding end, and the sum of the span of the first connecting and the span of the second connecting and welding ends which are adjacent in the same; specifically, the pitch of the connection between the first connection welding end of one first conductor 150 or one second conductor 350 located in the same radial sixth layer of the stator core and the second connection welding end of one second conductor 350 or one third conductor 250 located in the same radial adjacent fifth layer of the stator core is the whole pitch 6, the pitch of the connection between the first connection welding end of the other welding end of one second conductor 350 or one third conductor 250 located in the same radial fourth layer of the stator core and the second connection welding end of one second conductor 350 or one third conductor 250 located in the same radial adjacent third layer of the stator core is the whole pitch 6, and the first connection welding end of the other welding end of one second conductor 350 or one third conductor 250 located in the same radial second layer of the stator core and the second conductor 350 or one fourth large conductor 100A or one third large conductor 100A located in the same radial adjacent first layer of the stator core The pitch at which the second connection solder terminal of one solder terminal of the fourth small conductor 100B is connected is the entire pitch 6; the two conductors of the second conductor group are the same second conductors, and the second conductors of the second conductor group are located in the first layer and the second layer, the third layer and the fourth layer in the radial direction of the stator core, the two groove interiors of the first second conductor 350 of the second conductor group are respectively located in the grooves 1 and 7, the two groove interiors of the second conductor 350 of the second conductor group are respectively located in the grooves 2 and 8, namely, the pitch between the two groove interiors of the second conductors is the whole pitch 6; the two conductors of the third conductor group are the same third conductor 250, and the third conductor of the third conductor group is located at the third layer and the second layer in the radial direction of the stator core, the two inside slots of the first third conductor 250 of the third conductor group are located in the core slots 19 and 25, the two inside slots of the second third conductor 250 of the third conductor group are located in the core slots 20 and 26, that is, the pitch between the two inside slots of the third conductor 250 is the whole pitch.

As shown in fig. 10 and fig. 15, in the second embodiment, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, the 12 third conductor groups are the same, and when the even-numbered layer is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) is provided with a plurality of first connecting and welding ends and second connecting and welding ends which are connected together, the welding end positioned on a first layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a second layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a third layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a fourth layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a fifth layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a sixth layer in the radial direction of the stator core is a second connecting and welding end, and the sum of the span of the first connecting and the span of the second connecting and welding ends which are adjacent in the same; specifically, the pitch of the connection between the first connection welding end of one first conductor 150 or one second conductor 350 located in the same radial sixth layer of the stator core and the second connection welding end of one second conductor 350 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial adjacent fifth layer of the stator core is the whole pitch 6, and the pitch of the connection between the first connection welding end of the other welding end of one second conductor 350 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial fourth layer of the stator core and the second connection welding end of one second conductor 350 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial adjacent third layer of the stator core is the whole pitch 6; the pitch of the connection between the first connection welding end of the other welding end of one second conductor 350 or one sixth large conductor 200A or one sixth small conductor 200B positioned on the same radial second layer of the stator core and the second connection welding end of one second conductor 350 or one fourth large conductor 100A or one fourth small conductor 100B positioned on the same radial adjacent first layer of the stator core is the whole pitch 6; the two conductors of the second conductor group are the same second conductors, and the second conductors of the second conductor group are located in the first layer and the second layer, the third layer and the fourth layer in the radial direction of the stator core, the two groove interiors of the first second conductor 350 of the second conductor group are respectively located in the grooves 1 and 7, the two groove interiors of the second conductor 350 of the second conductor group are respectively located in the grooves 2 and 8, namely, the pitch between the two groove interiors of the second conductors is the whole pitch 6; the two conductors of the third conductor group are different sixth large conductors 200A and sixth small conductors 200B, and the two conductors of the third conductor group are located in the third layer and the second layer in the radial direction of the stator core, the two slot interiors of the sixth large conductors 200A of the third conductor group are respectively located in the core slots 19 and 26, the two slot interiors of the sixth small conductors 200B of the third conductor group are respectively located in the core slots 20 and 25, that is, the pitch between the two slot interiors of the sixth large conductors 200A is a long pitch, the pitch between the two slot interiors of the sixth small conductors 200B is a short pitch, and the two slot interiors of the sixth large conductors 200A of the third conductor group surround the sixth small conductors 200B of the third conductor group.

As shown in fig. 11 and fig. 15, in the third embodiment, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, the 12 third conductor groups are different, and when the even-numbered layer is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) is provided with a plurality of first connecting and welding ends and second connecting and welding ends which are connected together, the welding end positioned on a first layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a second layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a third layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a fourth layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a fifth layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a sixth layer in the radial direction of the stator core is a second connecting and welding end, and the sum of the span of the first connecting and the span of the second connecting and welding ends which are adjacent in the same; specifically, the pitch of the connection between the first connection welding end of one first conductor 150 or one second conductor 350 located in the same radial sixth layer of the stator core and the second connection welding end of one second conductor 350 or one third conductor 250 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial adjacent fifth layer of the stator core is the whole pitch 6, and the pitch of the connection between the first connection welding end of the other welding end of one second conductor 350 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial fourth layer of the stator core and the second connection welding end of one second conductor 350 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial adjacent third layer of the stator core is the whole pitch 6; the pitch of the connection between the first connection welding end of the other welding end of one second conductor 350 or one sixth large conductor 200A or one sixth small conductor 200B positioned on the same radial second layer of the stator core and the second connection welding end of one second conductor 350 or one fourth large conductor 100A or one fourth small conductor 100B positioned on the same radial adjacent first layer of the stator core is the whole pitch 6; the two conductors of the second conductor group are the same second conductors, and the second conductors of the second conductor group are located in the first layer and the second layer, the third layer and the fourth layer in the radial direction of the stator core, the two groove interiors of the first second conductor 350 of the second conductor group are respectively located in the grooves 1 and 7, the two groove interiors of the second conductor 350 of the second conductor group are respectively located in the grooves 2 and 8, namely, the pitch between the two groove interiors of the second conductors is the whole pitch 6; the two conductors of the first third conductor group are the sixth large conductor 200A and the sixth small conductor 200B which are different, and the two conductors of the third conductor group are located in the third layer and the second layer in the radial direction of the stator core, the two slot interiors of the sixth large conductor 200A of the third conductor group are respectively located in the core slots 19 and 26, the two slot interiors of the sixth small conductor 200B of the third conductor group are respectively located in the core slots 20 and 25, namely, the pitch between the two slot interiors of the sixth large conductor 200A is a long pitch, the pitch between the two slot interiors of the sixth small conductor 200B is a short pitch, and the two slot interiors of the sixth large conductor 200A of the third conductor group surround the sixth small conductor 200B of the third conductor group; the same 6 second third conductor sets, wherein the two conductors of the first third conductor set are the same third conductor 250, and the third conductor of the third conductor set is located at the third layer and the second layer in the radial direction of the stator core, the two slot interiors of the first third conductor 250 of the third conductor set are located in the core slots 19 and 25, and the two slot interiors of the second third conductor 250 of the third conductor set are located in the core slots 20 and 26, i.e. the pitch between the two slot interiors of the third conductor 250 is a full pitch.

As shown in fig. 12 and fig. 15, in the fourth embodiment, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, the 12 third conductor groups are the same, and when the even-numbered layer is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) is provided with a plurality of first connecting and welding ends and second connecting and welding ends which are connected together, the welding end positioned on a first layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a second layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a third layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a fourth layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a fifth layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a sixth layer in the radial direction of the stator core is a second connecting and welding end, and the sum of the span of the first connecting and the span of the second connecting and welding ends which are adjacent in the same; specifically, the pitch of the first connecting weld end of one first conductor 150 or one fifth large conductor 300A or one fifth small conductor 300B located in the same radial sixth layer of the stator core and the second connecting weld end of one fifth large conductor 300A or one fifth small conductor 300B or one third conductor 250 located in the same radial adjacent fifth layer of the stator core is the whole pitch 6, the pitch of the first connecting weld end of one fifth large conductor 300A or one fifth small conductor 300B or one third conductor 250 located in the same radial fourth layer of the stator core and the second connecting weld end of one fifth large conductor 300A or one fifth small conductor 300B or one third conductor 250 located in the same radial adjacent third layer of the stator core is the whole pitch 6, and the first connecting weld end of one fifth large conductor 300A or one fifth small conductor 300B or one third small conductor 250 located in the same radial second layer of the stator core and the The pitch of the connection between the first connecting weld end of the other weld end of the stator core and the second connecting weld end of one weld end of a fifth large conductor 300A or a fifth small conductor 300B or a fourth large conductor 100A or a fourth small conductor 100B located in the same radial adjacent first layer of the stator core is a whole pitch of 6; the second conductor group is two different fifth large conductors and fifth small conductors, the conductors of the second conductor group are positioned on the first layer and the second layer, the third layer and the fourth layer of the stator core in the radial direction, the two groove interiors of the fifth large conductors of the second conductor group are respectively positioned in the core grooves 1 and 8, the two groove interiors of the fifth small conductors of the second conductor group are respectively positioned in the grooves 2 and 7, namely, the pitch between the two groove interiors of the fifth large conductors is a long pitch 7, and the pitch between the two groove interiors of the fifth small conductors is a short pitch 5; the two conductors of the third conductor group are the same third conductor 250, and the third conductor of the third conductor group is located at the third layer and the second layer in the radial direction of the stator core, the two inside slots of the first third conductor 250 of the third conductor group are located in the core slots 19 and 25, the two inside slots of the second third conductor 250 of the third conductor group are located in the core slots 20 and 26, that is, the pitch between the two inside slots of the third conductor 250 is the whole pitch.

As shown in fig. 13 and 15, in the fifth embodiment, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, the 12 third conductor groups are the same, and when the even-numbered layer is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) is provided with a plurality of first connecting and welding ends and second connecting and welding ends which are connected together, the welding end positioned on a first layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a second layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a third layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a fourth layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a fifth layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a sixth layer in the radial direction of the stator core is a second connecting and welding end, and the sum of the span of the first connecting and the span of the second connecting and welding ends which are adjacent in the same; specifically, the pitch of the first connecting weld end of one first conductor 150 or one fifth large conductor 300A or one sixth small conductor 300B located in the same radial sixth layer of the stator core and the second connecting weld end of one fifth large conductor 300A or one fifth small conductor 300B or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial adjacent fifth layer of the stator core is the whole pitch 6, and the pitch of the first connecting weld end of one fifth large conductor 300A or one fifth small conductor 300B or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial fourth layer of the stator core and the second connecting weld end of one fifth large conductor 300A or one fifth small conductor 300B or one sixth small conductor 200A or one sixth small conductor 200B located in the same radial adjacent third layer of the stator core is the whole pitch 6 A distance 6, wherein the pitch of the connection between the first connection welding end of the other welding end of one fifth large conductor 300A or one fifth small conductor 300B or one sixth large conductor 200A or one sixth small conductor 200B positioned on the same radial second layer of the stator core and the second connection welding end of one welding end of the fifth large conductor 300A or one fifth small conductor 300B or one fourth large conductor 100A or one fourth small conductor 100B positioned on the same radial adjacent first layer of the stator core is a whole pitch 6; the second conductor group is two different fifth large conductors and fifth small conductors, the conductors of the second conductor group are positioned on the first layer and the second layer, the third layer and the fourth layer of the stator core in the radial direction, the two groove interiors of the fifth large conductors of the second conductor group are respectively positioned in the grooves 1 and 8, the two groove interiors of the fifth small conductors of the second conductor group are respectively positioned in the grooves 2 and 7, namely, the pitch between the two groove interiors of the fifth large conductors is a long pitch 7, and the pitch between the two groove interiors of the fifth small conductors is a short pitch 5; the two conductors of the third conductor group are the sixth large conductor 200A and the sixth small conductor 200B which are different, and the two conductors of the third conductor group are located on the third layer and the second layer in the radial direction of the stator core, the two inside slots of the sixth large conductor 200A of the third conductor group are respectively located in the core slots 19 and 26, the two inside slots of the sixth small conductor 200B of the third conductor group are respectively located in the core slots 20 and 25, that is, the pitch between the two inside slots of the sixth large conductor 200A is a long pitch, the pitch between the two inside slots of the sixth small conductor 200B is a short pitch, and the two inside slots of the sixth large conductor 200A of the third conductor group surround the sixth small conductor 200B of the third conductor group.

With reference to fig. 14 and 15, in a sixth embodiment, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, the 12 third conductor groups are different, and when the even-numbered layer is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) is provided with a plurality of first connecting and welding ends and second connecting and welding ends which are connected together, the welding end positioned on a first layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a second layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a third layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a fourth layer in the radial direction of the stator core is a second connecting and welding end, the welding end positioned on a fifth layer in the radial direction of the stator core is a first connecting and welding end, the welding end positioned on a sixth layer in the radial direction of the stator core is a second connecting and welding end, and the sum of the span of the first connecting and the span of the second connecting and welding ends which are adjacent in the same; specifically, the pitch of the first connection welding end of one first conductor 150 or one fifth large conductor 300A or one fifth small conductor 300B located in the same radial sixth layer of the stator core and the second connection welding end of one fifth large conductor 300A or one fifth small conductor 300B or one third conductor 250 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial adjacent fifth layer of the stator core is the whole pitch 6, and the first connection welding end of one fifth large conductor 300A or one fifth small conductor 300B or one third conductor 250 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial fourth layer of the stator core and one fifth large conductor 300A or one fifth small conductor 300B or one third conductor 250 or one sixth large conductor 200A or one sixth small conductor 200B located in the same radial adjacent third layer of the stator core and the fifth large conductor 300A or one fifth small conductor 300B or one third conductor 250 or one sixth large conductor 200A or one sixth small conductor 200B The connecting pitch of the second connecting welding end of one welding end of the conductor B is the whole pitch 6, and the connecting pitch of the first connecting welding end of the other welding end of one fifth large conductor 300A or one fifth small conductor 300B or one sixth large conductor 200A or one sixth small conductor 200B positioned on the same radial second layer of the stator core and the second connecting welding end of one fifth large conductor 300A or one fifth small conductor 300B or one fourth large conductor 100A or one fourth small conductor 100B positioned on the same radial adjacent first layer of the stator core is the whole pitch 6; the second conductor group is two different fifth large conductors and fifth small conductors, the conductors of the second conductor group are positioned on the first layer and the second layer, the third layer and the fourth layer of the stator core in the radial direction, the two groove interiors of the fifth large conductors of the second conductor group are respectively positioned in the grooves 1 and 8, the two groove interiors of the fifth small conductors of the second conductor group are respectively positioned in the grooves 2 and 7, namely, the pitch between the two groove interiors of the fifth large conductors is a long pitch 7, and the pitch between the two groove interiors of the fifth small conductors is a short pitch 5; the two conductors of the first third conductor group are different sixth large conductors 200A, the conductors of the third conductor group are located in a third layer and a second layer in the radial direction of the stator core, and the conductors of the third conductor group are located in the iron core slots 19 and 26 respectively, the two slot interiors of the sixth large conductors 200A of the third conductor group are located in the iron core slots 20 and 25 respectively, namely, the pitch between the two slot interiors of the sixth large conductors 200A is a long pitch, the pitch between the two slot interiors of the sixth small conductors 200B is a short pitch, and the two slot interiors of the sixth large conductors 200A of the third conductor group surround the sixth small conductors 200B of the third conductor group; and the same 6 second third conductor groups, wherein two conductors of the second third conductor group are the same third conductor 250, and the third conductor of the third conductor group is positioned at the third layer and the second layer in the radial direction of the stator core, two groove interiors of the first third conductor 250 of the third conductor group are positioned in the core grooves 25 and 31, and two groove interiors of the second third conductor 250 of the third conductor group are positioned in the core grooves 26 and 32, namely, the pitch between the two groove interiors of the third conductor 250 is the whole pitch.

Exemplarily, as shown in fig. 19, a star connection of the series windings of the motor, and as shown in fig. 20, a delta connection of the series windings of the motor.

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

The embodiment of the utility model provides a motor includes the motor stator in above-mentioned embodiment, consequently the embodiment of the utility model provides a motor also possesses the beneficial effect that the above-mentioned embodiment described, no longer gives unnecessary details here.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; 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. The above-described meaning of what is specifically intended in the present invention can be understood in specific instances by those of ordinary skill in the art. Finally, it should be noted that the above description is only a preferred embodiment of the present invention and the technical principles applied.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (12)

1. An electric machine stator comprising:

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

a stator winding having a number of slots per pole per phase of 2, the stator winding including a plurality of phase windings mounted on the stator core so as to be different in electrical phase from each other;

the method is characterized in that: each phase winding is formed by sequentially connecting three branch windings in parallel along the circumferential direction of the stator core;

at least one branch winding of the three branch windings of each of the phase windings comprises: at least one branch winding of the 1 first conductor set, the plurality of second conductor sets, the plurality of third conductor sets, the 1 fourth conductor set, or the three branch windings of each of the phase windings comprises: at least one branch winding of the plurality of second conductor sets, the plurality of third conductor sets, the 1 fourth conductor set, or the three branch windings of each of the phase windings comprises: 1 first conductor set, a plurality of second conductor sets, a plurality of third conductor sets;

dividing each slot into M layers distributed along the radial direction according to the number of the slots capable of being accommodated in the radial direction of the stator core, wherein M is an even number which is more than or equal to 6,

the first conductor group of each branch winding is positioned on the radial Mth layer of the stator core, and the fourth conductor group of the branch winding is positioned on the radial first layer of the stator core;

each of the conductor sets includes a plurality of conductors, the conductors of each of the conductor sets including: the stator core is positioned in two slots which are separated by a specified slot distance, two welding ends which are positioned in two slots of which the axial second end of the stator core is connected with the conductor, and wire plugging ends which are positioned in two slots of which the axial first end of the stator core is connected with the conductor;

and the welding end connected with the outgoing line of each branch winding of each phase winding is positioned at the first axial end of the stator core.

2. The motor stator according to claim 1, wherein the welding ends connected to the at least one branch winding lead-out wire of each phase winding are located at two radially adjacent layers of the stator core, the welding ends connected to the lead-out wires of the at least one branch winding are located at the nth and N +1 layers of the stator core in the radial direction, or the welding ends connected to the lead-out wires of the at least one branch winding are located at the N +1 and N +2 layers of the stator core in the radial direction, and N is an odd number.

3. The stator for an electric motor according to claim 1, wherein the welded end to which the lead-out wire of at least one of the branch windings of each of the phase windings is connected is located at an mth layer or a first layer of the same layer in a radial direction of the stator core.

4. A stator according to any one of claims 2 to 3, wherein one of the branch windings of each of said phase windings further comprises a conductor of said first conductor set, or one of the branch windings of each of said phase windings further comprises a conductor of said second conductor set, or one of the branch windings of each of said phase windings further comprises a conductor of said third conductor set, or one of the branch windings of each of said phase windings further comprises a conductor of said fourth conductor set.

5. The stator according to claim 4, wherein the inside of the slot corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two slots of one conductor of one second conductor group are located in two circumferentially adjacent slots of the stator core; and/or the inside of a groove corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two grooves of one conductor of one third conductor group are positioned in two circumferentially adjacent grooves of the stator core.

6. The stator according to claim 4, wherein the inside of the slot corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two slots of one conductor of one first conductor group are located in two circumferentially adjacent slots of the stator core; and/or the inside of a groove corresponding to the welding end connected with the outgoing line of at least one branch winding in each phase winding and the inside of two grooves of one conductor of one fourth conductor group are positioned in two circumferentially adjacent grooves of the stator core.

7. The electric machine stator according to any one of claims 5 to 6, wherein the first conductor group includes two first conductors each having a pitch between two slot interiors of a full pitch; the fourth conductor group comprises a fourth large conductor and a fourth small conductor, the pitch between the two groove interiors of the fourth large conductor is a long pitch, and the pitch between the two groove interiors of the fourth small conductor is a short pitch.

8. The electric machine stator of claim 7, wherein the second conductor set comprises: a fifth large conductor and a fifth small conductor, or the second conductor set includes: two identical second conductors; the two slot interiors of each conductor of the second conductor group are respectively positioned in the Nth layer and the (N + 1) th layer which are adjacent to the stator core in the radial direction, wherein N is an odd number;

the third conductor set includes: and the two groove interiors of each conductor of the third conductor group are respectively positioned in the (N + 1) th layer and the (N + 2) th layer which are radially adjacent to the stator core.

9. The electric machine stator according to claim 8, wherein a pitch between two groove insides of a fifth large conductor of the second conductor group is a long pitch, and a pitch between two groove insides of a fifth small conductor of the second conductor group is a short pitch; the two conductors of the third conductor group are the same third conductor, and the pitch between the two groove interiors of the third conductor is a full pitch, and/or the two conductors of the third conductor group are a sixth large conductor and a sixth small conductor, the pitch between the two groove interiors of the sixth large conductor is a long pitch, and the pitch between the two groove interiors of the sixth small conductor is a short pitch.

10. The electric machine stator of claim 8, wherein the pitch between the two slot interiors of the second conductors of the second conductor set is a full pitch; the two conductors of the third conductor group are the same third conductor, and the pitch between the two groove interiors of the third conductor is a full pitch, and/or the two conductors of the third conductor group are a sixth large conductor and a sixth small conductor, the pitch between the two groove interiors of the sixth large conductor is a long pitch, and the pitch between the two groove interiors of the sixth small conductor is a short pitch.

11. The electric machine stator according to any one of claims 9 to 10, wherein the phase winding has a plurality of first connection weld ends and a plurality of second connection weld ends connected together, the weld ends of the same radially adjacent M-1 th layer at the axial second end of the stator core are the first connection weld ends, the weld ends of the same radially adjacent M-th layer at the axial second end of the stator core are the second connection weld ends, the sum of the span of the first connection weld ends and the span of the second connection weld ends is 6, and M is an even number.

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

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