CN112436618A

CN112436618A - Motor stator and motor

Info

Publication number: CN112436618A
Application number: CN202011419973.0A
Authority: CN
Inventors: 于新昌
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-03-02

Abstract

The invention provides a motor stator and a motor, wherein a stator winding comprises a plurality of phase windings arranged on a stator core, and M layers are formed in the radial direction of the stator core; each phase winding is formed by a plurality of conductors along the circumferential direction of the stator core and connected with a plurality of branch windings in parallel; each branch winding at least comprises a first conductor, the inner parts of two slots of the first conductor are positioned on the first layer and the Mth layer in the radial direction of the stator core, and the inner parts of two slots of the other conductors except the first conductor in the branch winding are positioned on two layers adjacent to the stator core in the radial direction; the other conductors of each branch winding comprise Q conductors I, a plurality of conductors II and a plurality of conductors III, and the two slot interiors of each conductor in the conductors I, the conductors II and the conductors III are respectively positioned on the radial Nth layer and the (N + 1) th layer of the stator core; by adopting the technical scheme, the gap bridge wire is omitted, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the process is simplified, and the processing 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

The stator winding comprises a plurality of hairpin coils, the hairpin coils penetrate into the slots of the stator core according to a certain arrangement mode to form a single-phase winding or a multi-phase winding of a required motor, the hairpin coils used in the prior art are more in variety, so that the stator winding needs to use a large amount of bridge wires to connect branches of the windings of each phase, the arrangement mode of the stator winding is complex, the forming is difficult, the production cost is high, and the processing efficiency is low.

Disclosure of Invention

The invention mainly aims to provide a motor stator and a motor, wherein a gap bridge wire is omitted, heat dissipation is uniform, power and torque are improved, a wiring mode is simplified, a process is simplified, and machining efficiency is improved.

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 the stator core and forming M layers in a radial direction of the stator core;

each phase winding is formed by a plurality of conductors along the circumferential direction of the stator core, and X branch windings are connected in parallel;

each branch winding at least comprises a first conductor, the inner parts of two slots of the first conductor are positioned on a first layer and an Mth layer in the radial direction of the stator core, the inner parts of two slots of the other conductors except the first conductor in the branch winding are positioned on two layers which are adjacent in the radial direction of the stator core, and M is an even number which is more than or equal to 4;

the other conductors of each branch winding comprise Q first conductors, a plurality of second conductors and a plurality of fourth conductors, the two slot interiors of each conductor in the first conductors, the second conductors and the fourth conductors are respectively positioned on the radial Nth layer and the (N + 1) th layer of the stator core, wherein N is an odd number which is more than or equal to 1, and Q is more than or equal to zero;

conductor four of each phase winding is located in the same pole of the stator winding as the first conductor, the pitch of conductor four is different from the pitch of conductor one, and/or the pitch of conductor four is different from the pitch of conductor two.

Furthermore, the outgoing line of each branch winding is located at two layers of the stator core which are adjacent in the radial direction.

Further, the pitch of the conductor four of each branch winding is equal to the pole pitch of the stator winding, or the pitch of the conductor two of each branch winding is equal to the pole pitch of the stator winding and Q in the branch winding is equal to zero.

Further, when the pitch of the conductor four of each branch winding is equal to the pole pitch of the stator winding, the pitch of the conductor one of the branch winding is larger than the pole pitch of the stator winding, and the pitch of the conductor two of the branch winding is smaller than the pole pitch of the stator winding;

or when the pitch of the second conductor of each branch winding is equal to the pole pitch of the stator winding, the pitch of the fourth conductor of the branch winding is smaller than the pole pitch of the stator winding.

Furthermore, the other conductors of each branch winding also include a third conductor, the two slots of the third conductor are positioned on the N +1 th layer and the N +2 th layer of the stator core, and the third conductor and the first conductor are positioned in the same magnetic pole of the stator winding.

Further, one welding end of the conductor four in each branch winding is connected with one welding end of the conductor one in a circumferential wave winding mode, and/or one welding end of the conductor four in each branch winding is connected with one welding end of the conductor two in a circumferential wave winding mode.

Further, one welding end of the conductor three in each branch winding is connected with one welding end of the conductor one in a circumferential wave winding mode, or one welding end of the conductor three in each branch winding is connected with one welding end of the conductor two in a circumferential wave winding mode.

Further, the number of the conductor pitches in each branch winding, which are equal to the pole distances, is less than or equal to the number of the conductor pitches in the branch winding, which is greater than the sum of the pole distances and the conductor pitches, which are less than the pole distances.

Further, the pitch of the first conductor of each branch winding is a long pitch, the pitch of the second conductor of the branch winding is a short pitch, the pitch of the fourth conductor of the branch winding is a full pitch, the pitch of the first conductor of the branch winding is a long pitch, and the pitch of the third conductor of the branch winding is a short pitch.

Further, the pitch of the first conductor of each branch winding is a long pitch, the pitch of the second conductor of the branch winding is a short pitch, the pitch of the fourth conductor of the branch winding is a full pitch, the pitch of the first conductor of the branch winding is a full pitch, and the pitch of the third conductor of the branch winding is a full pitch.

Further, the pitch of the first conductor of each branch winding is a long pitch, the pitch of the second conductor of the branch winding is a short pitch, the pitch of the fourth conductor of the branch winding is a full pitch, the pitch of the first conductor of the branch winding is a long pitch, and the pitch of the third conductor of the branch winding is a long pitch and a short pitch.

Further, the pitch of the first conductor of each branch winding is a long pitch, the pitch of the second conductor of the branch winding is a short pitch, the pitch of the fourth conductor of the branch winding is a full pitch, the pitch of the first conductor of the branch winding is a long pitch, and the pitch of the third conductor of the branch winding is a full pitch and a short pitch.

Further, the pitch of the first conductor of each branch winding is a long pitch, the pitch of the second conductor of the branch winding is a short pitch, the pitch of the fourth conductor of the branch winding is a full pitch, the pitch of the first conductor of the branch winding is a full pitch, and the pitch of the third conductor of the branch winding is a long pitch and a short pitch.

Further, the pitch of the second conductor of each branch winding is a full pitch, the pitch of the fourth conductor of the branch winding is a short pitch, the pitch of the first conductor of the branch winding is a long pitch, and the pitch of the third conductor of the branch winding is a long pitch.

Furthermore, the outlet end of the first branch winding of the X branch windings of each phase winding is connected in series with the lead end of the other branch winding of the X/2+1 th branch winding of the phase winding to form X/2 parallel branch windings.

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

By applying the technical scheme of the invention, the motor stator comprises: 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 the stator core and forming M layers in a radial direction of the stator core; each phase winding is formed by a plurality of conductors along the circumferential direction of the stator core, and X branch windings are connected in parallel; each branch winding at least comprises a first conductor, the inner parts of two slots of the first conductor are positioned on a first layer and an Mth layer in the radial direction of the stator core, the inner parts of two slots of the other conductors except the first conductor in the branch winding are positioned on two layers which are adjacent in the radial direction of the stator core, and M is an even number which is more than or equal to 4; the other conductors of each branch winding comprise Q first conductors, a plurality of second conductors and a plurality of fourth conductors, the two slot interiors of each conductor in the first conductors, the second conductors and the fourth conductors are respectively positioned on the radial Nth layer and the (N + 1) th layer of the stator core, wherein N is an odd number which is more than or equal to 1, and Q is more than or equal to zero; conductor four of each phase winding is located in the same pole of the stator winding as the first conductor, the pitch of conductor four is different from the pitch of conductor one, and/or the pitch of conductor four is different from the pitch of conductor two. According to the technical scheme, the gap bridge wire is omitted, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the process is simplified, and the processing 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 diagram of a phase winding of a stator winding according to one embodiment of the present invention;

FIG. 3 is a partial schematic diagram of a phase winding according to one embodiment of the present invention;

FIG. 4 is a schematic diagram of a conductor structure in an embodiment of the 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 plan view of a branch winding in a phase winding according to an embodiment of the present invention;

FIG. 7 is a schematic plan view of a phase winding according to a second embodiment of the present invention;

FIG. 8 is a schematic plane development of a branch winding in the phase winding according to the second embodiment of the present invention;

FIG. 9 is a schematic plan view of a phase winding in a third embodiment of the present invention;

FIG. 10 is a schematic plane development of a branch winding in a phase winding in accordance with a third embodiment of the present invention;

fig. 11 is a schematic plan view of a phase winding in a fourth embodiment of the present invention;

FIG. 12 is a schematic diagram of a planar development of a branch winding in a phase winding in accordance with a fourth embodiment of the present invention;

FIG. 13 is a schematic plan view of a phase winding in a fifth embodiment of the present invention;

FIG. 14 is a schematic plan view of a branch winding in a fifth phase winding according to an embodiment of the present invention;

fig. 15 is a schematic plan view of a phase winding in a sixth embodiment of the present invention;

FIG. 16 is a schematic plan view of a branch winding in a six-phase winding according to an embodiment of the present invention;

fig. 17 is a schematic plan-view development of a phase winding in a seventh embodiment of the invention;

FIG. 18 is a schematic plane development of one branch winding in the seven phase windings according to the embodiment of the present invention;

fig. 19 is a schematic plan view of a phase winding in an eighth 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. In the present application, the pitch is the interval between two groove interiors 501 of the same conductor along the circumferential direction, or the pitch is the sum of the span between the groove interiors 501 corresponding to one welding end of one conductor and the span between the groove interiors 501 corresponding to one welding end of another conductor; 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 19, 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, forms M layers in the radial direction of the stator core for the phase windings (U-phase winding or V-phase winding or W-phase winding) in the present embodiment; the even number of M layers may be four, six, eight, or more. The motor stator in the embodiment is a motor stator in the hair pin motor.

Referring to fig. 1 to 19, in the stator winding 10 in 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, 2 slots per pole per phase in the present embodiment, the rotor having eight poles and doing so for each phase of the three-phase stator winding 10, the number of slots 21 provided in the stator core 20 being equal to 48 (i.e., 2X8X3), the pole pitch being the number of phases per stator winding X slots per pole per phase, the conductors having a pitch less than the pole pitch being short-pitch conductors, the conductors having a pitch equal to the pole pitch being full-pitch conductors, the conductors having a pitch greater than the pole pitch being long-pitch conductors, in the present embodiment the pole pitch being 2X3 being 6; in this application, the first conductor 150A is a long-pitch conductor, the second conductor 150 is a full-pitch conductor, the second conductor 150B is a short-pitch conductor, the first conductor 200A is a long-pitch conductor, the first conductor 200 is a full-pitch conductor, the third conductor 300A is a long-pitch conductor, the third conductor 300B is a full-pitch conductor, the third conductor 300B is a short-pitch conductor, the fourth conductor 400B is a short-pitch conductor, and the fourth conductor 400 is a full-pitch conductor, in addition, in the present embodiment, the stator core 20 defines one toothed stator core 20 by two adjacent slots 21, and the two end faces of the stator core in the axial direction are formed by stacking a plurality of annular magnetic steel plates, and other conventional metal plates can be used instead of the magnetic steel plates.

As shown in fig. 5 to 19, in the first to eighth embodiments, each phase winding (U-phase winding, V-phase winding, W-phase winding) includes a plurality of first conductors, a plurality of first conductors (or 0 first conductors), a plurality of second conductors, a plurality of third conductors, and a plurality of fourth conductors, and forms 4 branch windings connected in parallel along the circumferential direction of the stator core; in the first to third embodiments, the fifth to seventh embodiments, and the eighth embodiment, each branch winding includes at least one first conductor, a plurality of first conductors, a plurality of second conductors, a plurality of third conductors, and a plurality of fourth conductors connected in series along the circumferential direction of the stator core; in the fourth embodiment, each branch winding comprises at least one first conductor, a plurality of second conductors, a plurality of third conductors and a plurality of fourth conductors which are connected in series along the circumferential direction of the stator core; with reference to fig. 4, each conductor includes a welding terminal 503, an in-slot portion 501, a plug terminal 502, an in-slot portion 501 and a welding terminal 503 which are sequentially connected end to end, the two in-slot portions are located in two slots of the stator core circumferentially spaced by a specified slot distance, one end of the plug terminal located outside the axial slot of the stator core is connected with the two in-slot portions, one end of the two welding terminals located outside the stator core and far away from the plug terminal is connected with the two in-slot portions, the extending directions of the two welding terminals are opposite, and the two welding terminals are located on the same layer corresponding to the two in-slot portions.

As shown in fig. 5 to 12 and 19, in the first to fourth embodiments and the eighth embodiment, the two slot interiors of the first conductor 200 are respectively located at the first and fourth layers (M is equal to 4 at this time) in the radial direction of the stator core, as shown in fig. 13 to 18, in the fifth to seventh embodiments, the two slot interiors of the first conductor 200 are respectively located at the first and eighth layers (M is equal to 8 at this time) in the radial direction of the stator core, in the first embodiment, the two slot interiors of the first conductor 150A are located at two layers adjacent to the radial direction of the stator core, that is, the first and second layers or the third and fourth layers or the fifth and sixth layers or the seventh and eighth layers, the two slot interiors of the second conductor 150B (150) are located at two layers adjacent to the radial direction of the stator core, that is, the first and second layers or the third and fourth layers or the fifth and sixth layers or the seventh and eighth layers, and the fourth conductor 400B is located at two slots adjacent to the radial direction of the stator core, namely, a first layer and a second layer or a third layer and a fourth layer or a fifth layer and a sixth layer or a seventh layer and an eighth layer (in this embodiment, N is 1, 3, 5, 7);

as shown in fig. 3, 5, 7, 9, 11, 13, 15, and 17, in the first to eighth embodiments, the conductor four 400 and the first conductor 200A in each phase winding are located in the same magnetic pole of the stator winding, and in the first to eighth embodiments, in combination with fig. 5 and 19, the second magnetic pole of the stator winding is located in the 7 th to 14 th slots in the circumferential direction of the stator core, the conductor four 400 in the phase winding is located in the 7 th to 13 th slots in the circumferential direction of the stator core, and the first conductor 200A in the phase winding is also located in the 7 th to 14 th slots in the circumferential direction of the stator core, that is, the conductor four and the first conductor of the phase winding are located in the same magnetic pole of the stator winding; with reference to fig. 7, in the second embodiment, the second magnetic pole of the stator winding is located in the 7 th to 15 th slots in the circumferential direction of the stator core, the conductor four 400 in the phase winding is located in the 8 th to 14 th slots in the circumferential direction of the stator core, and the first conductor 200A in the phase winding is also located in the 7 th to 15 th slots in the circumferential direction of the stator core, that is, the conductor four and the first conductor in the phase winding are located in the same magnetic pole of the stator winding; with reference to fig. 9, in the third embodiment, the second magnetic pole of the stator winding is located in the 7 th to 15 th slots in the circumferential direction of the stator core, the first conductor four 400 of the phase winding is located in the 7 th to 13 th slots in the circumferential direction of the stator core, the second conductor four 400 of the phase winding is located in the 9 th to 15 th slots in the circumferential direction of the stator core, and the first conductor 200 of the phase winding is also located in the 8 th to 14 th slots in the circumferential direction of the stator core, that is, the conductor four of the phase winding and the first conductor are located in the same magnetic pole of the stator winding; with reference to fig. 11, in the fourth embodiment, the first magnetic pole of the stator winding is located in the 1 st to 8 th slots in the circumferential direction of the stator core, the conductor four 400B in the phase winding is located in the 1 st to 8 th slots in the circumferential direction of the stator core, and the first conductor 200A in the phase winding is also located in the 1 st to 8 th slots in the circumferential direction of the stator core, that is, the conductor four and the first conductor in the phase winding are located in the same magnetic pole of the stator winding; with reference to fig. 13, in the fifth embodiment, the second magnetic poles of the stator winding are located in the 7 th to 14 th slots in the circumferential direction of the stator core, the conductor four 400 in the phase winding is located in the 7 th to 13 th slots in the circumferential direction of the stator core, and the first conductor 200A in the phase winding is also located in the 7 th to 15 th slots in the circumferential direction of the stator core, that is, the conductor four and the first conductor in the phase winding are located in the same magnetic pole of the stator winding; with reference to fig. 15, in the sixth embodiment, the second magnetic poles of the stator winding are located in the 7 th to 15 th slots in the circumferential direction of the stator core, the conductor four 400 in the phase winding is located in the 7 th to 13 th slots in the circumferential direction of the stator core, and the first conductor 200A in the phase winding is also located in the 7 th to 15 th slots in the circumferential direction of the stator core, that is, the conductor four and the first conductor in the phase winding are located in the same magnetic pole of the stator winding; with reference to fig. 17, in the seventh embodiment, the second magnetic pole of the stator winding is located in the 7 th to 15 th slots in the circumferential direction of the stator core, the conductor four 400 in the phase winding is located in the 8 th to 14 th slots in the circumferential direction of the stator core, and the first conductor 200 in the phase winding is also located in the 8 th to 14 th slots in the circumferential direction of the stator core, that is, the conductor four and the first conductor in the phase winding are located in the same magnetic pole of the stator winding; of course, the remaining first conductor 200 and conductor four 400 in each phase winding are correspondingly located in the same pole in the remaining poles of the stator winding in this embodiment.

With reference to fig. 5, 13 and 19, in the first, fifth and eighth embodiments, two slot interiors of the conductor four 400 are located in the 7 th and 13 th slots in the stator core circumferential direction, the pitch of the conductor four 400 is a full pitch 6, two slot interiors of the conductor one 150A are located in the 1 st and 8 th slots in the stator core circumferential direction, the pitch of the conductor one 150A is a long pitch 7, two slot interiors of the conductor two 150B are located in the 2 nd and 7 th slots in the stator core circumferential direction, and the pitch of the conductor two 150B is a short pitch 5, that is, the pitch of the conductor four 400 is different from the pitch 150B of the conductor one 150A and the conductor two. According to the technical scheme, the gap bridge wire is omitted, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the process is simplified, and the processing efficiency is improved.

With reference to fig. 7 and 15, in the second and sixth embodiments, the two slots of the conductor four 400 are located in the 8 th and 14 th slots in the stator core circumferential direction, the pitch of the conductor four 400 is a full pitch 6, the two slots of the conductor one 150A are located in the 1 st and 8 th slots in the stator core circumferential direction, the pitch of the conductor one 150A is a long pitch 7, the two slots of the conductor two 150B are located in the 2 nd and 7 th slots in the stator core circumferential direction, and the pitch of the conductor two 150B is a short pitch 5, that is, the pitch of the conductor four 400 is different from the pitch 150B of the conductor one 150A and the conductor two. According to the technical scheme, the gap bridge wire is omitted, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the process is simplified, and the processing efficiency is improved.

With reference to fig. 9 and 17, in the third and seventh embodiments, the two slots of the conductor four 400 are located in the 8 th and 14 th slots in the circumferential direction of the stator core, the pitch of the conductor four 400 is a full pitch 6, the two slots of the conductor one 150A are located in the 2 nd and 9 th slots in the circumferential direction of the stator core, the pitch of the conductor one 150A is a long pitch 7, the two slots of the conductor two 150B are located in the 3 rd and 8 th slots in the circumferential direction of the stator core, and the pitch of the conductor two 150B is a short pitch 5, that is, the pitch of the conductor four 400 is different from the pitch 150B of the conductor one 150A and the conductor two. According to the technical scheme, the gap bridge wire is omitted, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the process is simplified, and the processing efficiency is improved.

With reference to fig. 11, in the fourth embodiment, two slot interiors of the conductor four 400B are located in the 2 nd slot and the 7 th slot in the stator core circumferential direction, the pitch of the conductor four 400B is a short pitch 5, two slot interiors of the conductor two 150 are located in the 7 th slot and the 13 th slot in the stator core circumferential direction, the pitch of the conductor two 150 is a full pitch 6, that is, the pitch of the conductor four 400B is different from the pitch 150 of the conductor two, and in the fourth embodiment, there is no conductor one in each branch winding of each phase winding of the stator winding, that is, Q is zero. According to the technical scheme, the gap bridge wire is omitted, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the process is simplified, and the processing efficiency is improved.

As shown in fig. 5 to 12, in the first to fourth embodiments, the lead end U1 of the first branch winding of the 4 branch windings of each phase winding is located at the 1 st radial layer of the stator core, the lead end U3 of the branch winding is located at the 2 nd radial layer of the stator core, that is, the lead wires of the first branch winding of the phase winding are located at two radially adjacent layers of the stator core, the lead end U2 of the second branch winding of the 4 branch windings of the phase winding is located at the 1 st radial layer of the stator core, the lead end U4 of the branch winding is located at the 2 nd radial layer of the stator core, that is, the lead wires of the second branch winding of the phase winding are located at two radially adjacent layers of the stator core, the lead end U7 of the third branch winding of the 4 branch windings of the phase winding is located at the 4 th radial layer of the stator core, the lead end U5 of the third branch winding of the 4 branch windings of the phase winding is located at the 3 rd radial layer of the stator core, the outgoing line of the third branch winding of the phase winding is positioned at two layers which are adjacent to the stator core in the radial direction, the lead end U8 of the fourth branch winding in the 4 branch windings of the phase winding is positioned at the 4 th layer which is adjacent to the stator core in the radial direction, the outgoing line end U6 of the fourth branch winding in the 4 branch windings of the phase winding is positioned at the 3 rd layer which is adjacent to the stator core in the radial direction, namely the outgoing line of the fourth branch winding of the phase winding is positioned at two layers which are adjacent to the stator core in the radial direction; as shown in fig. 13 to 18, in the fifth to seventh embodiments, the lead end U1 of the first branch winding of the 4 branch windings of each phase winding is located at the 3 rd radial layer of the stator core, the lead end U3 of the branch winding is located at the 4 th radial layer of the stator core, that is, the lead wires of the first branch winding of the phase winding are located at two adjacent radial layers of the stator core, the lead end U2 of the second branch winding of the 4 branch windings of the phase winding is located at the 3 rd radial layer of the stator core, the lead end U4 of the branch winding is located at the 4 th radial layer of the stator core, that is, the lead wires of the second branch winding of the phase winding are located at two adjacent radial layers of the stator core, the lead end U7 of the third branch winding of the 4 branch windings of the phase winding is located at the 6 th radial layer of the stator core, the lead end U5 of the branch winding is located at the 5 th radial layer of the stator core, that is, that the lead wires of the third branch winding of the phase winding are located, the lead end U8 of the fourth branch winding in the 4 branch windings of the phase winding is located on the 6 th radial layer of the stator core, the lead end U6 of the branch winding is located on the 5 th radial layer of the stator core, namely, the lead wires of the fourth branch winding of the phase winding are located on two adjacent radial layers of the stator core.

With reference to fig. 5 to 10 and 13 to 19, in the first to third embodiments, the fifth to seventh embodiments and the eighth embodiment, the pitch of the conductor four 400 of each branch winding is equal to the pole pitch of the stator winding (the pitch of the conductor four 400 is a full pitch), the pitch of the conductor one 150A is greater than the pole pitch of the stator winding (the pitch of the conductor one 150A is a long pitch), and the pitch of the conductor two 150B is smaller than the pole pitch of the stator winding (the pitch of the conductor two 150B is a short pitch); with reference to fig. 11 and 12, in the fourth embodiment, the pitch of the second conductor 150 of each branch winding is equal to the pole pitch of the stator winding (the pitch of the second conductor 150 is a full pitch), and the pitch of the fourth conductor 400B is smaller than the pole pitch of the stator winding (the pitch of the fourth conductor 400B is a short pitch).

With reference to fig. 1 to 12 and 19, in the first to fifth embodiments and the eighth embodiment of the present invention, when M is equal to 4, each branch winding further includes a third conductor, and two slot interiors of the third conductor are located at the 2 nd layer and the 3 rd layer in the radial direction of the stator core, with reference to fig. 13 to 18, in the sixth to eighth embodiments of the present invention, when M is equal to 8, each branch winding further includes a third conductor, and two slot interiors of the third conductor are located at the 2 nd layer, the 3 rd layer, the 4 th layer, the 5 th layer, the 6 th layer and the 7 th layer in the radial direction of the stator core, that is, N is an odd number greater than or equal to 1;

as shown in fig. 6, 8, 10, 12, 14, 16, 18, and 19, in the first to eighth embodiments, the conductor three 300(300A, 300B) and the first conductor 200(200A) in each branch winding are located in the same magnetic pole of the stator winding, and in the first to eighth embodiments, in combination with fig. 6 and 19, the sixth magnetic pole of the stator winding is located in the 31 st to 38 th slots in the stator core circumferential direction, the conductor three 300B of one branch winding in each phase winding is located in the 32 nd to 37 th slots in the stator core circumferential direction, and the first conductor 200A of the branch winding is also located in the 31 st to 38 th slots in the stator core circumferential direction, that is, the conductor three 300B and the first conductor 200A of the branch winding are located in the same magnetic pole of the stator winding; with reference to fig. 8, in the second embodiment, the sixth magnetic pole of the stator winding is located in the 31 st to 39 th slots in the stator core circumferential direction, the third conductor 300B of one branch winding in each phase winding is located in the 33 rd to 37 th slots in the stator core circumferential direction, and the first conductor 200A of the branch winding is also located in the 31 st to 39 th slots in the stator core circumferential direction, that is, the third conductor 300B of the branch winding and the first conductor 200A are located in the same magnetic pole of the stator winding; with reference to fig. 10, in the third embodiment, the sixth magnetic pole of the stator winding is located in the 31 st to 39 th slots in the stator core circumferential direction, the third conductor 300 of one branch winding in each phase winding is located in the 32 nd to 38 th slots in the stator core circumferential direction, and the first conductor 200 of the branch winding is also located in the 32 nd to 389 th slots in the stator core circumferential direction, that is, the third conductor 300 of the branch winding and the first conductor 200 are located in the same magnetic pole of the stator winding; with reference to fig. 12, in the fourth embodiment, the fourth magnetic pole of the stator winding is located in the 19 th to 26 th slots in the stator core circumferential direction, the third conductor 300A of one branch winding in each phase winding is located in the 19 th to 26 th slots in the stator core circumferential direction, and the first conductor 200A of the branch winding is also located in the 19 th to 26 th slots in the stator core circumferential direction, that is, the third conductor 300A of the branch winding and the first conductor 200A are located in the same magnetic pole of the stator winding; with reference to fig. 14, in the fifth embodiment, the second magnetic poles of the stator windings are located in the 7 th to 14 th slots in the circumferential direction of the stator core, the first conductor three 300A of one branch winding in each phase winding is located in the 7 th to 14 th slots in the circumferential direction of the stator core, the second and third conductors three 300B of the branch winding are located in the 8 th to 13 th slots in the circumferential direction of the stator core, and the first conductor 200A of the branch winding is also located in the 7 th to 14 th slots in the circumferential direction of the stator core, that is, the conductors three 300A, 300B of the branch winding and the first conductor 200A are located in the same magnetic pole of the stator winding; with reference to fig. 16, in the sixth embodiment, the second magnetic poles of the stator windings are located in the 7 th to 15 th slots in the circumferential direction of the stator core, the first conductor three 300 of one branch winding in each phase winding is located in the 8 th to 14 th slots in the circumferential direction of the stator core, the second conductor three 300B of the branch winding is located in the 9 th to 14 th slots in the circumferential direction of the stator core, the second and third conductors three 300B of the branch winding are located in the 8 th to 13 th slots in the circumferential direction of the stator core, and the first conductor 200A of the branch winding is also located in the 7 th to 14 th slots in the circumferential direction of the stator core, that is, the conductors three 300, 300B of the branch winding and the first conductor 200A are located in the same magnetic pole of the stator winding; with reference to fig. 18, in the seventh embodiment, the second magnetic poles of the stator windings are located in the 7 th to 15 th slots in the circumferential direction of the stator core, the first conductor three 300A of one branch winding in each phase winding is located in the 7 th to 15 th slots in the circumferential direction of the stator core, the second conductor three 300B of the branch winding is located in the 9 th to 14 th slots in the circumferential direction of the stator core, the third conductor three 300B of the branch winding is located in the 8 th to 13 th slots in the circumferential direction of the stator core, and the first conductor 200 of the branch winding is also located in the 8 th to 14 th slots in the circumferential direction of the stator core, that is, the conductors three 300A and 300B of the phase winding and the first conductor 200 are located in the same magnetic pole of the stator winding;

referring to FIGS. 6 and 8, in the first and second embodiments, the U1 lead terminal is connected to one of the welding terminals of conductor four 400, conductor four 400 is connected to one of the welding terminals of conductor two 150B, another of the welding terminals of conductor two 150B is connected to one of the welding terminals of first conductor 200A, another of the welding terminals of first conductor 200A is connected to one of the welding terminals of conductor two 150B, another of the welding terminals of conductor two 150B is connected to one of the welding terminals of conductor four 400, another of the welding terminals of conductor four 400 is connected to one of the welding terminals of conductor one 150A, another of the welding terminals of conductor one 150A is connected to one of the welding terminals of conductor three 300B, another of the welding terminals of conductor three 300B is connected to one of the welding terminals of conductor one 150A, another of the welding terminals of conductor one 150A is connected to the wire outlet terminal U3, one of the welding terminals of conductor four 400 of the bypass winding is connected to one of the welding terminals of conductor one 150A, the other welding end of the conductor four 400 is connected with one welding end of the conductor two 150B in an undulating mode, and one welding end of the conductor three 300B of the branch winding is connected with one welding end of the conductor one 150A in a circumferential undulating mode.

Referring to fig. 10, in the third embodiment, U1 lead terminal is connected to one weld terminal of conductor four 400, conductor four 400 is connected to one weld terminal of conductor two 150B, the other weld terminal of conductor two 150B is connected to one weld terminal of first conductor 200, the other weld terminal of first conductor 200 is connected to one weld terminal of conductor two 150B, the other weld terminal of conductor two 150B is connected to one weld terminal of conductor four 400, the other weld terminal of conductor four 400 is connected to one weld terminal of conductor one 150A, the other weld terminal of conductor one 150A is connected to one weld terminal of conductor three 300, the other weld terminal of conductor three 300 is connected to one weld terminal of conductor one 150A, the other weld terminal of conductor one 150A is connected to the U3 outlet terminal, the one weld terminal of conductor four 400 of the bypass winding is connected to one weld terminal of conductor one 150A, the other welding end of the conductor four 400 is connected with one welding end of the conductor two 150B in an undulating mode, and one welding end of the conductor three 300 of the branch winding is connected with one welding end of the conductor one 150A in a circumferential undulating mode.

With reference to fig. 12, in the fourth embodiment, the U1 lead terminal is connected to one of the bonding terminals of conductor two 150, the other of the bonding terminals of conductor two 400B is connected to one of the bonding terminals of conductor two 150, the other of the bonding terminals of conductor two 150 is connected to one of the bonding terminals of first conductor 200A, the other of the bonding terminals of first conductor 200A is connected to one of the bonding terminals of conductor two 150, the other of the bonding terminals of conductor two 150 is connected to one of the bonding terminals of conductor four 400B, the other of the bonding terminals of conductor four 400B is connected to one of the bonding terminals of conductor two 150, the other of the bonding terminals of conductor two 150 is connected to one of the bonding terminals of conductor three 300A, and the other of the bonding terminals of conductor three 300A is connected to the U3 lead terminal; one welding end of the conductor three 300A of the branch winding is connected with one welding end of the conductor two 150 in a wave winding manner, and one welding end of the conductor four 400B of the branch winding is connected with one welding end of the conductor two 150 in a wave winding manner.

Referring to fig. 14, 16 and 18, in the fifth embodiment, the sixth embodiment and the seventh embodiment, the U1 lead terminal is connected to one welding terminal of the third conductor 300B, the other welding terminal of the third conductor 300B is wound around one welding terminal of the first conductor 150A, the other welding terminal of the first conductor 150A is wound around one welding terminal of the fourth conductor 400, the other welding terminal of the fourth conductor 400 is wound around one welding terminal of the second conductor 150B, the other welding terminal of the second conductor 150B is wound around one welding terminal of the first conductor 200A (200), the other welding terminal of the first conductor 200A is wound around one welding terminal of the second conductor 150B, the other welding terminal of the second conductor 150B is wound around one welding terminal of the fourth conductor 400, the other welding terminal of the fourth conductor 400 is wound around one welding terminal of the first conductor 150A, and the other welding terminal of the first conductor 150A is wound around one welding terminal of the third conductor 300B, the other welding end of the conductor three 300B winds around one welding end of the first conductor 150A, the other welding end of the conductor one 150A winds around one welding end of the fourth conductor 400, the other welding end of the conductor four 400 winds around one welding end of the second conductor 150B, the other welding end of the second conductor 150B winds around one welding end of the third conductor 300(300A, 300B), the other welding end of the third conductor 300(300A, 300B) winds around one welding end of the second conductor 150B, the other welding end of the second conductor 150B winds around one welding end of the fourth conductor 400, the other welding end of the fourth conductor 400 winds around one welding end of the first conductor 150A, and the first conductor 150A is connected with the wire outlet U3; that is, one welding end of the conductor three 300(300B) in the branch winding is circumferentially connected with one welding end of the conductor one 200A in an undulating manner, or one welding end of the conductor three 300(300A) in the branch winding is circumferentially connected with one welding end of the conductor two 150B in an undulating manner, one welding end of the conductor four 400 in the branch winding is undulating about one welding end of the conductor one 150A in a connecting manner, and the other welding end of the conductor four 400 is undulating about one welding end of the conductor two 150B in a connecting manner.

In the first to third embodiments and the fifth to seventh embodiments, one welding terminal of the conductor four is connected with one welding terminal of the conductor one in a wave winding manner, and the other welding terminal of the conductor four is connected with one welding terminal of the conductor two in a wave winding manner;

with reference to fig. 5, 6, 7, 8, and 19, in the first, second, and eighth embodiments, each branch winding includes 2 conductor quadrics 400, the pitch of the conductor quadric 400 is full pitch, two conductor quadrics 150A are included, the pitch of the conductor one 150A is long pitch, two conductor quadrics 150B are included, the pitch of the conductor two 150B is short pitch, one first conductor 200A is included, the pitch of the first conductor 200A is long pitch, one conductor three 300B is included, the pitch of the conductor three 300B is short pitch, 2 conductor (the pitch of the conductor quadric 400 is full pitch) pitches equal to the pole pitch, 3 conductors (the pitch of the conductor one 150A is long pitch, and the pitch of the first conductor 200A is long pitch) are included in each branch winding, the pitch is greater than the pole pitch, and 3 conductors (the pitch of the conductor two 150B is short pitch and the pitch of the conductor four is short pitch) are smaller than the pole pitch, that is, the number 2 of conductor pitches equal to the pole pitch in each branch winding is less than the number of conductor pitches greater than the sum 6 of the pole pitch and the conductor pitch smaller than the pole pitch in the branch winding.

With reference to fig. 9 and 10, in the third embodiment, each branch winding includes 2 conductor quadrics 400, the pitch of the conductor quadrics 400 is a full pitch, and includes 1 first conductor 200, the pitch of the first conductor 200 is a full pitch, and includes 1 conductor trigon 300, the pitch of the conductor trigon 300 is a full pitch, and includes two conductor one 150A, the pitch of the conductor one 150A is a long pitch, and includes two conductor two 150B, the pitch of the conductor two 150B is a short pitch, and each branch winding includes 4 conductors (the pitch of the conductor quadric 400 is a full pitch, the pitch of the first conductor 200 is a full pitch, and the pitch of the conductor trigon 300 is a full pitch) which are equal to the pole pitch, and the pitch of the conductor 2 conductors (the pitch of the conductor one 150A is a long pitch) is greater than the pole pitch and the pitch of the conductor 2 conductors (the pitch of the conductor two conductors 150B is a short pitch), and is smaller than the pole pitch, that is 4 conductors in each branch winding equal to the pole pitch in the branch winding which is greater than the pole pitch and the pole pitch in the branch winding and the The pitch is less than the number of the sum of the pole distances of 4.

With reference to fig. 11 and 12, in the fourth embodiment, each branch winding includes 4 conductors two 150, the pitch of the conductors two 150 is a full pitch, the pitch of the conductors four 400B is a short pitch, the pitch of the conductors four 400B is a long pitch, the pitch of the conductors 200A is a long pitch, the pitch of the conductors three 300A is a long pitch, the pitch of the conductors 4 (the pitch of the conductors two 150 is a full pitch) in each branch winding is equal to a pole pitch, the pitch of the conductors 2 (the pitch of the conductors 200A is a long pitch, the pitch of the conductors three 300A is a long pitch) is greater than the pole pitch, and the pitch of the conductors 2 (the pitch of the conductors four 400B is a short pitch) in each branch winding is smaller than the pole pitch, that is, the number 4 of conductor pitches equal to the pole pitch in each branch winding is equal to the number 4 of conductor pitches greater than the sum of the pole pitch and the conductor pitch less than the pole pitch in the branch winding.

With reference to fig. 13 and 14, in the fifth embodiment, each branch winding includes 4 conductor four 400, the pitch of the conductor four 400 is full pitch, the pitch of the conductor one 150A is long pitch, the pitch of the conductor two 150B is short pitch, the pitch of the first conductor 200A is long pitch, the pitch of the first conductor four 200A is long pitch, the pitch of the conductor three 300B is short pitch, the pitch of the conductor three 300A is long pitch, the pitch of the conductor three 300A is 4 conductors (the pitch of the conductor four 400 is full pitch) in each branch winding is equal to the pole pitch, the pitch of the conductor 6 conductors (the pitch of the conductor one 150A is long pitch, the pitch of the conductor three 200A is long pitch, and the pitch of the conductor four is long pitch) in each branch winding is greater than the pole pitch, and the pitch of the conductor 6 conductors (the pitch of the conductor two 150B is short pitch and the pitch of the conductor four is short pitch is less than the pole pitch), that is, the number 4 of conductor pitches equal to the pole pitch in each branch winding is less than the number 12 of conductor pitches greater than the sum of the pole pitch and the conductor pitch smaller than the pole pitch in the branch winding.

With reference to fig. 15 and 16, in the sixth embodiment, each branch winding includes 4 conductor four 400, the pitch of the conductor four 400 is a full pitch, and includes 3 conductor four, wherein the pitch of 2 conductor three 300B is a short pitch and the pitch of 1 conductor three 300 is a full pitch, and includes 4 conductor one 150A, the pitch of conductor one 150A is a long pitch, and includes 4 conductor two 150B, the pitch of conductor two 150B is a short pitch, and includes one first conductor 200A, the pitch of first conductor 200A is a long pitch, and the pitch of each branch winding includes 5 conductors (the pitch of 4 conductor four 400 is a full pitch and the pitch of 1 conductor three 300 is a full pitch) equal to the pole pitch, and the pitch of 5 conductors (the pitch of 4 conductor one 150A is a long pitch and the pitch of 1 first conductor 200A is a long pitch) is greater than the pole pitch and 6 conductors (the pitch of 4 conductor two 150B is a short pitch and the pitch of 2 conductor four is a short pitch) is less than the pole pitch, that is, the number 5 of conductor pitches equal to the pole pitch in each branch winding is less than the number of conductor pitches greater than the sum 11 of the pole pitch and the conductor pitch smaller than the pole pitch in the branch winding.

With reference to fig. 17 and 18, in the seventh embodiment, each branch winding includes 4 conductor quadrics 400, the pitch of the conductor quadrics 400 is full pitch, one first conductor 200 is included, the pitch of the first conductor 200 is full pitch, 4 conductor one 150A is included, the pitch of the conductor one 150A is long pitch, 4 conductor two 150B is included, the pitch of the conductor two 150B is short pitch, and 3 conductor quadrics are included, wherein the pitch of 2 conductor three 300B is short pitch and the pitch of 1 conductor three 300A is long pitch, the pitch of 5 conductors (the pitch of 4 conductor quadric 400 is full pitch and the pitch of 1 first conductor 200 is full pitch) included in each branch winding is equal to the pole pitch, the pitch of 5 conductors (the pitch of 4 conductor one 150A is long pitch and the pitch of 1 first conductor 200A is long pitch) is greater than the pole pitch and the pitch of 6 conductors (the pitch of 4 conductor two 150B is short pitch and the pitch of 2 conductor quadric is short pitch) is smaller than the pole pitch, that is, the number 5 of conductor pitches equal to the pole pitch in each branch winding is less than the number of conductor pitches greater than the sum 11 of the pole pitch and the conductor pitch smaller than the pole pitch in the branch winding.

As shown in fig. 5, 6, and 19, in the first embodiment and the eighth embodiment, the pitch of the first conductor 150A of each branch winding is long pitch 7, the pitch of the second conductor 150B of the branch winding is short pitch 5, the pitch of the fourth conductor 400 of the branch winding is full pitch 6, the pitch of the first conductor 200A of the branch winding is long pitch 7, and the pitch of the third conductor 300B of the branch winding is short pitch 5.

As shown in fig. 7 and 8, in the second embodiment, the pitch of the first conductor 150A of each branch winding is long pitch 7, the pitch of the second conductor 150B of the branch winding is short pitch 5, the pitch of the fourth conductor 400 of the branch winding is full pitch 6, the pitch of the first conductor 200A of the branch winding is long pitch 8, and the pitch of the third conductor 300B of the branch winding is short pitch 4.

As shown in fig. 9 and 10, in the third embodiment, the pitch of the first conductor 150A of each branch winding is long pitch 7, the pitch of the second conductor 150B of the branch winding is short pitch 5, the pitch of the fourth conductor 400 of the branch winding is full pitch 6, the pitch of the first conductor 200 of the branch winding is full pitch 6, and the pitch of the third conductor 300 of the branch winding is full pitch 6.

As shown in fig. 11 and 12, in the fourth embodiment, the pitch of the second conductor 150 of each branch winding is a full pitch, the pitch of the fourth conductor 400B of the branch winding is a short pitch, the pitch of the first conductor 200A of the branch winding is a long pitch 7, and the pitch of the third conductor 300A of the branch winding is a long pitch 7.

As shown in fig. 13 and 14, in the fifth embodiment, the pitch of the first conductor 150A of each branch winding is long pitch 7, the pitch of the second conductor 150B of the branch winding is short pitch 5, the pitch of the first conductor 200A of the branch winding is long pitch 7, the pitch of the fourth conductor 400 of the branch winding is full pitch, in the fifth embodiment, M is equal to 8, the number of the third conductors of the branch winding is 3, the pitch of one third conductor 300A is long pitch 7, and the pitches of the remaining two third conductors 300B are short pitch 5.

As shown in fig. 15 and 16, in the sixth embodiment, the pitch of the first conductor 150A of each branch winding is long pitch 7, the pitch of the second conductor 150B of the branch winding is short pitch 5, the pitch of the first conductor 200A of the branch winding is long pitch 7, the pitch of the fourth conductor 400 of the branch winding is full pitch, in the fifth embodiment, M is equal to 8, the number of the third conductors of the branch winding is 3, the pitch of one third conductor 300 is full pitch 6, and the pitches of the remaining two third conductors 300B are short pitch 5.

As shown in fig. 17 and 18, in the seventh embodiment, the pitch of the first conductor 150A of each branch winding is long pitch 7, the pitch of the second conductor 150B of the branch winding is short pitch 5, the pitch of the first conductor 200 of the branch winding is full pitch 6, the pitch of the fourth conductor 400 of the branch winding is full pitch, in the fifth embodiment, M is equal to 8, the number of the third conductors of the branch winding is 3, the pitch of one third conductor 300A is long pitch 7, and the pitches of the remaining two third conductors 300B are short pitch 5.

With reference to fig. 19, the structure of the eighth embodiment is the same as that of the first embodiment, except that the stator winding of the first embodiment is in 4-branch parallel connection, the stator winding of the eighth embodiment is in 2-branch parallel connection, the eighth embodiment connects the outlet terminal U3 of the first branch winding of the 4 branch windings of the first embodiment in series with the lead terminal U7 of the third branch winding to form the first branch winding of the eighth embodiment, and connects the outlet terminal U4 of the second branch winding of the 4 branch windings of the first embodiment in series with the lead terminal U8 of the fourth branch winding to form the second branch winding of the eighth embodiment; of course, the 4 branch windings of the stator winding in the second to seventh embodiments of the present application may all form the stator winding 2 branch in the eighth embodiment of the present application in parallel, and the present application X is 4.

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 (a bridge wire connection), or may be a communication between two elements. 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:

the method is characterized in that: each phase winding is formed by connecting X branch windings in parallel along the circumferential direction of the stator core through a plurality of conductors;

each branch winding at least comprises a first conductor, the insides of two slots of the first conductor are positioned on a first layer and an Mth layer in the radial direction of the stator core, the insides of two slots of other conductors except the first conductor in the branch winding are positioned on two layers adjacent to the stator core in the radial direction, and M is an even number which is more than or equal to 4;

the other conductors of each branch winding comprise Q first conductors, a plurality of second conductors and a plurality of fourth conductors, the inner parts of two slots of each conductor of the first conductors, the second conductors and the fourth conductors are respectively positioned on the Nth layer and the (N + 1) th layer in the radial direction of the stator core, wherein N is an odd number which is more than or equal to 1, and Q is more than or equal to zero;

the conductor four in each phase winding is positioned in the same magnetic pole of the stator winding as the first conductor, the pitch of the conductor four is different from that of the conductor one, and/or the pitch of the conductor four is different from that of the conductor two.

2. The electric machine stator according to claim 1, wherein the outgoing line of each of the branch windings is located at two radially adjacent layers of the stator core.

3. The stator according to claim 1, wherein the pitch of conductor four of each branch winding is equal to the pole pitch of the stator winding, or the pitch of conductor two of each branch winding is equal to the pole pitch of the stator winding and Q in the branch winding is equal to zero.

4. The stator according to claim 3, wherein when the pitch of the conductor four of each branch winding is equal to the pole pitch of the stator winding, the pitch of the conductor one of the branch winding is greater than the pole pitch of the stator winding, and the pitch of the conductor two of the branch winding is smaller than the pole pitch of the stator winding;

5. The stator according to any one of claims 1 to 4, wherein the remaining conductors of each of the branch windings further include a third conductor, two slot interiors of the third conductor are located at the N +1 th layer and the N +2 th layer of the stator core, and the third conductor and the first conductor are located in the same magnetic pole of the stator winding.

6. The stator according to claim 1, wherein one of the welding ends of the conductor four in each of the branch windings is circumferentially connected to one of the welding ends of the conductor one, and/or one of the welding ends of the conductor four in each of the branch windings is circumferentially connected to one of the welding ends of the conductor two.

7. The stator according to claim 5, wherein one of the welding ends of the conductor three in each of the branch windings is circumferentially connected to one of the welding ends of the conductor one, or one of the welding ends of the conductor three in each of the branch windings is circumferentially connected to one of the welding ends of the conductor two.

8. The stator of claim 5 wherein the number of conductor pitches equal to the pole pitch in each branch winding is equal to or less than the number of conductor pitches greater than the sum of the pole pitch and the conductor pitch less than the pole pitch in that branch winding.

9. The stator according to claim 5, wherein the first conductor of each branch winding has a long pitch, the second conductor of the branch winding has a short pitch, the fourth conductor of the branch winding has a full pitch, the first conductor of the branch winding has a long pitch, and the third conductor of the branch winding has a short pitch.

10. The stator according to claim 5, wherein the first conductor of each branch winding has a long pitch, the second conductor of the branch winding has a short pitch, the fourth conductor of the branch winding has a full pitch, the first conductor of the branch winding has a full pitch, and the third conductor of the branch winding has a full pitch.

11. The stator according to claim 5, wherein the first conductor of each branch winding has a long pitch, the second conductor of the branch winding has a short pitch, the fourth conductor of the branch winding has a full pitch, the first conductor of the branch winding has a long pitch, and the third conductor of the branch winding has a long pitch and a short pitch.

12. The stator according to claim 5, wherein the first conductor of each branch winding has a long pitch, the second conductor of the branch winding has a short pitch, the fourth conductor of the branch winding has a full pitch, the first conductor of the branch winding has a long pitch, and the third conductor of the branch winding has a full pitch and a short pitch.

13. The stator according to claim 5, wherein the first conductor of each branch winding has a long pitch, the second conductor of the branch winding has a short pitch, the fourth conductor of the branch winding has a full pitch, the first conductor of the branch winding has a full pitch, and the third conductor of the branch winding has a long pitch and a short pitch.

14. The stator according to claim 5, wherein the second conductor of each branch winding has a full pitch, the fourth conductor of the branch winding has a short pitch, the first conductor of the branch winding has a long pitch, and the third conductor of the branch winding has a long pitch.

15. The stator according to claim 2, wherein the outlet terminal of the first branch winding of the X branch windings of each phase winding is connected in series with the outlet terminal of the other branch winding of the X/2+1 th branch winding of the phase winding to form X/2 parallel branch windings.

16. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 15.