CN215870942U - Stator and motor - Google Patents

Abstract

The utility model provides a stator and a motor, wherein each phase winding comprises K parallel branch windings, and the K parallel branch windings comprise: the stator core comprises a stator core, a plurality of first connecting parts and a plurality of second connecting parts, wherein the plurality of first connecting parts are positioned at the axial second end of the stator core, each first connecting part is formed by connecting one welding end of one conductor with one welding end of the other conductor, the plurality of connecting parts are provided with a plurality of first connecting parts, and the pitch of the first connecting parts is a whole pitch; the pitch of at least 2 conductors in the third coil unit of the phase winding is equal to or greater than the pitch of the first connection portion of the phase winding or the pitch of at least 2 conductors in the third coil unit of the phase winding is equal to or less than the pitch of the first connection portion of the phase winding. By adopting the structure, the number of the contact of the windings of different phases in the same slot is 2, so that the contact area between two phases in the slot is reduced, the reliability of the windings in the slot is improved, and the service life of the motor is prolonged.

Description

Stator and motor

Technical Field

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

Background

In the prior art, the stator winding is a multi-phase winding, as shown in fig. 19, different-phase windings are arranged between two adjacent conductors in the same slot, and the number of the different-phase windings in the slot is-1, so that the contact area between two phases in the slot is increased, the inter-phase short circuit condition is easy to occur, the reliability of the windings in the slot is reduced, and the service life of the motor is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a stator and a motor, which reduce the contact area between two phases in a slot, thereby improving the reliability of a winding in the slot and prolonging the service life of the motor.

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

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;

the stator winding comprises a plurality of phase windings arranged on a stator core, and the number of slots of each pole and each phase of the stator winding is 3;

the multiple phase windings form M layers in the radial direction of the stator core, wherein M is an integral multiple of more than or equal to 4;

each phase winding includes K parallel branch windings, and K parallel branch windings include:

the coil units are positioned at the first axial end of the stator core, each coil unit comprises 3 conductors, the coil units are provided with K first coil units, K second coil units and a plurality of third coil units, the first coil units are positioned on the first radial layer of the stator core, the second coil units are positioned on the M radial layer of the stator core, the third coil units are positioned on the M/2 radial layer and the M/2+1 radial layer of the stator core, and K is an integer greater than or equal to 1;

the stator core comprises a stator core, a plurality of first connecting parts and a plurality of second connecting parts, wherein the plurality of first connecting parts are positioned at the axial second end of the stator core, each first connecting part is formed by connecting one welding end of one conductor with one welding end of the other conductor, the plurality of connecting parts are provided with a plurality of first connecting parts, and the pitch of the first connecting parts is a whole pitch;

the pitch of at least 2 conductors in the third coil unit of the phase winding is greater than or equal to the pitch of the first connection portion of the phase winding, or the pitch of at least 2 conductors in the third coil unit of the phase winding is less than or equal to the pitch of the first connection portion of the phase winding.

Further, the pitch of 3 conductors in the third coil unit of the phase winding is a long pitch, or the pitch of 3 conductors in the third coil unit of the phase winding is a short pitch.

Further, the pitch of 2 conductors of the 3 conductors in the third coil unit of the phase winding is a long pitch and the pitch of 1 conductor is a short pitch;

or 1 conductor of 3 conductors in the third coil unit of the phase winding is long pitch and 2 conductors are full pitch.

Further, the pitch of 2 conductors of 3 conductors in the third coil unit of the phase winding is a full pitch and the pitch of 1 conductor is a short pitch;

or 1 conductor of 3 conductors in the third coil unit of the phase winding has a long pitch and 2 conductors have a short pitch.

Further, the pitch of 1 conductor in the 3 conductors of the first coil unit is a long pitch and the pitch of 2 conductors is a short pitch, the pitch of 3 conductors of the second coil unit is a full pitch, or the pitch of 2 conductors in the 3 conductors of the first coil unit is a long pitch and the pitch of 1 conductor is a short pitch, the pitch of 3 conductors of the second coil unit is a full pitch, and the third coil unit is located in the same radial direction of the first coil unit and the second coil unit.

Furthermore, the plurality of coil units of each phase winding are also provided with a plurality of fourth coil units, the fourth coil units are positioned on the radial Nth layer and the (N + 1) th layer of the stator core, wherein N is an odd number; the pitch of the 3 conductors of the fourth coil unit is a full pitch, and/or the pitch of 2 of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 1 conductor is a short pitch, and/or the pitch of 1 of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 2 conductors is a short pitch.

Further, when M is greater than 4, the plurality of coil units of each phase winding further have a plurality of fifth coil units, the fifth coil units are located in the same radial direction of the third coil units, the pitch of 3 conductors of the fifth coil units is a full pitch, and/or the pitch of 2 conductors of the 3 conductors of the fifth coil units is a long pitch and the pitch of 1 conductor is a short pitch; and/or the pitch of 1 conductor in the 3 conductors of the fifth coil unit is a long pitch and the pitch of 2 conductors is a short pitch.

Furthermore, the outgoing line of each phase winding is positioned at one end of the second axial connecting part of the stator core; or the leading-out wire of each phase winding is positioned at one end of the first axial connecting part of the stator core.

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

The technical scheme of the utility model is applied, the stator comprises a stator core, wherein the stator core is provided with a plurality of core slots, and the core slots are formed on the radial inner surface of the stator core and are spaced at preset slot intervals along the circumferential direction of the stator core; the stator winding comprises a plurality of phase windings arranged on a stator core, and the number of slots of each pole and each phase of the stator winding is 3; the multiple phase windings form M layers in the radial direction of the stator core, wherein M is an integral multiple of more than or equal to 4; each phase winding includes K parallel branch windings, and K parallel branch windings include: the coil units are positioned at the first axial end of the stator core, each coil unit comprises 3 conductors, the coil units are provided with K first coil units, K second coil units and a plurality of third coil units, the first coil units are positioned on the first radial layer of the stator core, the second coil units are positioned on the M radial layer of the stator core, the third coil units are positioned on the M/2 radial layer and the M/2+1 radial layer of the stator core, and K is an integer greater than or equal to 1; the stator core comprises a stator core, a plurality of first connecting parts and a plurality of second connecting parts, wherein the plurality of first connecting parts are positioned at the axial second end of the stator core, each first connecting part is formed by connecting one welding end of one conductor with one welding end of the other conductor, the plurality of connecting parts are provided with a plurality of first connecting parts, and the pitch of the first connecting parts is a whole pitch; the pitch of at least 2 conductors in the third coil unit of the phase winding is greater than or equal to the pitch of the first connection portion of the phase winding, or the pitch of at least 2 conductors in the third coil unit of the phase winding is less than or equal to the pitch of the first connection portion of the phase winding. By adopting the third coil units positioned on the radial M/2 th layer and the M/2+1 th layer of the stator core and the different pitches of the first connecting parts positioned on the radial M/2 th layer and the M/2+1 th layer of the stator core, the number of the different-phase windings in the same slot is 2, so that the contact area between the two phases in the slot is reduced, the reliability of the windings in the slot is improved, and the service life of the motor is prolonged.

Drawings

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

FIG. 1 is a schematic structural view of a stator in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a structure of one phase winding of the stator winding in an embodiment of the present invention;

FIG. 3 is a schematic plan view of a phase winding in accordance with an embodiment of the present invention;

FIG. 4 is a schematic plane development of a phase winding according to a second embodiment of the present invention;

FIG. 5 is a schematic plane development of a phase winding in a third embodiment of the present invention;

FIG. 6 is a schematic plane development of a phase winding in a fourth embodiment of the present invention;

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

FIG. 8 is a schematic plan view of a phase winding in a sixth embodiment of the present invention;

FIG. 9 is a schematic plane development of a phase winding in a seventh embodiment of the present invention;

fig. 10 is a schematic plan view of a phase winding in an eighth embodiment of the present invention;

fig. 11 is a schematic plan view of a phase winding in accordance with a ninth embodiment of the utility model;

FIG. 12 is a schematic plan view of a phase winding in a tenth embodiment of the utility model;

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

FIG. 14 is a schematic plan view of a phase winding in accordance with a twelfth embodiment of the present invention;

fig. 15 is a schematic plan view of a phase winding in a thirteenth embodiment of the utility model;

fig. 16 is a schematic diagram of a structure of one coil unit of a phase winding in an embodiment of the present invention;

fig. 17 is a schematic diagram of the structure of another coil unit of the phase winding in the embodiment of the utility model;

fig. 18 is a schematic view showing a structure of still another coil unit of a phase winding in the embodiment of the utility model;

FIG. 19 is a prior art phase winding layout for a partial stator winding slot of the present invention;

fig. 20 is a phase conductor pattern in a partial stator winding slot in accordance with an embodiment of the present invention;

FIG. 21 is a schematic view of a first structure of insulation paper in a stator slot according to an embodiment of the present invention;

FIG. 22 is a schematic view of a second structure of insulation paper in a stator slot according to an embodiment of the present invention;

FIG. 23 is a schematic view of a third embodiment of the present invention showing the structure of the insulation paper in the slots of the stator;

Detailed Description

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

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.

The utility model provides a stator. In the application, the pitch is the interval between the two groove interiors of the same U conductor along the circumferential direction, or the pitch is the sum of the span between the groove interiors corresponding to one welding end of one U conductor and the span between the groove interiors corresponding to one welding end of the other U conductor; it should be noted that, in this application, the first radial layer of the stator core is the first layer close to one side of the central axis direction of the stator core, and may also be the first layer away from one side of the central axis direction of the stator core.

Exemplarily, as shown in fig. 1, a stator is provided in an embodiment, and includes a stator core 20, the stator core 20 having a plurality of core slots 21, the plurality of core slots 21 being formed on a radially inner surface of the stator core 20 and being spaced apart at a predetermined slot pitch in a circumferential direction of the stator core 20.

Illustratively, as shown in fig. 1 to 18, the stator winding 10 includes a plurality of phase windings mounted on the stator core 20, the number of slots per pole per phase of the stator winding is 3, the plurality of phase windings form 4 layers or 8 layers in the radial direction of the stator core 20, and M is an integer multiple of 4 or more.

Referring to fig. 1 to 18, a stator winding 10 including a plurality of phase windings mounted on a stator core 20 so as to be different from each other in electrical phase and form M layers in a radial direction of the stator core 20, referring to fig. 1 to 12, in an embodiment one to ten, the phase windings (U-phase winding or V-phase winding or W-phase winding) form 4 layers or 8 layers in the radial direction of the stator core; 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 3; each magnetic pole of the rotor provided with 9 slots 21, the rotor having six magnetic poles and being such that the number of slots 21 provided in the stator core 20 is equal to 54 (i.e., 3X6X3) for each phase of the three-phase stator winding 10, in embodiments eleventh to twelfth, in conjunction with fig. 13 to 14, the phase winding (U-phase winding or V-phase winding or W-phase winding) forms 8 layers in the stator core radial direction; 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 3; each pole of the rotor is provided with 9 slots 21, 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 108 (i.e., 3X12X3), and further, in the present embodiment, the stator core 20 defines one tooth 22 by two adjacent slots 21, and the stator core 20 is formed by laminating a plurality of annular magnetic steel plates at both end surfaces in the axial direction of the stator core, and other conventional metal plates may be used instead of the magnetic steel plates. Fig. 21 shows that the first type of in-slot insulating paper 30 in this embodiment is B-shaped insulating paper, fig. 22 shows that the second type of in-slot insulating paper 30 in this embodiment is double-mouth insulating paper, fig. 23 shows that the third type of in-slot insulating paper 30 in this embodiment is S-shaped insulating paper, and in this embodiment, any one of the three types of in-slot insulating paper may be selected to isolate the inter-phase conductors in the slots 21.

Illustratively, as shown in fig. 3 to 12, in the first to tenth embodiments, each phase winding includes 2 parallel branch windings, and the 2 parallel branch windings include: a plurality of coil units located at the first axial end 26 of the stator core, each coil unit includes 3 conductors, the 3 conductors of each coil unit are located in 3 circumferentially adjacent slots of the stator core, the plurality of coil units include 2 first coil units 100, 2 second coil units 200 and 4 third coil units 300, the first coil unit 100 is located at the first radial layer of the stator core, the second coil unit 200 is located at the 4 th radial layer of the stator core, the third coil units 300 are located at the 2 nd and 3 rd radial layers of the stator core, in this embodiment, K is 2, and M is 4; as shown in fig. 13, in the eleventh embodiment, each phase winding includes 3 parallel branch windings, and the 3 parallel branch windings include: the plurality of coil units are positioned at the first axial end 26 of the stator core, each coil unit comprises 3 first coil units 100, 3 second coil units 200 and a plurality of third coil units 300, the first coil unit 100 is positioned at the first radial layer of the stator core, the second coil unit 200 is positioned at the 8 th radial layer of the stator core, the third coil units 300 are positioned at the 4 th and 5 th radial layers of the stator core, and K is 3 and M is 8 in the embodiment; as shown in fig. 14, in the twelfth embodiment, each phase winding includes 4 parallel-branch windings, and the 4 parallel-branch windings include: the plurality of coil units are positioned at the first axial end 26 of the stator core, each coil unit comprises 4 first coil units 100, 4 second coil units 200 and a plurality of third coil units 300, the first coil units 100 are positioned at the first radial layer of the stator core, the second coil units 200 are positioned at the 8 th radial layer of the stator core, the third coil units 300 are positioned at the 4 th and 5 th radial layers of the stator core, and K is 4 and M is 8 in the embodiment; as shown in fig. 15, in the thirteenth embodiment, each phase winding includes 1 parallel-branch winding (i.e., series-branch winding), and the 1 parallel-branch winding (series-branch winding) includes: the plurality of coil units are positioned at the first axial end 26 of the stator core, each coil unit comprises 1 first coil unit 100, 1 second coil unit 200 and a plurality of third coil units 300, the first coil unit 100 is positioned at the first radial layer of the stator core, the second coil unit 200 is positioned at the 4 th radial layer of the stator core, the third coil units 300 are positioned at the 4 th and 5 th radial layers of the stator core, and in the embodiment, K is 1, and M is 4; correspondingly, when K equals 6, every phase winding includes 6 parallel branch winding, and a plurality of coil unit that corresponds have 6 first coil unit 100 and 6 second coil unit 200, therefore, in this application, can change series connection branch winding and parallel branch winding in the phase winding through the number of adjustment first coil unit and second coil unit, need not to increase more hairpin kinds and can realize.

When M is equal to 4, 34 first connecting parts are positioned at the axial second end 25 of the stator core, each first connecting part is formed by connecting one welding end 303 of one conductor with one welding end 303 of another conductor, and 17 first connecting parts 1000 are positioned at the 1 st layer and the 2 nd layer in the radial direction of the stator core; another 17 first connecting portions 1000 are located on the layer other than the 3 rd layer and the 4 th layer; the first connecting part 1000 is connected with a welding end corresponding to the inside of a slot positioned in a 2 nd slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a 11 th slot of a radial 3 rd layer of the stator core, the second first connecting part 1000 is connected with a welding end corresponding to the inside of a slot positioned in a 3 rd slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a 12 th slot of a radial 3 rd layer of the stator core, the third first connecting part 1000 is connected with a welding end corresponding to the inside of a slot positioned in a 4 th slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a 13 th slot of a radial 3 rd layer of the stator core, the fourth first connecting part 1000 is connected with a welding end corresponding to the inside of a slot positioned in a 12 th slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a radial 3 rd layer of the stator core, the fifth first connecting part 1000 connects a welding end corresponding to the inside of a slot positioned in a 13 th slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a 22 nd slot of a radial 3 rd layer of the stator core, the sixth first connecting part 1000 connects a welding end corresponding to the inside of a slot positioned in a 20 th slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a 29 th slot of a radial 3 rd layer of the stator core, the seventh first connecting part 1000 connects a welding end corresponding to the inside of a slot positioned in a 21 st slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a 30 th slot of a radial 3 rd layer of the stator core, the eighth first connecting part 1000 connects a welding end corresponding to the inside of a slot positioned in a 22 nd slot of a radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot positioned in a 31 rd slot of a radial 3 rd layer of the stator core, the ninth first connecting part 1000 connects a welding end corresponding to the inside of a slot located in the 29 th slot of the radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 3 rd layer of the stator core, the tenth first connecting part 1000 connects a welding end corresponding to the inside of a slot located in the 30 th slot of the radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot located in the 39 th slot of the radial 3 rd layer of the stator core, the eleventh first connecting part 1000 connects a welding end corresponding to the inside of a slot located in the 31 st slot of the radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot located in the 40 th slot of the radial 3 rd layer of the stator core, the twelfth first connecting part 1000 connects a welding end corresponding to the inside of a slot located in the 38 th slot of the radial 4 th layer of the stator core and a welding end corresponding to the inside of a slot located in the radial 47 th slot of the radial 3 rd layer of the stator core, the thirteenth first connecting portion 1000 connects the welding end corresponding to the inside of the slot located in the 39 th slot of the radial 4 th layer of the stator core and the welding end corresponding to the inside of the slot located in the 48 th slot of the radial 3 rd layer of the stator core, the fourteenth first connecting portion 1000 connects the welding end corresponding to the inside of the slot located in the 40 th slot of the radial 4 th layer of the stator core and the welding end corresponding to the inside of the slot located in the 49 th slot of the radial 3 rd layer of the stator core, the fifteenth first connecting portion 1000 connects the welding end corresponding to the inside of the slot located in the 47 th slot of the radial 4 th layer of the stator core and the welding end corresponding to the inside of the slot located in the 2 nd slot of the radial 3 rd layer of the stator core, the sixteenth first connecting portion 1000 connects the welding end corresponding to the inside of the slot located in the 48 th slot of the radial 4 th layer of the stator core and the welding end corresponding to the inside of the slot located in the 3 rd slot of the radial 3 rd layer of the stator core, the seventeenth first connecting part 1000 connects the welding end corresponding to the inside of the slot in the 49 th slot of the radial 4 th layer of the stator core with the welding end corresponding to the inside of the slot in the 4 th slot of the radial 3 rd layer of the stator core; the pitches of the other 17 first connecting portions 1000 of the phase winding, which are located on the radial 3 rd layer and the radial 4 th layer of the stator core, are the same as the pitches of the 17 first connecting portions 1000 located on the radial 1 st layer and the radial 2 nd layer of the stator core, and the differences are only different in the groove interior corresponding to the welding end connected with the first connecting portions, which is not further described herein, that is, the pitch of the second connecting portion 1000 in the phase winding is the whole pitch 9; the pitch of at least 2 of the 3 conductors of the third coil unit 300 of each phase winding is equal to or greater than the pitch of the first connection 1000 of the phase winding, or the pitch of at least 2 of the 3 conductors of the third coil unit 300 of each phase winding is equal to or less than the pitch of the first connection 1000 of the phase winding. By adopting the third coil units positioned on the radial M/2 th layer and the M/2+1 th layer of the stator core and the different pitches of the first connecting parts positioned on the radial M/2 th layer and the M/2+1 th layer of the stator core, and combining the graph 20, the number of the contact phases of the windings in different phases in the same slot is 2, so that the contact area between the two phases in the slot is reduced, the reliability of the windings in the slot is improved, and the service life of the motor is prolonged.

Exemplarily, as shown in fig. 3, 9, 10, 11, 13, and 14, in the first embodiment, the seventh embodiment to the ninth embodiment, and the eleventh embodiment to the twelfth embodiment, the pitch of the three conductors in the third coil unit 300 of each phase winding is a short pitch.

With reference to fig. 3, 9, 10, 11, 13, and 14, in the first embodiment, seventh embodiment to ninth embodiment, and eleventh embodiment to twelfth embodiment, specifically, each phase winding includes 4 third coil units 300, a first conductor of the first third coil unit 300 is located in the 3 rd layer 2 th slot and the 2 nd layer 10 th slot in the radial direction of the stator core, a second conductor of the first third coil unit 300 is located in the 3 rd layer 3 rd slot and the 2 nd layer 11 th slot in the radial direction of the stator core, a third conductor of the first third coil unit 300 is located in the 3 rd layer 4 th slot and the 2 nd layer 12 th slot in the radial direction of the stator core, a first conductor of the second third coil unit 300 is located in the 3 rd layer 11 th slot and the 2 nd layer 19 slot in the radial direction of the stator core, a second conductor of the second coil unit 300 is located in the 3 rd layer 12 th slot and the 2 nd layer 20 th slot in the radial direction of the stator core, the third conductors of the second third coil unit 300 are located in the radial 13 rd layer slot and the 21 nd layer slot of the stator core, the first conductors of the third coil unit 300 are located in the radial 3 rd layer slot and the radial 29 th layer slot and the radial 37 nd layer slot of the stator core, the second conductors of the third coil unit 300 are located in the radial 3 rd layer slot and the radial 38 nd layer slot of the stator core, the third conductors of the third coil unit 300 are located in the radial 3 rd layer slot and the radial 2 nd layer slot of the stator core, the first conductors of the fourth third coil unit 300 are located in the radial 3 rd layer slot and the radial 2 nd layer slot of the stator core, the second conductors of the fourth coil unit 300 are located in the radial 3 rd layer slot and the radial 3 rd layer slot, the radial 2 nd layer slot of the stator core, the third conductors of the fourth coil unit 300 are located in the radial 40 rd layer slot and the radial 3 rd layer slot of the stator core, The pitch of the three conductors in the layer 2 48 slot, i.e., the third coil unit 300 of each phase winding, is a short pitch of 8;

exemplarily, as shown in fig. 4, in embodiment two, the pitch of the three conductors in the third coil unit 300 of each phase winding is a long pitch;

referring to fig. 4, in the second embodiment, specifically, each phase winding includes 4 third coil units 300, a first conductor of the first third coil unit 300 is located at the radial 3 rd layer 1 st slot and the 2 nd layer 11 nd slot of the stator core, a second conductor of the first third coil unit 300 is located at the radial 3 rd layer 2 nd slot and the 2 nd layer 12 nd slot of the stator core, a third conductor of the first third coil unit 300 is located at the radial 3 rd layer 3 rd slot and the 2 nd layer 13 nd slot of the stator core, a first conductor of the second third coil unit 300 is located at the radial 3 rd layer 10 th slot and the 2 nd layer 20 th slot of the stator core, a second conductor of the second third coil unit 300 is located at the radial 3 rd layer 11 th slot and the 2 nd layer 21 st slot of the stator core, a third conductor of the second third coil unit 300 is located at the radial 3 rd layer 12 th slot and the 2 nd layer 22 nd slot of the stator core, the first conductors of the third coil unit 300 are located in the radial 28 th and 38 nd slots at the 3 rd layer and the 38 nd slot at the 2 nd layer of the stator core, the second conductors of the third coil unit 300 are located in the radial 29 th and 39 nd slots at the 3 rd layer and the 2 nd layer of the stator core, the third conductors of the third coil unit 300 are located in the radial 30 th and 40 th slots at the 3 rd layer and the 2 nd layer of the stator core, the first conductors of the fourth coil unit 300 are located in the radial 37 th and 47 nd slots at the 3 rd layer and the 2 nd layer of the stator core, the second conductors of the fourth coil unit 300 are located in the radial 38 th and 48 th slots at the 3 rd layer and the 2 nd layer of the stator core, the third conductors of the fourth coil unit 300 are located in the radial 39 th and 49 nd layer of the stator core, i.e. the pitch of the three conductors in the third coil unit 300 of each phase winding is a long pitch 10.

Exemplarily, as shown in fig. 5, in embodiment three, the pitch of two conductors of the three conductors in the third coil unit 300 of each phase winding is a full pitch and the pitch of one conductor is a short pitch;

referring to fig. 5, in the third embodiment, specifically, each phase winding includes 4 third coil units 300, a first conductor of the first third coil unit 300 is located at the radial 3 rd layer 2 nd slot and the 2 nd layer 11 nd slot of the stator core, a second conductor of the first third coil unit 300 is located at the radial 3 rd layer 3 rd slot and the 2 nd layer 12 nd slot of the stator core, a third conductor of the first third coil unit 300 is located at the radial 3 rd layer 4 th slot and the 2 nd layer 10 th slot of the stator core, a first conductor of the second third coil unit 300 is located at the radial 3 rd layer 11 th slot and the 2 nd layer 20 th slot of the stator core, a second conductor of the second third coil unit 300 is located at the radial 3 rd layer 12 th slot and the 2 nd layer 21 th slot of the stator core, a third conductor of the second third coil unit 300 is located at the radial 3 rd layer 13 th slot and the 2 nd layer 19 th slot of the stator core, the first conductor of the third coil unit 300 is located at the radial 3 rd layer 29 th slot and the 2 nd layer 38 th slot of the stator core, the second conductor of the third coil unit 300 is located at the radial 3 rd layer 30 th slot and the 2 nd layer 39 th slot of the stator core, the third conductor of the third coil unit 300 is located at the radial 3 rd layer 31 th slot and the 2 nd layer 37 th slot of the stator core, the first conductor of the fourth coil unit 300 is located at the radial 3 rd layer 38 th slot and the 2 nd layer 47 th slot of the stator core, the second conductor of the fourth coil unit 300 is located at the radial 3 rd layer 39 th slot and the 2 nd layer 48 th slot of the stator core, the third conductor of the fourth coil unit 300 is located at the radial 3 rd layer 40 th slot and the 2 nd layer 46 slot of the stator core, that is, the pitch of the first conductor and the second conductor in the third coil unit 300 of each phase winding is the whole 9, the pitch of the third conductor of the three conductors in the third coil unit 300 is a short pitch 6;

alternatively, referring to fig. 18, in the third embodiment, the third coil unit 300 may also be configured such that the pitch of one conductor of the three conductors in the third coil unit 300 of each phase winding is a long pitch and the pitch of two conductors is a short pitch;

specifically, each phase winding includes 4 third coil units 300, the first conductor of the first third coil unit 300 is located in the radial 3 rd layer, 2 nd layer, 12 nd slot of the stator core, the second conductor of the first third coil unit 300 is located in the radial 3 rd layer, 3 nd slot, 2 nd layer, 10 th slot of the stator core, the third conductor of the first third coil unit 300 is located in the radial 3 rd layer, 4 th slot, 2 nd layer, 11 th slot of the stator core, the first conductor of the second third coil unit 300 is located in the radial 3 rd layer, 11 th slot, 2 nd layer, 21 st slot of the stator core, the second conductor of the second third coil unit 300 is located in the radial 3 rd layer, 12 th slot, 2 nd layer, 19 th slot of the stator core, the third conductor of the second third coil unit 300 is located in the radial 3 rd layer, 13 nd slot, 2 nd layer, 20 th slot of the stator core, the first conductor of the third coil unit 300 is located in the radial 3 rd layer, 29 th slot of the stator core, A 39 th slot on the layer 2, a second conductor of the third coil unit 300 is positioned at the 30 th slot on the layer 3 and a 37 th slot on the layer 2 in the radial direction of the stator core, a third conductor of the third coil unit 300 is positioned at the 31 st slot on the layer 3 and a 38 th slot on the layer 2 in the radial direction of the stator core, a first conductor of the fourth coil unit 300 is positioned at the 38 th slot on the layer 3 and a 48 th slot on the layer 2 in the radial direction of the stator core, a second conductor of the fourth coil unit 300 is positioned at the 39 th slot on the layer 3 and a 46 th slot on the layer 2 in the radial direction of the stator core, a third conductor of the fourth coil unit 300 is positioned at the 40 th slot on the layer 3 and a 47 th slot on the layer 2 in the radial direction of the stator core, i.e. the pitch of the first of the three conductors in the third coil unit 300 of each phase winding is a long pitch of 10, the pitch of the second and third of the three conductors in the third coil unit 300 is a short pitch 7;

exemplarily, as shown in fig. 6, in the fourth embodiment, the pitch of two conductors of the three conductors in the third coil unit 300 of each phase winding is a long pitch and the pitch of one conductor is a short pitch.

Referring to fig. 6, in the fourth embodiment, specifically, each phase winding includes 4 third coil units 300, a first conductor of the first third coil unit 300 is located at the radial 3 rd layer 1 st slot and the 2 nd layer 12 nd slot of the stator core, a second conductor of the first third coil unit 300 is located at the radial 3 rd layer 2 nd slot and the 2 nd layer 13 th slot of the stator core, a third conductor of the first third coil unit 300 is located at the radial 3 rd layer 3 rd slot and the 2 nd layer 11 th slot of the stator core, a first conductor of the second third coil unit 300 is located at the radial 3 rd layer 10 th slot and the 2 nd layer 21 th slot of the stator core, a second conductor of the second third coil unit 300 is located at the radial 3 rd layer 11 th slot and the 2 nd layer 22 nd slot of the stator core, a third conductor of the second third coil unit 300 is located at the radial 3 rd layer 12 th slot and the 2 nd layer 20 th slot of the stator core, the first conductor of the third coil unit 300 is located at the 28 rd slot and the 39 th slot of the layer 3 in the radial direction of the stator core, the second conductor of the third coil unit 300 is located at the 29 th slot and the 40 th slot of the layer 2 in the radial direction of the stator core, the third conductor of the third coil unit 300 is located at the 30 th slot and the 38 th slot of the layer 2 in the radial direction of the stator core, the first conductor of the fourth coil unit 300 is located at the 37 th slot and the 48 th slot of the layer 3 in the radial direction of the stator core, the second conductor of the fourth coil unit 300 is located at the 38 th slot and the 49 th slot of the layer 2 in the radial direction of the stator core, the third conductor of the fourth coil unit 300 is located at the 39 th slot and the 47 th slot of the layer 3 in the radial direction of the stator core, namely, the pitch of the first conductor and the second conductor of the three conductors in the third coil unit 300 of each phase winding is long 11, the pitch of the third conductor of the three conductors in the third coil unit 300 is a short pitch 8;

alternatively, referring to fig. 18, in the fourth embodiment, the third coil unit 300 may also be configured such that the pitch of one conductor of the three conductors in the third coil unit 300 of each phase winding is a long pitch and the pitch of two conductors is a full pitch;

specifically, each phase winding includes 4 third coil units 300, the first conductor of the first third coil unit 300 is located in the radial 3 rd layer 1 st slot and the 2 nd layer 13 th slot of the stator core, the second conductor of the first third coil unit 300 is located in the radial 3 rd layer 2 nd slot and the 2 nd layer 11 th slot of the stator core, the third conductor of the first third coil unit 300 is located in the radial 3 rd layer 3 rd slot and the 2 nd layer 12 nd slot of the stator core, the first conductor of the second third coil unit 300 is located in the radial 3 rd layer 10 th slot and the 2 nd layer 22 nd slot of the stator core, the second conductor of the second third coil unit 300 is located in the radial 3 rd layer 11 th slot and the 2 nd layer 20 th slot of the stator core, the third conductor of the second third coil unit 300 is located in the radial 3 rd layer 12 th slot and the 2 nd layer 21 st slot of the stator core, the first conductor of the third coil unit 300 is located in the radial 3 rd layer 28 th slot of the stator core, The 40 th slot on the layer 2, the second conductor of the third coil unit 300 is positioned at the 29 th slot on the layer 3 and the 38 th slot on the layer 2 in the radial direction of the stator core, the third conductor of the third coil unit 300 is positioned at the 30 th slot on the layer 3 and the 39 th slot on the layer 2 in the radial direction of the stator core, the first conductor of the fourth coil unit 300 is positioned at the 37 th slot on the layer 3 and the 49 th slot on the layer 2 in the radial direction of the stator core, the second conductor of the fourth coil unit 300 is positioned at the 38 th slot on the layer 3 and the 47 th slot on the layer 2 in the radial direction of the stator core, the third conductor of the fourth coil unit 300 is positioned at the 39 th slot on the layer 3 and the 48 th slot on the layer 2 in the radial direction of the stator core, i.e. the pitch of the first of the three conductors in the third coil unit 300 of each phase winding is the long pitch 12, the pitch of the second and third of the three conductors in the third coil unit 300 is the full pitch 9;

exemplarily, as shown in fig. 1 to 17, in the first to tenth embodiments, the pitch of two conductors of the 3 conductors of the first coil unit 100 is a long pitch and the pitch of one conductor is a short pitch, and the pitch of the 3 conductors of the second coil unit 200 is a full pitch.

In embodiments one to twelve, specifically, with reference to fig. 4, the phase winding includes 2 first coil units 100, the first conductor of the first coil unit 100 is located in the 2 nd and 12 th slots of the 1 st layer of the stator core, the second conductor of the first coil unit 100 is located in the 3 rd and 13 th slots of the 1 st layer of the stator core, the third conductor of the first coil unit 100 is located in the 4 th and 11 th slots of the 1 st layer of the stator core, the first conductor of the second first coil unit 100 is located in the 29 th and 39 th slots of the 1 st layer of the stator core, the second conductor of the second first coil unit 100 is located in the 30 th and 40 th slots of the 1 st layer of the stator core, the third conductor of the second first coil unit 100 is located in the 31 th and 38 th slots of the 1 st layer of the stator core, that is, the long pitch 10 of two conductors of the 3 conductors of the first coil unit 100, the pitch of one conductor of the 3 conductors of the first coil unit 100 is a short pitch 7; the phase winding comprises 2 second coil units 200, wherein a first conductor of the first second coil unit 200 is positioned in the 10 th slot and the 19 th slot of the 1 st layer of the stator core, a second conductor of the first second coil unit 200 is positioned in the 11 th slot and the 20 th slot of the 1 st layer of the stator core, a third conductor of the first second coil unit 200 is positioned in the 12 th slot and the 21 st slot of the 1 st layer of the stator core, a first conductor of the second coil unit 200 is positioned in the 37 th slot and the 46 th slot of the 1 st layer of the stator core, a second conductor of the second coil unit 200 is positioned in the 38 th slot and the 47 th slot of the 1 st layer of the stator core, and a third conductor of the second coil unit 200 is positioned in the 39 th slot and the 48 th slot of the 1 st layer of the stator core, namely, the pitch of the 3 conductors of the second coil unit 200 is the whole pitch 9; the phase winding comprises 4 third coil units, the first third coil unit is positioned on the radial 2 nd layer, 1 st slot, 2 nd slot, 3 rd slot, 11 th slot, 12 th slot and 13 th slot of the 3 rd layer of the stator core, the first coil unit of the phase winding is positioned on the radial 2 nd slot, 3 rd slot, 4 th slot, 11 th slot, 12 th slot and 13 th slot of the 1 st layer of the stator core, the third coil unit 300 and the first coil unit 100 are arranged along the same radial direction of the 11 th slot, the 12 th slot and the 13 th slot of the stator core, namely the third coil unit is positioned on the same radial direction of the first coil unit; the second third coil unit is located in the radial 2 nd layer and 3 rd layer 10 th, 11 th, 12 th and 20 th, 21 st and 22 nd slots of the stator core, the first second coil unit of the phase winding is located in the radial 4 th layer 10 th, 11 th, 12 th and 19 th, 20 th and 21 st slots of the stator core, the third coil unit 300 and the first coil unit 100 are arranged along the same radial direction of the 10 th, 11 th and 12 th slots of the stator core, namely the third coil unit is located in the same radial direction of the second coil unit; the third coil unit is located in the radial 28 th, 29 th, 30 th and 38 th slots, 39 th and 40 th slots of the 2 nd and 3 rd layers of the stator core, the second first coil unit of the phase winding is located in the radial 29 th, 30 th, 31 th and 38 th slots, 39 th and 40 th slots of the 1 st layer of the stator core, the third coil unit 300 and the first coil unit 100 are arranged along the same radial direction of the 38 th, 39 th and 40 th slots of the stator core, namely the third coil unit is located in the same radial direction of the first coil unit; the fourth third coil unit is located in the radial 37 th, 38 th, 39 th and 47 th slots, 48 th and 49 th slots of the 2 nd and 3 rd layers of the stator core, the second coil unit of the phase winding is located in the radial 37 th, 38 th, 39 th and 46 th slots, 47 th and 48 th slots of the 4 th layer of the stator core, the third coil unit 300 and the first coil unit 100 are arranged along the same radial direction of the 37 th, 38 th and 39 th slots of the stator core, namely the third coil unit is located in the same radial direction of the second coil unit.

Alternatively, the pitch of one conductor of the 3 conductors of the first coil unit 100 is a long pitch and the pitch of two conductors is a short pitch, and the pitch of the 3 conductors of the second coil unit 200 is a full pitch.

The phase winding comprises 2 first coil units 100, wherein first conductors of the first coil units 100 are positioned in a 2 nd slot and a 13 th slot of a 1 st layer of a stator core, second conductors of the first coil units 100 are positioned in a 3 rd slot and a 11 th slot of the 1 st layer of the stator core, third conductors of the first coil units 100 are positioned in a 4 th slot and a 12 th slot of the 1 st layer of the stator core, first conductors of the second first coil units 100 are positioned in a 29 th slot and a 40 th slot of the 1 st layer of the stator core, second conductors of the second first coil units 100 are positioned in a 30 th slot and a 38 th slot of the 1 st layer of the stator core, third conductors of the second first coil units 100 are positioned in a 31 th slot and a 39 th slot of the 1 st layer of the stator core, namely, the pitch of one conductor of the 3 conductors of the first coil unit 100 is long pitch 11, and the pitch of one conductor of the 3 conductors of the first coil unit 100 is short pitch 8; the phase winding comprises 2 second coil units 200, wherein a first conductor of the first second coil unit 200 is positioned in the 10 th slot and the 19 th slot of the 1 st layer of the stator core, a second conductor of the first second coil unit 200 is positioned in the 11 th slot and the 20 th slot of the 1 st layer of the stator core, a third conductor of the first second coil unit 200 is positioned in the 12 th slot and the 21 st slot of the 1 st layer of the stator core, a first conductor of the second coil unit 200 is positioned in the 37 th slot and the 46 th slot of the 1 st layer of the stator core, a second conductor of the second coil unit 200 is positioned in the 38 th slot and the 47 th slot of the 1 st layer of the stator core, and a third conductor of the second coil unit 200 is positioned in the 39 th slot and the 48 th slot of the 1 st layer of the stator core, namely, the pitch of the 3 conductors of the second coil unit 200 is the whole pitch 9; the phase winding comprises 4 third coil units, the first third coil unit is positioned on the radial 2 nd layer, 1 st slot, 2 nd slot, 3 rd slot, 11 th slot, 12 th slot and 13 th slot of the 3 rd layer of the stator core, the first coil unit of the phase winding is positioned on the radial 2 nd slot, 3 rd slot, 4 th slot, 11 th slot, 12 th slot and 13 th slot of the 1 st layer of the stator core, the third coil unit 300 and the first coil unit 100 are arranged along the same radial direction of the 11 th slot, the 12 th slot and the 13 th slot of the stator core, namely the third coil unit is positioned on the same radial direction of the first coil unit; the second third coil unit is located in the radial 10 th, 11 th, 12 th and 20 th, 21 st and 22 nd slots of the 2 nd and 3 rd layers of the stator core, the first second coil unit of the phase winding is located in the radial 10 th, 11 th, 12 th and 19 th, 20 th and 21 st slots of the 4 th layer of the stator core, the third coil unit 300 and the second coil unit 200 are arranged along the same radial direction of the 10 th, 11 th and 12 th slots of the stator core, namely the third coil unit is located in the same radial direction of the second coil unit; the third coil unit is located in the radial 28 th, 29 th, 30 th and 38 th slots, 39 th and 40 th slots of the 2 nd and 3 rd layers of the stator core, the second first coil unit of the phase winding is located in the radial 29 th, 30 th, 31 th and 38 th slots, 39 th and 40 th slots of the 1 st layer of the stator core, the third coil unit 300 and the first coil unit 100 are arranged along the same radial direction of the 38 th, 39 th and 40 th slots of the stator core, namely the third coil unit is located in the same radial direction of the first coil unit; the fourth third coil unit is located in the radial 37 th, 38 th, 39 th and 47 th slots, 48 th and 49 th slots of the 2 nd and 3 rd layers of the stator core, the second coil unit of the phase winding is located in the radial 37 th, 38 th, 39 th and 47 th slots, 48 th and 49 th slots of the 4 th layer of the stator core, the third coil unit 300 and the second coil unit 200 are arranged along the same radial direction of the 37 th, 38 th and 39 th slots of the stator core, namely the third coil unit is located in the same radial direction of the second coil unit.

For example, as shown in fig. 1 to 12, in the embodiment, the plurality of coil units of each phase winding further have a plurality of fourth coil units, the fourth coil units are located at the 1 st and 2 nd, 3 rd and 4 th layers in the radial direction of the stator core, where N is 1, 3; the pitch of the 3 conductors of the fourth coil unit is a full pitch, and/or the pitch of 2 of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 1 conductor is a short pitch, and/or the pitch of 1 of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 2 conductors is a short pitch.

In conjunction with fig. 1-12, in an embodiment, the plurality of coil units of each phase winding further has 4 fourth coil units, 2 fourth coil units in the 4 fourth coil units of the phase winding are positioned on the 1 st layer and the 2 nd layer in the radial direction of the stator core, 2 fourth coil units in 4 fourth coil units of the phase winding are located on the radial 3 rd layer and the 4 th layer of the stator core, the pitch of 3 conductors of the fourth coil units is a full pitch, specifically, the first conductor of the fourth coil unit is located in the 20 th slot of the radial 3 rd layer of the stator core and the 29 th slot of the 4 th layer, the second conductor of the fourth coil unit is located in the 21 st slot of the radial 3 rd layer of the stator core and the 30 th slot of the radial 4 th layer of the stator core, the third conductor of the fourth coil unit is located in the 22 th slot of the radial 3 rd layer of the stator core and the 31 th slot of the radial 4 th layer of the stator core, that is, the pitch of 3 conductors of the fourth coil unit is a full pitch 9;

alternatively, as shown in fig. 9 and 17, in the seventh embodiment, the pitch of 2 of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 1 conductor is a short pitch, specifically, the first conductor of the fourth coil unit is located in the 20 th slot of the 3 rd layer and the 30 th slot of the 4 th layer in the radial direction of the stator core, the second conductor of the fourth coil unit is located in the 21 st slot of the 3 rd layer and the 31 th slot of the 4 th layer in the radial direction of the stator core, the third conductor of the fourth coil unit is located in the 22 th slot of the 3 rd layer and the 29 th slot of the 4 th layer in the radial direction of the stator core, that is, the pitch of 2 of the 3 conductors of the fourth coil unit is a long pitch 10 and the pitch of 1 conductor is a short pitch 7;

alternatively, as shown in fig. 18, in the seventh embodiment, the pitch of 1 of the 3 conductors of the fourth coil unit is a long pitch, and the pitch of 2 conductors is a short pitch, specifically, the first conductor of the fourth coil unit is located in the 20 th slot of the 3 rd layer and the 31 th slot of the 4 th layer in the radial direction of the stator core, the second conductor of the fourth coil unit is located in the 21 st slot of the 3 rd layer and the 29 th slot of the 4 th layer in the radial direction of the stator core, the third conductor of the fourth coil unit is located in the 22 nd slot of the 3 rd layer and the 30 th slot of the 4 th layer in the radial direction of the stator core, that is, the pitch of 1 of the 3 conductors of the fourth coil unit is the long pitch 11, and the pitch of 2 conductors is the short pitch 8;

illustratively, as shown in fig. 10 to 11, when M is greater than 4, the plurality of coil units of each phase winding further have a plurality of fifth coil units 500, the fifth coil units 500 are located on both sides of the third coil unit 300 in the same radial direction, the pitch of 3 conductors of the fifth coil units 500 is a full pitch, and/or the pitch of 2 conductors of the 3 conductors of the fifth coil units 500 is a long pitch and the pitch of 1 conductor is a short pitch; and/or the pitch of 1 conductor of the 3 conductors of the fifth coil unit 500 is a long pitch and the pitch of 2 conductors is a short pitch.

With reference to fig. 13 to 14, M in the eighth to ninth embodiments is 8, and when M is greater than 4, the plurality of coil units of each phase winding further comprise 8 fifth coil units 500, the first third coil unit is positioned on the 4 th layer, the 2 nd groove, the 3 rd groove, the 4 th groove and the 10 th groove, the 11 th groove and the 12 th groove of the radial layer of the stator core, the first fifth coil unit is positioned on the 1 st groove, the 2 nd groove, the 3 rd groove and the 10 th groove, the 11 th groove and the 12 th groove of the radial layer of the stator core, the second fifth coil unit is positioned on the 3 rd layer, the 10 th groove, the 11 th groove, the 12 th groove and the 19 th groove, the 20 th groove and the 21 st groove of the radial layer of the stator core, and the first fifth coil unit and the second fifth coil unit are positioned on the third coil unit and are positioned on the same radial direction of the third coil unit along the same radial direction of the stator core and are close to the central axis of the stator core; the second third coil unit is positioned in the radial 4 th layer and the 5 th layer of the stator core, the 11 th, 12 th, 13 th, 19 th, 20 th and 21 st slots, the first fifth coil unit is positioned in the radial 6 th layer and the 7 th layer of the stator core, the 2 nd, 3 rd, 4 th, 11 th, 12 th and 13 th slots, and the second fifth coil unit is positioned in the radial 6 th layer and the 7 th layer of the stator core, the 11 th, 12 th, 13 th, 20 th, 21 th and 22 th slots; the first fifth coil unit and the second fifth coil unit are positioned in the third coil unit, and are positioned in the direction close to the central axis of the stator core in the same radial direction of the third coil unit along the same radial direction of the stator core by a 10 th slot, a 11 th slot and a 12 th slot; accordingly, the positions of the remaining fifth coil unit and the third coil unit are the same with respect to the positions of the above-described fifth coil unit and the third coil unit, except for being located at different slots.

As shown in fig. 10 to 14, in the eighth to twelfth embodiments, the pitch of the 3 conductors of the fifth coil unit is a full pitch, specifically, the first conductor of the fifth coil unit is located in the 11 th slot of the 7 th layer and the 20 th slot of the 6 th layer in the radial direction of the stator core, the second conductor of the fifth coil unit is located in the 12 th slot of the 7 th layer and the 21 st slot of the 6 th layer in the radial direction of the stator core, the third conductor of the fifth coil unit is located in the 13 th slot of the 7 th layer and the 22 th slot of the 6 th layer in the radial direction of the stator core, that is, the pitch of the 3 conductors of the fourth coil unit is a full pitch 9;

alternatively, in the eighth to twelfth embodiments, the fifth coil unit may also have a long pitch of the pitch of two conductors of the 3 conductors of the fifth coil unit and a short pitch of the pitch of one conductor, specifically, the first conductor of the fifth coil unit is located in the 11 th slot of the 7 th layer and the 21 st slot of the 6 th layer in the radial direction of the stator core, the second conductor of the fifth coil unit is located in the 12 th slot of the 7 th layer and the 22 th slot of the 6 th layer in the radial direction of the stator core, the third conductor of the fifth coil unit is located in the 13 th slot of the 7 th layer and the 20 th slot of the 6 th layer in the radial direction of the stator core, that is, the pitch of two conductors of the 3 conductors of the fifth coil unit is the long pitch 10 and the pitch of one conductor is the short pitch 7;

alternatively, as shown in fig. 18, in the eighth to twelfth embodiments, the fifth coil unit may also be configured such that the pitch of one conductor of the 3 conductors of the fifth coil unit is a long pitch and the pitch of two conductors is a short pitch, specifically, the first conductor of the fifth coil unit is located in the 11 th slot of the 7 th layer and the 22 th slot of the 6 th layer in the radial direction of the stator core, the second conductor of the fifth coil unit is located in the 12 th slot of the 7 th layer and the 20 th slot of the 6 th layer in the radial direction of the stator core, the third conductor of the fifth coil unit is located in the 13 th slot of the 7 th layer and the 21 th slot of the 6 th layer in the radial direction of the stator core, that is, the pitch of one conductor of the 3 conductors of the fifth coil unit is the long pitch 11 and the pitch of two conductors is the short pitch 8;

illustratively, as shown in fig. 3 to 11, in the first to tenth embodiments, the lead end and the lead-out end of each phase winding are located at one end of the second axial connecting portion 200-1 and 200-2 of the stator core.

With reference to fig. 3 to 11, in the first to ninth embodiments, each phase winding includes two branch windings connected in parallel, and the lead-out wire of each branch winding may be located in any one of the circumferential slots of the stator core, in the first to ninth embodiments, the lead end U1 of the first branch winding is located at the 13 th slot of the 2 nd layer at one end of the second connection portion 200 in the axial direction of the stator core, the lead-out end U2 of the first branch winding is located at the 21 st slot of the 1 st layer at one end of the second connection portion 200 in the axial direction of the stator core, the lead end U3 of the second branch winding is located at the 13 th slot of the 4 th layer at one end of the second connection portion 200 in the axial direction of the stator core, and the lead-out end U4 of the second branch winding is located at the 22 nd slot of the 3 rd layer at one end of the second connection portion 200 in the axial direction of the stator core.

Illustratively, as shown in fig. 12, in the tenth embodiment, the lead end and the outlet end of each phase winding are located at one end of the stator core axial direction first connecting portion 100.

Referring to fig. 12, in a tenth embodiment, each phase winding includes two branch windings connected in parallel, the lead wire of each branch winding may be located in any one layer of the circumferential slots of the stator core, that is, the two connected slots of the first connection portion are opened to form a lead end and a lead out end, the lead end U1 of the first branch winding is led in from the 29 st slot of the 1 st layer at one end of the stator core axial direction first connection portion 100, the lead out end U2 of the first branch winding is led out from the 19 th slot of the 2 nd layer at one end of the stator core axial direction second connection portion 200, the lead end U3 of the second branch winding of the present application is led out from the 29 th slot of the 3 rd layer at one end of the stator core axial direction second connection portion 200, and the lead out end U4 of the second branch winding is led out from the 20 th slot of the 4 th layer at one end of the stator core axial direction second connection portion 200 The structure of each of the eleventh to twelfth embodiments may be the same as that of the tenth embodiment.

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

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

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

It will be understood by those skilled in the art that the present invention is not limited to the embodiments illustrated herein, and that various obvious changes, rearrangements and substitutions may be made therein by those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. A stator, 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;

the stator winding comprises a plurality of phase windings arranged on the stator core, and the number of slots of each pole and each phase of the stator winding is 3;

the method is characterized in that: the plurality of phase windings form M layers in the radial direction of the stator core, wherein M is an integral multiple of more than or equal to 4;

each phase winding includes K parallel branch windings, and K parallel branch windings include:

the coil units are positioned at the first end of the stator core in the axial direction, each coil unit comprises 3 conductors, the coil units are provided with K first coil units, K second coil units and a plurality of third coil units, the first coil units are positioned on the first layer of the stator core in the radial direction, the second coil units are positioned on the Mth layer of the stator core in the radial direction, the third coil units are positioned on the Mth/2 th layer and the Mth/2 +1 th layer of the stator core in the radial direction, and K is an integer greater than or equal to 1;

the stator core comprises a stator core, a plurality of first connecting parts and a plurality of second connecting parts, wherein the stator core is axially arranged at a second end of the stator core;

the pitch of at least 2 conductors in the third coil unit of the phase winding is greater than or equal to the pitch of the first connection portion of the phase winding, or the pitch of at least 2 conductors in the third coil unit of the phase winding is less than or equal to the pitch of the first connection portion of the phase winding.

2. A stator according to claim 1, characterized in that the pitch of the 3 conductors in the third coil unit of the phase winding is a long pitch or the pitch of the 3 conductors in the third coil unit of the phase winding is a short pitch.

3. The stator according to claim 1, wherein a pitch of 2 conductors of 3 conductors in the third coil unit of the phase winding is a long pitch and a pitch of 1 conductor is a short pitch; or 1 conductor of 3 conductors in the third coil unit of the phase winding has a long pitch and 2 conductors have a full pitch.

4. The stator according to claim 1, wherein a pitch of 2 conductors of 3 conductors in the third coil unit of the phase winding is a full pitch and a pitch of 1 conductor is a short pitch; or 1 conductor of 3 conductors in the third coil unit of the phase winding has a long pitch and 2 conductors have a short pitch.

5. The stator according to claim 1, wherein a pitch of 1 of the 3 conductors of the first coil unit is a long pitch and a pitch of 2 conductors is a short pitch, a pitch of 3 conductors of the second coil unit is a full pitch, or a pitch of 2 of the 3 conductors of the first coil unit is a long pitch and a pitch of 1 conductor is a short pitch, a pitch of 3 conductors of the second coil unit is a full pitch, and the third coil unit is located in the same radial direction as the first coil unit and the second coil unit.

6. The stator according to any one of claims 1 to 5, wherein the plurality of coil units of each of the phase windings further has a plurality of fourth coil units, the fourth coil units being located at the nth and N +1 st radial layers of the stator core, where N is an odd number; the pitch of the 3 conductors of the fourth coil unit is a full pitch, and/or the pitch of 2 conductors of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 1 conductor is a short pitch, and/or the pitch of 1 conductor of the 3 conductors of the fourth coil unit is a long pitch and the pitch of 2 conductors is a short pitch.

7. A stator according to claim 6, wherein when M is greater than 4, the plurality of coil units of each phase winding further comprises a plurality of fifth coil units located in the same radial direction as the third coil units, the pitch of the 3 conductors of the fifth coil units is a full pitch, and/or the pitch of 2 conductors of the 3 conductors of the fifth coil units is a long pitch and the pitch of 1 conductor is a short pitch; and/or the pitch of 1 conductor in the 3 conductors of the fifth coil unit is a long pitch and the pitch of 2 conductors is a short pitch.

8. The stator according to claim 7, wherein the outgoing line of each of the phase windings is located at one end of the stator core in the axial direction of the second connecting portion; or the outgoing line of each phase winding is positioned at one end of the first axial connecting part of the stator core.

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

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