CN110556935A

CN110556935A - stator assembly and motor

Info

Publication number: CN110556935A
Application number: CN201810551862.1A
Authority: CN
Inventors: 齐文明; 游斌; 舒圣浪
Original assignee: BYD Co Ltd
Current assignee: Changzhou Byd Automobile Co ltd; BYD Co Ltd
Priority date: 2018-05-31
Filing date: 2018-05-31
Publication date: 2019-12-10
Anticipated expiration: 2038-05-31
Also published as: WO2019228464A1; CN110556935B

Abstract

The invention discloses a stator assembly and a motor, wherein the stator assembly comprises a stator core and a stator winding, the stator core is provided with a plurality of stator slots, the stator slots are distributed along the circumferential direction of the stator core, each phase of first-path winding of the stator winding comprises a first winding part, a second winding part, a third winding part and a fourth winding part which are connected end to end, and each phase of second-path winding of the stator winding comprises a fifth winding part, a sixth winding part, a seventh winding part and an eighth winding part which are connected end to end. Therefore, the first outgoing lines and the first star point lines can be uniformly distributed at the welding end through the matching of the stator core and the stator winding, the height of the welding end can be fully utilized, the circulation phenomenon can be prevented, and the failure of the motor can be prevented.

Description

Stator assembly and motor

Technical Field

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

background

in the related technology, the stator assembly of the motor is in a wave winding mode, the outermost layer is wound to the innermost layer through waves, the reverse wave is wound to the outermost layer, the flat wire armature needing to be manufactured is various in types, both axial ends of the flat wire armature need to be welded, welding spots are multiple, and in addition, after the flat wire is off-line, the flat wire armature is difficult to accurately fix, the production cost is high, and the manufacturing process difficulty is large. From the analysis of the electrical connection, the wave winding form is that the voltage difference between different layers in the same groove is high, and the layers are easy to break down under high voltage, so that short circuit is caused, and the motor fails.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a stator assembly which can prevent the circulation phenomenon and the failure of the motor.

The invention further provides a motor.

The stator assembly is suitable for a z-slot 2 p-pole m-phase motor, the number of slots per pole per phase is q-z/m/(2 p), the number of parallel branches is a, and a is less than or equal to q, the stator assembly comprises a stator core and a stator winding, the stator core is provided with a plurality of stator slots, the stator slots are distributed along the circumferential direction of the stator core, the stator slots are respectively a1 st slot, a2 nd slot, …, an ith slot, …, an nth slot and … in the circumferential direction of the stator core, each stator slot is provided with r slot layers, and the r slot layers are respectively an a layer, a b layer, …, a jth layer, … and an r layer from the radial inner side to the outer side of the stator core; the first winding of each phase of the stator winding comprises a first winding part, a second winding part, a third winding part and a fourth winding part which are sequentially connected end to end, in the first winding part, the ith slot and the r layer are the starting ends of the first winding part, the (i-12) th slot and the r layer are the terminating ends of the first winding part, the first winding part comprises a first span section and a second span section, the first span section is from the ith slot and the r layer to the (i-6) th slot and the a layer, and in the first span section, the winding reciprocates between the ith slot and the (i-6) th slot and is wound from the radial outer side to the radial inner side of the stator core; the second step from the (i-6) th slot a-th layer to the (i-12) th slot r-th layer, in which the winding wire reciprocates between the (i-6) th slot and the (i-12) th slot and is wound from the radially inner side to the radially outer side of the stator core; within the second winding portion, the (i-12) th slot (r) th layer is a starting end of the second winding portion, the (i-23) th slot (r) th layer is a terminating end of the second winding portion, the second winding portion includes a third span, a fourth span and a fifth span, the r layer from the (i-12) th slot to the (i-17) th slot is a third span; the (i-17) th slot, the (a) th slot, and the (i-17) th slot are the fourth spanning section, and in the fourth spanning section, the winding wire reciprocates between the (i-17) th slot and the (i-11) th slot and is wound from the radial outer side to the radial inner side of the stator core; the (i-17) th slot (a) th layer to the (i-23) th slot (r) th layer is the fifth span in which the winding reciprocates between the (i-17) th slot and the (i-23) th slot and the winding is wound from the radially inner side to the radially outer side of the stator core; within the third winding portion, the (i-23) th slot nth layer is a starting end of the third winding portion, the (i-36) th slot nth layer is a terminating end of the third winding portion, the third winding portion comprises a sixth span, a seventh span and an eighth span, and the sixth span is from the (i-23) th slot nth layer to the (i-30) th slot nth layer; the (i-30) th slot, the (a-30) th slot, and the seventh jump section in which the winding wire reciprocates between the (i-30) th slot and the (i-24) th slot and is wound from the radially outer side to the radially inner side of the stator core; an (i-30) th slot (a) th layer to an (i-36) th slot (r) th layer is the eighth span within which a winding reciprocates between the (i-30) th slot and the (i-36) th slot and the winding is wound from a radially inner side to a radially outer side of the stator core; within the fourth winding portion, the (i-36) th slot th layer is the starting end of the fourth winding portion, the (i-41) th slot next-to-outer layer is the terminating end of the fourth winding portion, the fourth winding portion comprises a ninth span, a tenth span and an eleventh span, and the (i-36) th slot th layer to the (i-41) th slot th layer is the ninth span; the tenth jump from the (i-41) th slot layer to the (i-41) th slot layer a, in which a winding reciprocates between the (i-41) th slot and the (i-35) th slot and the winding is wound from a radially outer side to a radially inner side of the stator core; the eleventh step is from the (i-41) th slot a layer to the (i-41) th slot r layer, and the winding wire reciprocates between the (i-41) th slot and the (i-47) th slot in the eleventh step and is wound from the radial inner side to the radial outer side of the stator core, wherein the ith slot is an initial slot, and the ith slot r layer is connected with the first lead wire; a termination slot, there being 6 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting a first star point line; each phase of the second winding of the stator winding comprises a fifth winding part, a sixth winding part, a seventh winding part and an eighth winding part which are sequentially connected end to end, wherein in the fifth winding part, the (n-47) th layer of the slot is the starting end of the fifth winding part, the (n-11) th layer of the slot is the termination end of the fifth winding part, the fifth winding part comprises a twelfth span and a thirteenth span, the layer from the (n-47) th layer of the slot to the (n-5) th layer of the slot is the twelfth span, and in the twelfth span, the winding is reciprocated between the (n-47) th slot and the (n-5) th slot and is wound from the radial outer side to the radial inner side of the stator core; the (n-5) th slot (a) th layer to the (n-11) th slot (r) th layer is the thirteenth jump section in which the winding wire reciprocates between the (n-5) th slot and the (n-11) th slot and the winding wire is wound from the radially inner side to the radially outer side of the stator core; within the sixth winding portion, the (n-11) th slot nth layer is a starting end of the sixth winding portion, the (n-24) th slot nth layer is a terminating end of the sixth winding portion, the sixth winding portion includes a fourteenth span, a fifteenth span and a sixteenth span, the fourteenth span is from the (n-11) th slot nth layer to the (n-18) th slot nth layer; the (n-18) th slot, the (r) th slot, to the (n-18) th slot, the a-th layer being the fifteenth jump within which the winding reciprocates between the (n-18) th slot and the (n-12) th slot and the winding from the radially outer side to the radially inner side of the stator core; the sixteenth jump from the (n-18) th slot (a) th layer to the (n-24) th slot (r) th layer, within which the winding reciprocates between the (n-18) th slot and the (n-24) th slot and the winding is wound from the radially inner side to the radially outer side of the stator core; within the seventh winding portion, the (n-24) th slot nth layer is a starting end of the seventh winding portion, the (n-35) th slot nth layer is a terminating end of the seventh winding portion, the seventh winding portion includes a seventeenth span, an eighteenth span and a nineteenth span, the seventeenth span is from the (n-24) th slot nth layer to the (n-29) th slot nth layer; the (n-29) th slot, the (r) th slot, to the (n-29) th slot, the a th layer being the eighteenth jump within which a winding reciprocates between the (n-29) th slot and the (n-23) th slot and the winding is wound from a radially outer side to a radially inner side of the stator core; the (n-29) th slot a-th layer to the (n-35) th slot r-th layer are the nineteenth spans in which windings reciprocate between the (n-29) th slot and the (n-35) th slot and from the radially inner side to the radially outer side of the stator core; within the eighth winding portion, the (n-35) th slot nth layer is a starting end of the eighth winding portion, the (n-42) th slot next-to-outer layer is a terminating end of the eighth winding portion, the eighth winding portion includes a twentieth span, a twenty-first span, and a twenty-second span, the twentieth span being from the (n-35) th slot nth layer to the (n-42) th slot nth layer; the twenty-first step from the (n-42) th slot (r) th layer to the (n-42) th slot (a) th layer is the twenty-first step in which a winding wire reciprocates between the (n-42) th slot and the (n-36) th slot and the winding wire is wound from a radially outer side to a radially inner side of the stator core; the twenty-second span is from the (n-42) th slot a layer to the (n-42) th slot r layer, and in the twenty-second span, winding is reciprocated between the (n-42) th slot and the nth slot and is wound from the radial inner side to the radial outer side of the stator core, wherein the n-47 th slot is an initial slot, and the n-47 th slot r layer is connected with the second outgoing line; a termination slot, there being 4 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting the second dotted line.

according to the stator assembly provided by the embodiment of the invention, the first outgoing line and the first star point line can be uniformly arranged at the welding end through the matching of the stator core and the stator winding, the height of the welding end can be fully utilized, the circulation phenomenon can be prevented, and the failure of a motor can be prevented.

In some examples of the invention, n ═ i.

In some examples of the present invention, the stator winding includes a plurality of conductor segments, each of the conductor segments including a bent portion and first and second in-slot portions connected to the bent portion, respectively, the first and second in-slot portions of the plurality of conductor segments located in adjacent layers being weld-connected at the weld end.

In some examples of the invention, the conductor segments include a first type of conductor segment, a second type of conductor segment, and a third type of conductor segment, a pitch between the first in-slot portion and the second in-slot portion of the first type of conductor segment is (y-1) stator slots, a pitch between the first in-slot portion and the second in-slot portion of the second type of conductor segment is y stator slots, and a pitch between the first in-slot portion and the second in-slot portion of the third type of conductor segment is (y +1) stator slots, where y is an integer and y is z/2 p.

in some examples of the invention the first type of conductor segment is located in the third, ninth, seventeenth span, the first in-slot portion of the first type of conductor segment being located in an outermost layer of one stator slot and the second in-slot portion of the first type of conductor segment being located in an outermost layer of another stator slot.

In some examples of the invention, the second type of conductor segment is located at a first span, a second span, a fourth span, a fifth span, a seventh span, an eighth span, a tenth span, an eleventh span, a twelfth span, a thirteenth span, a fifteenth span, a sixteenth span, an eighteenth span, a nineteenth span, a twenty-first span, a twenty-second span; the second type of conductor segment comprises conductor segments of the same layer and conductor segments of different layers, wherein the first in-slot part of the conductor segment of the same layer is positioned in the first in-slot part and positioned on the outermost layer of one stator slot, and the second in-slot part is positioned on the outermost layer of the other stator slot, or the first in-slot part of the conductor segment of the same layer is positioned in the first in-slot part and positioned on the innermost layer of one stator slot, and the second in-slot part is positioned on the innermost layer of the other stator slot; the first in-slot part of the conductor segment of the different layer is positioned in the middle slot layer of one stator slot, the second in-slot part is positioned in the middle slot layer of the other stator slot, and the different layer strides.

in some examples of the invention the conductor segments of the third type are located at a sixth span, a fourteenth span, a twentieth span, the first in-slot portions of the conductor segments of the third type are located at outermost layers of one stator slot and the second in-slot portions of the conductor segments of the third type are located at outermost layers of another stator slot.

the motor comprises the stator assembly.

The stator assembly is suitable for a z-slot 2 p-level m-phase motor, the number of slots per pole per phase is q-z/m/(2 p), the number of parallel branches is a, and a is less than or equal to q, the stator assembly comprises a stator core and a stator winding, the stator core is provided with a plurality of stator slots, the stator slots are distributed along the circumferential direction of the stator core, in the anticlockwise direction of the circumferential direction of the stator core, the stator slots are respectively a1 st slot, a2 nd slot, …, an i-th slot, …, an n-th slot and …, each stator slot is provided with 6 slot layers, and the 6 slot layers are respectively an a-th layer, a b-th layer, … and an f-th layer from the radial inner side to the outer side of the stator core; the first winding of each phase of the stator winding comprises a first winding part, a second winding part, a third winding part and a fourth winding part which are sequentially connected end to end, in the first winding part, the 1 st slot f layer is the starting end of the first winding part, the 37 th slot f layer is the ending end of the first winding part, the first winding part comprises a first span section and a second span section, the first span section is from the 1 st slot f layer to the 43 th slot a layer, in the first span section, the winding reciprocates between the 1 st slot and the 43 th slot and is wound from the radial outer side to the radial inner side of the stator core; the second step is from the 43 rd slot a layer to the 37 th slot f layer, and in the second step, the winding is reciprocated between the 43 th slot and the 37 th slot and is wound from the radial inner side to the radial outer side of the stator core; in the second winding part, the 37 th slot fth layer is the starting end of the second winding part, the 26 th slot fth layer is the terminating end of the second winding part, the second winding part comprises a third span section, a fourth span section and a fifth span section, and the fth layer from the 37 th slot fth layer to the 32 th slot fth layer is the third span section; the fourth step is from the 32 th slot (f) th layer to the 32 nd slot (a) th layer, and in the fourth step, the winding wire reciprocates between the 32 th slot and the 38 th slot and is wound from the radial outer side to the radial inner side of the stator core; the layer a from the 32 th slot to the 26 th slot is the fifth span, and the winding wire reciprocates between the 32 th slot and the 26 th slot and is wound from the radial inner side to the radial outer side of the stator core in the fifth span; in the third winding part, the 26 th slot f-th layer is the starting end of the third winding part, the 13 th slot f-th layer is the terminating end of the third winding part, the third winding part comprises a sixth span section, a seventh span section and an eighth span section, and the f-th layer from the 26 th slot f-th layer to the 19 th slot f-th layer is a sixth span section; the seventh jump from the 19 th slot (f) th layer to the 19 th slot (a) th layer, in which the winding wire reciprocates between the 19 th slot and the 25 th slot and is wound from the radially outer side to the radially inner side of the stator core; the layer a from the 19 th slot to the 13 th slot is the eighth span, and the winding reciprocates between the 19 th slot and the 13 th slot and is wound from the radial inner side to the radial outer side of the stator core in the eighth span; in the fourth winding part, the 13 th slot f-th layer is the starting end of the fourth winding part, the 8 th slot sub-outer layer is the termination end of the fourth winding part, the fourth winding part comprises a ninth span section, a tenth span section and an eleventh span section, and the f-th layer from the 13 th slot f-th layer to the 8 th slot f-th layer is a ninth span section; the tenth step is from the 8 th slot (f) th layer to the 8 th slot (a) th layer, and in the tenth step, the winding wire reciprocates between the 8 th slot and the 14 th slot and is wound from the radially outer side to the radially inner side of the stator core; the second layer from the 8 th slot a to the 8 th slot is the eleventh span, and in the eleventh span, a winding is reciprocated between the 8 th slot and the 2 nd slot and wound from the radial inner side to the radial outer side of the stator core, wherein the 1 st slot is an initial slot, and the 1 st slot f layer is connected with a first outgoing line; a termination slot, there being 6 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting a first star point line; each phase of second winding of the stator winding comprises a fifth winding part, a sixth winding part, a seventh winding part and an eighth winding part, and the fifth winding part, the sixth winding part, the seventh winding part and the eighth winding part are connected in sequence; in the fifth winding portion, the 2 nd slot f-th layer is a starting end of the fifth winding portion, the 38 th slot f-th layer is a terminating end of the fifth winding portion, the fifth winding portion includes a twelfth span and a thirteenth span, the a-th layer is the twelfth span from the 2 nd slot f-th layer to the 44 th slot, and in the twelfth span, a winding wire is wound back and forth between the 2 nd slot and the 44 th slot and is wound from a radially outer side to a radially inner side of the stator core; the layer f from the 44 th to the 38 th slots is the thirteenth span, the winding wire reciprocates between the 44 th and the 38 th slots and is wound from the radially inner side to the radially outer side of the stator core in the thirteenth span, the layer f from the 38 th slot is the starting end of the sixth winding portion in the sixth winding portion, the layer f from the 25 th slot is the terminating end of the sixth winding portion, the sixth winding portion includes the fourteenth span, the fifteenth span and the sixteenth span, and the layer f from the 38 th to the 31 th slot is the fourteenth span; the fifteenth step is a layer from the 31 st slot (f) th layer to the 31 st slot (a), and in the fifteenth step, the winding wire reciprocates between the 31 st slot and the 37 th slot and is wound from the radially outer side to the radially inner side of the stator core; the sixteenth step from the 31 st slot, the a th layer to the 25 th slot, in which the winding wire reciprocates between the 31 st slot and the 25 th slot and is wound from the radially inner side to the radially outer side of the stator core; in the seventh winding part, the 25 th slot f-th layer is the starting end of the seventh winding part, the 14 th slot f-th layer is the terminating end of the seventh winding part, the seventh winding part comprises a seventeenth span, an eighteenth span and a nineteenth span, and the f-th layer from the 25 th slot f-th layer to the 20 th slot f-th layer is a seventeenth span; the layer a from the 20 th slot f to the 20 th slot is the eighteenth jump in which the winding reciprocates between the 20 th slot and the 26 th slot and is wound from the radially outer side to the radially inner side of the stator core; the nineteenth step is the f-th step from the 20 th slot a-th layer to the 14 th slot, and in the nineteenth step, the winding wire reciprocates between the 20 th slot and the 14 th slot and is wound from the radially inner side to the radially outer side of the stator core; in the eighth winding part, the 14 th slot f-th layer is the starting end of the eighth winding part, the 7 th slot sub-outer layer is the terminating end of the eighth winding part, the eighth winding part comprises a twentieth span, a twenty-first span and a twenty-second span, and the twentieth span is from the 14 th slot f-th layer to the 7 th slot f-th layer; the twenty-first step from the 7 th slot (fth) to the 7 th slot (a) is a winding reciprocating between the 7 th slot and the 13 th slot and from the radially outer side to the radially inner side of the stator core within the twenty-first step; the twenty-second step is from the 7 th slot a layer to the 7 th slot e layer, and the winding is reciprocated between the 7 th slot and the 1 st slot and wound from the radial inner side to the radial outer side of the stator core in the twenty-second step, wherein the 2 nd slot is an initial slot, and the 2 nd slot f layer is connected with the second outgoing line; a termination slot, there being 4 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting the second dotted line.

drawings

FIG. 1 is a top view of a stator winding according to an embodiment of the present invention;

Fig. 2 is a winding diagram of a first winding of a stator winding according to an embodiment of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2; (ii) a

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is an enlarged view at C in FIG. 2;

Fig. 6 is a winding diagram of a second routing of the stator winding according to an embodiment of the present invention;

FIG. 7 is an enlarged view at D of FIG. 6;

FIG. 8 is an enlarged view at E in FIG. 6;

FIG. 9 is an enlarged view at F of FIG. 6;

FIG. 10 is a schematic view of a stator assembly according to an embodiment of the present invention;

FIG. 11 is an enlarged view at G of FIG. 10;

FIG. 12 is a schematic illustration of a first type of conductor segment of a second type of conductor segment in accordance with an embodiment of the present invention;

FIG. 13 is a schematic illustration of a second one of a second type of conductor segments in accordance with an embodiment of the present invention;

FIG. 14 is a schematic illustration of a third one of the second type of conductor segments in accordance with an embodiment of the present invention;

FIG. 15 is a schematic illustration of a fourth one of the second type of conductor segments in accordance with an embodiment of the present invention;

FIG. 16 is a schematic illustration of a first type of conductor segment according to an embodiment of the present invention;

FIG. 17 is a schematic illustration of a third type of conductor segment in accordance with an embodiment of the present invention;

Fig. 18 is a wiring diagram of a first routing line according to an embodiment of the present invention;

FIG. 19 is a wiring diagram of a second routing line according to an embodiment of the present invention;

fig. 20 is a three-phase two-way wiring diagram according to an embodiment of the present invention.

Reference numerals:

a stator assembly 10;

A stator core 1; a stator slot 11; a trough layer 12;

a stator winding 2;

A first winding 21;

The first winding portion 211; a first span 2111; a second span 2112;

A second winding portion 212; a third span 2121; a fourth span 2122; a fifth span 2123;

A third winding portion 213; a sixth span 2131; a seventh hop 2132; an eighth hop 2133;

a fourth winding portion 214; a ninth span 2141; tenth span 2142; an eleventh span 2143;

a second routing line 22;

a fifth winding portion 221; twelfth span 2211; a thirteenth span 2212;

A sixth winding portion 222; a fourteenth hop 2221; a fifteenth hop 2222; a sixteenth span 2223;

the seventh winding portion 223; a seventeenth span 2231; an eighteenth hop 2232; a nineteenth span 2233;

an eighth winding portion 224; a twentieth span 2241; a twenty-first span 2242; a twenty-second span 2243;

the first-type conductor segments 23; a bent portion 231; a weld end 232; a first in-slot portion 233; a second in-slot portion 234;

A second type of conductor segment 24; a first type conductor segment 241; a second conductor segment 242; the third conductor segment 243; a fourth conductor segment 244;

a third type of conductor segment 25;

a first outgoing line 3; a first star point line 4; a second outgoing line 5; the second dotted line 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

a stator assembly 10 according to an embodiment of the present invention is described below with reference to fig. 1-20.

as shown in fig. 1 to 20, according to the stator assembly 10 of the embodiment of the present invention, the stator assembly 10 is applied to a z-slot 2 p-pole m-phase motor, the number of slots per pole per phase is q ═ z/m/(2p), the number of parallel branches is a, a ≦ q, where z is the number of stator slots 11, m is the number of phases, and 2p is the number of poles, where the stator assembly 10 is applied to a z-slot 2 p-pole m-phase motor, where the number of slots z may be 24, 48, 72, etc., the number of phases m may be three-phase, two-phase, or single-phase, the stator assembly 10 may be applied to an 8-pole 48-slot 3-phase motor, that is, the number of stator slots 11 z ═ 48, and the number of phases m is 3, where three-phase includes U-phase, V-phase, and W-phase, and the number of poles 2p may be 8-pole, 4-pole, etc.

The stator assembly 10 may include a stator core 1 and a stator winding 2. The stator core 1 has a plurality of stator slots 11, the plurality of stator slots 11 are distributed along the circumferential direction of the stator core 1, the present invention takes the counterclockwise direction of the circumferential direction as an example, in the counterclockwise direction of the circumferential direction of the stator core 1, the plurality of stator slots 11 are respectively the 1 st slot, the 2 nd slot, …, the i-th slot, …, the n-th slot, …, each stator slot 11 has r slot layers 12, the r slot layers 12 are respectively the a-th layer, the b-th layer, …, the j-th layer, …, and the r-th layer in the directions from the radial inside to the outside of the stator core 1, it should be explained that the r-th layer is the outermost slot layer 12, the up-down direction in fig. 2 refers to the radial direction of the stator core 1, the lower direction in fig. 2 is the radial inside of the stator core 1, and the upper direction in fig. 2 is the radial outside of the stator core 1.

The first winding wire 21 of each phase of the stator winding 2 may include: the first winding portion 211, the second winding portion 212, the third winding portion 213 and the fourth winding portion 214 are connected end to end in sequence, in the first winding portion 211, the ith slot and the r layer are the starting ends of the first winding portion 211, and the (i-12) th slot and the r layer are the terminating ends of the first winding portion 211.

it should be noted that, in the process of counting the number of slots, when a certain slot needs to be determined, the i-th slot may be used as a starting point, when the number is counted to the "i- \ + th" slot, wherein when "-" is between i and x, "" slots are counted in the counterclockwise direction shown in fig. 1, and when "+" is between i and x, "" slots are counted in the clockwise direction shown in fig. 1. For example, when it is necessary to count up to the "i-5" th slot, where "-" is present between i and 5, the "5" slots are counted in the counterclockwise direction shown in fig. 1; for another example, when the number of the "i + 1" th slots is required, wherein "+" is provided between i and 1, the number of "1" slots is counted along the clockwise direction shown in fig. 1.

The first winding portion 211 may include a first jump 2111 and a second jump 2112, the first jump 2111 from the ith slot r layer to the (i-6) th slot a layer, and the winding wire reciprocates between the ith slot and the (i-6) th slot and is wound from the radially outer side to the radially inner side of the stator core within the first jump 2111. The a-th slot from the (i-6) th slot to the (i-12) th slot is a second jump 2112, and in the second jump 2112, the winding is reciprocated between the (i-6) th slot and the (i-12) th slot and wound from the radially inner side to the radially outer side of the stator core.

In the second winding portion 212, the (i-12) th slot nth layer is the starting end of the second winding portion 212, and the (i-23) th slot nth layer is the terminating end of the second winding portion 212.

The second winding portion 212 may include: third, fourth and fifth spans 2121, 2122 and 2123, the r-th layer from the (i-12) th slot to the (i-17) th slot being the third span 2121, the r-th layer from the (i-17) th slot to the (i-17) th slot being the fourth span 2122, the winding reciprocating between the (i-17) th slot and the (i-11) th slot and being wound from the radial outer side to the radial inner side of the stator core within the fourth span 2122, the r-th layer from the (i-17) th slot to the (i-23) th slot being the fifth span 2123, the winding reciprocating between the (i-17) th slot and the (i-23) th slot and being wound from the radial inner side to the radial outer side of the stator core within the fifth span 2123.

in the third winding portion 213, the (i-23) th slot nth layer is the starting end of the third winding portion 213, the (i-36) th slot nth layer is the terminating end of the third winding portion 213, the third winding portion 213 may include a sixth span 2131, a seventh span 2132 and an eighth span 2133, the (i-23) th slot nth layer to the (i-30) th slot nth layer is the sixth span 2131; the nth layer from the (i-30) th slot to the (i-30) th slot is a seventh jump 2132, the winding wire reciprocates between the (i-30) th slot and the (i-24) th slot in the seventh jump 2132 and is wound from the radially outer side to the radially inner side of the stator core, the nth layer from the (i-30) th slot to the (i-36) th slot is an eighth jump 2133, and the winding wire reciprocates between the (i-30) th slot and the (i-36) th slot in the eighth jump 2133 and is wound from the radially inner side to the radially outer side of the stator core.

In the fourth winding portion 214, the (i-36) th slot nth layer is a starting end of the fourth winding portion 214, the (i-41) th slot next outer layer is a terminating end of the fourth winding portion 214, the fourth winding portion 214 may include a ninth span 2141, a tenth span 2142, and an eleventh span 2143, the (i-36) th layer is the ninth span 2141 from the (i-36) th slot nth layer to the (i-41) th slot nth layer, the (i-41) th layer to the (i-41) th slot nth layer is the tenth span 2142, in the tenth span 2142, the winding wire reciprocates between the (i-41) th slot and the (i-35) th slot and is wound from a radially outer side to a radially inner side of the stator core, the (i-41) th slot a layer to the (i-41) th slot next outer layer is the eleventh span 2143, in the eleventh span 2143, the winding wire is wound between an (i-41) th slot and an (i-47) th slot in a reciprocating manner from the radial inner side to the radial outer side of the stator core, wherein the ith slot is an initial slot, the ith slot is connected with the first outgoing line 3 at the r layer, a termination slot is formed, 6 stator slots 11 are formed between the termination slot and the initial slot, and the outermost layer of the termination slot is connected with the first star point line 4.

According to an embodiment of the present invention, taking an 8-pole 48-slot motor as an example, the wiring scheme of the two-way six-turn stator winding 2 is specifically wired as follows, and for convenience of description, it is now specified that 1a represents the 1 st layer of the slot numbered 1, and similarly, 48f represents the 6 th layer of the slot numbered 48.

the wiring method comprises the following steps: three groups of coils of the same layer span on the sixth layer (the outermost layer f) of each phase are inner and outer sleeve coils, the span of the inner and outer sleeve coils is respectively 5 and 7, and the span of the other coils is 6.

As shown in fig. 2, the winding method of the first winding 21 of each phase of the stator winding 2 is described, where 1f is the first lead line 3, 8e is the first star point line 4, the winding start point of the first winding 21 of each phase of the stator winding 2 is 1f, and the winding method of the first winding 21 of each phase of the stator winding 2 specifically includes:

1f- >43f- >1e- >43d- >1c- >43b- >1a- >43a- >37b- >43c- >37d- >43e- >37f- >32f (third span 2121) - >38e- >32d- >38c- >32b- >38a- >32a- >26b- >32c- >26d- >32e- >26f- >19f (sixth span 2131) - >25e- >19d- >25c- >19b- >25a- >19a- >13b- >19c- >13d- >19e- >13f- >8f (ninth span 2141) - >14e- >8d- >14c- >8a- >2b- >8c- >2d- >8 e.

the winding is carried out through the winding mode, the winding structure of the first path of winding 21 of each phase of the stator winding 2 can be optimized, the winding mode enables the first outgoing line 3 and the first star point line 4 to be uniformly distributed at the welding end, and the height of the welding end can be fully utilized.

It should be noted that, in the process of counting the number of slots, when a certain slot needs to be determined, the nth slot may be used as a starting point, when the number is required to be counted to the "n- \ + th" slot, wherein when "-" is between n and x, the "" -number of slots are counted in the counterclockwise direction shown in fig. 1, and when "+" is between n and x, the "" -number of slots are counted in the clockwise direction shown in fig. 1. For example, when it is necessary to count up to the "n-47" th slot, where "-" is present between n and 47, the "47" slots are counted in the counterclockwise direction shown in fig. 1; for another example, when the number of the "n + 1" th slots is required, wherein "+" is provided between n and 1, the number of "1" slots is counted along the clockwise direction shown in fig. 1.

As shown in fig. 6 to 9, each phase of the second routing wire 22 of the stator winding 2 may include: a fifth winding part 221, a sixth winding part 222, a seventh winding part 223, and an eighth winding part 224 connected end to end in this order, in the fifth winding part 221, the (n-47) th slot r layer is the starting end of the fifth winding part 221, the (n-11) th slot r layer is the terminating end of the fifth winding part 221, the fifth winding part 221 includes a twelfth flying section 2211 and a thirteenth flying section 2212, the r layer from the (n-47) th slot to the (n-5) th slot a layer is the twelfth flying section 2211, in the twelfth flying section 2211, the winding is reciprocated between the (n-47) th slot and the (n-5) th slot and wound from the radial outer side to the radial inner side of the stator core, the r layer from the (n-5) th slot a layer to the (n-11) th slot is the thirteenth flying section 2212, in the thirteenth flying section 2212, the winding wire reciprocates between the (n-5) th slot and the (n-11) th slot and is wound from a radially inner side to a radially outer side of the stator core.

In the sixth winding part 222, the (n-11) th slot nth layer is a start end of the sixth winding part 222, the (n-24) th slot nth layer is a termination end of the sixth winding part 222, the sixth winding part 222 may include a fourteenth span 2221, a fifteenth span 2222 and a sixteenth span 2223, the (n-11) th slot nth layer from the (n-11) th slot nth layer to the (n-18) th slot nth layer is the fourteenth span 2221, the (n-18) th slot nth layer to the (n-18) th slot a layer is the fifteenth span 2222, in the fifteenth span 2222, the winding is reciprocated between the (n-18) th slot and the (n-12) th slot and wound from a radially outer side to a radially inner side of the stator core, the (n-18) th slot a layer to the (n-24) th slot nth layer is the sixteenth span 2223, in the sixteenth span 2223, the winding wire reciprocates between the (n-18) th slot and the (n-24) th slot and is wound from a radially inner side to a radially outer side of the stator core.

In the seventh winding portion 223, the (n-24) th slot nth layer is a starting end of the seventh winding portion 223, the (n-35) th slot nth layer is a terminating end of the seventh winding portion 223, the seventh winding portion 223 may include a seventeenth span 2231, an eighteenth span 2232, and a nineteenth span 2233, the nth layer is the seventeenth span 2231 from the (n-24) th slot nth layer to the (n-29) th slot nth layer, the eighteenth span 2232 from the (n-29) th slot nth layer to the (n-29) th slot nth layer a, the winding wire reciprocates between the (n-29) th slot and the (n-23) th slot in the eighteenth span 2232 and is wound from a radially outer side to a radially inner side of the stator core, the eleventh layer is a tenth span 2233 from the (n-29) th slot a layer to the (n-35) th slot nth span 2233, the nineteenth span 2233, the winding wire reciprocates between the (n-29) th slot and the (n-35) th slot and is wound from a radially inner side to a radially outer side of the stator core.

In the eighth winding section 224, the (n-35) th slot r layer is a start end of the eighth winding section 224, the (n-42) th slot sub-outer layer is a termination end of the eighth winding section 224, the eighth winding section 224 may include a twentieth span 2241, a twenty-first span 2242 and a twenty-second span 2243, the (n-35) th slot r layer from the (n-35) th slot r layer to the (n-42) th slot r layer is the twentieth span 2241, the (n-42) th slot r layer to the (n-42) th slot a layer is the twenty-first span 2242, in the twenty-first span 2242, the winding wire reciprocates between the (n-42) th slot and the (n-36) th slot and is wound from a radial outer side to a radial inner side of the stator core, the (n-42) th slot a layer to the (n-42) th slot sub-outer layer is the twenty-second span 2243, in the twenty-second spanning section 2243, the winding wire reciprocates between the (n-42) th slot, which is the initial slot, and the nth slot, which is the r-th layer connected to the second outgoing line 5, and the nth slot, which is the radially inner side to the radially outer side of the stator core; the end slots, between which there are 4 stator slots 11, are connected with the initial slots, the outermost layer of which connects the second star point line 6.

as shown in fig. 6, the winding method of the second winding 22 of each phase of the stator winding 2 is described, 2f is the second outgoing line 5, 7e is the second star point line 6, the winding start point of the second winding 22 of each phase of the stator winding 2 is 2f, and the winding method of the first winding 21 of each phase of the stator winding 2 is specifically described as follows:

2f- >44f- >2e- >44d- >2c- >44b- >2a- >44a- >38b- >44c- >38d- >44e- >38f- >31f (fourteenth span 2221) - >37e- >31d- >37c- >31b- >37a- >31a- >25b- >31c- >25d- >31e- >25f- >20f (seventeenth span 2231) - >26e- >20d- >26c- >20b- >26a- >20a- >14b- >20c- >14d- >20e- >14f- >7f (twentieth span 2241) - >13e- >7d- >13c- >7b- >13a- >7a- > 1- >7a- >1b- >7c- >1d- >7 e.

The winding is carried out in the winding mode, the winding structure of each phase of the second path of winding 22 of the stator winding 2 can be optimized, the second outgoing line 5 and the second star point line 6 can be uniformly arranged at the welding end in the winding mode, and the height of the welding end can be fully utilized.

in addition, the number of the stator winding 2 is easy to adjust, the first star point line 4 of the first winding 21 of each phase of the stator winding 2 and the second outgoing line 5 of the second winding 22 of each phase of the stator winding 2 are twisted and welded, that is, the two windings can be changed into one winding, unbalanced current is not easy to generate during the number adjustment, the circulation phenomenon can be prevented, and the failure of the motor can be prevented.

in addition, in the winding process, the sixth spanning section 2131, the ninth spanning section 2141 and the third spanning section 2121 are provided with pitches different from those of other spanning sections, so that the potential vector of the stator slot 11 is balanced, the potential phase angle difference of the slot moment angle is restrained, and finally the potential balance among sub circuits is realized, the internal circulation of the stator winding 2 can be restrained, the low temperature rise effect is achieved, the circulation is restrained, the harmonic electromagnetic excitation generated by the circulation can be restrained, and the vibration and the noise during the operation of the motor can be greatly restrained.

Therefore, the stator core 1 and the stator winding 2 are matched, the first outgoing line 3 and the first star point line 4 can be uniformly arranged at the welding end, the height of the welding end can be fully utilized, the circulation phenomenon can be prevented, and the failure of the motor can be prevented.

In some embodiments, as shown in fig. 2 and fig. 6, n is i, it should be explained that the ith slot is the 1 st slot in fig. 2, and the nth slot is the 1 st slot in fig. 6, such an arrangement enables the arrangement of the first routing wire 21 and the second routing wire 22 of each phase to be more reasonable, and the winding structure of the stator winding 2 can be optimized, so that the working performance of the stator winding 2 can be improved.

in some embodiments, the stator winding 2 may include: a plurality of conductor segments, each of which may include a bent portion 231 and first and second in-slot portions 233 and 234 connected to the bent portion 231, respectively, the first and second in-slot portions 233 and 234 of the plurality of conductor segments located at adjacent layers being welded at the welding end 232. The first in-slot portion 233 passes through one of the slot layers in one of the stator slots 11, the second in-slot portion 234 passes through one of the slot layers in the other stator slot 11, and the first in-slot portion 233 and the second in-slot portion 234 pass through the stator slots 11 with their ends extending beyond the stator core 1.

The end of the first in-slot portion 233 remote from the bending portion 231 is located outside the stator slot 11, which constitutes a welding end 232, and correspondingly, the end of the second in-slot portion 234 remote from the bending portion 231 is located outside the stator slot 11, which constitutes another welding end 232.

The conductor segments are non-circular in any cross-section perpendicular to their direction of extension, and as an embodiment are rectangular in cross-section. Alternatively, any cross section of the U-shaped conductor segments is rectangular in shape, the shorter sides of the rectangle being perpendicular to the bottom wall of the stator slot 11. Further, the cross-sectional areas of the U-shaped conductor segments are equal in the extending direction of the U-shaped conductor segments. When a plurality of conductor segments are simultaneously inserted into the stator slots 11 of the stator core 1, interference between adjacent conductor segments is more effectively prevented.

In some embodiments, as shown in fig. 12-17, the conductor segments may comprise a first type of conductor segment 23, a second type of conductor segment 24, and a third type of conductor segment 25, the pitch between the first in-slot portion 233 and the second in-slot portion 234 of the first type of conductor segment 23 being (y-1) stator slots 11, the pitch between the first in-slot portion 233 and the second in-slot portion 234 of the second type of conductor segment 24 being y stator slots 11, and the pitch between the first in-slot portion 233 and the second in-slot portion 234 of the third type of conductor segment 25 being (y +1) stator slots 11, where y is an integer and y is z/2 p.

In some embodiments, the first-type conductor segments 23 are located at the third, ninth, and seventeenth spans 2121, 2141, 2231, the first in-slot portions 233 of the first-type conductor segments 23 are located at the outermost layer of one stator slot 11, and the second in-slot portions 234 of the first-type conductor segments 23 are located at the outermost layer of another stator slot 11.

in some embodiments, the conductor segments 24 of the second type are located at the first span 2111, the second span 2112, the fourth span 2122, the fifth span 2123, the seventh span 2132, the eighth span 2133, the tenth span 2142, the eleventh span 2143, the twelfth span 2211, the thirteenth span 2212, the fifteenth span 2222, the sixteenth span 2223, the eighteenth span 2232, the nineteenth span 2233, the twenty-first span 2242, and the twenty-second span 2243.

The conductor segments 24 of the second type may comprise conductor segments of the same layer and conductor segments of different layers, the first in-slot portions 233 of conductor segments of the same layer being located in the first in-slot portions 233 in the outermost layer of one stator slot 11 and the second in-slot portions 234 in the outermost layer of another stator slot 11, or the first in-slot portions 233 of conductor segments of the same layer being located in the innermost layer of one stator slot 11 and the second in-slot portions 234 in the innermost layer of another stator slot 11, the first in-slot portions 233 of conductor segments of different layers being located in the middle slot layers 12 of one stator slot 11 and the second in-slot portions 234 being located in the middle slot layers 12 of another stator slot 11, with different layer spans. The utility model provides a wire winding mode, the kind of required conductor section is less relatively, and the molding process of conductor section is simple, and required production facility is few, can carry out batch production, simultaneously, uses this conductor section, can reduce welding end 232 solder joint quantity, can reduce manufacturing cost.

in some embodiments, the conductor segments 25 of the third type are located at the sixth crossover 2131, the fourteenth crossover 2221, the twentieth crossover 2241, the first in-slot portions 233 of the conductor segments 25 of the third type are located at the outermost layer of one stator slot 11, and the second in-slot portions 234 of the conductor segments 25 of the third type are located at the outermost layer of another stator slot 11.

the motor according to the embodiment of the invention comprises the stator assembly 10 of the above embodiment, the stator assembly 10 is arranged and installed on the motor, and the stator assembly 10 can enable the first outgoing line 3 and the first star point line 4 to be arranged at the welding end, so that the height of the welding end can be fully utilized, the circulation phenomenon can be prevented, the failure of the motor can be prevented, and the working reliability of the motor can be further ensured.

According to a specific embodiment of the present invention, the stator assembly 10 is suitable for a z-slot 2 p-stage m-phase motor, the number of slots per pole per phase is q ═ z/m/(2p), the number of parallel branches is a, a ≦ q, the stator assembly 10 may include a stator core 1 and a stator winding 2, the stator core 1 has a plurality of stator slots 11, the plurality of stator slots 11 are distributed along the circumferential direction of the stator core 1, in the counterclockwise direction of the circumferential direction of the stator core 1, the plurality of stator slots 11 are respectively a1 st slot, a2 nd slot, …, an i th slot, …, an n th slot, and …, each stator slot 11 has 6 slot layers, and the 6 slot layers are respectively an a-th layer, a b-th layer, …, and an f-th layer in the direction from the radial inner side to the outer side of the stator core 1.

the first winding wire 21 of each phase of the stator winding 2 may include a first winding portion 211, a second winding portion 212, a third winding portion 213 and a fourth winding portion 214 connected end to end in this order, within the first winding portion 211, the 1 st slot fth layer is the starting end of the first winding portion 211, the 37 th slot fth layer is the terminating end of the first winding portion 211, the first winding portion 211 may include a first span 2111 and a second span 2112, the a-th span 2111 from the 1 st slot fth layer to the 43 th slot a, in the first jump section 2111, the winding wire reciprocates between the 1 st slot and the 43 th slot and is wound from the radially outer side to the radially inner side of the stator core 1, the a-th layer from the 43 th slot to the 37 th slot is a second jump section 2112, in the second skip section 2112, the winding wire reciprocates between the 43 th slot and the 37 th slot and is wound from the radially inner side to the radially outer side of the stator core 1.

In the second winding portion 212, the 37 th slot f-th layer is a starting end of the second winding portion 212, the 26 th slot f-th layer is a terminating end of the second winding portion 212, the second winding portion 212 may include a third span 2121, a fourth span 2122, and a fifth span 2123, the f-th layer from the 37 th slot to the 32 th slot is a third span 2121, the f-th layer from the 32 th slot to the 32 th slot is a fourth span 2122, in the fourth span 2122, the winding wire reciprocates between the 32 th slot and the 38 th slot and is wound from a radial outer side to a radial inner side of the stator core 1, the f-th layer from the 32 th slot to the 26 th slot is a fifth span 2123, and in the fifth span 2123, the winding wire reciprocates between the 32 th slot and the 26 th slot and is wound from the radial inner side to the radial outer side of the stator core 1.

In the third winding portion 213, the 26 th slot f-th layer is a starting end of the third winding portion 213, the 13 th slot f-th layer is a terminating end of the third winding portion 213, the third winding portion 213 may include a sixth span 2131, a seventh span 2132, and an eighth span 2133, the f-th layer from the 26 th slot to the 19 th slot is the sixth span 2131, the f-th layer from the 19 th slot to the 19 th slot a-th layer is the seventh span 2132, in the seventh span 2132, the winding wire reciprocates between the 19 th slot and the 25 th slot and is wound from the radial outer side to the radial inner side of the stator core 1, the f-th layer from the 19 th slot to the 13 th slot is the eighth span 2133, in the eighth span 2133, the winding wire reciprocates between the 19 th slot and the 13 th slot and is wound from the radial inner side to the radial outer side of the stator core 1.

in the fourth winding portion 214, the 13 th slot f-th layer is a starting end of the fourth winding portion 214, the 8 th slot sub-outer layer is a terminating end of the fourth winding portion 214, the fourth winding portion 214 may include a ninth span 2141, a tenth span 2142, and an eleventh span 2143, the f-th layer is the ninth span 2141 from the 13 th slot f-th layer to the 8 th slot f-th layer, the a-th layer is the tenth span 2142 from the 8 th slot f-th layer to the 8 th slot a-th layer, in the tenth span 2142, the winding wire reciprocates between the 8 th slot and the 14 th slot and is wound from a radial outer side to a radial inner side of the stator core 1, the eleventh span 2143 is the eleventh span from the 8 th slot a-th layer to the 8 th slot sub-outer layer, and in the eleventh span 2143, the winding wire reciprocates between the 8 th slot and the 2 nd slot and is wound from the radial inner side to the radial outer side of the stator core 1.

Wherein, the 1 st groove is an initial groove, and the 1 st groove is connected with the f-th layer of the first outgoing line 3; the end slots, between which there are 6 stator slots 11, are connected with the initial slots, the outermost layer of which connects the first star point line 4.

the second routing wire 22 of each phase of the stator winding 2 may include: a fifth winding part 221, a sixth winding part 222, a seventh winding part 223, and an eighth winding part 224, the fifth winding part 221, the sixth winding part 222, the seventh winding part 223, and the eighth winding part 224 are connected in sequence, in the fifth winding portion 221, the 2 nd slot f-th layer is the starting end of the fifth winding portion 221, the 38 th slot f-th layer is the terminating end of the fifth winding portion 221, the fifth winding portion 221 may include a twelfth span 2211 and a thirteenth span 2212, the a-th layer is the twelfth span 2211 from the 2 nd slot f-th layer to the 44 th slot a, in the twelfth jump 2211, the winding wire reciprocates between the 2 nd slot and the 44 th slot and is wound from the radial outside to the radial inside of the stator core 1, the a-th layer from the 44 th slot to the 38 th slot is the thirteenth jump 2212, in the thirteenth step 2212, the winding wire reciprocates between the 44 th slot and the 38 th slot and is wound from the radially inner side to the radially outer side of the stator core 1.

In the sixth winding portion 222, the 38 th slot f-th layer is a start end of the sixth winding portion 222, the 25 th slot f-th layer is a termination end of the sixth winding portion 222, and the sixth winding portion 222 may include a fourteenth span 2221, a fifteenth span 2222, and a sixteenth span 2223, the f-th layer is a fourteenth span 2221 from the 38 th slot f-th layer to the 31 th slot f-th layer, the a-th layer is a fifteenth span 2222 from the 31 th slot f-th layer to the 31 th slot a-th layer, in the fifteenth span 2222, the winding wire reciprocates between the 31 th slot and the 37 th slot and is wound from a radial outer side to a radial inner side of the stator core 1, the f-th layer is a sixteenth span 2223 from the 31 th slot a-th layer to the 25 th slot f-th layer, and in the sixteenth span 2223, the winding wire reciprocates between the 31 th slot and the 25 th slot and is wound from the radial inner side to the radial outer side of the stator core 1.

In the seventh winding portion 223, the 25 th slot f-th layer is a starting end of the seventh winding portion 223, the 14 th slot f-th layer is a terminating end of the seventh winding portion 223, the seventh winding portion 223 may include seventeenth, eighteenth and nineteenth spans 2231, the f-th layer is a seventeenth span 2231 from the 25 th slot f-th layer to the 20 th slot f-th layer, the a-th layer is an eighteenth span 2232 from the 20 th slot f-th layer to the 20 th slot a-th layer, in the eighteenth span 2232, the winding wire reciprocates between the 20 th and 26 th slots and is wound from a radially outer side to a radially inner side of the stator core 1, the f-th layer is a nineteenth span 2233 from the 20 th slot a-th layer to the 14 th slot f-th layer, and in the nineteenth span 2233, the winding wire reciprocates between the 20 th slot and the 14 th slot and is wound from the radially inner side to the radially outer side of the stator core 1.

In the eighth winding portion 224, the 14 th slot f-th layer is a starting end of the eighth winding portion 224, the 7 th slot sub-outer layer is a terminating end of the eighth winding portion 224, the eighth winding portion 224 may include a twentieth span 2241, a twenty-first span 2242 and a twenty-second span 2243, the f-th layer from the 14 th slot to the 7 th slot f-th layer is a twentieth span 2241, the f-th layer from the 7 th slot to the 7 th slot a-th layer is a twenty-first span 2242, in the twenty-first span 2242, the winding wire reciprocates between the 7 th slot and the 13 th slot and is wound from a radially outer side to a radially inner side of the stator core 1, the a-th layer from the 7 th slot to the 7 th slot e-th layer is a twenty-second span 2243, and in the twenty-second span 2243, the winding wire reciprocates between the 7 th slot and the 1 st slot and is wound from the radially inner side to the radially outer side of the stator core 1.

The 2 nd groove is an initial groove, the 2 nd groove is connected with the second outgoing line 5 in the f-th layer, the termination groove is provided with 4 stator grooves 11, and the outermost layer of the termination groove is connected with the second star point line 6.

In some embodiments, the connection is made from layer a to layer a through the first type conductor segment 241 in the second type conductor segment 24 shown in fig. 12, from layer d to layer e through the second type conductor segment 242 in the second type conductor segment 24 shown in fig. 13, from layer b to layer c through the third type conductor segment 243 in the second type conductor segment 24 shown in fig. 14, with a span of 6 from layer f to layer f through the fourth type conductor segment 244 in the second type conductor segment 24 shown in fig. 15, with a span of 5 through the first type conductor segment 23 shown in fig. 16, and with a span of 7 through the third type conductor segment 25 shown in fig. 17. Layers a to b, c to d, and e to f are connected by non-closed end welding of the conductor segment.

as shown in fig. 18 to 20, a1, B1, and C1 are lead lines of the first winding 21, X1, Y1, and Z1 are star points of the first winding 21, a2, B2, and C2 are lead lines of the second winding 24, X2, Y2, and Z2 are star points of the second winding 24, and a to f respectively represent the 1 st to 6 th layers (the 1 st layer is located near the notch, and the 6 th layer is located at the bottom of the slot) of the same stator slot 11.

as shown in fig. 18 to 20, the end of the bent portion 231 of the conductor segment is a hairpin end of the stator winding 2, and the ends of the first in-slot portion 233 and the second in-slot portion 234 are called a welding end 232 of the stator winding 2, and the welding end 232 is formed by sequentially welding the first in-slot portion 233 of the plurality of U-shaped conductor segments and the second in-slot portion 234 of the conductor segment adjacent thereto.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The stator assembly is suitable for a z-slot 2 p-pole m-phase motor, the number of slots of each pole of the motor is q, z/m/(2p), the number of parallel branches is a, and a is not more than q, the stator assembly comprises a stator core and a stator winding, the stator core is provided with a plurality of stator slots, the stator slots are distributed along the circumferential direction of the stator core, in the circumferential direction of the stator core, the stator slots are respectively a1 st slot, a2 nd slot, …, an ith slot, …, an nth slot and …, each stator slot is provided with r slot layers, and the r slot layers are respectively an a-th layer, a b-th layer, a …, a j-th layer, a … and an r-th layer from the radial inner side to the outer side of the stator core;

The first winding of each phase of the stator winding comprises a first winding part, a second winding part, a third winding part and a fourth winding part which are sequentially connected end to end, in the first winding part, the ith slot, the ith layer and the (i-12) th layer are the starting ends of the first winding part, the (i-12) th slot, the ith layer and the (i-12) th layer are the termination ends of the first winding part, the first winding part comprises a first span section and a second span section, the first span section is from the ith slot, the ith layer to the (i-6) th slot, the ith layer is the first span section, in the first span section, the winding reciprocates between the ith slot and the (i-6) th slot and is wound from the radial outer side to the radial inner side of the stator core; the second step from the (i-6) th slot a-th layer to the (i-12) th slot r-th layer, in which the winding wire reciprocates between the (i-6) th slot and the (i-12) th slot and is wound from the radially inner side to the radially outer side of the stator core;

Within the second winding portion, the (i-12) th slot (r) th layer is a starting end of the second winding portion, the (i-23) th slot (r) th layer is a terminating end of the second winding portion, the second winding portion includes a third span, a fourth span and a fifth span, the r layer from the (i-12) th slot to the (i-17) th slot is a third span; the (i-17) th slot, the (a) th slot, and the (i-17) th slot are the fourth spanning section, and in the fourth spanning section, the winding wire reciprocates between the (i-17) th slot and the (i-11) th slot and is wound from the radial outer side to the radial inner side of the stator core; the (i-17) th slot (a) th layer to the (i-23) th slot (r) th layer is the fifth span in which the winding reciprocates between the (i-17) th slot and the (i-23) th slot and the winding is wound from the radially inner side to the radially outer side of the stator core;

Within the third winding portion, the (i-23) th slot nth layer is a starting end of the third winding portion, the (i-36) th slot nth layer is a terminating end of the third winding portion, the third winding portion comprises a sixth span, a seventh span and an eighth span, and the sixth span is from the (i-23) th slot nth layer to the (i-30) th slot nth layer; the (i-30) th slot, the (a-30) th slot, and the seventh jump section in which the winding wire reciprocates between the (i-30) th slot and the (i-24) th slot and is wound from the radially outer side to the radially inner side of the stator core; an (i-30) th slot (a) th layer to an (i-36) th slot (r) th layer is the eighth span within which a winding reciprocates between the (i-30) th slot and the (i-36) th slot and the winding is wound from a radially inner side to a radially outer side of the stator core;

within the fourth winding portion, the (i-36) th slot th layer is the starting end of the fourth winding portion, the (i-41) th slot next-to-outer layer is the terminating end of the fourth winding portion, the fourth winding portion comprises a ninth span, a tenth span and an eleventh span, and the (i-36) th slot th layer to the (i-41) th slot th layer is the ninth span; the tenth jump from the (i-41) th slot layer to the (i-41) th slot layer a, in which a winding reciprocates between the (i-41) th slot and the (i-35) th slot and the winding is wound from a radially outer side to a radially inner side of the stator core; from the (i-41) th slot a-th layer to the (i-41) th slot sub-outer layer is the eleventh jump section in which the winding wire reciprocates between the (i-41) th slot and the (i-47) th slot and the winding wire is wound from the radially inner side to the radially outer side of the stator core,

The ith groove is an initial groove, and the ith groove is connected with the first outgoing line through the ith layer; a termination slot, there being 6 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting a first star point line;

each phase of the second winding of the stator winding comprises a fifth winding part, a sixth winding part, a seventh winding part and an eighth winding part which are sequentially connected end to end, wherein in the fifth winding part, the (n-47) th layer of the slot is the starting end of the fifth winding part, the (n-11) th layer of the slot is the termination end of the fifth winding part, the fifth winding part comprises a twelfth span and a thirteenth span, the layer from the (n-47) th layer of the slot to the (n-5) th layer of the slot is the twelfth span, and in the twelfth span, the winding is reciprocated between the (n-47) th slot and the (n-5) th slot and is wound from the radial outer side to the radial inner side of the stator core; the (n-5) th slot (a) th layer to the (n-11) th slot (r) th layer is the thirteenth jump section in which the winding wire reciprocates between the (n-5) th slot and the (n-11) th slot and the winding wire is wound from the radially inner side to the radially outer side of the stator core;

Within the sixth winding portion, the (n-11) th slot nth layer is a starting end of the sixth winding portion, the (n-24) th slot nth layer is a terminating end of the sixth winding portion, the sixth winding portion includes a fourteenth span, a fifteenth span and a sixteenth span, the fourteenth span is from the (n-11) th slot nth layer to the (n-18) th slot nth layer; the (n-18) th slot, the (r) th slot, to the (n-18) th slot, the a-th layer being the fifteenth jump within which the winding reciprocates between the (n-18) th slot and the (n-12) th slot and the winding from the radially outer side to the radially inner side of the stator core; the sixteenth jump from the (n-18) th slot (a) th layer to the (n-24) th slot (r) th layer, within which the winding reciprocates between the (n-18) th slot and the (n-24) th slot and the winding is wound from the radially inner side to the radially outer side of the stator core;

within the seventh winding portion, the (n-24) th slot nth layer is a starting end of the seventh winding portion, the (n-35) th slot nth layer is a terminating end of the seventh winding portion, the seventh winding portion includes a seventeenth span, an eighteenth span and a nineteenth span, the seventeenth span is from the (n-24) th slot nth layer to the (n-29) th slot nth layer; the (n-29) th slot, the (r) th slot, to the (n-29) th slot, the a th layer being the eighteenth jump within which a winding reciprocates between the (n-29) th slot and the (n-23) th slot and the winding is wound from a radially outer side to a radially inner side of the stator core; the (n-29) th slot a-th layer to the (n-35) th slot r-th layer are the nineteenth spans in which windings reciprocate between the (n-29) th slot and the (n-35) th slot and from the radially inner side to the radially outer side of the stator core;

Within the eighth winding portion, the (n-35) th slot nth layer is a starting end of the eighth winding portion, the (n-42) th slot next-to-outer layer is a terminating end of the eighth winding portion, the eighth winding portion includes a twentieth span, a twenty-first span, and a twenty-second span, the twentieth span being from the (n-35) th slot nth layer to the (n-42) th slot nth layer; the twenty-first step from the (n-42) th slot (r) th layer to the (n-42) th slot (a) th layer is the twenty-first step in which a winding wire reciprocates between the (n-42) th slot and the (n-36) th slot and the winding wire is wound from a radially outer side to a radially inner side of the stator core; the (n-42) th slot a-th layer to the (n-42) th slot sub-outer layer are the twenty-second spans in which windings reciprocate between the (n-42) th slot and the nth slot and are wound from the radially inner side to the radially outer side of the stator core,

The nth-47 slot is an initial slot, and the nth-47 slot is connected with the second outgoing line through the nth layer; a termination slot, there being 4 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting the second dotted line.

2. the stator assembly of claim 1 wherein n ═ i.

3. The stator assembly according to claim 1, wherein the stator winding comprises a plurality of conductor segments, each of the conductor segments comprising a bend and first and second in-slot portions connected to the bend, respectively, the first and second in-slot portions of the plurality of conductor segments located at adjacent layers being welded together at the weld end.

4. the stator assembly according to claim 3, characterized in that the conductor segments comprise a first type of conductor segments, a second type of conductor segments and a third type of conductor segments, the pitch between the first in-slot portions and the second in-slot portions of the first type of conductor segments being (y-1) stator slots, the pitch between the first in-slot portions and the second in-slot portions of the second type of conductor segments being y stator slots, the pitch between the first in-slot portions and the second in-slot portions of the third type of conductor segments being (y +1) stator slots, wherein y is an integer and y is z/2 p.

5. The stator assembly according to claim 4, wherein the first conductor segments are located at the third, ninth, and seventeenth spans, the first in-slot portions of the first conductor segments being located at an outermost layer of one stator slot, and the second in-slot portions of the first conductor segments being located at an outermost layer of another stator slot.

6. the stator assembly of claim 4, wherein the second type of conductor segment is located at a first span, a second span, a fourth span, a fifth span, a seventh span, an eighth span, a tenth span, an eleventh span, a twelfth span, a thirteenth span, a fifteenth span, a sixteenth span, an eighteenth span, a nineteenth span, a twenty-first span, a twenty-second span;

The second type of conductor segment comprises conductor segments of the same layer and conductor segments of different layers, wherein the first in-slot part of the conductor segment of the same layer is positioned in the first in-slot part and positioned on the outermost layer of one stator slot, and the second in-slot part is positioned on the outermost layer of the other stator slot, or the first in-slot part of the conductor segment of the same layer is positioned in the first in-slot part and positioned on the innermost layer of one stator slot, and the second in-slot part is positioned on the innermost layer of the other stator slot; the first in-slot part of the conductor segment of the different layer is positioned in the middle slot layer of one stator slot, the second in-slot part is positioned in the middle slot layer of the other stator slot, and the different layer strides.

7. the stator assembly according to claim 4, characterized in that the conductor segments of the third type are located at a sixth span, a fourteenth span, a twentieth span, the first in-slot portions of the conductor segments of the third type being located at the outermost layer of one stator slot and the second in-slot portions of the conductor segments of the third type being located at the outermost layer of another stator slot.

8. an electrical machine comprising a stator assembly according to any of claims 1-7.

9. the stator assembly is suitable for a z-slot 2 p-level m-phase motor, the number of slots of each pole of each phase is q, z/m/(2p), the number of parallel branches is a, a is less than or equal to q, the stator assembly comprises a stator core and a stator winding, the stator core is provided with a plurality of stator slots, the stator slots are distributed along the circumferential direction of the stator core, in the anticlockwise direction of the circumferential direction of the stator core, the stator slots are respectively a1 st slot, a2 nd slot, …, an ith slot, …, an nth slot and …, each stator slot is provided with 6 slot layers, and the 6 slot layers are respectively an a layer, a b layer, … and an f layer from the radial inner side to the outer side of the stator core;

The first winding of each phase of the stator winding comprises a first winding part, a second winding part, a third winding part and a fourth winding part which are sequentially connected end to end, in the first winding part, the 1 st slot f layer is the starting end of the first winding part, the 37 th slot f layer is the terminating end of the first winding part, the first winding part comprises a first span section and a second span section, the (a) th layer from the 1 st slot f layer to the 43 th slot is the first span section, in the first span section, the winding reciprocates between the 1 st slot and the 43 th slot and is wound from the radial outer side to the radial inner side of the stator core; the second step is from the 43 rd slot a layer to the 37 th slot f layer, and in the second step, the winding is reciprocated between the 43 th slot and the 37 th slot and is wound from the radial inner side to the radial outer side of the stator core;

In the second winding part, the 37 th slot fth layer is the starting end of the second winding part, the 26 th slot fth layer is the terminating end of the second winding part, the second winding part comprises a third span section, a fourth span section and a fifth span section, and the fth layer from the 37 th slot fth layer to the 32 th slot fth layer is the third span section; the fourth step is from the 32 th slot (f) th layer to the 32 nd slot (a) th layer, and in the fourth step, the winding wire reciprocates between the 32 th slot and the 38 th slot and is wound from the radial outer side to the radial inner side of the stator core; the layer a from the 32 th slot to the 26 th slot is the fifth span, and the winding wire reciprocates between the 32 th slot and the 26 th slot and is wound from the radial inner side to the radial outer side of the stator core in the fifth span;

In the third winding part, the 26 th slot f-th layer is the starting end of the third winding part, the 13 th slot f-th layer is the terminating end of the third winding part, the third winding part comprises a sixth span section, a seventh span section and an eighth span section, and the f-th layer from the 26 th slot f-th layer to the 19 th slot f-th layer is a sixth span section; the seventh jump from the 19 th slot (f) th layer to the 19 th slot (a) th layer, in which the winding wire reciprocates between the 19 th slot and the 25 th slot and is wound from the radially outer side to the radially inner side of the stator core; the layer a from the 19 th slot to the 13 th slot is the eighth span, and the winding reciprocates between the 19 th slot and the 13 th slot and is wound from the radial inner side to the radial outer side of the stator core in the eighth span;

In the fourth winding part, the 13 th slot f-th layer is the starting end of the fourth winding part, the 8 th slot sub-outer layer is the termination end of the fourth winding part, the fourth winding part comprises a ninth span section, a tenth span section and an eleventh span section, and the f-th layer from the 13 th slot f-th layer to the 8 th slot f-th layer is a ninth span section; the tenth step is from the 8 th slot (f) th layer to the 8 th slot (a) th layer, and in the tenth step, the winding wire reciprocates between the 8 th slot and the 14 th slot and is wound from the radially outer side to the radially inner side of the stator core; the eleventh step from the 8 th slot a layer to the 8 th slot sub-outer layer, in which the winding wire reciprocates between the 8 th slot and the 2 nd slot and is wound from the radially inner side to the radially outer side of the stator core,

The 1 st groove is an initial groove, and the 1 st groove is connected with the f-th layer of the first outgoing line; a termination slot, there being 6 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting a first star point line;

Each phase of second winding of the stator winding comprises a fifth winding part, a sixth winding part, a seventh winding part and an eighth winding part, and the fifth winding part, the sixth winding part, the seventh winding part and the eighth winding part are connected in sequence; in the fifth winding portion, the 2 nd slot f-th layer is a starting end of the fifth winding portion, the 38 th slot f-th layer is a terminating end of the fifth winding portion, the fifth winding portion includes a twelfth span and a thirteenth span, the a-th layer is the twelfth span from the 2 nd slot f-th layer to the 44 th slot, and in the twelfth span, a winding wire is wound back and forth between the 2 nd slot and the 44 th slot and is wound from a radially outer side to a radially inner side of the stator core; the layer f from the 44 th slot to the 38 th slot is the thirteenth jump section in which the winding wire reciprocates between the 44 th slot and the 38 th slot and is wound from the radially inner side to the radially outer side of the stator core,

In the sixth winding part, the 38 th slot f-th layer is the starting end of the sixth winding part, the 25 th slot f-th layer is the terminating end of the sixth winding part, the sixth winding part comprises a fourteenth span section, a fifteenth span section and a sixteenth span section, and the f-th layer from the 38 th slot f-th layer to the 31 th slot f-th section is a fourteenth span section; the fifteenth step is a layer from the 31 st slot (f) th layer to the 31 st slot (a), and in the fifteenth step, the winding wire reciprocates between the 31 st slot and the 37 th slot and is wound from the radially outer side to the radially inner side of the stator core; the sixteenth step from the 31 st slot, the a th layer to the 25 th slot, in which the winding wire reciprocates between the 31 st slot and the 25 th slot and is wound from the radially inner side to the radially outer side of the stator core;

in the seventh winding part, the 25 th slot f-th layer is the starting end of the seventh winding part, the 14 th slot f-th layer is the terminating end of the seventh winding part, the seventh winding part comprises a seventeenth span, an eighteenth span and a nineteenth span, and the f-th layer from the 25 th slot f-th layer to the 20 th slot f-th layer is a seventeenth span; the layer a from the 20 th slot f to the 20 th slot is the eighteenth jump in which the winding reciprocates between the 20 th slot and the 26 th slot and is wound from the radially outer side to the radially inner side of the stator core; the nineteenth step is the f-th step from the 20 th slot a-th layer to the 14 th slot, and in the nineteenth step, the winding wire reciprocates between the 20 th slot and the 14 th slot and is wound from the radially inner side to the radially outer side of the stator core;

In the eighth winding part, the 14 th slot f-th layer is the starting end of the eighth winding part, the 7 th slot sub-outer layer is the terminating end of the eighth winding part, the eighth winding part comprises a twentieth span, a twenty-first span and a twenty-second span, and the twentieth span is from the 14 th slot f-th layer to the 7 th slot f-th layer; the twenty-first step from the 7 th slot (fth) to the 7 th slot (a) is a winding reciprocating between the 7 th slot and the 13 th slot and from the radially outer side to the radially inner side of the stator core within the twenty-first step; the twenty-second step from the 7 th slot a-th layer to the 7 th slot e-th layer, in which the winding wire reciprocates between the 7 th slot and the 1 st slot and is wound from the radially inner side to the radially outer side of the stator core,

The 2 nd groove is an initial groove, and the 2 nd groove is connected with the second outgoing line through the f-th layer; a termination slot, there being 4 stator slots between the termination slot and the initial slot, the outermost layer of the termination slot connecting the second dotted line.