CN213990307U

CN213990307U - Motor stator and motor

Info

Publication number: CN213990307U
Application number: CN202023204607.1U
Authority: CN
Inventors: 魏建勋
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Borgwarner Powertrain Tianjin Co ltd
Priority date: 2020-12-26
Filing date: 2020-12-26
Publication date: 2021-08-17
Anticipated expiration: 2030-12-26

Abstract

The utility model relates to the field of motors, and discloses a motor stator and a motor, which comprises a stator core, a stator core and a motor core, wherein the stator core is provided with a plurality of grooves which are formed on the radial inner surface of the stator core and are spaced at preset groove intervals along the circumferential direction of the stator core; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; wherein, two at least branch winding along stator core circumference in every phase winding are connected in parallel in proper order, and stator winding includes: the first coil group and the third coil group are sequentially sleeved along the radial direction of the stator iron core; the utility model discloses a winding structure has adopted complete symmetrical structure on magnetic circuit, has eliminated because the circulation current problem that asymmetrical structure produced adopts less U-shaped conductor, simplifies manufacturing procedure, has reduced manufacturing cost, improves machining efficiency.

Description

Motor stator and motor

Technical Field

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

Background

In the prior art, a stator winding comprises various conductors, the various conductors comprise U-shaped conductors and S-shaped conductors, and coils of the various conductors penetrate into a slot of a stator core according to a certain arrangement mode to form a required single-phase winding or multi-phase winding of a motor. The hairpin coils used in the prior art are various, the manufacturing process is complex, the production cost is high, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and motor has adopted complete symmetrical structure on magnetic circuit through the winding structure, has eliminated because the circulation current problem that asymmetrical structure produced adopts the U-shaped conductor, simplifies manufacturing procedure, has reduced manufacturing cost, improves machining efficiency.

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

an electric machine stator comprising:

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

a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase;

at least two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core and form M layers in the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3;

the stator winding includes: the first coil group and the third coil group are sequentially sleeved along the radial direction of the stator iron core;

each coil group comprises a plurality of conductors, each conductor comprises two slot interiors for being inserted into different slots and two welding ends which are positioned outside the stator core slots and are connected with the two slot interiors at the other ends;

the pitch of a plurality of conductors of the first coil group is equal to the pole pitch of the stator winding, and the two grooves of the plurality of conductors in the first coil group are positioned on the same layer;

the pitch of the plurality of conductors of the third coil group is equal to the pole pitch of the stator winding, or the pitch of a part of the plurality of conductors of the third coil group is larger than the pole pitch, and the pitch of the other conductors in the third coil group is smaller than the pole pitch.

Furthermore, the first welding end of the third coil group in each branch winding extends along the circumferential direction of the stator core at a different slot pitch than the other welding ends of the third coil group in the branch winding, and the first welding ends of the two branch windings in each phase winding extend along the circumferential direction of the stator core at different slot pitches; except that the slot pitch of each branch winding of each phase winding, which is positioned at the first welding end of the third coil group and extends along the circumferential direction of the stator core, is different from the slot pitch of each branch winding, which is positioned at the other welding ends of the third coil group and extends along the circumferential direction of the stator core, the welding ends of the branch windings, which are positioned at the same radial layer of the stator core, are the same in the extending direction along the circumferential direction of the stator core, and the welding ends of the branch windings, which are positioned at two radial adjacent layers of the stator core, are opposite in the extending direction along the circumferential direction of the stator core.

Furthermore, except that the welding ends of the part of the third coil group, which is far away from the connection inside the slot of the other coil group, extend from the layer in the slot to the side far away from the other coil group, the welding ends of the connection inside the slot of the third coil group and the welding ends of the connection inside the slot of the other coil group are connected with the corresponding slot inside in the same layer.

Furthermore, the motor also comprises N second coil groups positioned between the first coil group and the third coil group, wherein the pitch of a plurality of conductors of the second coil group is equal to the pole pitch of the stator winding, and N is an integer which is greater than or equal to 1.

The pitch of a part of conductors in the plurality of conductors of the second coil group is larger than the polar distance, and the pitch of the other part of conductors is smaller than the polar distance, wherein N is an integer larger than or equal to 1.

Furthermore, two slot interiors of each conductor in the second coil group are located in two radially adjacent layers of the stator core, and two slot interiors of each conductor in the third coil group are located in two radially adjacent layers of the stator core.

In order to achieve the above object, the present invention also provides a motor including the above motor stator.

By applying the technical scheme of the utility model, the stator core of the motor comprises a plurality of grooves which are formed on the radial inner surface of the stator core and are spaced at a preset groove distance along the circumferential direction of the stator core; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; at least two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core and form M layers in the radial direction of the stator core, wherein M is an odd number larger than equal to 3; the stator winding includes: the first coil group and the third coil group are sequentially sleeved along the radial direction of the stator iron core; each coil group comprises a plurality of conductors, each conductor comprises two slot interiors for being inserted into different slots and two welding ends which are positioned outside the stator core slots and are connected with the two slot interiors at the other ends; the pitch of a plurality of conductors of the first coil group is equal to the pole pitch of the stator winding, and the two grooves of the plurality of conductors in the first coil group are positioned on the same layer; the pitch of the plurality of conductors of the third coil group is equal to the pole pitch of the stator winding, or the pitch of a part of the plurality of conductors of the third coil group is larger than the pole pitch, and the pitch of the other conductors in the third coil group is smaller than the pole pitch. The winding structure adopts a completely symmetrical structure on a magnetic circuit, eliminates the problem of circulating current generated by an asymmetrical structure, adopts a U-shaped conductor, simplifies the manufacturing process, reduces the production cost and improves the processing efficiency.

Drawings

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

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

fig. 3 is a schematic structural diagram of a first coil assembly according to a first embodiment of the present invention;

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

fig. 5 is a schematic structural diagram of a second coil assembly according to a first embodiment of the present invention;

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

fig. 7 is a schematic structural diagram of a third coil assembly in the first embodiment of the present invention;

fig. 8 is a schematic diagram of a second conductor forming a third coil assembly according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a fourth conductor forming a third coil set according to an embodiment of the present invention;

FIG. 10 is a partial schematic view of two adjacent grooves according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a third coil assembly in the second embodiment of the present invention;

fig. 12 is a schematic diagram of a second conductor forming a third coil assembly in accordance with an embodiment of the present invention;

fig. 13 is a schematic diagram of a fourth conductor forming a third coil set according to an embodiment of the present invention;

fig. 14 is a partial structure diagram of two same-phase adjacent slots according to the embodiment of the present invention;

fig. 15 is a planar development view of a phase stator winding according to a first embodiment of the present invention;

fig. 16 is a planar development view of a stator winding of one phase according to the second embodiment of the present invention;

fig. 17 is a schematic structural diagram of a second coil assembly in the third embodiment of the present invention;

fig. 18 is a schematic structural diagram of a second conductor in a second coil group formed according to a third embodiment of the present invention;

fig. 19 is a partial structure diagram of two adjacent slots in three same phases according to an embodiment of the present invention;

fig. 20 is a planar development view of a stator winding of one phase in the third embodiment of the present invention;

fig. 21 is a planar development view of a stator winding of one phase in the fourth embodiment of the present invention;

fig. 22 is a schematic diagram of an electrical connection in an embodiment of the invention;

fig. 23 is another electrical connection schematic in an embodiment of the invention;

Detailed Description

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

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not intended to limit a specific order. The embodiments of the present invention can be implemented individually, and can be implemented by combining each other between the embodiments, and the embodiments of the present invention are not limited to this.

In the present application, the slot pitch is the interval between two slot inner portions 301 of the conductor along the circumferential direction, and the pitch is the interval between the two slot inner portions 301 of the conductor along the circumferential direction; note that the extension direction of the plug end in the stator core circumferential direction in the present application is the extension direction in the stator core circumferential direction from the first slot interior 301 of the conductor to the second slot interior 301 of the conductor.

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

with reference to fig. 1 to 2, 15 to 16, 20 to 21, in the stator winding 10 in the present embodiment, the stator winding 10 is mounted on the stator core 20, that is, a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, wherein the stator winding 10 is a three-phase (i.e., U-phase, V-phase, W-phase) winding, and each pole has 2 or more slots per phase; two slots 21 are provided for each magnetic pole of the rotor, the number of slots per pole per phase is 2 in the present embodiment, the rotor has eight magnetic poles and is such that the number of slots 21 per pole per phase is equal to 48 (i.e., 2X8X3) in the stator core 20, as shown in fig. 15, 16, 20, and 21, the U1 and U2 windings in the U-phase windings are sequentially connected in parallel in the circumferential direction of the stator core, the V1 and V2 windings in the V-phase windings are sequentially connected in parallel in the circumferential direction of the stator core, the W1 and W2 windings in the W-phase windings are sequentially connected in parallel in the circumferential direction of the stator core, and M layers are formed in the radial direction of the stator core 20, and the phase windings (U-phase windings or V-phase windings or W-phase windings) in the present embodiment form M layers in the radial direction of the stator core; the above-mentioned M odd number layer may be three, five, seven or more layers. Further, in the present embodiment, the stator core 20 is defined by two adjacent slots 21, one tooth 22, and the stator core 20 is formed by laminating a plurality of annular magnetic steel plates, into which a plurality of insulating papers are inserted, at both end faces in the axial direction of the stator core, and it should be noted that other conventional metal plates may be used instead of the magnetic steel plates.

As shown in fig. 1, fig. 2, fig. 15, fig. 16, fig. 21, and fig. 22, the motor stator further includes a stator winding 10, which includes a first coil group 110 and a third coil group 130 that are sequentially sleeved and distributed along a radial direction of the stator core 20, each coil group includes a plurality of conductors, each conductor includes two slot interiors 301 for being inserted into different slots and two welding ends 303 located outside the slots of the stator core 20 and connected with the two slot interiors 301;

as shown in fig. 2, 3, 4, 15, 16, 21 and 22, in the present embodiment, the first coil group 110 is located at the inner side of the stator core in the radial direction, i.e., in the direction close to the central axis of the stator core, in the present embodiment, the first coil group 110 is located at the inner side of the stator core in the radial direction, and the third coil group 130 is located at the outer side of the stator core in the radial direction, i.e., in the direction away from the central axis of the stator core; correspondingly, each coil group in the stator winding 10 may also be sequentially sleeved with the first coil group 110 along the radial outer side of the stator core 20, i.e. in the direction away from the central axis of the stator core, and the third coil group 130 is located at the radial inner side of the stator core, i.e. in the direction close to the central axis of the stator core;

exemplarily, as shown in fig. 2, 3, and 4, in the present embodiment, the first coil group 110 includes 24 conductors, each of which includes: the stator core slot comprises a welding end 303, a slot interior 301, a plug wire end 302, a slot interior 301 and a welding end 303 which are sequentially connected, wherein the two slot interiors 301 are positioned in two slots which are separated by a specified slot distance in the same layer (the first layer close to the central axis direction in the embodiment) of the stator core, one end of the stator core slot exterior is connected with the plug wire end of the two slot interiors 301, and the other end of the stator core slot exterior is connected with the welding end 303 in the same layer (the first layer close to the central axis direction in the embodiment); the pitch between the two slot interiors of the 24 conductors 210 of the first coil group 110 is Y, which in this embodiment is a full pitch of 6, i.e. equal to the stator winding pitch.

With reference to fig. 7 to 9, in the first embodiment and the third embodiment, the third coil group 130 includes 48 conductors, and each conductor of the third coil group includes: the stator core slot comprises a welding end 303, a slot interior 301, a plug wire end 302, a slot interior 301 and a welding end 303 which are sequentially connected, wherein the two slot interiors 301 are positioned in two slots of two radially adjacent layers (the M-1 st layer and the M th layer close to the central axis direction) of a stator core at a specified slot distance, one end outside the stator core slot is connected with the plug wire end of the two slot interiors 301, the M-1 st layer at the other end outside the stator core slot is connected with the welding end at the same layer, and the welding end at the same layer in the partial slot of the M layer is connected with the welding end at the same layer; the 48 conductors of the third coil group 130 are 24

second conductors

220 and 24 fifth conductors 225, the pitch between the two slot interiors of the second conductors 220 is Y, in this embodiment, Y is a full pitch of 6, and the pitch between the two slot interiors of the fifth conductors 225 is Y, in this embodiment, Y is a full pitch of 6, that is, equal to the stator winding pole pitch. The pole pitch is the number of phases of each winding multiplied by the number of magnetic poles of each group of phase conductors, the coil with the pitch larger than the pole pitch is a long-pitch coil, the coil group with the pitch equal to the pole pitch is a full-pitch coil group, and the coil with the pitch smaller than the pole pitch is a short-pitch coil; specifically, each winding includes 3 sets of phase conductors, the number of slots per pole per phase is 2, and then the pole pitch is 2 × 3 — 6, that is, the pole pitch of the stator winding 2 is six, the pitch of the first coil set 110 is six, and the pitch of the third coil set 130 is six. The winding structure adopts a completely symmetrical structure on a magnetic circuit, eliminates the problem of circulating current generated by an asymmetrical structure, simplifies the manufacturing process by adopting the U-shaped conductor, reduces the production cost and improves the processing efficiency.

With reference to fig. 11 to 13, in the second embodiment and the fourth embodiment, the third coil group 130 includes 48 conductors, each of which includes: the stator core slot comprises a welding end 303, a slot interior 301, a plug wire end 302, a slot interior 301 and a welding end 303 which are sequentially connected, wherein the two slot interiors 301 are positioned in two slots of two radially adjacent layers (the M-1 st layer and the M th layer close to the central axis direction) of a stator core at a specified slot distance, one end outside the stator core slot is connected with the plug wire end of the two slot interiors 301, the M-1 st layer at the other end outside the stator core slot is connected with the welding end at the same layer, and the welding end at the same layer in the partial slot of the M layer is connected with the welding end at the same layer; the 48 conductors of the third coil group 130 are 12 third conductor groups and 12 fourth conductor groups, the 12 third conductor groups include 12 third large conductors 230A and 12 third small conductors 230B, the pitch between the two slot interiors of the third large conductors 230A is Z, in this embodiment, Z is a long pitch of 7, the pitch between the two slot interiors of the third small conductors 230B is X, and in this embodiment, X is a short pitch of 5; the 12 fourth conductor groups include 12 fourth large conductors 235A and 12 fourth small conductors 235B, the pitch between the two slot interiors of the fourth large conductors 235A is Z, in this embodiment, Z is a long pitch of 7, the pitch between the two slot interiors of the fourth small conductors 235B is X, in this embodiment, X is a short pitch of 5, that is, the pitch of 12 third large conductors 230A and 12 fourth large conductors 235A of the 48 conductors in the third coil group is a long pitch larger than the pole pitch, and the pitch of the other 12 third small conductors 230B and 12 fourth small conductors 235B is a short pitch smaller than the pole pitch. With reference to fig. 11 and 12, two slot interiors 301 of one third large conductor 230A of the large conductors in the third coil group 130 are located in the M-1 st layer of the first slot and the M-th layer of the eighth slot of the stator core; the two slot inner parts 301 of the third small conductor 230B of one of the other small conductors in the third coil group 130 are positioned at the M-1 st layer of the second slot and the M-th layer of the seventh slot of the stator core; that is, third large conductor 230A and third small conductor 230B of third coil group 130 are located in adjacent slots of the stator core, and third large conductor 230A of third coil group 130 surrounds third small conductor 230B; correspondingly, with reference to fig. 11 and 13, the two slot interiors 301 of the fourth large conductor 235A of one of the large conductors in the third coil group 130 are located at the M-1 st layer and the M-th layer of the tenth slot in the third slot of the stator core; the two in-slot portions 301 of one fourth small conductor 235B among the other small conductors in the third coil group 130 are located in the M-1 th layer in the fourth slot of the stator core, and the M-th layer in the ninth slot, that is, the fourth large conductor 235A and the fourth small conductor 235B of the third coil group 130 are located in the adjacent slots of the stator core, and the fourth large conductor 235A of the third coil group 130 surrounds the fourth small conductor 235B. The pole pitch is the number of phases of each winding multiplied by the number of magnetic poles of each group of phase conductors, the coil with the pitch larger than the pole pitch is a long-pitch coil, the coil group with the pitch equal to the pole pitch is a full-pitch coil group, and the coil with the pitch smaller than the pole pitch is a short-pitch coil; specifically, each winding includes 3 sets of phase conductors, the number of slots per pole per phase is 2, and then the pole pitch is 2 × 3 — 6, that is, the pole pitch of the stator winding 2 is six, the pitch of the first coil set 110 is six, the pitch of the partial conductors in the third coil set 130 is a long pitch, and the pitch of the other conductors in the third coil set 130 is a short pitch. The winding structure adopts a completely symmetrical structure on a magnetic circuit, eliminates the problem of circulating current generated by an asymmetrical structure, simplifies the manufacturing process by adopting the U-shaped conductor, reduces the production cost and improves the processing efficiency.

In the first to fourth embodiments, in combination with fig. 6 to 14 and 20 to 21, each branch winding located in the third coil group 130 has a first welding end 150A (150B) having a slot pitch of 4 or 2 different from the slot pitch 3 (full pitch/2) of the remaining welding end portion of each branch winding located in the third coil group 130, the slot pitches of the first welding ends of the two branch windings of each phase winding (U-phase winding, V-phase winding, W-phase winding) in the third coil group 130 are different, the slot pitch of the first welding end 150A of the first branch winding is half (4) of the long pitch, the slot pitch of the first welding end 150B of the second branch winding is half (2) of the short pitch, further, the sum of the pitches spanned in the circumferential direction by the other welding end (3) welded to the first welding end 150A (4) of the first branch winding is the long pitch, where the slot pitch of the first welding end 150A extending in the circumferential direction is 4, the slot pitch of the first welding terminal 150A can be 4 through the busbar + welding terminal connection, and accordingly, the sum of the pitches spanned in the circumferential direction of the other welding terminal (3) welded to the first welding terminal 150B (2) of the second branch winding is a short pitch, where the slot pitch of the first welding terminal 150B is 2, and the slot pitch of the first welding terminal 150B can also be 2 through the busbar + welding terminal connection; except for the first welding ends 150A and 150B, the third coil group 130 is positioned on the radial M-1 th layer and the M-th layer (far away from the axial side of the center of the stator core) of the stator core, the conductor welding ends 303 positioned on the M-1 th layer of the stator core are positioned outside the stator core slots and have the same extending direction (all extending along the circumferential clockwise direction of the stator core) and the same slot pitch extending and crossing in the circumferential direction, all the conductor welding ends 303 positioned on the M-1 th layer of the stator core have the same extending direction (all extending along the circumferential anticlockwise direction of the stator core) and have the same slot pitch extending and crossing in the circumferential direction, all the conductor welding ends positioned outside the stator core slots and having the same extending direction (all extending along the circumferential clockwise direction of the stator core) and the same slot pitch extending and crossing in the circumferential direction, all are 3 groove pitches; namely, the extending directions of the welding ends of the M layer and the M +1 layer of the stator core are opposite; correspondingly, the third coil assembly 130 may also be located at the first layer radially inside the stator core, the second floor (be close to stator core central axis one side), the conductor welded end 303 that is located the radial second floor of stator core is located the stator core slot outer extending direction the same (all along stator core circumference anticlockwise extension) and the slot pitch that strides across in circumference extension is the same, be 3 slot pitches, the extending direction that the part welded end 303 that is located the conductor of the first floor of stator core is located the stator core slot outer is the same (all along stator core circumference clockwise extension) and the slot pitch that strides across in circumference extension is the same, be 3 slot pitches, the welded end that is located the other conductor of the first virtual zero floor of stator core is located the stator core slot outer extending direction the same (all along stator core circumference anticlockwise extension) and the span is the same in circumference extension, be 3 slot pitches, be the welded end extending direction that is located the first floor of stator core and the virtual zero floor opposite promptly.

Referring to fig. 15, 16, 20 and 21, in this embodiment, when the third coil group 130 is located at the fifth and fourth layers in the radial direction of the stator core, the third coil group 130 is located at the mth layer in the radial direction of the stator core (M is 5 in this embodiment) and is located far away from the other coil groups (the second coil group and the first coil group), the third coil group 130 is located at the weld end (M +1 layer is far away from the other coil groups) corresponding to the weld end connected to the imaginary M +1 layer inside the slot (part is 18 fifth conductors 225 in the third coil group 130 in this embodiment) connected to the inside of the slot of the mth layer in the radial direction of the stator core, wherein each phase of the third coil group 130 further includes 2 conductors connected to lead wires (the lead wires are the outlet terminals U3 and U4 or the lead terminals U1 and U2), and in this embodiment, the weld end connected to the imaginary M +1 layer inside the slot of the mth layer of the 2 lead wires, of course, the welding ends correspondingly connected in the slots of the M-th layer of the stator core in the 2 conductors connected with the lead-out wires can also be positioned in the M-th layer and directly connected with the lead-out wires (the lead-out ends U3 and U4 or the lead-out ends U1 and U2) along the same layer in the slots; the other welding ends in the third coil group 130, which are positioned in the groove interior 301 of the fifth layer in the radial direction of the stator core, are connected with the corresponding welding ends 303 in the same layer, the groove interior 301 in the third coil group 130, which is positioned in the groove interior of the fourth layer in the radial direction of the stator core, is connected with the corresponding welding ends 303 in the same layer, the groove interior 301 in the third layer in the radial direction of the stator core is connected with the corresponding welding ends 303 in the same layer, the groove interior 301 in the second layer in the radial direction of the stator core is connected with the corresponding welding ends 303 in the same layer, and the groove interior 301 in the first layer in the radial direction of the stator core in the first coil group 110 is connected with the corresponding welding ends 303 in the same layer; that is, the welding terminals 303 of the third coil group 130, which are connected to the inside of the slots 301 far away from the other coil groups, extend from the fifth layer where the slots 301 are located to the side far away from the other coil groups, and the welding terminals of the third coil group 130, which are connected to the inside of the slots 301 (i.e., the welding terminals of the fourth layer and the fifth layer of the stator core), and the welding terminals of the other coil groups (i.e., the first coil group and the second coil group), which are connected to the inside of the slots of the other coil groups, are all connected to the corresponding inside of the slots in the same layer. Correspondingly, when the third coil group 130 is located at the first and second layers in the radial direction of the stator core, the third coil group 130 is located at the first layer in the radial direction of the stator core and is located far away from the other coil groups (the second and first coil groups), the third coil group 130 is located at the welding end (part is 18 fifth conductors 225 in the third coil group 130 in this embodiment) of the corresponding connection third virtual zero layer in the slot interior of the first layer in the radial direction of the stator core, the welding end (zero layer is far away from the other coil groups) of the virtual zero layer is correspondingly connected in the slot interior, wherein each phase of the third coil group 130 further includes 2 conductors connected with the outgoing lines (the outgoing lines are the outgoing lines U3, U4 or the leading ends U1, U2), in this embodiment, the welding end correspondingly connected in the slot interior of the first layer of the stator core in the first layer of the 2 conductors connected with the outgoing lines is located in the virtual zero layer, and of course, the welding end correspondingly connected in the slot interior of the first layer of the 2 conductors connected with the stator core in the first layer may also be located in the first layer along the first layer in the slot interior of the first layer Directly connecting outgoing lines (outlet terminals U3 and U4 or lead terminals U1 and U2); the other welding ends in the third coil group 130, which are positioned in the slot interior 301 of the first layer in the radial direction of the stator core, are connected with the corresponding welding ends 303 in the same layer, the slot interior 301 in the second layer in the radial direction of the stator core in the third coil group 130 is connected with the corresponding welding ends 303 in the same layer, the slot interior 301 in the third layer in the radial direction of the stator core in the second coil group 120 is connected with the corresponding welding ends 303 in the same layer, the slot interior 301 in the fourth layer in the radial direction of the stator core in the second coil group 120 is connected with the corresponding welding ends 303 in the same layer, and the slot interior 301 in the fifth layer in the radial direction of the stator core in the first coil group 110 is connected with the corresponding welding ends 303 in the same layer; that is, the welding terminals 303 of the third coil group 130, which are connected to the inside 301 of the slot far from the other coil group, extend from the first layer where the inside 301 of the slot is located to the side far from the other coil group, and the welding terminals of the inside 301 of the slot of the third coil group 130 (i.e., the welding terminals of the first layer and the second layer of the stator core) and the welding terminals of the inside of the slot of the other coil group (i.e., the first coil group and the second coil group) are all connected to the corresponding inside of the slot in the same layer. It should be noted that the position of the lead wire in the present application is not fixed, that is, the welding terminal connected to the lead terminal may also be used to connect the welding terminal of the lead terminal, and accordingly, the welding terminal connected to the lead terminal may also be connected to the welding terminal of the lead terminal; the other weld ends (far away from or close to) connected in the outermost slots extend from one side of the axial direction of the center of the stator core, and a single weld end or N weld ends do not extend outwards and are indirectly connected through the bus bar (intermediate medium).

The first third large conductor 230A of the U phase of the third coil 130 is located in the first slot of the M-1 th layer and the forty-second slot of the M layer of the stator core, the first third small conductor 230B of the U phase is located in the forty-eight slot of the M-1 th layer and the forty-three slot of the M layer of the stator core, the first fourth large conductor 235A of the V phase is located in the third slot of the M-1 th layer and the forty-fourth slot of the M layer of the stator core, the first fourth small conductor 235B of the V phase is located in the second slot of the M-1 th layer and the forty-five slot of the M layer of the stator core, the first third large conductor 230A of the W phase is located in the fifth slot of the M-1 th layer and the forty-sixth slot of the M layer of the stator core, the first third small conductor 230B of the W phase is located in the fourth slot of the M-1 th layer and the seventeenth slot of the M layer of the stator core, M is odd, that is, the slot outer terminals 302 of two conductors adjacent to each other in the same phase in the third coil group 130 extend in the same direction.

With reference to fig. 8, 9, 15, 16, 20, and 21, in this embodiment, the 48 conductors of the third coil group 130 include 24 second conductors 220 and 24 fifth conductors 225, the first third conductor 220 of the U-phase of the third coil 130 is located in the forty-eight slot of the M-1 th layer and the forty-two slot of the M-layer of the stator core, the second third conductor 220 of the U-phase is located in the first slot of the M-1 th layer and the forty-three slot of the M-th layer of the stator core, the first fifth conductor 225 of the V-phase is located in the second slot of the M-1 th layer and the forty-fourth slot of the M-th layer of the stator core, the second fifth conductor 225 of the V-phase is located in the third slot of the M-1 th layer and the forty-fifth slot of the M-1 th layer of the stator core, the first third conductor 220 of the W-phase is located in the fourth slot of the M-1 th layer and the forty-sixth slot of the M-1 th layer of the stator core, and the first third conductor 220 of the W-phase is located in the fifth slot of the M-1 of the stator core, The M-th and forty-seventh slots, M being an odd number, are arranged in the third coil group 130, i.e., the slot outer terminals 302 of two conductors adjacent to each other in the same phase extend in the same direction.

Further, N second coil groups 120 may be provided, where N is greater than or equal to 1, that is, a plurality of second coil groups 120 may be provided between the first coil group 110 and the third coil group 130, and hereinafter, for example, M is 5, there is one second coil group 120. As shown in fig. 1 or 2, fig. 6 to 14, and fig. 20 to 21, each slot is divided into five layers, i.e., a first layer, a second layer, a third layer, a fourth layer, and a fifth layer, in a direction in the radial direction of the stator core 20 and away from the central axis thereof.

With reference to fig. 6, 15, 16, 20, and 21, in the first embodiment and the second embodiment, the second coil group 120 includes 24 third conductor groups 230 including 48 conductors, and each of the 24 third conductor groups 230 includes 24 third large conductors 230A (partial conductors) and 24 third small conductors 230B (other conductors), and each of the conductors includes: the stator core slot comprises a welding end 303, a slot interior 301, a plug wire end 302, a slot interior 301 and a welding end 303 which are sequentially connected, wherein the two slot interiors 301 are positioned in two slots of two adjacent layers of the stator core in the radial direction and are separated by a specified slot distance, one end of the stator core slot exterior is connected with the plug wire end of the two slot interiors 301, and the two slot interiors 301 of the other end of the stator core slot exterior are respectively connected with the welding end 303 in the same layer; with reference to fig. 5 and 6, the pitch between the two groove interiors of the third large conductor 230A is Z, which is a long pitch of 7 in this embodiment, and the pitch between the two groove interiors of the third small conductor 230B is X, which is a short pitch of 5 in this embodiment; the two slot interiors 301 of the third large conductor 230A in the second coil group 120 are positioned at the second layer of the first slot and the third layer of the eighth slot of the stator core; the two slot interiors 301 of the third small conductors 230B in the second coil group 120 are positioned at the second layer of the second slot and the third layer of the seventh slot of the stator core; that is, the third large conductor 230A and the third small conductor 230B of the second coil group 120 are located in the adjacent slots of the stator core, and the third large conductor 230A of the second coil group 120 surrounds the third small conductor 230B; 24 third conductor groups 230 of the second coil group 120, wherein the first third large conductor 230A of the U-phase is located in the first slot of the second layer of the stator core and the forty-second slot of the third layer, the first third small conductor 230B of the U-phase is located in the forty-eighth slot of the second layer of the stator core and the forty-third slot of the third layer, the first third large conductor 230A of the V-phase is located in the third slot of the second layer of the stator core and the forty-fourth slot of the third layer, the first third small conductor 230B of the V-phase is located in the second slot of the second layer of the stator core and the forty-fifth slot of the third layer, the first third large conductor 230A of the W-phase is located in the fifth slot of the second layer of the stator core and the forty-sixth slot of the third layer, and the first third small conductor 230B of the W-phase is located in the fourth slot of the second layer of the stator core and the forty-seventh slot of the third layer; that is, the extension directions of the insertion ends 302 of two conductors adjacent to each other in the second coil group 120 are the same.

Optionally, with reference to fig. 17, 18, 15, 16, 20, and 21, in the third embodiment and the fourth embodiment, the second coil group 120 includes 48 conductors, and each conductor includes: the stator core slot comprises a welding end 303, a slot interior 301, a plug wire end 302, a slot interior 301 and a welding end 303 which are sequentially connected, wherein the two slot interiors 301 are positioned in two slots of two adjacent layers of the stator core in the radial direction and are separated by a specified slot distance, one end of the stator core slot exterior is connected with the plug wire end of the two slot interiors 301, and the two slot interiors 301 of the other end of the stator core slot exterior are respectively connected with the welding end 303 in the same layer; with reference to fig. 17 and 18, the pitch between the two slot interiors of each of the 48 conductors 220 of the second coil group 120 is Y, and in this embodiment, Y is 6, i.e., equal to the pole pitch. 48 conductors (24 third conductor groups 230) in the second coil group 120 are located in 48 in-slot second layer and third layer of the stator core, the extending directions of the conductor welding ends located at the second layer of the stator core outside the stator core slot are the same (all clockwise along the circumferential direction of the stator core) and the slot distances spanned by circumferential extension are the same, and are all 3 slot distances, the extending directions of the conductor welding ends located at the third layer of the stator core outside the stator core slot are the same (all counterclockwise along the circumferential direction of the stator core) and the slot distances spanned by circumferential extension are the same, and are all 3 slot distances. 48 second conductors of the second coil group 120, wherein the first second conductor 220 of the U-phase is located in the forty-eighth slot of the second layer of the stator core and the forty-second slot of the third layer, the second conductor 220 of the U-phase is located in the first slot of the second layer of the stator core and the forty-third slot of the third layer, the first second conductor 220 of the V-phase is located in the second slot of the second layer of the stator core and the forty-fourth slot of the third layer, the second conductor 220 of the V-phase is located in the third slot of the second layer of the stator core and the forty-fifth slot of the third layer, the first second conductor 220 of the W-phase is located in the fourth slot of the second layer of the stator core and the forty-sixth slot of the third layer, and the second conductor 220 of the W-phase is located in the fifth slot of the second layer of the stator core and the forty-seventh slot of the third layer; that is, the extension directions of the insertion ends 302 of two conductors adjacent to each other in the second coil group 120 are the same.

48 conductors are located 48 inslot second floor, the third layer in

second coil group

120, 48 conductor weld ends that are located stator core second floor are located the same (all extend clockwise along stator core circumference) of stator core inslot extending direction and extend the slot pitch of strideing across in circumference the same, are 3 slot pitches, the weld end that is located 48 conductors of stator core third layer is located the same (all extend anticlockwise along stator core circumference) of stator core inslot extending direction and extend the slot pitch of strideing across in circumference the same, all be 3 slot pitches.

Exemplarily, as shown in fig. 3, fig. 15, fig. 16, fig. 20, and fig. 21, in the present embodiment, the first conductor 210 of the U-phase among the 24 conductors of the first coil group 110 is located in the first slot and the seventh slot of the first layer of the stator core, the second first conductor 210 of the U-phase is located in the second slot and the eighth slot of the first layer of the stator core, the first conductor 210 of the V-phase is located in the third slot and the forty-fifth slot of the first layer of the stator core, the second first conductor 210 of the V-phase is located in the fourth slot and the forty-sixth slot of the first layer of the stator core, the first conductor 210 of the W-phase is located in the fifth slot and the eleventh slot of the first layer of the stator core, and the second first conductor 210 of the W-phase is located in the sixth slot and the twelfth slot of the first layer of the stator core; that is, the directions in which the plug terminals of two conductors adjacent to each other in the same phase (U-phase, V-phase, or W-phase) in the first coil group extend are the same.

As shown in fig. 3, 15, 16, 20, and 21, the 24 first conductors 210 in the first coil group 110 are located in the first layer of the 48 slots of the stator core, the extending directions of the welding ends of the 24 conductors outside the slots of the stator core are the same (all extending counterclockwise along the circumferential direction of the stator core), and the slot pitches spanned by the circumferential extension are the same, and are all 3 slot pitches.

Illustratively, as shown in fig. 15, 16, 20, 21, any one of the 3 phases of the stator winding 10 is formed by sequentially connecting the U1 branch winding and the U2 branch winding of the U-phase winding in parallel along the circumferential direction of the stator core 20, the weld terminal 303 of the stator winding 10 has an extended terminal, the U-shaped conductors corresponding to the U1 and the U2 branch windings of the U-phase winding of the stator winding are located on the same radially adjacent extended terminal 303 of the first layer of the stator core 20 and connected to the extended terminal 303 of the second layer of the weld terminal, the connected two weld terminals 303 are located on the outer circumference of the stator core slot 21 at a pitch of 6, the extended terminal 303 of the weld terminal 303 of the third layer located on the same radially adjacent position of the stator core 20 is connected to the extended terminal 303 of the fourth layer, the pitch of the two connected welding ends 303 located at the outer periphery of the stator core slot 21 and extending in the circumferential direction is 6, the extending end of the welding end 303 located at the fifth layer adjacent to the same radial direction of the stator core 20 is connected with the extending end of the welding end 303 located at the imaginary sixth layer, the pitch of the two connected welding ends 303 located at the outer periphery of the stator core slot 21 and extending in the circumferential direction has two first connecting portions 150A, 150B, the first connecting portion 150A has a long pitch 7 corresponding to the connected welding end (here, the first connecting portion 150A is formed by connecting one first welding end with another welding end, or directly connecting the welding ends, or connecting the welding ends by using the bus bar 40), the second first connecting portion 150B has a short pitch 5 corresponding to the connected welding end (here, the first connecting portion 150A is formed by connecting one first welding end of another branch with another welding end, or directly connecting the welding ends, or adopting bus bar connection), the pitch of the two welding ends 303 connected with the rest of the fifth layer and the virtual sixth layer in the radial direction of the stator core is 6, that is, the pitch of the two welding ends connected with (welded together with) the stator winding in the outer end of the stator core in the circumferential direction is 6, in this embodiment, the outgoing line and the welding end welded together are both located at one end in the axial direction of the stator core, the outgoing lines (neutral points and incoming line ends) of the two branch windings U1 and U2 are both located at the outer layer in the radial direction of the stator core, and accordingly, the two welding ends can also be arranged at the inner layer in the radial direction of the stator core.

Illustratively, as shown in fig. 22, U-phase conductor lead terminals have U-phase terminals U1 and U2, V-phase conductor lead terminals have V-phase terminals V1 and V2, W-phase conductor lead terminals have W-phase terminals W1 and W2, U-phase conductor outlet terminals U3 and U4, V-phase conductor outlet terminals V3 and V4, and W-phase conductor outlet terminals W3 and W4 use connectors to perform neutral point connection, i.e., to complete the star connection of the parallel connection of the 2-branches of the odd-numbered motor, as shown in fig. 23, U-phase conductor lead terminals U1 and U2 are connected to W-phase conductor outlet terminals W3 and W4, W-phase conductor outlet terminals W1 and W2 are connected to V-phase conductor outlet terminals V3 and V4, V-phase conductor outlet terminals V1 and V2 are connected to U-phase conductor lead terminals U3 and U4, i.e., to complete the parallel connection of the 2-branches of the odd-numbered motor.

The embodiment also provides a motor, which comprises the motor stator, and the motor adopting the motor stator can reduce the production cost and improve the production efficiency.

The utility model discloses in every utmost point every looks slot number the stator slot number/motor pole number/looks number, the pole distance the stator slot number/motor pole number every utmost point every looks slot number the looks number, the quantity in groove is not limited only 48 grooves, can also be the groove of other quantity, for example: the number of slots of each phase of each pole is 2, the corresponding slot poles of the three-phase motor are matched with a 6-pole 36 slot, a 8-pole 48 slot, a 10-pole 60 slot, a 12-pole 72 slot, a 16-pole 96 slot and the like, and the pole distance is 6; the number of slots of each phase of each pole is 3, and the corresponding three-phase motor slot poles are matched with a 6-pole 54 slot, an 8-pole 72 slot, a 10-pole 90 slot, a 12-pole 108 slot, a 16-pole 144 slot and the like, which are not limited one by one.

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

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; the connection may be mechanical or electrical, may be direct, may be indirect via an intermediate medium (bus connection), or may be communication between the two components. The above-described meaning of what is specifically intended in the present invention can be understood in specific instances by those of ordinary skill in the art. Finally, it should be noted that the above description is only a preferred embodiment of the present invention and the technical principles applied.

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

Claims

1. An electric machine stator comprising:

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

a stator winding including a plurality of phase windings mounted on the stator core so as to be different in electrical phase from each other;

the method is characterized in that: at least two branch windings in each phase winding are sequentially connected in parallel along the circumferential direction of the stator core and form M layers in the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3;

each coil group comprises a plurality of conductors, each conductor comprises two slot interiors which are used for being inserted into different slots, and two welding ends which are positioned outside the stator core slots and are connected with the two slot interiors at the other ends;

the pitch of the plurality of conductors of the first coil group is equal to the pole pitch of the stator winding, and the two grooves of the plurality of conductors in the first coil group are positioned on the same layer;

the pitch of the plurality of conductors of the third coil group is equal to the polar distance of the stator winding, or the pitch of a part of the plurality of conductors of the third coil group is larger than the polar distance, and the pitch of other conductors in the third coil group is smaller than the polar distance.

2. The stator according to claim 1, wherein each of the branch windings located in the third coil group has a first weld end, a pitch of the branch windings located in the third coil group, which extends in the circumferential direction of the stator core, is different from a pitch of the branch windings located in the other weld ends of the branch windings located in the third coil group, which extends in the circumferential direction of the stator core, and the first weld ends of the two branch windings in each of the phase windings extend in the circumferential direction of the stator core; except that the slot pitch of each branch winding of each phase winding, which is positioned at the first welding end of the third coil group and extends along the circumferential direction of the stator core, is different from the slot pitch of each branch winding, which is positioned at the other welding ends of the third coil group and extends along the circumferential direction of the stator core, the welding ends of the branch winding, which are positioned at the same radial layer of the stator core, are the same along the circumferential direction of the stator core and have the same slot pitch, and the welding ends of the branch winding, which are positioned at two radially adjacent layers of the stator core, are opposite to each other along the circumferential direction of the stator core.

3. The stator according to claim 2, wherein the other weld terminals connected inside the slots of the third coil group and the weld terminals connected inside the slots of the other coil groups are connected to the corresponding slot inner portions in the same layer, except that the weld terminals connected inside the slots of the third coil group are partially extended from the layer in which the slots are located to the side away from the other coil groups.

4. The motor stator according to any one of claims 1 to 3, further comprising N second coil groups located between the first coil group and the third coil group, wherein a pitch of the plurality of conductors of the second coil group is equal to a pole pitch of the stator winding, and wherein N is an integer of 1 or more.

5. The stator according to any one of claims 1 to 3, further comprising N second coil groups located between the first coil group and the third coil group, wherein a pitch of a part of the plurality of conductors of the second coil group is larger than a pole pitch, and a pitch of another part of the plurality of conductors of the second coil group is smaller than the pole pitch, wherein N is an integer of 1 or more.

6. The electric machine stator of claim 4, wherein the two slot interiors of each conductor in the second coil group are located in two radially adjacent layers of the stator core, and the two slot interiors of each conductor in the third coil group are located in two radially adjacent layers of the stator core.

7. The electric machine stator of claim 5, wherein the two slot interiors of each conductor in the second coil group are located in two radially adjacent layers of the stator core, and the two slot interiors of each conductor in the third coil group are located in two radially adjacent layers of the stator core.

8. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 7.