CN215344118U - Motor stator and motor - Google Patents

Abstract

The utility model provides a motor stator and a motor, wherein each phase winding of the stator winding comprises: k first conductor sets, a plurality of second conductor sets, a plurality of third conductor sets, a plurality of fifth conductor sets, K fifth conductor sets, each phase winding further comprising: and a plurality of first connection welding parts connected together, wherein the first connection welding parts are formed by welding one welding end of the conductor positioned on the M/2-1 radial layer of the stator core with one welding end of the conductor positioned on the M/2 radial layer of the stator core, and the pitch of the first connection welding parts is different from that of the conductor of the third conductor group. According to the technical scheme of the motor stator in the embodiment of the application, the bus bars and the bus bars which are connected in series or in parallel among the windings of each phase in the related technology are eliminated, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the complexity of the manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

Description

Motor stator and motor

Technical Field

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

Background

Stator winding includes a plurality of U-shaped conductors, with a plurality of U-shaped conductors according to certain mode of arranging, wears into stator core's inslot, forms the three-phase winding of required motor, need use a large amount of busbars and busbar connection this phase winding between every phase winding among the prior art, stator winding's the mode of arranging is complicated, takes shape the difficulty, high in production cost, machining efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a motor stator and a motor, which cancel a bus bar and a bus bar, realize uniform heat dissipation, improve power and torque, simplify a wiring mode, further reduce the complexity of a manufacturing process, reduce production cost and improve processing efficiency.

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

a stator core having a plurality of core slots formed in a radially inner surface thereof

Spaced apart on the face and in a circumferential direction of the stator core at a predetermined slot pitch;

the stator winding comprises a plurality of phase windings arranged on a stator core, and M layers are formed in the radial direction of the stator core, wherein M is greater than or equal to 4X +2, and X is greater than or equal to 1;

each phase winding includes: k first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups and K fifth conductor groups, wherein K is an integer greater than or equal to 1, and any conductor group comprises a plurality of conductors;

the K first conductor groups are positioned on the Mth radial layer of the stator core, the K fifth conductor groups are positioned on the first radial layer of the stator core, and the third conductor groups are positioned on the M/2 th layer and the M/2+1 th layer which are adjacent to the stator core in the radial direction;

each phase winding further comprises: and a plurality of first connection welding parts connected together, wherein the first connection welding parts are formed by welding one welding end of the conductor positioned on the M/2-1 radial layer of the stator core with one welding end of the conductor positioned on the M/2 radial layer of the stator core, and the pitch of the first connection welding parts is different from that of the conductor of the third conductor group.

Further, the third conductor set includes the same third conductor; the pitch of the third conductor is a long pitch and the pitch of the first connection weld is a short pitch; or the pitch of the third conductor is a short pitch and the pitch of the first connection weld is a long pitch.

Further, the third conductor set includes a third large conductor and a third small conductor; the pitch of the third large conductor of the third conductor group is a long pitch, the pitch of the third small conductor of the third conductor group is a full pitch, and the pitch of the first connection welding part is a short pitch; or the pitch of the third large conductor of the third conductor group is a full pitch and the pitch of the third small conductor of the third conductor group is a short pitch and the pitch of the first connection weld is a long pitch.

Further, the first conductor group and the fifth conductor group have the same structure, and each of the first conductor group and the fifth conductor group includes a fifth large conductor and a fifth small conductor.

Further, the first conductor group and the fifth conductor group have different structures, the first conductor group includes the same first conductor, and the fifth conductor group includes a fifth large conductor and a fifth small conductor.

Further, when K is equal to 1, each phase winding includes 1 first conductor group, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups, and 1 fifth conductor group connected in series in the circumferential direction of the stator core; when K is equal to 2, each phase winding includes 2 first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups, and 2 fifth conductor groups connected in parallel along the stator core circumferential direction 2 branch.

Further, when K is equal to 1, each phase winding includes 1 first conductor group, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups, and 1 fifth conductor group, which are connected in parallel along a 2-branch in the circumferential direction of the stator core; when K is equal to 2, each phase winding includes 2 first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups, and 2 fifth conductor groups connected in parallel along a stator core circumferential direction 4 branch.

Further, a plurality of second conductor groups are located on the Y-th layer and the Y + 1-th layer which are adjacent to each other in the radial direction of the stator core, Y is an odd number which is larger than or equal to 1 and is not equal to M/2, the second conductor groups comprise the same second conductors, the pitch of the second conductors is a whole pitch, or the second conductor groups comprise a second large conductor and a second small conductor, the pitch of the second large conductor is a long pitch, and the pitch of the second small conductor is a short pitch.

Further, a plurality of fifth conductor groups are located in the nth layer and the (N + 1) th layer which are radially adjacent to the stator core, N is an even number, the fifth conductor groups comprise the same fifth conductors, the pitch of the fifth conductors is a whole pitch, or the fifth conductor groups comprise a fifth large conductor and a fifth small conductor, the pitch of the fifth large conductor is a long pitch, and the pitch of the fifth small conductor is a short pitch.

Further, the phase winding is provided with a plurality of second connection welding parts which are connected together, one welding end of the conductor positioned on the Z-1 radial layer of the stator core is welded with one welding end of the conductor positioned on the Z-1 radial layer of the stator core, the pitch of the second connection welding parts is a whole pitch, Z is an even number and is not equal to M/2+ 1.

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

By applying the technical scheme of the utility model, the stator core is provided with a plurality of core slots which are formed on the radial inner surface of the stator core and are spaced at preset slot pitches along the circumferential direction of the stator core; the stator winding comprises a plurality of phase windings arranged on a stator core, and M layers are formed in the radial direction of the stator core, wherein M is greater than or equal to 4X +2, and X is greater than or equal to 1; the method is characterized in that: each phase winding includes: k first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups and K fifth conductor groups, wherein K is an integer greater than or equal to 1, and any conductor group comprises a plurality of conductors; the K first conductor groups are positioned on the Mth radial layer of the stator core, the K fifth conductor groups are positioned on the first radial layer of the stator core, and the third conductor groups are positioned on the M/2 th layer and the M/2+1 th layer which are adjacent to the stator core in the radial direction; each phase winding further comprises: and a plurality of first connection welding parts connected together, wherein the first connection welding parts are formed by welding one welding end of the conductor positioned on the M/2-1 radial layer of the stator core with one welding end of the conductor positioned on the M/2 radial layer of the stator core, and the pitch of the first connection welding parts is different from that of the conductor of the third conductor group. According to the technical scheme of the motor stator in the embodiment of the application, the bus bars and the bus bars which are connected in series or in parallel among the windings of each phase in the related technology are eliminated, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the complexity of the manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

Drawings

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

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

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

FIG. 3 is a schematic diagram of a fifth conductor set according to a first embodiment of the present invention;

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

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

FIG. 6 is a schematic diagram of a second conductor set according to a first embodiment of the present invention;

FIG. 7 is a schematic structural diagram of insulation paper in a slot of a stator of a first motor according to an embodiment of the present invention;

FIG. 8 is a schematic view of the structure of the insulation paper in the slots of the stator of the second motor according to the embodiment of the utility model;

FIG. 9 is a schematic view of an insulation paper structure in a stator slot of a third motor according to an embodiment of the present invention;

FIG. 10 is a schematic view of an insulation paper structure in a slot of a stator of a fourth motor according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an insulating paper in a slot of a fifth motor in the embodiment of the utility model;

FIG. 12A is a schematic diagram of a planar development of the plug end of a phase winding according to an embodiment of the present invention;

FIG. 12B is a schematic diagram of a phase winding with an expanded weld end plane according to an embodiment of the present invention;

FIG. 13A is a schematic diagram of a planar development of the plug end of the phase winding according to the second embodiment of the present invention;

FIG. 13B is a schematic diagram of a planar development of the welding ends of the phase winding in the second embodiment of the present invention;

FIG. 14A is a schematic diagram of a planar development of the plug end of a phase winding according to a third embodiment of the present invention;

FIG. 14B is a schematic diagram of a planar development of the welded ends of a phase winding in a third embodiment of the present invention;

FIG. 15A is a schematic diagram of a planar development of the plug end of a phase winding according to a fourth embodiment of the present invention;

FIG. 15B is a schematic diagram of a weld end plane development of a phase winding in a fourth embodiment of the present invention;

FIG. 16A is a schematic diagram of a planar development of the plug end of a phase winding in accordance with an embodiment of the present invention;

FIG. 16B is a schematic diagram of a planar expanded weld end of a phase winding according to a fifth embodiment of the present invention;

fig. 17A is a schematic diagram of a planar development of the plug end of a phase winding in a sixth embodiment of the utility model;

FIG. 17B is a schematic diagram of a weld end plane development of a phase winding in a sixth embodiment of the present invention;

FIG. 18A is a schematic diagram of a planar development of the plug end of a phase winding in the seventh embodiment of the present invention;

FIG. 18B is a schematic diagram of a weld end plane development of a phase winding in a seventh embodiment of the present invention;

fig. 19A is a schematic diagram of a planar development of the plug end of an eighth phase winding according to an embodiment of the present invention;

FIG. 19B is a schematic diagram of an expanded plan view of the welded ends of an eighth phase winding according to an embodiment of the present invention;

fig. 20A is a schematic diagram of a planar development of the plug end of a phase winding in accordance with a ninth embodiment of the utility model;

fig. 20B is an expanded plan view of the welding ends of a phase winding in accordance with the ninth embodiment of the present invention;

FIG. 21A is a schematic diagram of a planar development of the phase windings in a tenth embodiment of the utility model;

FIG. 21B is a schematic diagram of a weld end plane development of a ten phase winding according to an embodiment of the present invention;

FIG. 22A is a schematic diagram of a planar development of the phase windings in the eleventh phase according to the embodiment of the present invention;

FIG. 22B is a schematic diagram of a weld end plane development of a phase winding in an eleventh phase of an embodiment of the present invention;

FIG. 23A is a schematic diagram of a twelve-phase winding phase-end planar development in accordance with an embodiment of the present invention;

FIG. 23B is a schematic diagram of a weld end plane development of a phase winding in a twelfth embodiment of the present invention;

Detailed Description

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

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

The utility model provides a motor stator. The extending direction of A1A2 in FIG. 1 is parallel to the axial direction of the stator core, and the pitch in the application is the interval between two slot inner parts 301 of the same conductor along the circumferential direction, or the pitch is the sum of the span between the slot inner parts 301 corresponding to one welding end of one conductor and the span between the slot inner parts 301 corresponding to one welding end of the other conductor; each conductor comprises two slot inner parts 301 positioned in different slots in the circumferential direction of the stator core, an out-slot turning part 302 positioned outside the slots and connected to the two slot inner parts 301, and a slot outer end part 303 positioned outside the slots and respectively connected to the two slot inner parts; it should be noted that, in this application, the radial first layer of the stator core may be the first layer in the direction away from the central axis of the stator core, and may also be the first layer in the direction close to the central axis of the stator core.

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

as shown in fig. 1 to 2, 12A to 23B, the stator winding 10, which includes a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, is formed into M layers in the radial direction of the stator core 20, and the phase windings (U-phase winding or V-phase winding or W-phase winding) in the present embodiment are formed into 6 layers in the radial direction of the stator core; it should be noted that M may be 4X +2, where X is equal to 1, i.e. 6 layers, M is 10 layers when X is equal to 2, and M is 14 layers when X is equal to 3.

Referring to fig. 1 to 23B, in the present embodiment, the stator winding 10 is mounted on the stator core 20, that is, the plurality of phase windings mounted on the stator core 20 are different from each other in electrical phase, and in the first to twelfth embodiments, the stator winding 10 is a three-phase (i.e., U-phase winding, V-phase winding, W-phase winding) winding, and each phase slot of each pole is equal to or equal to 2; each pole of the rotor is provided with 6 slots 21, the rotor has eight poles and is such that for each phase of the three-phase stator winding 10, the number of slots 21 provided in the stator core 20 is equal to 48 (i.e., 2X8X3), and further, in the present embodiment, the stator core 20 defines one tooth 22 by two adjacent slots 21, and the stator core 20 is formed by laminating a plurality of annular magnetic steel plates to form both end faces 25, 26 of the stator core in the axial direction, and other conventional metal plates may be used instead of the magnetic steel plates. Fig. 7 shows that the first kind of in-slot insulating paper 30 in this embodiment is B-shaped insulating paper, fig. 8 shows that the second kind of in-slot insulating paper 30 in this embodiment is double-mouth insulating paper, fig. 9 shows that the third kind of in-slot insulating paper 30 in this embodiment is S-shaped insulating paper, fig. 10 shows that the fourth kind of in-slot insulating paper 30 in this embodiment is large S-shaped insulating paper, in this embodiment, any one of the four kinds of in-slot insulating paper can be selected to isolate the inter-phase conductors in the slots 21, fig. 11 shows that the fifth kind of in-slot insulating paper 30 in this embodiment is single large-mouth insulating paper, when the conductor insulation is selected to be thicker, the isolation is not required in the middle, and the fifth kind of in-slot insulating paper 30 can be used.

As shown in fig. 12A to 15B, 17A, 17B, and 19A to 23B, in the first to fourth embodiments, the sixth embodiments, and the eighth to twelfth embodiments of the present invention, each phase winding (U-phase winding, V-phase winding, and W-phase winding) includes 1 first conductor group, 12 second conductor groups, 6 third conductor groups, and 1 fifth conductor group, as shown in fig. 16A, 16B, 18A, and 18B, in the fifth embodiment and the seventh embodiment, each phase winding (U-phase winding, V-phase winding, and W-phase winding) includes 2 first conductor groups, 8 second conductor groups, 4 third conductor groups, and 2 fifth conductor groups, and K is an integer greater than or equal to 1.

As shown in fig. 12A to 23B, in the first to twelfth embodiments, 1 first conductor group (or 2 first conductor groups) is located in the first radial layer of the stator core, 1 fifth conductor group 100 (or 2 fifth conductor groups 100) is located in the sixth radial layer of the stator core, and 6 third conductor groups (or 4 third conductor groups) are located in the 3 rd and 4 th radial layers adjacent to the stator core;

as shown in fig. 12A to 23B, in the first to twelfth embodiments, each of the phase windings (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welds 800 connected together, each of the first connection welds 800 is formed by welding one welding end 303 connected to one slot inside 301 of one conductor (2000A, 2000B, 2500) located at the radially 3 rd layer of the stator core and one welding end connected to one slot inside of another conductor (2000A, 2000B, 2500) located at the radially 4 th layer of the stator core to the same two radially adjacent welding ends, and one of the second large conductor 2000A or the second small conductor 2000B or the second conductor 2500 or the third large conductor 2000A or the third small conductor 2000B or the third conductor 2500 connected to one slot inside of the radially third layer of the stator core and one of the second large conductor 2000A or the second small conductor 2000B or the second conductor 2500 or the third large conductor 2000A or the third small conductor 2000B or the third conductor 2500 or the third conductor 2000B or the third conductor 2500 located at the radially third layer of the stator core The pitch between the first connection welding parts 800 formed by welding the welding ends connected inside the grooves of the radial fourth layer is a long pitch, or the pitch of the first connection welding parts 800 is a short pitch; specifically, referring to fig. 13A and 13B, the first connection weld 800 is a connection weld in which the slot interior 301 connecting one welding end 303 of one conductor (2000A, 2000B, 2500) located at the 4 th layer in the radial direction of the stator core is located at the 8 th slot in the 3 rd layer of the stator core, and the slot interior 301 connecting one welding end 303 of another conductor (2000A, 2000B, 2500) located at the 3 rd layer in the radial direction of the stator core is located at the 8 th slot in the 3 rd layer of the stator core, and the pitch between the slot interiors corresponding to the two welding ends is a long pitch of 7, referring to fig. 12A and 12B, the first connection weld is a connection weld in which the slot interior 301 connecting one welding end 303 of one conductor (2000A, 2000B, 2500) located at the 4 th layer in the radial direction of the stator core is located at the 7 th slot in the 3 rd layer of the stator core, the pitch between the inner parts of the grooves corresponding to the two welded ends is a short pitch 5; that is, the phase winding has a plurality of first connection welding portions 800 connected together, the first connection welding portion 800 is a welding end located on the radial 3 rd layer of the stator core in the conductors located on the radial 3 th layer and the radial 4 th layer of the stator core in the conductors located on the radial 3 rd layer and the radial 4 th layer of the stator core in the stator core, and the pitches of the first connection welding portions 800 welded together may all be long pitches, or the first connection welding portions 800 welded together may all be short pitches; with reference to fig. 12A, 12B, 14A, 14B, and 16A to 21B, the pitch of the first connection solder 800 is a long pitch, and the conductor pitch of the corresponding third conductor group is not equal to the long pitch, and with reference to fig. 13A, 13B, 15A, 15B, and 22A to 23B, the pitch of the first connection solder 800 is a short pitch, and the conductor pitch of the corresponding third conductor group is not equal to the short pitch. According to the technical scheme of the motor stator in the embodiment of the application, the bus bars and the bus bars which are connected in series or in parallel among the windings of each phase in the related technology are eliminated, the heat dissipation is uniform, the power and the torque are improved, the wiring mode is simplified, the complexity of the manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

Alternatively, as shown in fig. 12A, 12B, and 16A to 21B, in the first embodiment, the fifth embodiment, and the ninth embodiment, the third conductor group 350 includes two identical third conductors 2500, and the pitch of the third conductors 2500 is long pitch 7, specifically, in conjunction with fig. 17A and 17B, the first third conductor 2500 of the third conductor group 350 is located in the 8 th slot of the 4 th layer of the stator core and the 1 st slot of the 3 rd layer, the second third conductor 2500 of the third conductor group 350 is located in the 9 th slot of the 4 th layer of the stator core and the 2 nd slot of the 3 rd layer of the stator core, that is, the pitch of the third conductor group 350 is long pitch 7; the first connection welding part is that the slot inner part 301 of one welding end 303 of one third conductor 2500 positioned on the 4 th layer in the radial direction of the stator core is positioned in the 8 th slot of the 4 th layer of the stator core and the slot inner part 301 of one welding end 303 of the other third conductor 2500 positioned on the 3 rd layer in the radial direction of the stator core is positioned in the 13 th slot of the 3 rd layer of the stator core, and the pitch between the corresponding slot inner parts of the two welded welding ends is 5 short pitches;

alternatively, as shown in fig. 6, 13A, 13B, and 22A to 23B, in the second embodiment, the tenth embodiment to the eleventh embodiment, the third conductor group 350 includes two third conductors 2500, specifically, the first third conductor 2500 of the third conductor group 350 is located in the 2 nd slot of the 3 rd layer and the 7 th slot of the 4 th layer of the stator core, the second third conductor 2500 of the third conductor group 350 is located in the 3 rd slot of the 3 rd layer and the 8 th slot of the 4 th layer of the stator core, that is, the pitch of the third conductors of the third conductor group is the short pitch 5; the first connection welding part is that the slot inner part 301 of one welding end 303 of a third conductor 2500 positioned on the 4 th layer in the radial direction of the stator core is positioned in the 7 th slot of the 4 th layer of the stator core and the slot inner part 301 of one welding end 303 of another third conductor 2500 positioned on the 3 rd layer in the radial direction of the stator core is positioned in the 14 th slot of the 3 rd layer of the stator core, and the pitch between the corresponding slot inner parts of the two welding ends is long pitch 7;

alternatively, as shown in fig. 5, 14A and 14B, in the third embodiment, the third large conductor 2000A of the third conductor group 300 is located in the 9 th slot of the 4 th layer of the stator core and the 1 st slot of the 3 rd layer, the third small conductor 2000B of the third conductor group 300 is located in the 8 th slot of the 4 th layer of the stator core and the 2 nd slot of the 3 rd layer, that is, the pitch of the third large conductor 2000A of the third conductor group is a long pitch 8, and the pitch of the third small conductor 2000B of the third conductor group is a full pitch 6; the first connecting welding part is that the inside of a groove 301 connecting one welding end 303 of a third small conductor 2000B positioned on the 4 th layer in the radial direction of the stator core is positioned in the 8 th groove of the 4 th layer of the stator core and the inside of a groove 301 connecting one welding end 303 of another third large conductor 2000A positioned on the 3 rd layer in the radial direction of the stator core is positioned in the 13 th groove of the 3 rd layer of the stator core, and the pitch between the inside of the grooves corresponding to the two welding ends is a short pitch 5;

alternatively, as shown in fig. 5, 15A and 15B, in the fourth embodiment, the third large conductor 2000A of the third conductor group 300 is located in the 2 nd slot of the 3 rd layer and the 8 th slot of the 4 th layer of the stator core, and the third small conductor 2000B of the third conductor group 300 is located in the 3 rd slot of the 3 rd layer and the 7 th slot of the 4 th layer of the stator core, that is, the pitch of the third large conductor 2000A of the third conductor group is the full pitch 6, and the pitch of the third small conductor 2000B of the third conductor group is the short pitch 4; the first connection welding part is that the slot inner part 301 of one welding end 303 of a third small conductor 2000B positioned on the 4 th layer in the radial direction of the stator core is connected with the slot inner part 301 of the 7 th slot positioned on the 4 th layer of the stator core and one welding end 303 of another third large conductor 2000A positioned on the 3 rd layer in the radial direction of the stator core, the slot inner part 301 is positioned on the 14 th slot positioned on the 3 rd layer of the stator core, and the pitch between the slot inner parts corresponding to the two welding ends is long pitch 7;

as shown in fig. 3 and 17A to 18B, in the sixth to seventh embodiments, the first conductor group includes a fifth large conductor 1000A and a fifth small conductor 1000B, and with reference to fig. 17A and 17B, the fifth large conductor 1000A of the first conductor group is located in the 26 th slot and the 33 th slot of the sixth layer in the radial direction of the stator core, the pitch of the fifth large conductor 1000A of the first conductor group is long pitch 7, the fifth small conductor 1000B of the first conductor group is located in the 27 th slot and the 32 th slot of the sixth layer in the radial direction of the stator core, and the pitch of the fifth small conductor 1000B of the first conductor group is short pitch 5; the fifth conductor group 100 comprises a fifth large conductor 1000A and a fifth small conductor 1000B, the fifth large conductor 1000A of the fifth conductor group is positioned in the 19 th slot and the 26 th slot of the first layer in the radial direction of the stator core, the pitch of the fifth large conductor 1000A of the fifth conductor group is long pitch, the fifth small conductor 1000B of the fifth conductor group is positioned in the 20 th slot and the 25 th slot of the first layer in the radial direction of the stator core, and the pitch of the fifth small conductor 1000B of the fifth conductor group is short pitch; that is, the pitch of the fifth large conductor of the first conductor group is the same as the pitch of the fifth large conductor of the fifth conductor group, and the pitch of the fifth small conductor of the first conductor group is the same as the pitch of the fifth small conductor of the fifth conductor group, except that the out-of-slot weld ends of the conductors of the first conductor group are different from the out-of-slot weld ends of the conductors of the fifth conductor group in the extending direction of the stator core in the circumferential direction.

Further, as shown in fig. 17A and 17B, in the sixth embodiment, when K is equal to 1, each phase winding includes 1 first conductor group 100, 12 second conductor groups, 6 third conductor groups 350(300), 4 fourth conductor groups, and 1 fifth conductor group 100, which are connected in parallel along a stator core circumferential direction 2 branch; as shown in fig. 18A and 18B, in the sixth embodiment, when K is equal to 2, each phase winding includes 2 first conductor groups 100, 8 second conductor groups, 4 third conductor groups 350(300), 8 fourth conductor groups, and 2 fifth conductor groups 100, which are connected in parallel along 4 branches in the stator core circumferential direction.

As shown in fig. 3, 4, 12A to 16B, and 19A to 23B, in the first to fifth embodiments, and the eighth to twelfth embodiments, the first conductor set 150 includes two first conductors 1500, the first conductor 1500 of the first conductor set 150 is located in the 26 th slot and the 32 th slot of the sixth layer in the radial direction of the stator core, the pitch of the first conductor 1500 of the first conductor set 150 is the full pitch 6, the first conductor 1500 of the first conductor set 150 is located in the 27 th slot and the 33 th slot of the sixth layer in the radial direction of the stator core, and the pitch of the first conductor 1500 of the first conductor set is the full pitch 6; the fifth conductor group 100 comprises a fifth large conductor 1000A and a fifth small conductor 1000B, the fifth large conductor 1000A of the fifth conductor group 100 is positioned in the 19 th slot and the 26 th slot of the first radial layer of the stator core, the pitch of the fifth large conductor 1000A of the fifth conductor group 100 is long pitch, the fifth small conductor 1000B of the fifth conductor group 100 is positioned in the 20 th slot and the 25 th slot of the first radial layer of the stator core, and the pitch of the fifth small conductor 1000B of the fifth conductor group 100 is short pitch; that is, the pitch of the first conductor 1500 of the first conductor group 150 is different from the pitch of the fifth large conductor 1000A of the fifth conductor group 100, and the pitch of the first conductor 1500 of the first conductor group 150 is different from the pitch of the fifth small conductor 1000B of the fifth conductor group 100, (the direction in which the out-of-slot weld ends of the conductors of the first conductor group and the direction in which the out-of-slot weld ends of the conductors of the fifth conductor group extend in the circumferential direction of the stator core are different), the same structure of the conductor groups in the present application does not include the direction in which the weld ends of the conductors extend in the circumferential direction of the stator core.

Further, as shown in fig. 12A to 15B and 19A to 23B, in the first to fourth embodiments and the eighth to twelfth embodiments, when K is equal to 1, each phase winding includes 1 first conductor group 150, 12 second conductor groups, 6 third conductor groups 350(300), 4 fourth conductor groups, and 1 fifth conductor group 100, which are connected in series along the circumferential direction of the stator core; as shown in fig. 16A and 16B, in the fifth embodiment, when K is equal to 2, each phase winding includes 2 first conductor groups 150, 8 second conductor groups, 4 third conductor groups 350(300), 8 fourth conductor groups 450(400), and 2 fifth conductor groups 100 connected in parallel along the stator core circumferential direction 2 branches.

As shown in fig. 12A to 23B, in the embodiment, 12 second conductor groups (or 8 second conductor groups) are located on the Y-th layer and the Y + 1-th layer which are radially adjacent to the stator core, half of the 12 second conductor groups (or 8 second conductor groups) are located on the 1-th layer and the 2-th layer which are radially adjacent to the stator core, half of the 12 second conductor groups (or 8 second conductor groups) are located on the 5-th layer and the 6-th layer which are radially adjacent to the stator core, Y is equal to 1, 5, and Y is not equal to M/2 (M is 6 in the present application); with reference to fig. 18A, 18B, and 20A to 23B, in the first to seventh embodiments and the ninth to twelfth embodiments, the second conductor set includes the same second conductor 2500, the first second conductor 2500 of the second conductor set 250 is located in the 1 st slot of the 1 st layer and the 7 th slot of the 2 nd layer of the stator core, and the second conductor 2500 of the second conductor set 250 is located in the 2 nd slot of the 1 st layer and the 8 th slot of the 2 nd layer of the stator core; i.e. the pitch of the second conductors of the second conductor set is the full pitch 6; as shown in fig. 19A and 19B, in the eighth embodiment, the second conductor group 200 includes a second large conductor 2000A and a second small conductor 2000B, the second large conductor 2000A of the second conductor group is located in the 1 st slot of the 1 st layer and the 8 th slot of the 2 nd layer of the stator core, the second small conductor 2000B of the second conductor group is located in the 2 nd slot of the 1 st layer and the 7 th slot of the 2 nd layer of the stator core, i.e., the pitch of the second large conductor of the second conductor set is the long pitch 7, and the pitch of the second small conductor of the second conductor set is the short pitch 5, the eighth embodiment differs from the first embodiment only in the structure of the second conductor set, the remaining conductor sets are the same, that is, the structure of the second conductor set in the first to seventh embodiments and the ninth to twelfth embodiments of the present application may also be the structure of the second conductor set in the eighth embodiment of the present application, and further details on the matching between the structure of the second conductor set, which is the second large conductor and the second small conductor, and other conductor sets are not described in this application.

As shown in fig. 12A to 23B, in the first to twelfth embodiments, 4 fourth conductor groups (8 fourth conductor groups) of each phase winding are located on the 2 nd and 3 rd layers, and the 4 th and 5 th layers, which are radially adjacent to the stator core; wherein 2 fourth conductor groups (4 fourth conductor groups) are positioned on the 2 nd layer and the 3 rd layer which are adjacent to the stator core in the radial direction, and the other 2 fourth conductor groups (4 fourth conductor groups) are positioned on the 4 th layer and the 5 th layer which are adjacent to the stator core in the radial direction; with reference to fig. 12A to 19B, the fourth conductor set 450 includes two identical fourth conductors, the two slot interiors of the first fourth conductor of the fourth conductor set 450 are located in the core slots 26 and 32, and the two slot interiors of the second fourth conductor of the fourth conductor set 450 are located in the core slots 27 and 33, that is, the pitch between the two slot interiors of the two fourth conductors of the fourth conductor set 450 is the full pitch 6; with reference to fig. 20A, 20B, 22A, and 22B, the fourth conductor group includes a fourth large conductor and a fourth small conductor, two groove interiors of the first fourth large conductor of the fourth conductor group 450 are located in the core grooves 20 and 27, and a pitch between two groove interiors of the fourth large conductor of the fourth conductor group 450 is a long pitch 7; two groove interiors of the fourth small conductor of the fourth conductor group 450 are located in the core grooves 21 and 26, a pitch between two groove interiors of the fourth small conductor of the fourth conductor group 450 is a short pitch 5, a structure of the fourth conductor group in the ninth embodiment is different from that of the fourth conductor group in the first embodiment, structures of the other conductor groups are the same, and accordingly, a pitch of the fourth conductor group in the ninth embodiment can replace the structure of the fourth conductor group in the other embodiments, and further description is not given to a matching form between the structure of the fourth conductor group including the fourth large conductor and the fourth small conductor and the other conductor groups.

As shown in fig. 12A to 23B, in the first to twelfth embodiments, the phase winding has a plurality of second connection welds 900 connected together, the second connection welds being one weld 303 of the conductor located at the Z-1 radial layer of the stator core and one weld 303 of the conductor located at the Z-radial layer of the stator core, and specifically, the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of second connection welds 900 connected together, the second connection welds 900 being one weld 303 of one in-slot portion 301 of one conductor (1000A, 1000B, 2500, 2000A, 2000B) located at the 1 radial layer (Z is 2) of the stator core and one weld of one in-slot portion 301 of another conductor (2000A, 2000B, 2500) located at the 2 radial layer (Z is 2) of the stator core, and welding the same two radially adjacent weld of the two end, the second connection welding part 900 is formed by welding one welding end connected inside one slot of one conductor (2000A, 2000B, 2500) positioned on the 5 th radial layer (Z is 6) of the stator core and one welding end connected inside one slot of the other conductor (1000A, 1000B, 1500, 2500, 2000A, 2000B) positioned on the 6 th radial layer (Z is 6) of the stator core to two welding ends which are adjacent in the same radial direction; the pitch between the second connection welding parts formed by welding the welding ends of the first large conductor 1000A or the first small conductor 1000B or the second small conductor 2500 or the second large conductor 2000A or the second small conductor 2000B, which are positioned in the inner part of the slot of the first layer in the radial direction of the stator core, and the welding ends of the second large conductor 2000A or the second small conductor 2000B or the second conductor 2500 or the fourth large conductor or the fourth small conductor, which are positioned in the inner part of the slot of the second layer in the radial direction of the stator core, is a whole pitch; the pitch between the welding ends of the second large conductor 2000A or the second small conductor 2000B or the second conductor 2500 or the fourth large conductor or the fourth small conductor, which are connected inside the slot of the fifth layer in the radial direction of the stator core, and the second connection welding parts formed by welding the welding ends of the first large conductor 1000A or the first small conductor 1000B or the first conductor 1000 or the second conductor 2500 or the second large conductor 2000A or the second small conductor 2000B, which are connected inside the slot of the first layer in the radial direction of the stator core, is a whole pitch; specifically, in combination 12, the second connection weld is that the slot inner 301 connecting one welding end 303 of one conductor (2000A, 2000B, 2500) positioned at the 2 nd layer in the radial direction of the stator core is positioned at the 7 th slot of the 1 st layer of the stator core, the slot inner 301 connecting one welding end 303 of the other conductor (1000A, 1000B, 2500, 2000A, 2000B) positioned at the 1 st layer in the radial direction of the stator core is positioned at the 7 th slot of the 1 st layer of the stator core, the pitch between the slot inner parts corresponding to the two welding ends is the whole pitch 6, the second connection weld is that the slot inner 301 connecting one welding end 303 of one conductor (2000A, 2000B, 2500) positioned at the 5 th layer in the radial direction of the stator core is positioned at the 8 th slot of the 5 th layer of the stator core and the slot inner 301 connecting one welding end 303 of the other conductor (2000A, 2000B, 2500, 1500, 1000A, 1000B) positioned at the 6 th layer in the radial direction of the stator core is positioned at the 2 nd layer of the 2 nd slot of the stator core, the pitch between the inner portions of the grooves corresponding to the two welded ends is a full pitch 6, in this embodiment, Z is an even number, Z is 2, 6 and is not equal to M/2+1 (M is 6 in this application).

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

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

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

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

Claims (11)

1. An electric machine stator comprising:

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

the stator winding comprises a plurality of phase windings arranged on the stator core, and M layers are formed in the radial direction of the stator core, wherein M is greater than or equal to 4X +2, and X is greater than or equal to 1;

the method is characterized in that: each of the phase windings includes: k first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups and K fifth conductor groups, wherein K is an integer greater than or equal to 1, and any conductor group comprises a plurality of conductors;

the K first conductor groups are positioned on the radial Mth layer of the stator core, the K fifth conductor groups are positioned on the radial first layer of the stator core, and the third conductor groups are positioned on the M/2 th layer and the M/2+1 th layer which are adjacent to the stator core in the radial direction;

each of the phase windings further comprises: a plurality of first connection welding parts connected together, wherein one welding end of the conductor positioned at the radial M/2-1 layer of the stator core is welded with one welding end of the conductor positioned at the radial M/2 layer of the stator core, and the pitch of the first connection welding parts is different from that of the conductor of the third conductor group.

2. The electric machine stator of claim 1, wherein the third conductor set comprises identical third conductors; the pitch of the third conductor is a long pitch and the pitch of the first connection weld is a short pitch; or the pitch of the third conductor is a short pitch and the pitch of the first connection weld is a long pitch.

3. The electric machine stator of claim 1, wherein the third conductor set comprises a third large conductor and a third small conductor; the pitch of the third large conductor of the third conductor set is a long pitch, the pitch of the third small conductor of the third conductor set is a full pitch, and the pitch of the first connection weld is a short pitch; or the pitch of the third large conductor of the third conductor set is a full pitch and the pitch of the third small conductor of the third conductor set is a short pitch and the pitch of the first connection weld is a long pitch.

4. The electric machine stator according to any one of claims 2 to 3, wherein the first conductor group and the fifth conductor group have the same structure, and each of the first conductor group and the fifth conductor group includes a fifth large conductor and a fifth small conductor.

5. The electric machine stator according to any one of claims 2 to 3, wherein the first conductor group and the fifth conductor group are different in structure, the first conductor group includes the same first conductor, and the fifth conductor group includes a fifth large conductor and a fifth small conductor.

6. The electric machine stator of claim 5, wherein when K equals 1, each of the phase windings comprises 1 of the first conductor set, a plurality of the second conductor set, a plurality of the third conductor set, a plurality of the fourth conductor set, and 1 of the fifth conductor set connected in series circumferentially along the stator core; when K is equal to 2, each of the phase windings includes 2 first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups, and 2 fifth conductor groups, which are connected in parallel along 2 branches in the circumferential direction of the stator core.

7. The electric machine stator of claim 4, wherein when K equals 1, each of the phase windings comprises 1 of the first conductor set, a plurality of the second conductor set, a plurality of the third conductor set, a plurality of the fourth conductor set, and 1 of the fifth conductor set connected in parallel along 2 legs in a circumferential direction of the stator core; when K is equal to 2, each of the phase windings includes 2 first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, a plurality of fourth conductor groups, and 2 fifth conductor groups, which are connected in parallel along 4 branches in the circumferential direction of the stator core.

8. The stator according to any one of claims 6 to 7, wherein a plurality of the second conductor groups are located on a Y-th layer and a Y + 1-th layer radially adjacent to the stator core, Y is an odd number equal to or greater than 1 and is not equal to M/2, the second conductor groups include identical second conductors, and the pitch of the second conductors is a full pitch, or the second conductor groups include a second large conductor and a second small conductor, the pitch of the second large conductor is a long pitch, and the pitch of the second small conductor is a short pitch.

9. The electric machine stator of claim 8, wherein a plurality of the fourth conductor sets are located in the nth and N +1 th layers radially adjacent to the stator core, N being an even number, the fourth conductor sets including identical fourth conductors, the fourth conductors having a pitch that is a full pitch, or the fourth conductor sets including a fourth large conductor having a pitch that is a long pitch and a fourth small conductor having a pitch that is a short pitch.

10. A motor stator according to any one of claims 1 to 3, wherein the phase winding has a plurality of second connection welds connecting together, the second connection welds being formed by welding one weld end of a conductor located at a Z-1 radial layer of the stator core to one weld end of a conductor located at a Z-radial layer of the stator core, the second connection welds having a pitch of a full pitch, Z being an even number and Z not being equal to M/2+ 1.

11. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 10.

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