CN215344117U - 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 groups, a plurality of second conductor groups, 2K third conductor groups and K fourth conductor groups, wherein K is an integer greater than or equal to 1; the K first conductor groups are positioned on the Mth radial layer of the stator core, the K fourth conductor groups are positioned on the first radial layer of the stator core, and the 2K third conductor groups are positioned on the Mth/2 layer and the Mth/2 +1 layer which are adjacent to each other in the radial direction of the stator core; the plurality of second conductor groups are positioned on the N-th layer and the (N + 1) -th layer which are adjacent to each other in the radial direction of the stator core, and N is an odd number which is larger than or equal to 1. The first conductor group and the fourth conductor group are adopted to realize local homostorey, so that the turn number of a magnetic circuit of the stator winding can be adjusted more flexibly, and each branch circuit does not need to use a bridge wire, thereby solving the problem of over-high local temperature; any two branch windings are rotationally symmetrical, and the loop current of the stator winding is cancelled.

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

The stator winding comprises a plurality of hairpin coils, and the hairpin coils penetrate into a slot of a stator core according to a certain arrangement mode to form a single-phase winding or a multi-phase winding of a required motor; in addition, the stator windings used in the prior art are various, the manufacturing process is complex, the production cost is high, and the processing efficiency is low; the current magnetic circuit of the stator winding has the problem of loop current, so that the torque fluctuation is increased, and the noise is higher; and the existing motor stator needs to adopt a gap bridge wire, and the local temperature of a stator winding is too high, so that the damage of the local temperature to the motor is increased.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a motor stator and a motor, which have simple structures, low cost, improved processing efficiency, no loop current of a stator winding, no need of a bridge wire and high local temperature.

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;

a stator winding including a plurality of phase windings mounted on a stator core and forming M layers in a radial direction of the stator core, M being a multiple of 4 or more;

each phase winding includes: the K first conductor groups, the second conductor groups, the 2K third conductor groups and the K fourth conductor groups are connected in parallel along the circumferential direction of the stator core, and K is an integer greater than or equal to 1;

the K first conductor groups are positioned on the Mth radial layer of the stator core, the K fourth conductor groups are positioned on the first radial layer of the stator core, and the 2K third conductor groups are positioned on the Mth/2 layer and the Mth/2 +1 layer which are adjacent to each other in the radial direction of the stator core; the plurality of second conductor groups are positioned on the N-th layer and the (N + 1) -th layer which are adjacent to each other in the radial direction of the stator core, and N is an odd number which is larger than or equal to 1.

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

Further, the first conductor group and the fourth conductor group have different structures, the first conductor group comprises the same first conductor, and the fourth conductor group comprises a fourth large conductor and a fourth small conductor.

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

Further, the second conductor group comprises the same second conductors, and the pitch of the second conductors is a full pitch, or the second conductor group comprises a second large conductor and a second small conductor, wherein the pitch of the second large conductor is a long pitch, and the pitch of the second small conductor is a short pitch.

Further, the third conductor group includes the same third conductor, and the pitch of the third conductor is a long pitch or the pitch of the third conductor is a short pitch.

Further, the third conductor group comprises 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, 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.

Furthermore, the phase winding further comprises a plurality of fifth conductor groups, the fifth conductor groups are located in the X-th layer and the X + 1-th layer which are radially adjacent to the stator core, X is an even number and is not equal to M/2, the fifth conductor groups comprise the same fifth conductor, or the fifth conductor groups comprise a fifth large conductor and a fifth small conductor.

Furthermore, the phase winding is provided with a plurality of first connecting welding ends and second connecting welding ends which are connected together, the welding ends positioned on the same radially adjacent Y-1 th layer of the stator core are the first connecting welding ends, the welding ends positioned on the same radially adjacent Y-1 th layer of the stator core are the second connecting welding ends, the sum of the span of the first connecting welding ends and the span of the second connecting welding ends is a whole pitch, and Y is an even number.

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 motor stator comprises: a stator core having a plurality of core slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; a stator winding including a plurality of phase windings mounted on a stator core and forming M layers in a radial direction of the stator core, M being a multiple of 4 or more; each phase winding includes: the K first conductor groups, the second conductor groups, the 2K third conductor groups and the K fourth conductor groups are connected in parallel along the circumferential direction of the stator core, and K is an integer greater than or equal to 1; the K first conductor groups are positioned on the Mth radial layer of the stator core, the K fourth conductor groups are positioned on the first radial layer of the stator core, and the 2K third conductor groups are positioned on the Mth/2 layer and the Mth/2 +1 layer which are adjacent to each other in the radial direction of the stator core; the plurality of second conductor groups are positioned on the N-th layer and the (N + 1) -th layer which are adjacent to each other in the radial direction of the stator core, and N is an odd number which is larger than or equal to 1. According to the technical scheme, the first conductor group and the fourth conductor group are adopted to realize local same layer, the number of turns of a magnetic circuit of the stator winding can be adjusted more flexibly, and each branch circuit does not need to use a bridge wire, so that the problem of overhigh local temperature is solved. Any two branch windings are rotationally symmetrical, and the problem of loop current of the existing stator winding is solved.

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 fourth 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 third embodiment of the present invention;

FIG. 5 is a schematic diagram of a second conductor set according to a fourth 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;

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 22B, 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 4 layers in the radial direction of the stator core; in addition, M may be a multiple of 4, 4 layers, 8 layers, 12 layers or more.

Referring to fig. 1 to 22B, 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 so as to be different from each other in electrical phase, and in the first to eleventh 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 is equal to 2 per pole (i.e., K is 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 and 12B, in the first embodiment, each phase winding (U-phase winding, V-phase winding, W-phase winding) includes 1 first conductor group, 12 second conductor groups, 2 third conductor groups, and 1 fourth conductor group, as shown in fig. 13A, 13B, 14A, and 14B, in the second embodiment and the third embodiment, each phase winding (U-phase winding, V-phase winding, W-phase winding) includes 2 first conductor groups, 8 second conductor groups, 4 third conductor groups, and 2 fourth conductor groups, and K is an integer greater than or equal to 1.

As shown in fig. 12A to 22B, in the first to eleventh embodiments, 1 first conductor group (or 2 first conductor groups) is located at the first radial layer of the stator core, 1 fourth conductor group 100 (or 2 fourth conductor groups 100) is located at the fourth radial layer of the stator core (M is equal to 8 in the tenth and eleventh embodiments), 2 third conductor groups (or 4 third conductor groups) is located at the 2 nd and 3 rd layers (M is equal to 8 in the tenth and eleventh embodiments, and third conductor groups is located at the 4 th and 5 th layers) adjacent to the stator core in the radial direction, and 12 second conductor groups (or 8 second conductor groups) is located at the 1 st and 2 nd, 3 rd and 4 th layers adjacent to the stator core in the radial direction, and N is equal to 1 and 3. The first conductor group and the fourth conductor group are adopted to realize local homostorey, so that the number of turns of a magnetic circuit of the stator winding can be adjusted more flexibly, and each branch circuit does not need to use a bridge wire, thereby solving the problem of over-high local temperature. Any two branch windings are rotationally symmetrical, and the problem of loop current of the existing stator winding is solved.

As shown in fig. 3 and fig. 12A to fig. 13B, in the first to second embodiments, the first conductor group includes a fourth large conductor 1000A and a fourth small conductor 1000B, the fourth large conductor 1000A of the first conductor group is located in the 26 th slot and the 33 th slot of the fourth layer in the radial direction of the stator core, the pitch of the fourth large conductor 1000A of the first conductor group is long pitch 7, the fourth small conductor 1000B of the first conductor group is located in the 27 th slot and the 32 th slot of the fourth layer in the radial direction of the stator core, and the pitch of the fourth small conductor 1000B of the first conductor group is short pitch 5; the fourth conductor group 100 comprises a fourth large conductor 1000A and a fourth small conductor 1000B, the fourth large conductor 1000A of the fourth 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 fourth large conductor 1000A of the fourth conductor group is long pitch, the fourth small conductor 1000B of the fourth 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 fourth small conductor 1000B of the fourth conductor group is short pitch; that is, the pitch of the fourth large conductor of the first conductor group is the same as the pitch of the fourth large conductor of the fourth conductor group, and the pitch of the fourth small conductor of the first conductor group is the same as the pitch of the fourth small conductor of the fourth conductor group, with the difference that the out-of-slot weld ends of the conductors of the first conductor group and the out-of-slot weld ends of the conductors of the fourth conductor group are different in the extending direction of the stator core in the circumferential direction.

Further, as shown in fig. 12A and 12B, in the first embodiment, when K is equal to 1, each phase winding includes 1 first conductor group 100, 12 second conductor groups (24 second conductor groups), 2 third conductor groups 350(300), and 1 fourth conductor group 100 connected in parallel along a stator core circumferential direction 2 branches; as shown in fig. 13A and 13B, in the second embodiment, when K is equal to 2, each phase winding includes 2 first conductor sets 100, 8 second conductor sets, 4 third conductor sets 350(300), and 2 fourth conductor sets 100 connected in parallel along a stator core circumferential direction 4 branches.

As shown in fig. 3, 4, and 14A to 22B, in the eleventh embodiment, the first conductor group 150 includes two first conductors 1500, the first conductor 1500 of the first conductor group 150 is located in the 32 th slot and the 38 th slot of the fourth layer in the radial direction of the stator core, the pitch of the first conductor 1500 of the first conductor group 150 is a full pitch 6, the first conductor 1500 of the first conductor group 150 is located in the 33 rd slot and the 39 th slot of the fourth layer in the radial direction of the stator core, and the pitch of the first conductor 1500 of the first conductor group is a full pitch 6; the fourth conductor group 100 comprises a fourth large conductor 1000A and a fourth small conductor 1000B, the fourth large conductor 1000A of the fourth conductor group 100 is located in the 25 th slot and the 32 th slot of the first radial layer of the stator core, the pitch of the fourth large conductor 1000A of the fourth conductor group 100 is long pitch, the fourth small conductor 1000B of the fourth conductor group 100 is located in the 26 th slot and the 31 th slot of the first radial layer of the stator core, and the pitch of the fourth small conductor 1000B of the fourth 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 fourth large conductor 1000A of the fourth conductor group 100, and the pitch of the first conductor 1500 of the first conductor group 150 is different from the pitch of the fourth small conductor 1000B of the fourth 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 fourth 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. 14A and 14B, in the third embodiment, when K is equal to 2, each phase winding includes 2 first conductor sets 150, 8 second conductor sets, 4 third conductor sets 350(300), and 2 fourth conductor sets 100 connected in parallel along the stator core circumferential direction 2 branch.

As shown in fig. 6, 12A to 14B, and 16A to 22B, in the first to third embodiments and the fifth to eleventh embodiments, the second conductor group includes the same second conductor 2500, specifically, in conjunction with fig. 12A and 12B, the first second conductor 2500 of the second conductor group 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 group 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. 5, 15A, and 15B, in the fourth 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 37 th slot of the 1 st layer and the 44 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 38 th slot of the 1 st layer and the 43 th slot of the 2 nd layer of the stator core, that is, the pitch of the second large conductor of the second conductor group is long pitch 7, and the pitch of the second small conductor of the second conductor group is short pitch 5.

As shown in fig. 6 and fig. 12A to 15B, in the first to fourth embodiments, the third conductor group 350 includes two third conductors 2500, specifically, a first third conductor 2500 of the third conductor group 350 is located in the 20 th slot of the 3 rd layer and the 25 th slot of the 2 nd layer of the stator core, and a second third conductor 2500 of the third conductor group 350 is located in the 21 st slot of the 3 rd layer and the 26 th slot of the 2 nd layer of the stator core, that is, the pitch of the third conductors of the third conductor group is the short pitch 5.

Alternatively, as shown in fig. 6, in the first to fourth embodiments, the pitch of the two third conductors 2500 included in the third conductor group 350 may also be a long pitch 7, specifically, in a fifth embodiment, referring to fig. 16A and 16B, the first third conductor 2500 of the third conductor group 350 is located in the 7 th slot of the 3 rd layer and the 14 th slot of the 2 nd layer of the stator core, and the second third conductor 2500 of the third conductor group 350 is located in the 8 th slot of the 3 rd layer and the 15 th slot of the 2 nd layer of the stator core, that is, the pitch of the third conductor group 350 is the long pitch 7.

Alternatively, as shown in fig. 5, in the first to fourth embodiments, the third conductor group may also include a third large conductor 2000A and a third small conductor 2000B, specifically, with reference to fig. 17A and 17B, in the sixth embodiment, the third large conductor 2000A of the third conductor group 300 is located in the 8 th slot of the 3 rd layer and the 14 th slot of the 2 nd layer of the stator core, the third small conductor 2000B of the third conductor group 300 is located in the 9 th slot of the 3 rd layer and the 13 th slot of the 2 nd layer of the stator core, that is, the pitch of the third large conductor 2000A of the third conductor group is a full pitch 6, and the pitch of the third small conductor 2000B of the third conductor group is a short pitch 4.

Alternatively, as shown in fig. 5, in the first to fourth embodiments, the third conductor group may also include a third large conductor 2000A and a third small conductor 2000B, specifically, with reference to fig. 18A and 18B, in the seventh embodiment, the third large conductor 2000A of the third conductor group 300 is located in the 7 th slot of the 3 rd layer and the 15 th slot of the 2 nd layer of the stator core, the third small conductor 2000B of the third conductor group 300 is located in the 8 th slot of the 3 rd layer and the 14 th slot of the 2 nd layer of the stator core, that is, the pitch of the third large conductor 2000A of the third conductor group is the long pitch 8, and the pitch of the third small conductor 2000B of the third conductor group is the full pitch 6.

Alternatively, as shown in fig. 5 and 6, in the fourth embodiment, one third conductor group 300 in the phase winding may include a third large conductor 2000A and a third small conductor 2000B, and another third conductor group 350 in the phase winding may also include two third conductors 2500, specifically, in combination with fig. 19A and 19B, in the eighth embodiment, the third large conductor 2000A of the first third conductor group 300 is located in the 2 nd slot and the 8 th slot of the 2 nd layer of the stator core 3 rd layer, the third small conductor 2000B of the third conductor group 300 is located in the 3 rd slot and the 7 th slot of the 2 nd layer of the stator core 3 rd layer, that is, the pitch of the third large conductor 2000A of the third conductor group is a full pitch 6, and the pitch of the third small conductor 2000B of the third conductor group is a short pitch 4; the first third conductor 2500 of the second third conductor set 350 is located in the 8 th slot of the 3 rd layer of the stator core and the 13 th slot of the 2 nd layer, and the second third conductor 2500 of the second third conductor set 350 is located in the 9 th slot of the 3 rd layer of the stator core and the 14 th slot of the 2 nd layer of the stator core, namely, the pitch of the third conductor 2500 of the second third conductor set 350 is the short pitch 5.

Alternatively, as shown in fig. 5 and 6, in the fourth embodiment, one third conductor group 300 in the phase winding may include a third large conductor 2000A and a third small conductor 2000B, and another third conductor group 350 in the phase winding may include two third conductors 2500, specifically, in combination with fig. 20A and 20B, in the ninth embodiment, the third large conductor 2000A of the first third conductor group 300 is located in the 1 st slot and the 9 th slot of the 2 nd layer of the stator core at the 3 rd layer, and the third small conductor 2000B of the third conductor group 300 is located in the 2 nd slot and the 8 th slot of the 2 nd layer of the stator core at the 2 nd 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 third conductor 2500 of the second third conductor set 350 is located in the 7 th slot of the 3 rd layer of the stator core and the 14 th slot of the 2 nd layer, and the second third conductor 2500 of the second third conductor set 350 is located in the 8 th slot of the 3 rd layer of the stator core and the 15 th slot of the 2 nd layer of the stator core, namely, the pitch of the third conductor 2500 of the second third conductor set 350 is the long pitch 7.

Optionally, as shown in fig. 21A, 21B, 22A, and 22B, in the tenth embodiment and the eleventh embodiment, each phase winding further includes: the 4 fifth conductor sets (the number of the fifth conductor sets is related to the value of M) the fifth conductor set 450 comprises two conductors, 2 fifth conductor sets are positioned on the 2 nd layer and the 3 rd layer which are adjacent to the stator core in the radial direction, 2 fifth conductor sets are positioned on the 6 th layer and the 7 th layer which are adjacent to the stator core in the radial direction, the embodiment is ten-fold equivalent to adding 4 layers on the basis of the third embodiment, in the first to second embodiments and the fourth to ninth embodiments, the fifth conductor set may be included, or the fifth conductor set may not be included as in the first to second embodiments and the fourth to ninth embodiments, two slot interiors of the first fifth conductor of the fifth conductor set 450 are located in the core slots 2 and 8, two slot interiors of the second fifth conductor of the fifth conductor set 450 are located in the core slots 3 and 9, that is, the pitch between the two groove interiors of the two fifth conductors of the fifth conductor group 450 is the full pitch 6;

with reference to fig. 12A to 20B, in the first to ninth embodiments, the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding terminals and second connection welding terminals connected together, the welding terminal located at the first layer in the radial direction of the stator core is the first connection welding terminal, the welding terminal located at the second layer in the radial direction of the stator core is the second connection welding terminal, the welding terminal located at the third layer in the radial direction of the stator core is the first connection welding terminal, the welding terminal located at the fourth layer in the radial direction of the stator core is the second connection welding terminal, and the sum of the span of the first connection welding terminals and the span of the second connection welding terminals adjacent to each other in the same radial direction of the stator core is a whole pitch; specifically, the pitch of connecting the first connecting welding end of one first conductor or one fourth large conductor or one fourth small conductor or one second large conductor or one second small conductor or one second large conductor or one third small conductor of the same radial fourth layer of the stator core with the second connecting welding end of one second conductor or one second large conductor or one second small conductor or one third large conductor or one third small conductor of the same radial adjacent third layer of the stator core is a whole pitch, and the first connecting welding end of the other welding end of one second conductor or one second large conductor or one second small conductor or one third large conductor or one third small conductor of the same radial second layer of the stator core is connected with the second connecting welding end of one second large conductor or one second small conductor or one second conductor or one fourth large conductor or one fourth small conductor of the same radial adjacent first layer of the stator core The pitch at which the second connection solder terminal of the one solder terminal is connected is a full pitch.

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;

a stator winding including a plurality of phase windings mounted on the stator core and forming M layers in a radial direction of the stator core, where M is a multiple of 4 or more;

the method is characterized in that: each of the phase windings includes: the K first conductor groups, the second conductor groups, the 2K third conductor groups and the K fourth conductor groups are connected in parallel along the circumferential direction of the stator core, and K is an integer greater than or equal to 1;

the K first conductor groups are located on the radial Mth layer of the stator core, the K fourth conductor groups are located on the radial first layer of the stator core, and the 2K third conductor groups are located on the radial adjacent Mth/2 layer and the Mth/2 +1 layer of the stator core; the plurality of second conductor groups are positioned on the N-th layer and the (N + 1) -th layer which are adjacent to each other in the radial direction of the stator core, and N is an odd number which is larger than or equal to 1.

2. The electric machine stator of claim 1, wherein the first conductor set and the fourth conductor set are identical in structure, each of the first and fourth conductor sets including a fourth large conductor and a fourth small conductor.

3. The electric machine stator of claim 1, wherein the first conductor set and the fourth conductor set are different structures, the first conductor set comprising the same first conductor, the fourth conductor set comprising a fourth large conductor and a fourth small conductor.

4. The electric machine stator of claim 3, wherein when K equals 2, each of the phase windings comprises 2 first conductor sets, a plurality of second conductor sets, 4 third conductor sets, and 2 fourth conductor sets connected in parallel along 2 legs in a circumferential direction of the stator core.

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

6. The stator according to any one of claims 1 to 5, wherein the second conductor group includes the same second conductors, and the pitch of the second conductors is a full pitch, or the second conductor group includes a second large conductor and a second small conductor, and the pitch of the second large conductor is a long pitch and the pitch of the second small conductor is a short pitch.

7. The electric machine stator of any one of claims 1 to 5, wherein the third conductor set comprises identical third conductors, the pitch of the third conductors being a long pitch or the pitch of the third conductors being a short pitch.

8. The stator according to any one of claims 1 to 5, wherein the third conductor group includes a third large conductor and a third small conductor, and the pitch of the third large conductor of the third conductor group is a long pitch and the pitch of the third small conductor of the third conductor group is a full 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.

9. The electric machine stator of any one of claims 1 to 5, wherein the phase winding further comprises a plurality of fifth conductor sets, the plurality of fifth conductor sets are located in the X-th layer and the X + 1-th layer which are radially adjacent to the stator core, X is an even number and X is not equal to M/2, the fifth conductor sets comprise the same fifth conductor, or the fifth conductor sets comprise a fifth large conductor and a fifth small conductor.

10. The motor stator according to any one of claims 1 to 5, wherein the phase winding has a plurality of first connection weld terminals and second connection weld terminals connected together, the weld terminals located on the same radially adjacent Y-1 th layer of the stator core are the first connection weld terminals, the weld terminals located on the same radially adjacent Y-th layer of the stator core are the second connection weld terminals, the sum of the span of the first connection weld terminals and the span of the second connection weld terminals is a whole pitch, and Y is an even number.

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

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