CN112821598A

CN112821598A - Motor stator and motor

Info

Publication number: CN112821598A
Application number: CN202110167753.1A
Authority: CN
Inventors: 张凯
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Tianjin Songzheng Auto Parts Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-05-18

Abstract

The invention provides a motor stator and a motor, comprising: the stator winding comprises two first conductor groups, a plurality of second conductor groups and a plurality of third conductor groups which are connected in series; the first conductor set includes: the first conductor group is positioned on the first layer and the Mth layer of the stator core in the radial direction; according to the technical scheme of the motor stator in the application embodiment, a bus bar connected in series among the windings of each phase in the related technology is omitted, the first conductor group, the second conductor group, the third conductor group and the fourth conductor group of the windings of each phase can be directly connected, each phase of winding and a neutral point can be arranged in any slot and any layer of the winding, the complexity of the manufacturing process is reduced, the production cost is reduced, the material cost is reduced, and the processing efficiency is improved.

Description

Motor stator and motor

Technical Field

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

Background

The stator winding comprises a plurality of hairpin conductors, and a plurality of types of hairpin conductors, including U-shaped conductors and S-shaped conductors, penetrate into a slot of a stator core according to a certain arrangement mode to form a three-phase winding of a required motor;

in the prior art, more than 90% of stator windings are all provided with the number of slots of each pole and each phase being more than or equal to 2, but if the stator windings are connected in series among phases, the twisting directions of the welding ends in the same layer of slots or the distances among the twisting slots are inconsistent, the manufacturing process is complex, the forming is difficult, the production cost is high, and the processing efficiency is low.

Disclosure of Invention

The invention mainly aims to provide a motor stator and a motor, which adopt few types of conductors and are simple in arrangement mode, bus bars and bus bars can be omitted, so that the twisting direction and the twisting slot pitch of welding end parts extending in slots positioned in the same radial layer in a stator slot are consistent, lead ends and neutral points among windings of each phase are arranged in any layer of slots in the same radial direction, the complexity of a manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

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

the stator winding comprises a plurality of phase windings arranged on a stator core, and each slot is divided into M layers by the number of the slots which can be accommodated in the radial direction of the stator core, wherein M is an even number which is more than or equal to 4;

each phase winding comprises two first conductor groups, a plurality of second conductor groups and a plurality of third conductor groups which are connected in series;

the first conductor set includes: the stator core comprises a stator core, a first large conductor, a first small conductor and a second large conductor, wherein the first large conductor, the first small conductor and the second small conductor are arranged in a first layer and an Mth layer of the stator core in the radial direction, and each conductor of the first conductor group comprises two slot inner parts which are arranged in different slots of the same layer of the stator core in the radial direction, a wire inserting end which is arranged outside the slots and two welding ends which are arranged outside the slots and have the same extending direction;

a first large conductor of a first conductor group of each phase winding surrounds a first small conductor, the first conductor of the first conductor group positioned on the Mth layer in the radial direction of the stator core is positioned on one side of the circumferential direction of the stator core of the first large conductor and the first small conductor of the first conductor group, and the first conductor of the first conductor group positioned on the first layer in the radial direction of the stator core is positioned on the other side of the circumferential direction of the stator core of the first large conductor and the first small conductor of the first conductor group;

the first conductor group located on the radial first layer of the stator core and the first conductor group located on the radial fourth layer of the stator core are arranged adjacently along the circumferential direction of the stator core.

Further, the third conductor set includes: the same third conductor, and/or different third large conductor and third small conductor, each conductor of the third conductor group is respectively positioned in the (N +1) th layer and the (N +2) th layer which are radially adjacent to the stator core, wherein N is an odd number;

the third conductor group and the first conductor group are located in the same radial direction of the stator core.

Further, the second conductor set of each phase winding includes: a second large conductor, a second conductor and a second small conductor; each conductor of the second conductor set is respectively positioned on the Nth layer and the (N +1) th layer which are radially adjacent to the stator core.

Furthermore, a second large conductor of the second conductor group of each phase winding surrounds a second small conductor, the second conductor of one of the second conductor groups in two radially adjacent second conductor groups of each phase winding is positioned on one side of the stator core in the circumferential direction of the stator core of the second large conductor and the second small conductor of the second conductor group, the second conductor group is positioned on the M/2 th layer and the M/2-1 th layer in the radial direction of the stator core, the second conductor of the other one of the two radially adjacent second conductor groups of the stator core in each phase winding is positioned on the other side of the stator core in the circumferential direction of the second large conductor and the second small conductor of the second conductor group, and the second conductor group is positioned on the M/2+1 th layer and the M/2+2 th layer in the radial direction of the stator core.

Further, the second conductor set of each phase winding includes: three identical second conductors, each conductor of the second conductor set being located in the nth and N +1 th layers of the stator core, respectively, which are radially adjacent, or the second conductor set of each phase winding including: two second large conductors and one second small conductor, each conductor of the second conductor group being located in the nth and N +1 th layers radially adjacent to the stator core, respectively, or the second conductor group of each phase winding comprising: each conductor of the second conductor group is respectively positioned in the N layer and the N +1 layer which are radially adjacent to the stator core.

Further, the at least one second conductor set of each phase winding includes: a second large conductor, a second conductor and a second small conductor; each conductor of the second conductor set is respectively positioned on the Nth layer and the (N +1) th layer which are radially adjacent to the stator core.

Further, the at least one second conductor set of each phase winding includes: three identical second conductors, each conductor of the second conductor set being located in respective N-th and N + 1-th radially adjacent layers of the stator core, or at least one second conductor set of each phase winding comprising: two second large conductors and one second small conductor, each conductor of the second conductor set being located in the nth and N +1 th layers radially adjacent to the stator core, respectively, or at least one second conductor set of each phase winding comprising: each conductor of the second conductor group is respectively positioned in the N layer and the N +1 layer which are radially adjacent to the stator core.

Furthermore, the phase winding is provided with a plurality of connecting and welding ends, the connecting and welding ends are formed by connecting the welding ends of the M-1 th layer and the welding ends of the M-th layer which are positioned on the same radial direction of the stator core and adjacent to each other, the pitches of the plurality of connecting and welding ends of the phase winding are the same, and M is an even number.

Furthermore, the phase winding is provided with an extension end connected with the lead wire and an extension end connected with the outgoing wire, and the extension ends of the lead wire and the outgoing wire are positioned on two layers of radial adjacent stator cores; the extending end of the lead is positioned on the radial M-1 th layer of the stator core, the extending end of the outgoing line is positioned on the radial M-1 th layer of the stator core, or the extending end of the lead is positioned on the radial M-1 th layer of the stator core, and the extending end of the outgoing line is positioned on the radial M-1 th layer of the stator core.

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 invention, the motor stator comprises: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; the stator winding comprises a plurality of phase windings arranged on a stator core, and each slot is divided into M layers by the number of the slots which can be accommodated in the radial direction of the stator core, wherein M is an even number which is more than or equal to 4; each phase winding comprises two first conductor groups, a plurality of second conductor groups and a plurality of third conductor groups which are connected in series; the first conductor set includes: the stator core comprises a stator core, a first large conductor, a first small conductor and a second large conductor, wherein the first large conductor, the first small conductor and the second small conductor are arranged in a first layer and an Mth layer of the stator core in the radial direction, and each conductor of the first conductor group comprises two slot inner parts which are arranged in different slots of the same layer of the stator core in the radial direction, a wire inserting end which is arranged outside the slots and two welding ends which are arranged outside the slots and have the same extending direction; a first large conductor of a first conductor group of each phase winding surrounds a first small conductor, the first conductor of the first conductor group positioned on the Mth layer in the radial direction of the stator core is positioned on one side of the circumferential direction of the stator core of the first large conductor and the first small conductor of the first conductor group, and the first conductor of the first conductor group positioned on the first layer in the radial direction of the stator core is positioned on the other side of the circumferential direction of the stator core of the first large conductor and the first small conductor of the first conductor group; the first conductor group located on the radial first layer of the stator core and the first conductor group located on the radial fourth layer of the stator core are arranged adjacently along the circumferential direction of the stator core. The above-mentioned technical scheme of adoption of this application, the kind of the conductor of adoption is few, and the mode of arranging is simple, can cancel busbar and busbar for the welding tip distortion direction that is located the inslot portion extension of stator inslot radial same layer is unanimous with the distortion groove pitch, realizes that lead terminal and neutral point between each phase winding set up in any one layer of same radial arbitrary groove, reduces the preparation technology complexity, reduction in production cost, improvement machining efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. 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 according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a conductor of a first conductor set located at a first radial layer of a stator core in an embodiment of the present invention;

fig. 4 is a schematic structural view of a conductor of the first conductor group located at the mth layer in the radial direction of the stator core in the embodiment of the invention;

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

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

FIG. 7 is a schematic diagram of the structure of the conductors in the second conductor set according to the third embodiment of the present invention;

fig. 8 is a schematic structural diagram of a conductor of the second conductor set in the fifth embodiment of the present invention;

fig. 9 is a schematic structural view of a conductor of the second conductor set in the eleventh embodiment of the invention;

FIG. 10 is a schematic diagram of a third conductor set according to a second embodiment of the present invention;

FIG. 11 is a schematic diagram of a third conductor set according to a first embodiment of the present invention;

fig. 12 is a schematic diagram of the structure of the conductor of the third conductor set in the tenth embodiment of the present invention;

FIG. 13 is a schematic plan view of the bobbin in the phase winding according to one embodiment of the present invention;

FIG. 14 is a schematic plan view showing the development of the plug terminal in the phase winding according to the second embodiment of the present invention;

FIG. 15 is a schematic plan view of the bobbin in the phase winding according to the third embodiment of the present invention;

fig. 16 is a schematic plan view showing the development of the plug terminal in the phase winding in the fourth embodiment of the present invention;

FIG. 17 is a schematic plan view of the bobbin end in the phase winding in accordance with the fifth embodiment of the present invention;

fig. 18 is a schematic plan view of the plug end in the phase winding in the sixth embodiment of the invention;

FIG. 19 is a schematic diagram showing the planar development of the plug end in the phase winding in the seventh embodiment of the present invention;

fig. 20 is a schematic plan view showing the development of the plug terminal in the phase winding in the eighth embodiment of the present invention;

fig. 21 is a schematic plan view of the plug end in the phase winding in the ninth embodiment of the invention;

fig. 22 is a schematic plan view of the weld side of the phase winding in one to nine embodiments of the present invention;

FIG. 23 is a schematic diagram illustrating the connection of the windings of each phase according to an embodiment of the present invention;

FIG. 24 is a schematic diagram of another connection scheme for the phase windings in accordance with 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 invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not 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 invention 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; it should be noted that the first layer of the radial inner layer of the stator core in the present application may be the first layer of the inner layer in the direction away from the central axis of the stator core, and may also be the first layer of the inner 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 having a plurality of slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

as shown in fig. 1 to 2, 13 to 22, 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 and form an even number of layers in the radial direction of the stator core 20, forms 4 layers in the radial direction of the stator core for the phase windings (U-phase winding or V-phase winding or W-phase winding) in the present embodiment; the even number layers may be four, six, eight, or more even number layers. The motor stator in the embodiment is a motor stator in the hair pin motor.

Referring to fig. 13 to 22, in the stator winding 10 in the first to eleventh embodiments of the present embodiment, the stator winding 10 is mounted on the stator core 20, that is, a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, wherein the stator winding 10 is a three-phase (i.e., U-phase winding, V-phase winding, W-phase winding) winding, and each phase slot of each pole is equal to or equal to 3; three slots 21 are provided for each magnetic pole of the rotor, the number of slots per pole per phase being 3 in the present embodiment, the rotor has six magnetic poles and is such that the number of slots 21 provided in the stator core 20 is equal to 54 (i.e., 3X6X3) for each phase of the three-phase stator winding 10, and each phase winding (U-phase winding, V-phase winding, W-phase winding) includes 2 first conductor groups, 8 second conductor groups, and 2 third conductor groups connected in series in the present embodiment;

further, in the present embodiment, the stator core 20 is formed by stacking a plurality of annular magnetic steel plates to form the stator core axial direction both end faces 25, 26 of the stator core 20 by defining one tooth portion 22 by two adjacent slots 21, and other conventional metal plates may be used instead of the magnetic steel plates.

As shown in fig. 3 to 4, and 13 to 22, in an embodiment, the first conductor set includes: three different conductors, a first large conductor 1000-a, a first conductor 1000, a first small conductor 1000-B, each conductor of the first conductor group comprises two slot interiors 301 located inside different slots 21 of the same radial layer of the stator core, a wire inserting end 302 located outside the slots 21, the wire inserting end 302 located at the axial outer 25 end of the slots 21 and connected with the two slot interiors 301 of the conductor, two welding ends 303 located outside the slots and extending in the same direction (both towards the left), the two welding ends 303 located at the axial outer 26 end of the slots 21 and respectively connected with the two slot interiors 301 of the conductor in the same layer, the two slot interiors of each conductor of the first large conductor 1000-a, the first conductor 1000 and the first small conductor 1000-B of the first conductor group are located at the first radial layer and the M-th radial layer of the stator core, namely, each phase winding is provided with two first conductor groups, wherein the conductors of one first conductor group are located at the first radial layer of the stator core, wherein the conductor of the other first conductor group is located at the mth layer (M is 4 in this embodiment) in the radial direction of the stator core, with reference to fig. 3, the two slots of the first large conductor 1000-a of the first conductor group 100-1 located at the first layer in the radial direction of the stator core are located at the 19 th slot and the 29 th slot in the circumferential direction of the stator core, the two slots of the first small conductor 1000-B of the first conductor group 100-1 are located at the 20 th slot and the 28 th slot in the circumferential direction of the stator core, and the two slots of the first conductor 1000 of the first conductor group 100-1 are located at the 21 st slot and the 30 th slot in the circumferential direction of the stator core; referring to fig. 4, two slot interiors of the first large conductor 1000-a of the first conductor group 100-2 located at the fourth layer in the radial direction of the stator core are located at the 29 th slot and the 39 th slot in the circumferential direction of the stator core, two slot interiors of the first small conductor 1000-B of the first conductor group 100-2 are located at the 30 th slot and the 38 th slot in the circumferential direction of the stator core, and two slot interiors of the first conductor 1000 of the first conductor group 100-2 are located at the 28 th slot and the 37 th slot in the circumferential direction of the stator core; that is, a first large conductor 1000-A on the first radial layer of the stator core surrounds a first small conductor 1000-B, a first large conductor 1000-A on the fourth radial layer of the stator core surrounds a first small conductor 1000-B, a first conductor 1000 of a first conductor group 100-2 on the fourth radial layer of the stator core is located on the left circumferential side of the stator core of the first large conductor 1000-A and the first small conductor 1000-B of the first conductor group 100-2, a first conductor 1000 of the first conductor group 100-1 on the first radial layer of the stator core is located on the right circumferential side of the stator core of the first large conductor 1000-A and the first small conductor 1000-B of the first conductor group 100-1, and a first conductor group of the first radial layer of the stator core is located on the 19 th, 20 th, 21 th, 28 th, sixth, seventh, and eighth circumferential slots of the stator core, 29. 30 slots, the first conductor group positioned at the fourth layer in the radial direction of the stator core is positioned at the circumferential 28 th, 29 th and 30 th slots of the stator core, and the 37 th, 38 th and 39 th slots, namely the first conductor group 100-1 positioned at the first layer in the radial direction of the stator core 20 and the first conductor group 100-2 positioned at the fourth layer in the radial direction of the stator core are arranged adjacently along the circumferential direction of the 28 th, 29 th and 30 th slots of the stator core. According to the technical scheme of the motor stator in the embodiment, the bus bar connected in series among the windings of all phases in the related technology is omitted, the first conductor group, the second conductor group and the third conductor group of all phases can be directly connected, each phase of winding and a neutral point can be arranged in any layer of any slot and any layer of any winding, the complexity of the manufacturing process is reduced, the production cost is reduced, the material cost is reduced, and the processing efficiency is improved. Therefore, the technical scheme of the embodiment of the application effectively solves the problems of complex manufacturing process, high production cost and low processing efficiency of the hairpin winding in the related technology.

As shown in fig. 13 to 22, in the first embodiment, the fourth embodiment, the sixth embodiment, the seventh embodiment, and the ninth embodiment, the third conductor set includes: each of the three large conductors 3000-a and 3000-B of the third conductor group comprises two slot interiors 301 located inside two radially adjacent layers of different slots of the stator core, a wire inserting end 302 located outside the slot 21, a wire inserting end 302 located 25 axially outside the slot 21 and connected with the two slot interiors 301 of the conductor, two welding ends 303 located outside the slot and extending in opposite directions (the extending directions of the two welding ends are opposite), the two welding ends 303 located 26 axially outside the slot 21 and connected with the two slot interiors 301 of the conductor in the same layer, and the two slot interiors of each conductor of the third conductor group are located on the 2 nd layer and the 3 rd layer which are radially adjacent to the stator core; the two slot interiors of the first third large conductor 3000-A of the third conductor set are located in the stator core slots 19, 29, the two slot interiors of the second third large conductor 3000-A are located in the stator core slots 20, 30, the two slot interiors of the third small conductor 3000-B are located in the stator core slots 21, 28, the two slot interiors of the first third large conductor 3000-A of the second third conductor set are located in the stator core slots 28, 38, the two slot interiors of the second third large conductor 3000-A are located in the stator core slots 29, 39, the two slot interiors of the third small conductor 3000-B are located in the stator core slots 30, 37, the first third conductor set is located in the stator core circumferential core slots 19, 20, 21 and the core slots 28, 29, 30, and the first conductor set located in the first layer in the radial direction of the stator core is located in the stator core circumferential core slots 19, 20, 21 and the core slots 28, 29. 30 are located in the same radial direction, the second third conductor set is located in the stator core circumferential core slots 28, 29, 30 and the core slots 37, 38, 39 and the first conductor set located in the fourth radial layer of the stator core is located in the stator core circumferential core slots 28, 29, 30 and the core slots 37, 38, 39 are located in the same radial direction.

As shown in fig. 12, in an embodiment ten, the third conductor set includes: each of the third large conductor 3000-a and the third small conductor 3000-B of the third conductor group comprises two slot interiors 301 located inside two radially adjacent layers of different slots of the stator core, a wire inserting end 302 located outside the slot 21 and connected with the two slot interiors 301 of the conductor at the axially outer 25 end of the slot 21, two welding ends 303 located outside the slot and extending in opposite directions (the extending directions of the two welding ends are opposite), the two welding ends 303 located outside the slot 21 and extending in the axially outer 26 end are respectively connected with the two slot interiors 301 of the conductor in the same layer, and the two slot interiors of each conductor of the third conductor group are located on the radially adjacent 2 nd layer and 3 rd layer of the stator core; the two slot interiors of the third large conductor 3000-A of the third conductor set are located in the stator core slots 19, 30, the two slot interiors of the first third small conductor 3000-B are located in the stator core slots 20, 28, the two slot interiors of the second third small conductor 3000-B are located in the stator core slots 21, 29, the two slot interiors of the third large conductor 3000-A of the second third conductor set are located in the stator core slots 28, 39, the two slot interiors of the first third small conductor 3000-B are located in the stator core slots 29, 37, the two slot interiors of the second third small conductor 3000-B are located in the stator core slots 30, 38, the first third conductor set is located in the stator core circumferential core slots 19, 20, 21 and the core slots 28, 29, 30 and the first conductor set located in the first layer in the radial direction of the stator core is located in the stator core circumferential core slots 19, 20, 21 and the core slots 28, 28, 29. 30 are located in the same radial direction, the second third conductor set is located in the stator core circumferential core slots 28, 29, 30 and the core slots 37, 38, 39 and the first conductor set located in the fourth radial layer of the stator core is located in the stator core circumferential core slots 28, 29, 30 and the core slots 37, 38, 39 are located in the same radial direction.

As shown in fig. 13 to 22, in the second embodiment, the third embodiment, the fifth embodiment, the sixth embodiment and the eighth embodiment, the third conductor set includes: the same third conductor 3000, each of the third conductors 3000 of the third conductor group includes two slot interiors 301 located inside two radially adjacent layers of different slots of the stator core, a wire insertion end 302 located outside the slot 21, the wire insertion end 302 located outside the axial outer 25 end of the slot 21 and connected to the two slot interiors 301 of the conductors, two welding ends 303 located outside the slot and extending in opposite directions (the extending directions of the two welding ends are opposite), the two welding ends 303 located at the axial outer 26 end of the slot 21 and connected to the two slot interiors 301 of the conductors in the same layer, and the two slot interiors of each of the conductors of the third conductor group are located at the 2 nd and 3 rd radially adjacent layers of the stator core; the two slot interiors of the first third conductor 3000 of the third conductor set are located in the stator core slots 19, 28, the two slot interiors of the second third conductor 3000 are located in the stator core slots 20, 29, the two slot interiors of the third conductor 3000 are located in the stator core slots 21, 30, the two slot interiors of the first third conductor 3000 of the second third conductor set are located in the stator core slots 28, 37, the two slot interiors of the second third conductor 3000 are located in the stator core slots 29, 38, the two slot interiors of the third conductor 3000 are located in the stator core slots 30, 39, the first third conductor set is located in the stator core circumferential core slots 19, 20, 21 and the core slots 28, 29, 30 and the first conductor set located in the first radial layer of the stator core is located in the stator core circumferential core slots 19, 20, 21 and the core slots 28, 29, 30, in the same radial direction, and the second third conductor set is located in the stator core circumferential core slots 28, 29, 30, 29. 30 and the core slots 37, 38, 39 are located in the same radial direction as the stator core circumferential core slots 28, 29, 30 and the core slots 37, 38, 39 with the first conductor set located in the fourth radial layer of the stator core.

In an embodiment six, in conjunction with fig. 18, each phase winding includes two third conductor sets, wherein one third conductor set includes: one third large conductor 3000-a and two third small conductors 3000-B, wherein another third conductor set comprises: each of the three third conductors 3000, each of the third large conductor 3000-a and the third small conductor 3000-B (the third conductor 3000) of the third conductor group includes two slot interiors 301 located inside two radially adjacent layers of different slots of the stator core, a wire insertion end 302 located outside the slot 21, the wire insertion end 302 located outside the slot 21 and axially outside 25 ends connected to the two slot interiors 301 of the conductor, two welding ends 303 located outside the slot and extending in opposite directions (the extending directions of the two welding ends are opposite), the two welding ends 303 located outside the slot 21 and axially outside 26 ends are respectively connected to the two slot interiors 301 of the conductor in the same layer, and the two slot interiors of each conductor of the third conductor group are located on the 2 nd layer and the 3 rd layer which are radially adjacent to the stator core; the two slot interiors of the third large conductor 3000-a of the third conductor set are located in the stator core slots 19, 30, the two slot interiors of the first third small conductor 3000-B are located in the stator core slots 20, 28, the two slot interiors of the second third small conductor 3000-B are located in the stator core slots 21, 29, the two slot interiors of the first third conductor 3000 of the second third conductor set are located in the stator core slots 28, 37, the two slot interiors of the second third conductor 3000 are located in the stator core slots 29, 38, the two slot interiors of the third conductor 3000 are located in the stator core slots 30, 39, the first third conductor set is located in the stator core circumferential core slots 19, 20, 21 and the core slots 28, 29, 30, and the first conductor set located in the first radial layer of the stator core is located in the same radial direction as the stator core circumferential core slots 19, 20, 21 and the core slots 28, 29, 30, the second third conductor group is located in the stator core circumferential iron core slots 28, 29 and 30 and the iron core slots 37, 38 and 39, and the first conductor group located in the fourth layer of the stator core in the radial direction is located in the same radial direction as the stator core circumferential iron core slots 28, 29 and 30 and the iron core slots 37, 38 and 39.

With reference to fig. 13 to 14, in the first to second embodiments, each phase winding includes 8 second conductor sets, each second conductor set includes one second large conductor 2000-a, one second conductor 2000, and one second small conductor 2000-B, two slots of the second large conductor 2000-a are located inside the 3 rd layer 2 nd slot and the 4 th layer 12 th slot in the radial direction of the stator core, in the first to second embodiments, the pitch of the second large conductor 2000-a is a long pitch 10), the two slot interiors of the second conductor 2000 are located in the 1 st slot and the 10 th slot of the 4 th layer in the radial direction of the stator core at the 3 rd layer (in the first to second embodiments, the pitch of the second conductor 2000 is a full pitch 9), and the two slot interiors of the second small conductor 2000-B are located in the 3 rd slot and the 11 th slot of the 4 th layer in the radial direction of the stator core (in the first to second embodiments, the pitch of the second small conductor 2000-B is a short pitch 8); each conductor (2000-A, 2000-B) of the 4 second conductor groups of the phase winding is respectively positioned at 3 layers and 4 layers which are radially adjacent to the stator core; each conductor (2000-a, 2000-B) of the other 4 second conductor sets of the phase winding is located in 1 and 2 radially adjacent layers of the stator core, respectively.

With reference to fig. 13 to 14, in the first to second embodiments, one second large conductor 2000-a of the second conductor set of each phase winding surrounds one second small conductor 2000-B, one second conductor set 200-2 (the second conductor 2000 located in the 1 st layer (M/2-1) and the 2 nd layer (M/2) in the radial direction of the stator core) of the two second conductor sets 200 adjacent to the stator core in each phase winding is located in the 1 st slot and the 10 th slot of the stator core, the second large conductor and the second small conductor of the second conductor set are located in the 2 nd slot, the 3 rd slot, the 11 th slot and the 12 th slot of the stator core, that is, the second conductor 2000 located in the 1 st layer and the 2 nd layer in the radial direction of the stator core is located on the circumferential side of the second large conductor and the second small conductor of the second conductor set 200-2, and the other second conductor set 200-1 in the radial direction of the stator core in each phase winding is located on the circumferential side of the second conductor set 200-1 of the two second conductor sets adjacent to the radial direction of the stator core The second conductors 2000 located at the radial 3 rd layer (M/2+1) and 4 th layer (M/2+2) of the stator core are located at the 3 rd slot and the 12 th slot of the stator core, and the second large conductor and the second small conductor of the second conductor group are located at the 1 st slot, the 2 nd slot, the 10 th slot and the 11 th slot of the stator core, that is, the second conductors 2000 located at the radial 3 rd layer and the 4 th layer of the stator core are located at the right side of the other circumferential side of the second large conductor and the second small conductor of the second conductor group 200-1.

Further, with reference to fig. 15 to 16, in the third to fourth embodiments, each phase winding further includes 8 second conductor groups 200-3, where each second conductor group 200-3 includes three identical second conductors 2000, two slot interiors of a first second conductor 2000 of the second conductor groups are located in the 1 st slot and the 4 th 10 th slot of the radial 3 rd layer of the stator core, two slot interiors of a second conductor 2000 are located in the 2 nd slot and the 4 th 11 th slot of the radial 3 rd layer of the stator core, and two slot interiors of a third second conductor 2000 are located in the 3 rd slot and the 4 th 12 th slot of the radial 3 th layer of the stator core (in the third to fourth embodiments, the pitch of the second conductor 2000 is the whole pitch 9); each conductor 2000 of the 4 second conductor sets of the phase winding is located in radially adjacent 3 and 4 layers of the stator core, respectively; each conductor 2000 of the other 4 second conductor sets 200-3 of the phase winding is located in the radially adjacent 1 and 2 layers of the stator core, respectively.

With reference to fig. 17-18, in embodiments five through six, each phase winding further includes 8 second conductor sets 200-4, the second conductor set 200-4 includes two second large conductors and one second small conductor, two of the first second large conductors 2000-a of the second conductor group are located in the 1 st slot and the 4 th slot of the radial 3 rd layer of the stator core, and two of the second large conductors 2000-a are located in the 2 nd slot and the 12 th slot of the radial 3 th layer of the stator core (in the fifth embodiment to the sixth embodiment, the pitch of the second large conductors 2000-a is long pitch 10), and two of the second small conductors 2000-B are located in the 3 rd slot and the 10 th slot of the radial 4 th layer of the stator core (in the fifth embodiment to the sixth embodiment, the pitch of the second small conductors 2000-B is short pitch 7); each conductor (2000-a, 2000-B) of the 4 second conductor sets 200-4 of the phase winding is located in 3 and 4 radially adjacent layers, respectively, of the stator core, and each conductor 2000 of the other 4 second conductor sets 200-4 of the phase winding is located in 1 and 2 radially adjacent layers, respectively, of the stator core. .

With reference to fig. 9, in the eleventh embodiment, each phase winding further includes 8 second conductor groups 200-5, where each second conductor group 200-5 includes one second large conductor and two second small conductors, two slots of one second large conductor 2000-a of the second conductor group are located inside the 1 st slot and the 4 th 12 th slot of the radial 3 rd layer of the stator core (in the eleventh embodiment, the pitch of the second large conductor 2000-a is a long pitch 11), two slots of the first second small conductor 2000-B are located inside the 2 nd slot and the 4 th slot of the radial 3 rd layer of the stator core (in the eleventh embodiment, the pitch of the second small conductor 2000-B is a short pitch 8); each conductor (2000-a, 2000-B) of the 4 second conductor sets 200-5 in the phase winding is located in 3 and 4 radially adjacent layers of the stator core, respectively, and each conductor (2000-a, 2000-B) of the other 4 second conductor sets 200-5 in the phase winding is located in 1 and 2 radially adjacent layers of the stator core, respectively.

With reference to fig. 19 to 21, in the seventh to ninth embodiments and the twelfth embodiment, each phase winding includes 4 second conductor sets 200-1 (of course, in the seventh to ninth embodiments and the twelfth embodiment, the second conductor set 200-1 may also be the second conductor set 200-2), the second conductor set 200-1 includes one second large conductor 2000-a, one second conductor 2000 and one second small conductor 2000-B, two slot interiors of the second large conductor 2000-a are located in the 1 st slot in the radial direction of the stator core and the 11 th slot in the radial direction of the stator core (in the seventh to ninth embodiments and the twelfth embodiments, the pitch of the second large conductor 2000-a is the long pitch 10), two slot interiors of the second conductor 2000 are located in the 3 rd slot in the radial direction of the stator core and the 12 th slot in the 2 nd layer (in the seventh to ninth embodiments and the twelfth embodiments, the pitch of the second conductor 2000 is a full pitch 9), and the two slots of the second small conductor 2000-B are positioned in the 1 st layer 2 nd slot and the 2 nd layer 10 nd slot in the radial direction of the stator core (in the seventh embodiment to the ninth embodiment and the twelfth embodiment, the pitch of the second small conductor 2000-B is a short pitch 8); each conductor (2000-a, 2000-B) of the second conductor set is located in radially adjacent 1 and 2 layers, respectively, of the stator core.

Further, with reference to fig. 20 and 21, in an eighth embodiment and a ninth embodiment, each phase winding further includes 4 second conductor groups 200-3, where the second conductor groups 200-3 include three identical second conductors 2000, two slot interiors of a first second conductor 2000 of the second conductor groups are located in the 1 st slot and the 4 th 10 th slot of the radial 3 rd layer of the stator core, two slot interiors of a second conductor 2000 are located in the 2 nd slot and the 4 th 11 th slot of the radial 3 rd layer of the stator core, and two slot interiors of a third second conductor 2000 are located in the 3 rd slot and the 4 th 12 th slot of the radial 3 rd layer of the stator core (in the eighth embodiment and the ninth embodiment, the pitch of the second conductor 2000 is a full pitch 9); each conductor (2000) of the second conductor set 200-3 is located in radially adjacent 3 and 4 layers, respectively, of the stator core.

Optionally, referring to fig. 19, in the seventh embodiment, each phase winding further includes 4 second conductor groups 200-4, where each second conductor group 200-4 includes two second large conductors and one second small conductor, two slot interiors of the first second large conductor 2000-a of the second conductor group are located in the 1 st slot and the 4 th 11 th slot of the radial 3 rd layer of the stator core, two slot interiors of the second large conductor 2000-a are located in the 2 nd slot and the 4 th slot of the radial 3 rd layer of the stator core (in the seventh embodiment, the pitch of the second large conductor 2000-a is long pitch 10), and two slot interiors of the second small conductor 2000-B are located in the 3 rd slot and the 4 th slot of the radial 3 rd layer of the stator core (in the seventh embodiment, the pitch of the second small conductor 2000-B is short pitch 7); each conductor (2000-a, 2000-B) of the second conductor set is located in radially adjacent 3 and 4 layers, respectively, of the stator core.

Optionally, referring to fig. 9, in a twelfth embodiment, each phase winding further includes 4 second conductor sets 200-5, where each second conductor set 200-5 includes one second large conductor and two second small conductors, two slot interiors of the one second large conductor 2000-a of the second conductor set are located in the 1 st slot and the 4 th 12 th slot of the radial 3 rd layer of the stator core (in the twelfth embodiment, the pitch of the second large conductor 2000-a is a long pitch 11), two slot interiors of the first second small conductor 2000-B are located in the 2 nd slot and the 4 th slot of the radial 3 rd layer of the stator core (in the twelfth embodiment, the pitch of the first second small conductor 2000-B is a long pitch 11), and two slot interiors of the second small conductor 2000-B are located in the 3 rd slot and the 4 th slot of the radial 3 rd layer of the stator core (in the twelfth embodiment, the pitch of the second small conductor 2000-B is a short pitch 8); each conductor (2000-a, 2000-B) of the second conductor set 200-5 is located in 3 and 4 radially adjacent layers of the stator core, respectively.

Referring to fig. 13 to 22, each phase winding has 35 connecting and welding terminals, 18 connecting and welding terminals are formed by connecting and welding terminals located in the first layer and the second layer of the stator core, 18 connecting and welding terminals located in the third layer and the fourth layer of the stator core, and M is 2 or 4 in this embodiment, specifically, the first connecting and welding terminal is formed by connecting and welding a welding terminal connected by a conductor of one second conductor group located inside the 1 st slot of the 4 th layer and a welding terminal connected by a conductor of another second conductor group located inside the 10 th slot of the 3 rd layer, and the second connecting and welding terminal is formed by connecting and welding a fourth layer and the third layer of the stator core in the same radial direction, the pitch between the two corresponding to the two welding terminals connected by the first connecting and welding terminal is the whole pitch 9, and the second connecting and welding terminal is connected by a conductor of one second conductor group located inside the 1 st slot of the 2 nd layer The welding end of the end and one conductor of the other second conductor group, which is located inside the 10 th slot of the 1 st layer, are connected with the first layer at the second layer in the same radial direction of the stator core, the pitch between the two slots corresponding to the two welding ends connected by the second welding end is the whole pitch 9, correspondingly, the connection mode of the other 33 welding ends is similar to that of the first and second welding ends, and further description is omitted here.

Referring to fig. 22, in the present embodiment, each phase winding (U-phase winding, V-phase winding, W-phase winding) further has an extended end of a connecting lead and an extended end of a connecting outlet, the extended end U1 of the connecting lead is located at the fourth layer in the radial direction of the 26 th end in the axial direction of the stator core, the extended end U2 of the connection outlet of the phase winding is located at the radial third layer of the axial 26 th end of the stator core, namely, the extending end of the lead wire end and the extending end of the outlet wire end of the phase winding are positioned at two layers adjacent to the stator iron core in the radial direction, of course, the extending end U1 of the phase winding connecting lead may also be located in the radial second layer of the 26 th axial end of the stator core, and the extending end U2 of the connecting outgoing line may also be located in the radial first layer of the 26 th axial end of the stator core.

Referring to FIGS. 1-22, in the present embodiment, each weld end 303 of each conductor 1000(1000-A, 1000-B, 2000-A, 2000-B, 3000-A, 3000-B) of each conductor set 100-1(100-2, 200-1, 200-2, 200-3, 200-4, 200-5, 300-1, 300-2, 300-3) of each phase winding is located outside of the first end 26 of the stator core, and each conductor 1000(1000-A, 1000-B, 2000-A, 2000-B, 3000-B) of each conductor set 100-1(100-2, 200-1, 200-2, 200-3, 200-4, 200-5, 300-1, 300-2, 300-3) of each phase winding, 3000-a, 3000-B) are located outside the second end 25 of the stator core.

Illustratively, the star connection of the series windings of the motor is shown in fig. 23, and the delta connection of the series windings of the motor is shown in fig. 24.

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 invention. 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

1. An electric machine stator comprising:

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

the stator winding comprises a plurality of phase windings arranged on the stator core, and each slot is divided into M layers by the number of the slots which can be accommodated in the radial direction of the stator core, wherein M is an even number which is more than or equal to 4;

the method is characterized in that: each phase winding comprises two first conductor groups, a plurality of second conductor groups and a plurality of third conductor groups which are connected in series;

the first conductor set includes: the stator core comprises a stator core, a first large conductor, a first small conductor and a second large conductor, wherein the first conductor group is located on a first layer and an Mth layer of the stator core in the radial direction, each conductor of the first conductor group comprises two slot inner parts located in different slots of the same layer of the stator core in the radial direction, a wire inserting end located outside the slots and two welding ends located outside the slots and extending in the same direction;

a first large conductor of the first conductor group of each phase winding surrounds a first small conductor, the first conductor of the first conductor group positioned on the radial Mth layer of the stator core is positioned on one side of the circumferential direction of the stator core of the first large conductor and the first small conductor of the first conductor group, and the first conductor of the first conductor group positioned on the radial first layer of the stator core is positioned on the other side of the circumferential direction of the stator core of the first large conductor and the first small conductor of the first conductor group;

and the first conductor group positioned on the radial first layer of the stator core and the first conductor group positioned on the radial fourth layer of the stator core are arranged adjacently along the circumferential direction of the stator core.

2. The electric machine stator of claim 1, wherein the third conductor set comprises: the same third conductor, and/or different third large conductor and third small conductor, each conductor of the third conductor group is respectively positioned in the (N +1) th layer and the (N +2) th layer which are radially adjacent to the stator core, wherein N is an odd number;

3. The electric machine stator of claim 2, wherein the second conductor set of each of the phase windings comprises: a second large conductor, a second conductor and a second small conductor; each conductor of the second conductor group is respectively positioned on the Nth layer and the (N +1) th layer which are radially adjacent to the stator core.

4. The electric machine stator of claim 3, wherein one of the second large conductors of the second conductor set of each of the phase windings surrounds one of the second small conductors, the second conductor of one of the second conductor sets of each of the phase windings located radially adjacent to the stator core is located on one circumferential side of the stator core of the second large and second small conductors of the second conductor set and is located on the M/2 th, M/2-1 th radial layer of the stator core, the second conductor of the other of the second conductor sets of each of the phase windings located radially adjacent to the stator core is located on the other circumferential side of the stator core of the second large and second small conductors of the second conductor set and is located on the M/2+1 th radial layer of the stator core, The M/2+2 th layer.

5. The electric machine stator of claim 2, wherein the second conductor set of each of the phase windings comprises: three identical second conductors, each conductor of the second conductor set being located in the nth and N +1 th layers of the stator core which are radially adjacent, respectively, or the second conductor set of each of the phase windings including: two second large conductors and one second small conductor, each conductor of the second conductor set being located in the N-th and N + 1-th layers radially adjacent to the stator core, respectively, or the second conductor set of each of the phase windings includes: each conductor of the second conductor group is respectively positioned in the N layer and the N +1 layer which are radially adjacent to the stator core.

6. The electric machine stator of claim 2, wherein at least one of the second conductor sets of each of the phase windings comprises: a second large conductor, a second conductor and a second small conductor; each conductor of the second conductor set is respectively positioned on the Nth layer and the (N +1) th layer which are radially adjacent to the stator core.

7. The electric machine stator of claim 8, wherein at least one of the second conductor sets of each of the phase windings comprises: three identical second conductors, each conductor of the second conductor set being located in the nth and N +1 th layers of the stator core which are radially adjacent, respectively, or at least one of the second conductor sets of each of the phase windings includes: two second large conductors and one second small conductor, each conductor of the second conductor set being located in the N-th and N + 1-th layers radially adjacent to the stator core, respectively, or at least one of the second conductor sets of each of the phase windings includes: each conductor of the second conductor group is respectively positioned in the N layer and the N +1 layer which are radially adjacent to the stator core.

8. The motor stator according to any one of claims 3 to 7, wherein the phase winding has a plurality of connection welding terminals, the connection welding terminals are formed by connecting welding terminals of an M-1 th layer and welding terminals of an M-th layer which are adjacent to each other in the same radial direction of the stator core, the pitch of the plurality of connection welding terminals of the phase winding is the same, and M is an even number.

9. The electric machine stator of claim 8, wherein the phase windings have extended ends connected to lead wires and extended ends connected to outgoing wires, the extended ends of the lead wires and the extended ends of the outgoing wires being located at two layers radially adjacent to the stator core; the extension end of the lead is located on the radial M-1 th layer of the stator core, or the extension end of the lead is located on the radial M-1 th layer of the stator core, and the extension end of the lead is located on the radial M-1 th layer of the stator core.

10. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 9.