CN112018921B

CN112018921B - Centralized stator and motor

Info

Publication number: CN112018921B
Application number: CN202011199642.0A
Authority: CN
Inventors: 刘延海; 陈旭文
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Borgwarner Powertrain Tianjin Co Ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-02-02
Anticipated expiration: 2040-11-02
Also published as: WO2022088599A1; CN112018921A

Abstract

The invention provides a centralized stator, which comprises a stator core and a centralized stator winding structure, wherein the stator core is an integrated core; the centralized stator winding comprises multiple phases of windings, any phase of winding comprises M layers of windings, the M layers of windings are arranged along the radial direction of the stator core, any layer of winding is arranged along the circumferential direction of the stator core, wires of each layer of winding are provided with various line widths, and the width of the wires of each layer of winding from the radial inner side to the radial outer side of the stator core is gradually increased; any phase winding comprises a plurality of coil units, the coil units are connected in series to form a series branch, and any coil unit forms any layer of winding; or, the plurality of coil units are connected in series in groups to form a plurality of parallel branches, and the plurality of coil units positioned on the same pitch circle of the stator core in each parallel branch form a layer winding; the stator winding is compact in overall structure through a series-parallel connection mode or a series connection mode, so that the full rate of the stator slot is improved, and the power density of the whole machine is improved.

Description

Centralized stator and motor

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a centralized stator and a motor.

Background

With the continuous development of the motor industry, concentrated winding motors are largely applied to places with limited axial installation space due to the advantage of short end parts of the two sides of the stator, however, compared with distributed winding motors, the fact that the concentrated winding motors cannot avoid the situation that the copper slot filling rate is not high all the time.

Therefore, when a concentrated winding motor is required to be used in a limited space, how to improve the motor better, the torque density and the power density become very urgent.

Disclosure of Invention

In view of the above problems, the present invention provides a concentrated stator and a motor to solve the above or other former problems in the prior art.

In order to solve the technical problems, the invention adopts the technical scheme that: a centralized stator comprises a stator core and a centralized stator winding structure, wherein the centralized stator winding structure is arranged on the stator core, and the stator core is an integrated core;

the centralized stator winding comprises multiple-phase windings, any phase winding comprises M layers of windings, the M layers of windings are arranged along the radial direction of the stator core, any layer of windings are arranged along the circumferential direction of the stator core, wires of each layer of windings are provided with various line widths, the width of the wires of each layer of windings from the radial inner side to the radial outer side of the stator core is gradually increased, wherein M is more than or equal to 2, and M is an integer; and

any phase winding comprises a plurality of coil units, the coil units are connected in series to form a series branch, and any coil unit forms any layer of winding; or, the plurality of coil units are connected in series in groups to form a plurality of parallel branches, and the plurality of coil units positioned on the same pitch circle of the stator core in each parallel branch form a layer winding;

the coil unit comprises P vertical winding continuous coils, P-1 overlines, a head end and a tail end, wherein the P vertical winding continuous coils are arranged along the circumferential direction of the stator core and are arranged on P tooth parts of the stator core, adjacent vertical winding continuous coils are connected through the overlines, the head end and the tail end are respectively arranged on the vertical winding continuous coils at two ends of the coil unit, and P is more than or equal to 2 and is an integer.

Further, the serial connection mode of the coil units connected in series is reverse welding or same-direction welding or vertical welding.

Furthermore, any phase winding comprises at least two parallel branches, any parallel branch at least comprises an M1 coil unit and an M2 coil unit which are connected in series, the M2 coil unit and the M1 coil unit are respectively a reverse winding coil unit I, a forward winding coil unit I, a reverse winding coil unit II or a forward winding coil unit II, and the cross-line winding directions of the M1 coil unit and the M2 coil unit are opposite or the same.

Further, the direction from the inner side to the outer side of the stator core is taken as a reference direction, the first reverse winding coil unit and the second reverse winding coil unit are wound anticlockwise from the head end to the tail end, the first forward winding coil unit and the second forward winding coil unit are wound clockwise from the head end to the tail end, the wire winding direction of the vertical continuous coil is clockwise or anticlockwise, the vertical continuous coil of the first reverse winding coil unit and the vertical continuous coil of the second reverse winding coil unit are opposite in wire winding direction, and the vertical continuous coil of the first forward winding coil unit and the vertical continuous coil of the second forward winding coil unit are opposite in wire winding direction.

Further, the tail ends of the parallel branches of the windings of each phase are connected in parallel and then connected in a planetary or triangular manner, or the tail ends of the parallel branches of the windings of each phase are connected in series and then connected in a planetary or triangular manner.

Furthermore, the serial branch of any phase winding at least comprises an M3 coil unit and an M4 coil unit which are connected in series, the M3 coil unit and the M4 coil unit are respectively a forward winding coil unit three or a backward winding coil unit three or a forward winding coil unit four or a backward winding coil unit four, and the cross-line winding directions of the M3 coil unit and the M4 coil unit are opposite.

Further, the direction from the inner side to the outer side of the stator core is taken as a reference direction, the crossover of the third forward winding coil unit and the crossover of the fourth forward winding coil unit are clockwise wound along the direction from the head end to the tail end, the crossover of the third reverse winding coil unit and the crossover of the fourth reverse winding coil unit are anticlockwise wound along the direction from the head end to the tail end, the winding direction of the lead of the immediately wound continuous coil is anticlockwise or clockwise, the winding direction of the lead of the immediately wound continuous coil of the third forward winding coil unit and the lead of the immediately wound continuous coil of the fourth forward winding coil unit are opposite, and the winding direction of the immediately wound continuous coil of the third reverse winding coil unit and the immediately wound continuous coil of the fourth reverse winding coil unit are opposite.

Furthermore, the vertical winding continuous coil comprises a plurality of turns of coils connected in series, a turning part is arranged on any turn of coil, and the turning part is in a large arc structure, a minor arc structure or a rounded rectangle structure.

Furthermore, the centralized stator further comprises a slot wedge, the slot wedge is arranged at the notch of the stator core, and the slot wedge is in inserted tight fit with two groups of coils in the slot of the stator core, wherein the number of the slots of the stator core is N, N is a multiple of 3, N is more than or equal to 12, and N is an integer.

An electric machine comprises the centralized stator.

By adopting the technical scheme, the centralized stator winding is compact in structure and convenient to manufacture, each phase of winding comprises a plurality of layers of windings, each layer of winding is arranged along the circumferential direction of the stator core, the plurality of layers of windings are arranged along the radial direction of the stator core, the plurality of layers of windings adopt wires with two or more sizes, the width of the wires is gradually increased from the inner side to the outer side of the stator core, and the conductors are arranged by fully utilizing the space in the slots, so that the overall structure of the stator winding is compact, the slot filling rate of the stator is improved, and the power density of the whole machine is improved; each coil unit adopts a structure of more than two continuous vertical winding coils, so that the number of connection points of the windings is reduced, the problems of complex manufacturing process and low product reliability of products caused by more connection points are solved, the manufacturing process is simplified, and the product reliability is improved; the winding directions of the vertical winding continuous coils are the same, the cross-wire positive and negative winding structure is adopted, and the series-parallel connection combination is adopted, so that the head ends and the neutral points of the windings of all phases are respectively converged together, parallel branches are conveniently connected by the shortest path, the length of a line is effectively reduced, the complexity of the connection is simplified, and the processing manufacturability and the processing efficiency of a happy product are improved; the T-shaped slot wedges are adopted, the slot wedges are tightly matched with the stator coils, and an integral round shape is formed under the support of the stator iron core, so that the radial rigidity is increased, and the coils are prevented from moving; the similar mortise and tenon structure that slot wedge and each coil cooperation formed can effectively avoid the coil to pop out in footpath.

Drawings

FIG. 1 is a schematic structural diagram of a stator according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first contrawound coil unit according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a first clockwise winding coil unit according to an embodiment of the invention;

FIG. 4 is a schematic structural diagram of a second contrawound coil unit according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second clockwise winding coil unit according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a first parallel branch according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a second parallel branch according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a phase winding configuration in accordance with an embodiment of the present invention;

fig. 9 is another schematic structural diagram of a second clockwise winding coil unit according to an embodiment of the invention;

FIG. 10 is another structural schematic of a first contrawound coil unit of an embodiment of the present invention;

FIG. 11 is a schematic diagram of a third structure of a second clockwise winding coil unit according to an embodiment of the invention;

FIG. 12 is a third structural diagram of a first contrawound coil unit in accordance with an embodiment of the present invention;

FIG. 13 is a schematic diagram of another configuration of the first parallel branch according to an embodiment of the present invention;

FIG. 14 is another schematic diagram of the second parallel branch of an embodiment of the present invention;

FIG. 15 is another structural schematic of a phase winding of an embodiment of the present invention;

FIG. 16 is an enlarged view of the portion B of FIG. 15;

FIG. 17 is an enlarged view of the portion C of FIG. 16;

FIG. 18 is an enlarged structural view of part A of FIG. 1 (a schematic view of a structure in which the tail ends of the respective phase windings are star-welded);

FIG. 19 is an enlarged structural view of part A of FIG. 1 (a schematic view of a planetary spot welding in which the tail ends of the respective phase windings are in a series configuration);

FIG. 20 is a schematic structural view of a series connection of a tail end and a head end of a reverse welding configuration according to an embodiment of the present invention;

FIG. 21 is a schematic structural view of a tail end and a head end of an embodiment of the present invention connected in series by vertical welding;

FIG. 22 is a schematic structural view of a tandem tail end and head end connection of the present invention in a co-current welding configuration;

FIG. 23 is a schematic view of a tail end and a head end connected in series by bus bar welding according to an embodiment of the present invention;

FIG. 24 is another schematic diagram of the structure of any of the parallel branches of an embodiment of the present invention;

fig. 25 is a schematic structural view of a reverse-wound coil unit three according to an embodiment of the present invention;

fig. 26 is a schematic structural diagram of a clockwise winding coil unit four according to an embodiment of the present invention;

fig. 27 is a schematic structural diagram of a third clockwise winding coil unit according to an embodiment of the present invention;

fig. 28 is a schematic structural view of a reverse-wound coil unit four according to an embodiment of the present invention;

fig. 29 is another structural view of a reverse-wound coil unit three according to an embodiment of the present invention;

fig. 30 is another schematic structural view of a clockwise coil unit four of an embodiment of the invention;

fig. 31 is a schematic diagram of a circuit in which any phase winding is connected in series with a branch circuit according to an embodiment of the present invention;

fig. 32 is another schematic diagram of a structure in which any one of the phase windings is connected in series in a branch according to an embodiment of the present invention;

fig. 33 is a schematic diagram of a third configuration of any phase winding connected in series with a branch according to an embodiment of the present invention;

fig. 34 is a fourth configuration of a branch connected in series with any one of the phase windings in accordance with an embodiment of the present invention;

fig. 35 is a fifth configuration of a branch circuit connected in series with any of the phase windings in accordance with an embodiment of the present invention;

FIG. 36 is a schematic diagram of a stator winding configuration in which the phase windings are in a series configuration in accordance with an embodiment of the present invention;

FIG. 37 is a schematic diagram of a construction of an edgewise continuous coil in accordance with one embodiment of the invention;

FIG. 38 is a schematic structural diagram of a flying lead according to an embodiment of the present invention;

FIG. 39 is a schematic structural diagram of a head end of an embodiment of the present invention;

FIG. 40 is a schematic structural diagram of the tail end of an embodiment of the present invention;

FIG. 41 is a side view of a vertically wound continuous coil in accordance with an embodiment of the present invention;

FIG. 42 is a schematic diagram of a first turn of each turn of a vertical wound continuous coil according to an embodiment of the present invention in a large arc configuration;

FIG. 43 is a schematic diagram of a first turn of each turn of a stand-up continuous coil according to an embodiment of the invention in a rounded rectangular configuration;

FIG. 44 is a schematic view of a first turn of each turn of a vertical wound continuous coil according to an embodiment of the present invention in a minor arc configuration;

fig. 45 is a schematic top view of a stator core according to an embodiment of the present invention;

FIG. 46 is a cross-sectional partial structural schematic view of a stator winding of an embodiment of the present invention;

FIG. 47 is a cross-sectional structural view of a conductive line according to an embodiment of the present invention;

FIG. 48 is a schematic illustration of a star connection of phase windings according to an embodiment of the present invention;

fig. 49 is a schematic diagram of the delta connection of the phase windings of an embodiment of the present invention.

In the figure:

1. a reverse winding coil unit I2, a forward winding coil unit I3 and a reverse winding coil unit II

4. A second clockwise winding coil unit 5, a first parallel branch 6 and a second parallel branch

7. Winding series structure 8, coil gap 9 and stator core

10. Vertical winding continuous coil 20, flying lead 30, head end

40. Tail end 100, great arc structure 101, fillet rectangle structure

102. Minor arc structure T, thickness W, width

400. Star point structure 401, series structure 11 and reverse winding coil unit III

12. Three forward winding coil units 13, four reverse winding coil units 14 and four forward winding coil units

1-a, a first deformation structure 4-a of a first reverse winding coil unit, a first deformation structure 4-b of a second forward winding coil unit, and a second deformation structure of a second forward winding coil unit

11-a, a first deformation structure 13-a of a third reverse winding coil unit, a first deformation structure 14-a of a fourth reverse winding coil unit, and a first deformation structure of a fourth forward winding coil unit

1-b, a second deformation structure 12-a of the first reverse winding coil unit and a first deformation structure of the third forward winding coil unit.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Fig. 1 shows a schematic structural diagram of an embodiment of the present invention, specifically shows the structure of the embodiment, and the embodiment relates to a centralized stator and a motor, in which the centralized stator winding structure is prepared by using wires of two or more sizes, a wire with a smaller width is used near the inner side of a stator core, a wire with a larger width is used near the outer side of the stator core, conductors are arranged in a slot space to improve the stator slot filling rate, each branch of each phase winding of the stator winding is formed by connecting at least two coil units in series, and each coil unit adopts a structure of more than two continuous vertical winding coils, so that the number of connection points of each phase winding coil is reduced, the manufacturing process is simple, and the product reliability is good.

A centralized stator comprises a stator core 9 and a centralized stator winding structure, wherein the centralized stator winding structure is arranged on the stator core 9, and the stator core 9 is an integrated core; as shown in fig. 1, 8, 15, 31-36, and 45-47, the centralized stator winding structure includes multiple phase windings, where any phase winding includes M layers of windings, where the M layers of windings are arranged along the radial direction of the stator core 9, and any layer of windings is arranged along the circumferential direction of the stator core 9, that is, in the circumferential direction of one pitch of the stator core 9, one layer of windings is arranged, and the M layers of windings are arranged on M radial pitch circles of the stator core 9; the layer windings are formed by winding wires, and the wires of all the layer windings are equal-section-area wires or similar equal-section-area wires or unequal-section-area wires and are selected according to actual requirements; the widths of the conducting wires of the windings of the layers are different, and the widths of the conducting wires of the windings of the layers from the inner side to the outer side are gradually increased along the radial direction of the stator core 9, wherein M is more than or equal to 2 and is an integer; in the multi-phase winding of the stator winding, each phase winding includes at least two layer windings, each layer winding is sequentially arranged along the radial direction of the stator core 9, the width of the wire of the layer winding close to the inner side of the stator core 9 is smaller, the width of the wire of the layer winding close to the outer side of the stator core 9 is larger, the stator winding is formed by winding the wires with at least two widths, the specification type of the wire is selected according to the number of the layer windings of each phase in the stator winding, that is, the specification type of the wire is selected according to the number of the coils wound on each tooth of the stator core 9, and no specific requirement is made here.

In the present embodiment, as shown in fig. 46 and 47, it is preferable that the wire wound around the stator winding is a flat wire having an equal cross-sectional area, the cross-sectional shape of the wire is rectangular, the wire width of the wire near the inner side of the stator core 9 is a narrow wire width, that is, the width W of the wire on the side is small, and the wire width of the wire near the outer side of the stator core 9 is a wide wire width, that is, the width W of the wire on the side is large, the thickness T of the wire having the wide wire width is different from the thickness T of the wire having the narrow wire width, the width W of the wire having the wide wire width is larger than the width W of the wire having the narrow wire width, and the wires having different specifications are used, so that the wires can be arranged by fully.

In each phase winding of the stator winding, the number of layer windings is set according to actual requirements, and no specific requirements are made here.

As shown in fig. 1 and 36, the coil units in any phase winding may be connected in series or in parallel, and are selected according to actual requirements, that is, any phase winding includes a plurality of coil units, the plurality of coil units are connected in series to form a series branch to form a phase winding structure, any coil unit forms any layer winding, that is, the plurality of coil units of any phase winding are connected in series to form a series branch, in the series branch, any coil unit is located on any pitch circle of the stator core 9 to form a layer winding, then the plurality of coil units of the series branch are arranged along the radial direction of the stator core 9, each coil unit is located on a pitch circle of the stator core 9 to form a layer winding, and adjacent layer windings are connected in series to form the series branch; the structure of each phase winding of the stator winding is the same, when each phase winding is installed on the stator core 9, the head end 30 and the tail end 40 of each phase winding are arranged close to each other, the tail end 40 of each phase winding is convenient to carry out star connection or triangular connection, and the connection structure is simple.

Or, the plurality of coil units are connected in series in groups to form a plurality of parallel branches, the plurality of parallel branches are connected in parallel to form any phase winding, and the plurality of coil units located on the same pitch circle of the stator core 9 in each parallel branch form a layer winding; grouping a plurality of coil units, wherein the coil units in each group are connected in series, a plurality of groups of coil units connected in series form a plurality of parallel branches, and the parallel branches are connected in parallel to form any phase winding; in any parallel branch, including a plurality of series connection's coil unit, each coil unit is located a pitch circle of stator core 9, then a plurality of coil units are located a plurality of different pitch circles of stator core 9, and a plurality of coil unit series connection, then, in a plurality of parallel branches, a plurality of coil units that are located the same pitch circle of stator core 9 constitute a layer winding, coil unit series connection on the adjacent pitch circle (adjacent layer winding) that is located the same radial direction of stator core 9 constitutes a parallel branch, a plurality of parallel branches parallel connection constitute arbitrary phase winding, along the inboard to the outside of stator core 9, the pitch circle diameter of stator core 9 increases gradually, in stator core 9 radial direction, different layer winding corresponds different pitch circle size, adjacent layer winding is on adjacent pitch circle. The structure of each phase winding of the stator winding is the same, when each phase winding is installed on the stator core 9, the head end 30 and the tail end 40 of each phase winding are arranged close to each other, the tail end 40 of each phase winding is convenient to carry out star connection or triangular connection, and the connection structure is simple.

As shown in fig. 20 to 23, in the series branch or the parallel branch, the series connection manner of the coil units connected in series is reverse welding, or same-direction welding, or vertical welding, or is connected by a bus bar, which is selected according to the actual arrangement manner.

As shown in fig. 25 to 36, when any phase winding is connected in series, the phase winding is formed by connecting a plurality of coil units in series to form a series branch. Specifically, as shown in fig. 33 and 34, any phase winding at least includes M3 coil units and M4 coil units connected in series, the number of M3 coil units and M4 coil units may be one or more, and is selected according to actual requirements, the M3 coil units and M4 coil units are sequentially wound three 12 coil units, reversely wound three 11 coil units, reversely wound four 13 coil units, or sequentially wound four 14 coil units, and the M3 coil unit and the M4 coil unit may be of the same type or different types, and are selected according to actual requirements, which is not specifically required here. The M3 coil unit and the M4 coil unit are arranged along the radial direction of the stator core 9, the M3 coil unit is located on a pitch circle of the stator core 9, the M4 coil unit is located on an adjacent pitch circle, a plurality of layers of windings forming the phase winding are gradually increased in width of wires of each layer of windings from the radial inner side to the outer side of the stator core 9, the overall structure of the stator winding is compact, the stator slot filling rate is improved, and the power density of the whole machine is improved.

As shown in fig. 25-30, each of the M3 coil unit and the M4 coil unit includes P vertically wound continuous coils 10, P-1 flying leads 20, a head end 30, and a tail end 40, the P vertically wound continuous coils 10 are arranged along the circumferential direction of the stator core 9 and are mounted on P teeth of the stator core 9, adjacent vertically wound continuous coils 10 are connected by the flying leads 20, the head end 30 and the tail end 40 are respectively arranged on the vertically wound continuous coils 10 at both ends of the coil unit, wherein P is greater than or equal to 2 and P is an integer; the head end 30, the first vertically-wound continuous coil 10, the first crossover wire 20, the second vertically-wound continuous coil 10, the second crossover wire 20 … …, the P-th vertically-wound continuous coil 10 and the tail end 40 are sequentially connected in series, the vertically-wound continuous coils 10 are connected through the crossover wires 20, the head end 30 and the tail end 40 are respectively connected to the vertically-wound continuous coils 10 at the two ends of the M3 coil unit and the M4 coil unit, so that the M3 coil unit is connected with the M4 coil unit in series; with the direction from the inner side to the outer side of the stator core 9 as a reference direction, the crossover 20 of the forward winding coil unit three 12 and the forward winding coil unit four 14 is clockwise wound along the direction from the head end 30 to the tail end 40, and the crossover 20 of the reverse winding coil unit three 11 and the reverse winding coil unit four 13 is anticlockwise wound along the direction from the head end 30 to the tail end 40; with the inside-to-outside direction of the stator core 9 as a reference direction, the wire winding direction of the immediately wound continuous coil 10 is counterclockwise or clockwise, then the wire winding directions of the immediately wound continuous coils 10 of the three 12 clockwise winding coil units and the four 14 clockwise winding coil units are opposite, one is counterclockwise, the other is clockwise, the wire winding directions of the immediately wound continuous coils 10 of the three 11 inversely winding coil units and the four 13 inversely winding coil units are opposite, one is counterclockwise, the other is clockwise, and then the three 11 inversely winding coil units and the four 13 inversely winding coil units are respectively: the winding direction of the lead of the vertical winding continuous coil 10 is anticlockwise, the winding direction of the overline 20 is anticlockwise, the winding direction of the lead of the vertical winding continuous coil 10 is clockwise, and the winding direction of the overline 20 is anticlockwise; the third 12 of the clockwise winding coil unit and the fourth 14 of the clockwise winding coil unit are respectively: the winding direction of the lead of the vertically wound continuous coil 10 is counterclockwise, the winding direction of the overline 20 is clockwise, the winding direction of the lead of the vertically wound continuous coil 10 is clockwise, the winding direction of the overline 20 is clockwise, and a serial branch formed by connecting the M3 coil unit and the M4 coil unit in series is formed by connecting any two of a forward winding coil unit three 12, a forward winding coil unit four 14, a reverse winding coil unit three 11 and a reverse winding coil unit four 13 in series.

However, in this embodiment, it is preferable that the winding directions of the crossover wires 20 of the M3 coil unit and the M4 coil unit are opposite to each other, so that when the M3 coil unit and the M4 coil unit are connected in series to form a series branch, the current directions of the vertically wound continuous coils 10 of the respective teeth of each phase are aligned, and at the same time, the leading end 30 and the trailing end 40 of the branch included in each phase are disposed in the vicinity of each other, so that the series structure of the coil units connected in series in each branch is simple, and the structure of the stator winding is simple. In the present embodiment, in the serial branch, the number of the vertically wound continuous coils 10 of each M3 coil unit and M4 coil unit is the same, then, the M3 coil unit is located on one pitch circle of the stator core 9 and is a layer winding, the M4 coil unit is located on an adjacent pitch circle of the stator core 9 and is another layer winding, each vertically wound continuous coil 10 of the M3 coil unit and each vertically wound continuous coil 10 of the M4 coil unit are located on the same tooth of the stator core 9, in the M3 coil unit and M4 coil unit, the vertically wound continuous coil 10 provided with the head end 30 of one coil unit and the vertically wound continuous coil 10 provided with the tail end 40 of the other coil unit are located on the same tooth of the stator core 9, then the vertically wound continuous coil 10 provided with the tail end 40 of one coil unit and the vertically wound continuous coil 10 provided with the head end 30 of the other coil unit are located on the other tooth of the stator core 9, the head end 30 and the tail end 40 that are located same tooth of two coil units are connected, constitute the series branch, then head end 30 and the tail end 40 of this series branch are located same tooth of stator core 9, the same structure of winding of other looks, and the head end 30 of each phase winding of stator winding sets up nearby, e.g., be located adjacent three tooth of stator core 9, be convenient for the tail end 40 of each phase winding of stator winding connects, make each tooth of each phase winding in the electric current direction unanimous, be the observation direction from the inside toward the outside of stator core 9, the electric current in the coil of each tooth is clockwise current or anticlockwise electric current, the head end 30 and the tail end 40 of each contained branch of looks set up nearby, the series structure of the coil unit of series connection in each branch is simple.

Specifically, as shown in fig. 31, when any phase winding is a serial branch, the serial branch includes an M3 coil unit and an M4 coil unit connected in series, the M3 coil unit and the M4 coil unit are sequentially arranged from inside to outside along the radial direction of the stator core 9, wherein the M3 coil unit is a forward coil unit three 12, and is wound clockwise along the span 20 from the head end 30 to the tail end 40, the lead of the immediately wound continuous coil 10 is wound clockwise, the M4 coil unit is a backward coil unit three 11, and is wound counterclockwise along the span 20 from the head end 30 to the tail end 40, the lead of the immediately wound continuous coil 10 is wound counterclockwise, the head end 30 of the M3 coil unit is connected to the tail end 40 of the M4 coil unit to form a serial branch, and the head end 30 and the tail end 40 of the serial branch are located on the same tooth of the stator core 9.

As shown in fig. 32, when any phase winding is a serial branch, the serial branch includes an M3 coil unit and an M4 coil unit connected in series, the M3 coil unit and the M4 coil unit are arranged from inside to outside along the radial direction of the stator core 9, wherein the M3 coil unit is a counter-wound coil unit four 13 and is wound counterclockwise along the traverse 20 from the head end 30 to the tail end 40, the lead of the immediately-wound continuous coil 10 is wound clockwise, the M4 coil unit is a counter-wound coil unit four 14 and is wound clockwise along the traverse 20 from the head end 30 to the tail end 40, the lead of the immediately-wound continuous coil 10 is wound counterclockwise, the head end 30 of the M3 coil unit is connected to the tail end 40 of the M4 coil unit to form a serial branch, and the head end 30 and the tail end 40 of the serial branch are located on the same tooth portion of the stator core 9.

As shown in fig. 33, when any phase winding is a serial branch, the serial branch includes an M3 coil unit and an M4 coil unit connected in series, the M3 coil unit and the M4 coil unit are sequentially arranged from inside to outside along the radial direction of the stator core 9, wherein the M3 coil unit is a counter-wound coil unit four 13, and is wound along the direction from the head end 30 to the tail end 40 along the counter-clockwise direction of the crossover 20, the lead of the immediately-wound continuous coil 10 is wound along the clockwise direction, the M4 coil unit is a modified structure one 12-a of the immediately-wound coil unit three, the extending directions of the head end 30 and the tail end 40 are horizontal, and are opposite, the crossover 20 is wound along the direction from the head end 30 to the tail end 40, the lead of the immediately-wound continuous coil 10 is wound along the clockwise direction, and at this time, the head end 30 of the M3 coil unit is connected with the tail end 40 of the M4, the connection structure is simple, welding is convenient, a series branch is formed, and the head end 30 and the tail end 40 of the series branch are located on the same tooth part of the stator core 9.

As shown in fig. 34, when any phase winding is a serial branch, the serial branch includes an M3 coil unit and an M4 coil unit connected in series, the M3 coil unit and the M4 coil unit are sequentially arranged from inside to outside along the radial direction of the stator core 9, wherein the M3 coil unit is a forward coil unit three 12, and is wound clockwise along the traverse 20 from the head end 30 to the tail end 40, the lead of the immediately-wound continuous coil 10 is wound clockwise, the M4 coil unit is a modified structure one 13-a of an anti-winding coil unit four, the extension directions of the head end 30 and the tail end 40 are horizontal, and are the same, the traverse 20 is wound counterclockwise along the direction from the head end 30 to the tail end 40, the lead of the immediately-wound continuous coil 10 is wound clockwise, the head end 30 of the M3 coil unit is connected to the tail end 40 of the M4 coil unit, the connection structure is simple, welding is facilitated, forming a series branch, the head end 30 and the tail end 40 of which are located on the same tooth of the stator core 9.

As shown in fig. 35, when any phase winding is a serial branch, the serial branch includes an M3 coil unit and an M4 coil unit connected in series, the M3 coil unit and the M4 coil unit are arranged from inside to outside along the radial direction of the stator core 9, wherein the M3 coil unit is a first deformation structure 11-a of a third reverse-winding coil unit, the first half 20 is wound counterclockwise along the direction from the head end 30 to the tail end 40, the lead wire immediately wound around the continuous coil 10 is wound counterclockwise, the head end 30 and the tail end 40 both extend horizontally and in the same direction, the M4 coil unit is a fourth reverse-winding coil unit 14-a, the second half 20 is wound clockwise along the direction from the head end 30 to the tail end 40, the lead wire immediately wound around the continuous coil 10 is wound counterclockwise, the tail end 40 extends horizontally, the head end 30 of the M3 coil unit is connected to the tail end 40 of the M4 coil unit, forming a series branch whose head end 30 and tail end 40 are located on the same tooth of stator core 9.

When any phase winding is connected in parallel, as shown in fig. 1-19 and 24, any phase winding includes at least two parallel branches, any parallel branch includes at least M1 coil unit and M2 coil unit connected in series, M1 coil unit and M2 coil unit are both a first reverse-winding coil unit 1, a first forward-winding coil unit 2, a second reverse-winding coil unit 3, or a second forward-winding coil unit 4, and M1 coil unit and M2 coil unit are any two-two combination of the above four coil units, i.e., M1 coil unit is a first reverse-winding coil unit 1, M2 coil unit is a second reverse-winding coil unit 3, or M1 coil unit is a first reverse-winding coil unit 1, M2 coil unit is a second forward-winding coil unit 4, or M1 coil unit is a first reverse-winding coil unit 1, M2 coil unit is a first forward-winding coil unit 2, or M1 coil unit is a first reverse-winding coil unit 1, the M2 coil unit is a first counter-wound coil unit 1, or the M1 coil unit is a first forward-wound coil unit 2, the M2 coil unit is a second counter-wound coil unit 3, or the M1 coil unit is a first forward-wound coil unit 2, and the M2 coil unit is a second forward-wound coil unit 4, or the M1 coil unit is a first forward-wound coil unit 2, and the M2 coil unit is a first forward-wound coil unit 2, or the M1 coil unit is a first forward-wound coil unit 2, and the M2 coil unit is a first counter-wound coil unit 1, or the M1 coil unit is a second counter-wound coil unit 3, and the M2 coil unit is a second counter-wound coil unit 3, or the M1 coil unit is a second counter-wound coil unit 3, and the M2 coil unit is a second forward-wound coil unit 4, or the M1 coil unit is a second counter-wound coil unit 3, the M2 coil unit is a first forward-wound coil unit 2, or the M1 coil unit is a second counter-wound coil 3, the M2 coil unit is a reverse winding coil unit one 1, or the M1 coil unit is a forward winding coil unit two 4, the M2 coil unit is a reverse winding coil unit two 3, or the M1 coil unit is a forward winding coil unit two 4, the M2 coil unit is a forward winding coil unit two 4, or the M1 coil unit is a forward winding coil unit two 4, the M2 coil unit is a forward winding coil unit one 2, or the M1 coil unit is a forward winding coil unit two 4, the M2 coil unit is a reverse winding coil unit one 1, and the selection is performed according to actual requirements, and no specific requirements are made here.

As shown in fig. 2-14, the M1 coil unit is similar to the M2 coil unit in structure, each of the M1 coil unit and the M2 coil unit includes P vertically wound continuous coils 10, P-1 flying leads 20, a head end 30 and a tail end 40, the P vertically wound continuous coils 10 are arranged along the circumferential direction of the stator core 9, the P vertically wound continuous coils 10 are mounted on the P teeth of the stator core 9, adjacent vertically wound continuous coils 10 are connected by the flying leads 20, the head end 30 and the tail end 40 are respectively arranged on the vertically wound continuous coils 10 at both ends of the coil unit, the tail end 40 of the M1 coil unit is connected with the head end 30 of the M2 coil unit, that is, each of the M1 coil unit and the M2 coil unit is composed of a plurality of vertically wound continuous coils 10 connected in series, the head end 30 and the tail end 40 are respectively arranged on the vertically wound continuous coils 10 at both ends of the M1 coil unit and the M2 coil unit, the head end 30, the tail end 40, The first vertically-wound continuous coil 10, the first crossover wire 20, the second vertically-wound continuous coil 10, the second crossover wire 20, … …, the P-th vertically-wound continuous coil 10 and the tail end 40 are sequentially connected to form an M1 coil unit and an M2 coil unit, the head end 30 and the tail end 40 at two ends are arranged nearby, so that the M1 coil unit and the M2 coil unit are connected in series, wherein P is more than or equal to 2 and is an integer, the M1 coil unit and the M2 coil unit at least comprise two vertically-wound continuous coils 10, and the structure of more than two continuous vertically-wound continuous coils 10 is adopted, so that the connection points of windings are reduced, the manufacturing process is simple, the product reliability is high, and the problems of complex manufacturing process and low product reliability caused by more connection points of products are solved.

In any phase winding of the stator winding, each parallel branch at least comprises an M1 coil unit and an M2 coil unit which are connected in series, the number of the M1 coil units and the M2 coil units is one or more, the M1 coil units and/or M2 coil units of the parallel branches, which are positioned on the same pitch circle of the stator core 9, form one layer of winding of the stator winding, the M1 coil units and/or M2 coil units of the parallel branches, which are positioned on adjacent pitch circles of the stator core 9, form another layer of winding of the stator winding, the specification of the conducting wires of the M1 coil units, which are positioned on different pitch circles of the stator core 9, is different from the width of the conducting wires of the M2 coil units, and the specification of the conducting wires of the M1 coil units, which are positioned on the same pitch circle of the stator core 9, is the same as the width of the conducting wires of the M2 coil units.

When the M1 coil unit and the M2 coil unit are connected in series to form a parallel branch, in the M1 coil unit and the M2 coil unit, the head end 30 of one coil unit is the head end 30 of the parallel branch, the tail end 40 of the coil unit is used for being connected with the head end 30 of another coil unit, the head end 30 of the other coil unit corresponds to a series connection end, and the tail end 40 of the other coil unit is used as the tail end 40 of the parallel branch, is used for being connected with each parallel branch in the phase winding in parallel, and is used for being connected with the tail end 40 of each phase winding in a star connection or a triangular connection.

And the vertical winding continuous coil 10 is a multi-turn coil wound by a lead wire, and has two connecting ends, which are located at the same ends of two sides of the multi-turn coil and are convenient to be connected with the head end 30 or the tail end 40 or the jumper wire 20, in any parallel branch, the number P = N/3/parallel branch number of the vertical winding continuous coil 10, N is the number of slots of the stator core 9, N is a multiple of 3, N is not less than 12 and N is an integer.

The winding direction of the wire of the M1 coil unit and the M2 coil unit around the continuous coil 10 is clockwise or counterclockwise, which is selected according to the actual requirement, and the direction from the inside to the outside of the stator core 9 is taken as the reference direction, and no specific requirement is made here.

Taking the inside-to-outside direction of the stator core 9 as the reference direction, the crossover 20 of the first counter-winding coil unit 1 is wound counterclockwise along the direction from the head end 30 to the tail end 40, the crossover 20 of the first counter-winding coil unit 2 is wound clockwise along the direction from the head end 30 to the tail end 40, the crossover 20 of the second counter-winding coil unit 3 is wound counterclockwise along the direction from the head end 30 to the tail end 40, the crossover 20 of the second counter-winding coil unit 4 is wound clockwise along the direction from the head end 30 to the tail end 40, the wire winding direction of the immediately-wound continuous coil 10 of the first counter-winding coil unit 1 is the counterclockwise direction, the wire winding direction of the immediately-wound continuous coil 10 of the second counter-winding coil unit 3 is the clockwise direction, the wire winding direction of the immediately-wound continuous coil 10 of the first counter-winding coil unit 2 is the counterclockwise direction, and the wire winding direction of the immediately-wound continuous coil.

The winding directions of the crossover wires 20 of the M1 coil unit and the M2 coil unit located on two adjacent pitch circles along the same radial direction of the stator core 9 may be the same or opposite, when the winding directions of the crossover wires 20 of the M1 coil unit and the M2 coil unit located on the same pitch circle of the stator core 9 are opposite, the parallel branch is shaped like a half ring, and when the winding directions of the crossover wires 20 of the M1 coil unit and the M2 coil unit located on the same pitch circle of the stator core 9 are the same, the parallel branch is shaped like a ring, so that the current directions in the vertically-wound continuous coils 10 of the respective teeth of each phase of winding are the same, and the clockwise current or the counterclockwise current is obtained by taking the direction from the inside to the outside of the stator core 9 as a reference direction.

In the present embodiment, the number of the M1 coil units of the vertically wound continuous coils 10 is the same as the number of the M2 coil units of the vertically wound continuous coils 10, so that the head ends 30 and the tail ends 40 of the multiple parallel branches of each phase winding are arranged near to each other, and the serial structure of the coil units connected in series in each branch is simple.

The extending directions of the head end 30 of the M1 coil unit and the head end 30 of the M2 coil unit may be the same or different, and the extending directions of the tail end 40 of the M1 coil unit and the tail end 40 of the M2 coil unit may be the same or different, and may extend in the horizontal direction or in the vertical direction, and are selected according to actual requirements, and no specific requirement is made here.

Specifically, as shown in fig. 13, the M1 coil unit is a modified structure two 1-b of a reverse-wound coil unit one, the winding direction of the lead of the vertical winding continuous coil 10 is anticlockwise, the M2 coil unit is a first deformation structure 4-a along the second coil unit, when the winding direction of the lead of the vertical winding continuous coil 10 is anticlockwise, the tail end 40 of the first deformation structure II 1-b of the first reverse winding coil unit is connected with the head end 30 of the first deformation structure I4-a of the second forward winding coil unit to form a parallel branch, the head end 30 of the second deformation structure II 1-b of the first reverse winding coil unit is the head end 30 of the parallel branch, the tail end 40 of the first deformation structure I4-a of the second forward winding coil unit is the tail end 40 of the parallel branch, the parallel branch is in a semi-annular shape and is arranged on the stator core 9, and at this time, the head end 30 and the tail end 40 of the parallel branch are positioned on the same tooth part of the stator core 9;

as shown in fig. 14, when the M1 coil unit is the second deformation structure 4-b of the second clockwise coil unit, the winding direction of the wire of the vertical winding continuous coil 10 is anticlockwise, the M2 coil unit is a deformed structure I1-a of a reverse winding coil unit I, when the winding direction of the lead of the vertical winding continuous coil 10 is anticlockwise, the tail end 40 of the second deformation structure 4-b of the clockwise winding coil unit II is connected with the head end 30 of the first deformation structure 1-a of the anticlockwise winding coil unit I to form a parallel branch, the head end 30 of the second deformation structure 4-b of the clockwise winding coil unit II is the head end 30 of the parallel branch, the tail end 40 of the first deformation structure 1-a of the anticlockwise winding coil unit I is the tail end 40 of the parallel branch, the parallel branch is in a semi-annular shape and is arranged on the stator core 9, and at this time, the head end 30 and the tail end 40 of the parallel branch are positioned on the same tooth part of the stator core 9;

as shown in fig. 6, when the M1 coil unit is the first counter-wound coil unit 1 and the M2 coil unit is the first forward-wound coil unit 2, the tail end 40 of the first counter-wound coil unit 1 is connected to the head end 30 of the first forward-wound coil unit 2 to form a parallel branch, the head end 30 of the first counter-wound coil unit 1 is the head end 30 of the parallel branch, and the tail end 40 of the first forward-wound coil unit 2 is the tail end 40 of the parallel branch, the parallel branch is semi-annular and is disposed on the stator core 9, and the head end 30 and the tail end 40 of the parallel branch are located on the same tooth of the stator core 9;

as shown in fig. 7, when the M1 coil unit is the forward winding coil unit two 4 and the M2 coil unit is the reverse winding coil unit two 3, the tail end 40 of the forward winding coil unit two 4 is connected to the head end 30 of the reverse winding coil unit two 3 to form a parallel branch, the head end 30 of the forward winding coil unit two 4 is the head end 30 of the parallel branch, and the tail end 40 of the reverse winding coil unit two 3 is the tail end 40 of the parallel branch, so that the parallel branch is half-ring-shaped and is disposed on the stator core 9, and at this time, the head end 30 and the tail end 40 of the parallel branch are located on the same tooth of the stator core 9;

as shown in fig. 24, when the M1 coil unit is the forward winding coil unit two 4 and the M2 coil unit is the reverse winding coil unit one 1, the tail end 40 of the forward winding coil unit two 4 is connected to the head end 30 of the reverse winding coil unit one 1 to form a parallel branch, the head end 30 of the forward winding coil unit two 4 is the head end 30 of the parallel branch, and the tail end 40 of the reverse winding coil unit one 1 is the tail end 40 of the parallel branch, so that the parallel branch is annular and is disposed on the stator core 9, and at this time, the head end 30 and the tail end 40 of the parallel branch are located on different teeth of the stator core 9, and in this structure, the two layer windings of the phase winding are two parallel branches, respectively, the head ends 30 of the two parallel branches are located on the same tooth of the stator core 9, and the tail ends 40 of the two parallel branches are located on the other tooth of the stator core 9;

the M1 coil unit and the M2 coil unit are sequentially disposed along the inner side to the outer side of the stator core 9, or the M2 coil unit and the M1 coil unit are sequentially disposed along the inner side to the outer side of the stator core 9, that is, the positions and structures of the M1 coil unit and the M2 coil unit are interchangeable, so that the specifications of the wires constituting the M1 coil unit and the M2 coil unit are modified accordingly, so that the wires located near the inner side of the stator core 9 are narrow-line-width wires, and the wires near the outer side of the stator core 9 are wide-line-width wires.

As shown in fig. 20-23, the tail end 40 of the M1 coil unit is connected in series with the head end 30 of the M2 coil unit to form a winding series structure 7, the series connection is reverse welding, or same direction welding, or vertical welding, or welding through a bus bar, when the tail end 40 of the M1 coil unit is connected in series with the head end 30 of the M2 coil unit is reverse welding, the tail end 40 of the M1 coil unit and the head end 30 of the M2 coil unit both extend along the horizontal direction, and the tail end 40 of the M1 coil unit extends in the opposite direction to the head end 30 of the M2 coil unit, and the two ends are adjacently arranged and directly welded; when the tail end 40 of the M1 coil unit is welded in the same direction as the head end 30 of the M2 coil unit, the tail end 40 of the M1 coil unit and the head end 30 of the M2 coil unit both extend along the horizontal direction, the tail end 40 of the M1 coil unit and the head end 30 of the M2 coil unit extend in the same direction, the two ends are adjacently arranged, and the two ends are directly welded; when the tail end 40 of the M1 coil unit is welded perpendicularly to the head end 30 of the M2 coil unit, the tail end 40 of the M1 coil unit is arranged perpendicularly to the head end 30 of the M2 coil unit, one extends in the horizontal direction and the other extends in the vertical direction, the ends of the two are arranged adjacently, and the ends of the two are welded directly; when the trailing end 40 of the M1 coil unit and the leading end 30 of the M2 coil unit are welded by the bus bar, the trailing end 40 of the M1 coil unit and the leading end 30 of the M2 coil unit each extend in the vertical direction with a distance therebetween, and the ends of the two are welded by the bus bar.

The tail ends 40 of the parallel branches of the multiphase winding are connected in parallel and then connected in a planetary or triangular manner, or the tail ends 40 of the parallel branches of the multiphase winding are connected in series and then connected in a planetary or triangular manner. As shown in fig. 1, 18, 19, 48 and 49, when the tail ends 40 of the multi-phase windings are connected in a star connection, there are two star connection modes, one is: the tail ends 40 of the parallel branches of one phase of winding in the multi-phase winding are connected in parallel, after the connection, the tail ends 40 of the parallel branches of the phase of winding are welded to be a star point structure 400, star welding is carried out, when the tail ends 40 of the phase of winding of the stator winding are welded in the mode, the number of welding points is consistent with the number of the parallel branches, and all the tail ends 40 are gathered together to be easier to weld by adopting the connection mode. Another star connection is: the tail end 40 of the parallel branch in each phase winding in the multi-phase winding is directly processed by equipment to be processed into a series structure 401, and then a plurality of wires are peeled and welded at the welding position of the tail end 40 of the multi-phase winding.

As shown in fig. 37 to 40, the vertical wound continuous coil 10 is formed by winding a plurality of turns of the coil, and each turn of the vertical wound continuous coil 10 includes a turning part, and the turning part is in the shape of a large arc structure 100, a minor arc structure 102 or a rounded rectangular structure 101. Specifically, each turn of coil comprises a first straight line part, a second straight line part, a first turning part and a second turning part, wherein the first turning part is respectively connected with one end of the first straight line part and one end of the second straight line part, the second turning part is connected with the other end of the first straight line part or the other end of the second straight line part to form a structure of each turn of coil, and when the first turning part and the second turning part are in the shape of a large arc structure 100, the two ends of the large arc-shaped first turning part and the two ends of the second turning part are respectively tangent to the first straight line part and the second straight line part; when the first turning part and the second turning part are in the inferior arc structure 102, two ends of the inferior arc-shaped first turning part and two ends of the second turning part are not tangent to the first straight line part and the second straight line part; when the first and second turning portions are in the shape of a rounded rectangle 101, the bent portions of the first and second turning portions are in the shape of a rounded corner, and the other connecting portions are in the shape of straight lines. The coil gaps 8 between the coils are different due to the deformation of the bending structures of the first bending part and the second bending part, and when the shapes of the first bending part and the second bending part are large arcs, the gaps between the coils are minimum compared with other bending structures, and the gaps can be reduced by about 50%.

The position of the head end 30 of each phase winding of the stator winding can be a structure which is far away from each other or a structure which is close to each other, and the arrangement is selected according to the actual requirement, and no specific requirement is made here. Preferably, in the present embodiment, the position of the head end 30 of each phase winding of the stator winding is set to a close structure, and the connection structure is simple.

In the present embodiment, the structure of the vertically wound continuous coil 10 is the same, the vertically wound continuous coil 10 is connected in series by the flying lead 20 and is connected to the head end 30 and the tail end 40 of different shapes, and different types of coil units are configured by adjusting different winding directions of the flying lead 20.

This centralized stator still includes slot wedge 11, and slot wedge 11 locates stator core 9's notch department, and slot wedge 11 and stator core 9's the coil grafting interference fit in the inslot, and wherein, the quantity in stator core 9's groove is N, and N is the multiple of 3, and N is more than or equal to 12 and N is the integer, this stator core 9 formula stator core 9 as an organic whole. This slot wedge 11's cross sectional shape is the T type, slot wedge 11 includes plane portion and insertion portion, plane portion is connected with the insertion portion is perpendicular, insertion portion inserts in the clearance between two coils of stator core 9's inslot, and insertion portion and coil tight fit, make slot wedge 11 form a whole circular under stator core 9 supports, radial rigidity has been increased, avoid each coil drunkenness, and slot wedge 11's plane portion blocks the coil of stator core 9's inslot, can avoid the coil to pop out on radial direction.

The following is a detailed description of a specific example. As shown in fig. 1 to 8, the stator winding includes three-phase windings, each phase winding includes two parallel branches, the first parallel branch 5 includes an M1 coil unit and an M2 coil unit connected in series, the M1 coil unit is a first reverse-winding coil unit 1, the M2 coil unit is a first forward-winding coil unit 2, the second parallel branch 6 includes an M1 coil unit and an M2 coil unit connected in series, the M1 coil unit is a second forward-winding coil unit 4, and the M2 coil unit is a second reverse-winding coil unit 3, so that the first parallel branch 5 and the second parallel branch 6 are both half-ring-shaped, the head end 30 and the tail end 40 of the first parallel branch 5 are located on two vertically-wound continuous coils 10 on the same tooth, and the head end 30 and the tail end 40 of the second parallel branch 6 are located on two vertically-wound continuous coils 10 on the same tooth.

In the present embodiment, as shown in fig. 45, the stator core 9 is an integral stator core 9, the number N of slots of the stator core 9 is 36, the number P of vertically wound continuous coils 10 included in each coil unit is 6, and the number M of layers of each phase winding is 2.

Then, as shown in fig. 1 to 8, each of the first counter-wound coil unit 1, the first clockwise-wound coil unit 2, the second clockwise-wound coil unit 4, and the second counter-wound coil unit 3 includes 6 vertical-wound continuous coils 10, the 6 vertical-wound continuous coils 10 are connected in series by 5 crosswires 20, the head end 30 and the tail end 40 are respectively located on the vertical-wound continuous coils 10 at both ends of the coil unit after the series connection, wherein, along the direction from the head end 30 to the tail end 40, the crosswire 20 of the first counter-wound coil unit 1 is wound counterclockwise, the winding direction of the lead of the vertical-wound continuous coil 10 is counterclockwise, the crosswire 20 of the first clockwise-wound coil unit 2 is wound clockwise, the winding direction of the vertical-wound continuous coil 10 is clockwise, the crosswire 20 of the second counter-wound coil unit 4 is wound clockwise, the winding direction of the vertical-wound continuous coil 10 is the counterclockwise, the crosswire 20 of the second counter-wound coil unit 3 is wound counterclockwise, the winding direction of the lead of the, the head ends 30 of the first reverse winding coil unit 1 and the second forward winding coil unit 4 are used as the head ends 30 of the parallel branches, the tail ends 40 of the first reverse winding coil unit 1 and the second forward winding coil unit 4 are used for being connected with the head ends 30 of other coil units of the parallel branches, the head ends 30 of the first forward winding coil unit 2 and the second reverse winding coil unit 3 are corresponding to the serial connection end and are used for being connected with the tail ends 40 of the other coil units of the parallel branches, the tail ends 40 of the first forward winding coil unit 2 and the second reverse winding coil unit 3 are used for welding when the parallel branches are connected in a star shape or a triangular shape, the first reverse winding coil unit 1 and the first forward winding coil unit 2 are similar in shape and are semi-annular, the head ends 30 and the tail ends 40 are opposite in arrangement position, and the head end 30 position of the first reverse winding coil unit 1 corresponds to the tail end 40 position of the first forward winding coil unit 2, the tail end 40 position of the first reverse winding coil unit 1 corresponds to the head end 30 position of the first forward winding coil unit 2, the shapes of the second forward winding coil unit 4 and the second reverse winding coil unit 3 are similar and are semi-annular, the head end 30 position of the second forward winding coil unit 4 corresponds to the tail end 40 position of the second reverse winding coil unit 3, and the tail end 40 position of the second forward winding coil unit 4 corresponds to the head end 30 position of the second reverse winding coil unit 3.

The width of the wire of the first reverse winding coil unit 1 and the second forward winding coil unit 4 is greater than the width of the wire of the second reverse winding coil unit 3 and the wire of the first forward winding coil unit 2, the outer side of the stator core 9 is close to the first reverse winding coil unit 1 and the outer side of the stator core 9 is close to the second forward winding coil unit 4, and the inner side of the stator core 9 is close to the second reverse winding coil unit 3 and the inner side of the stator core 9 is close to the first forward winding coil unit 2.

Therefore, in any phase winding of the stator winding, the first parallel branch 5 and the second parallel branch 6 are connected in series by the first reverse winding coil unit 1 and the first forward winding coil unit 2, the head end 30 and the tail end 40 of the first parallel branch 5 are located on the two continuous vertical winding coils 10 on the same tooth of the stator core 9, the second parallel branch 6 is connected in series by the second forward winding coil unit 4 and the second reverse winding coil unit 3, the head end 30 and the tail end 40 of the second parallel branch 6 are located on the two continuous vertical winding coils 10 on the same tooth of the stator core 9, and the first parallel branch 5 and the second parallel branch 6 are arranged opposite to each other and arranged along the circumferential direction of the stator core 9 to form a ring-shaped one-phase winding.

The stator windings have similar phase structures, and when the phase windings are mounted on the stator core 9, the head ends 30 of the phase windings are close to each other, and the tail ends 40 of the phase windings are connected in a star shape or a delta shape for the purpose of arranging the structure nearby.

As shown in fig. 46, after the stator winding is installed, a slot wedge 11 is installed at the notch of each slot of the stator core 9, the slot wedge 11 is inserted into a gap between two sets of coils in the slot of the stator core 9, and the slot wedge 11 is tightly fitted with the two sets of coils, so that the slot wedges 11 form an integral circle under the support of the stator core 9, the radial rigidity is increased, the play of each coil is avoided, and meanwhile, the coil pop-up in the radial direction is avoided.

By adopting the technical scheme, the centralized stator winding is compact in structure and convenient to manufacture, each phase of winding comprises a plurality of layers of windings, each layer of winding is arranged along the circumferential direction of the stator core, the plurality of layers of windings are arranged along the radial direction of the stator core, the plurality of layers of windings adopt wires with two or more sizes, the width of the wires is gradually increased from the inner side to the outer side of the stator core, and the conductors are arranged by fully utilizing the space in the slots, so that the overall structure of the stator winding is compact, the slot filling rate of the stator is improved, and the power density of the whole machine is improved; each coil unit adopts a structure of more than two continuous vertical winding coils, so that the number of connection points of the windings is reduced, the problems of complex manufacturing process and low product reliability of products caused by more connection points are solved, the manufacturing process is simplified, and the product reliability is improved; the winding directions of the vertical winding continuous coils are the same, the cross-wire positive and negative winding structure is adopted, and the series-parallel connection combination is adopted, so that the head ends and the neutral points of the windings of all phases are respectively converged together, parallel branches are conveniently connected by the shortest path, the length of a line is effectively reduced, the complexity of connection is simplified, and the processing manufacturability and the processing efficiency of a product are improved; the T-shaped slot wedges are adopted, the slot wedges are tightly matched with the stator coils, and an integral round shape is formed under the support of the iron core, so that the radial rigidity is increased, and the coils are prevented from moving; the similar mortise and tenon structure that slot wedge and each coil cooperation formed can effectively avoid the coil to pop out in footpath.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a centralized stator, includes stator core and concentrated stator winding structure, centralized stator winding structure is located on the stator core, its characterized in that: the stator iron core is an integrated iron core;

the centralized stator winding comprises multi-phase windings, any phase winding comprises M layers of windings, the M layers of windings are arranged along the radial direction of the stator core, any layer of winding is arranged along the circumferential direction of the stator core, the conducting wires of each layer of winding are provided with various line widths, the width of the conducting wires of each layer of winding from the radial inner side to the radial outer side of the stator core is gradually increased, wherein M is more than or equal to 2, and M is an integer; and

the winding of any phase comprises a plurality of coil units, the coil units are connected in series to form a series branch, and any coil unit forms any winding of the layer; or, the plurality of coil units are connected in series in groups to form a plurality of parallel branches, and a plurality of coil units located on the same pitch circle of the stator core in each parallel branch form a layer winding;

the coil unit comprises P vertical winding continuous coils, P-1 overlines, a head end and a tail end, the P vertical winding continuous coils are arranged along the circumferential direction of the stator core and are arranged on the P tooth parts of the stator core, the adjacent vertical winding continuous coils are connected through the overlines, the head end and the tail end are respectively arranged on the vertical winding continuous coils at two ends of the coil unit, wherein P is more than or equal to 2, and P is an integer.

2. The centralized stator of claim 1, wherein: the serial connection mode of the coil units connected in series is reverse welding, same-direction welding or vertical welding.

3. The centralized stator of claim 1 or 2, wherein: the winding of any phase comprises at least two parallel branches, any parallel branch at least comprises an M1 coil unit and an M2 coil unit which are connected in series, the M2 coil unit and the M1 coil unit are a reverse winding coil unit I, a forward winding coil unit I, a reverse winding coil unit II or a forward winding coil unit II, and the cross-line winding directions of the M1 coil unit and the M2 coil unit are opposite or the same.

4. The centralized stator of claim 3, wherein: the stator core is used for being arranged in a stator core from the inside to the outside, the first reverse winding coil unit and the second reverse winding coil unit are all wound along the head end to the tail end in the anticlockwise winding mode, the first reverse winding coil unit and the second reverse winding coil unit are all wound along the head end to the tail end in the clockwise winding mode, the vertical winding direction of the continuous coil is the clockwise direction or the anticlockwise direction, the vertical winding direction of the first reverse winding coil unit is opposite to the vertical winding direction of the continuous coil of the second reverse winding coil unit, and the vertical winding direction of the first reverse winding coil unit is opposite to the vertical winding direction of the continuous coil of the second reverse winding coil unit.

5. The centralized stator of claim 4, wherein: the tail ends of the parallel branches of the windings of each phase are connected in parallel and then connected in a planetary or triangular manner, or the tail ends of the parallel branches of the windings of each phase are connected in series and then connected in a planetary or triangular manner.

6. The centralized stator of claim 1 or 2, wherein: the series branch of any phase winding at least comprises an M3 coil unit and an M4 coil unit which are connected in series, the M3 coil unit and the M4 coil unit are respectively a forward winding coil unit three or a backward winding coil unit three or a forward winding coil unit four or a backward winding coil unit four, and the cross-line winding directions of the M3 coil unit and the M4 coil unit are opposite.

7. The centralized stator of claim 6, wherein: use stator core inboard to outside direction as the reference direction, in the same direction as coil unit three with in the same direction as coil unit four the overline along the head end extremely the clockwise winding of tail end direction, contrary coil unit three with contrary coil unit four the overline along the head end extremely the anticlockwise winding of tail end direction, the winding direction of the wire of immediately winding continuous coil is anticlockwise or clockwise, just in the same direction as coil unit three immediately wind continuous coil with in the same direction as coil unit four immediately wind continuous coil's wire winding opposite direction, contrary coil unit three immediately wind continuous coil with contrary coil unit four immediately wind continuous coil's winding opposite direction.

8. The centralized stator of claim 1, wherein: the vertical winding continuous coil comprises a plurality of turns of coils connected in series, a turning part is arranged on any one turn of coil, and the turning part is in a large arc structure, a minor arc structure or a rounded rectangle structure.

9. The centralized stator of any one of claims 1-2, 4-5, 7-8, wherein: the centralized stator further comprises a slot wedge, the slot wedge is arranged at the notch of the stator core and is in inserted tight fit with two groups of coils in the slots of the stator core, the number of the slots of the stator core is N, N is a multiple of 3, N is larger than or equal to 12, and N is an integer.

10. An electrical machine comprising a concentrated stator according to any of claims 1-9.