CN116073549A - Flat wire motor stator, flat wire motor and vehicle - Google Patents

Abstract

The invention discloses a flat wire motor stator, which comprises a stator winding and a stator core, wherein the stator core is provided with a plurality of core slots, the stator winding comprises three-phase windings, each phase winding comprises one or more groups of winding circuits connected in parallel, each group of winding circuits comprises two parallel branches, and each branch comprises a plurality of coils connected in series; the number of layers of coils in each iron core groove increases in sequence from the groove bottom to the groove opening, coils of two branches are penetrated in each iron core groove, coils of an intermediate layer are arranged on two adjacent layers in a crossing mode and have the same span, coils of the innermost layer and the outermost layer are located on the same layer, each branch is arranged symmetrically around the center axis center of the stator core, and outgoing lines of the two branches are respectively arranged in the two adjacent iron core grooves and located on the same layer. A flat wire motor is also disclosed, including a flat wire motor stator. A vehicle is also disclosed that includes a flat wire motor. The flat wire motor stator, the flat wire motor and the vehicle have the advantages of good symmetry, reduced loss, increased efficiency, prolonged service life and the like.

Description

Flat wire motor stator, flat wire motor and vehicle

Technical Field

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

Background

With the rapid development of new energy automobile technology, the driving motor is used as the heart of the electric automobile, and the requirements on the performance of the driving motor are higher and higher. At present, high speed, light weight and high efficiency become the development trend of driving motors, and have higher requirements on power density, high-efficiency area and heat dissipation capacity of the motors.

The stator winding can be divided into round wires and flat wires, compared with the round wire winding, the flat wire winding can effectively improve the slot fullness rate of the motor, reduce the copper consumption of the motor so as to provide motor efficiency, and simultaneously reduce the height of the end part of the motor winding, thereby reducing the volume of the motor and providing power/torque density. However, the flat wire winding has an inherent skin effect phenomenon, and particularly has obvious skin effect in a high-speed motor. To reduce the skin effect, the number of conductors in the stator slot is generally increased, such as 4 layers, 6 layers, 8 layers, etc.

Because conductors of each parallel branch are distributed at different positions of the inner diameter of the stator slot, especially when the number of slots of each phase of each pole of the motor is odd and the number of branches is even, the symmetry is difficult to realize, if each branch is asymmetric, the counter potential, the resistance and the inductance can be greatly different, thereby forming a circulation, increasing the additional loss and the efficiency, simultaneously causing the local overtemperature of the motor winding and reducing the service life of the motor.

The coil arrangement mode of the existing motor with odd slots per pole and even branches generally has the following problems:

1) Each branch is asymmetric, current circulation of the branch exists, and copper consumption is increased;

2) The three-phase outgoing line of the motor is complex, and the range of the three-phase outgoing line under the branch is large;

3) The number of the lines is large, a large number of special-shaped coils exist, a large number of dies are needed, the cost is increased, and meanwhile, the wire insertion is difficult.

Disclosure of Invention

The invention aims to solve the technical problems of overcoming the defects of the prior art and providing a flat wire motor stator, a flat wire motor and a vehicle, wherein the flat wire motor stator can increase the symmetry of a branch, eliminate the circulation of the current of the branch, reduce the loss, increase the efficiency, prolong the service life and lead wires in a simple way.

In order to solve the technical problems, the invention adopts the following technical scheme:

the flat wire motor stator comprises a stator winding and a stator core, wherein a plurality of core slots are formed in the circumferential direction of the stator core, the stator winding comprises three-phase windings, each phase winding comprises one or more groups of winding circuits which are connected in parallel, each group of winding circuits comprises two parallel branches, and each branch comprises a plurality of coils which are sequentially arranged on the core slots in the circumferential direction of the stator core and are connected in series with each other; the number of layers of coils in each iron core groove is increased in sequence from the groove bottom to the groove opening, two coils of branches are penetrated in each iron core groove, coils in the middle layer of the iron core groove are arranged on two adjacent layers in a crossing mode and have the same span, coils in the innermost layer and the outermost layer of the iron core groove are all located on the same layer, each branch is symmetrically arranged around the center axis center of the stator iron core, and outgoing lines of each branch are respectively arranged in two adjacent iron core grooves and located on the same layer.

As a further improvement of the above technical scheme:

the coil comprises a coil main body and a bending part, wherein the coil main body comprises two groove penetrating parts which are arranged in parallel with each other and a connecting part which is connected with one end of each groove penetrating part, and the bending part is positioned at the other end of each groove penetrating part and forms a welding end.

The two through slot parts positioned at the innermost layer and the outermost layer of the iron core slot are positioned at the same layer.

The coils in the middle layer of the iron core slot are divided into a plurality of groups of coil groups which are sequentially arranged at intervals around the circumference of the stator iron core and are arranged layer by layer along the depth direction of the iron core slot, the adjacent coils in each coil group have the same circumferential spacing of the stator iron core, and the adjacent coil groups have the same circumferential inclination direction around the stator iron core.

The two bending parts of the coils positioned at the middle layer and the innermost layer of the iron core slot are respectively bent towards two sides of the width direction of the coil main body, and the two bending parts of the coils positioned at the outermost layer of the iron core slot are bent towards one side of the width direction of the coil main body.

The number of the iron core slots is 72, and 6 layers are arranged in the iron core slots; the two parallel branches of each group of winding circuits are respectively set as a first branch A and a second branch B, wherein the first branch A comprises coils A1-A2, a3-A4, a5-A6, a7-A8, a9-A10 and a11-A12; the second branch B comprises coils B1-B2, B3-B4, B5-B6, B7-B8, B9-B10 and B11-B12;

the two through slots of the coils a1-A2 and B1-B2 are respectively positioned at the 2 nd layer and the 3 rd layer of the bottom of the slot of the iron core along the slot opening direction;

the two through slots a3-A4 and B3-B4 are respectively positioned at the 4 th layer and the 5 th layer of the iron core slot;

the two slot penetrating parts of a5-A6 and B5-B6 are positioned on the 6 th layer of the iron core slot;

the two through slots a7-A8 and B7-B8 are respectively positioned at the 5 th layer and the 4 th layer of the iron core slot;

the two through slots a9-A10 and B9-B10 are respectively positioned at the 3 rd layer and the 2 nd layer of the iron core slot;

the two slot penetrating parts of a11-A12 and B11-B12 are positioned on the 1 st layer of the iron core slot;

A1-A2 is connected with a3-A4 at a welding end, a3-A4 coil is connected with a5-A6 at a welding end, a5-A6 is connected with a7-A8 at a welding end, a7-A8 is connected with a9-A10 at a welding end, a9-A10 is connected with a11-A12 at a welding end, and so on;

B1-B2 is connected with B3-B4 at a welding end, B3-B4 coil is connected with B5-B6 at a welding end, B5-B6 is connected with B7-B8 at a welding end, B7-B8 is connected with B9-B10 at a welding end, B9-B10 is connected with B11-B12 at a welding end, and so on;

the coil connection sequence is from layer 1 to layer 6 in turn, and then from layer 6 to layer 1 in turn, and the cycle is repeated.

And the outgoing lines of the branches are positioned on the 1 st layer or the 2 nd layer of the iron core groove.

The center point of the branch is positioned on the 1 st layer of the iron core slot.

A flat wire motor comprises the flat wire motor stator.

A vehicle comprises the flat wire motor.

Compared with the prior art, the invention has the advantages that:

according to the flat wire motor stator, the coils at the middle layer of the iron core groove are arranged in a crossing mode on two adjacent layers and have the same span, the coils at the innermost layer and the outermost layer of the iron core groove are all arranged on the same layer, and all branches are symmetrically arranged around the center of the center shaft of the stator iron core, so that the symmetry of the branches is improved, the current circulation of the branches is eliminated, and the copper consumption is reduced. Meanwhile, coils of all the branches are sequentially arranged on the iron core slots in the circumferential direction of the stator iron core and are mutually connected in series, and winding forms of all the branches are formed in such a way that the coil connection sequence is obliquely connected from the innermost layer to the outermost layer of the iron core slots and then reversely connected from the outermost layer to the innermost layer, so that the central symmetry of each branch is ensured, the loss is reduced, the efficiency is increased, and the service life is prolonged. The outgoing lines of each branch are respectively arranged in two adjacent iron core grooves and are positioned on the same layer, so that the outgoing lines of the three-phase outgoing lines of the motor are adjacent to each other, the medicine range of the three-phase outgoing lines under the two branches is reduced, and the outgoing lines are simpler.

The flat wire motor comprises the flat wire motor stator, has the advantages as described above, and has the advantages of simple integral structure, small volume and high working stability.

The vehicle of the invention, comprising the flat wire motor described above, also has the advantages described above for the flat wire motor stator.

Drawings

Fig. 1 is a schematic perspective view of a first perspective view of a stator for a flat wire motor according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second perspective view of a flat wire motor stator according to a first embodiment of the present invention.

Fig. 3 is a schematic view of a first U-shaped coil structure of a flat wire motor stator according to a first embodiment of the present invention.

Fig. 4 is a schematic view of a second type of U-shaped coil of a flat wire motor stator embodiment of the present invention.

Fig. 5 is a schematic structural view of a third U-shaped coil of a flat wire motor stator according to a first embodiment of the present invention.

Fig. 6 is a schematic structural view of a fourth U-shaped coil of a flat wire motor stator according to a first embodiment of the present invention.

Fig. 7 is a schematic view of a fifth U-shaped coil of a first embodiment of a flat wire motor stator according to the present invention.

Fig. 8 is a schematic structural view of a sixth U-shaped coil of a flat wire motor stator according to a first embodiment of the present invention.

Fig. 9 is a schematic layout of a stator winding of a flat wire motor stator according to the present invention in the first embodiment.

Fig. 10 is a schematic perspective view of a first perspective view of a stator of a flat wire motor according to a second embodiment of the present invention.

Fig. 11 is a schematic perspective view of a second perspective view of a stator of a flat wire motor according to a second embodiment of the present invention.

Fig. 12 is a schematic layout of a stator winding of a flat wire motor stator according to the present invention in the second embodiment.

The reference numerals in the drawings denote:

1. a stator winding; 11. a coil main body; 111. a groove penetrating part; 112. a connection part; 12. a bending part; 2. a stator core; 3. and the iron core slot.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific examples.

Embodiment one:

fig. 1 to 9 show an embodiment of a flat wire motor stator according to the present invention, which is shown in fig. 1 and 2, and includes a stator winding 1 and a stator core 2, wherein a plurality of core slots 3 are provided in the circumferential direction of the stator core 2, the stator winding 1 includes three-phase windings, each phase winding includes one or more groups of parallel winding lines, each group of winding lines includes two parallel branches, and each branch includes a plurality of coils which are sequentially arranged on the core slots 3 in the circumferential direction of the stator core 2 and are connected in series with each other; the number of layers of coils in each iron core slot 3 increases in turn from the slot bottom to the slot opening, two coils of branches are penetrated in each iron core slot 3, coils at the middle layer of the iron core slot 3 are arranged on two adjacent layers in a crossing manner and have the same span, coils at the innermost layer and the outermost layer of the iron core slot 3 are all arranged on the same layer, each branch is symmetrically arranged around the center axis center of the stator iron core 2, and outgoing lines of each branch are respectively arranged in two adjacent iron core slots 3 and are positioned on the same layer.

The coil in the middle layer of the iron core groove 3 is spanned on two adjacent layers and has the same span, the coils in the innermost layer and the outermost layer of the iron core groove 3 are positioned on the same layer, and all the branches are symmetrically arranged around the center of the center axis of the stator iron core 2, so that the symmetry of the branches is increased, the current circulation of the branches is eliminated, and the copper consumption is reduced. Meanwhile, the coils of each branch are sequentially arranged on the iron core slot 3 in the circumferential direction of the stator iron core 2 and are mutually connected in series, and the winding forms of the branches are that the coil connection sequence is obliquely connected from the innermost layer to the outermost layer of the iron core slot 3 and then reversely connected from the outermost layer to the innermost layer, so that the central symmetry of each branch is ensured, the loss is reduced, the efficiency is increased, and the service life is prolonged. The outgoing lines of each branch are respectively arranged in the two adjacent iron core grooves 3 and are positioned on the same layer, so that the three-phase outgoing lines of the motor are adjacent to each other, the medicine range of the three-phase outgoing lines under the two branches is reduced, and the outgoing lines are simpler.

In this embodiment, as shown in fig. 3 to 8, the coil includes a coil body 11 and a bending portion 12, the coil body 11 includes two through-slot portions 111 arranged parallel to each other and a connecting portion 112 connected to one end of the two through-slot portions 111, and the bending portion 12 is located at the other end of the two through-slot portions 111 and forms a welding end. The two through groove portions 111 are arranged parallel to each other. The connection portion 112 is V-shaped or arc-shaped, and makes the coil body 11U-shaped or V-shaped. Because each coil adopts the same type (U type or V type), the opposite coil and the jumper coil are omitted, and various coils are reduced, so that the assembly and the mass production are convenient, and the production efficiency is improved.

In this embodiment, the two slot penetrating portions 111 located at the innermost and outermost layers of the core slot 3 are located at the same layer. Is convenient for assembly and batch production, and improves the production efficiency.

In this embodiment, two slot penetrating portions 111 of the coils located in the middle layer of the core slot 3 are located in two adjacent layers respectively, and each coil located in the middle layer of the core slot 3 is divided into a plurality of groups of coil groups which are sequentially arranged at intervals around the circumference of the stator core 2 and are arranged layer by layer along the depth direction of the core slot 3, adjacent coils in each coil group have the same circumferential spacing of the stator core 2, and adjacent coil groups have the same circumferential inclination direction around the stator core 2. Therefore, the winding forms of the branches are that the coil connection sequence is obliquely connected from the innermost layer to the outermost layer of the iron core slot 3 and then reversely connected from the outermost layer to the innermost layer, so that the central symmetry of each branch is ensured, the loss is reduced, the efficiency is increased, and the service life is prolonged.

In this embodiment, as shown in fig. 6 to 8, two bending portions 12 of the coil located in the middle layer and the innermost layer of the core slot 3 are respectively bent toward both sides in the width direction of the coil body 11, and two bending portions 12 of the coil located in the outermost layer of the core slot 3 are bent toward one side in the width direction of the coil body 11.

In this embodiment, as shown in fig. 9, the number of core slots 3 is 72, and 6 layers are provided therein; the two parallel branches of each group of winding circuits are respectively set as a first branch A and a second branch B, wherein the first branch A comprises coils A1-A2, a3-A4, a5-A6, a7-A8, a9-A10 and a11-A12; the second branch B comprises coils B1-B2, B3-B4, B5-B6, B7-B8, B9-B10, B11-B12;

the two through slot parts 111 of the coils a1-A2 and B1-B2 are respectively positioned on the 2 nd layer and the 3 rd layer of the inner slot bottom of the iron core slot 3 along the slot opening direction;

the two slot penetrating parts 111 of a3-A4 and B3-B4 are respectively positioned at the 4 th layer and the 5 th layer of the iron core slot 3;

the two slot penetrating parts 111 of a5-A6 and B5-B6 are positioned on the 6 th layer of the iron core slot 3;

the two slot penetrating parts 111 of a7-A8 and B7-B8 are respectively positioned at the 5 th layer and the 4 th layer of the iron core slot 3;

the two slot penetrating parts 111 of a9-A10 and B9-B10 are respectively positioned at the 3 rd layer and the 2 nd layer of the iron core slot 3;

the two slot penetrating parts 111 of a11-A12 and B11-B12 are positioned on the 1 st layer of the iron core slot 3;

A1-A2 is connected with a3-A4 at a welding end, a3-A4 coil is connected with a5-A6 at a welding end, a5-A6 is connected with a7-A8 at a welding end, a7-A8 is connected with a9-A10 at a welding end, a9-A10 is connected with a11-A12 at a welding end, and so on;

B1-B2 is connected with B3-B4 at a welding end, B3-B4 coil is connected with B5-B6 at a welding end, B5-B6 is connected with B7-B8 at a welding end, B7-B8 is connected with B9-B10 at a welding end, B9-B10 is connected with B11-B12 at a welding end, and so on;

the coil connection sequence is from layer 1 to layer 6 in turn, and then from layer 6 to layer 1 in turn, and the cycle is repeated.

a11-A12 to a19-A20, a21-A22 to a29-A30, a31-A32 to a39-A40, a41-A42 to a49-A40, a51-A52 to a59-A60, a61-A62 to a69-A70 are all arranged in a similar manner to A1-A2 to a 9-A10;

B11-B12 to B19-B20, B21-B22 to B29-B30, B31-B32 to B39-B40, B41-B42 to B49-B40, B51-B52 to B59-B60, B61-B62 to B69-B70 are all arranged in a similar manner to B1-B2 to B9-B10.

In this embodiment, the outgoing line of the branch is located at layer 2 of the core slot 3.

In this embodiment, the center point of the branch is located at layer 1 of the core slot 3.

The flat wire motor stator has the advantages that the coils are all formed by U-shaped coils, and the opposite coils and the jumper coils are omitted, so that mass production is facilitated; the U-shaped coil type is reduced, and the mass production and the manufacturing are convenient. The potential difference is small in the case where there is a presence in the adjacent core slot 3 between the outgoing line and the neutral point between the different phases.

Specifically, the flat wire motor stator of the present embodiment is a 72-slot 8-pole 3-phase 2-leg 2 flat wire winding structure, the 72 core slots 3 are sequentially denoted as 1 st to 72 nd slots along the circumferential direction of the stator core 2,

first branch a (branch 1 as shown in fig. 9):

a1-A2 are respectively positioned on the 2 nd layer of the 10 th groove and the 3 rd layer of the 19 th groove, a3-A4 are respectively positioned on the 4 th layer of the 28 th groove and the 5 th layer of the 37 th groove, a5-A6 are respectively positioned on the 6 th layer of the 46 th groove and the 6 th layer of the 57 th groove, a7-A8 are respectively positioned on the 5 th layer of the 48 th groove and the 4 th layer of the 39 th groove, a9-A10 are respectively positioned on the 3 rd layer of the 30 th groove and the 2 nd layer of the 21 st groove, and a11-A12 are respectively positioned on the 1 st layer of the 12 th groove and the 1 st layer of the 3 rd groove;

a13-A14 is located at the 2 nd layer of the 12 th groove and the 3 rd layer of the 21 st groove, a15-A16 is located at the 4 th layer of the 30 th groove and the 5 th layer of the 39 th groove, a17-A18 is located at the 6 th layer of the 48 th groove and the 6 th layer of the 56 th groove, a19-A20 is located at the 5 th layer of the 47 th groove and the 4 th layer of the 38 th groove, a21-A22 is located at the 3 rd layer of the 29 th groove and the 2 nd layer of the 20 th groove, a23-A24 is located at the 1 st layer of the 11 th groove and the 1 st layer of the 20 th groove, respectively;

a25-A26 is located at the 2 nd layer of the 29 th groove and the 3 rd layer of the 38 th groove, a27-A28 is located at the 4 th layer of the 47 th groove and the 5 th layer of the 56 th groove, a29-A30 is located at the 6 th layer of the 65 th groove and the 6 th layer of the 1 st groove, a31-A32 is located at the 5 th layer of the 64 th groove and the 4 th layer of the 55 th groove, a33-A34 is located at the 3 rd layer of the 46 th groove and the 2 nd layer of the 37 th groove, a35-A36 is located at the 1 st layer of the 28 th groove and the 1 st layer of the 37 th groove;

a37-A38 is located at the 2 nd layer of the 46 th groove and the 3 rd layer of the 55 th groove, a39-A40 is located at the 4 th layer of the 64 th groove and the 5 th layer of the 1 st groove, a41-A42 is located at the 6 th layer of the 10 th groove and the 6 th layer of the 21 st groove, a43-A44 is located at the 5 th layer of the 12 th groove and the 4 th layer of the 3 rd groove, a45-A46 is located at the 3 rd layer of the 66 th groove and the 2 nd layer of the 57 th groove; a47-A48 is located in layer 1 of groove 48 and layer 1 of groove 39, respectively;

a49-A50 is located at the 2 nd layer of the 48 th groove and the 3 rd layer of the 57 th groove, a51-A52 is located at the 4 th layer of the 66 th groove and the 5 th layer of the 3 rd groove, a53-A54 is located at the 6 th layer of the 12 th groove and the 6 th layer of the 20 th groove, a55-A56 is located at the 5 th layer of the 11 th groove and the 4 th layer of the 2 nd groove, a57-A58 is located at the 3 rd layer of the 65 th groove and the 2 nd layer of the 56 th groove, respectively; a59-A60 is located in layer 1 of groove 47 and layer 1 of groove 56, respectively;

a61-A62 is located at the 2 nd layer of the 65 th groove and the 3 rd layer of the 2 nd groove, a63-A64 is located at the 4 th layer of the 11 th groove and the 5 th layer of the 20 th groove, a65-A66 is located at the 6 th layer of the 29 th groove and the 6 th layer of the 37 th groove, a67-A68 is located at the 5 th layer of the 28 th groove and the 4 th layer of the 19 th groove, a69-A70 is located at the 3 rd layer of the 10 th groove and the 2 nd layer of the 1 st groove, respectively; a71-A72 are located in layer 1 of the 64 th groove and layer 1 of the 1 st groove, respectively;

a second branch B (branch 2 as shown in fig. 9):

B1-B2 are respectively positioned on the 2 nd layer of the 11 th groove and the 3 rd layer of the 20 th groove, B3-B4 are respectively positioned on the 4 th layer of the 29 th groove and the 5 th layer of the 38 th groove, B5-B6 are respectively positioned on the 6 th layer of the 47 th groove and the 6 th layer of the 55 th groove, B7-B8 are respectively positioned on the 5 th layer of the 46 th groove and the 4 th layer of the 37 th groove, B9-B10 are respectively positioned on the 3 rd layer of the 28 th groove and the 2 nd layer of the 19 th groove, and B11-B12 are respectively positioned on the 1 st layer of the 10 th groove and the 1 st layer of the 19 th groove;

B13-B14 is located at the 2 nd and 3 rd layers of the 37 th grooves of the 28 th groove, B15-B16 is located at the 4 th and 5 th layers of the 55 th grooves of the 46 th groove, B17-B18 is located at the 6 th and 6 th layers of the 3 rd grooves of the 64 th groove, B19-B20 is located at the 5 th and 4 th layers of the 57 th grooves of the 66 th groove, B21-B22 is located at the 3 rd and 2 nd layers of the 39 th grooves of the 48 th groove, B23-B24 is located at the 1 st and 1 st layers of the 21 st grooves of the 30 th groove, respectively;

B25-B26 is located at layer 2 of slot 30 and layer 3 of slot 39 respectively, B27-B28 is located at layer 4 of slot 48 and layer 5 of slot 57 respectively, B29-B30 is located at layer 6 of slot 66 and layer 6 of slot 2 respectively, B31-B32 is located at layer 5 of slot 65 and layer 4 of slot 56 respectively, B33-B34 is located at layer 3 of slot 47 and layer 2 of slot 38 respectively, B35-B36 is located at layer 1 of slot 29 and layer 1 of slot 38 respectively;

B37-B38 is respectively positioned on the layer 2 of the groove 47 and the layer 3 of the groove 56, B39-B40 is respectively positioned on the layer 4 of the groove 65 and the layer 5 of the groove 2, B41-B42 is respectively positioned on the layer 6 of the groove 11 and the layer 6 of the groove 19, B43-B44 is respectively positioned on the layer 5 of the groove 10 and the layer 4 of the groove 1, and B45-B46 is respectively positioned on the layer 3 of the groove 64 and the layer 2 of the groove 55; B47-B48 are located in layer 1 of groove 46 and layer 1 of groove 55, respectively;

B49-B50 is located at the 2 nd layer of the 64 th groove and the 3 rd layer of the 1 st groove, B51-B52 is located at the 4 th layer of the 10 th groove and the 5 th layer of the 19 th groove, B53-B54 is located at the 6 th layer of the 28 th groove and the 6 th layer of the 39 th groove, B55-B56 is located at the 5 th layer of the 30 th groove and the 4 th layer of the 21 st groove, B57-B58 is located at the 3 rd layer of the 12 th groove and the 2 nd layer of the 3 rd groove; b59-B60 is located in layer 1 of 66 th slot and layer 1 of 57 th slot, respectively;

B61-B62 are respectively positioned on the 2 nd layer of the 66 th groove and the 3 rd layer of the 3 rd groove, B63-B64 are respectively positioned on the 4 th layer of the 12 th groove and the 5 th layer of the 21 st groove, B65-B66 are respectively positioned on the 6 th layer of the 30 th groove and the 6 th layer of the 38 th groove, B67-B68 are respectively positioned on the 5 th layer of the 29 th groove and the 4 th layer of the 20 th groove, and B69-B70 are respectively positioned on the 3 rd layer of the 11 th groove and the 2 nd layer of the 2 nd groove; B71-B72 are located in layer 1 of groove 65 and layer 1 of groove 2, respectively.

The outgoing lines of the branches are all positioned on the 2 nd layer of the 10 th, 11 th, 13 th, 14 th, 16 th and 17 th grooves, and the central points are positioned on the 1 st layer of the 1 st, 2 nd, 4 th, 5 th, 7 th and 8 th grooves.

In order to solve the technical problems, the invention provides a winding arrangement and a wiring mode, which reduces the line type, the non-abnormal line type, the complexity of the manufacturing process and the production convenience by adopting the winding arrangement mode of combining coils of the same span and different types, and can eliminate a series of problems caused by the asymmetry of each branch, so that each branch can be symmetrical on a groove and a layer, and meanwhile, the structure of a busbar is simplified, the structure is compact, and the space of an end part is saved.

Taking the case that the number of the 3-phase branches of the 72 slots is 2 and the number of the welding ends is taken as an outgoing line, the number of layers of the slot coil increases from the slot bottom to the slot coil sequentially, the flat wire motor stator is shown in fig. 1 and 2, and the phase winding wiring diagram is shown in fig. 9. Branch 1: a-a, branch 2: B-B. The number of grooves of each phase of each pole is 3, the number of branches is 2, and the branches are symmetrical, so that the first layer is a U-shaped coil with the same layer, the second layer and the third layer are U-shaped coils with the same span, the third layer and the fourth layer are U-shaped coils with the same span, and the sixth layer is a U-shaped coil with the same layer.

For example, a41-A42, B17-B18, B53-B54, a5-A6, etc. are first U-shaped coils, as shown in FIG. 3. a29-A30, B29-B30, a17-A18, B5-B6, a65-A66, B65-B66, B41-B42, B53-B54 are second identical span U-shaped coils, as shown in FIG. 4. B51-B52, a63-A64, B63-B64 are third coils of the same span, as shown in FIG. 5. A1-A2, B1-B2, a13-A14 are fourth coils of the same span, as shown in FIG. 6. a11-A12, B11-B12, a23-A24 are fifth coils of the same span, as shown in FIG. 7.

The coil a1-A2 and the coil a3-A4 of the branch 1 are connected through the twisting head welding, the coil a3-A4 and the coil a5-A6 are connected through the twisting head welding, the coil a5-A6 and the coil a7-A8 are connected through the twisting head welding, the connection sequence of the coils is from the layer 2 to the layer 3, the layer 3 to the layer 4, the layer 5 to the layer 6 and the layer 6, the same layer is walked on the layer 6, the layer 6 is returned to the layer 1, and the circulation is repeated. And so on to branch 2.

The motor stator includes 6 coils as shown in fig. 3 to 8. The coils are transposed through the coils on the same layer, so that phase differences among different branches are eliminated, and each branch is guaranteed to be completely symmetrical.

The motor stator has 6 neutral points which are connected through copper bars welded on the side face, and the structure is simple.

The outgoing lines of each branch are respectively arranged in two adjacent iron core slots 3 and positioned at the innermost layer (namely, the first layer) of the iron core slots 3, and the central points of each branch are respectively arranged in two adjacent iron core slots 3 and positioned at the secondary inner layer (namely, the second layer) of the iron core slots 3.

Embodiment two:

fig. 10 to 12 show another embodiment of the flat wire motor stator of the present invention, which is basically identical in structure to the first embodiment except that: the outgoing lines of the branches are all positioned on the 1 st layer of the iron core slot 3.

Specifically, the flat wire motor stator of the present embodiment is a 72-slot 8-pole 3-phase 2-leg 2 flat wire winding structure, the 72 core slots 3 are sequentially denoted as 1 st to 72 nd slots along the circumferential direction of the stator core 2,

first branch a (branch 1 as shown in fig. 12):

a1-A2 are respectively positioned on the 2 nd layer of the 10 th groove and the 3 rd layer of the 19 th groove, a3-A4 are respectively positioned on the 4 th layer of the 28 th groove and the 5 th layer of the 37 th groove, a5-A6 are respectively positioned on the 6 th layer of the 46 th groove and the 6 th layer of the 56 th groove, a7-A8 are respectively positioned on the 5 th layer of the 47 th groove and the 4 th layer of the 38 th groove, a9-A10 are respectively positioned on the 3 rd layer of the 29 th groove and the 2 nd layer of the 20 th groove, and a11-A12 are respectively positioned on the 1 st layer of the 11 th groove and the 1 st layer of the 20 th groove;

a13-A14 is located at the 2 nd layer of the 29 th groove and the 3 rd layer of the 38 th groove, a15-A16 is located at the 4 th layer of the 47 th groove and the 5 th layer of the 56 th groove, a17-A18 is located at the 6 th layer of the 65 th groove and the 6 th layer of the 3 rd groove, a19-A20 is located at the 5 th layer of the 66 th groove and the 4 th layer of the 57 th groove, a21-A22 is located at the 3 rd layer of the 48 th groove and the 2 nd layer of the 39 th groove, a23-A24 is located at the 1 st layer of the 30 th groove and the 1 st layer of the 21 st groove, respectively;

a25-A26 is located at the 2 nd layer of the 30 th groove and the 3 rd layer of the 39 th groove, a27-A28 is located at the 4 th layer of the 48 th groove and the 5 th layer of the 57 th groove, a29-A30 is located at the 6 th layer of the 66 th groove and the 6 th layer of the 1 st groove, a31-A32 is located at the 5 th layer of the 64 th groove and the 4 th layer of the 55 th groove, a33-A34 is located at the 3 rd layer of the 46 th groove and the 2 nd layer of the 37 th groove, a35-A36 is located at the 1 st layer of the 28 th groove and the 1 st layer of the 37 th groove;

a37-A38 is positioned on the layer 2 of the groove 46 and the layer 3 of the groove 55 respectively, a39-A40 is positioned on the layer 4 of the groove 64 and the layer 5 of the groove 1 respectively, a41-A42 is positioned on the layer 6 of the groove 10 and the layer 6 of the groove 20 respectively, a43-A44 is positioned on the layer 5 of the groove 11 and the layer 4 of the groove 2 respectively, and a45-A46 is positioned on the layer 3 of the groove 65 and the layer 2 of the groove 56 respectively; a47-A48 are located in layer 1 of the 47 th slot and layer 1 of the 56 th slot, respectively;

a49-A50 is located at the 2 nd layer of the 65 th groove and the 3 rd layer of the 2 nd groove, a51-A52 is located at the 4 th layer of the 11 th groove and the 5 th layer of the 20 th groove, a53-A54 is located at the 6 th layer of the 29 th groove and the 6 th layer of the 39 th groove, a55-A56 is located at the 5 th layer of the 30 th groove and the 4 th layer of the 21 st groove, a57-A58 is located at the 3 rd layer of the 12 th groove and the 2 nd layer of the 3 rd groove; a59-A60 is located in layer 1 of 66 th slot and layer 1 of 57 th slot, respectively;

a61-A62 is located at the 2 nd layer of the 64 th groove and the 3 rd layer of the 3 rd groove, a63-A64 is located at the 4 th layer of the 12 th groove and the 5 th layer of the 21 st groove, a65-A66 is located at the 6 th layer of the 30 th groove and the 6 th layer of the 37 th groove, a67-A68 is located at the 5 th layer of the 28 th groove and the 4 th layer of the 19 th groove, a69-A70 is located at the 3 rd layer of the 10 th groove and the 2 nd layer of the 1 st groove, respectively; a71-A72 are located in layer 1 of the 64 th groove and layer 1 of the 1 st groove, respectively;

a second branch B (branch 2 as shown in fig. 12):

B1-B2 are respectively positioned on the 2 nd layer of the 11 th groove and the 3 rd layer of the 20 th groove, B3-B4 are respectively positioned on the 4 th layer of the 29 th groove and the 5 th layer of the 38 th groove, B5-B6 are respectively positioned on the 6 th layer of the 47 th groove and the 6 th layer of the 57 th groove, B7-B8 are respectively positioned on the 5 th layer of the 48 th groove and the 4 th layer of the 39 th groove, B9-B10 are respectively positioned on the 3 rd layer of the 30 th groove and the 2 nd layer of the 21 st groove, and B11-B12 are respectively positioned on the 1 st layer of the 12 th groove and the 1 st layer of the 3 rd groove;

B13-B14 are respectively positioned on the layer 2 of the groove 12 and the layer 3 of the groove 21, B15-B16 are respectively positioned on the layer 4 of the groove 30 and the layer 5 of the groove 39, B17-B18 are respectively positioned on the layer 6 of the groove 48 and the layer 6 of the groove 55, B19-B20 are respectively positioned on the layer 5 of the groove 46 and the layer 4 of the groove 37, B21-B22 are respectively positioned on the layer 3 of the groove 28 and the layer 2 of the groove 19, and B23-B24 are respectively positioned on the layer 1 of the groove 10 and the layer 1 of the groove 19;

B25-B26 is located at the 2 nd layer of the 28 th groove and the 3 rd layer of the 37 th groove, B27-B28 is located at the 4 th layer of the 46 th groove and the 5 th layer of the 55 th groove, B29-B30 is located at the 6 th layer of the 64 th groove and the 6 th layer of the 2 nd groove, B31-B32 is located at the 5 th layer of the 65 th groove and the 4 th layer of the 56 th groove, B33-B34 is located at the 3 rd layer of the 47 th groove and the 2 nd layer of the 38 th groove, B35-B36 is located at the 1 st layer of the 29 th groove and the 1 st layer of the 38 th groove;

B37-B38 is respectively positioned on the layer 2 of the groove 47 and the layer 3 of the groove 56, B39-B40 is respectively positioned on the layer 4 of the groove 65 and the layer 5 of the groove 2, B41-B42 is respectively positioned on the layer 6 of the groove 11 and the layer 6 of the groove 21, B43-B44 is respectively positioned on the layer 5 of the groove 12 and the layer 4 of the groove 3, and B45-B46 is respectively positioned on the layer 3 of the groove 66 and the layer 2 of the groove 57; B47-B48 are located in layer 1 of the 48 th slot and layer 1 of the 39 th slot, respectively;

B49-B50 is located at the 2 nd layer of the 48 th groove and the 3 rd layer of the 57 th groove, B51-B52 is located at the 4 th layer of the 66 th groove and the 5 th layer of the 3 rd groove, B53-B54 is located at the 6 th layer of the 12 th groove and the 6 th layer of the 19 th groove, B55-B56 is located at the 5 th layer of the 10 th groove and the 4 th layer of the 1 st groove, B57-B58 is located at the 3 rd layer of the 64 th groove and the 2 nd layer of the 55 th groove; b59-B60 is located in layer 1 of groove 46 and layer 1 of groove 55, respectively;

B61-B62 are respectively positioned on the layer 2 of the 64 th groove and the layer 3 of the 1 st groove, B63-B64 are respectively positioned on the layer 4 of the 10 th groove and the layer 5 of the 19 th groove, B65-B66 are respectively positioned on the layer 6 of the 28 th groove and the layer 6 of the 38 th groove, B67-B68 are respectively positioned on the layer 5 of the 29 th groove and the layer 4 of the 20 th groove, B69-B70 are respectively positioned on the layer 3 of the 11 th groove and the layer 2 of the 2 nd groove, and B71-B72 are respectively positioned on the layer 1 of the 65 th groove and the layer 1 of the 2 nd groove;

other branches and so on.

The center points of the branches are positioned at the 1 st layer of the 64 th, 65 th, 67 th, 68 th, 70 th and 71 th grooves, and the outgoing lines are positioned at the 1 st layer of the 1 st, 2 nd, 4 th, 5 th, 7 th and 8 th grooves.

The a1-A2 coil and the a3-A4 coil of the branch 1 are connected through twisting welding, the a3-A4 coil and the a5-A6 coil are connected through twisting welding, the a5-A6 coil and the a7-A8 coil are connected through twisting welding, the connection sequence of the coils is from the layer 2 to the layer 3, the layer 3 to the layer 4, the layer 5 to the layer 6 and the layer 6, the same layer is walked on the layer 6, the layer 5 is returned to the layer 1, and the cycle is repeated. And so on to branch 2.

The outgoing lines of each branch are respectively arranged in two adjacent iron core slots 3 and positioned at the innermost layer (namely, the first layer) of the iron core slots 3, and the central points of each branch are respectively arranged in two adjacent iron core slots 3 and positioned at the secondary inner layer (namely, the second layer) of the iron core slots 3.

Embodiment III:

the flat wire motor of the present embodiment includes the flat wire motor stator of the first embodiment or the second embodiment. The flat wire motor also comprises the flat wire motor stator, has the advantages as the flat wire motor stator, and has the advantages of simple integral structure, small volume and high working stability.

Embodiment four:

the vehicle of the present embodiment includes the flat wire motor of the third embodiment. The vehicle of the invention also comprises a flat wire motor stator as described above, also having the advantages described above for a flat wire motor stator.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a flat wire motor stator, includes stator winding (1) and stator core (2), the circumference of stator core (2) is equipped with a plurality of iron core slots (3), stator winding (1) include three-phase winding, its characterized in that: each phase winding comprises one or more groups of parallel winding circuits, each group of winding circuits comprises two parallel branches, and each branch comprises a plurality of coils which are sequentially arranged on iron core slots (3) in the circumferential direction of a stator iron core (2) and are mutually connected in series; the number of layers of coils in each iron core groove (3) is increased in sequence from the groove bottom to the groove opening, two coils of branches are penetrated in each iron core groove (3), coils in the middle layer of the iron core groove (3) are arranged in a crossing mode on two adjacent layers and have the same span, coils in the innermost layer and the outermost layer of the iron core groove (3) are located on the same layer, each branch is arranged around the center axis of the stator iron core (2) in a central symmetry mode, and outgoing lines of each branch are respectively arranged in the two adjacent iron core grooves (3) and located on the same layer.

2. The flat wire motor stator of claim 1, wherein: the coil comprises a coil main body (11) and bending parts (12), wherein the coil main body (11) comprises two groove penetrating parts (111) which are arranged in parallel with each other and a connecting part (112) connected to one end of each groove penetrating part (111), and the bending parts (12) are positioned at the other ends of the two groove penetrating parts (111) and form welding ends.

3. The flat wire motor stator of claim 2, wherein: the two slot penetrating parts (111) positioned at the innermost layer and the outermost layer of the iron core slot (3) are positioned at the same layer.

4. A flat wire motor stator as claimed in claim 3, wherein: the two through slot parts (111) of the coils positioned in the middle layer of the iron core slot (3) are respectively positioned in two adjacent layers, the coils positioned in the middle layer of the iron core slot (3) are divided into a plurality of groups of coil groups which are sequentially arranged at intervals along the circumferential direction of the stator iron core (2) and are arranged layer by layer along the depth direction of the iron core slot (3), the circumferential spacing of the adjacent coils in each coil group is the same in the stator iron core (2), and the circumferential inclination directions of the adjacent coil groups around the stator iron core (2) are the same.

5. The flat wire motor stator of claim 4, wherein: two bending parts (12) of the coil positioned at the middle layer and the innermost layer of the iron core groove (3) are respectively bent towards two sides of the width direction of the coil main body (11), and two bending parts (12) of the coil positioned at the outermost layer of the iron core groove (3) are bent towards one side of the width direction of the coil main body (11).

6. The flat wire motor stator of claim 4, wherein: the number of the iron core slots (3) is 72, and 6 layers are arranged in the iron core slots; the two parallel branches of each group of winding circuits are respectively set as a first branch A and a second branch B, wherein the first branch A comprises coils A1-A2, a3-A4, a5-A6, a7-A8, a9-A10 and a11-A12; the second branch B comprises coils B1-B2, B3-B4, B5-B6, B7-B8, B9-B10 and B11-B12;

two through slot parts (111) of the coils a1-A2 and B1-B2 are respectively positioned on the 2 nd layer and the 3 rd layer of the bottom of the inner slot of the iron core slot (3) along the slot opening direction;

the two through slot parts (111) of a3-A4 and B3-B4 are respectively positioned at the 4 th layer and the 5 th layer of the iron core slot (3);

the two through slot parts (111) of a5-A6 and B5-B6 are positioned on the 6 th layer of the iron core slot (3);

two through slot parts (111) of a7-A8 and B7-B8 are respectively positioned at the 5 th layer and the 4 th layer of the iron core slot (3);

two slot penetrating parts (111) of a9-A10 and B9-B10 are respectively positioned at the 3 rd layer and the 2 nd layer of the iron core slot (3);

the two through slot parts (111) of a11-A12 and B11-B12 are positioned on the 1 st layer of the iron core slot (3);

A1-A2 is connected with a3-A4 at a welding end, a3-A4 coil is connected with a5-A6 at a welding end, a5-A6 is connected with a7-A8 at a welding end, a7-A8 is connected with a9-A10 at a welding end, a9-A10 is connected with a11-A12 at a welding end, and so on;

B1-B2 is connected with B3-B4 at a welding end, B3-B4 coil is connected with B5-B6 at a welding end, B5-B6 is connected with B7-B8 at a welding end, B7-B8 is connected with B9-B10 at a welding end, B9-B10 is connected with B11-B12 at a welding end, and so on;

the coil connection sequence is from layer 1 to layer 6 in turn, and then from layer 6 to layer 1 in turn, and the cycle is repeated.

7. The flat wire motor stator according to any one of claims 1 to 6, wherein: the outgoing lines of the branches are all positioned on the 1 st layer or the 2 nd layer of the iron core groove (3).

8. The flat wire motor stator of claim 7, wherein: the center point of the branch is positioned on the 1 st layer of the iron core slot (3).

9. A flat wire motor, characterized by: comprising a flat wire motor stator as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: comprising the flat wire motor of claim 9.

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