CN217388333U

CN217388333U - Stator module with balanced winding and motor

Info

Publication number: CN217388333U
Application number: CN202220748381.1U
Authority: CN
Inventors: 卢芳友
Original assignee: Shanghai Yiweike Motor Technology Co ltd
Current assignee: Shanghai Yiweike Motor Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-06
Anticipated expiration: 2032-03-31

Abstract

The utility model relates to the field of electric machines, in particular to stator module and motor with balanced winding. Each stator slot is internally provided with 6 layers of rectangular conductors; the connection path of the stator winding at the hairpin end is as follows: the No. 1 conductor is connected with the No. 1 conductor in the other stator slot, and a span mode of a combined span is adopted; the No. 2 conductor is connected with the No. 3 conductor in the other stator slot, and only a span mode of a whole distance is adopted; the No. 4 conductor is connected with the No. 5 conductor in the other stator slot, and a span mode of a combined span is adopted; the No. 6 conductor is connected with the No. 6 conductor in the other stator slot, and only a full-span mode is adopted. The utility model discloses in, the component quantity of each branch road of every phase winding is the same, and the looks groove number and the number of piles homogeneous phase that each branch road passed through have realized basically that each branch road back electromotive force phase is the same, and the size is the same, and the resistance inductance of each branch road head and end is the same, has realized three-phase winding's balanced arrangement.

Description

Stator module with balanced winding and motor

Technical Field

The utility model belongs to the motor field, in particular to stator module and motor with balanced winding.

Background

The flat wire motor has the advantages of high power density, low electromagnetic noise and the like, but along with the increasing working rotating speed of the motor, the alternating current loss problem of the flat wire motor under the working of high-frequency current is more and more emphasized by the industry.

The three-phase flat wire motor winding generally comprises a plurality of parallel branches, and when the positions or phases of rectangular conductors of flat wires passing through the branch windings are different, obvious phase difference or nonuniform inductance can be generated among the branches, so that the problem of circulation current generated in the branches is solved. The problem of circular current of each branch of the winding is the most prominent problem of the current flat wire motor with the largest alternating current loss. In addition, the driving motor of the new energy automobile generally adopts an 8-pole design, and when the number of parallel branches of a motor winding is equal to 3, no good solution is available for ensuring the balanced arrangement of all branches of a three-phase winding in the industry.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a stator assembly with balanced windings, the stator assembly including a stator core and stator windings; a plurality of stator slots are arranged on the stator core along the circumferential direction of the stator core, 6 layers of rectangular conductors are arranged in each stator slot, and the rectangular conductors in each layer in the same stator slot are sequentially arranged along the radial direction of the stator core;

the stator winding is a three-phase winding; the number of poles of the stator winding is 8 or a multiple of 8; the number of branches of each phase of winding is 3 or a multiple of 3;

the connection path of the stator winding at the hairpin end is as follows: the No. 1 conductor is connected with the No. 1 conductor in the other stator slot, and a span mode of a combined span is adopted; the No. 2 conductor is connected with the No. 3 conductor in the other stator slot, and only a span mode of a whole distance is adopted; the No. 4 conductor is connected with the No. 5 conductor in the other stator slot, and a span mode of a combined span is adopted; the No. 6 conductor is connected with the No. 6 conductor in the other stator slot, and only a span mode of a whole distance is adopted;

the connection path of the stator winding at the welding end is as follows: the No. 1 conductor is connected with the No. 2 conductor in the other stator slot, the No. 3 conductor is welded with the No. 4 conductor in the other stator slot, and the No. 5 conductor is welded with the No. 6 conductor in the other stator slot, and all the conductors adopt a span mode of only a whole distance.

Further, the combined span refers to two or more spans of a whole span, a first short span, a second short span, a first long span and a second long span; the calculation formula of the whole distance, the first short distance, the second short distance, the first long distance and the second long distance is as follows:

C1＝Z/P；

C2＝C1-2；

C3＝C1-1；

C4＝C1+1；

C5＝C1+2；

wherein, C1 is integer pitch, C2 is first short pitch, C3 is second short pitch, C4 is first long pitch, C5 is second long pitch, Z is the number of stator slots on the stator core, and P is the number of poles of the stator winding.

Furthermore, each branch is formed by one or more groups of small units which are combined in series and/or in parallel;

a group of said cell combinations comprises one cell E, one cell F, one cell G and one cell H.

Furthermore, when the outgoing line is outgoing at the welding end, in the small unit E part, the stator winding adopts a span mode of combining the whole distance and the first long distance at the card sending end;

in the small unit F part, the stator winding adopts a span mode of combining the whole distance and the first long distance at the hairpin end;

in the small unit G part, the stator winding adopts a span mode of combining a whole distance and a first short distance at a hairpin end;

in the small unit H part, the stator winding adopts a span mode of combining a whole distance, a first short distance and a second short distance at the hairpin end.

in the small unit H part, the stator winding adopts a span mode of combining a whole distance, a first short distance, a second short distance and a first long distance at a hairpin end.

in the small unit H part, the stator winding adopts a span mode of combining a whole distance, a first long distance and a second long distance at the hairpin end.

Furthermore, when the outgoing line is outgoing at the hairpin end, the stator winding only adopts a span mode of a whole pitch at the hairpin end in the small unit E part;

in the small unit F part, the stator winding only adopts a span mode of a whole pitch at a hairpin end;

in the small unit G part, the stator winding only adopts a span mode of a whole distance at a hairpin end;

in the small unit H part, the stator winding adopts a span mode of combining a whole distance, a second short distance and a first long distance at the hairpin end.

in the small unit F part, the stator winding only adopts a span mode of a whole distance at a hairpin end;

The utility model also provides a motor with balanced winding, the motor includes above-mentioned stator module.

The utility model has the advantages that:

1. the utility model discloses in, the component quantity of each branch road of every phase winding is the same, and the phase trough number and the number of piles homogeneous phase that each branch road passed through have realized basically that each branch road back electromotive force phase is the same, and the size is the same, and the resistance inductance of each branch road head end is the same, has realized three-phase winding's balanced arrangement.

2. The utility model discloses in, stator module's lead-out wire need not obviously possess stator winding's tip length, has shortened motor winding tip length on the whole. The position of the outgoing lines of the motor is controlled within a small angle range, no jumper wire or cross line exists between the outgoing lines, the structural arrangement of the motor is facilitated, and the motor is made to have good manufacturability.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows a schematic structural view of a stator assembly in an embodiment of the present invention;

fig. 2 shows a schematic cross-sectional view of a stator slot in an embodiment of the invention;

fig. 3 shows a schematic layout of all conductors in one stator slot according to an embodiment of the present invention;

FIG. 4 is a schematic diagram showing a winding path of the small unit E when the lead-out wire is led out from the welding terminal in the embodiment of the present invention;

FIG. 5 is a schematic diagram showing a winding path of the small unit F when the lead-out wire is led out from the welding end in the embodiment of the present invention;

FIG. 6 is a schematic diagram showing the winding path of the small unit G when the lead-out wire is led out from the welding end in the embodiment of the present invention;

FIG. 7 is a schematic diagram showing a winding path of a small unit H1 when the lead-out wire is led out from the welding terminal in the embodiment of the present invention;

FIG. 8 is a schematic diagram showing a winding path of a small cell H2 when the lead-out wire is led out from the welding terminal in the embodiment of the present invention;

FIG. 9 is a schematic diagram showing a winding path of a small unit H3 when the lead wire is led out from the welding terminal in the embodiment of the present invention;

FIG. 10 is a schematic diagram showing a winding path of the small unit E when the outgoing line is outgoing from the card issuing end in the embodiment of the present invention;

FIG. 11 is a schematic diagram showing a winding path of a small unit F when the outgoing line is outgoing from the card issuing end in the embodiment of the present invention;

fig. 12 is a schematic diagram showing a winding path of the small unit G when the outgoing line is outgoing from the card issuing end in the embodiment of the present invention;

FIG. 13 is a schematic diagram showing a winding path of a small unit H1 when an outgoing line is outgoing from a card issuing end according to an embodiment of the present invention;

FIG. 14 is a schematic diagram showing a winding path of a small cell H2 when an outgoing line is outgoing from a card issuing end according to an embodiment of the present invention;

fig. 15 is a schematic diagram illustrating a winding path of the small cell H3 when the outgoing line is outgoing from the card issuing end according to the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

An embodiment of the utility model provides a motor with balanced winding, the motor includes stator module.

Specifically, as shown in fig. 1, the stator assembly includes a stator core and a stator winding; the stator core is provided with a plurality of stator slots, and the stator slots are sequentially arranged along the circumferential direction of the stator core and are in an annular array shape; the stator winding is embedded and wound in the stator slot, the winding of the stator winding adopts a rectangular conductor, and the winding is uniformly and symmetrically arranged in the stator slot.

And 6 layers of rectangular conductors are arranged in each stator slot, and the rectangular conductors in the same stator slot are sequentially arranged along the radial direction of the stator core. For convenience of understanding, as shown in fig. 2, the rectangular conductors in each layer in the same stator slot are sequentially marked as a conductor No. 1, a conductor No. 2, a conductor No. 3, a conductor No. 4, a conductor No. 5, and a conductor No. 6 in the direction from the outside of the stator core to the center of the stator core. For convenience in describing the particular winding path in the following, the conductors in the stator slots are numbered in the arrangement shown in fig. 3.

it should be noted that the stator winding can be divided into an in-slot winding and an end winding; the in-slot winding refers to a part of the rectangular conductor in the stator slot, and the end winding refers to a part of the rectangular conductor on two sides of the stator core. The end windings are used for connecting rectangular conductors at different positions in different stator slots in a matched mode according to a certain span, and therefore internal connection of the stator windings is achieved. The end windings are distributed on two sides of the stator core and are respectively called a hairpin end and a welding end.

Furthermore, the path of the stator winding on the stator core is determined by the connection mode of the winding on the radial direction of the stator core and the span mode on the circumferential direction of the stator core. Namely, different layer slot matching modes correspond to winding paths of different windings.

Specifically, the path of the stator winding on the stator core includes: the connection path of the stator winding at the hairpin end and the connection path of the stator winding at the weld end.

Specifically, the connection path of the stator winding at the hairpin end is as follows: the No. 1 conductor is connected with the No. 1 conductor in the other stator slot, and a span mode of a combined span is adopted; the No. 2 conductor is connected with the No. 3 conductor in the other stator slot, and only a span mode of a whole distance is adopted; the No. 4 conductor is connected with the No. 5 conductor in the other stator slot, and a span mode of a combined span is adopted; the No. 6 conductor is connected with the No. 6 conductor in the other stator slot only in a span mode of a whole distance.

Specifically, the combined span refers to two or more spans of a whole span, a first short span, a second short span, a first long span and a second long span; the calculation formula of the whole distance, the first short distance, the second short distance, the first long distance and the second long distance is as follows:

C1＝Z/P；

C2＝C1-2；

C3＝C1-1；

C4＝C1+1；

C5＝C1+2；

wherein, C1 is a whole pitch, C2 is a first short pitch, C3 is a second short pitch, C4 is a first long pitch, C5 is a second long pitch, Z is the number of stator slots on the stator core, and P is the number of poles of the stator winding.

The stator assembly provided by the embodiment of the utility model realizes the unification of the number of layers and the slot phase of the paths of the same-phase different branch windings by the lap winding connection method, and realizes the balanced arrangement of each branch winding; in addition, all the motor lead-out wires or central point connecting wires are positioned at adjacent slots, and no special jumper is arranged, so that the motor has relatively good manufacturing manufacturability.

For example, a 72-slot 3-phase 8-pole winding is taken as an example, that is, the number Z of stator slots in the stator core is 72, the number P of stator winding poles is 8, and the number m of stator winding phases is 3. Therefore, the number Q of slots per pole per phase is Z/(P × m) 3, the total distance C1 is Z/P9, the first short distance C2 is 7, the second short distance C3 is 8, the first long distance C4 is 10, and the second long distance C5 is 11.

For convenience of understanding, the stator slots and the rectangular conductors in the stator slots are named sequentially along the circumferential direction of the stator core. For example, as shown in fig. 4-15, the reference numerals in the drawings denote the numbers of the stator slots, i.e., stator slot No. 1, stator slot No. 2, stator slot No.. 21. For ease of understanding, the definition Z1(1) represents conductor No. 1 in stator slot No. 1 and Z2(3) represents conductor No. 3 in stator slot No. 2.

Specifically, the stator winding is a three-phase winding, each of which is W, V, U-phase winding, and each phase winding includes 3 or multiple branches of 3 according to the arrangement mode of the stator winding on the stator core, and each branch is formed by combining one or more groups of small units in series and/or in parallel.

Illustratively, when the lead wires are led out at the welding end, as shown in fig. 4, in the small unit E part, the stator winding adopts a span mode that the whole distance C1 is 9 and the first long distance C4 is 10. The specific winding path of the small unit E is as follows: z10(2) → Z1(3) → Z10(4) → Z1(5) → Z10(6) → Z19(6) → Z10(5) → Z19(4) → Z10(3) → Z19(2) → Z10(1) → Z20 (1).

As shown in fig. 5, in the small unit F part, the stator winding adopts a span mode of combining a whole pitch C1-9 and a first long pitch C4-10 at the hairpin end. The specific winding path of the small unit F is as follows: z11(2) → Z2(3) → Z11(4) → Z2(5) → Z11(6) → Z20(6) → Z11(5) → Z20(4) → Z11(3) → Z20(2) → Z11(1) → Z21 (1).

As shown in fig. 6, in the small unit G part, the stator winding adopts a span mode of a combination of a full pitch C1-9 and a first short pitch C2-7 at the hairpin end. The specific winding path of the small unit G is as follows: z12(2) → Z3(3) → Z12(4) → Z3(5) → Z12(6) → Z21(6) → Z12(5) → Z21(4) → Z12(3) → Z21(2) → Z12(1) → Z19 (1).

It should be noted that, in order to achieve that each branch can meet the requirement of equalization, the specific winding path of the small cell H is divided into three types according to specific situations, which are respectively denoted as small cell H1, small cell H2, and small cell H3.

As shown in fig. 7, in the small unit H1, the stator winding adopts a span mode in which the whole distance C1 is 9, the first short distance C2 is 7 and the second short distance C3 is 8 at the hairpin end. The specific winding path of the small cell H1 is as follows: z10(2) → Z1(3) → Z10(4) → Z2(5) → Z11(6) → Z20(6) → Z11(5) → Z21(4) → Z12(3) → Z21(2) → Z12(1) → Z19 (1).

As shown in fig. 8, in the small unit H2, the stator winding adopts a span mode in which the whole distance C1 is 9, the first short distance C2 is 7, the second short distance C3 is 8, and the first long distance C4 is 10 at the hairpin end. The specific winding path of the small cell H2 is as follows: z11(2) → Z2(3) → Z11(4) → Z3(5) → Z12(6) → Z21(6) → Z12(5) → Z19(4) → Z10(3) → Z19(2) → Z10(1) → Z20 (1).

As shown in fig. 9, in the small unit H3, the stator winding adopts a span mode of a combination of a full pitch C1-9, a first long pitch C4-10 and a second long pitch C5-11 at the hairpin end. The winding path of the small cell H3 is: z12(2) → Z3(3) → Z12(4) → Z1(5) → Z10(6) → Z19(6) → Z10(5) → Z20(4) → Z11(3) → Z20(2) → Z11(1) → Z21 (1).

For example, when the outgoing line is outgoing at the hairpin end, as shown in fig. 10, in the small unit E portion, the stator winding only adopts a span mode of a full pitch C1 being 9 at the hairpin end. The specific winding path of the small unit E is as follows: z1(1) → Z10(2) → Z1(3) → Z10(4) → Z1(5) → Z10(6) → Z19(6) → Z10(5) → Z19(4) → Z10(3) → Z19(2) → Z10 (1).

As shown in fig. 11, in the small unit F part, the stator winding only adopts a span mode of 9-integer pitch C1 at the hairpin end. The specific winding path of the small unit F is as follows: z2(1) → Z11(2) → Z2(3) → Z11(4) → Z2(5) → Z11(6) → Z20(6) → Z11(5) → Z20(4) → Z11(3) → Z20(2) → Z11 (1).

As shown in fig. 12, in the small unit G portion, the stator winding only adopts a span mode of a full pitch C1-9 at the hairpin end. The specific winding path of the small unit G is as follows: z3(1) → Z12(2) → Z3(3) → Z12(4) → Z3(5) → Z12(6) → Z21(6) → Z12(5) → Z21(4) → Z12(3) → Z21(2) → Z12 (1).

Similarly, in order to realize that each branch can meet the requirement of equalization, the specific winding path of the small cell H is divided into three types according to specific situations, and the three types are respectively marked as a small cell H1, a small cell H2 and a small cell H3.

As shown in fig. 13, in the small unit H1, the stator winding adopts a span mode of a combination of a full pitch C1-9, a second short pitch C3-8 and a first long pitch C4-10 at the hairpin end. The specific winding path of the small cell H1 is as follows: z1(1) → Z10(2) → Z1(3) → Z10(4) → Z2(5) → Z11(6) → Z20(6) → Z11(5) → Z21(4) → Z12(3) → Z21(2) → Z12 (1).

As shown in fig. 14, in the small unit H2, the stator winding adopts a span mode of a combination of a full pitch C1-9, a first short pitch C2-7 and a second short pitch C3-8 at the hairpin end. The specific winding path of the small cell H2 is as follows: z2(1) → Z11(2) → Z2(3) → Z11(4) → Z3(5) → Z12(6) → Z21(6) → Z12(5) → Z19(4) → Z10(3) → Z19(2) → Z10 (1).

As shown in fig. 15, in the small unit H3, the stator winding adopts a span mode of a combination of a whole distance C1-9, a first long distance C4-10 and a second long distance C5-11 at the hairpin end. The winding path of the small cell H3 is: z3(1) → Z12(2) → Z3(3) → Z12(4) → Z1(5) → Z10(6) → Z19(6) → Z10(5) → Z20(4) → Z11(3) → Z20(2) → Z11 (1).

When the outgoing line is outgoing at the card sending end, only the small unit H adopts a span mode of combined span, and the rest small units adopt a span mode of integral distance, so that the forming process is simpler.

The winding paths of the small units E, F, G, H1, H2 and H3 are only exemplarily shown as winding paths under a pair of poles, and the windings of the small units need to be simultaneously moved and matched in the circumferential direction for use in an actual complete stator winding; and winding paths in each small unit are all in a lap winding mode, so that the requirement on balanced arrangement of windings is met.

The embodiment of the utility model provides an in the wire winding route of stator module that proposes, each branch road constitutes by E, F, G and four kinds of little units of H.

Preferably, small element E is followed by small element F or small element H2; small cell B followed by small cell C or small cell H3; small cell C followed by small cell H1 or small cell E; small element H1 followed by small element E; small element H2 followed by small element F; small cell H3 is followed by small cell G. The winding path formed by connection in this way is simplest and is beneficial to the structural arrangement of the motor.

Illustratively, a schematic of the U-phase winding wiring for a 72 slot 3-phase 8-stage stator assembly. The lead-out wire is at the welding end, and the U-phase winding comprises 3 branches, and is divided into a U1 branch, a U2 branch and a U3 branch.

Wherein, the complete winding route of U1 branch road is: small cell E, small cell F, small cell G and small cell H1 are connected in series in sequence. The specific winding path is as follows: z10(2) → Z1(3) → Z10(4) → Z1(5) → Z1(6) → Z1(6) → Z1(5) → Z1(4) → Z1(3) → Z1(2) → Z1(1) → Z1(1) → Z1(1) → Z1(2) → Z1(3) → Z1(4) → Z1(5) → Z1(6) → Z1(6) → Z1(6) → Z1(5) → Z1(4) → Z1(3) → Z1(2) → Z1(1) → Z1 (72) → Z1(3) → Z1(1) → Z1 (72) → Z1) → Z (1) → Z1 (72) → Z (3) → Z1) → Z (1) → Z1) → 1(1) → Z (3) → Z5) → Z1(1) → Z1(3) → Z (1) → Z1(3) → Z5) → Z1(3) → Z1(3) → Z5) → Z (3) → Z72) → Z1) → Z (3) → Z1(3) → Z5) → Z72 (3) → Z5) → Z (1) → Z1(3) → Z1(1) → Z5) → Z1) → Z (1) → Z1(3) → Z5) → Z1(3) → Z1(1) → Z1(3) → Z5) → Z1(3) → Z1(1) → Z5) → Z1(3) → Z5) → Z (3) → Z72 (3) → Z5) → Z72 (3) → Z1(3) → Z5) → Z1(3) → Z5) → Z (1 (3) → Z5) → Z (1 (3) → Z5 (3) → Z5) → Z (3) → Z5.

The complete winding path of the U2 branch is as follows: small cell F, small cell G, small cell E and small cell H2 are connected in series in sequence. The specific winding path is as follows: z11(2) → Z2(3) → Z11(4) → Z2(5) → Z2(6) → Z2(6) → Z2(5) → Z2(4) → Z2(3) → Z2(2) → Z2(1) → Z2(1) → Z2(1) → Z2(2) → Z2(3) → Z2(4) → Z2(5) → Z2(6) → Z2(6) → Z2(6) → Z2(5) → Z2(4) → Z2(3) → Z2(2) → Z2(1) → Z2 (72) → Z2(3) → Z2(1) → Z2 (72) → Z2) → Z (1) → Z2 (72) → Z (3) → Z2) → Z (1) → Z2) → 2(2) → Z (3) → Z5) → Z2(1) → Z2(3) → Z (2) → Z2(3) → Z5) → Z2(3) → Z2(3) → Z5) → Z (3) → Z72) → Z2) → Z (3) → Z2(3) → Z5) → Z72 (3) → Z5) → Z (1) → Z2(3) → Z2(1) → Z5) → Z2) → Z (2) → Z2(3) → Z5) → Z2(3) → Z2(1) → Z2(3) → Z5) → Z2(3) → Z2(1) → Z5) → Z2(3) → Z5) → Z (3) → Z72 (3) → Z5) → Z72 (3) → Z2(3) → Z5) → Z2(3) → Z5) → Z (2 (3) → Z5) → Z (2 (3) → Z5 (3) → Z5) → Z (3) → Z5.

The complete winding path of the U3 branch is as follows: small cell G, small cell E, small cell F and small cell H3 are connected in series in sequence. The specific winding path is as follows: z12(2) → Z3(3) → Z12(4) → Z3(5) → Z3(6) → Z3(6) → Z3(5) → Z3(4) → Z3(3) → Z3(2) → Z3(1) → Z3(1) → Z3(1) → Z3(2) → Z3(3) → Z3(4) → Z3 (72) → Z3(5) → Z3 (72) (6) → Z3(6) → Z3(6) → Z3(5) → Z3 (72) → Z72) (72) → Z72 (72) → Z (72) → Z (72) → Z72 (1) → Z3 (72) → Z72 (72) → Z (72) → Z72 (72) → Z (72) → Z72 (72) → Z (72) → Z72) (6) → Z72) (6) → Z72 (72) (6) → Z72 (72) (6) (72) → Z72) (6) → Z72) (1) → Z72 (72) (72) 6) → Z (72) (72) 6) → Z (72) (72) 6) → Z (72) 6) → Z (72) 6) → Z72 (72) 6) → Z (72) 6) → Z (72) (6) → Z (72) (72) Z72) 6) → Z (72) 6) Z (72 (Z (72) 6) → Z (72) 6) → Z) Z (72) Z72) 6) → Z (72) Z (72) Z (72) Z (72) 6) → Z (72) Z (72) 6) → Z72) 6) Z (72) Z (72) Z (72) Z (72) Z (72) Z (72) 6.

Illustratively, the wiring diagram is a wiring diagram of a U-phase winding of a 72-slot 3-phase 8-stage stator assembly, an outgoing line of the wiring diagram is at a hairpin end, and the U-phase winding consists of 3 branches which are divided into a branch U1, a branch U2 and a branch U3.

Wherein, the complete winding route of U1 branch road is: small cell E, small cell F, small cell G and small cell H1 are connected in series in sequence. The specific winding path is as follows: z1(1) → Z10(2) → Z1(3) → Z10(4) → Z10(5) → Z10(6) → Z10(6) → Z10(5) → Z10(4) → Z10(3) → Z10(2) → Z10(1) → Z10(1) → Z10(2) → Z10(3) → Z10(4) → Z10(5) → Z10(6) → Z10(6) → Z10(5) → Z10(4) → Z10(3) → Z10 (Z) 10) → Z10(1) → Z10(1) → Z10(2) → Z10(3) → Z10(2) → Z10 (72) → Z10(3) → Z5) → Z10(3) → Z10(5) → Z10(5) → Z10(3) → Z5) → Z10(5) → Z5 (3) → Z10(3) → Z72 (3) → Z10(3) → Z5) → Z10(3) → Z72 (3) → Z5) → Z10(3) → Z72 (3) → Z10(3) → Z5) → Z72 (3) → Z5) → Z72 (3) → Z10(3) → Z5) → Z10(3) → Z72 (3) → Z10(3) → Z5) → Z72 (3) → Z72 (10 (3) → Z72 (10 (3) → Z5) → Z72 (3) → Z72 (10 (3) → Z5) → Z72 (3) → Z5) → Z72 (3) → Z5).

The complete winding path of the U2 branch is as follows: small cell F, small cell G, small cell E and small cell H2 are connected in series in sequence. The specific winding path is as follows: z2(1) → Z11(2) → Z2(3) → Z11(4) → Z11(5) → Z11(6) → Z11(6) → Z11(5) → Z11(4) → Z11(3) → Z11(2) → Z11(1) → Z11(1) → Z11(2) → Z11(3) → Z11(4) → Z11(5) → Z11(6) → Z11(6) → Z11(5) → Z11(4) → Z11(3) → Z11 (Z) 11) → Z11(1) → Z11(1) → Z11(2) → Z11(3) → Z11(2) → Z11 (72) → Z11(3) → Z5) → Z11(3) → Z11(5) → Z11(5) → Z11(3) → Z5) → Z11(5) → Z5 (3) → Z11(3) → Z72 (3) → Z11(3) → Z5) → Z11(3) → Z72 (3) → Z5) → Z11(3) → Z72 (3) → Z11(3) → Z5) → Z72 (3) → Z5) → Z72 (3) → Z11(3) → Z5) → Z11(3) → Z72 (3) → Z11(3) → Z5) → Z72 (3) → Z72 (11 (3) → Z72 (11 (3) → Z5) → Z72 (3) → Z72 (11 (3) → Z5) → Z72 (3) → Z5) → Z72 (3) → Z5).

The complete winding path of the U3 branch is as follows: the small cell G, the small cell E, the small cell F and the small cell H3 are sequentially connected in series. The specific winding path is as follows: z3(1) → Z12(2) → Z3(3) → Z12(4) → Z12(5) → Z12(6) → Z12(6) → Z12(5) → Z12(4) → Z12(3) → Z12(2) → Z12(1) → Z12(1) → Z12(2) → Z12(3) → Z12(4) → Z12(5) → Z12(6) → Z12(6) → Z12(5) → Z12(4) → Z12(3) → Z12 (Z) 12) → Z12(1) → Z12(1) → Z12(2) → Z12(3) → Z12(2) → Z12 (72) → Z12(3) → Z5) → Z12(3) → Z12(5) → Z12(5) → Z12(3) → Z5) → Z12(5) → Z5 (3) → Z12(3) → Z72 (3) → Z12(3) → Z5) → Z12(3) → Z72 (3) → Z5) → Z12(3) → Z72 (3) → Z12(3) → Z5) → Z72 (3) → Z5) → Z72 (3) → Z12(3) → Z5) → Z12(3) → Z72 (3) → Z12(3) → Z5) → Z72 (3) → Z72 (12 (3) → Z72 (12 (3) → Z5) → Z72 (3) → Z72 (12 (3) → Z5) → Z72 (3) → Z5) → Z72 (3) → Z5).

It should be noted that when the outgoing line is located at the card issuing end, all the outgoing lines of the stator assembly are located at the number 1 conductor; when the lead-out wires are positioned at the welding end, the lead-out wires of the stator assembly are all positioned at the No. 1 conductor and the No. 2 conductor. By the design, the outgoing line of the stator assembly does not need to obviously occupy the length of the end part of the motor winding, and the length of the end part of the motor winding is shortened on the whole. The position of the outgoing lines of the motor is controlled within a small angle range, no jumper wire or cross line exists between the outgoing lines, the structural arrangement of the motor is facilitated, and the motor manufacturing has relatively good manufacturability.

The embodiment of the utility model provides an among the stator module, the component quantity of each branch road of every phase winding is the same, and the phase groove number and the number of piles homogeneous phase of each branch road process have realized basically that each branch road back electromotive force phase is the same, and the size is the same, and the first terminal resistance inductance of each branch road is the same, has realized three-phase winding's balanced arrangement.

It should be noted that when the number of poles of the stator assembly is a multiple of 8, each branch is still composed of E, F, G and H four small units. For example, when the number of poles of the stator assembly is 16, each branch is formed by combining two groups of small units in series and/or in parallel; when the pole number of the stator component is 24, each branch circuit is formed by combining three groups of small units in series and/or parallel connection; and will not be described in detail herein.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A stator assembly having balanced windings, the stator assembly comprising a stator core and stator windings; a plurality of stator slots are arranged on the stator core along the circumferential direction of the stator core, 6 layers of rectangular conductors are arranged in each stator slot, and the rectangular conductors in each layer in the same stator slot are sequentially arranged along the radial direction of the stator core;

the stator winding is a three-phase winding; the number of poles of the stator winding is 8 or multiples of 8; the number of branches of each phase of winding is 3 or a multiple of 3;

2. The stator assembly with balanced windings of claim 1 wherein the combined span is two or more of a full span, a first short span, a second short span, a first long span and a second long span; the calculation formulas of the whole distance, the first short distance, the second short distance, the first long distance and the second long distance are as follows:

C1＝Z/P；

C2＝C1-2；

C3＝C1-1；

C4＝C1+1；

C5＝C1+2；

3. A stator assembly with balanced windings according to claim 2, characterized in that each of said branches is formed by one or more groups of small cell combinations connected in series and/or in parallel;

4. The stator assembly with balanced windings of claim 3, wherein when the outgoing lines are outgoing at the welding end, the stator windings adopt a span mode of a whole distance and a first long distance combination at the hairpin end in the small unit E part;

5. The stator assembly with balanced windings of claim 3, wherein when the outgoing lines are outgoing at the welding end, the stator windings adopt a span mode of a whole distance and a first long distance combination at the hairpin end in the small unit E part;

6. The stator assembly with balanced windings of claim 3, wherein when the outgoing lines are outgoing at the welding end, the stator windings adopt a span mode of a whole distance and a first long distance combination at the hairpin end in the small unit E part;

7. The stator assembly with the balanced windings according to claim 3, wherein when the outgoing line is outgoing at the hairpin end, in the small unit E part, the stator winding only adopts a span mode of a whole pitch at the hairpin end;

8. The stator assembly with the balanced windings according to claim 3, wherein when the outgoing line is outgoing at the hairpin end, in the small unit E part, the stator winding only adopts a span mode of a whole pitch at the hairpin end;

9. The stator assembly with the balanced windings according to claim 3, wherein when the outgoing line is outgoing at the hairpin end, in the small unit E part, the stator winding only adopts a span mode of a whole pitch at the hairpin end;

10. An electrical machine having balanced windings, characterized in that the electrical machine comprises a stator assembly according to any of claims 1-9.