CN116317266B

CN116317266B - Stator of flat wire motor

Info

Publication number: CN116317266B
Application number: CN202310578158.6A
Authority: CN
Inventors: 郑广会; 张铃; 郑金泽; 郑金宇
Original assignee: Tianweilan Electric Drive Technology Jiangsu Co ltd
Current assignee: Tianweilan Electric Drive Technology Jiangsu Co ltd
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-09-22
Anticipated expiration: 2043-05-22
Also published as: CN116865474A; CN116780802A; CN116317266A

Abstract

The invention provides a stator of a flat wire motor, which comprises a stator iron core and a flat wire winding, wherein the number of winding grooves of each phase of each pole is 3, the number of poles 2P of the stator is an even number multiple of 3, the number of layers L formed by the flat wire winding in the winding grooves is an even number, the flat wire winding comprises a three-phase winding, each phase of the flat wire winding comprises 2 branches, each branch comprises a plurality of U-shaped sub-conductors connected in series, each phase of the flat wire winding fills up three continuous winding grooves in each pole, two leg parts of adjacent U-shaped sub-conductors welded together form a welding pair in each phase, and the spans between the two leg parts of each welding pair are equal, or the spans between the two leg parts of all welding pairs are only in two different conditions. The stator has the advantages of compact structure, low manufacturing cost and good working performance.

Description

Stator of flat wire motor

Technical Field

The invention relates to the field of motors, in particular to a stator of a flat wire motor using a flat wire as a winding.

Background

Taking a motor of a new energy automobile as an example, a motor stator using flat wires as windings has higher copper filling rate, and the power density of the motor can be improved.

However, the flexibility of the arrangement mode of the flat wire winding relative to the round wire winding is poor, and how to arrange the flat wire winding according to the requirements of each performance of the motor, so that the winding structure is simple, the manufacturing cost is low, and the motor has better working performance (such as larger torque or smaller harmonic influence), which is a problem to be solved in the field.

Especially, for a flat wire winding with 3 slots q and 3 even times of 2P, the winding mode in the prior art is complex. For example, the outlet terminals of the branches are spaced widely (even up to 180 °) in the circumferential direction of the stator, complicating the arrangement of the bus bars; or the space taken up by one of the ends of the winding is large, so that the installation of the rotor has a certain limitation.

The applicant has proposed three winding modes of the stator of the flat wire motor in three patent applications with application numbers CN202310084214.0, CN202310118219.0 and CN202310128292.6, respectively, which can solve the problems in the prior art. However, this winding method requires multiple turns at the welded ends of the sub-conductors, or the use of a busbar, which makes the winding at the welded ends occupy a larger radial dimension.

Disclosure of Invention

The present invention aims to overcome or at least alleviate the above-mentioned drawbacks of the prior art and to provide a stator for a flat wire electric machine.

The invention provides a stator of a flat wire motor, which comprises a stator core and a flat wire winding, wherein,

the number of the winding grooves of each pole of the stator is 3, the number of the poles of the stator is 2P which is an even number of the 3, the number of layers formed by the flat wire winding in the winding grooves is 2L, L is an integer not less than 2,

The flat wire winding comprises a three-phase winding, the flat wire winding of each phase comprising 2 branches, each branch comprising a plurality of U-shaped subconductors connected in series with each other,

the two legs of the U-shaped sub-conductor are connected at one end to form a crown end and are separated at the other end to form a welding end,

the flat wire winding of each phase fills up three consecutive winding slots per pole,

in each phase, the two legs of adjacent U-shaped sub-conductors that are welded together form a pair of welds, the span between the two legs of each pair being equal, or the spans between the two legs of all pairs being only two different.

In at least one embodiment, the flat wire windings occupy three wire slots per phase per pole, are fully aligned circumferentially, with equal spans between the two legs of each welded pair.

In at least one embodiment, in each branch, the U-shaped sub-conductors comprise Q-1 first conductors, Q second conductors, Q-1 third conductors, and 1 fourth conductors, Q = 2P x number of layers 2L/4, Q-1 first conductors being directly in series with each other, second conductors and third conductors being in spaced series with each other, the fourth conductors connecting the first conductors and second conductors together in series to form a queue having a connection order of:

A first conductor, a first conductor …, a first conductor, a fourth conductor, a second conductor, a third conductor …, a second conductor, a third conductor,

the span between the two legs of the welded pair is K, and

the first conductor has a span of K, the second conductor has a span of K-1, the third conductor has a span of K+1, the fourth conductor has a span of K+1 or K-1, or

The first conductor has a span of K, the second conductor has a span of K+1, the third conductor has a span of K-1, the fourth conductor has a span of K+2 or K-2, or

The first conductor has a span of K, the second conductor has a span of K+1, the third conductor has a span of K-1, the fourth conductor has a span of K+1 or K-1, or

The span of the first conductor is K, the span of the second conductor is K-1, the span of the third conductor is K+1, the span of the fourth conductor is K+2 or K-2,

K=9。

in at least one embodiment, the flat wire winding occupies three consecutive wire slots in the odd layers and three consecutive wire slots in the even layers of each phase of each pole; the slots of the odd layers of the same phase and the same pole are aligned in the circumferential direction of the stator core, the slots of the even layers of the same phase and the same pole are aligned in the circumferential direction, the even layers of the adjacent layers of each pole and the winding slots occupied by the odd layers of the flat wire winding are staggered by one slot in the circumferential direction,

The span between the two legs of each weld pair is equal.

In at least one embodiment, in each branch, the U-shaped sub-conductors comprise Q-1 first conductors, Q second conductors, Q-1 third conductors, and 1 fourth conductor, Q = 2P x the number of layers L/4, Q-1 first conductors being directly in series with each other, second conductors and third conductors being in spaced series with each other, the fourth conductors connecting the first conductors and second conductors together in series to form a queue having a connection order of:

the span between the two legs of the welded pair is K+1, and

the first conductor has a span of K-1, the second conductor has a span of K-2, the third conductor has a span of K, the fourth conductor has a span of K+1 or K-1, or

The first conductor has a span of K-1, the second conductor has a span of K, the third conductor has a span of K-2, the fourth conductor has a span of K+2 or K-2, or

The first conductor has a span of K-1, the second conductor has a span of K, the third conductor has a span of K-2, the fourth conductor has a span of K+1 or K-1, or

The first conductor has a span of K-1, the second conductor has a span of K-2, the third conductor has a span of K, the fourth conductor has a span of K+2 or K-2,

K=9。

in at least one embodiment, the U-shaped sub-conductors in each leg include Q-1 first conductors, Q second conductors, Q-1 third conductors, and 1 fourth conductors, Q = 2P x the number of layers L/4, Q-1 first conductors being directly in series with each other, second conductors and third conductors being in spaced series with each other, the fourth conductors connecting the first conductors and second conductors together in series to form a queue having a connection order of:

the span between the two legs of the welded pair is K-1, and

the first conductor has a span of K+1, the second conductor has a span of K, the third conductor has a span of K+2, the fourth conductor has a span of K+1 or K-1, or

The first conductor has a span of K+1, the second conductor has a span of K+2, the third conductor has a span of K, the fourth conductor has a span of K+2 or K-2, or

The first conductor has a span of K+1, the second conductor has a span of K+2, the third conductor has a span of K, the fourth conductor has a span of K+1 or K-1, or

The first conductor has a span of K+1, the second conductor has a span of K, the third conductor has a span of K+2, the fourth conductor has a span of K+2 or K-2,

K=9。

in at least one embodiment, the slots occupied by the flat wire windings occupy three consecutive inner wire slots per pole per phase in the radially inner L layers, three consecutive outer wire slots per pole per phase in the radially outer L layers, three inner wire slots and three outer wire slots per pole per phase are circumferentially staggered by one slot,

the welding pairs include a first welding pair and a second welding pair,

the two legs of the first welding pair are respectively positioned at the L layer and the L+1 layer, the span between the two legs of the first welding pair is the first welding span,

the two legs of the second weld pair are located in other adjacent layers than the L-th layer and the L+1-th layer, and the span between the two legs of the second weld pair is the second weld span.

In at least one embodiment, L is an odd number not less than 2, and in each leg there are 3× (P-1) U-shaped subconductors with two legs at the L-th and L+1-th layers, respectively, and P is the pole pair number.

In at least one embodiment, the U-shaped sub-conductors include Q-P first conductors, Q-P second conductors, Q-P third conductors, 1 fourth conductor, P-1 fifth conductors, P sixth conductors, and P-2 seventh conductors in each leg, Q = 2P x the number of layers 2L/4,

The two legs of the first conductor, the second conductor, the third conductor, the fifth conductor, the sixth conductor and the seventh conductor are inserted into two adjacent layers in the winding groove, the two legs of the fourth conductor are inserted into the same layer in the winding groove,

each branch comprises a first queue and a second queue, the fourth conductor is connected with the first queue and the second queue in series to form a branch queue,

the first queue comprises a first conductor and a fifth conductor connected in series with each other,

in the case where the two leg portions of the U-shaped sub-conductor need to be provided in the L-th layer and the l+1-th layer, respectively, a fifth conductor is used; in case the two legs of the U-shaped sub-conductor need to be arranged in other adjacent layers than the L-th layer and the L + 1-th layer, respectively, a first conductor is used,

the second queue includes a second conductor and a third conductor in series spaced apart from each other, and a sixth conductor and a seventh conductor in series spaced apart from each other,

in the case where two leg portions of the U-shaped sub-conductor need to be provided in the L-th layer and the l+1-th layer, respectively, a sixth conductor and a seventh conductor are used; the second conductor and the third conductor are used in case the two legs of the U-shaped sub-conductor need to be arranged in other adjacent layers than the L-th layer and the L + 1-th layer, respectively.

In at least one embodiment, L is an even number not less than 2, and in each leg there are 2 legs of the U-shaped subconductors located in the L-th and l+1-th layers, respectively.

In at least one embodiment, the U-shaped sub-conductors include Q-2 first conductors, Q second conductors, Q-2 third conductors, 1 fourth conductor, 1 fifth conductor, and 1 seventh conductor, Q = 2P number of poles 2L/4 number of layers,

the two legs of the first conductor, the second conductor, the third conductor, the fifth conductor and the seventh conductor are respectively inserted into two adjacent layers in the winding groove, the two legs of the fourth conductor are inserted into the same layer in the winding groove,

the second queue includes a seventh conductor and second and third conductors spaced apart from each other in series,

In the case where the two leg portions of the U-shaped sub-conductor need to be provided in the L-th layer and the l+1-th layer, respectively, a seventh conductor is used; the second conductor and the third conductor are used in case the two legs of the U-shaped sub-conductor need to be arranged in other adjacent layers than the L-th layer and the L + 1-th layer, respectively.

In at least one embodiment, the first weld span is k+1, the second weld span is K, k=9,

the span of the first conductor is K, the span of the fifth conductor is K-1,

the fourth conductor has a span k+1 in one branch and K-1 in the other branch; alternatively, the fourth conductor may have a span k+2 in one branch and K-2 in the other branch.

In at least one embodiment, the second conductor has a span of K-1, the third conductor has a span of K+1, the seventh conductor has a span of K, and in the case of a sixth conductor used in the queue, the sixth conductor has a span of K-2; or alternatively, the process may be performed,

the second conductor has a span of K+1, the third conductor has a span of K-1, the seventh conductor has a span of K-2, and in the case of a sixth conductor used in the queue, the sixth conductor has a span of K.

In at least one embodiment, the first weld span is K-1, the second weld span is K, k=9, and

The span of the first conductor is K, the span of the fifth conductor is K+1,

In at least one embodiment, the second conductor has a span of K-1, the third conductor has a span of K+1, the seventh conductor has a span of K+2, and in the case of a sixth conductor used in the queue, the sixth conductor has a span of K; or alternatively, the process may be performed,

the span of the second conductor is k+1, the span of the third conductor is K-1, the span of the seventh conductor is K, and in the case of using the sixth conductor in the queue, the span of the sixth conductor is k+2.

In at least one embodiment, the flat wire windings are led out at the crown end of the stator,

each branch of each phase also comprises 2I-shaped sub-conductors, the 2I-shaped sub-conductors are respectively connected at the head and tail of the queue or the branch queue as an outgoing line end and a lead end,

the span between adjacent legs of an I-shaped sub-conductor and an adjacent U-shaped sub-conductor is K.

In at least one embodiment, in each leg of each phase, 2I-shaped sub-conductors are replaced by one U-shaped sub-conductor and the fourth conductor is replaced by 2I-shaped sub-conductors.

In at least one embodiment, the flat wire windings are routed out at the weld ends of the stator,

each branch of each phase further comprises 1 additional conductor connected in series with a first conductor at the head of the queue and a third conductor at the tail of the queue, the additional conductor having a span K +2 or K-2 in the case of a fourth conductor having a span K +1 or K-1,

in the case where the span of the fourth conductor is K+2 or K-2, the span of the additional conductor is K+1 or K-1.

In at least one embodiment, the lead ends of the two legs are connected in parallel, or the lead end of one of the two legs is connected in series with the lead end of the other such that the two legs form one series winding.

The stator has the advantages of compact structure, low manufacturing cost and good working performance.

Drawings

Fig. 1 is a schematic view of a stator according to a first embodiment of the present invention.

Fig. 2 is a schematic diagram of one possible two-leg three-phase winding using a star connection.

Fig. 3 is a schematic diagram of one possible two-leg three-phase winding using delta connection.

Fig. 4 is a schematic view of a flat wire winding according to a first embodiment of the present invention.

Fig. 5 is a layered schematic view of one winding slot of a stator core according to a first embodiment of the present invention.

Fig. 6 is a schematic view of one of the phases of a winding according to a first embodiment of the invention.

Fig. 7 is a schematic diagram of several possible U-shaped sub-conductors according to the present invention.

Fig. 8 is a schematic structural view of one possible I-shaped sub-conductor according to the present invention.

Fig. 9 is a schematic diagram of the routing direction of one phase winding according to the first embodiment of the present invention, as seen from the crown end.

Fig. 10 is a schematic view of the routing direction of the windings corresponding to fig. 8, as seen from the welding end.

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

Fig. 12 is a schematic diagram of the routing direction of one phase winding according to the second embodiment of the present invention, as seen from the crown end.

Fig. 13 is a schematic view of the routing direction of the windings corresponding to fig. 12, as seen from the welding end.

Fig. 14 is a schematic view of the routing direction of one phase winding according to the third embodiment of the present invention, as seen from the welding end.

Fig. 15 is a schematic view of the routing direction of one phase winding according to the fourth embodiment of the present invention, as seen from the welding end.

Fig. 16 is a schematic view of the routing direction of one phase winding according to the fifth embodiment of the present invention, as seen from the welding end.

Fig. 17 is a schematic diagram of the routing direction of one phase winding according to the sixth embodiment of the present invention, as seen from the crown end.

Fig. 18 is a schematic diagram of the routing direction of one phase winding according to the seventh embodiment of the present invention, as seen from the crown end.

Fig. 19 is a schematic view of the routing direction of the windings corresponding to fig. 18, as seen from the welding end.

Fig. 20 to 26 are schematic diagrams of the routing direction of one phase winding according to eighth to fourteenth embodiments of the present invention, as viewed from the welding end.

Fig. 27 is a schematic diagram of the routing direction of one phase winding according to the fifteenth embodiment of the present invention, as seen from the crown end.

Fig. 28 is a schematic view of the routing direction of the windings corresponding to fig. 27 as viewed from the welding end.

Fig. 29 is a schematic diagram of the routing direction of one phase winding according to the sixteenth embodiment of the present invention, as seen from the crown end.

Fig. 30 is a schematic diagram of the routing direction of one phase winding according to the first embodiment of the present invention, as seen from the crown end.

Fig. 31 is a schematic view of the routing direction of the windings corresponding to fig. 30 as seen from the welding end.

Fig. 32 to 38 are schematic diagrams of the routing direction of one phase winding according to the second to eighth embodiments of the present invention, as viewed from the welding end.

Fig. 39 is a schematic diagram of the routing direction of one phase winding according to the ninth embodiment of the present invention, as seen from the crown end.

Fig. 40 is a schematic view of the routing direction of the windings corresponding to fig. 39 as seen from the welding end.

Fig. 41 is a schematic diagram of the routing direction of one phase winding according to the tenth embodiment of the present invention, as seen from the crown end.

Fig. 42 is a schematic diagram of the routing direction of one phase winding according to the eleventh embodiment of the present invention, as seen from the crown end.

Fig. 43 is a schematic view of the routing direction of the windings corresponding to fig. 42 as seen from the welding end.

Fig. 44 to 50 are schematic diagrams of the routing direction of one phase winding according to twelfth to eighteenth embodiments of the present invention, as viewed from the welding end.

Fig. 51 is a schematic diagram of the routing direction of one phase winding according to the nineteenth embodiment of the present invention, as seen from the crown end.

Fig. 52 is a schematic view of the routing direction of the windings corresponding to fig. 51 as seen from the welding end.

Fig. 53 is a schematic view of the routing direction of one phase winding according to a modification of the twenty-ninth embodiment of the present invention, as viewed from the welding end.

Fig. 54 is a schematic diagram of the routing direction of one phase winding according to a modification of the thirty-first embodiment of the present invention, as viewed from the welding end.

Fig. 55 is a schematic diagram of the routing direction of one phase winding according to a modification of the thirty-third embodiment of the present application, as viewed from the welding end.

Fig. 56 is a schematic view of the routing direction of one phase winding according to a modification of the thirty-fourth embodiment of the present application, as viewed from the welding end.

Reference numerals illustrate:

10. a stator core; 20 flat wire windings; 30. outgoing copper bars; a1 Crown end; a2 And welding the ends.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific illustrations are for the purpose of illustrating how one skilled in the art may practice the application, and are not intended to be exhaustive of all of the possible ways of practicing the application, nor to limit the scope of the application.

Unless otherwise specified, referring to fig. 1, a denotes an axial direction of a stator, R denotes a radial direction of the stator, and C denotes a circumferential direction of the stator.

The stator according to the present application includes a stator core 10, a flat wire winding 20 (hereinafter also simply referred to as winding 20), and an outgoing copper bar 30.

The stator core 10 has winding grooves (hereinafter also referred to simply as grooves) extending in the axial direction a formed in the inner periphery thereof, and each pole has a slot number q of 3 per phase, and the number of poles 2P of the stator is an even multiple of 3 (the number of pole pairs P is an integer multiple of 3).

As shown in fig. 2 and 3, each phase winding comprises 2 parallel branches. The three-phase windings may be connected in a star shape as shown in fig. 2, or may be connected in a delta shape as shown in fig. 3.

The windings in the winding slots form an even distribution of layers in the radial direction R. The legs of the winding as shown in fig. 4 are formed in 6 layers. It should be understood that in other possible embodiments the windings may also be, for example, 4 layers, 8 layers, etc.

Referring to fig. 5, the different layers in the wire winding groove are denoted by lower case english letters a, b, c, d, e, f, which denote the 1 st, 2 nd, 3 rd, 4 th, 5 th, 6 th layers, respectively, counted from the radial outside to the radial inside. It should be understood that in other possible embodiments, the routing directions of the sub-conductors may be reversed, and correspondingly in these embodiments, a, b, c, d, e, f may also represent layers 1, 2, 3, 4, 5, 6, respectively, from radially inside to radially outside.

It will be appreciated that the layer within the wire-wound slot is a virtual concept, such layer being formed by the lamination of the legs of the plurality of sub-conductors, the slot being free of a layered structure when no sub-conductors are disposed within the slot.

(first embodiment)

Next, referring to fig. 6 to 10, a winding method of a stator according to a first embodiment of the present application will be described. In this embodiment, the number of poles 2p=6, and thus the total number of winding grooves is 54. It should be appreciated that in other possible embodiments, the number of wire-wound slots may vary with the number of poles 2P.

In this embodiment, 6 stacked conductors are formed in each wire winding groove.

Fig. 6 shows a winding 20 of one phase (comprising two branches), in which there are 52U-shaped subconductors 21 and 4I-shaped subconductors in total. Thus in this embodiment each phase comprises 26U-shaped sub-conductors 21 and 2I-shaped sub-conductors 22 per leg.

Fig. 7 shows several different sizes and configurations of the U-shaped sub-conductors 21. Each U-shaped sub-conductor 21 has a generally U-shaped structure comprising two legs G for insertion into the wire-winding slots. The two legs G are connected at one end in the axial direction a to form a crown end A1 and are separated at the other end to form a weld end A2.

The distance between the two legs G of each U-shaped sub-conductor 21 is defined by the number of slots spaced apart, which distance is also referred to as a span hereinafter. For example, if one leg G of a certain U-shaped sub-conductor 21 is located in the slot 1 and the other leg G is located in the slot 10, the span of the U-shaped sub-conductor 21 is referred to as 10-1=9.

The twist fold formed by crown end A1 varies due to the different spans or layer numbers where the two legs G of U-shaped sub-conductor 21 are located. In addition, since the soldering terminal A2 is used to solder the adjacent U-shaped sub-conductors 21 together to form an electrical connection, the twisting and folding direction and distance of the soldering terminal A2 are different due to the different winding slots in which the adjacent legs G of the adjacent U-shaped sub-conductors 21 are located.

Referring to fig. 8,I, the sub-conductor 22 has only one leg G, and both ends of the leg G in the axial direction a are twisted in different directions in the circumferential direction C, respectively, to form a soldered end A2 and a wire-drawn end A3. In a state where the I-shaped sub-conductor 22 is mounted to the stator core 10, the wire lead-out terminal A3 is located at the end of the crown end A1 in the axial direction a. The soldering terminal A2 of the I-shaped sub-conductor 22 can be electrically connected to the soldering terminal A2 of the leg G of the adjacent U-shaped sub-conductor 21 by soldering, and the wire lead-out terminal A3 serves as a lead or wire outlet terminal of each branch. The lead-out end in this embodiment may be said to be located at the crown end.

Next, referring to fig. 9 and 10, the arrangement of the sub-conductors will be described in detail by taking one of the phases, for example, the U-phase, as an example.

In fig. 9, the U-shaped sub-conductor 21 is represented by a line segment with double arrows. The longitudinal and transverse reference numerals of the positions where the arrow ends are located represent the serial numbers of the wire winding slots into which the two legs G of the U-shaped sub-conductor 21 are inserted and the layer numbers in the slots, respectively.

For convenience of description, a pair of numbers connected by a symbol-, or =, or +, or → is used to indicate that one U-shaped sub-conductor 21, for example, 28b-37a indicates that two legs G of the U-shaped sub-conductor 21 are located at the 28 th slot layer b and the 37 th slot layer a, respectively, or 11 e=3f indicates that two legs G of the U-shaped sub-conductor 21 are located at the 11 th slot layer e and the 3 rd slot layer f, respectively, or 48e+38f indicates that two legs G of the U-shaped sub-conductor 21 are located at the 48 th slot layer e and the 38 th slot layer f, respectively, or 10 f-20 f indicates that two legs G of the U-shaped sub-conductor 21 are located at the 10 th slot layer f and the 20 th slot layer f, respectively.

Fig. 10 shows the connection of windings at the welded ends, with the dashed line segments with double arrows representing a welded pair of two legs G of adjacent sub-conductors welded together. From the figure, the following three laws can be seen:

rule one, the subconductors of each phase fill three consecutive winding slots per pole, with the shaded area in fig. 10 representing the filled winding slots;

second, the span of each welding pair is equal (welding span is 9), i.e., the distance between adjacent legs G of adjacent U-shaped sub-conductors 21 is equal;

and thirdly, two leg parts G of each welding pair are respectively positioned on a 2N layer and a 2N-1 layer, and N is a positive integer.

With these three rules, in fig. 10, the U-shaped sub-conductor 21 and the I-shaped sub-conductor 22 are arranged according to the following principle, i.e., the conductor arrangement of the two branches of the present embodiment is obtained.

The U-shaped sub-conductors are divided into a first conductor, a second conductor, a third conductor and a fourth conductor.

In this embodiment, the 26U-shaped sub-conductors of each leg of each phase include 8 first conductors, 9 second conductors, 8 third conductors, and 1 fourth conductor. The U-shaped subconductors of each branch of each phase comprise Q-1 first conductors, Q second conductors, Q-1 third conductors and 1 fourth conductor according to the difference of the layer number 2L, and q=the number of the poles 2p×the layer number 2L/4.

In this embodiment, 8 first conductors are directly connected in series with each other, a second conductor and a third conductor are connected in series with each other at intervals, and a fourth conductor connects the first conductors and the second conductors in series to form a queue having the following connection order:

a first conductor, a first conductor, a fourth conductor, a second conductor, a third conductor, a second conductor, a third conductor, a second conductor, third conductor, second conductor, third conductor, second conductor.

And respectively connecting an I-shaped sub-conductor 22 in series at the head and the tail of the queue so that the span between the I-shaped sub-conductor 22 and the adjacent leg G of the first conductor of the head of the queue is 9 or the span between the I-shaped sub-conductor 22 and the adjacent leg G of the second conductor of the tail of the queue is 9, thus obtaining a complete branch.

The specific orientation of the branches is indicated by the numerical numbers and symbols described above. Wherein the span of the first conductor is 9, the first conductor is represented by the form of G-G; the span of the second conductor is 8, the second conductor being represented by g=g; the span of the third conductor is 10, and the third conductor is represented by the form of G+G; the span of the fourth conductor is 10 or 8, and the fourth conductor is represented by G-G.

A first branch:

19a,28b-37a,46b-1a,10b-19c,28d-37c,46d-1c,10d-19e,28f-37e,46f-1e,

10f~20f,

11e=3f,48e+38f,29e=21f,12e+2f,47e=39f,30e+20d,11c=3d,48c+38d,29c=21d,12c+2d,47c=39d,30c+20b,11a=3b,48a+38b,29a=21b,12a+2b,47a=39b,30a。

the series relationship of the conductors in the branches can be interpreted as:

a first I-shaped sub-conductor (the legs of which are arranged on the a layer of the 19 th slot), a first conductor (the two legs of which are arranged on the b layer of the 28 th slot and the a layer of the 37 th slot respectively), a second first conductor (the two legs of which are arranged on the b layer of the 46 th slot and the a layer of the 1 st slot respectively) … …, an eighth first conductor (the two legs of which are arranged on the f layer of the 46 th slot and the e layer of the 1 st slot respectively) a first fourth conductor (the two legs of which are arranged on the f layer of the 10 th slot and the f layer of the 20 th slot respectively), a first second conductor (the two legs of which are arranged on the e layer of the 11 th slot and the f layer of the 3 rd slot respectively), a first third conductor (the two legs of which are arranged on the e layer of the 48 th slot and the f layer of the 38 th slot respectively), a ninth second conductor … …, a second conductor (the two legs of which are arranged on the f layer of the 47 th slot and the f layer of the 39 th slot respectively), and a second conductor (the I-shaped conductor) are arranged on the f layer of the 30 th slot.

It will be appreciated that in the above-described branching sequence, the fourth conductor is singly aligned in a row in order to highlight the relationship of the fourth conductor connecting the first conductor and the second conductor in series, and that in practice the adjacent conductors are all connected in series.

Counting from the leg of the first I-shaped subconductor, the first leg has a total of 54 legs. Filling these legs in the tables of fig. 9 and 10 in order, then a number of 1 to 54 is obtained.

In the figure, the bold underlined numerical numbers represent the trend of the first branch.

It should be noted that the U-shaped sub-conductor 21 is divided into a first conductor, a second conductor, a third conductor and a fourth conductor for convenience of description; in each phase, the two subconductors, which are also classified as first conductors (or second conductors or third conductors or fourth conductors), may also differ in their structure. For example, in the aforesaid alignment, the first and third first conductors differ in their direction of torsional folding at the respective crown ends A1; as another example, the spans of the fourth conductor in the first leg and the fourth conductor in the second leg are different (as further described below).

In the same way, the course of the second branch, indicated by the oblique numerical numbers in the figure, can be obtained.

A second branch:

21a,30b=38a,47b+3a,12b=20a,29b+39a,48b=2a,11b+21c,30d=38c,47d+3c,12d=20c,29d+39c,48d=2c,11d+21e,30f=38e,47f+3e,12f=20e,29f+39e,48f=2e,

11f~19f,

10e-1f,46e-37f,28e-19d,10c-1d,46c-37d,28e-19b,10a-1b,46a-37b,28a。

in the second branch, from the outgoing line end, the arrangement order of the conductors of the second branch is just opposite to that of the first branch according to the types of the conductors. In this embodiment, the order of the conductors of the second branch is:

The I-shaped subconductors 22, second conductors, third conductors, second conductors, a third conductor, a second conductor, a fourth conductor, a first conductor, first conductor, I-shaped subconductor 22.

And the span of the fourth conductor in the first branch and the span of the fourth conductor in the second branch differ by 2.

In the figure, for convenience of illustration, the "first branch outlet end" is simply referred to as "outlet end one", the "second branch outlet end" is simply referred to as "outlet end two", the "first branch lead end" is simply referred to as "lead end one", and the "second branch lead end" is simply referred to as "lead end two".

(second embodiment)

Next, referring to fig. 11 to 13, a winding method of a stator according to a second embodiment of the present application will be described. The second embodiment is a modification of the first embodiment, the same reference numerals are given to the same or similar components as those in the first embodiment in terms of structure or function, and detailed description of these components is omitted.

The main difference between the present embodiment and the first embodiment is that the lead-out end of the present embodiment is located at the welding end of the stator, rather than at the crown end.

In order to facilitate the lead-out of the lead, the head and the tail of each branch are connected together at the crown end. Thus, the two I-shaped sub-conductors 22 at the end and end of each branch are replaced by one U-shaped sub-conductor 21. It will be appreciated that the two legs of the U-shaped sub-conductor 21, which here replace the two I-shaped sub-conductors 22, are located in the same layer.

In contrast to the first embodiment, in the present embodiment, the first branch uses a U-shaped sub-conductor 21 with a span of 11 to connect the first conductor of the head of the team with the second conductor of the tail of the team, and the second branch uses a U-shaped sub-conductor 21 with a span of 7 to connect the second conductor of the head of the team with the first conductor of the tail of the team.

Further, at the welding end, for each branch, two adjacent leg portions G of the adjacent two U-shaped sub-conductors 21 are selected and led out as wire leading-out ends.

Next, referring to fig. 14 to 16, a winding method of a stator according to third to fifth embodiments of the present application will be described. These embodiments are modifications of the first embodiment, the same reference numerals are given to the same or similar components as those in the first embodiment in terms of structure or function, and detailed description of these components is omitted.

For convenience of drawing, only the pair of soldering formed by the adjacent sub-conductors in the present embodiment is shown in fig. 14 to 16, and the lead-out ends of the wires are drawn in the drawing. It will be appreciated that in these embodiments, the lead-out ends of the wires are actually located at the crown end.

(third embodiment)

The main difference between the present embodiment and the first embodiment is that the span values of the second conductor, the third conductor, and the fourth conductor are different. In this embodiment, the second conductor has a span of 10, the third conductor has a span of 8, and the fourth conductor has a span of 11 or 7 (in the first branch, the fourth conductor has a span of 11; in the second branch, the fourth conductor has a span of 7).

According to the direction of the conductor in the branch shown in fig. 14, the following arrangement of the conductor can be obtained.

A first branch:

19a,28b-37a,46b-1a,10b-19c,28d-37c,46d-1c,10d-19e,28f-37e,46f-1e,

10f~21f,

12e=2f,47e+39f,30e=20f,11e+3f,48e=38f,29e+21d,12c=2d,47c+39d,30c=20d,11c+3d,48c=38d,29c+21b,12a=2b,47a+39b,30a=20b,11a+3b,48a=38b,29a。

a second branch:

20a,29b=39a,48b+2a,11b=21a,30b+38a,47b=3a,12b+20c,29d=39c,48d+2c,11d=21c,30d+38c,47d=3c,12d-20e,29f=39e,48f+2e,11f=21e,30f+38e,47f=3e,

12f~19f,

10e-1f,46e-37f,28e-19d,10c-1d,46c-37d,28c-19b,10a-1b,46a-37b,28a。

(fourth embodiment)

The main difference between this embodiment and the first embodiment is that the span values of the second conductor and the third conductor are different. In the present embodiment, the span of the second conductor is 10 and the span of the third conductor is 8.

According to the routing direction of the conductors in the branches shown in fig. 15, the following arrangement of the conductors can be obtained.

A first branch:

19a,28b=38a,47b+1a,10b=20a,29b+37a,46b=2a,11b+19c,28d=38c,47d+1c,10d=20c,29d+37c,46d=2c,11d+19e,28f=38e,47f+1e,10f=20e,29f+37e,46f=2e,

11f~21f,

12e-3f,48e-39f,30e-21d,12c-3d,48c-39d,30c-21b,12a-3b,48a-39b,30a。

a second branch:

21a,30b-39a,48b-3a,12b-21c,30d-39c,48d-3c,12d-21e,30f-39e,48f-3e,

12f~20f,

11e=1f,46e+38f,29e=19f,10e+2f,47e=37f,28e+20d,11c=1d,46c+38d,29c=19d,10c+2d,47c=37d,28c+20b,11a=1b,46a+38b,29a=19b,10a+2b,47a=37b,28a。

(fifth embodiment)

The main difference between this embodiment and the first embodiment is that the span of the fourth conductor is different. In the present embodiment, the span of the fourth conductor is 11 or 7. Or more precisely, in the first branch, the span of the fourth conductor is 11; in the second branch, the fourth conductor has a span of 7.

According to the direction of the conductor in the branch shown in fig. 16, the following arrangement of the conductor can be obtained.

A first branch:

20a,29b=37a,46b+2a,11b=19a,28b+38a,47b=1a,10b+20c,29d=37c,46d+2c,11d=19c,28d+38c,47d=1c,10d+20e,29f=37e,46f+2e,11f=19e,28f+38e,47f=1e,

10f~21f,

12e-3f,48e-39f,30e-21d,12c-3d,48c-39d,30c-21b,12a-3b,48a-39b,30a。

a second branch:

21a,30b-39a,48b-3a,12b-21c,30d-39c,48d-3c,12d-21e,30f-39e,48f-3e,

12f~19f,

10e=2f,47e+37f,28e=20f,11e+1f,46e=38f,29e+19d,10c=2d,47c+37d,28c=20d,11c+1d,46c=38d,29c+19b,10a=2b,47a+37b,28a=20b,11a+1b,46a=38b,29a。

(sixth embodiment)

Next, referring to fig. 17, a winding method of a stator according to a sixth embodiment of the present application will be described. The sixth embodiment is another modification of the first embodiment, and the main difference between the present embodiment and the first embodiment is that the arrangement positions of the fourth conductor and the I-shaped sub-conductor 22 are reversed in the present embodiment.

In contrast to the first embodiment, in each branch, the position where 2I-shaped sub-conductors 22 were originally provided is replaced by one U-shaped sub-conductor 21; the location where the fourth conductor was originally provided is replaced by 2I-shaped sub-conductors 22.

It should be understood that references herein to "swapping" or "replacing" are merely changes in conductor form, and not directly inserting the original fourth conductor into the location where the I-shaped sub-conductor 22 is located (a difference in span would render such an operation impractical). It can be seen that in the first embodiment, the span of the fourth conductor in the first branch is 10; in the present embodiment, however, the span of the U-shaped sub-conductor 21 provided in the first branch in place of the 2I-shaped sub-conductors 22 is 11.

In this embodiment, the lead wires of the windings are located in the f-layer. It will be appreciated that the winding lead-out may also be tuned to the a-layer with appropriate changes in the position of the subconductors.

It will be appreciated that the above-described embodiments and portions of aspects or features thereof may be suitably combined. For example, the wire leads of the third to sixth embodiments may be provided at the solder terminals instead of the crown terminals.

(seventh embodiment)

Next, referring to fig. 18 and 19, a winding method of a stator according to a seventh embodiment of the present application will be described. The seventh embodiment is another modification of the first embodiment.

Fig. 19 shows the connection of windings at the welded ends, with the dashed line segments with double arrows representing a welded pair of two legs G of adjacent sub-conductors welded together. From the figure, the following three laws can be seen:

regularly, the flat wire winding 20 occupies three consecutive wire slots in the odd layers and three consecutive wire slots in the even layers of each phase of each pole. The hatched area in the figure represents the winding slot occupied by the flat wire winding 20 in each phase of each pole. The slots of the odd layers of the same phase and the same pole are aligned in the circumferential direction of the stator core 10, the slots of the even layers of the same phase and the same pole are aligned in the circumferential direction, and the winding slots occupied by the even layers and the odd layers of the adjacent layers of each pole of the flat wire winding 20 are staggered by one slot in the circumferential direction as viewed in the axial direction of the stator core 10.

It should be noted that this offset between the layers, or the offset of the slots occupied by the different layers in the circumferential direction C, reduces the winding harmonics and thus reduces the NVH of the motor during operation.

Second, the span of each welding pair is equal (welding span is 10), i.e., the distances between adjacent legs G of adjacent sub-conductors (including between the U-shaped sub-conductors 21, and between the I-shaped sub-conductors 22 and the U-shaped sub-conductors 21) are equal.

With these three rules, in fig. 18, the U-shaped sub-conductor 21 and the I-shaped sub-conductor 22 are set according to the following principle, i.e., the conductor arrangement of the two branches of the present embodiment is obtained.

Similarly to the first embodiment, the 26U-shaped sub-conductors of each leg of each phase comprise 8 first conductors, 9 second conductors, 8 third conductors and 1 fourth conductor.

The 8 first conductors are directly connected in series with each other, the second conductor and the third conductor are connected in series with each other at intervals, and the fourth conductor connects the first conductor and the second conductor in series.

An I-shaped sub-conductor 22 is respectively connected in series with the head and the tail of the queue, so that the span between the I-shaped sub-conductor 22 and the adjacent leg G of the first conductor of the head of the queue is 10, or the span between the I-shaped sub-conductor 22 and the adjacent leg G of the second conductor of the tail of the queue is 10, and a complete branch is obtained.

The specific orientation of the branches is indicated by the numerical numbers and symbols described above.

A first branch:

19a,29b-37a,47b-1a,11b-19c,29d-37c,47d-1c,11d-19e,29f-37e,47f-1e,

11f~21f,

11e=4f,48e+39f,29e=22f,12e+3f,47e=40f,30e+21d,11c=4d,48c+39d,29c=22d,12c+3d,47c=40d,30c+21b,11a=4b,48a+39b,29a=22b,12a+3b,47a=40b,30a。

a second branch:

21a,31b=38a,48b+3a,13b=20a,30b+39a,49b=2a,12b+21c,31d=38c,48d+3c,13d=20c,30d+39c,49d=2c,12d+21e,31f=38e,48f+3e,13f=20e,30f+39e,49f=2e,

12f~20f,

10e-2f,46e-38f,28e-20d,10c-2d,46c-38d,28c-20b,10a-2b,46a-38b,28a。

the span of the fourth conductor in the first branch and the span of the fourth conductor in the second branch differ by 2.

Next, referring to fig. 20 to 22, a winding method of a stator according to eighth to tenth embodiments of the present application will be described. These embodiments are modifications of the seventh embodiment, the same reference numerals are given to the same or similar components as those in the seventh embodiment in terms of structure or function, and detailed description of these components is omitted.

For convenience of drawing, only the pair of soldering formed by the adjacent sub-conductors in the present embodiment is shown in fig. 20 to 22, and the lead-out ends of the wires are drawn in the drawing. It will be appreciated that in these embodiments, the lead-out ends of the wires are actually located at the crown end.

(eighth embodiment)

The main difference between this embodiment and the seventh embodiment is that the span values of the second conductor, the third conductor, and the fourth conductor are different. In this embodiment, the second conductor has a span of 9, the third conductor has a span of 7, and the fourth conductor has a span of 11 or 7 (in the first branch, the fourth conductor has a span of 11; in the second branch, the fourth conductor has a span of 7).

According to the routing direction of the conductors in the branches shown in fig. 20, the following arrangement of the conductors can be obtained.

A first branch:

19a,29b-37a,47b-1a,11b-19c,29d-37c,47d-1c,11d-19e,29f-37e,47f-1e,

11f~22f,

12e=3f,47e+40f,30e=21f,11e+4f,48e=39f,29e+22d,12c=3d,47c+40d,30c=21d,11c+4d,48c=39d,29c+22b,12a=3b,47a+40b,30a=21b,11a+4b,48a=39b,29a。

a second branch:

20a,30b=39a,49b+2a,12b=21a,31b+38a,48b=3a,13b+20c,30d=39c,49d+2c,12d=21c,31d+38c,48d=3c,13d+20e,30f=39e,49f+2e,12f=21e,31f+38e,48f=3e,

13f~20f,

10e-2f,46e-38f,28e-20d,10c-2d,46c-38d,28c-20b,10a-2b,46a-38b,28a。

(ninth embodiment)

The main difference between this embodiment and the seventh embodiment is that the span values of the second conductor and the third conductor are different. In the present embodiment, the span of the second conductor is 9 and the span of the third conductor is 7.

According to the direction of the conductor in the branch shown in fig. 21, the following arrangement of the conductor can be obtained.

A first branch:

19a,29b=38a,48b+1a,11b=20a,30b+37a,47b=2a,12b+19c,29d=38c,48d+1c,11d=20c,30d+37c,47d=2c,12d+19e,29f=38e,48f+1e,11f=20e,30f+37e,47f=2e,

12f~22f,

12e-4f,48e-40f,30e-22d,12c-4d,48c-40d,30c-22b,12a-4b,48a-40b,30a。

a second branch:

21a,31b-39a,49b-3a,13b-21c,31d-39c,49d-3c,13d-21e,31f-39e,49f-3e,

13f~21f,

11e=2f,46e+39f,29e=20f,10e+3f,47e=38f,28e+21d,11c=2d,46c+39d,29c=20d,10c+3d,47c=38d,28c+21b,11a=2b,46a+39b,29a=20b,10a+3b,47a=38b,28a。

(tenth embodiment)

The main difference between this embodiment and the seventh embodiment is that the span value of the fourth conductor is different. In the present embodiment, the span of the fourth conductor is 11 or 7. Or more precisely, in the first branch, the span of the fourth conductor is 11; in the second branch, the fourth conductor has a span of 7.

According to the direction of the conductor in the branch shown in fig. 22, the following arrangement of the conductor can be obtained.

A first branch:

20a,30b=37a,47b+2a,12b=19a,29b+38a,48b=1a,11b+20c,30d=37c,47d+2c,12d=19c,29d+38c,48d=1c,11d+20e,30f=37e,47f+2e,12f=19e,29f+38e,48f=1e,

11f~22f,

12e-4f,48e-40f,30e-22d,12c-4d,48c-40d,30c-22b,12a-4b,48a-40b,30a。

a second branch:

21a,31b-39a,49b-3a,13b-21c,31d-39c,49d-3c,13d-21e,31f-39e,49f-3e,

13f~20f,

10e=3f,47e+38f,28e=21f,11e+2f,46e=39f,29e+20d,10c=3d,47c+38d,28c=21d,11c+2d,46c=39d,29c+20b,10a=3b,47a+38b,28a=21b,11a+2b,46a=39b,29a。

next, referring to fig. 23 to 26, a winding method of a stator according to eleventh to fourteenth embodiments of the present application. These embodiments are modifications of the seventh embodiment. The eleventh to fourteenth embodiments differ from the seventh embodiment mainly in two ways:

First, these embodiments are opposite to the first embodiment in the misalignment direction of the parity layer. The winding grooves are marked with serial numbers in the figure, and in the first embodiment, the odd layers occupied by the windings 20 of each phase of each pole are one serial number earlier than the even layers; while in the fifth to eighth embodiments, the odd layers occupied by the windings 20 of each phase of each pole are delayed by one sequence number from the even layers.

Second, the span between adjacent legs of adjacent subconductors, or the span of each weld pair, is 8.

(eleventh embodiment)

A winding manner of the stator according to the eleventh embodiment of the present application will be described with reference to fig. 23.

In addition to the two main differences described above, this embodiment differs mainly in comparison with the seventh embodiment in that: the spans of the first conductor, the second conductor, the third conductor and the fourth conductor are different. In this embodiment, the span of the first conductor is 10; the span of the second conductor is 9; the third conductor has a span of 11; the fourth conductor has a span of 10 or 8, or more precisely, in the first branch the span of 10 and in the second branch the span of 8.

According to the direction of the conductor in the branch shown in fig. 23, the following arrangement of the conductor can be obtained.

A first branch:

20a,28b-38a,46b-2a,10b-20c,28d-38c,46d-2c,10d-20e,28f-38e,46f-2e,

10f~20f,

12e=3f,49e+38f,30e=21f,13e+2f,48e=39f,31e+20d,12c=3d,49c+38d,30c=21d,13c+2d,48c=39d,31c+20b,12a=3b,49a+38b,30a=21b,13a+2b,48a=39b,31a。

a second branch:

22a,30b=39a,47b+4a,12b=21a,29b+40a,48b=3a,11b+22c,30d=39c,47d+4c,12d=21c,29d+40c,48d=3c,11d+22e,30f=39e,47f+4e,12f=21e,29f+40e,48f=3e,

11f~19f,

11e-1f,47e-37f,29e-19d,11c-1d,47c-37d,29c-19b,11a-1b,47a-37b,29a。

(twelfth embodiment)

The twelfth embodiment may also be regarded as a modification of the eleventh embodiment, and the main difference between the present embodiment and the eleventh embodiment is that the span values of the second conductor, the third conductor, and the fourth conductor are different. In this embodiment, the second conductor has a span of 11, the third conductor has a span of 9, and the fourth conductor has a span of 11 or 7 (in the first branch, the fourth conductor has a span of 11; in the second branch, the fourth conductor has a span of 7).

According to the direction of the conductor in the branch shown in fig. 24, the following arrangement of the conductor can be obtained.

A first branch:

20a,28b-38a,46b-2a,10b-20c,28d-38c,46d-2c,10d-20e,28f-38e,46f-2e,

10f~21f,

13e=2f,48e+39f,31e=20f,12e+3f,49e=38f,30e+21d,13c=2d,48c+39d,31c=20d,12c+3d,49c=38d,30c+21b,13a=2b,48a+39b,31a=20b,12a+3b,49a=38b,30a。

a second branch

21a,29b=40a,48b+3a,11b=22a,30b+39a,47b=4a,12b+21c,29d=40c,48d+3c,11d=22c,30d+39c,47d=4c,12d+21e,29f=40e,48f+3e,11f=22e,30f+39e,47f=4e,

12f~19f,

11e-1f,47e-37f,29e-19d,11c-1d,47c-37d,29c-19b,11a-1b,47a-37b,29a。

(thirteenth embodiment)

The thirteenth embodiment may also be regarded as a modification of the eleventh embodiment, and the main difference between the present embodiment and the eleventh embodiment is that the span values of the second conductor and the third conductor are different. In the present embodiment, the span of the second conductor is 11 and the span of the third conductor is 9.

According to the routing direction of the conductors in the branches shown in fig. 25, the following arrangement of the conductors can be obtained.

A first branch:

20a,28b=39a,47b+2a,10b=21a,29b+38a,46b=3a,11b+20c,28d=39c,47d+2c,10d=21c,29d+38c,46d=3c,11d+20e,28f=39e,47f+2e,10f=21e,29f+38e,46f=3e,

11f~21f,

13e-3f,49e-39f,31e-21d-13c-3d,49c-39d,31c-21b-13a-3b,49a-39b,31a。

a second branch:

22a,30b-40a,48b-4a,12b-22c,30d-40c,48d-4c,12d-22e,30f-40e,48f-4e,

12f~20f,

12e=1f,47e+38f,30e=19f,11e+2f,48e=37f,29e+20d,12c=1d,47c+38d,30c=19d,11c+2d,48c=37d,29c+20b,12a=1b,47a+38b,30a=19b,11a+2b,48a=37b,29a。

(fourteenth embodiment)

The fourteenth embodiment may be regarded as a modification of the eleventh embodiment, and the main difference between the present embodiment and the eleventh embodiment is that the span value of the fourth conductor is different. In the present embodiment, the span of the fourth conductor is 11 or 7. Or more precisely, in the first branch, the span of the fourth conductor is 11; in the second branch, the fourth conductor has a span of 7.

According to the routing direction of the conductors in the branches shown in fig. 26, the following arrangement of the conductors can be obtained.

A first branch:

21a+29b=38a,46b+3a,11b=20a,28b+39a,47b=2a,10b+21c+29d=38c,46d+3c,11d=20c,28d+39c,47d=2c,10d+21e+29f=38e,46f+3e,11f=20e,28f+39e,47f=2e,

10f~21f,

13e-3f,49e-39f,31e-21d,13c-3d,49c-39d,31c-21b,13a-3b,49a-39b,31a。

a second branch:

22a,30b-40a,48b-4a,12b-22c,30d-40c,48d-4c,12d-22e,30f-40e,48f-4e,

12f~19f,

11e=2f,48e+37f,29e=20f,12e+1f,47e=38f,30e+19d,11c=2d,48c+37d,29c=20d,12c+1d,47c=38d,30c+19b,11a=2b,48a+37b,29a=20b,12a+1b,47a=38b,30a。

(fifteenth embodiment)

Next, referring to fig. 27 to 28, a winding method of a stator according to a fifteenth embodiment of the present application will be described. The fifteenth embodiment is a modification of the seventh embodiment, and the main difference between the present embodiment and the seventh embodiment is that the wire lead-out terminal of the present embodiment is located at the welding end of the stator, not at the crown end.

In order to facilitate the lead-out of the lead, the head and the tail of each branch are connected together at the crown end. Thus, the two I-shaped sub-conductors 22 at the end and end of each branch are replaced by one U-shaped sub-conductor 21 (also called fifth conductor or additional conductor).

In contrast to the seventh embodiment, in the present embodiment, the first branch connects the first conductor of the head part and the second conductor of the tail part using one U-shaped sub-conductor 21 with a span of 11, and the second branch connects the second conductor of the head part and the first conductor of the tail part using one U-shaped sub-conductor 21 with a span of 7.

(sixteenth embodiment)

Next, referring to fig. 29, a winding method of a stator according to a sixteenth embodiment of the present application will be described. The sixteenth embodiment is a modification of the seventh embodiment, and the main difference between the present embodiment and the seventh embodiment is that the arrangement positions of the fourth conductor and the I-shaped sub-conductor 22 are reversed in the present embodiment.

In contrast to the seventh embodiment, in each branch, the position where 2I-shaped sub-conductors 22 were originally provided is replaced by one U-shaped sub-conductor 21 (the two legs of the U-shaped sub-conductor 21 are located in the same layer); the location where the fourth conductor was originally provided is replaced by 2I-shaped sub-conductors 22.

It will be appreciated that the above-described embodiments and portions of aspects or features thereof may be suitably combined. For example, the wire terminals of the ninth to sixteenth embodiments may be provided at the soldering terminal instead of the crown terminal.

(seventeenth embodiment)

Referring to fig. 30 to 31, a winding manner of a stator according to a seventeenth embodiment of the present application is described. The seventeenth embodiment is another modification of the first embodiment.

For convenience of description, the U-shaped sub-conductors 21 in this embodiment are divided into seven types, namely, a first conductor, a second conductor, a third conductor, a fourth conductor, a fifth conductor, a sixth conductor, and a seventh conductor.

The seven U-shaped sub-conductors are represented by a symbol-, or =, or #, or & a connected pair of numbers, respectively. For example, 28b-37a indicates that the two legs G of the first conductor are located at the 29 th and 37 th slot b and a layers, respectively, 11e=4f indicates that the two legs G of the second conductor are located at the 11 th and 4 th slot e and f layers, respectively, 48e+39f indicates that the two legs G of the third conductor are located at the 48 th and 39 th slot e and f layers, respectively, 11 f-21 f indicates that the two legs G of the fourth conductor are located at the 11 th and 21 th slot f layers, 29d x 37c indicates that the two legs G of the fifth conductor are located at the 29 th and 37 th slot d layers, respectively, 11c#4d indicates that the two legs G of the sixth conductor are located at the 11 th and 4 th slot c and d layers, respectively, 48c &39d indicates that the two legs G of the seventh conductor are located at the 48 th and 39 th slot c and d layers, respectively.

Fig. 31 shows the connection of windings at the welded ends, with the dashed line segments with double arrows representing a welded pair of two legs G of adjacent sub-conductors welded together. From the figure, the following three laws can be seen:

in one rule, the slot occupied by the flat wire winding 20 occupies three continuous inner winding slots per pole in L layers located radially inside, three continuous outer winding slots per pole in L layers located radially outside, three inner winding slots and three outer winding slots per pole in each phase are staggered by one slot position in the circumferential direction.

Rule two, for those pairs with two legs at the L layer and l+1 layer respectively, the span is 10. While for other welded pairs the span between the two legs G is 9. For convenience of description, a standard span k=9 is defined as follows. The L-th layer and the l+1-th layer are also referred to as dislocation layers hereinafter.

With the aid of these three rules, in fig. 30, the U-shaped sub-conductor 21 and the I-shaped sub-conductor 22 are arranged according to the following principle, i.e., the conductor arrangement of the two branches of the present embodiment is obtained.

In this embodiment, the 26U-shaped subconductors of each leg of each phase include 6 first conductors, 6 second conductors, 6 third conductors, 1 fourth conductor, 2 fifth conductors, 3 sixth conductors, 2 seventh conductors.

Here, for the case where half of the number of layers L is an odd number, the number of U-shaped sub-conductors per each leg of each phase is calculated in the following manner: Q-P first conductors, Q-P second conductors, Q-P third conductors, 1 fourth conductor, P-1 fifth conductors, P sixth conductors and P-1 seventh conductors, P is the pole pair number, Q=the pole number 2P×the number of layers 2L/4.

In each branch, the arrangement of the conductors satisfies the following rule.

Rule one: the two legs G of the first conductor, the second conductor, the third conductor, the fifth conductor, the sixth conductor and the seventh conductor are inserted in two adjacent layers in the winding slot, and the two legs G of the fourth conductor are inserted in the same layer in the winding slot.

Rule II: each branch comprises a first queue and a second queue, and the fourth conductor is connected with the first queue and the second queue in series to form a branch queue. That is, the tributary queue is: first queue-fourth conductor-second queue.

Rule III: for the first queue, it includes a first conductor and a fifth conductor in series with each other. And, in addition, the processing unit,

in the first queue, if the two legs G of the U-shaped sub-conductor 21 need to be arranged in a dislocation layer, a fifth conductor is used; the first conductor is used if the two legs G of the U-shaped sub-conductor 21 need to be arranged in other adjacent layers than the dislocated layer.

For the second queue, it includes a second conductor and a third conductor in series with each other at intervals, and a sixth conductor and a seventh conductor in series with each other at intervals. And, in addition, the processing unit,

in the second queue, if the two legs G of the U-shaped sub-conductor 21 need to be arranged in the dislocation layer, a sixth conductor and a seventh conductor are used; if the two legs G of the U-shaped sub-conductor 21 need to be arranged in other adjacent layers than the dislocated layer, a second conductor and a third conductor are used.

According to the three rules, the first conductors are arranged from the 28 th slot and the b th layer, and a first queue and a second queue with the following connection sequence are formed.

A first queue:

a first conductor, a fifth conductor, a first conductor, and a first conductor.

A second queue:

a second conductor, a third conductor, a sixth conductor, a seventh conductor, a sixth conductor, a third conductor, a second conductor, a third conductor, a second conductor.

The complete queue formed by the fourth conductor connecting the first queue and the second queue is:

a first conductor, a fifth conductor, a first conductor, a first conductor, a fourth conductor, a second conductor, a third conductor, a second conductor, a third conductor, a sixth conductor, a seventh conductor, a sixth conductor, a third conductor, a second conductor.

And the first and the tail of the branch line are respectively connected in series with an I-shaped sub-conductor 22, so that the span between the I-shaped sub-conductor 22 and the adjacent leg G of the first conductor of the first line is K, or the span between the I-shaped sub-conductor 22 and the adjacent leg G of the second conductor of the tail line is K, and a complete branch line is obtained.

A first branch:

19a,28b-37a,46b-1a,10b-19c,29d*37c,47d*1c,11d-20e,29f-38e,47f-2e,

11f~21f,

12e=4f,49e+39f,30e=22f,13e+3f,48e=40f,31e+21d,11c#4d,48c&39d,29c#22d,12c&3d,47c#40d,30c+20b,11a=3b,48a+38b,29a=21b,12a+2b,47a=39b,30a。

a first I-shaped sub-conductor (the legs of which are arranged on the a layer of the 19 th slot), a first conductor (the two legs of which are respectively arranged on the b layer of the 28 th slot and the a layer of the 37 th slot), a second first conductor (the two legs of which are respectively arranged on the b layer of the 46 th slot and the a layer of the 1 st slot), a third first conductor (the two legs of which are respectively arranged on the b layer of the 10 th slot and the c layer of the 19 th slot), a first fifth conductor (the two legs of which are respectively arranged on the d layer of the 29 th slot and the c layer of the 37 th slot), a second fifth conductor (the two legs of which are respectively arranged on the d layer of the 47 th slot and the c layer of the 1 st slot), a sixth first conductor … … (the two legs of which are respectively arranged on the f layer of the 47 th slot and the e layer of the 2 nd slot), a fourth conductor (two legs of which are respectively disposed at the f layer of the 11 th slot and the f layer of the 21 st slot), a first second conductor (two legs of which are respectively disposed at the e layer of the 12 th slot and the f layer of the 4 th slot), a first third conductor (two legs of which are respectively disposed at the e layer of the 49 th slot and the f layer of the 39 th slot) … …, a third second conductor (two legs of which are respectively disposed at the e layer of the 48 th slot and the f layer of the 40 th slot), a third conductor (two legs of which are respectively disposed at the e layer of the 31 st slot and the d layer of the 21 st slot), a sixth conductor (two legs of which are respectively disposed at the c layer of the 11 th slot and the d layer of the 4 th slot), a first seventh conductor (with two legs disposed in the c-th layer of the 48 th slot and the d-th layer of the 39 th slot) … … is connected in series with a sixth second conductor (with two legs disposed in the a-th layer of the 47 th slot and the b-th layer of the 39 th slot), and a second I-shaped subconductor (with legs disposed in the a-th layer of the 30 th slot) is connected in series.

A second branch:

21a,30b=38a,47b+3a,12b=20a,29b+39a,48b=2a,11b+21c,31d#38c,48d&3c,13d#20c,30d&39c,49d#2c,12d+22e,31f=39e,48f+4e,13f=21e,30f+40e,49f=3e,

12e~20f,

11e-2f,47e-38f,29e-20d,10c*2d,46c*38d,28c-19b,10a-1b,46a-37b,28a。

in the second branch, from the outgoing line end, the arrangement order of the conductors of the second branch is just opposite to that of the first branch according to the types of the conductors.

Next, referring to table 1, fig. 32 to 38, a winding method of a stator according to eighteenth to twenty-fourth embodiments of the present application will be described. These embodiments are variations of the seventeenth embodiment.

For convenience of drawing, only the pair of soldering formed by the adjacent sub-conductors in the present embodiment is shown in fig. 32 to 38, and the lead-out ends of the wires are drawn in the drawing. It will be appreciated that in these embodiments, the lead-out ends of the wires are actually located at the crown end.

The eighteenth to twenty-fourth embodiments are mainly different from the seventeenth embodiment in that: the second conductor, the third conductor, the fourth conductor, the sixth conductor, and the seventh conductor have different spans. While the spans of the first conductor and the fifth conductor of the first to fourth embodiments are all the same.

TABLE 1 spans of different conductors in seventeenth through twenty-fourth embodiments

-a first conductor

=second conductor

+third conductor

Fourth conductor

* Fifth conductor

Sixth conductor #

&Seventh conductor

Embodiment 17

K

K-1

K+1

K+1/K-1

K-1

K-2

K

Embodiment 18

K

K+1

K-1

K+2/K-2

K-1

K

K-2

Embodiment 19

K

K+1

K-1

K-1/K+1

K-1

K

K-2

Embodiment 20

K

K-1

K+1

K-2/K+2

K-1

K-2

K

Embodiment 21

K

K-1

K+1

K+1/K-1

K+1

K

K+2

Embodiment 22

K

K+1

K-1

K+2/K-2

K+1

K+2

K

Embodiment 23

K

K+1

K-1

K-1/K+1

K+1

K+2

K

Embodiment 24

K

K-1

K+1

K-2/K+2

K+1

K

K+2

(eighteenth embodiment)

In this embodiment, the second conductor has a span of 10, the third conductor has a span of 8, the fourth conductor has a span of 11 or 7 (in the first branch, the fourth conductor has a span of 11; in the second branch, the fourth conductor has a span of 7), the fifth conductor has a span of 8, the sixth conductor has a span of 9, and the seventh conductor has a span of 7.

According to the routing direction of the conductors in the branches shown in fig. 32, the following arrangement of the conductors can be obtained.

A first branch:

19a,28b-37a,46b-1a,10b-19c,29d*37c,47d*1c,11d-20e,29f-38e,47f-2e,

11f~22f,

13e=3f,48e+40f,31e=21f,12e+4f,49e=39f,30e+22d,12c#3d,47c&40d,30c#21d,11c&4d,48c#39d,29c+21b,12a=2b,47a+39b,30a=20b,11a+3b,48a=38b,29a。

a second branch

20a,29b=39a,48b+2a,11b=21a,30b+38a,47b=3a,12b+20c,30d#39c,49d&2c,12d#21c,31d&38c,48d#3c,13d+21e,30f=40e,49f+3e,12f=22e,31f+39e,48f=4e,

13f~20f,

11e-2f,47e-38f,29e-20d,10c*2d,46c*38d,28c-19b,10a-1b,46a-37b,28a。

(nineteenth embodiment)

In this embodiment, the second conductor has a span of 10, the third conductor has a span of 8, the fourth conductor has a span of 8 or 10 (in the first branch, the fourth conductor has a span of 8; in the second branch, the fourth conductor has a span of 10), the sixth conductor has a span of 9, and the seventh conductor has a span of 7.

According to the routing direction of the conductors in the branches shown in fig. 33, the following arrangement of the conductors can be obtained.

A first branch:

12f~22f,

12e-4f,48e-40f,30e-22d,12c-4d,48c-40d,30c-22b,12a-4b,48a-40b,30a。

a second branch:

21a,31b-39a,49b-3a,13b-21c,31d-39c,49d-3c,13d-21e,31f-39e,49f-3e,

13f~21f,

(twentieth embodiment)

In this embodiment, the second conductor has a span of 8, the third conductor has a span of 10, the fourth conductor has a span of 7 or 11 (in the first branch, the fourth conductor has a span of 7; in the second branch, the fourth conductor has a span of 11), the sixth conductor has a span of 7, and the seventh conductor has a span of 9.

According to the routing direction of the conductors in the branches shown in fig. 34, the following arrangement of the conductors can be obtained.

A first branch:

20a,29b=37a,46b+2a,11b=19a,28b+38a,47b=1a,10b+20c,30d#37c,47d&2c,12d#19c,29d&38c,48d#1c,11d+21e,30f=38e,47f+3a,12f=20e,29f+39e,48f=2e,

11f~22f,

13e-4f,49e-40f,31e-22d,12c*4d,48c*40d,30c-21b,12a-3b,48a-39b,30a。

a second branch:

21a,30b-39a,48b-3a,12b-21c,31d*39c,49d*3c,13d-22e,31f-40e,49f-4e,

13f~20f,

11e=3f,48e+38f,29e=21f,12e+2f,47e=39f,30e+20d,10c#3d,47c&38d,28c#21d,11c&2d,46c#39d,29c+19b,10a=2b,47a+37b,28a=20b,11a+1b,46a=38b,29a。

referring to fig. 35 to 38, twenty-first to twenty-fourth embodiments of the present application are another modification of the seventeenth embodiment.

The twenty-first to twenty-fourth embodiments differ from the seventeenth embodiment mainly in two ways:

first, these embodiments are opposite to the first embodiment in the misalignment direction of the misalignment layer. The winding grooves are numbered in the figure, and in the first embodiment, the grooves occupied by the windings 20 of each phase of each pole in the 1 st to 3 rd layers (a to c) are advanced by one number from the grooves occupied by the 4 th to 6 th layers (d to f); in the fifth to eighth embodiments, the slots occupied by the windings 20 of each phase of each pole in the 1 st to 3 rd layers (a to c) are delayed by one sequence number from the slots occupied by the 4 th to 6 th layers (d to f).

Second, the span of the fifth conductor is k+1=10, and the spans of the sixth and seventh conductors are selected between K and k+2.

(twenty-first embodiment)

In this embodiment, the second conductor has a span of 8, the third conductor has a span of 10, the fourth conductor has a span of 10 or 8 (in the first branch, the fourth conductor has a span of 10; in the second branch, the fourth conductor has a span of 8), the sixth conductor has a span of 9, and the seventh conductor has a span of 11.

According to the routing direction of the conductors in the branches shown in fig. 35, the following arrangement of the conductors can be obtained.

A first branch:

20a,29b-38a,47b-2a,11b-20c,28d*38c,46d*2c,10d-19e,28f-37e,46f-1e,

10f~20f,

11e=3f,48e+38f,29e=21f,12e+2f,47e=39f,30e+20d,12c#3d,49c&38d,30c#21d,13c&2d,48c#39d,31c+21b,12a=4b,49a+39b,30a=22b,13a+3b,48a=40b,31a。

a second branch

22a,31b=39a,48b+4a,13b=21a,30b+40a,49b=3a,12b+22c,30d#39c,47d&4c,12d#21c,29d&40c,48d#3c,11d+21e,30f=38e,47f+3e,12f=20e,29f+39e,48f=2e,

11f~19f,

10e-1f,46e-37f,28e-19d,11c*1d,47c*37d,29c-20b,11a-2b,47a-38b,29a。

(twenty-second embodiment)

In this embodiment, the second conductor has a span of 10, the third conductor has a span of 8, the fourth conductor has a span of 11 or 7 (in the first branch, the fourth conductor has a span of 11; in the second branch, the fourth conductor has a span of 7), the sixth conductor has a span of 11, and the seventh conductor has a span of 9.

According to the routing direction of the conductors in the branches shown in fig. 36, the following arrangement of the conductors can be obtained.

A first branch:

20a,29b-38a,47b-2a,11b-20c,28d*38c,46d*2c,10d-19e,28f-37e,46f-1e,

10f~21f,

12e=2f,47e+39f,30e=20f,11e+3f,48e=38f,29e+21d,13c#2d,48c&39d,31c#20d,12c&3d,49c#38d,30c+22b,13a=3b,48a+40b,31a=21b,12a+4b,49a=39b,30a。

a second branch:

21a,30b=40a,49b+3a,12b=22a,31b+39a,48b=4a,13b+21c,29d#40c,48d&3c,11d#22c,30d&39c,47d#4c,12d+20e,29f=39e,48f+2e,11f=21e,30f+38e,47f=3e,

12f~19f,

10e-1f,46e-37f,28e-19d,11c*1d,47c*37d,29c-20b,11a-2b,47a-38b,29a。

(twenty-third embodiment)

In this embodiment, the second conductor has a span of 10, the third conductor has a span of 8, the fourth conductor has a span of 8 or 10 (in the first branch, the fourth conductor has a span of 8; in the second branch, the fourth conductor has a span of 10), the sixth conductor has a span of 11, and the seventh conductor has a span of 9.

According to the routing direction of the conductors in the branches shown in fig. 37, the following arrangement of the conductors can be obtained.

A first branch:

20a,29b=39a,48b+2a,11b=21a,30b+38a,47b=3a,12b+20c,28d#39c,47d&2c,10d#21c,29d&38c,46d#3c,11d+19e,28f=38e,47f+1e,10f=20e,29f+37e,46f=2e,

11f~21f,

12e-3f,48e-39f,30e-21d,13c*3d,49c*39d,31c-22b,13a-4b,49a-40b,31a。

a second branch

22a,31b-40a,49b-4a,13b-22c,30d*40c,48d*4c,12d-21e,30f-39e,48f-3e,

12f~20f,

11e=1f,46e+38f,29e=19f,10e+2f,47e=37f,28e+20d,12c#1d,47c&38d,30c#19d,11c&2d,48c#37d,29c+21b,12a=2b,47a+39b,30a=20b,11a+3b,48a=38b,29a。

(twenty-fourth embodiment)

In this embodiment, the second conductor has a span of 8, the third conductor has a span of 10, the fourth conductor has a span of 7 or 11 (in the first branch, the fourth conductor has a span of 7; in the second branch, the fourth conductor has a span of 11), the sixth conductor has a span of 9, and the seventh conductor has a span of 11.

According to the routing direction of the conductors in the branches shown in fig. 38, the following arrangement of the conductors can be obtained.

A first branch:

21a,30b=38a,47b+3a,12b=20a,29b+39a,48b=2a,11b+21c,29d#38c,46d&3c,11d#20c,28d&39c,47d#2c,10d+20e,29f=37e,46f+2e,11f=19e,28f+38e,47f=1e,

10f~21f,

12e-3f,48e-39f,30e-21d,13c*3d,49c*39d,31c-22b,13a-4b,49a-40b,31a。

a second branch

22a,31b-40a,49b-4a,13b-22c,30d*40c,48d*4c,12d-21e,30f-39e,48f-3e,

12f~19f,

10e=2f,47e+37f,28e=20f,11e+1f,46e=38f,29e+19d,11c#2d,48c&37d,29c#20d,12c&1d,47c#38d,30c+20b,11a=3b,48a+38b,29a=21b,12a+2b,47a=39b,30a。

Comparing the seventeenth to twenty-fourth embodiments, it can be found that:

the spans of the second conductor and the third conductor differ by 2, and the spans of the sixth conductor and the seventh conductor differ by 2. When the span value of the second conductor is smaller than that of the third conductor, the span value of the sixth conductor is also smaller than that of the seventh conductor; conversely, when the span value of the second conductor is greater than the span value of the third conductor, the span value of the sixth conductor is also greater than the span value of the seventh conductor.

(twenty-fifth embodiment)

Next, referring to fig. 39 to 40, a winding method of a stator according to a twenty-fifth embodiment of the present application will be described. The twenty-fifth embodiment is a modification of the seventeenth embodiment, and the main difference between the present embodiment and the seventeenth embodiment is that the wire lead-out end of the present embodiment is located at the welding end of the stator, not at the crown end.

In order to facilitate the lead-out of the lead, the head and the tail of each branch are connected together at the crown end. Thus, the two I-shaped sub-conductors 22 at the end and end of each branch are replaced by one U-shaped sub-conductor 21 (also called eighth conductor or additional conductor).

In contrast to the seventeenth embodiment, in the present embodiment, the first branch connects the first conductor of the head part and the second conductor of the tail part using one U-shaped sub-conductor 21 with a span of 11, and the second branch connects the second conductor of the head part and the first conductor of the tail part using one U-shaped sub-conductor 21 with a span of 7.

(twenty-sixth embodiment)

Next, referring to fig. 41, a winding method of a stator according to a twenty-sixth embodiment of the present application will be described. The twenty-sixth embodiment is a modification of the seventeenth embodiment, and the main difference between the present embodiment and the seventeenth embodiment is that the arrangement positions of the fourth conductor and the I-shaped sub-conductor 22 are reversed in the present embodiment.

In contrast to the seventeenth embodiment, in each branch, the position where 2I-shaped sub-conductors 22 were originally provided is replaced by one U-shaped sub-conductor 21 (the two legs of the U-shaped sub-conductor 21 are located in the same layer); the location where the fourth conductor was originally provided is replaced by 2I-shaped sub-conductors 22.

(twenty-seventh to thirty-fourth embodiments)

First, referring to fig. 42 and 43, a winding manner of a stator according to a twenty-seventh embodiment of the present application is described. The twenty-seventh embodiment is a modification of the seventeenth embodiment, and the present embodiment differs from the seventeenth embodiment mainly in the number of layers. In this and the following embodiments, half of the number of layers L is an even number of not less than 2. The number of layers in this embodiment 2l=4, and half of the number of layers l=2.

For the case where half of the layers L are even numbers not less than 2, the number of U-shaped sub-conductors required to span the L-th layer and the l+1-th layer is only 2 in each branch. In contrast to the first to tenth embodiments, for the case where half of the number of layers L is an odd number of not less than 2, the number of U-shaped sub-conductors required to span the L-th layer and the l+1-th layer in each branch is 3× (pole pair number P-1).

The naming of the conductors at each position is followed in the seventeenth embodiment, and in this embodiment, the U-shaped sub-conductor 21 includes Q-2=4 first conductors, q=6 second conductors, Q-2=4 third conductors, 1 fourth conductor, 1 fifth conductor, and 1 seventh conductor in each branch, q=2 p×number of layers 2L/4=6.

The two legs G of the first conductor, the second conductor, the third conductor, the fifth conductor and the seventh conductor are inserted in two adjacent layers in the winding slot, and the two legs G of the fourth conductor are inserted in the same layer in the winding slot.

Each branch comprises a first queue and a second queue, and the fourth conductor is connected with the first queue and the second queue in series to form a branch queue.

The first queue includes a first conductor and a fifth conductor connected in series with each other.

In the case where the two leg portions G of the U-shaped sub-conductor 21 need to be provided in the L-th layer and the l+1-th layer, respectively, a fifth conductor is used; the first conductor is used in the case where the two leg portions G of the U-shaped sub-conductor 21 need to be provided in other adjacent layers than the L-th layer and the l+1-th layer, respectively.

The second queue includes a seventh conductor and second and third conductors spaced apart from each other in series.

In the case where the two leg portions G of the U-shaped sub-conductor 21 need to be provided at the L-th layer and the l+1-th layer, respectively, a seventh conductor is used; the second conductor and the third conductor are used in the case where the two leg portions G of the U-shaped sub-conductor 21 need to be provided in other adjacent layers than the L-th layer and the l+1-th layer, respectively.

Depending on the direction of the conductor run in the branch, which is shown in fig. 42 and 43, the following arrangement of the conductors is possible.

A first branch:

20a,29b-38a,47b-2a,11b*19c,28d-37c,46d-1c,

10d~20d,

11c=3d,48c+38d,29c=21d,12c+2d,47c=39d,30c&21b,12a=4b,49a+39b,30a=22b,13a+3b,48a=40b,31a。

a second branch:

22a,31b=39a,48b+4a,13b=21a,30b+40a,49b=3a,12b&21c,30d=38c,47d+3c,12d=20c,29d+39c,48d=2c,

11d~19d,

10c-1d,46c-37d,28c*20b,11a-2b,47a-38b,29a。

similarly, referring to fig. 44 to 50, the conductor arrangement modes in the twenty-eighth to thirty-fourth embodiments are obtained.

Twenty-eighth embodiment:

a first branch:

20a,29b-38a,47b-2a,11b*19c,28d-37c,46d-1c,

10d~21d,

12c=2d,47c+39d,30c=20d,11c+3d,48c=38d,29c&22b,13a=3b,48a+40b,31a=21b,12a+4b,49a=39b,30a。

a second branch:

21a,30b=40a,49b+3a,12b=22a,31b+39a,48b=4a,13b&20c,29d=39c,48d+2c,11d=21c,30d+38c,47d=3c,

12d~19d,

10c-1d,46c-37d,28c*20b,11a-2b,47a-38b,29a。

twenty-ninth embodiment:

a first branch:

20a,29b-39a,48b-2a,11b-21a,30b-38a,47b-3a,12b&19c,28d-38c,47d-1c,10d-20c,29d-37c,46d-2c,

11d~21d,

12c-3d,48c-39d,30c*22b,13a-4b,49a-40b,31a。

a second branch:

22a,31b-40a,49b-4a,13b*21c,30d-39c,48d-3c,

12d~20d,

11c-1d,46c-38d,29c-19d,10c-2d,47c-37d,28c&21b,12a-2b,47a-39b,30a-20b,11a-3b,48a-38b,29a。

thirty-first embodiment:

a first branch:

21a,30b-38a,47b-3a,12b-20a,29b-39a,48b-2a,11b&20c,29d-37c,46d-2c,11d-19c,28d-38c,47d-1c,

10d~21d,

12c-3d,48c-39d,30c*22b,13a-4b,49a-40b,31a。

a second branch:

22a,31b-40a,49b-4a,13b*21c,30d-39c,48d-3c,

12d~19d,

10c-2d,47c-37d,28c-20d,11c-1d,46c-38d,29c&20b,11a-3b,48a-38b,29a-21b,12a-2b,47a-39b,30a。

thirty-first embodiment:

a first branch:

19a,28b-37a,46b-1a,10b*20c,29d-38c,47d-2c,

11d~21d,

12c=4d,49c+39d,30c=22d,13c+3d,48c=40d,31c&20b,11a=3b,48a+38b,29a=21b,12a+2b,47a=39b,30a。

a second branch:

21a,30b=38a,47b+3a,12b=20a,29b+39a,48b=2a,11b&22c,31d=39c,48d+4c,13d=21c,30d+40c,49d=3c,

12d~20d,

11c-2d,47c-38d,29c*19b,10a-1b,46a-37b,28a。

thirty-second embodiment:

a first branch:

19a,28b-37a,46b-1a,10b*20c,29d-38c,47d-2c,

11d~22d,

13c=3d,48c+40d,31c=21d,12c+4d,49c=39d,30c&21b,12a=2b,47a+39b,30a=20b,11a+3b,48a=38b,29a。

a second branch:

20a,29b=39a,48b+2a,11b=21a,30b+38a,47b=3a,12b&21c,30d=40c,49d+3c,12d=22c,31d+39c,48d=4c,

13d~20d,

11c-2d,47c-38d,29c*19b,10a-1b,46a-37b,28a。

thirty-third embodiment:

a first branch:

19a,28b-38a,47b-1a,10b-20a,29b-37a,46b-2a,11b&20c,29d-39c,48d-2c,11d-21c,30d-38c,47d-3c,

12d~22d,

13c-4d,49c-40d,31c*21b,12a-3b,48a-39b,30a。

a second branch:

21a,30b-39a,48b-3a,12b*22c,31d-40c,49d-4c,

13d~21d,

12c-2d,47c-39d,30c-20d,11c-3d,48c-38d,29c&20b,11a-1b,46a-38b,29a-19b,10a-2b,47a-37b,28a。

thirty-fourth embodiment:

a first branch:

20a,29b-37a,46b-2a,11b-19a,28b-38a,47b-1a,10b&21c,30d-38c,47d-3c,12d-20c,29d-39c,48d-2c,

11d~22d,

13c-4d,49c-40d,31c*21b,12a-3b,48a-39b,30a。

a second branch:

21a,30b-39a,48b-3a,12b*22c,31d-40c,49d-4c,

13d~20d,

11c-3d,48c-38d,29c-21d,12c-2d,47c-39d,30c&19b,10a-2b,47a-37b,28a-20b,11a-1b,46a-38b,29a。

(thirty-fifth embodiment)

Referring to fig. 51 and 52, a winding manner of a stator according to a thirty-fifth embodiment of the present application will be described. The thirty-fifth embodiment is a modification of the twenty-seventh or thirty-first embodiment. The number of layers in this embodiment 2l=8, and half of the number of layers l=4.

In this embodiment, the U-shaped sub-conductor 21 includes Q-2=10 first conductors, q=12 second conductors, Q-2=10 third conductors, 1 fourth conductor, 1 fifth conductor, and 1 seventh conductor in each branch, q=2 p×the number of layers 2L/4=12.

The branch conductors are specifically arranged in the following manner,

a first branch:

19a,28b-37a,46b-1a,10b-19c,28d-37c,46d-1c,10d*20e,29f-38e,47f-2e,11f-20g,29h-38g,47h-2g,

11h~21h,

12g=4h,49g+39h,30g=22h,13g+3h,48g=40h,31g+21f,12e=4f,49e+39f,30e=22f,13e+3f,48e=40f,31e&20d,11c=3d,48c+38d,29c=21d,12c+2d,47c=39d,30c+20b,11a=3b,48a+38b,29a=21b,12a+2b,47a=39b,30a。

a second branch:

21a,30b=38a,47b+3a,12b=20a,29b+39a,48b=2a,11b+21c,30d=38c,47d+3c,12d=20c,29d+39c,48d=2c,11d&22e,31f=39e,48f+4e,13f=21e,30f+40e,49f=3e,12f+22g,31h=39g,48h+4g,13h=21g,30h+40g,49h=3g,

12h~20h,

11g-2h,47g-38h,29g-20f,11e-2f,47e-38f,29e*19d,10c-1d,46c-37d,28c-19b,10a-1b,46a-37b,28a。

the spans of the U-shaped sub-conductors in the twenty-seventh to thirty-fifth embodiments described above are summed up to give table 2.

TABLE 2 spans of different conductors in twenty-seventh through thirty-fifth embodiments

-a first conductor

=second conductor

+third conductor

Fourth conductor

* Fifth conductor

&Seventh conductor

Embodiment 27

K

K-1

K+1

K+1/K-1

K-1

K

Embodiment 28

K

K+1

K-1

K+2/K-2

K-1

K-2

Embodiment 29

K

K+1

K-1

K-1/K+1

K-1

K-2

Embodiment 30

K

K-1

K+1

K-2/K+2

K-1

K

Embodiment 31

K

K-1

K+1

K+1/K-1

K+1

K+2

Embodiment 32

K

K+1

K-1

K+2/K-2

K+1

K

Embodiment 33

K

K+1

K-1

K-1/K+1

K+1

K

Embodiment 34

K

K-1

K+1

K-2/K+2

K+1

K+2

Embodiment 35

K

K-1

K+1

K+1/K-1

K+1

K+2

It will be appreciated that the above-described embodiments and portions of aspects or features thereof may be suitably combined. For example, the wire terminals of the nineteenth to thirty-fifth embodiments may be provided at the solder terminals instead of the crown terminals. As another example, the fourth conductor and the I-shaped subconductor of each leg in the twenty-seventh through thirty-fifth embodiments may be reversed.

It should be understood that the specific arrangement of the branch conductors may also be adapted to follow the three arrangement rules mentioned above. For example, fig. 53 to 56 show another modification to the 29 th, 30 th, 33 th and 34 th embodiments.

The present invention has at least one of the following advantages:

(i) The spans of each welding pair are equal, or only two spans are adopted, so that the welding of the welding ends can be realized without the aid of a busbar, the outer diameter of the winding 20 at the welding end A2 is smaller, and the installation of other parts on the periphery of the stator is facilitated.

(ii) The U-shaped sub-conductors, except for the fourth conductor, all span both layers so that the winding 20 has a larger inner diameter at the ends, facilitating the installation of the rotor.

(iii) The wire outlet ends and the lead ends of the windings of the two branches of each phase are spaced little in the circumferential direction C, so that the structure is compact and simple, the branch windings are spatially symmetrical, and loop current is not generated.

(iv) The slots of each phase conductor are aligned in the circumferential direction for each pole, and the motor has a large torque. The odd layer and the even layer of the slot position of each phase conductor of each pole are staggered in the circumferential direction, or the L layer at the radial inner side and the L layer at the radial outer side of the slot position of each phase conductor of each pole are staggered in the circumferential direction, so that the harmonic wave influence and the noise can be reduced.

Of course, the present invention is not limited to the above-described embodiments, and various modifications may be made to the above-described embodiments of the present invention by those skilled in the art in light of the present teachings without departing from the scope of the present invention. For example:

(i) The lead-out terminal and the lead terminal in the above embodiment may be interchanged;

(ii) The above embodiments all place the wire-out end and the wire-out end at the radially outermost layer, however, this is not essential, and the wire-out end may be disposed at the radially innermost layer;

(iii) The slot number selected for each pole in the above embodiment can be translated in the circumferential direction C as a whole.

(iv) In the above embodiment, the two branches of each phase are connected in parallel, but this is not essential, and in other possible embodiments, the two branches of each phase may also be connected in series, for example by connecting the lead end of one branch with the lead end of the other branch in series, so that the windings of the phase as a whole form one series of windings.

Claims

1. A stator of a flat wire motor comprises a stator core (10) and a flat wire winding (20), and is characterized in that,

the number of winding grooves of each pole of the stator is 3, the number of poles of the stator is 2P which is an even number times 3, the number of layers formed in the winding grooves by the flat wire winding (20) is 2L, L is an integer not less than 2, the flat wire winding (20) comprises three-phase windings, the flat wire winding (20) of each phase comprises 2 branches, each branch comprises a plurality of U-shaped sub-conductors (21) which are connected in series with each other,

The two legs (G) of the U-shaped sub-conductor (21) are connected at one end to form a crown end (A1) and at the other end to form a welding end (A2) separately,

in each phase, the flat wire winding (20) fills up three consecutive winding slots per pole, two legs (G) of adjacent U-shaped sub-conductors (21) welded together form a welded pair, the span between the two legs (G) of all welded pairs is only two different,

the slots occupied by the flat wire windings (20) are located in L layers on the radial inner side, each pole occupies three continuous inner side wire winding slots, each pole occupies three continuous outer side wire winding slots in L layers on the radial outer side, the three inner side wire winding slots and the three outer side wire winding slots of each pole are staggered by one slot position in the circumferential direction,

the welding pairs include a first welding pair and a second welding pair,

the two legs (G) of the first welding pair are respectively positioned on the L layer and the L+1 layer, the span between the two legs (G) of the first welding pair is a first welding span,

the two legs (G) of the second welding pair being located in other adjacent layers than the L-th layer and the L+1-th layer, the span between the two legs (G) of the second welding pair being a second welding span,

L is an odd number not less than 2, in each of said branches, two legs of 3 x (P-1) U-shaped subconductors (21) are located in the L-th layer and the L+1-th layer, respectively, P is the pole pair number,

in each of said branches, said U-shaped sub-conductors (21) comprise Q-P first conductors, Q-P second conductors, Q-P third conductors, 1 fourth conductor, P-1 fifth conductor, P sixth conductors and P-2 seventh conductors, Q = 2P x number of layers 2L/4,

the two legs (G) of the first conductor, the second conductor, the third conductor, the fifth conductor, the sixth conductor and the seventh conductor are inserted in two adjacent layers in the winding slot, the two legs (G) of the fourth conductor are inserted in the same layer in the winding slot,

each of the branches includes a first queue and a second queue, the fourth conductor connects the first queue and the second queue in series to form a branch queue,

the first queue includes the first conductor and the fifth conductor in series with each other,

-using the fifth conductor in case both legs (G) of the U-shaped sub-conductor (21) need to be arranged in the L-th and l+1-th layers, respectively; in case the two legs (G) of the U-shaped sub-conductor (21) need to be arranged in other adjacent layers than the L-th layer and the L+1-th layer, respectively, the first conductor is used,

The second queue includes the second conductor and the third conductor in series with each other spaced apart, and the sixth conductor and the seventh conductor in series with each other spaced apart,

-using the sixth and seventh conductors in case two legs (G) of the U-shaped sub-conductor (21) need to be arranged in an L-th and l+1-th layer, respectively; in case both legs (G) of said U-shaped sub-conductor (21) need to be arranged in other adjacent layers than the L-th and L+1-th layers, respectively, said second and third conductors are used,

the first welding span is K+1, the second welding span is K, K=9,

the span of the first conductor is K, the span of the fifth conductor is K-1,

the span of the fourth conductor in one branch is K+1, and the span in the other branch is K-1; alternatively, the fourth conductor may have a span of K+2 in one branch, K-2 in the other branch,

the span of the second conductor is K-1, the span of the third conductor is K+1, the span of the seventh conductor is K, and in the case of a sixth conductor used in the queue, the span of the sixth conductor is K-2; or alternatively, the process may be performed,

2. A stator of a flat wire electric machine according to claim 1, characterized in that L is an even number not smaller than 2, in each of said branches there being two legs of 2U-shaped sub-conductors (21) located in the L-th and l+1-th layers respectively,

the wire outlet end and the wire lead end of each of said branches are placed in the radially outermost layer or the radially innermost layer, in each of said branches said U-shaped sub-conductors (21) comprises Q-2 first conductors, Q second conductors, Q-2 third conductors, 1 fourth conductor, 1 fifth conductor, and 1 seventh conductor, Q = number of poles 2P x number of layers 2L/4,

two legs (G) of the first conductor, the second conductor, the third conductor, the fifth conductor and the seventh conductor are inserted in two adjacent layers in the winding slot, two legs (G) of the fourth conductor are inserted in the same layer in the winding slot,

the second queue includes the seventh conductor and the second conductor and the third conductor in series spaced apart from each other,

-using the seventh conductor in case both legs (G) of the U-shaped sub-conductor (21) need to be arranged in the L-th and l+1-th layers, respectively; the second conductor and the third conductor are used in case the two legs (G) of the U-shaped sub-conductor (21) need to be arranged in other adjacent layers than the L-th layer and the l+1-th layer, respectively.

3. The stator of a flat wire motor according to claim 1 or 2, wherein the first welding span is K-1, the second welding span is K, k=9, and

the span of the first conductor is K, the span of the fifth conductor is K+1,

The span of the second conductor is K-1, the span of the third conductor is K+1, the span of the seventh conductor is K+2, and in the case of a sixth conductor used in the queue, the span of the sixth conductor is K; or alternatively, the process may be performed,

the second conductor has a span of k+1, the third conductor has a span of K-1, the seventh conductor has a span of K, and in the case of a sixth conductor used in the queue, the sixth conductor has a span of k+2.

4. Stator of a flat wire electric machine according to claim 1 or 2, characterized in that the flat wire winding (20) is led out at the crown end (A1) of the stator,

each branch of each phase further comprises 2I-shaped sub-conductors (22), the 2I-shaped sub-conductors (22) are respectively connected at the head and tail of the queue or the branch queue as wire outlet ends and wire lead ends,

the span between the I-shaped sub-conductor (22) and the adjacent leg (G) of the adjacent U-shaped sub-conductor (21) is K.

5. A stator of a flat wire electric machine according to claim 3, characterized in that the flat wire winding (20) is led out at the crown end (A1) of the stator,

6. The stator of a flat wire electric machine according to claim 4, characterized in that in each branch of each phase the 2I-shaped sub-conductors (22) are replaced by one U-shaped sub-conductor (21) and the fourth conductor is replaced by 2I-shaped sub-conductors (22).

7. Stator of a flat wire electric machine according to claim 1 or 2, characterized in that the flat wire winding (20) is led out at the welding end (A2) of the stator,

each branch of each phase further comprises 1 additional conductor connected in series with said first conductor at the head of the queue and with said third conductor at the tail of the queue, the span of said additional conductor being K +1 or K-2 in case the span of said fourth conductor is K +1 or K-1,

8. A stator of a flat wire electric machine according to claim 3, characterized in that the flat wire winding (20) is led out at the welding end (A2) of the stator,

9. The stator of a flat wire motor according to claim 1, wherein the lead ends of the two branches are connected in parallel, or the lead end of one of the two branches is connected in series with the lead end of the other branch, such that the two branches form one series winding.