CN113555990A

CN113555990A - Stator winding coil, stator winding, stator, motor and vehicle

Info

Publication number: CN113555990A
Application number: CN202010338902.1A
Authority: CN
Inventors: 何明杰; 李伟业; 彭俊; 符敏利; 王禹; 韦强; 侯聚微; 杨慧强; 郝玉涛
Original assignee: CRRC Zhuzhou Institute Co Ltd
Current assignee: CRRC Zhuzhou Institute Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-10-26

Abstract

The invention discloses a stator winding coil, a stator winding, a stator, a motor and a vehicle, belongs to the technical field of motors and is used for solving the technical problem that the welding space of a winding in the conventional motor is insufficient. The invention has the advantages of large welding operation space, high welding efficiency and the like.

Description

Stator winding coil, stator winding, stator, motor and vehicle

Technical Field

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

Background

At present, a motor manufactured by a flat wire conductor process is commonly used in a new energy automobile, and the motor is also called as a motor with a hairpin winding, so that the torque, the efficiency and the like of the motor are improved. In order to form a winding structure with three-phase symmetry, a motor adopting a hairpin winding generally needs to adopt the processes of flat wire conductor forming, wire inserting, wire twisting side welding and the like. When the wire twisting operation is performed, the ends of the flat wire conductors to be welded are twisted in pairs into radial pairs, that is, the welding surface between two flat wire conductors in the same group is perpendicular to the radial direction of the stator core. However, when the number of the flat wire conductors in the stator slot is large, for example, four, six, eight or even more layers, the ends of the flat wire conductors in different groups are arranged relatively closely in the radial direction, and the radial gap is relatively small, so that it is inconvenient to perform a welding operation in a limited radial space, which increases the difficulty of the welding process and reduces the welding efficiency.

The analysis is performed by taking as an example a hairpin winding having six layers of flat wire conductors, which are defined as a first layer 19, a second layer 20, a third layer 21, a fourth layer 22, a fifth layer 23, and a sixth layer 24 in this order from the inside to the outside in the radial direction of the stator core 2, as shown in fig. 1.

A conventional hairpin-type winding motor stator having six layers of flat wire conductors is shown in fig. 2, and is composed of a hairpin-type winding 1 and a stator core 2; the hairpin winding 1 is formed by connecting a plurality of coils (or flat wire conductors) in a certain way. The welded end connections of the flat wire conductors of the hairpin winding 1 are shown in fig. 3. The end of the bond end of the rectangular wire conductor is comprised of a first vertical portion 7 and a second angled portion 8, as shown in fig. 4, wherein the first vertical portion 7 has a width and thickness of L1 and L2, respectively, and as shown in fig. 4, the first conductor set 3, second conductor set 4, and third conductor set 5 have dimensions L1 and 2L 2, respectively, in the circumferential direction 18 and the radial direction 17. The first vertical parts 7 at the ends of the plurality of flat wire conductors are connected by welding two by two to form a first conductor group 3, a second conductor group 4 and a third conductor group 5. The first conductor group 3 is formed by first-layer and second-layer flat wire conductors, the second conductor group 4 is formed by third-layer and fourth-layer flat wire conductors, the third conductor group 5 is formed by fifth-layer and sixth-layer flat wire conductors, and the first conductor group 3, the second conductor group 4 and the third conductor group 5 are sequentially arranged along the radial direction. The first vertical parts 7 of the ends of two flat wire conductors belonging to the same conductor group are in a diametrically opposite position, so that a first soldering surface 6 is formed, which is perpendicular to the radial direction. The first conductor group 3, the second conductor group 4 and the third conductor group 5 are sequentially arranged along the radial direction, and the gaps between the adjacent conductor groups are relatively small, so that the welding operation is inconvenient to carry out, and the welding efficiency is influenced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a stator winding coil, a stator winding, a stator, a motor and a vehicle, wherein the stator winding coil is simple in structure and large in welding operation space so as to improve the welding efficiency.

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

the utility model provides a stator winding coil, includes the coil body, the one end of coil body is provided with the welding end, the welding end includes second vertical portion and second slope portion, the one end of second slope portion with the coil body links to each other, the other end with the second vertical portion links to each other, the width direction of second vertical portion with be certain angle between the width direction of coil body.

As a further improvement of the above technical solution:

the angle is 45-135 degrees.

The second inclined portion is twisted so that a certain angle is formed between the width direction of the second vertical portion and the width direction of the coil body.

The coil body is U-shaped.

The invention also discloses a stator winding which comprises a plurality of groups of conductor groups, and the coils in the conductor groups are the stator winding coils.

As a further improvement of the above technical solution:

second welding surfaces formed between the coils in each conductor group are parallel to the radial direction of the stator core.

The number of the conductor sets is 2-8.

The invention further discloses a stator which comprises a stator core and the stator winding, wherein the stator core is provided with a plurality of core slots in the circumferential direction, and coils in the stator winding are arranged in the core slots.

The invention also discloses a motor which comprises the stator.

The invention further discloses a vehicle comprising an electric machine as described above.

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

according to the stator winding coil, the stator winding, the stator, the motor and the vehicle, a certain angle (such as 90 degrees) is formed between the second vertical part of the welding end of the coil and the coil body, and the radial gap between the welding ends of different conductor groups can be increased to a certain extent, so that the welding operation is facilitated, and the welding efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of the arrangement of windings in a core slot in the prior art.

Fig. 2 is a schematic structural diagram of a stator in the prior art.

Fig. 3 is a schematic view of a connection structure of a welding terminal in the prior art.

Fig. 4 is a schematic view of a prior art solder terminal.

FIG. 5 is a schematic view of a connection structure of the welding terminals of the present invention.

FIG. 6 is a schematic view of a solder terminal according to the present invention.

Illustration of the drawings: 1. a winding; 2. a stator core; 3. a first conductor set; 4. a second conductor set; 5. a third conductor set; 6. a first welding surface; 7. a first vertical portion; 8. a first inclined portion; 9. a second vertical portion; 10. a second inclined portion; 11. an outer conductor set; 12. a middle conductor set; 13. an inner conductor set; 14. a second weld face; 15. welding the end; 16. a coil body; 17. a radial direction; 18. a circumferential direction; 19. a first layer; 20. a second layer; 21. a third layer; 22. a fourth layer; 23. a fifth layer; 24. and a sixth layer.

Detailed Description

The invention is further described below with reference to the figures and the specific embodiments of the description.

As shown in fig. 6, the stator winding coil of the present embodiment includes a coil body 16, one end of the coil body 16 is provided with a welding terminal 15 for welding with another coil of the same group of conductors extending out of a core slot of the stator core 2, wherein the welding end 15 comprises a second vertical portion 9 and a second inclined portion 10, one end of the second inclined portion 10 is connected with the coil body 16, the other end is connected with the second vertical portion 9, the width direction of the second vertical portion 9 is different from the width direction of the coil body 16 (the coil body 16 is arranged in the core slot, wherein the width direction of the coil body 16 is the width direction of the core slot, the thickness direction of the coil body 16 is the depth direction of the core slot) by a certain angle, preferably 90 degrees, i.e. the direction of the coil body L1 differs by 90 degrees from the direction of the second vertical portion L1 as in fig. 6, wherein L2 denotes the thickness. Of course, the angle difference is not limited to 90 degrees, and may be selected according to actual conditions, such as 45 to 135 degrees. Specifically, the second inclined portion 10 is twisted to make the difference between the width direction of the second vertical portion 9 and the width direction of the coil body 16 by 90 degrees, but of course, in other embodiments, the angular difference between the coil body 16 and the second vertical portion 9 may be realized by other processes.

In the present embodiment, the coil body 16 is U-shaped, and the second inclined portions 10 at both ends of the coil body 16 are inclined along both sides of the coil body 16 so that the second inclined portions 10 are flared, as shown in fig. 6. Of course, in other embodiments, the coil body 16 may have a V-shape or other shape, and the second inclined portion 10 may also be inclined in the same direction, such as along the left or right side of the coil body 16.

As shown in fig. 5, the present invention further discloses a hairpin type stator winding having radial welding surfaces, which includes a plurality of conductor sets, wherein the coils in each conductor set are the stator winding coils, and the second welding surfaces 14 formed between the coils in each conductor set are parallel to the radial direction 17 of the stator core. Specifically, the hairpin winding 1 is composed of a plurality of stator winding coils (or flat wire conductors) as described above, i.e., the weld end 15 of the coils is composed of the second vertical portion 9 and the second inclined portion 10, as shown in fig. 6. The second inclined part 10 and the second vertical part 9 of the coil are twisted to a certain degree, so that the second vertical part 9 and the vertical part of the coil body 16 extending out of the iron core groove are 90 degrees different from each other. As shown in fig. 5, the number of conductor sets is three, and after the second vertical portions 9 of the coil are connected by two-by-two soldering, an outer conductor set 11, a middle conductor set 12, and an inner conductor set 13 are formed. The first layer and the second layer of flat wire conductors form an outer conductor group 11, the third layer and the fourth layer of flat wire conductors form a middle conductor group 12, and the fifth layer and the sixth layer of flat wire conductors form an inner conductor group 13. The surfaces of the two flat wire conductors belonging to the same conductor group, at which the second vertical portions 9 contact each other, form a second weld surface 14, and the second weld surface 14 is parallel to the radial direction 17 of the stator core 2. The dimensions of outer conductor set 11, middle conductor set 12 and inner conductor set 13 in circumferential direction 18 and radial direction 17 are 2 × L2 and L1, respectively. Because the difference between the second vertical part 9 of the flat wire conductor and the vertical part extending from the inside of the slot is 90 degrees, when 2 x L2 is greater than L1, the gaps among the outer conductor group 11, the middle conductor group 12 and the inner conductor group 13 of the hairpin winding formed by the flat wire conductor in the radial direction 17 can be increased, so that the welding is facilitated, and the welding efficiency is further improved.

In this embodiment, the number of conductor sets is three. In other embodiments, one, two, four or more sets may be selected, i.e. windings suitable for two, four, eight or more layers of coils. Of course, the present invention is not limited to the hairpin winding 1, and is also applicable to other windings 1 to which such a connection of the weld terminals 15 is applicable.

The invention also discloses a stator, which comprises the stator core 2 and the stator winding 1, wherein the stator core 2 is provided with a plurality of core slots in the circumferential direction, and each conductor group in the stator winding 1 is arranged in the core slot. The stator of the invention comprises a stator winding 1 as described above, with the same advantages as described above for the stator winding 1.

The invention further discloses an electric machine comprising a stator as described above. The motor of the invention also comprises the stator winding 1, has the advantages of the stator winding 1, and has simple integral structure, small volume and high working stability.

The invention further discloses a vehicle comprising an electric machine as described above. The vehicle of the invention also comprises a stator winding 1 as described above, also with the advantages as described above for the stator winding 1.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.

Claims

1. The utility model provides a stator winding coil, includes coil body (16), the one end of coil body (16) is provided with weld end (15), weld end (15) include second vertical portion (9) and second slope portion (10), the one end of second slope portion (10) with coil body (16) link to each other, the other end with second vertical portion (9) link to each other, its characterized in that, the width direction of second vertical portion (9) with be certain angle between the width direction of coil body (16).

2. The stator winding coil of claim 1, wherein the angle is 45-135 degrees.

3. A stator winding coil according to claim 1 or 2, characterized in that the second inclined portion (10) is twisted so that the width direction of the second vertical portion (9) is at an angle to the width direction of the coil body (16).

4. Stator winding coil according to claim 1 or 2, characterized in that the coil body (16) is U-shaped.

5. A stator winding comprising a plurality of conductor sets, wherein the coils in each conductor set are stator winding coils as claimed in any one of claims 1 to 4.

6. A stator winding according to claim 5, characterized in that the second weld plane (14) formed between the coils in each of the conductor sets is parallel to the radial direction (17) of the stator core (2).

7. A stator winding according to claim 5 or 6, wherein the number of conductor sets is 2-8 sets.

8. A stator, characterized by comprising a stator core (2) and a stator winding (1) according to any one of claims 5 to 7, the stator core (2) being provided with a plurality of core slots in a circumferential direction, coils in the stator winding (1) being arranged in the core slots.

9. An electrical machine comprising a stator according to claim 8.

10. A vehicle characterized by comprising an electric machine according to claim 9.