Flat wire motor stator for new energy automobile

Abstract

The utility model relates to a flat wire motor stator for a new energy automobile, the motor stator is provided with a stator groove, N layers of flat wires are inserted in the stator groove, first gaps are arranged among the N layers of flat wires, and second gaps are arranged between the flat wires and the stator groove; auxiliary holes are formed in the inner walls of the stator grooves, and the side faces of the auxiliary holes communicate with the interiors of the stator grooves. Compared with the prior art, by arranging the auxiliary holes communicated with the stator grooves in the stator grooves, insulating impregnating varnish can further flow in the stator grooves effectively, filling is more sufficient, the varnish dripping amount is increased, the motor flat wire impregnating effect is improved, the stator mode and the magnetic circuit are optimized, the motor NVH performance is improved, and the service life of the motor is prolonged. And the alternating current effect is inhibited, and the motor efficiency is improved.

Description

Technical Field

[0001] This utility model relates to new energy vehicles, and in particular to a flat wire motor stator for new energy vehicles. Background Technology

[0002] Flat wire motors consist of a stator and a rotor. The stator has stator slots for winding flat wire. Currently, most flat wire motor stator slots are rectangular straight slots. However, with rectangular straight slots, the varnish impregnation effect of the flat wire is often unsatisfactory.

[0003] A search revealed CN114243959A, which discloses a stator assembly, a motor, and a robot. Specifically, it discloses a stator core comprising multiple stator teeth, with stator slots formed between any two adjacent stator teeth. The stator teeth can also be formed with multiple recesses to receive wires. However, this prior art applies to hexagonal wires, and while modifications are made to accommodate the shape of the hexagonal wires, it does not solve the problem of unsatisfactory varnishing effect on flat wires in motors.

[0004] In summary, the technical problem that needs to be solved is how to design a stator that can improve the varnishing effect of the flat wires in a motor. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, namely the poor impregnation effect of flat wire, and to provide a flat wire motor stator for new energy vehicles.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a flat wire motor stator for new energy vehicles is provided. The motor stator is provided with a stator slot, in which multiple layers of flat wires are inserted. There is a first gap between two adjacent layers of flat wires and a second gap between the flat wires and the stator slot. An auxiliary hole is provided on the inner wall of the stator slot, and the side of the auxiliary hole communicates with the inside of the stator slot.

[0008] As a preferred technical solution, the extension direction of the auxiliary hole is parallel to the extension direction of the flat wire inside the stator slot.

[0009] As a preferred technical solution, the auxiliary hole completely penetrates the stator slot in the extending direction.

[0010] As a preferred technical solution, the stator slot has two opposing first sides, a second side, and a third side. The second side and the third side are opposite to each other. The third side is connected to the inner ring of the stator through the stator slot opening. The auxiliary hole is formed on the first side.

[0011] As a preferred technical solution, there are multiple auxiliary holes, and the multiple auxiliary holes are arranged at equal intervals.

[0012] As a preferred technical solution, the auxiliary hole is opened in the middle of the second side surface.

[0013] As a preferred technical solution, the auxiliary hole is opened at the position where the first gap intersects with the inner wall of the stator slot.

[0014] As a preferred technical solution, the side of the auxiliary hole intersects the inner wall of the stator slot at two straight lines, and the distance between the two straight lines is greater than or equal to the width of the first gap.

[0015] As a preferred technical solution, the stator slot has four first sides, the extension direction of the first sides is parallel to the extension direction of the flat wire, and the auxiliary hole is opened on at least one of the first sides.

[0016] As a preferred technical solution, the cross-sectional shape of the auxiliary hole is circular, rectangular, or triangular.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) By opening auxiliary holes in the stator slots that communicate with the stator slots, the insulating impregnation varnish can effectively flow further in the stator slots, filling them more fully, increasing the amount of varnish dripping, improving the impregnation effect of the motor flat wires, optimizing the stator mode and magnetic circuit, improving the motor NVH performance, suppressing AC effects, and improving motor efficiency.

[0019] 2) The auxiliary holes of this utility model completely penetrate the stator slot in the extension direction. Multiple auxiliary holes can be set to increase the amount of paint dripping. The auxiliary holes are equidistantly arranged in the middle of the second side of the stator slot, which can make the paint dripping more uniform. The stator slot opening is close to the motor air gap. Setting auxiliary holes near the slot opening can suppress the AC effect of the flat wire motor and improve the motor efficiency. Different shapes of auxiliary holes can optimize the motor's natural frequency and achieve specific effects on NVH optimization. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first structure of a flat wire motor stator for new energy vehicles according to this utility model;

[0021] Figure 2 This is a schematic diagram of the second structure of a flat wire motor stator for new energy vehicles according to this utility model;

[0022] Figure 3 This is a schematic diagram of the third structure of a flat wire motor stator for new energy vehicles according to this utility model;

[0023] Figure 4This is a schematic diagram of the fourth structure of a flat wire motor stator for new energy vehicles according to this utility model;

[0024] Figure 5 This is a schematic diagram of the fifth structure of a flat wire motor stator for new energy vehicles according to this utility model;

[0025] Figure 6 This is a schematic diagram of the sixth structure of a flat wire motor stator for new energy vehicles according to this utility model;

[0026] The numbers in the diagram are as follows:

[0027] 1. Stator slot, 2. Auxiliary hole, 3. Flat wire, 4. Stator tooth. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0029] like Figure 1 As shown, this utility model provides a flat wire motor stator for new energy vehicles. The motor stator is provided with stator teeth 4, and there is a stator slot 1 between two stator teeth 4. N layers of flat wires 3 are inserted in the stator slot 1. There is a first gap between the N layers of flat wires 3 and a second gap between the flat wires 3 and the stator slot 1.

[0030] An auxiliary hole 2 is provided on the inner wall of the stator slot 1, and the side of the auxiliary hole 2 communicates with the interior of the stator slot 1. There is at least one auxiliary hole 2, and multiple auxiliary holes 2 can be arranged at equal intervals. The extension direction of the auxiliary hole 2 is parallel to the extension direction of the flat wire 3, and it completely penetrates the stator slot 1 in the extension direction. For motors with large outer diameters, the stator slot 1 is relatively deep, and the size of the auxiliary hole 2 can be changed according to the specific motor size to achieve better optimization of the impregnation effect. By increasing the number of auxiliary holes 2, better optimization and better dripping effect can be achieved.

[0031] The stator slot 1 includes four sides, arranged in pairs opposite each other. One side has a stator slot 1 opening, which connects to the inner ring of the stator. Auxiliary holes 2 are located on the two sides adjacent to the stator slot 1 opening, at the intersection of the first gap and the side of the stator slot 1 opening. For different numbers of layers in the flat wire 3 winding, the auxiliary holes 2 on the stator slot 1 can be specifically optimized and analyzed. Appropriate auxiliary holes 2 in the stator slot 1 can maximize their effect. The auxiliary holes 2 are designed to be located between two layers of flat wire 3, allowing the insulating impregnating varnish to directly enter the layers of the flat wire 3, resulting in a more significant improvement in the dripping effect. The auxiliary holes 2 can also be located on the intersection line of two adjacent sides, such as... Figure 2 As shown. The auxiliary hole 2 can also be located in the middle of the side opposite to the side where the stator slot 1 is located, such as... Figure 3 As shown. The auxiliary hole 2 can be formed individually on the side of the stator slot 1 or on the intersection line of adjacent sides, or it can be formed on both the side and the intersection line, as shown. Figure 4 As shown. The opening positions can be flexibly combined. The position of the motor stator slot 1 opening is close to the motor air gap. An auxiliary hole 2 is set near the slot opening, which has the function of optimizing the paint dripping effect, and at the same time can suppress the AC effect of the flat wire 3 motor, thereby improving the motor efficiency.

[0032] The auxiliary hole 2, which is opened on the side of the stator slot 1, intersects the inner wall of the stator slot 1 with two straight lines. The distance between the two straight lines is greater than or equal to the width of the first gap, which facilitates the flow of insulating impregnation varnish.

[0033] like Figure 5 and Figure 6 As shown, the cross-sectional shape of the auxiliary hole 2 is circular, rectangular, or triangular. By designing auxiliary holes 2 of different sizes, while optimizing the paint dripping effect, it can also optimize the stator modes and change the stator natural frequency. Through different shape designs of the auxiliary holes 2, optimizing the motor's natural frequency can achieve specific effects for NVH optimization.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A flat wire motor stator for a new energy vehicle, characterized in that, The motor stator is provided with a stator slot (1), a plurality of layers of flat wires (3) are inserted in the stator slot (1), a first gap is formed between two adjacent layers of flat wires (3), and a second gap is formed between the flat wire (3) and the stator slot (1); an auxiliary hole (2) is formed in the inner wall of the stator slot (1), and the side surface of the auxiliary hole (2) is in communication with the inside of the stator slot (1).

2. The flat wire motor stator for new energy vehicles according to claim 1, characterized in that, The extension direction of the auxiliary hole (2) is parallel to the extension direction of the flat wire (3) in the stator slot.

3. The flat wire motor stator for new energy vehicles according to claim 2, characterized in that, The auxiliary hole (2) completely penetrates the stator slot (1) in the extension direction.

4. The flat wire motor stator for new energy vehicles according to claim 1, characterized in that, The stator slot (1) has two opposite first side surfaces, a second side surface and a third side surface, the second side surface is opposite to the third side surface, the third side surface is in communication with the inner ring of the stator through a stator slot opening, and the auxiliary hole (2) is formed on the first side surface.

5. The flat wire motor stator for new energy vehicles according to claim 4, characterized in that, The auxiliary hole (2) is a plurality of auxiliary holes, and the plurality of auxiliary holes (2) are equidistantly arranged.

6. The flat wire motor stator for new energy vehicles according to claim 4, characterized in that, The auxiliary hole (2) is formed in the middle of the second side surface.

7. The flat wire motor stator for new energy vehicles according to claim 1, characterized in that, The auxiliary hole (2) is formed at the position where the first gap and the inner wall of the stator slot (1) intersect.

8. The flat wire motor stator for new energy vehicles according to claim 7, characterized in that, The side surface of the auxiliary hole (2) intersects with the inner wall of the stator slot (1) at two straight lines, and the distance between the two straight lines is greater than or equal to the width of the first gap.

9. The flat wire motor stator for new energy vehicles according to claim 1, characterized in that, The stator slot (1) has four first side edges, the extension direction of the first side edge is parallel to the extension direction of the flat wire (3), and the auxiliary hole (2) is formed on at least one first side edge.

10. The flat wire motor stator for new energy vehicles according to claim 1, characterized in that, The shape of the cross section of the auxiliary hole (2) is circular, rectangular or triangular.

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