Flat wire motor winding structure with copper wire inner cooling structure

Abstract

A flat wire motor winding structure with a copper wire inner cooling structure comprises an iron core, a plurality of armature grooves are formed in the iron core at intervals in the circumferential direction, insulation paper is arranged on the inner wall of any armature groove, and a plurality of copper wire combination structures arranged in the radial direction are arranged in any armature groove in a penetrating mode. Each copper wire combination structure comprises two copper wires which are arranged in parallel and fixedly connected, at least one groove is formed in the opposite side faces of the two copper wires in the extending direction of the copper wires, the grooves penetrate from the end faces of one ends of the copper wires to the end faces of the other ends of the copper wires, and the two grooves form a cooling channel. After the copper wire combination structure is subjected to wire insertion, connection and other processes, main heating parts in each layer of winding copper wires are provided with cooling channels, cooling liquid directly cools the copper wires through the cooling channels in the copper wires and makes full contact with the interior of the armature, direct contact cooling of the cooling liquid with main heating points of the armature and the copper wires is achieved, and the better cooling effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a flat wire motor, in particular to a flat wire motor winding structure with a copper wire inner cooling structure. Background Art

[0002] In the motor system of new energy vehicles, the motor will generate a lot of heat during operation, which will cause the motor power to drop, accelerate the aging of the insulation system, and increase the risk of motor burnout.

[0003] In the prior art, in the design of the cooling structure of the drive motor of a new energy vehicle, whether it is a water-cooled structure or an oil-cooled structure, the cooling structure is often cooled from the outside, through the coolant or the water channel or oil channel in the motor housing. Since the heating parts of the motor are mainly concentrated in the copper wire and the internal part of the armature winding, even for the most advanced oil-cooled motor with direct contact cooling, the cooling oil can only contact the armature core and the outside of the copper wire, and it is difficult to contact the part of the armature that heats the most seriously, resulting in poor cooling effect. Summary of the invention

[0004] The utility model aims to provide a flat wire motor winding structure with a copper wire inner cooling structure, which is intended to solve the technical problem that the cooling effect of the armature cooling system in the prior art is not good enough.

[0005] The utility model discloses a flat wire motor winding structure with a copper wire inner cooling structure, comprising an iron core, wherein a plurality of armature slots are arranged at intervals along a circumferential direction in the iron core, an insulating paper is arranged on the inner wall of any armature slot, a plurality of copper wire combination structures arranged in a radial direction are penetrated in any armature slot, and any copper wire combination structure respectively comprises two copper wires arranged in parallel and fixedly connected, at least one groove is arranged in the facing side surfaces of the two copper wires along the extension direction of the copper wire, the groove penetrates from one end face of the copper wire to the other end face of the copper wire, and the two grooves form a cooling channel.

[0006] Furthermore, an insulating layer is disposed on the outer side of any one of the copper wires.

[0007] Furthermore, the two copper wires are bonded by a self-adhesive coating, which is coated on the outside of the insulating layer. The self-adhesive coating is located in the groove and on four sides of the copper wire, or in the groove and on the side of the copper wire adjacent to the groove.

[0008] Furthermore, the cross-section of the cooling channel is circular, elliptical, diamond-shaped or rectangular.

[0009] Compared with the prior art, the effect of the utility model is positive and obvious. After the copper wire combination structure is plugged in and connected, the main heating parts in each layer of winding copper wire are provided with cooling channels. The coolant directly cools the copper wire through the cooling channel inside the copper wire, and fully contacts the inside of the armature, so that the coolant is in direct contact with the main heating points and copper wire of the armature, and has a better cooling effect. Compared with the complete large-section copper wire with inner holes, the utility model is easier to produce and has lower processing costs. There is an insulating layer between the two copper wires, which can effectively reduce the loss caused by the skin effect at high frequencies, and there is no need to process the cooling medium (an insulating layer is provided in the groove), solving the problem of medium conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of an embodiment of a circular cooling channel in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0011] Figure 2 It is a schematic diagram of an embodiment of a diamond-shaped cooling channel in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0012] Figure 3 It is a schematic diagram of an embodiment of a rectangular cooling channel in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0013] Figure 4 It is a schematic diagram of the copper wire combination structure in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0014] Figure 5 It is a schematic diagram of an embodiment of the copper wire, the insulating layer and the self-adhesive coating in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0015] Figure 6 It is a schematic diagram of another embodiment of the copper wire, the insulating layer and the self-adhesive coating in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0016] Figure 7 It is a schematic diagram of a semicircular groove in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0017] Figure 8 It is a schematic diagram of a semi-rectangular groove in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model.

[0018] Fig. 9 It is a schematic diagram of a semi-elliptical groove in a flat wire motor winding structure with a copper wire inner cooling structure of the utility model. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with an embodiment, but the present invention is not limited to the embodiment. Any similar structure and similar changes of the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and is not a limitation on the technical solution of the present invention.

[0020] like Figure 1-Figure 9 As shown, a flat wire motor winding structure with a copper wire inner cooling structure of the utility model comprises an iron core, in which a plurality of armature slots 11 are arranged at intervals along the circumferential direction, an insulating paper 10 is arranged on the inner wall of any armature slot 11, and a plurality of radially arranged copper wire combination structures 9 are penetrated in any armature slot 11, and any copper wire combination structure 9 comprises two copper wires 1 arranged in parallel and fixedly connected, and at least one groove 2 is arranged in the facing sides of the two copper wires 1 along the extension direction of the copper wire 1, and the groove 2 penetrates from one end face of the copper wire 1 to the other end face of the copper wire 1, and the two grooves 2 form a cooling channel 8.

[0021] Furthermore, an insulating layer 6 is disposed on the outer side of any of the copper wires 1 .

[0022] Furthermore, the two copper wires 1 are bonded by a self-adhesive coating 7, which is coated on the outside of the insulating layer 6. The self-adhesive coating 7 is located in the groove 2 and on the four sides of the copper wire 1 (such as Figure 5 ), or located in the groove 2 and on the side of the copper wire 1 adjacent to the groove 2 (as shown Figure 6 as shown).

[0023] Furthermore, the cross section of the cooling channel 8 is circular, elliptical, diamond-shaped or rectangular.

[0024] Specifically, the iron core, armature slot 11, insulating paper 10, copper wire 1, insulating layer 6, self-adhesive coating 7, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0025] The working principle of this embodiment:

[0026] 1. When manufacturing electromagnetic wire, the copper rod is formed by calendering and wire drawing, and the copper wire 1 is manufactured into a bare copper wire with a groove 2 (which can be semicircular, semi-rectangular, semi-rhombus, semi-elliptical, etc.) on one surface. When painting the bare copper wire, the outermost layer of the paint layer on the surface of the copper wire 1 is coated with a self-adhesive coating 7 (it can be coated on the large surface with the groove 2, or on all four surfaces). Then, the sides of the two copper wires 1 with the groove 2 are arranged facing each other, pressed, and cured to form a copper wire combination structure 9 with a cooling channel 8. For the copper wire 1 with a cooling channel 8 formed by merging two copper wires 1, the two copper wires 1 are inserted into the armature slot 11 as a bus, and the wires are inserted in the traditional hairpin winding form to form a complete winding.

[0027] 2. Better cooling effect

[0028] After the copper wire combination structure 9 is plugged in and connected, the main heat-generating parts of each layer of winding copper wire 1 are provided with cooling channels 8. The coolant directly cools the copper wire 1 through the cooling channels 8 inside the copper wire 1 and is in full contact with the inside of the armature, thereby achieving direct contact cooling between the coolant and the main heat-generating points of the armature and the copper wire 1, and having a more excellent cooling effect.

[0029] 3. It has the characteristics of reducing linear types

[0030] Since two small U-shaped wires are combined into a total U-shaped wire as the winding component unit for plugging, the copper wire type is reduced by 1 (for example: the mainstream 8-layer flat wire of new energy drive motors only requires at least 2 types of U-shaped wires, and the number of wire forming is reduced by 50%), effectively reducing the time required for U-shaped wire related design and process debugging, reducing debugging costs and equipment investment, and making the production line layout more compact, which is suitable for mass production of products.

[0031] 4. Compared with the complete large-section copper wire 1 with inner hole, the utility model is easier to produce and has lower processing cost. There is an insulating layer 6 between the two copper wires 1, which can effectively reduce the loss caused by the skin effect under high frequency, and there is no need to process the cooling medium (the insulating layer 6 is provided in the groove 2), thereby solving the problem of medium conductivity.

Claims

1. A flat wire motor winding structure with a copper wire inner cooling structure, comprising an iron core, characterized in that: The iron core is provided with a plurality of armature slots at intervals along the circumferential direction, an insulating paper is provided on the inner wall of any armature slot, and a plurality of copper wire combination structures arranged radially are penetrated in any armature slot, and any copper wire combination structure comprises two copper wires arranged in parallel and fixedly connected, and at least one groove is provided in the facing sides of the two copper wires along the extension direction of the copper wire, and the groove runs through from one end face of the copper wire to the other end face of the copper wire, and the two grooves form a cooling channel.

2. The flat wire motor winding structure with copper wire inner cooling structure according to claim 1, characterized in that: An insulating layer is arranged on the outer side of any one of the copper wires.

3. The flat wire motor winding structure with copper wire inner cooling structure according to claim 2, characterized in that: The two copper wires are bonded by a self-adhesive coating, which is coated on the outside of the insulating layer. The self-adhesive coating is located in the groove and on four sides of the copper wire, or in the groove and on the side of the copper wire adjacent to the groove.

4. The flat wire motor winding structure with copper wire inner cooling structure according to claim 1, characterized in that: The cross section of the cooling channel is circular, elliptical, diamond-shaped or rectangular.

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