Insulation paper structure

Abstract

The utility model provides an insulation paper structure which can save refrigerants and prevent dielectric strength between multiple layers of coils from being reduced. The insulation paper structure is suitable for a cylindrical stator core, the inner periphery of the stator core is provided with a plurality of grooves, and a coil is wound in the plurality of grooves. The insulation paper structure comprises cylindrical insulation paper, the insulation paper insulates a plurality of coil ends of the coil on at least one side of the stator core in the axial direction, the insulation paper is provided with a refrigerant hole, and the refrigerant hole is closer to the edge of the insulation paper than the center of the insulation paper. The refrigerant hole is used for allowing a refrigerant to pass through, the insulating paper is inserted among the end parts of the plurality of coils, so that the refrigerant hole is closer to the stator iron core than the central part of the insulating paper, and the refrigerant hole is not overlapped with the coils in the radial direction of the stator iron core.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of insulation paper structures, and a kind of insulation paper structure suitable for stator core. BACKGROUND

[0002] In recent years, in order to realize the effort of low-carbon society or decarbonization society, in the vehicle, also reduce the emission of CO2 or improve energy efficiency, and research and development related to electric vehicles are being carried out. In the rotating electrical machine of electric vehicle, the insulation paper can be used to insulate between the multiple layers of coils wound on the stator core. However, in the case where the insulation paper is provided, the cooling oil used to cool the rotating electrical machine is difficult to flow smoothly throughout the coil due to the obstruction of the insulation paper, which is not conducive to the heat dissipation performance of the rotating electrical machine, and a large amount of coolant must be used to improve heat dissipation. Therefore, it is necessary to improve the insulation paper to overcome the above problems. SUMMARY

[0003] The utility model relates to a kind of insulation paper structure, can save coolant and prevent the dielectric strength between multiple layers of coils.

[0004] According to the embodiment of the utility model, the insulation paper structure is suitable for the cylindrical stator core, the inner periphery of the stator core has a plurality of grooves, and the coil is wound in the plurality of grooves. The insulation paper structure comprises: a cylindrical insulation paper, which insulates between a plurality of coil end portions of the coil on at least one side of the stator core in the axial direction, the insulation paper has a coolant hole, the coolant hole is closer to the edge of the insulation paper than the central part of the insulation paper, the coolant hole is used to pass the coolant, the insulation paper is inserted between the plurality of coil end portions so that the coolant hole is closer to the stator core than the central part of the insulation paper, and the coolant hole does not overlap the coil in the radial direction of the stator core.

[0005] In the embodiment according to the utility model, the insulation paper structure comprises a plurality of insulation papers, and the coolant hole of any insulation paper between the coil end portions is staggered with the coolant hole of another adjacent insulation paper between the coil end portions.

[0006] In the embodiment according to the utility model, the insulation paper further has a positioning portion, the insulation paper has a plurality of coolant holes, and the positioning portion is located between two coolant holes adjacent to each other in the plurality of coolant holes.

[0007] Based on the above, in the insulating paper structure of this invention, the insulating paper has refrigerant holes for refrigerant to pass through. Therefore, the refrigerant can flow smoothly throughout the entire coil without requiring excessive refrigerant. Furthermore, the refrigerant holes are arranged so as not to overlap with the coil. Therefore, the presence of the refrigerant holes will not damage the insulation between adjacent multi-layer coils. Thus, the insulating paper structure of this invention can save refrigerant and prevent a decrease in dielectric strength between multi-layer coils. Attached Figure Description

[0008] Figure 1 This is a perspective view of the stator core and insulating paper structure according to an embodiment of the present invention;

[0009] Figure 2 yes Figure 1 An exploded view of the stator core and insulating paper structure;

[0010] Figure 3 yes Figure 1 A partial top view of the stator core and insulating paper;

[0011] Figure 4 yes Figure 1 A partial 3D view of the stator core and insulating paper;

[0012] Figure 5 yes Figure 1 A partial front view schematic diagram of the stator core and insulating paper;

[0013] Figure 6 and Figure 7 They are Figure 1 A schematic diagram showing the stator core and insulating paper at different radial positions when viewed radially.

[0014] Figure 8 and Figure 9 They are Figure 1 A schematic diagram of insulating paper at different radial positions.

[0015] Explanation of icon numbers

[0016] 50: Stator core;

[0017] 50a: First side;

[0018] 50b: Second side;

[0019] 52: slot;

[0020] 54: Coil;

[0021] 54a: Conductor;

[0022] 54b: Coating;

[0023] 54c: Welded section;

[0024] 541: Coil end;

[0025] 60: Refrigerant pipe;

[0026] 62: Supply path;

[0027] 100: Insulating paper structure;

[0028] 110, 110A, 110B: Insulating paper;

[0029] 110a: Refrigerant port;

[0030] 112: Positioning unit;

[0031] A: Axial direction;

[0032] C: Zhou Xiang;

[0033] E: Edge;

[0034] M: Center line;

[0035] R: Radial;

[0036] X, Y, Z: Axial axes. Detailed Implementation

[0037] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same component reference numerals are used in the drawings and description to denote the same or similar parts.

[0038] Figure 1 This is a perspective view of the stator core and insulating paper structure according to an embodiment of the present invention, showing the axial directions X, Y, and Z. Figure 2 yes Figure 1 An exploded view of the stator core and insulating paper structure. Please refer to the diagram. Figure 1 and Figure 2 In this embodiment, the insulating paper structure 100 is suitable for a cylindrical stator core 50. The inner circumference of the stator core 50 has multiple slots 52, and the coil 54 is wound in the multiple slots 52. The insulating paper structure 100 includes multiple cylindrical insulating papers 110, which are inserted into the coil 54 to insulate the multiple layers of coil 54 from each other. A refrigerant pipe 60 is used to supply refrigerant (e.g., cooling oil) to the coil 54 through a supply path 62. Figure 1 The diagram schematically shows the refrigerant pipe 60 and the supply path 62. This utility model does not limit the specific structure of the refrigerant pipe 60 and the supply path 62.

[0039] Figure 3 yes Figure 1 A partial top view of the stator core and insulating paper. Figure 4 yes Figure 1A partial 3D view of the stator core and insulating paper. Please refer to the following: Figure 2 to Figure 4 Specifically, the stator core 50 has opposing first sides 50a and second sides 50b along its axial direction A. The coil 54, as... Figure 3 As shown, on the second side 50b, it is configured as a twisted, closed shape, preventing the insertion of the insulating paper 110. Coil 54, as... Figure 3 and Figure 4 As shown, the first side 50a has multilayer coil ends 541 arranged radially R apart along the stator core 50, forming an open structure, and multiple insulating papers 110 are as follows: Figure 2 The insulating paper 110 is formed into cylinders of different sizes, allowing multiple insulating papers 110 to be inserted between the ends 541 of the multilayer coil at different positions in the radial direction R. Figure 4 As shown, an insulating paper 110 is inserted between every two adjacent coil ends 541. Thus, the insulating paper 110 insulates the multi-layered coil ends 541 of the coil 54 on one side (first side 50a) of the stator core 50 along the axial direction A.

[0040] Figure 5 yes Figure 1 A partial front view schematic diagram of the stator core and insulating paper. Please refer to... Figure 5 In this embodiment, the coil 54 includes a wire 54a, a coating 54b, and a solder joint 54c. The coating 54b covers the wire 54a, and the solder joint 54c solders the ends of adjacent wires 54a together. The detailed connection relationship between the wires 54a of the coil 54 is known technology in the field of rotating electrical machines and will not be described in detail here.

[0041] Figure 6 and Figure 7 They are Figure 1 A schematic diagram showing the stator core and insulating paper at different radial positions when viewed radially. Please refer to... Figure 5 to Figure 7 In this embodiment, the insulating paper 110 has a refrigerant hole 110a for allowing the refrigerant to pass through. In the axial direction A (indicated by...) Figure 1 and Figure 2 On the ) the refrigerant hole 110a is larger than the central part of the insulating paper 110 ( Figure 6 and Figure 7 The central line M of the central portion of the insulating paper 110 along the axial direction A is closer to the edge E of the insulating paper 110. When the insulating paper 110 is inserted between the coil ends 541, the refrigerant hole 110a is closer to the central portion of the insulating paper 110 than the central portion of the insulating paper 110. Figure 6 and Figure 7 The central line M of the central portion of the insulating paper 110 in the axial direction A is close to the stator core 50, and the refrigerant hole 110a does not overlap with the coil 54 in the radial direction R of the stator core 50.

[0042] As described above, in the insulating paper structure 100 of this embodiment, the insulating paper 110 has a refrigerant hole 110a through which the refrigerant passes. Therefore, the refrigerant can flow smoothly throughout the entire coil 54 without using excessive refrigerant. Furthermore, the refrigerant hole 110a is arranged in a manner that does not overlap with the coil 54. Therefore, the presence of the refrigerant hole will not damage the insulation between adjacent multilayer coils 54. Thus, the insulating paper structure 100 of this embodiment can save refrigerant and prevent a decrease in the dielectric strength between the multilayer coils 54.

[0043] Please refer to Figure 5 Furthermore, the refrigerant holes 110a of the insulating paper 110A between the ends 541 of the multilayer coil are staggered with the refrigerant holes 110a of the adjacent insulating paper 110B between the ends 541 of the multilayer coil. That is, the refrigerant holes 110a of the insulating paper 110A do not overlap with the refrigerant holes 110a of the insulating paper 110B in the radial direction R. Accordingly, after the refrigerant passes through the refrigerant holes 110a along the radial direction R, it first diffuses at the coil 54 along the arrangement direction of the refrigerant holes 110a (circumferential direction C of the stator core) and then reaches and passes through another refrigerant hole 110a. This helps to ensure that the refrigerant flows sufficiently throughout the entire coil 54 to improve cooling efficiency.

[0044] Figure 8 and Figure 9 They are Figure 1 A schematic diagram showing the insulating paper at different radial positions. Please refer to... Figure 8 and Figure 9 In this embodiment, the insulating paper 110 also has a positioning part 112, which and the refrigerant hole 110a are respectively located in the central part of the insulating paper 110. Figure 8 and Figure 9 The positioning part 112 is located between two adjacent refrigerant holes 110a in the arrangement direction (circumferential direction C of the stator core) of the plurality of refrigerant holes 110a. That is, the positioning part 112 does not overlap the refrigerant hole 110a in the axial direction A. The positioning part 112 is used to... Figure 6 As shown, the coils 54 are positioned at the first side 50a of the stator core 50. Accordingly, the position of the refrigerant hole 110a can be easily determined when setting the insulating paper 110.

[0045] In summary, the insulating paper structure of this invention has refrigerant holes for refrigerant to pass through. Therefore, the refrigerant can flow smoothly throughout the entire coil without requiring excessive refrigerant. Furthermore, the refrigerant holes are arranged so as not to overlap with the coil. Therefore, the presence of the refrigerant holes will not damage the insulation between adjacent multi-layer coils. Thus, the insulating paper structure of this invention can save refrigerant and prevent a decrease in dielectric strength between multi-layer coils.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An insulating paper structure suitable for a cylindrical stator core, an inner periphery of the stator core having a plurality of slots in which coils are wound, characterized by, Comprising: a cylindrical insulating paper insulating between coil end portions of the coil on at least one side in an axial direction of the stator core, the insulating paper having a refrigerant hole closer to an edge of the insulating paper than a central portion of the insulating paper, the refrigerant hole being for passing a refrigerant, the insulating paper being inserted between the coil end portions so that the refrigerant hole is closer to the stator core than the central portion of the insulating paper, and the refrigerant hole does not overlap the coil in a radial direction of the stator core, the insulating paper structure including a plurality of the insulating papers, the refrigerant hole of any of the insulating papers between the coil end portions being staggered with the refrigerant hole of another of the insulating papers adjacent thereto between the coil end portions.

2. The insulating paper structure according to claim 1, wherein the insulating paper further has a positioning portion, the insulating paper has a plurality of the refrigerant holes, the positioning portion is between two of the refrigerant holes adjacent to each other among the plurality of the refrigerant holes.

Images