Composite insulating film for motor notch

Abstract

The utility model discloses a composite insulating film for a motor notch, which belongs to the technical field of motor insulation and comprises an aramid fiber paper layer, an adhesive layer, an adhesive layer, a mica paper layer, an adhesive layer and a polyimide film layer which are sequentially stacked. The composite insulating film provided by the utility model has good insulating performance and mechanical strength, and also has relatively long electrical aging life, and can effectively protect enameled wires in a motor from being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor insulation, in particular to a composite insulating film for motor notches. Background Art

[0002] The insulating film is located between the motor coil and the slot, which insulates and protects the coil. An effective insulating film can extend the service life of the motor and improve its stability and performance. However, the motor slot insulating film is often affected by electrical aging. Under the action of the electric field, the insulating material undergoes physical and chemical changes, resulting in a decrease in insulation performance. Electrical aging can cause the dielectric strength of the insulating film to decrease and the temperature characteristics to deteriorate, thus affecting the safety and reliability of the motor. The current insulating film is obtained by sandwiching a layer of polyimide film between two layers of mica paper. As the performance of the motor continues to increase, the existing insulating film can no longer meet the use requirements. Utility Model Content

[0003] The utility model aims to provide a composite insulating film for a motor notch to solve the above problems in the prior art.

[0004] Provided is a composite insulating film for a motor notch, comprising:

[0005] The aramid fiber paper layer, adhesive layer, adhesive layer, mica paper layer, adhesive layer and polyimide film layer are stacked in sequence. Since the mica paper layer has no strength, it needs to absorb adhesive to provide strength for the mica paper layer to ensure that it will not delaminate after lamination, so there are two adhesive layers between the aramid fiber paper layer and the mica paper layer.

[0006] Aramid fiber paper has excellent heat resistance, chemical corrosion resistance and mechanical strength. It provides insulation and protection on the insulation film, reducing scratch damage to the surface of the insulation film caused by external equipment. Adhesives are used to adhere the layers together. Mica paper, as an insulating pad, has good heat resistance and chemical stability. It is used as a thermal insulation layer and can improve the overall corona resistance of the insulation film. Polyimide film has excellent heat resistance and electrical strength, mechanical properties and chemical stability, which can greatly improve the electrical strength performance of the composite material.

[0007] Furthermore, the thickness of the aramid fiber paper used in the aramid fiber paper layer is 0.05 mm to 0.1 mm.

[0008] Furthermore, the thickness of the mica paper used in the mica paper layer is 0.05 mm to 0.2 mm, and the weight per unit area is 80 to 220 g / m 2 .

[0009] Furthermore, the thickness of the polyimide film used in the polyimide film layer is 0.025 mm to 0.2 mm.

[0010] Furthermore, the material used for the adhesive layer is polyurethane adhesive or epoxy resin.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The composite insulating film provided by the utility model has good insulating performance and mechanical strength, and also has a relatively high electrical aging life, and can effectively protect the enameled wire inside the motor from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0014] Figure 1 The figure is a schematic diagram of the overall structure of a composite insulating film for motor slots.

[0015] In the figure: 1. Aramid fiber paper layer; 2. Adhesive layer; 3. Mica paper layer; 4. Polyimide film layer. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 As shown, in an embodiment of the utility model, a composite insulating film for a motor notch includes an aramid fiber paper layer 1, an adhesive layer 2, an adhesive layer 2, a mica paper layer 3, an adhesive layer 2 and a polyimide film layer 4 stacked in sequence.

[0019] Example 1

[0020] This embodiment provides a composite insulating film comprising a composite material of aramid fiber paper, mica paper, and polyimide film.

[0021] After unwinding, a layer of polyurethane adhesive is coated on the 0.05mm thick polyimide film, which is then baked to remove the solvent. A layer of 0.1mm thick mica paper is then laminated, and a layer of polyurethane adhesive is coated on the mica paper through a glue tank to form a composite layer. A layer of polyurethane adhesive is pre-coated on the aramid fiber paper through a glue tank, and the solvent is removed through an independent oven. The composite layer is baked in an oven and then laminated with the treated 0.05mm thick aramid fiber paper, rolled and rolled, and post-cured in a 105℃ oven for 48 hours.

[0022] Example 2

[0023] This embodiment provides a composite insulating film comprising a composite material of aramid fiber paper, mica paper, and polyimide film.

[0024] After unwinding, the 0.075mm thick polyimide film is coated with a layer of polyurethane adhesive and baked to remove the solvent. Then, a layer of 0.08mm thick mica paper is compounded and a layer of polyurethane adhesive is coated through the adhesive tank to form a composite layer. A layer of polyurethane adhesive is pre-coated on the aramid fiber paper through the adhesive tank and the solvent is removed through an independent oven. After being baked in the oven, the composite layer is compounded with the treated 0.05mm thick aramid fiber paper, rolled and rolled, and post-cured in a 90℃ oven for 72 hours.

[0025] Example 3

[0026] This embodiment provides a composite insulating film comprising a composite material of aramid fiber paper, mica paper, and polyimide film.

[0027] After unwinding, the 0.05mm thick polyimide film is coated with a layer of polyurethane adhesive and baked to remove the solvent. Then, a layer of 0.1mm thick mica paper is compounded and a layer of epoxy resin adhesive is coated through the adhesive tank to form a composite layer. A layer of polyurethane adhesive is pre-coated on the aramid fiber paper through the adhesive tank and the solvent is removed through an independent oven. After the composite layer is baked in the oven, it is compounded with the treated 0.05mm thick aramid fiber paper, rolled and rolled, and post-cured in a 105℃ oven for 48 hours.

[0028] Typical product values

[0029]

[0030] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A composite insulating film for a motor notch, characterized in that: include: An aramid fiber paper layer (1), an adhesive layer (2), an adhesive layer (2), a mica paper layer (3), an adhesive layer (2), and a polyimide film layer (4) are stacked in sequence.

2. The composite insulating film for motor notches according to claim 1, characterized in that: The thickness of the aramid fiber paper used in the aramid fiber paper layer (1) is 0.05 mm to 0.1 mm.

3. The composite insulating film for motor notches according to claim 1, characterized in that: The thickness of the mica paper used in the mica paper layer (3) is 0.05 mm to 0.2 mm, and the weight per unit area is 80 g / m 2 ~220g / m 2 .

4. The composite insulating film for motor notches according to claim 1, characterized in that: The thickness of the polyimide film used in the polyimide film layer (4) is 0.025 mm to 0.2 mm.

5. The composite insulating film for motor notches according to claim 1, characterized in that: The material used for the adhesive layer (2) is polyurethane adhesive or epoxy resin.

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