CN205264362U - Corona -resistant polyimide film -sintered enameled rectangular copper wire - Google Patents

Abstract

The utility model relates to the technical field of power cables, in particular to a corona-resistant polyimide film sintered enamelled copper flat wire, which includes a conductor, and the surface of the conductor has an insulating paint film formed by curing after baking. The conductor and the insulating varnish film constitute an enamelled flat wire, and the enamelled flat wire is wrapped with an insulating layer, and the insulating layer is arranged outside the enamelled flat wire in an overlapping wrapping manner with an overlapping width of more than 50%. The utility model ensures that the internal crystal phase structure is compact and uniform, and the mechanical and electrical properties are stable and consistent, and its various properties are all better than the values required by the GB5584 standard. The temperature resistance grade of enamelled copper flat wire is above 180, and polyesterimide or polyesterimide/polyamideimide composite enamelled copper flat wire is used. Coating insulating varnish on the surface of the copper conductor, and forming a varnish film after multiple times of varnish baking and curing.

Description

Corona-resistant polyimide film sintered enamelled flat copper wire

technical field

The utility model relates to the technical field of power cables, in particular to a corona-resistant polyimide film sintered enamelled copper flat wire.

Background technique

The glass fiber-wrapped film-wrapped magnet wire needs to have a high temperature resistance level, high withstand voltage requirements and strong mechanical properties, but the existing glass fiber-wrapped film-wrapped magnet wire generally has poor temperature resistance and poor mechanical properties. Strong problem, such as the patent application number is: CN200520084040.5, the application date is 2005.6.10, the utility model patent named "hollow copper flat wire wrapped with three glass filaments", its technical solution is: the utility model provides a three-glass filament Hollow-core copper flat wire belongs to the field of cable technology. Its structure is composed of hollow copper conductors and insulating layers and protective layers on the outside of the conductor. There are four layers of insulation and three layers of protection, with a hollow copper conductor adjacent to the innermost layer of insulation.

Contents of the invention

In order to solve the common problems of poor temperature resistance and weak mechanical properties of the glass fiber-wrapped film wrapped electromagnetic wires in the prior art, the specific scheme of the utility model is as follows:

A corona-resistant polyimide film sintered enamelled copper flat wire is characterized in that it includes a conductor, and the surface of the conductor has an insulating paint film formed after being baked and cured, and the conductor and the insulating paint film form an enamelled flat wire. The enamelled flat wire is wrapped with an insulating layer, and the insulating layer is arranged outside the enamelled flat wire in an overlapping wrapping manner with an overlapping width of more than 50%.

The insulating layer is a composite structure, and the composite structure is specifically a polyesterimide coating in the middle layer, the upper layer and the lower layer are polyamideimide coatings, and the middle of the two layers of polyamideimide coatings is polyesterimide coating. Amine coating.

The thickness of the polyamide-imide coating is 1-2 times that of the polyesterimide coating.

The polyesterimine is grade 180 polyesterimine or grade 200 polyesterimine.

The conductor is a hollow copper tube.

The insulating paint film is a grade 180 polyacetyl acetal resin insulating paint film.

The utility model has the advantages of:

The utility model ensures that the internal crystal phase structure is compact and uniform, and the mechanical and electrical properties are stable and consistent, and its various properties are all better than the values required by the GB5584 standard. The temperature resistance grade of enamelled copper flat wire is above 180, and polyesterimide or polyesterimide/polyamideimide composite enamelled copper flat wire is used. Coating insulating varnish on the surface of the copper conductor, and forming a varnish film after multiple times of varnish baking and curing. The specific corona resistance performance of the film is superior to that of ordinary sintered films. At the same time, in order to make the corona-resistant polyimide film have strong tensile strength and bending resistance after sintering, an overlapping winding with a lap width of more than 50% is used. Package mode, improve performance indicators. After the wrapping is heated, baked and sintered, the film and the enameled wire are integrated, which has excellent electrical properties and good mechanical properties.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is an enlarged view of the insulating layer of the present invention.

In the figure: conductor 1, insulating paint film 2, insulating layer 3, polyesterimide coating 4, polyamideimide coating 5.

detailed description

Example 1

A corona-resistant polyimide film sintered enamelled copper flat wire includes a conductor 1, the surface of the conductor 1 has an insulating paint film 2 formed after curing after baking, and the conductor 1 and the insulating paint film 2 form an enamelled flat wire. The enamelled flat wire is wrapped with an insulating layer 3, and the insulating layer 3 is arranged outside the enamelled flat wire in an overlapping wrapping manner with an overlapping width of more than 50%. The utility model ensures that the internal crystal phase structure is compact and uniform, and the mechanical and electrical properties are stable and consistent, and its various properties are all better than the values required by the GB5584 standard. The temperature resistance grade of enamelled copper flat wire is above 180, and polyesterimide or polyesterimide/polyamideimide composite enamelled copper flat wire is used. The insulating varnish is coated on the surface of the conductor 1, and a varnish film is formed after multiple varnishes are baked and cured. The specific corona resistance performance of the film is superior to that of ordinary sintered films. At the same time, in order to make the corona-resistant polyimide film have strong tensile strength and bending resistance after sintering, an overlapping winding with a lap width of more than 50% is used. Package mode, improve performance indicators. After the wrapping is heated, baked and sintered, the film and the enameled wire are integrated, which has excellent electrical properties and good mechanical properties.

Example 2

A corona-resistant polyimide film sintered enamelled copper flat wire includes a conductor 1, the surface of the conductor 1 has an insulating paint film 2 formed after curing after baking, and the conductor 1 and the insulating paint film 2 form an enamelled flat wire. The enamelled flat wire is wrapped with an insulating layer 3, and the insulating layer 3 is arranged outside the enamelled flat wire in an overlapping wrapping manner with an overlapping width of more than 50%.

The insulating layer 3 is a composite structure, and the composite structure is specifically a polyesterimide coating 4 in the middle layer, and the upper and lower layers are polyamide-imide coatings 5, and the middle layer of the two-layer polyamide-imide coating 5 is For polyesterimide coating4. The thickness of the polyamide-imide coating 5 is 1-2 times that of the polyesterimide coating 4 . The polyesterimine is grade 180 polyesterimine or grade 200 polyesterimine. The conductor 1 is a hollow copper tube. The insulating paint film 2 is a grade 180 polyacetyl acetal resin insulating paint film.

The utility model ensures that the internal crystal phase structure is compact and uniform, and the mechanical and electrical properties are stable and consistent, and its various properties are all better than the values required by the GB5584 standard. The temperature resistance grade of enamelled copper flat wire is above 180, and polyesterimide or polyesterimide/polyamideimide composite enamelled copper flat wire is used. The insulating varnish is coated on the surface of the conductor 1, and a varnish film is formed after multiple varnishes are baked and cured. The specific corona resistance performance of the film is superior to that of ordinary sintered films. At the same time, in order to make the corona-resistant polyimide film have strong tensile strength and bending resistance after sintering, an overlapping winding with a lap width of more than 50% is used. Package mode, improve performance indicators. After the wrapping is heated, baked and sintered, the film and the enameled wire are integrated, which has excellent electrical properties and good mechanical properties.

Claims (5)

1. A corona-resistant polyimide film sintered enamelled copper flat wire, characterized in that: it includes a conductor (1), and the surface of the conductor (1) has an insulating paint film (2) formed by curing after baking, The conductor (1) and the insulating paint film (2) constitute an enamelled flat wire, and the enamelled flat wire is wrapped with an insulating layer (3), and the overlapping width of the insulating layer (3) is more than 50%. The overlapping wrapping method is set outside the enamelled flat wire; the insulating layer (3) is a composite structure, and the composite structure is specifically a polyesterimide coating (4) in the middle layer, and the upper and lower layers are polyamideimide Amine coating (5), the middle of two layers of polyamideimide coating (5) is polyesterimide coating (4). 2. The corona-resistant polyimide film sintered enamelled copper flat wire according to claim 1, characterized in that: the thickness of the polyamide-imide coating (5) is polyesterimide coating ( 4) 1-2 times. 3. The enamelled flat copper wire sintered with corona-resistant polyimide film according to claim 2, characterized in that: the polyesterimide is grade 180 polyesterimide or grade 200 polyesterimide. 4. The flat enamelled copper wire sintered with corona-resistant polyimide film according to claim 3, characterized in that: the conductor (1) is a hollow copper tube. 5 . The corona-resistant polyimide film sintered enamelled copper flat wire according to claim 4 , characterized in that: the insulating paint film ( 2 ) is a grade 180 polyacetyl acetal resin insulating paint film.