CN212161327U

CN212161327U - Electromagnetic enameled wire with polyetherimide film on outer layer

Info

Publication number: CN212161327U
Application number: CN202021224064.7U
Authority: CN
Inventors: 林中尉
Original assignee: Nanjing Amtf Electronic Co ltd
Current assignee: Nanjing Fuli Heavy Industry Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-12-15
Anticipated expiration: 2030-06-29

Abstract

The utility model provides a can be water-fast, resistant oil, can effectively obstruct the erosion of external cooling liquid, guarantee insulating ability's skin has the electromagnetism enameled wire of polyetherimide membrane, and polyetherimide adhesive bonding performance is good, and this electromagnetism enameled wire can be used for any preparation that needs carry out protective coating or embedment winding after the coiling is accomplished, is particularly useful for the preparation that uses welding electromagnetism enameled wire as the flat wire motor of main technology. The electromagnetic enameled wire with the polyetherimide film on the outer layer comprises a wire covered with insulating paint on the outside, wherein the polyetherimide film is covered on the outside of the insulating paint.

Description

Electromagnetic enameled wire with polyetherimide film on outer layer

Technical Field

The utility model relates to an enameled wire, specifically speaking are electromagnetism enameled wire with polyetherimide membrane.

Background

Along with the continuous popularization of the application of the motor and the electric appliance, the performance requirements on the motor and the electric appliance are higher and higher, the weather resistance requirements on the electromagnetic enameled wire are continuously improved so as to reduce the volume of the electric appliance and improve the performance of the electric appliance, the motor with small volume and large power is a development trend, materials can be saved, the weight can be reduced, the performance is improved, but the high power density is realized, the heat dissipation capacity is required to be very strong, otherwise, the motor is easy to burn out. In a conventional motor heat dissipation structure (the heat of an electromagnetic enameled wire passes through slot paper, reaches an iron core, then reaches a shell and finally reaches cooling liquid), the thermal resistance is very high, and the heat dissipation requirement of a small-size high-power motor cannot be met. However, for the coating of electromagnetic enameled wires, the cooling liquid has a certain destructive capacity, for example, many insulating paints have high water absorption, and the paint layer fails due to long-term high-temperature water soaking. Therefore, an oil and/or water resistant protective layer is required to ensure that the insulation of the electromagnetic enamel wire is not damaged. In the prior art, a PEEK (polyether ether ketone) is used for laminating an electromagnetic enameled wire, although the protection capability of the PEEK can meet the requirement, the bonding property of the PEEK is poor, a connecting point needs to be encapsulated or covered with an insulating layer, and the poor bonding property can not ensure the insulating property and the service life of an electric appliance. Therefore, a coated electromagnetic wire which has good protective performance, good adhesive performance and high and low temperature resistance is needed.

Disclosure of Invention

The utility model aims at providing a can be water-fast, resistant oil, can effectively obstruct the erosion of external cooling liquid, guarantee insulating ability's skin has the electromagnetism enameled wire of polyetherimide membrane, and polyetherimide adhesive bonding performance is good, and this electromagnetism enameled wire can be used for any preparation that needs carry out protective coating or embedment winding after the coiling is accomplished, is particularly useful for the preparation that uses the flat wire motor of welding electromagnetism enameled wire as main technology.

The outer electromagnetism enameled wire that has the polyetherimide membrane, cover including the outside and have insulated paint's wire, the insulated paint outside covers has the polyetherimide membrane.

The electromagnetic enameled wire is a flat wire with a rectangular cross section.

In the electromagnetic enameled wire, the wire is a round wire with a round section.

Polyetherimide, namely polyether imide, PEI for short, is amber transparent solid, has inherent flame retardance and low smoke without adding any additive, the oxygen index is 47%, the combustion grade is UL94-V-0 grade, and the density is 1.28-1.42 g/cm 3. PEI has very strong high temperature stability and even non-reinforced PEI still has very good toughness and strength. Therefore, the PEI with excellent thermal stability can be used for manufacturing high-temperature heat-resistant devices. Has excellent mechanical performance, electric insulation performance, irradiation resistance, high and low temperature resistance and wear resistance, and can penetrate microwaves. PEI also has good flame retardancy, chemical resistance, and electrical insulation properties. The glass transition temperature is very high, reaching 215 ℃. PEI also has very low shrinkage and good isotropic mechanical properties. The glass fiber, the carbon fiber or other fillers are added to achieve the purpose of enhancing and modifying; the heat-resistant polymer alloy can also be combined with other engineering plastics to form a heat-resistant polymer alloy, and can be used for a long time at the working temperature of minus 160-180 ℃.

The utility model discloses an outer electromagnetism enameled wire that has polyetherimide membrane because PEI has water-fast, resistant oily characteristics, can effectively separate the erosion of external cooling liquid to the insulating varnish layer, ensures the insulating ability of electromagnetic wire, and the good bonding property of PEI makes PEI membrane package electromagnetism enameled wire can be used for any need to carry out the preparation of protective coating or the winding of embedment after the coiling is accomplished, is particularly useful for the preparation that uses welding process as the flat wire motor of main technology.

Drawings

Fig. 1 is a schematic cross-sectional view of an electromagnetic enamelled wire having a polyetherimide film on the outer layer.

Detailed Description

Referring to the electromagnetic enameled wire with a polyetherimide film on the outer layer shown in fig. 1, the wire 1 is coated with an insulating varnish 2 on the outside, and the insulating varnish 2 is coated with a polyetherimide film 3 on the outside. The wire 1 is a flat wire with a rectangular section.

The utility model discloses an outside the enameled electromagnetic wire, cladding one deck Polyetherimide (PEI) membrane forms the enameled and adds the PEI membrane package electromagnetic wire of membrane package.

The enameled electromagnetic wire refers to any conducting wire with an insulating varnish coated outside a conductor;

the material quality of the insulating paint, the thickness of the PEI film, the film coating process of the PEI film, the material quality of the lead and the like do not influence the protection scope of the patent.

The PEI membrane refers to a material which is formed by taking PEI as a main material, and the components, the content and the like of the additive do not influence the protection scope of the patent.

Claims

1. The electromagnetic enameled wire with the polyetherimide film on the outer layer comprises a wire covered with insulating paint, and is characterized in that: the insulating varnish is externally covered with a polyetherimide film.

2. The electromagnetic enameled wire according to claim 1, wherein: the wire is a flat wire with a rectangular section.

3. The electromagnetic enameled wire according to claim 1, wherein: the wire is a round wire with a round section.