Corona-resistant enameled wire varnish for transformer and preparation method thereof

Abstract

The invention discloses corona-resistant wire enamel for a transformer. The corona-resistant wire enamel is prepared from the following raw materials in parts by weight (kg): 10-12 parts of nano aluminum nitride powder, 9-12 parts of amino resin, 3-4 parts of tetra(2-ethoxyl) adipamide, 2-3 parts of tri(2-ethoxyl) isocyanurate, 2-3 parts of styrene, 2-3 parts of a silane coupling agent KH560, 2-3 parts of dibutyltin dilaurate, 1-2 parts of smoke sheet rubber, 2-3 parts of mica powder, 3-4 parts of polyvinyl alcohol, 12-15 parts of nylon 11, 7-9 parts of an assistant, 100-120 parts of xylene and 100-120 parts of m-p-cresol. The corona-resistant wire enamel for the transformer with transparent liquor can be directly used for coating a corona-resistant enamelled wire, so that the problem that the prior nano corona-resistant wire enamel for the transformer is not dissolved with the liquor and precipitated, the liquor is high in viscosity, and the enamelled wire coating process is complex is solved. The corona-resistant wire enamel disclosed by the invention is simple in preparation process and convenient to operate, and the insulating and wear-resisting performances of the wire enamel are improved.

Description

technical field [0001] The invention relates to a wire enamel, in particular to a corona-resistant wire enamel for a transformer and a preparation method thereof. Background technique [0002] Enameled wire is a kind of electrical material. It processes a thin layer of high-strength insulating layer on the surface of a round copper wire to insulate it from the outside world. According to the specifications, it can be processed into a wool thread thinner than a hair, and a yarn-covered thread as thick as a thumb. Enameled wire has good insulation effect and waterproof ability. It is widely used in electrical appliances, such as motors, generators, water pumps, electromagnets, electric welding machines, household appliances, wireless communications, speakers, telegraphs, transformers, etc. Enameled wire enamel is a necessary insulating material for the production of enameled wire. Enameled wire enamel requires good adhesion, mechanical strength, insulation performance, heat ...

AI Technical Summary

Problems solved by technology

Enameled wire enamel is a necessary insulating material for the production of enameled wire. Enameled wire enamel requires good adhesion, mechanical strength, insulation performance, heat resistance, wear resistance, salt spray resistance and harsh environment resistance, etc., but ordinary wire enamel has resistance to It is difficult to meet the requirements of different environments due to problems such as thermal resistance, poor wear resistance, insufficient strength, and heat resistance below 120°C.