Heat-resistant anti-corona wire coating enamel used for transformer and preparation method thereof

Abstract

The invention discloses a heat-resistant anti-corona wire coating enamel used for a transformer. The heat-resistant anti-corona wire coating enamel comprises the following raw materials in parts by weight: 35 to 45 parts of mixed resin, 3 to 7 parts of a crosslinking agent, 5 to 10 parts of an auxiliary agent, 7 to 13 parts of nanometer bauxite, 3 to 6 parts of nanometer silicon dioxide, 3 to 5 parts of a leveling agent, 16 to 24 parts of a solvent, 3 to 5 parts of nanometer silicon nitride and 2 to 3 parts of a silane coupling agent. The heat-resistant anti-corona wire coating enamel used for the transformer provided by the invention has good heat resistance, can reach a dielectric loss curve inflection point temperature of 170 DEG C, can be directly used for coating of an enameled wire, solves the problems of solubility, precipitation and low coating liquid viscosity and complicated process of coating the enameled wire for a conventional wire coating enamel, is greatly improved in insulation properties and wear resistance, and has the advantages of safe and reliable raw material components, low cost, simple and clear process, high practical values and good application prospects at the same time.

Description

technical field [0001] The invention relates to the technical field of transformer materials, in particular to a heat-resistant and anti-corona wire enamel for transformers and a preparation method thereof. Background technique [0002] With the rapid development of society, people rely more and more on various electrical appliances in their daily life, and put forward higher and higher requirements for the development of electrical appliances. Among them, the performance of insulating materials used in electrical appliances is improved. also received [0003] more attention. The mechanical strength of power transformer windings is crucial to improving the short-circuit impact resistance of transformer products, and an important method to improve the mechanical strength of windings is to use self-adhesive paint to tightly bond the single-wire windings together to form a rigid whole. [0004] As one of the core components of insulating materials for electrical appliances, e...

AI Technical Summary

Problems solved by technology

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a heat-resistant anti-corona wire enamel for transformers, which has good heat resistance, and the inflection point temperature of its dielectric loss curve can be It can be directly used for coating enameled wire when the temperature reaches above 170°C, which solves the problems of the previous enameled wire varnish compatibility, precipitation, low viscosity of varnish liquid and complicated enameled wire coating process, and the insulation performance and wear resistance have been greatly improved. At the same time, the raw material components of the present invention are safe and reliable, with low cost, simple process, high practical value and good application prospect