Anti-corona material for end parts of coil bars of motors and application method of anti-corona material

Abstract

The invention belongs to the field of new materials and particularly relates to an anti-corona material for end parts of coil bars of motors and an application method of the anti-corona material. The novel anti-corona material for the end parts of the coil bars of the motors and the application method of the anti-corona material, provided by the invention, are used for overcoming the defect in the prior art that the anti-corona effect is unstable due to the fact that end part materials for the coil bars of the motors are mostly single silicon carbide micropowder. The anti-corona material provided by the invention is prepared from the ingredients in parts by weight: 20-30 parts of beta silicon carbide powder with grain size smaller than 20 microns and 50-70 parts of alpha silicon carbide powder with grain size of 20 to 40 microns. The application method of the anti-corona material provided by the invention comprises the steps of mixing the anti-corona material with a tackifier, a dispersant and a curing agent so as to prepare an anti-corona coating, and then, preparing an anti-corona tape with the thickness of 1mm to 2mm. The anti-corona material provided by the invention has better electrical properties and is good in anti-corona effect and more stable in corona prevention.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to an anti-corona material at the end of a wire rod of a motor and an application method thereof. Background technique [0002] With the continuous increase of generator capacity and the improvement of voltage level, the anti-halation problem at the end of the motor bar is more prominent. The anti-halation at the upper and lower ends of the motor bar refers to a period of time Anti-halation treatment is performed on the part from the R bend to the hypotenuse at the end of the bar. At present, most of the common anti-corona treatment at the end of the motor rod uses silicon carbide for anti-corona. Silicon carbide is a semiconductor material with a nonlinear conductive mechanism. Its resistance automatically decreases with the increase of the electric field, and the field strength can be automatically adjusted. SiC is used as a mixture of conductive base and paint base for h...

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Problems solved by technology

[0004] Aiming at the defects that most of the materials at the end of motor wire rods use single crystal silicon carbide powder in the prior art, and...

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