Technique for manufacturing frequency conversion varnished wire

Abstract

The invention discloses a production process of a frequency conversion lacquered wire. The process comprises the following steps: (1) paying off; (2) wire drawing; (3) cleaning; (4) annealing; (5) cooling; (6) varnishing, backing and cooling: firstly the surface of a norm wire is coated with 10 passes of the frequency conversion polyester paint, and then, 3 passes of polyamide-imide paint, after the surface is coated with each pass of paint, backing and cooling are performed, then the surface is coated with the next pass of the paint, the backing is performed from the lower layer to the upper layer during the process of backing, the temperature at the inlet of a baking oven is 220 DEG C, the temperature in the lower layer is 330 DEG C, the temperature is 330 DEG C before the primary catalyzing is performed, and the supplementary heat temperature is 430 DEG C after the catalyzing is performed; (7) lubricating; and (8) wire winding. By adopting the production process, the lacquered wire can be guaranteed to achieve the good corona resistance, thereby the insulation aging phenomena can be slowed down, and the service life of the motor can be prolonged.

Description

technical field [0001] The invention relates to a production process of an enameled wire, in particular to a production process of a variable frequency enameled wire. Background technique [0002] With the rapid development of power electronics technology and new semiconductor devices, AC speed regulation technology has been continuously improved and improved. The advent of the frequency converter with gradually improved performance, with its good output waveform and excellent performance-price ratio, makes it increasingly expand the market for AC speed regulation, so that AC frequency conversion speed regulation motors are widely used; Under the circumstances, the insulation of the enameled wire is prone to partial discharge and corona phenomenon of space charge accumulation, which accelerates the aging of the insulation and shortens the service life of the motor. The service life of many AC variable frequency motors is only 1-2 years, and some even only a few weeks or even...

AI Technical Summary

Problems solved by technology

The advent of the frequency converter with gradually improved performance, with its good output waveform and excellent performance-price ratio, makes it increasingly expand the market for AC speed regulation, so that AC frequency conversion speed regulation motors are widely used; Under the circumstances, the insulation of the enameled wire is prone to partial discharge and corona phenomenon of space charge accumulation, which accelerates the aging of the insulation and shortens the service life of the motor. The service life of many AC variable frequency motors is only 1-2 years, and some even only a few weeks or even The enameled wire of the motor is damaged during the trial operation, and the damage usually occurs between turns, that is to say, our ordinary enameled wire cannot meet the conditions of use of our three-phase asynchronous AC variable frequency speed regulating motor