Production process for corona resistant polyimide film to produce winding wire

Abstract

The present invention discloses a method for manufacturing winding wires by corona resistant polyimide films, comprising the following steps: 1) alkaline solution processing; 2) cleaning and drying; 3) plasma processing at normal temperature; 4) coating resin latex; 5) baking and flowing and leveling; 6) withdrawing trays; 7) releasing copper flat wires; 8) folding packages; 9) high-frequency heating; 10) roll-up. With the present invention, after a surface chemical treatment and a normal temperature plasma treatment, the adhesion between the film and the copper conducting wires and between the films is firm, the mechanical strength is high. After being bent or stretched, the winding wire still has good adhesion performance and electric insulation performance, sealing and moisture resistant performance, heat resistant performance, and heat conduction performance. The thickness of the film is controlled between 0.03 and 0.038 mm. In the condition that the volume of a motor is not changed, the cross section of the conductor of the motor can be enlarged. The thermal resistance encountered during the period, when the heat generated during the running process of the motor is dissipated outward, is reduced. The insulation thermal aging speed is slowed and the service life of the motor is greatly prolonged.

Description

technical field [0001] The invention relates to a production method of a corona-resistant polyimide film insulated winding wire. Background technique [0002] A large number of motors are used in all walks of life. The average operating efficiency of ordinary motors is 10-20 percentage points lower. The annual loss of the motor itself will waste about 1500-1800 kWh of electric energy. In order to solve the problem of high energy consumption of this motor, frequency conversion is used. A variable speed motor is the most effective measure. However, in order to develop large-scale high-end variable frequency speed regulation motors, a large number of corona-resistant polyimide film winding wires are needed to solve the problem of short insulation life of frequency conversion speed regulation motors. The core of the motor, the applicant once applied for a Chinese invention patent application number 200710024321.5 on June 13, 2007, "a corona-resistant polyimide film and its manu...

AI Technical Summary

Problems solved by technology

[0003] Recently, corona discharge treatment is available for the surface of non-corona-resistant polyimide film, but for corona-resistant polyimide film, because of its strong corona resistance, corona discharge treatment is used. The method is no longer applicable. At the same time, corona discharge is a filamentary discharge, and the discharge energy is uneven. The area on the film that is treated is relatively small, and only 60-70% of the area

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