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碳化硅是一种具有非线性导电机理的半导体材料,近年来,国内外已广泛地采用它作为高压电机防晕处理。使用碳化硅材料防晕较之碳黑半导体漆有一系列优点。例如,利用碳化硅的电阻随场强变化的特性,可使电机定子线圈端部电场分布更均匀,从而提高了线棒起晕电压和闪络电压;碳化硅漆(胶)的电阻随温度变化较小,发电机运行时的温升对碳化硅防晕的线棒的起晕电压影响
Silicon carbide is a semiconductor material with a non-linear conductive mechanism. In recent years, silicon carbide has been widely used as a high-voltage motor anti-corona treatment at home and abroad. The use of silicon carbide anti-corona carbon black semiconductor paint has a series of advantages. For example, the use of silicon carbide resistance changes with the field strength of the characteristics of the stator coil can be more uniform electrical field distribution, thereby increasing the coil voltage and flashover voltage flashover; silicon carbide paint (plastic) resistance with temperature changes Smaller, temperature rise of the generator during operation affects the halo voltage of the silicon carbide anti-corona coil