一、前言在电力或电子设备中通常出现的浪涌电压,除因大气雷电所致,主要是在切换含有电感、电容的电路的瞬时所产生。目前应广泛采用氧化锌压敏电阻来抑制浪涌电压,以保护设备和元件,但在高压大功率电源中,压敏电阻所遇到的工作条件十分恶劣,如果设计不当,会 I. INTRODUCTION The surge voltages commonly found in power or electronic equipment, except those caused by atmospheric lightning, are mainly generated at the instant of switching circuits containing inductors and capacitors. At present, zinc oxide varistors should be widely used to suppress the surge voltage to protect the equipment and components. However, in the high-voltage high-power power supply, the varistor encounters very bad working conditions, and if not properly designed, will