The techniques, PWM soft switching, active power factor correction(APFC), electric-magnetic compatible and electric-magnetic interfere design, simulation research and brainpower controlling are the new focus of welding power supply.

• 脉宽调制软开关电路、有源功率因数校正、电磁兼容和电磁干扰设计、仿真研究及智能控制技术的应用已成为当前焊接电源研究的新热点。