针对普通的PWM控制的弧焊逆变器,在高频情况下会产生很大的开关损耗,影响电源的可靠性问题。提出了功率管利用谐振电感和谐振电容的谐振,在零电压下开通或关断。来减小开关损耗的方法。设计了采用IGBT作为开关元件的软开关弧焊电源,实现了移相控制的电压软开关桥式逆变电路和采用电流传感器的电流反馈系统及驱动电路。试验结果证实了该电路具有开关损耗低,可靠性高的优点。%This paper introduces the IGBT inverter powersupply for arcwelding and the principle of phase-shifting soft-switch inverting bridge circuit.The structure and characteristics of IGBT,driving circuit and the current feedback ,system using LEM current transducer are discussed.
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