Optimum Gate-Drive Solutions for Soft Switching IGBT Resonant Voltage Source Inverters

Abstract

In static converters for induction heating, generally, resonant inverters are used. The commercially available IGBT devices are designed for hard-switching applications. Special gate drive techniques must be developed for soft switching conditions (zero voltage or zero current switching). In the paper gate drive solutions for soft switching IGBT inverters are investigated. Also short circuit active protection and parallel operation of inverter bridges are presented.