New multi-resonant induction heating high-frequency inverter with voltage-clamped zero current switching using newly developed bipolar mode static induction transistor

This paper is mainly concerned with the voltage-fed voltage-clamped type half-bridge topology of new instantaneous resonant current vector-regulated high-frequency inverter, which efficiently operates at zero-current, soft switched quasi-resonant, and load resonant tank circuit sub-resonant hybrid soft switching schemes. This proposed multi-resonant inverter version using newly-developed high-frequency high-power normally-off type bipolar mode static induction transistors (B-SIT) is more suitable for a modern induction-heating and melting power supply in industrial production plants. Its new conceptional operating principle is presented including the control strategy and its features. Its analytical results and performance evaluations are described through computer-aided simulation methods. A feasible breadboard inverter treated here is demonstrated for a state-of-the-art induction heating power supply and is examined in experiments from a practical point of view