A new hybrid control scheme using active-clamped Class-E inverter with induction heating jar for high power applications

Abstract

This paper presents a new hybrid control scheme using active-clamped Class-E (ACCE) inverter for induction heating (IH) jar. The proposed hybrid control scheme has characteristics, which act as Class-E inverter at lower switch voltage and ACCE inverter at higher switch voltage than reference voltage of the main switch by feeding back voltage of the switch as well as advantages of conventional ACCE inverter such as zero-voltage-switching (ZVS) of the main switch and the reduced switch voltage due to clamping circuit. Moreover, the proposed hybrid control method using ACCE inverter has higher output power than conventional control scheme since ACCE inverter is operated like Class-E inverter at low input voltage condition. The principles of the proposed control are explained in detail and the validity of the proposed control scheme is verified through the several interesting simulated and experimental results.