Dual PWM controlled soft switching high frequency IH load resonant inverter with lossless snubbing capacitor and switched capacitor

This paper presents a prototype of voltage-fed high-frequency IH load resonant inverter with lossless snubbing capacitor and resonant switched, along with its unique features. This high frequency soft commutation resonant inverter using IGBT power modules is developed for consumer induction heated cooking heater, steamer and super heated steamer. The operating principle of the high frequency resonant inverter proposed here in is illustrated my using periodic switching mode equivalent circuit. The voltage and current waveforms are verified through comparative simulation and observed results. Furthermore, the operating performances including high-frequency AC regulation and power conversion efficiency on the basis of dual duty cycle PWM scheme are discussed in experiment. The cost effectiveness of the proposed high frequency resonant soft-switching inverter is verified from a practical point of view.