Dual mode phase shifted ZVS-PWM series resonant high-frequency inverter with a single load side auxiliary edge resonant snubber for IH dual packs fluid heater

In this paper, a constant frequency phase shifting PWM controlled voltage source full bridge-type series load resonant high-frequency inverter using the 4th generation IGBT power modules is presented for innovative consumer induction heating applications such as a hot water producer, steamer and super heated steamer. The bridge arm link passive capacitive snubbers and AC load side link active edge inductive snubber-assisted series load resonant tank soft switching inverter with dual mode phase shifted PWM scheme is evaluated in order to alleviate the soft switching operation and discussed on the basis of the simulation and experimental results. It is proved from a practical point of view that the new series load resonant and edge resonant hybrid inverter topology including the phase-shifted PWM variable power regulation function can expand soft switching commutation range over high power to low power setting ranges, which is more suitable and acceptable for induction heated dual packs fluid heater as a new type of heat exchanger.