Feasible evaluation of a full-bridge inverter for induction heating cooking appliances with discontinuous current mode PFC control

A high frequency soft-switching PWM inverter with PFC function suitable for consumer IH cooking appliance is presented in this paper. The proposed system is composed of a soft switching chopper based boost PFC converter with passive snubber and phase shifted PWM controlled full bridge ZVZCS high frequency inverter. In order to meet the utility AC grid current harmonic regulation, a simple PFC control technique with discontinuous current mode is introduced and tested in addition to the fundamental operating performances of the proposed system. Effectiveness of proposed IH system is substantially proved on the basis of the experimental results from a practical point of view.