On-off control based multi-frequency multi-load inverter configuration for induction cooking application

Abstract

Multiple load induction cooking application is in much demand today. This paper presents a Full bridge inverter operated at multiple frequencies for powering multiple induction heating loads. ADC control and PDM are employed. Three induction cooking loads are used. Each induction cooking load and one resonant capacitor forms a series resonant circuit. Two series resonant load circuits are simultaneously powered in one half cycle and another load is powered during next half cycle. Each load is operated at a constant frequency. Independent load power control is provided. The operation of the proposed inverter and simulation results are presented.