Dual-frequency multiple-output resonant soft-switching inverter for induction heating cooking appliances

In this paper, a multiple-output high-frequency soft switching inverter is presented for home and business use “all metal” IH cooking appliances. The frequency and handling power of each output can be selected and regulated individually. The proposed inverter is composed of two single high-frequency circuit cells which are connected in parallel. Therefore, the number of switching devices in the proposed inverter can be significantly reduced. The simulation and experimental results indicate that the proposed circuit is suitable for the multiple output IH concepts such as free-zone induction heating, multi burner type cooking set-up and so on.