Parallel resonant inverter with auxiliary AC/DC converter used for induction heating

This article describes the parallel resonant inverter with the auxiliary AC/DC converter that limits commutation overvoltage and enables the energy of parasitic inductances to be returned to the feeding circuit. The use of the auxiliary AC/DC converter enables the connection of the HF transformer between the inverter output and a parallel resonant circuit as well as the operation of the inverter in the frequency range, ensuring ZVS type switching. The efficiency of the system was also improved.