Resonant Inverter Topology for All-Metal Domestic Induction Heating

Nowadays domestic induction cookers usually heat ferromagnetic pans. This technology is well known and it is successfully applied by many manufacturers. However, there are a number of non-ferromagnetic pans (made of aluminium, copper, copper-nickel, or stainless steel) that cannot be properly heated by this technology. In this paper, a modified half-bridge series resonant inverter topology that can heat ferromagnetic and non-ferromagnetic pans is presented. This inverter topology has two topological configurations with two operation modes: first-harmonic operation mode (FHOM) and third-harmonic operation mode (THOM). This paper presents these two operation modes and the design of the principal parts of the inverter. Finally, the experimental results obtained with a prototype of the resonant inverter are presented.