High-efficiency high-power density series resonant inverter based on a multi-Mosfet cell implementation

Resonant converters featuring soft switch on transitions are commonly used in the domestic induction heating application. In this paper, the design and implementation procedure of a high efficiency and high power density resonant inverter for induction heating applications is presented. The proposed converter is based on a multi-MOSFET cell implementation, and the main design challenges including device selection, gate drive circuit, and cooling have been addressed. As a conclusion, a 4-kW low-profile fan-less implementation is obtained, which significantly improves state-of-art technology in terms of efficiency and power density.