SiC BJT-based full-ZCS quasi-resonant converter with improved efficiency for induction heating applications

SiC devices exhibits improved performances in terms of switching speed and reduced on-state voltage drop, especially if a high-voltage and high-temperature environment is considered. In this paper the impact and opportunities of using high-voltage SiC switching devices in a pulsed power supply oriented to domestic induction heating applications is analyzed. Considering the converter requirements, SiC BJT devices results the most appropriated technology, improving the efficiency and the reliability. The proposed converter has been experimentally verified and, additionally, a specific activation circuit to improve its efficiency is proposed.