A soft switched PWM inverter topology with SiC-MOSFET/Si-IGBT hybridized resonant cells and its pulse patterns are explored in this paper. The dual-side active edge-resonant cells (DARC)-assisted auxiliary resonant commutation pole (ARCP) is the topological feature where no large chemical capacitors are demanded, which contributes for a high power density and long life cycle dc-ac inverter applications. The basic and extended pulse patterns are comparatively studied in terms of reactive power and recycling processes in the ARCP, whereby power conversion efficiency and commutation are theoretically revealed. Performances and practical effectiveness of the newly-developed soft switching half-bridge PWM inverter with 40 kHz SiC/Si power transistors hybrid implementation are demonstrated by experiments with a mini-scale prototype, and compared with the hard switching and RCD snubber PWM inverters.
.jpg "Kazuki Sato (he/him/his) photo")