Low MOSFET Count Isolated DC–AC Converter

This letter proposes a novel soft-switched single-stage-isolated dc-ac converter topology from the industry point of view. The proposed converter requires a lesser number of MOSFETs compared to a widely studied cycloconverter-type (CCT)-isolated dc-ac converter topology. This converter provides lower duty cycle loss, better efficiency, and electromagnetic interference performance compared to a CCT dc-ac converter. Also, it is thermally more stable, thus requires a smaller heat sink. The converter operation is demonstrated in a 1-kW prototype developed with SiC MOSFETs.