A Switched-Boost Four-Leg Inverter With Leakage Current Mitigation

A new switched-boost four-leg inverter is proposed in this article. By using two power switches in the switched-boost network as the fourth leg, the proposed inverter achieves constant common-mode voltage; thus, the leakage current is effectively mitigated. The reliability and boosting voltage of the proposed inverter can be ensured by shoot-through state insertion. The operating principle, mathematical analysis, control method, and comparative study of the proposed inverter are presented. Finally, simulation and experimental results have been performed on a 1.2-kW prototype inverter.