A Single-Phase Buck-Boost Derived Common-Ground Inverter

This paper presents a new topology for the single-phase buck-boost derived common-ground inverter (1P-BBD-CGI). The 1P-BBD-CGI uses two extra switching devices besides conventional inverting buck-boost DC-DC converter to feature DC-AC operation. In this topology, the negative point of output load is directly connected to the ground of the DC input source. Hence, this topology can completely eliminate leakage current. Furthermore, having a lower component voltage rating and using film-capacitor make the proposed inverter have higher efficiency and reliability than other previous common-ground inverters. The proposed 1P-CDCGI has been verified by simulation and experimental results with the help of PLECS software and 300-W laboratory prototype.