Abstract
In this paper, a new single-phase single-stage transformerless inverter is proposed for grid-tied and standalone applications. The proposed inverter has low leakage current and is capable to perform both buck and boost functions. Further, as compared to the conventional state of art buck-boost inverters, it can achieve high power density because the magnetic volume is reduced significantly. High power conversion efficiency with reduced EMI concerns can be realized because only one switch operates at high frequency. Moreover, there is no need for generating high frequency deadtime because all the remaining switches operate at line frequency. In order to verify the proposed topology, a laboratory prototype is designed for 500 W and the experimental results are provided as well.
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