Bidirectional Flying Inductor Converter Based on Karschny Topology

This paper presents a Karschny-based transformerless inverter topology with a flying inductor to operate in DC-AC and AC-DC mode. Karschny has many advantages such as lack of transformer, no leakage current, simple design, high efficiency, high reliability and low price and small size. It is a common implementation choice for DC-AC inverters, but in the recent years, the interest of bidirectional topologies increase rapidly and the goal of this study is to propose design improvement which will allow the bidirectional operation of Karschny topology.