Novel Family of Single-Stage Buck–Boost Inverters Based on Unfolding Circuit

This paper describes a novel family of single-phase single-stage buck-boost inverters using output unfolding circuits. Operation principles and component design guidelines along with modulation techniques are presented and discussed. The simulation results confirm all theoretical statements. Experimental setup of the most promising solution is assembled and tested, where the efficiency for different operation modes is analyzed. Finally, the pros and cons along with applications of the proposed solutions are discussed in the conclusions.