A switched-capacitors based multilevel boost inverter with single input source

Abstract

This paper proposes a novel hybrid topology for multilevel inverters with the capability of boosting the input voltage. The proposed structure permits use of single input DC source for multilevel voltage generation at the output. It combines a switched capacitor part with an H-bridge part along with an auxiliary switch. Operation of the topology is explained with the help of a single source five-level boost inverter. An appropriate control scheme is described and simulation results are presented. A comparison with the conventional topologies is also presented in the paper. It seen that the proposed topology requires lesser number of components for higher number of levels and would be less costlier and effective in terms of overall volume.