A generalized switched-capacitor step-up multilevel inverter employing single DC source

In this paper, a new generalized step-up multilevel DC-AC converter is proposed, which suitable for applications with low-voltage input sources such as photovoltaic power generation and electric vehicles. This inverter can achieve high voltage gain by controlling the series-parallel conversion of DC supply capacitors. Only one source few devices are employed. The maximum output number levels be further increased through switched-capacitor unit's extension submodule cascaded extension. Moreover, capacitor voltages self-balanced without complicated control circuits. complementary operating mechanism between each pair switches simplifies modulation algorithm. inductive-load ability fully taken into account in proposed inverter. Additionally, remarkable characteristic that charging discharging states among different capacitors synchronous, reduces ripple frontend circuit structure, working principle, strategy, losses analysis presented detail. Afterwards, advantages analyzed comparing other recently inverters. Finally, steady-state dynamic performance verified validated simulation experiment. 1