A Novel Quadruple-Boost Nine-Level Switched-Capacitor Inverter

A novel single-phase nine-level switched-capacitor inverter (9LSCI) with quadruple-boost ability and reducing the component counts is proposed. Only one DC source, nine switches, two diodes and two switched capacitors (SCs) are employed in the basic unit of the proposed topology to realize nine-level output. Due to the passive voltage balancing of each capacitor maintains a constant voltage without additional control. A simple logic-gate-based pulse width-modulation scheme is developed for gating switches of the proposed topology. The working principle of the basic unit topology, the voltage/current stress on the switch, the determination of the capacitance and the simulation and the experiment at 400 W output power are introduced in this paper. In addition, an extended form of the basic unit is provided. A detailed analysis of the proposed topology has been carried out to show the superiority of the proposed converter with respect to the other existing MLI topologies. Various simulations are carried out in Matlab/Simulink R2021b and the feasibility is verified in experiments.