An Asymmetric Switched Capacitor Multilevel Inverter With Component Reduction

Abstract

This paper proposes a new switched capacitor (SC-Type) inverter for asymmetrical multilevel inverters (MLIs) with fewer components. In order to balance the voltages of the capacitors, the proposed topology uses a special method to charge/discharge the capacitors. In the proposed inverter, the number of switches, the number of dc voltage sources, the amount of blocked voltage in the switches, and the power losses are reduced. Fewer components result in lower size, complexity, and cost of MLI. Cascade connection of the proposed topology is used to achieve a higher number of output voltage levels. The MATLAB simulations and experimental results of a 25-level MLI verify the good performance of the proposed inverter.

Keywords

• Multilevel inverters (MLIs)
• switched capacitor inverter
• asymmetric topology
• components reduction