A New 5–Level Voltage Source Inverter

Abstract

This paper presents a new 5-level voltage source inverter for medium-voltage, high-power applications. The proposed topology uses a less number of active components in comparison with classical 5-level topologies. In the proposed inverter, the flying capacitors voltage needs to be regulated at 1/4 of the net dc-link voltage to generate a 5-level voltage waveform at the output. In order to control the output voltage and flying capacitors voltage, a space vector modulation (SVM) scheme is developed. This technique utilizes the redundancy switching states to generate a desired output voltage and regulate the flying capacitors voltage at their nominal value, simultaneously. The steady-state and transient performance of the proposed inverter are verified through MATLAB simulations.