A Single Phase Nine Level Inverter with Reduced Switches

In this paper, a nine level multilevel inverter is proposed. The proposed nine-level inverter generates a nine levels Ac output voltage with the appropriate gate signals design. The topology is a self-voltage balanced across the series connected capacitors. The switching losses and the voltage stresses of power devices can be reduced in the proposed nine-level inverter. The operating principles of proposed inverter are discussed. The proposed multilevel inverter needs a single Dc voltage source with a series connection of four capacitors, three diodes, five acting switches for synthesizing output voltage levels and an H-bridge cell. Thus the proposed nine-level inverter helps in reducing the number of independent de voltage sources and switches. Also the harmonic content in the output voltage is very less when compared conventional topologies. The proposed topology is verified by using MATLAB/Simulink.