Comparison of symmetrical and asymmetrical multilevel inverter topologies with reduced number of switches

Abstract

In last few years there is growing interest in multilevel topologies, because of many possibilities of expanding areas of power electronics use. It can also extend the application of power converters to higher voltage and power ratio. Multilevel inverters have attractive features like they requires the least number of components among all other Inverters to achieve the same number voltage levels, there exists no EMI problem. The general function of this multilevel inverter is to synthesize a desired voltage from several DC sources. In this paper mainly concentrated on reducing the number of switches and voltage sources. This paper illustrated that comparison between symmetrical and asymmetrical topologies for twenty five level simulations are presented using MATLAB/SIMULINK software.