Abstract: Multilevel inverters have got high quality output when compared with two-level inverters so for high power purposes the usage of Multi-level inverter applications has grow more ubiquitous in industries. In this paper, foremost a new topology for sub-multi level inverters is proposed and then the series connection of sub-multilevel inverters is put forth as a generalized multilevel inverter. This proposed multi level inverter has reduced number of switching devices. The optimal structure concerning the criteria such as standard voltage on the switches, number of switches and number of dc voltage sources etc is succeed by paying a special attention. Asymmetric condition is verified for proposed multilevel inverter by using MATLAB SIMULINK software.

Keywords: Multilevel inverter, Optimal Structure, Sub-Multilevel inverter, Asymmetric condition, MATLABSIMULINK software.