A New Hybrid Multilevel Inverter with Reduced Number of Switches

An inverter converts DC into AC symmetrical square wave output voltage. The symmetrical square wave contains infinite number of odd harmonics. When these square wave used for electrical equipments, life of the electrical equipment decreases. So, Multilevel inverter produces higher output voltage levels near the sine wave and corresponding magnitude of harmonics reduced. The conventional MLIs are Cascaded H-bridge five-level MLI and Multistring five-level MLIs, which used PWM techniques, the switching losses are high, efficiency decreases and also cost of switches high. The proposed topology is Hybrid Multilevel inverter with reduced number of switches, the switches operated with fundamental frequency then switching losses are low and efficiency increases. A Hybrid MLI produced higher output voltage levels are seven, nine, eleven, thirteen and fifteen. The THD reduces when increasing the higher output voltage levels. The simulation results shown in the Matlab/simulink 2009b.