A Novel 3-Phase Symmetric/Asymmetric Reduced Device Count Multilevel Inverter for Electric Drive Applications

Due to the increasing demand of the electrical power in the industries, research and power distribution and transmission now day the multi -level inverter created a wave in industry and research as well as in power system. A multilevel inverter (MLI) is used to convert multiple lower level dc voltage into the desired level of alternating voltage. Multilevel inverter content large numbers of power electronics devices or switches which generate harmonics in output voltage as well as in current. This paper presents a complete model of advancement of MLIs with reduced device count by using the POD-PWM, APOD-PWM. This work presents a MATLAB/Simulink based model of fifteen level MLIs, with reduced switches and reduction in the THD of output voltage and current with its application. With help of simulation results, this work verifies that the proposed method has a significant effect on reduction of devices as well as in THD.