In recent years, multilevel inverters have attracted tremendous interest in the industry for the application in medium voltage and high power situations. The multilevel inverter (MLI) has a number of advantages, including the ability to operate at both fundamental and lower switching frequencies, the ability to draw low-distortion input current, and low total harmonic distortion (THD) in the output waveform without the use of a filter circuit. Multilevel inverter have been widely used in power factor compensators, interfacing with renewable energy sources, variable speed control of high power drives, electrical braking systems of the vehicles, back to back frequency link systems and DC power source utilizations. In this article, the brief review of classical multilevel inverter topologies are presented. The demonstration provides a new direction in the option of particular topology for multilevel inverter to relevant applications in the real world.

Keywords : Multilevel Inverter, THD, Power Drives