Performance analysis of a multilevel inverter topology with reduced switches

Multilevel inverter is very effective in reducing the harmonics of AC waveform and useful for high power applications. Compared to the conventional two level inverters, it has many advantages such as higher dc link voltages, low electromagnetic interference and reduced harmonic distortion. But, it has some disadvantages such as usage of more switches, voltage balancing problem and complex pulse width modulation control. Overcoming these disadvantages, in this paper a new multilevel inverter topology with reversing voltage component to improve the overall performance is proposed. The proposed topology requires less number of switches and carrier signals compared to other topologies. Hence the overall cost and complexity of the circuit is reduced especially for higher output levels. The performance of a nine level proposed topology has been analyzed in terms of total harmonic distortion (THD) by using MATLAB/Simulink.