Single phase symmetrical and asymmetrical design of multilevel inverter topology with reduced number of switches

Abstract

Multilevel Inverters have shaped a new trend of importance in industry and research. A new topology of multilevel inverter is proposed in this paper which can be operated in symmetrical and asymmetrical modes. The proposed topology produces 7-level and 13-level staircase output voltage waveform for symmetrical and asymmetrical configuration respectively using only 10 switches. The gate signals for the different switches are produced employing the fundamental frequency switching technique. The topology achieves better performance using a lower minimum number of components in comparison to conventional inverters. These improvements result in reduced system cost and size. Simulations are carried out using MATLAB/SIMULINK environment and experimental implementation using laboratory prototype module have ascertained the performance and operation of the proposed topology.