Hardware Implementation of Single-Phase 9-Level Hybrid H-Bridge Multilevel Inverter with Reduced Components

Abstract

To overcome the disadvantages of conventional Multilevel Inverters (MLI) like requirement of more number of components which will further increase the complexity to generate gate pulses and hence the overall cost, a hybrid topology has been suggested in this paper. Compared to the conventional multilevel inverter, the number of dc voltage sources, switches, installation area, and converter cost is significantly reduced as the number of voltage steps increases. This paper includes the design and simulation of the hybrid converter with different types of PWM techniques. This hybrid converter is a combination of T-Type single phase inverter and H-Bridge module with sub switches. In this hybrid topology, Switching functions are improved in easy way. High quality output voltage wave is obtained in simulation results. It reduces dv/dt stresses experienced by switches and also output voltage harmonic component are low.