An Optimize Configuration of H-Bridge Multilevel Inverter
Sushree Smrutimayee Barah, Sasmita Behera
Abstract
A traditional H-bridge inverter requires a minimum of four controllable switches and this multiplies with the levels in the inverter output voltage goes up. This work represents an improved multilevel inverter with a reduced number of switches. An improved structure using the sub-multilevel concept is proposed for a five-level inverter. This modified H-bridge inverter uses the same level of an inverter with a 25% reduction in the number of switches. This results in reduced switching losses, installation cost, and converter cost. Special care is taken to obtain an optimal number of switches. The proposed inverter is simulated for a five-level using Matlab/Simulink with phase disposition pulse width modulation (PDPWM) control for both resistive and resistive-inductive load. A comparison between conventional and modified H-bridge inverter is shown.