Comparative Analysis of Conventional and Modified H-Bridge Inverter Configuration

TL;DR

This paper compares conventional and modified H-Bridge inverter configurations, showing that the modified version reduces switches, costs, and harmonic distortion while maintaining similar output levels.

Contribution

It introduces a modified H-Bridge inverter with fewer switches, reducing costs and losses, and provides a comparative analysis using MATLAB/SIMULINK.

Findings

Modified H-Bridge has fewer switches and lower costs.

7-level inverters have less harmonic distortion than 5-level.

Simulation results confirm improved performance of the modified design.

Abstract

In this paper, a comparative analysis is presented for conventional and modified H Bridge configuration of 5 and 7 level inverter. A modified H Bridge converter utilizes a reduced number of switches for the same level output as compared to the conventional H-Bridge configuration. The lower number of switches will result in reduced switching losses, installation cost and converter cost. MATLAB/SIMULINK software is used for simulation of the different configurations used for the comparison. R and RL type of load are used and the corresponding voltage waveform is analyzed for its harmonic content. It can be seen from the results obtained that the Total Harmonic Distortion (THD) in the modified and conventional 7 level configuration is less than that of the 5 level inverter configurations.