Indian Journal of Science and Technology

Abstract

Objective: This paper presents the reversing voltage strategy for a multilevel inverter to enhance the power quality of the induction motor by reducing the THD with optimal no of switches. Method: The SPWM-PD technique was implemented to generate gate driver signals to regulate the 7 level and 9 level, reversing voltage multilevel inverter which requires only three carrier signals instead of six in conventional multilevel inverters. Findings: Increasing the levels during this strategy aid in the reduction of output voltage harmonics expeditiously and improves power quality at the output of the 7 level and 9 level inverter of reversing voltage strategy. It wants a lowered quantity of total switches, which is in a position to decreases of switching losses in this process. The Three-phase reversing voltage multilevel inverter of 7- level and 9- level is accomplished for R-load and R-L load and Three Phase Induction Motor. Improvements: A reversing voltage multilevel inverter of 7- level and 9- level was implemented using MATLAB/Simulink software and the simulation results show 9’level inverter has better performance in terms of Low THD and better power quality compared to 7-level inverter with reverse voltage strategy.
Keywords: Reversing Voltage Multilevel Inverter, Phase-Disposition SPWM, Three Phase Induction Motor