Study of SPWM technique & simulation of designed analog circuit (Op-Amp) controlled three phase PWM inverter with harmonic reduction

Inverter is an obvious device to utilize the renewable energy resources. Pulse width modulation (PWM) technique is the most used technique for inverters. This paper represents the Sinusoidal PWM technique and shows how to generate PWM signal using different simple Op-Amp circuits for three phase voltage source inverter (VSI). It is a new design of Op-Amp circuit for switching the three phase PWM inverter. All the Op-Amp circuits have been simulated and their outputs have been shown step by step. This analog circuit (Op-Amp) controlled VSI has been simulated for both standalone load & high voltage sensitive loads/systems like micro-grid system and industrial machines respectively without and with transformer. The simulation results have been shown before and after harmonic reduction using a passive filter.