FFT Analysis of AC Chopper Fed Single Phase Induction Motor Drive

Abstract

The aim of this work is to compare the harmonic spectrum of single switch, two switches and four switches AC chopper fed drives. This paper compares FFT spectrum of current in various types of choppers controlling the single phase induction motors. MOSFET based AC chopper is considered for the control of induction motor. Digital simulation is performed using Simulink and the corresponding results of FFT analysis are presented. THD of various configurations are compared.