अमूर्त

Speed Control of Single Phase Induction Motor Using AC Chopper by Asymmetrical PWM Method

R.Suneeth, P.Usha

In home appliances and in small scale industries, single phase induction motors are commonly used. Recently remarkable efforts have been made in adjustable speed - single phase induction motor drives (SPIMD’s). Different types of PWM strategies have been used in speed control of SPIMD’s, most widely sinusoidal PWM & space vector PWM strategies. Various converters technologies are taking a place in SPIMD’s because of its low cost. The proposed project describes the several PWM strategies with an AC chopper to control the speed of single phase induction motor. Asymmetrical PWM technique has been used to operate the power electronics switches (IGBT) of an AC chopper. The main objective of this project is to maintain the speed of the single phase induction motor constant at different load conditions by using Asymmetrical PWM technique, which reduces the harmonic contents in motor current and increasing the motor efficiency. The simulation is carried out in MATLAB/SIMULINK with a Split Phase Induction Motor, where the motor is operated in normal PWM strategy, Hysteresis PWM strategy. The hardware is designed for the Asymmetrical PWM technique and results have been discussed.