The hardware is designed for the Asymmetrical PWM technique and results have been discussed. 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 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. Asymmetrical PWM technique has been used to operate the power electronics switches (IGBT) of an AC chopper. The proposed project describes the several PWM strategies with an AC chopper to control the speed of single phase induction motor. Various converters technologies are taking a place in SPIMD's because of its low cost. Different types of PWM strategies have been used in speed control of SPIMD's, most widely sinusoidal PWM & space vector PWM strategies. Recently remarkable efforts have been made in adjustable speed-single phase induction motor drives (SPIMD's). In home appliances and in small scale industries, single phase induction motors are commonly used. The converter is mainly used, where load is very sensitive (battery-powered products), it provides variation of _1% only. In this work simulation and then hardware implementation is done with results. In this converter IGBT switch is digitally controlled by PIC microcontroller. In order to control the output voltage of the converter, the controller is designed to change the duty cycle of the converter. It requires power supplies with high efficiency, low cost and smaller size. Meanwhile, the demand for compact power supplies grows significantly.

Rising energy intensity leads to a higher cost of delivering power and low power density. The converters are electronic devices, it has an output voltage magnitude that is either greater than or less than the input voltage magnitude. DC converters are devices designed specially for the purpose of changing DC voltage levels efficiently. Many existing and developing electrical and electronic technologies require voltages of different levels supplied from a singular available source voltage such as a battery.

Tuning pid controller labview