INTELLIGENT PWM TECHNIQUE FOR VOLTAGE CONTROL OF DC-AC INVERTER

The purpose of this project is to intelligently use various Pulse Width Modulation (PWM) techniques for voltage control of DC-AC inverter. In this project, various PWM techniques are analyzed to see the difference between each of the technique. Then, fuzzy logic controller is chosen as a control scheme to control the output voltage of the inverter. The scopes include the simulation of various PWM techniques using MATLAB/SIMULINK, modeling and simulation of the PWM inverter, modeling and simulation of fuzzy logic controller (FLC) feed into PWM inverter, and finally the detail analysis on the output waveforms based on the simulation. Different PWM techniques will result in different value of peak voltage and different level of harmonics. Therefore, the right choice of the PWM technique is crucial in designing the inverter. Instead of using a conventional controller, this project was about to introduce the ability and also the advantages of the FLC to intelligently control PWM’s pulses in inverters application. This project is a comprehensive research study about various PWM techniques to control. This project results in a number of ways to control the PWM inverter by using FLC that can suit with a lot of industrial applications. For future work, it is highly recommended to use Artificial-Neural Network (ANN) as a control scheme to control output voltage of an inverter, and compare the results between ANN and FLC.