Design And Implementation of Intelligent Soft- Start Controller For Induction Motor Controlled By VSI

Abstract

This paper presents a practical implementation of the Fuzzy logic control toan electrical drive system. The hardware control circuits are divided into two groups,the first one is to determine the suitable trigger angle to the load according to theirwindings resistance circuit. The second is to monitor the motor operation and runs inorder to compensate the trigger angle value when any disturbances occur at the motor.The soft starters use the current through the stator winding of the motor as feedback,in which the voltage is adjusted through the setting of the IGBT firing angle. Thefeasibility and effectiveness of the control scheme are experimentally demonstratedand the results are compared with the conventional soft starter controller in dynamicresponses of the closed-loop drive system.