Performance Improvement of Sensorless Vector Control of Induction Motor Drive by Improving Estimation of Rotor Resistance

Abstract

The induction motor is more popular for its superior performance compared to its counterparts and it is widely used in industry. The popularity of squirrel cage induction motor is attributed to its ruggedness and simplicity of construction. Induction motor finds application in number of domestic as well as industrial application. But superior control of induction motor There are two control methods like scalar control and vector control. The scalar (V/f) control method is simple and cost effective. The dynamic response of scalar control of induction motor drive is average. Vector control method of induction motor drive gives fast dynamic response .The vector control of induction motor is used instead of scalar control aims at decoupling the torque and flux producing components of stator current under all operating speed and load conditions. The main problem with Sensorless vector control induction motor drive is estimation of induction motor parameters. It is very essential to estimate the rotor resistance accurately to improve the performance of induction motor drive. This project is focused on to come with the accurate and reliable technique to estimate rotor resistance accurately.