A comprehensive analysis of vector controlled induction motor drive

Abstract

The ruggedness of squirrel cage induction motor may be utilized by evolving an effective strategy for its speed control. In this paper, a control methodology for the current controlled voltage source inverter (CC-VSI) fed induction motor is considered. The proposed control strategy employs the concept of field orientation, also known as vector control. In the closed loop vector control of the motor, a PID speed controller and field weakening block are employed. With a view to studying the dynamic behaviour of the induction motor in the closed loop, its detailed model is developed. The model is made more realistic by taking the magnetic saturation into account. The simulated results showing the dynamic response of a vector controlled induction motor drive are presented and discussed. The proposed drive is useful for the applications where high dynamic performance is required such as rolling mill, hoist, traction etc.