DESIGN AND SIMULATION OF INDIRECT VECTOR CONTROL SCHEME FOR TRACTION MOTOR DRIVE

Abstract

Induction motor of large rating are used in traction. This work is focused on developing the effective control strategies and configuration for control of Traction Motor Drive. This work is extended to control the speed and torque of traction motor using current control hysteresis loop controller. The proposed control strategy is analyzed and confirmed by simulation studies of mathematical models used. This work is carried out on 220 kW Traction Motor. Further, indirect vector control for the control of speed of traction motor is used in the present study Much attention has been given to the motor torque and speed control. At the present time, the Vector control has widespread use in high performance traction motor drives. It allows, by means of a co-ordinate transformation, to decouple the electromagnetic torque from the rotor flux, and hence manage speed control of traction motor. The decoupling control between the flux and torque allows traction motor to achieve fast transient response. Field orientation control can be obtained using hysteresis current controller.