Comparative Study of Different Drive Controller for a Traction System

The electrical traction locomotive often uses an induction motor due to the fact that it has many advantages; it has a simple construction robustness, high reliability, low maintenance cost besides it is the cheapest. This motor can be easily controlled by different techniques. This paper compares between four different types of control techniques that are used to control the motor speed. These methods are the field-oriented control using space vector modulation (FOC-SVM), the field-oriented control using hysteresis (FOC-hy), the direct torque control using hysteresis (DTC-hy) and the direct torque control using space vector modulation (DTC-SVM). MATLAB SIMULINK is used to conduct this study to show the behavior of the induction motor (IM) under these different control techniques. A comparison between the different control techniques is obtained for a train journey between two stations. The results of the study show the motor stator voltage, stator current, input and output power consumption, input and output energy, electromagnetic torque and motor speed in the time domain for the motor under study.