Suitability of Electric Motors and Conventional Control Techniques for Electric Vehicle Applications

This article discusses the suitability of conventional speed control techniques for controlling the motor speed of an electric vehicle and takes induction motor control using direct torque control (DTC) technique as a case study. The main advantage of this technique is the simplicity of the hardware implementation in low cost platforms and precision in achieving any speed setpoint while the resistance torque variation. To expose the induction motor to the real challenges that arise in the electric vehicles, the speed control algorithm is tested under the New European Driving Cycle (NEDC) while imposing a resistive torque that emulates that of the real electric vehicle. The whole system is simulated under very challenging conditions in the PSIM platform , then the algorithm is implemented in the DSP TMS320F28335 platform to confirm its effectiveness in the real environment. The obtained results confirm that the direct torque control technique can be very useful in the speed control of electric vehicle induction motor.