LAUSR

The governments worldwide have initiated programmes for faster adoption of electric vehicles (EVs) to meet the targets of the Paris Climate Change Agreement. One of the major challenges in meeting the targets of EVs’ programmes is to develop cost effective and different types of EV drivetrains in a short span of time. One possible way to reduce the development time is to adapt systems and techniques, existing in industry applications, for EV application. Since, EV motor has to operate over a wide speed and torque range, it is necessary to ensure that the controller should have a good dynamic response over the entire operating range. An induction motor-based drivetrain with direct torque control (DTC) is chosen in this work. The DTC suffers from high torque ripple, and it will have an impact on rideability and comfort. To improve the performance of the DTC algorithm, a multi-band error status selection (ESS) method for the torque hysteresis controller is proposed and compared the existing ESS method. The proposed modification in the DTC architecture is tested on an experimental test bed for standard drive cycles used for validation of vehicles. The experimental results show that drive performance is enhanced using the proposed methodology.