Optimal switching time calculation in Predictive Torque Control

This paper presents an approach to include a variable switching time into basic Predictive Torque Control methods. Using a constant switching frequency, every second switching time is shifted aiming at the minimization of the torque ripple. The optimal switching time is derived analytically from the torque error function. The result is a simple equation which can easily be included in the prediction algorithm. The proposed method is compared with other approaches in simulation and experiment showing that it yields a significant reduction of torque ripple and mean torque error.