Comparison of Control Methods for Asynchronous Motors within Electric Vehicles

This paper compares two control methods for electric vehicle propulsion by means of asynchronous motors. The basic underlying powertrain configuration and the control structure is presented. Two control methods, a symmetrical sinusoidal modulation and a rotational space vector hysteresis control are introduced and compared. Simulations are shown for both controllers using a single asynchronous motor. The rotational space vector hysteresis controller allows a reduction of power losses by a reduction of switching processes. Furthermore it gives the opportunity to avoid filter effort by reducing single high amplitude harmonic influence.