Design of a variable speed drive with dynamic braking for induction motor for electric vehicles

This paper presents the design of an adjustable speed induction motor drive destined for electric vehicles. Computer aided design was used and a PSpice model for the induction motor was created for simulation purposes. The major contribution of this work is the hysteresis current control scheme proposed, based on a linear model of the rotor current in function of the slip. Analog circuits carried out the control algorithm and a microcontroller was used for current references generation resulting in a low-cost hybrid-signal controller. This control technique has given excellent experimental results confirming simulation previsions established beforehand