A TORQUE CONTROLLER SUITABLE FOR ELECTRIC VEHICLES

A torque controller suitable for electric vehicles is studied, The con troller ensures an induction motor generates the motor torque efficien tly, stably, and accurately. The torque control system feeds back an a ssumed motor torque calculated using the secondary magnetic flux and t he torque current detected from current sensors of the primary current s, The motor torque is controlled by using the torque current referenc e determined from the generated secondary magnetic flux and the magnet izing current reference, The magnetizing current reference is determin ed on the basis of the torque current reference so that the motor torq ue generation efficiency always becomes the maximum The magnetizing cu rrent regulator is operated according to the magnetizing current refer ence, This ensures the motor generates the motor torque stably even in transient states, Fundamental performance characteristics, such as re sponse, accuracy, and efficiency of the motor torque are verified by s imulation and experiments. The torque controller is judged suitable fo r the drive system of electric vehicles.