A torque controller suitable for electric vehicles

A torque controller suitable for electric vehicles is studied, The controller ensures an induction motor generates the motor torque efficiently, stably, and accurately. The torque control system feeds back an assumed motor torque calculated using the secondary magnetic flux and the torque current detected from current sensors of the primary currents, The motor torque is controlled by using the torque current reference determined from the generated secondary magnetic flux and the magnetizing current reference, The magnetizing current reference is determined on the basis of the torque current reference so that the motor torque generation efficiency always becomes the maximum The magnetizing current regulator is operated according to the magnetizing current reference, This ensures the motor generates the motor torque stably even in transient states, Fundamental performance characteristics, such as response, accuracy, and efficiency of the motor torque are verified by simulation and experiments. The torque controller is judged suitable for the drive system of electric vehicles.