Abstract
In this paper, we propose a new position sensor-less control system for an electric vehicle that is driven with a permanent magnet synchronous motor. To drive a permanent magnet synchronous motor high efficiency, we need to do the vector control. The rotor position of the motor is necessary to do the vector control. A proposed method detects the rotor position of the motor by motor currents, and can materialize the low cost motor control unit. The position sensor-less control system is suited to an electric vehicle, because it has high responsiveness. As experimental results, the system was possible that it corresponds to the unique action of the vehicie.
