MOTOR DRIVING SYSTEM FOR ELECTRIC VEHICLE

摘要

Provided is a motor driving system for an electric vehicle, the reliability of which is improved by controlling the rotation of a motor. The motor driving system comprises: a plurality of angular sensors (19A, 19B) for detecting a relative rotation angle between the stator (23) and rotor (25) of a motor (B) for driving an electric vehicle; and a controller (46) for controlling the rotation of the motor (B) according to the relative rotation angle detected by the angular sensors. The controller (46) has an angular sensor switching means (47) for selecting and activating one of the angular sensors (19A, 19B) and for, when it is determined that the angular sensor in operation is abnormal, switching the operation to another one of the angular sensors.