SYNCHRONOUS MOTOR AND MOTOR VEHICLE COMPRISING IT AND ITS CONTROLLING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a synchronous motor in which abnormal temperature rise is suppressed by predicting the temperature at a most overheated part of a winding through temperature measurement at one point, an electric vehicle comprising the synchronous motor and its controlling method. SOLUTION: The synchronous motor comprises a current sensor for detecting the AC current of two or more phases out of three-phase AC currents of the synchronous motor, a temperature sensor for detecting the temperature of the synchronous motor, and a temperature protective means for suppressing temperature rise of the synchronous motor wherein the temperature sensor comprises an operating unit for predicting the temperature of other windings based on the detected temperature located at a position for detecting the temperature of one of the windings for supplying the three-phase AC currents.