DRIVE MOTOR FOR AN ELECTRIC VEHICLE

摘要

The disclosed drive motor for an electric vehicle makes it possible, without increasing the diameter of a rotor in the motor, to stop the rotor from rotating with respect to a rotation output shaft. The disclosed drive motor is an IPM motor with a rotor (25) that comprises: a rotor core (29) with an inner surface that has a circular cross-section and fits around a rotation output shaft (24); and permanent magnets (30) disposed inside the rotor core (29). At angular positions near parts of permanent magnets (30) that are tilted towards the outer edge of the rotor core (29), the inner surface of the rotor core (29) and the outer surface of the rotation output shaft (24) are provided with non-circular sections (29a and 24a), with non-circular cross-sections, that constitute rotation-stopping means (31) that stop the rotor (25) from rotating with respect to the rotation output shaft (24).