| 摘要 |
A drive motor for an electric vehicle is an IPM motor including a motor rotor (25), which is made up of a rotor core portion (29) having an inner peripheral surface, which is mounted externally on a rotary output shaft (24) and which is round in sectional shape, and a permanent magnet (30) disposed within the rotor core portion (29). At a circumferential position which will become proximate to a site of the permanent magnet (30), displaced towards an outer diametric side of the rotor core portion (29), an inner peripheral surface of the rotor core portion (29) and an outer peripheral surface of the rotary output shaft are provided with respective non-round shaped portions (29a, 24a) of a circular shape in section, which form respective parts of a detention or arresting unit (31) for arresting the motor rotor (25) from rotating relative to the rotary output shaft (24). |
