MOTOR GENERATOR AND ELECTRIC VEHICLE HAVING THE SAME

摘要

A rotary electrical machine (7) includes a rotational shaft (12) supported by a housing (11) for rotation, a rotor (13) coupled with the rotational shaft (12), a stator (14) fixed to the housing (11) to face the rotor (13), and a rotor position changing mechanism (15) for moving the rotor (13) in an axial direction of the rotational shaft (12) using a portion of transmission torque (T) transmitted between the rotational shaft (12) and the rotor (13) as driving force. The rotor position changing mechanism (15) controls strength of the field magnet between the rotor (13) and the stator (14) by making the rotor (13) approach or recede from the stator (14).