MOTOR AND TEMPERATURE RISE SUPPRESSING METHOD OF BEARING

摘要

PROBLEM TO BE SOLVED: To provide a motor which can prevent a rise of a temperature of a bearing (motor bearing) by a simple structure, and can prolong the lifetime of the bearing by preventing the rise of the temperature, and to provide a temperature rise suppressing method of the bearing.;SOLUTION: In the motor A which comprises a rotating shaft 10, a cylindrical rotor 1 fixed to the rotating shaft 10, a stator 20 arranged so as to oppose the external peripheral face of a rotor 1, and the bearings 30A, 30B for rotatably supporting the rotating shaft 10, the motor is such that annular recesses 2b, 2c are formed, at least at one of end faces 2B, 2C of the rotor 1 along the external periphery of the rotating shaft 10.;COPYRIGHT: (C)2010,JPO&INPIT