| 摘要 |
PROBLEM TO BE SOLVED: To suppress occurrence of electric erosion according to a drive frequency.SOLUTION: A rolling bearing is used at a position within 1 m or less from a control circuit for controlling the drive frequency of an inverter motor to be in a range of 50 Hz or more and 4000 Hz or less. The rolling bearing includes a plurality of rolling bodies containing an insulative rolling body having an electric resistance value of 10&OHgr; cm or more. When the number of insulative rolling bodies is defined as P, the rotational frequency of the rolling bearing is defined as M rpm, and the drive frequency of the inverter motor is defined as F Hz, the rolling bearing satisfies P×M≥60F. |
