| 摘要 |
PROBLEM TO BE SOLVED: To reduce a shaft voltage to suppress the occurrence of electric corrosion in a bearing.SOLUTION: A motor includes a stator, a rotary body, a shaft fixed to the rotary body, a pair of bearings, a pair of brackets, and a conduction material for connecting the pair of brackets. When electrostatic capacitance A is capacitance generated between the shaft and the outermost peripheral surface to be the outermost periphery with respect to the shaft center of the rotary body, and electrostatic capacitance B is capacitance generated between a stator core and the conduction material, a relation between the electrostatic capacitance A and the electrostatic capacitance B is 0.50A≤B≤3.08A at a measuring frequency of 10 kHz. |
