| 摘要 |
PURPOSE:To sufficiently reduce a noise level and also reduce a cost by simplifying a structure to realize such low level noise. CONSTITUTION:In a motor comprising a stator 1 which is formed by providing a winding 3 to a stator core 2 and a motor drive circuit for feeding electrical power to the winding 3, a piezoelectric element is provided to teeth 4 of the stator core 2 and this piezoelectric element is vibrated in the reverse phase against vibration of tooth 4 generated when an electrical power is supplied to the winding 3. |
