| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor which is small in vibration and noise and is excellent in power efficiency. SOLUTION: A first power amplifier is switched at a high frequency, covering 180 deg., and a coil is supplied with a drive current in one polarity. A second power amplifier is turned on, covering 180 deg., and a coil is supplied with a drive current of the other polarity. Hereby, the power loss in the power amplifier is reduced, and the drive current to the coil is smoothed, and the rise of power efficiency and the reduction in vibration and noise are contrived. |
