| 摘要 |
<p>Power supplies minimize any net torque and/or vibration produced on a drive assembly. The power supplies (18) are especially usefully employed in operative association with a drive assembly having a drive magnet assembly (23). Most preferably, the power supplies are embodied in a control circuit which controls the angular velocity of a drive assembly (e.g. the motor (26) and the drive magnet assembly) so that its angular velocity is maintained at a constant level. A control circuit is most preferably capable of quickly adjusting the angular velocity of the drive assembly back to the constant level if the rotational speed of drive assembly were to deviate therefrom because of, for example, a force load imposed on the drive assembly. Such an adjustment is most preferably accomplished in less time as compared to the time required for one rotation of the drive assembly to thus minimize any net torque and/or vibration thereon.</p> |
