| 摘要 |
PURPOSE:To remove a vibration component by disturbance at the time of revolution at high speed by obtaining the differential value of speed error voltage and correcting a torque current command in response to the magnitude of the differential value. CONSTITUTION:A differentiating element 14 arithmetically operating slip to command speed omegac, the fluctuation section of error voltage Egamma, is mounted, and a torque-current command value corrected by the differential output result it is arithmetically operated. Accordingly, a torque current command is corrected at a current control means forming a torque current command, the pre-stage of a current control loop, thus removing a vibration component by disturbance at the time of revolution at high speed. |
