| 摘要 |
PURPOSE:To always smoothly rise a stepping motor even when the target rotating speed is sequentially varied by providing lamping characteristic with an integrator. CONSTITUTION:The rise of an output voltage V15 is lamped by the operation of an integrator 14 only when becoming an input command voltage Vin and an output voltage V15, and the frequency of a frequency signal F22 outputted from a V/F converter 22 is gradually raised. Thus, the rotating speed is smoothly risen from the starting characteristic to throughing characteristic. Since it is controlled so that the voltage Vin and the output voltage V15 to a stepping motor 24 become always equal, it can be sufficiently remedied even if any variation in the input command voltage Vin occurs. |
