| 摘要 |
PURPOSE:To eliminate the amplifying of the irregular speed by employing the gain and the amplitude coefficient of previous time unless the varying width of the speed exceed the prescribed value. CONSTITUTION:When an error voltage ERP and an amplitude are corrected by using an actual speed vs. gain table and the actual speed vs. amplitude coefficient relating to the actual speed as a table of a memory 106a, the gain and the amplitude coefficient of previous time are employed unless the varying width of the speed between the actual speed TSA detected this time and the actual speed detected at the previous time exceed the prescribed value. Thus, even if the load variation of the motor increases and the ripple of the speed feedback voltage increases, the irregular speed is not amplified. |
