| 摘要 |
PURPOSE:To eliminate a steady-state phase deviation by a method wherein a phase control system is constituted by a loop composed of a position detecting means, a phase comparator, a reference signal generating means, a digital filter and so forth. CONSTITUTION:The position signal of a motor 1 is picked up by a position detecting means 7 and the position signal (PG signal) is inputted to a phase comparator 8. A reference phase signal outputted by a reference phase signal generating means 9 is inputted to the phase comparator 8. The output of the phase comparator 8 is inputted to a digital filter 10 for low-frequency range compensation. The digital filter 10 transmits the filtered output to an output correcting means 11. The output correcting means 11 corrects the output data of the digital filter 10 in accordance with the overflow detecting signal of the digital filter 10. A phase control system is constituted by the above mentioned loop and eliminates the steady-state phase deviation of the phase control system. Further, a steady-state speed deviation can also be eliminated. |
