| 摘要 |
PURPOSE:To suppress the vibration of a load shaft having a low rigidity load by using a signal of the sum of a signal which is obtained by passing a motor armature current through a tertiary filter and a signal which is obtained by detecting the rotating speed of a rotational shaft of the motor as a rotating speed feedback signal of the load shaft. CONSTITUTION:The drive force of a rotational shaft 10 of a motor 8 is transmitted to the load shaft 12 of a load 3 through a reduction gear or accelerators 11a, 11b. A rotating speed detector 9 which is coupled to the shaft 10 of the motor detects the rotating speed of the shaft 10, and a detecting speed correcting circuit 26 which is composed by a tertiary filter outputs a speed correction signal by information of the rotating speed of the shaft 12 contained in the armature current 7. A speed correction signal and the rotating speed of the shaft 10 are added to obtain a speed feedback signal 2 of the shaft 12. A power amplifier 6 flows the current 7 to a motor 8 in response to the deviation signal 3 between the speed command 1 and the speed feedback signal 2. |
