| 摘要 |
PURPOSE:To improve the stability at low speed time by presuming a motor speed from the output signal of torque detecting means and the output signal of a position detector as a speed feedback signal. CONSTITUTION:A speed controller 1 obtains a current command signal Ir in response to a speed command signal Nr and a speed feedback signal Nf from a speed presuming circuit 9. A current controller 2 controls a converter 5 in response to a deviation between the signal Ir and a current feedback signal If obtained by a current detector 7. When a DC motor 6 rotates and the variation in the rotating position becomes the prescribed value, an incremental encoder 8 outputs a pulse Pe. The circuit 9 calculates a feedback signal Nf according to the pulse Pe and the signal If. |
