| 摘要 |
<p>An apparatus for controlling a motor speed of an elevator, capable of efficiently restraining a vibration occurring at a cage, comprises a subtractor for deriving a signal indicative of a difference between a speed detecting signal and a speed command signal, a proportional integrator 112 for proportionally integrating an output signal from the subtractor, a notch filter 113 for removing a particular frequency component from an output signal from the proportional integrator and outputting the signal free of the particular frequency component as a motor speed control signal, and a vibration control circuit 114 for varying a constant of a transfer function of the notch filter, based on a position of a cage equipped in the elevator and a load of the cage. The speed detecting signal is generated by a speed detector for detecting a rotation speed of a sheave and the speed command signal is generated by the vibration control circuit. <IMAGE></p> |
