Speed control apparatus for elevator system

摘要

A speed control apparatus for elevator system which controls a speed of a cage through a main rope under controlling a motor by a speed control system comprising an acceleration feedback circuit, comprises a detection circuit for detecting a speed or a position of the cage which is vibrated under corresponding a frequency of an outer disturbance to a resonance frequency of the main rope and a command circuit for increasing a gain of the acceleration feedback circuit by the output of the detection circuit.