Patent ID: 6089355
Filing Date: 2000-07-18
Classification: B66B

Abstract:
In an elevator speed controller for moving a car up/down via a rope wound around a sheave comprising a mechanical system of a rope type elevator and driven by a motor, which is equipped with a car speed command value setting means for setting a car speed command value upon receipt of a starting command and a motor controller for controlling the motor speed following the car speed command value set by the car speed command setting means,the elevator speed controller comprising:a motor speed detecting means for detecting a motor speed;a car vibration detecting means for detecting a car vibration; anda car speed command value correcting means provided between the car speed command value setting means and the motor controller for correcting the car speed command value set by the car speed command value setting means according to a motor speed detected value detected by the motor speed detecting means and a vibration detected value detected by the car vibration detecting value detected by the car vibration detecting means so as to suppress the car vibration and supplying the corrected car speed command value to the motor controller;wherein the car speed command value correcting means comprises:a speed deviation computing means for computing a deviation of the motor speed detected value from the car speed command value;a first computing means for multiplying a speed deviation computed by the speed deviation computing means by a predetermined first constant and integrating an obtained value;a second computing means for multiplying a motor speed detected value detected by the motor speed detecting means by a predetermined second constant;a third computing means for multiplying a car vibration detected value detected by the car vibration detecting means by a predetermined third constant;a fourth computing means for subtracting the outputs of the second and third computing means from the output of the first computing means; anda fifth computing means for multiplying the output of the fourth computing means by a predetermined fourth constant and outputting an obtained value.