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Title:
HYDRAULIC ELEVATOR SPEED CONTROLLER
Document Type and Number:
Japanese Patent JPH0977390
Kind Code:
A
Abstract:

To carry out follow-up of a car elevation speed detection value, in which a high frequency noise is reduced, with a car command, to convert the elevation speed of the car into an electric motor speed, and to feed back the electric motor speed detection value to a hydraulic pump driving electric motor speed controlling means so as to control the elevation with high precision.

On the basis of a deviation between a car speed command and a car speed detection value a high frequency noise component in car speed detection is reduced by a noise reducing means 11, and using this error signal, a car speed target value correcting signal is computed by a target value follow-up controlling means 12 so that the car speed follows the car speed command. A car speed target value generated by mean of a target value follow-up controlling means 12, an elevator characteristic change compensating means 18, a vibration suppressing means 19 is converted into an electric motor speed command by means of a speed converting means 13. To a hydraulic pump driving electric motor speed controlling means 14 to which the converted value is inputted, a hydraulic pump driving electric motor speed detection value detected by an electric motor speed detecting means 1 is fed back, and the electric motor speed can follow the hydraulic pump driving electric motor speed target value.


Inventors:
OHASHI HIROYUKI
Application Number:
JP23387395A
Publication Date:
March 25, 1997
Filing Date:
September 12, 1995
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
B66B1/04; B66B1/06; B66B1/24; F15B11/00; F15B11/04; (IPC1-7): B66B1/04; F15B11/00; F15B11/04
Attorney, Agent or Firm:
Takehiko Suzue



 
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