Apparatus for controlling an elevator to reduce vibrations creat

Details Apparatus for controlling an elevator to reduce vibrations creat Apparatus for controlling an elevator to reduce vibrations creat

1994-11-17

1996-08-06

Nappi, Robert

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes control for power source of drive-means

318799, 318801, 318807, 187293, 187289, B66B 134

Patent

active

055425011

ABSTRACT:
An apparatus for controlling an elevator capable of providing enhanced comfort to passengers by reducing and compensating for propulsion change and propulsion ripples, the apparatus comprising an acceleration sensor for detecting the moving acceleration of an elevation member, and a control circuit including a speed controller for generating an acceleration command to be issued to the elevation member in accordance with a speed deviation. An acceleration controller for generating a corrected propulsion command to be issued to the elevation member in accordance with an acceleration deviation between the acceleration command and the moving acceleration is provided and a electric power command generater for generating an electric power command to be issued to the inverter in accordance with the corrected propulsion command is also provided. In the described apparatus the moving acceleration is feedback-controlled by a control system having a high cut-off frequency so that an inverter electric command exhibiting excellent control responsiveness is generated.

REFERENCES:
patent: 3934125 (1976-01-01), Macano
patent: 4061089 (1977-12-01), Sawyer
patent: 4402386 (1983-09-01), Ficheux et al.
patent: 4738337 (1988-04-01), Caputo
patent: 4986391 (1991-01-01), Salmon
patent: 5076399 (1991-12-01), Horbruegger
patent: 5081593 (1992-01-01), Pollack
Patent Abstracts of Japan, 02-155405, Controller for Motor Diven Vehicle Aug. 31, 1990 Shiro Kurihara.

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