Position control method for elevator

Details Position control method for elevator Position control method for elevator

1996-11-25

1999-04-27

Nappi, Robert E.

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

187394, B66B 128, B66B 134

Patent

active

058969500

ABSTRACT:
An improved position control method for an elevator by which the system does not receive any overload even when the speed pattern of the cage is changed while the cage is operated in accordance with the position error occurred. The method includes the steps of a first step for computing a running distance to a service floor when a passenger registers a call, generating a speed pattern in accordance with the distance computed, and operating a cage in accordance with the speed pattern, a second step for re-computing the running distance of the cage based on a position difference error when the position difference error occurs during the operation of the cage, and a third step for re-computing the speed pattern in accordance with the running distance computed in the second step.

REFERENCES:
patent: 4470482 (1984-09-01), Husson
patent: 4494628 (1985-01-01), Uherek et al.
patent: 4501344 (1985-02-01), Uherek et al.
patent: 4658935 (1987-04-01), Holland
patent: 4691807 (1987-09-01), Iwata
patent: 5035301 (1991-07-01), Skalski
patent: 5686707 (1997-11-01), Iijima

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