Speed control system of elevator

Details Speed control system of elevator Speed control system of elevator

1977-11-22

1979-01-30

Schaefer, Robert K.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 130

Patent

active

041367588

ABSTRACT:
In a speed control system of elevator, a first speed pattern being an integration of an acceleration pattern and a second speed pattern decreasing at a constant speed for the remaining distance till the stoppage point, are set up. The car is operated in accordance with the first speed pattern. When the car reaches the decelerating point, the car is operated in accordance with the first speed pattern before the first and second speed patterns are not coincident, and then in accordance with the second speed pattern after they are coincident. A comparator is provided to detect the difference between the first and second speed patterns. When the car reaches the deceleration point, the acceleration pattern is successively reduced stepwisely in accordance with the output of the comparator. The reducing of the acceleration pattern is integrated and the result of the integration is used as the first speed pattern.

REFERENCES:
patent: 3552524 (1971-01-01), Benjamin et al.
patent: 3670851 (1972-06-01), Shima
patent: 3759350 (1973-09-01), Caputo et al.
patent: 3893695 (1975-07-01), Rickert

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