Elevator speed control apparatus

Details Elevator speed control apparatus Elevator speed control apparatus

1976-10-29

1978-11-07

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

041241010

ABSTRACT:
An elevator speed control apparatus is disclosed comprising: an ideal velocity generator for generating a velocity ideal for the cage to travel the distance to a floor the cage is to land; a velocity detector for detecting the velocity of the cage in motion; a comparator for comparing the actual cage velocity data supplied from the velocity detector with the ideal velocity data supplied from the ideal velocity generator; an acceleration setting device for setting an acceleration for the cage; an acceleration modifying device operated by the output of the comparator, for modifying the acceleration data supplied from the acceleration modifying device; a command velocity pattern generator for integrating with time the acceleration data supplied from the acceleration modifying device and thus generating a command velocity pattern; and a motor driving device for controlling the cage hoist driving motor according to the command velocity pattern; wherein an ideal cage velocity is maintained by modifying the acceleration data according to the output of the comparator.

REFERENCES:
patent: 3350612 (1967-10-01), Hansen et al.
patent: 3523232 (1970-08-01), Hall et al.
patent: 3774729 (1973-11-01), Winkler
patent: 3783974 (1974-01-01), Gilbert et al.

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