Apparatus for operating an AC power elevator

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support

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Details

340 19R, 340 20, B66B 502

Patent

active

044783159

ABSTRACT:
An apparatus for operating an AC powered elevator which connects an elevator controller to a capacitor for supplying DC power to an inverter when the AC power is interrupted while the cage of the elevator is running, thereby continuing to operate the elevator controller and the cage of the elevator to bring the cage to a floor and open the door of the cage to permit passengers within the cage to be evacuated. Circuitry is also provided to prevent damage to the inverter while supplying the AC power from the capacitor to the AC motor.

REFERENCES:
patent: 3665277 (1972-05-01), Velazguez
patent: 3917029 (1975-11-01), Maynard
patent: 4019116 (1977-04-01), Klautschek
patent: 4165801 (1979-08-01), Watanabe et al.
patent: 4209082 (1980-06-01), Anzai et al.
patent: 4235309 (1980-11-01), Kuhl
patent: 4319177 (1982-03-01), Kawada et al.

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