Elevator power source device

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

187119, 318807, B66B 130

Patent

active

050587102

ABSTRACT:
A simplified elevator power system using an AC-DC converter, both to convert AC to DC during normal operation and to convert stored DC power to AC during power failures. A power source monitoring relay monitors AC power coming from a utility, and upon power failure, switches a battery from a charging mode to a power source mode wherein DC power is supplied, not only to an inverter for driving a motor, but also to a converter hooked up to run as an inverter during such power failure in order to provide stepped-up AC voltage to elevator control devices. In this way, the prior art addition of an extra inverter is avoided.

REFERENCES:
patent: 4503938 (1985-03-01), Nomura
patent: 4516665 (1985-05-01), Watanabe
patent: 4548299 (1985-10-01), Nomura
patent: 4554999 (1985-11-01), Kamaike
patent: 4666020 (1987-05-01), Watanabe
patent: 4779709 (1988-10-01), Mitsui et al.

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