Emergency elevator power supply with component mode...

Details Emergency elevator power supply with component mode... Emergency elevator power supply with component mode...

B - Operations, Transporting

66

B

364/23

B66B 1/00 (2006.01) B66B 1/34 (2006.01) H02H 9/06 (2006.01)

Patent

CA 2023283

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.

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