Elevator braking in a battery powered elevator system

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United States of America Patent

PATENT NO 9586789
APP PUB NO 20160194179A1
SERIAL NO

14911378

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Abstract

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An elevator system includes a battery; a machine having a motor to impart motion to an elevator car; an inverter having a plurality of switches to convert DC power from the battery to AC power for the machine in a motoring mode; a speed sensor coupled to the machine, the speed sensor to generate a speed signal indicative of machine speed; and a controller to apply braking signals to a group of the switches in a braking mode, the braking signals having a duty cycle in response to the speed signal.

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Patent Owner(s)

Patent OwnerAddress
OTIS ELEVATOR COMPANYONE CARRIER PLACE FARMINGTON CT 06032

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Agirman, Ismail Southington, US 73 327
Marvin, Daryl J Farmington, US 73 601

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