APPARATUS AND METHOD FOR REALIZING ELEVATOR SAFETY FUNCTIONS
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United States of America Patent
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Issued Date -
Jul 4, 2024
app pub date -
Nov 9, 2023
filing date -
Jan 3, 2023
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Abstract
A device and method for implementing an elevator safety function. A device for implementing an elevator safety function includes: a primary braking device configured to perform a holding brake operation when being de-energized; an auxiliary braking device configured to perform a holding brake operation when being de-energized; a safety function control unit selectively coupled with an elevator motor and configured to determine whether to activate the auxiliary braking device to perform the holding brake operation based on magnitude of back electromotive force of the elevator motor; and a switching device configured to couple the elevator motor with the safety function control unit after the primary braking device is de-energized.
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