METHOD AND BRAKE CONTROLLER FOR CONTROLLING A BRAKE IN AN ELEVATOR SYSTEM
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United States of America
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Issued Date -
Mar 17, 2022
app pub date -
Dec 18, 2019
filing date -
Dec 18, 2019
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Abstract
A brake of an elevator system is controlled by a brake controller, the brake having an armature that is pulled by an electromagnet to release the brake from a braking position against a spring force into a release position, according to a method including the steps of: applying an initial electrical voltage to the electromagnet and measuring a current intensity then supplied to the electromagnet; and reducing the voltage applied to the electromagnet to a holding voltage in response to a detection of a typical time behavior of the measured current intensity, which detected behavior characteristically occurs when the armature moves from the braking position into the release position. The method allows the brake to be activated more quickly from a released state to a braking state in specific situations.
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