BRAKE, METHOD FOR DETERMINING ITS STATE, TRACTION MACHINE AND ELEVATOR SYSTEM
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United States of America Patent
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Issued Date -
Sep 8, 2022
app pub date -
Nov 11, 2021
filing date -
Mar 8, 2021
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Abstract
A brake, a method for judging its state, a traction machine, and an elevator system. The traction machine and the elevator system include the brake. The brake includes a moving plate, and a fixed element having a fixed position relative to a base of the brake, and the brake further includes a first solenoid coil and a first ferromagnetic body; the first solenoid coil is disposed on one of the moving plate and the fixed element, the first ferromagnetic body is disposed on the other of the moving plate and the fixed element, a relative position of the first solenoid coil and the first ferromagnetic body is set such that the inductance of the first solenoid coil can change with the distance between the moving plate and the fixed element.
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