US 12,434,943 B2
Beam climber active brake health monitoring system
Randy Roberts, Hebron, CT (US); Edward Piedra, Chicopee, MA (US); Sam Thieu Wong, Bridgeport, CT (US); and James L. Hubbard, Kensington, CT (US)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by Otis Elevator Company, Farmington, CT (US)
Filed on Jul. 31, 2020, as Appl. No. 16/944,786.
Prior Publication US 2022/0033219 A1, Feb. 3, 2022
Int. Cl. B66B 5/00 (2006.01); B66B 5/16 (2006.01); B66B 7/04 (2006.01)
CPC B66B 5/0031 (2013.01) [B66B 5/0025 (2013.01); B66B 5/16 (2013.01); B66B 7/046 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An elevator system comprising:
an elevator car configured to travel through an elevator shaft;
a first guide beam extending vertically through the elevator shaft, the first guide beam comprising a first surface and a second surface opposite the first surface;
a beam climber system configured to move the elevator car through the elevator shaft, the beam climber system comprising:
a first wheel in contact with the first surface; and
a first electric motor configured to rotate the first wheel;
a first motor brake mechanically connected to the first electric motor, the first motor brake configured to slow the elevator car; and
a brake condition based monitoring system configured to detect when the first motor brake is dragging;
wherein the brake condition based monitoring system is configured to detect when the first motor brake is dragging based upon at least a torque of the first electric motor;
the elevator system further comprising a floor pressure sensor configured to determine a center of gravity of the elevator car, wherein the brake condition based monitoring system is configured to detect when the first motor brake is dragging based upon at least the torque of the first electric motor and the center of gravity.