Otis Elevator Company

HengFeng Xie

Shan Li

Donald F Cominelli

Uwe Schoenauer

Xiaolin Harry Wang

A detection method for elevator brake moment solves the problems that operation of the brake detection device in the prior art is required to be manually executed, the brake detection device is not convenient and facilitative to operate, the function is singular and the brake moment change trend and the brake wear trend cannot be reflected. In the method, by inputting stagewise torque current to the motor and determine whether the torque during rotation of a motor is within the design moment range of a brake, whether torque of the brake is enough can be determined and the brake wear trend can be analyzed according to torque recorded at each time. The method has advantages that the automatic detection is performed periodically, the functions are diversified, the detection accuracy is high, the brake moment change trend can be reflected and the brake wear trend can also be reflected.

Detection method for elevator brake moment

An elevator system () includes an elevator hoistway () having a plurality of landings (), an elevator car () configured to move within the elevator hoistway (), and a position determining system () having a plurality of landing position indicators () and a plurality of dummy position indicators (). At least one of the landing position indicators () is mounted proximate to each of the plurality of landings (). Each dummy position indicator () is mounted within the elevator hoistway () at a predetermined vertical position between various of the plurality of landing position indicators (). The position determining system () additionally includes a sensor () configured to determine when the elevator car is adjacent one of the plurality of landing position indicators () or one of the plurality of dummy position indicators (). The plurality of landing position indicators () and the plurality of dummy position indicators () are positioned to form a sequence of unique patterns. The position determining system is more cost effective and timesaving than the absolute position reference systems.

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Hangzhou, China

HengFeng Xie