Procedure and apparatus for controlling the hoisting motor of an elevator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 18, 2000
Grant Date -
N/A
app pub date -
Oct 28, 1997
filing date -
Jan 31, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the control of the hoisting motor (5) of an elevator, the output (25,125) of the motor drive is generated using a signal (23,127) proportional to the rotation of the hoisting motor as feedback signal during passages between floors. At or near a landing, the position of the elevator car (1) in relation to the landing (8) is measured using a sensor (10) placed on the elevator car, and the position signal (25,125) is utilized to produce a reference for controlling the hoisting motor.
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