Running control device for elevator

Application Number: 00117866
Application Date: 2000.04.30
Publication Number: 1273213
Publication Date: 2000.11.15
Priority Information: 1999/4/30 KR 15650/99
International: B66B25/00
Applicant(s) Name: Otis Elevator Co.
Inventor(s) Name: Zhang Zhe-Hao
Patent Agency Code: 11105
Patent Agent: huang min
Abstract An escalator which includes a power rectifier for converting a three-phase AC utility power into an AC power of variable voltage and variable frequency in order to control the operation speed of the escalator, a gear and a sprocket for running a footplate using rotatory force generated from the induction motor, a position detection for detecting the rotational position of the sprocket, and a control device for generating a vibration torque compensating current Irc in order to generated a torque in the direction opposite to an actual vibration torque according to the actual rotational speed Wr of the induction motor and the output signal of the position detector, in generating a pulse width modulation signal in order to control the driving of the power rectifier.