Otis Elevator Company

Michael T Barten

Mustapha Toutaoui

Helmut L Schroder-Brumloop

Christoph M Ernecke

Rudiger Lob

An automatic sliding door operator includes a top door operator and a bottom door operator, each operator having a motor driven sprocket driving a tooth belt to which the sliding doors are attached, the motors being separately driven in a position-synchronized fashion in response to related encoders connected with each motor to provide positional information.

Double-drive automatic sliding door operator

A method for adjusting an elevator door includes the steps of selecting an elevator door adjustment task from a task list which is provided by an elevator door controller. The elevator door controller is adapted to control the phase, voltage and torque of an elevator door motor. The controller is provided with an elevator door adjustment program which is adapted to provide a set of program prompts to a service person who inputs elevator door parameters in response to the set of program prompts. The parameters are then stored in a memory accessible to said elevator door controller the elevator door in thereafter controlled in accordance with the inputted parameters.

Method for adjusting an elevator door

The present invention solves the problem of discontinuous operation of an elevator door, depending upon the operating point of the door at the time of the reversal command, by a digital control technique which uses as a reference signal for the adaptation, the velocity dictation coming from a profile generator. This gives an information concerning the actual operating point. The adaptation of the controller parameters is made with respect to the signal.

Adaptive digital velocity control loop for a high performance elevator

In response to requested flight time, creep in distance, creep out distance and creep speed, a profile for opening or closing an elevator door is provided. The distance over which acceleration and deceleration must occur is the doorway distance less the distance which would be covered at the creep speed. Maximum speed is the acceleration distance over the acceleration time (1/4 of the requested flight time, to allow for jerk to both increase and decrease both acceleration and deceleration). Acceleration is the maximum speed over the acceleration time, and jerk is acceleration over the acceleration time. Actual flight time is calculated, taking into account maximum acceleration and velocity, and periods of constant acceleration and velocity, if any.

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Berlin, Germany

Michael T Barten