Elevator system with independent limiting of a speed pattern...

B - Operations – Transporting – 66 – B

Patent

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364/33

B66B 1/28 (2006.01) B66B 5/10 (2006.01)

Patent

CA 2009001

A feedback controlled elevator system driven by a traction drive motor in response to a speed pattern provided by a car controller. The speed pattern is limited when the car approaches a terminal floor within a predetermined terminal slowdown zone adjacent to the terminal floor. A pattern limiting signal is provided in response to digital integration of shaft encoder signals which provides a digital position "x" of the car within a terminal zone. The position "x" of the car is then used to access a read-only-memory which contains the maximum car speed for the specific location of the elevator car. The value from the read-only memory is used to limit the speed pattern.

Système d'ascenseur à commande par rétroaction mû par un moteur d'entraînement par traction en réponse à une gamme de vitesses fournie par un contrôleur de cabine. La gamme de vitesses est limitée lorsque la cabine s'approche d'un palier extrême à l'intérieur d'une zone extrême prédéterminée voisine du palier extrême. Un signal limitant la gamme de vitesses est donné en réponse à l'intégration numérique de signaux d'un codeur de position angulaire qui fournit une position numérique << x >> de la cabine dans une zone palière. La position << x >> de la cabine est ensuite utilisée pour avoir accès à une mémoire morte qui contient la vitesse maximale de la cabine pour l'emplacement précis de la cabine d'ascenseur. La valeur tirée de la mémoire morte est utilisée pour limiter la gamme de vitesses.

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