A system and method for detecting a brake dragging during normal operation of a motor monitors torque at zero speed and at constant speed. For an inertial system acted upon by gravity, a value of torque required to maintain zero speed is approximately the same as a value of torque required to maintain operation at a constant speed. In an exemplary, elevator system, a motor drive determines the torque required to maintain zero speed operation of an elevator cab after a holding brake opens and before it begins controlling the motor to rotate. The motor drive again determines the torque required to maintain a constant speed and compares this value to the value of torque required to maintain zero speed. If the difference between the two values of torque is greater than a predefined threshold, then the motor drive determines that the brake is dragging and sets an error message.


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    Titel :

    SYSTEM AND METHOD OF DETECTING A DRAGGING BRAKE IN AN ELEVATOR APPLICATION


    Weitere Titelangaben:

    SYSTEM UND VERFAHREN ZUR ERKENNUNG EINER SCHLEPPBREMSE IN EINER AUFZUGSANWENDUNG
    SYSTÈME ET PROCÉDÉ DE DÉTECTION D'UNE PIÈCE DE FREIN TRAÎNANTE DANS UNE APPLICATION D'ASCENSEUR


    Beteiligte:
    BACKMAN JOHN A (Autor:in) / RADKE BRYAN (Autor:in) / ADAMS MARCUS (Autor:in)

    Erscheinungsdatum :

    26.03.2025


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B66B Aufzüge , ELEVATORS



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