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.


    Access

    Download


    Export, share and cite



    Title :

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


    Additional title:

    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


    Contributors:
    BACKMAN JOHN A (author) / RADKE BRYAN (author) / ADAMS MARCUS (author)

    Publication date :

    2025-03-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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

    BACKMAN JOHN / RADKE BRYAN / ADAMS MARCUS | European Patent Office | 2022

    Free access

    System and Method of Detecting a Dragging Brake in an Elevator Application

    BACKMAN JOHN A / RADKE BRYAN / ADAMS MARCUS | European Patent Office | 2022

    Free access

    METHOD FOR MONITORING BRAKE DRAGGING OF AN ELEVATOR

    CALCAGNO ALESSIO / JOKINEN MARKKU / KATTAINEN ARI et al. | European Patent Office | 2021

    Free access

    Elevator dragging system

    ZHANG JIANJUN | European Patent Office | 2022

    Free access

    A METHOD FOR MONITORING BRAKE DRAGGING OF AN ELEVATOR

    CALCAGNO ALESSIO / JOKINEN MARKKU / KATTAINEN ARI et al. | European Patent Office | 2021

    Free access