The invention relates to a method for monitoring brakes of a multi-brake hoisting machinery (2), the method comprising performing a test sequence (100), wherein the test sequence comprises: holding (101) at least one brake unit (5) in the open position while holding the rest of the brake units (5) in the closed position; and ramping (102;102') up a test torque with the motor (3), or alternatively ramping (102') down a test torque with the motor (3); and monitoring (103) movement of a component of the hoisting machine during the ramping up or down (102;102'), respectively, said component preferably being the rotor of the motor (3) or the drive member (4); and detecting (104) starting of movement of the component or that amount of movement exceeds a limit amount during the ramping up or down (102;102'), respectively; and registering (105) the magnitude of the test torque (Ttest) at the moment when the movement started or exceeded a limit amount. The method comprises repeating (200) the performing (100) a test sequence one or more times with a new test configuration, the combinations of brake units (5) held in open position and in closed position being different in the test sequences; and determining (300) an individual braking torque (Ti) of each individual brake unit (5) based on the registered magnitudes of test torques (Ttest), and determining (400) and/or predicting condition of the brake units (5) based on said individual braking torques. The invention also relates to an elevator arrangement (1) implementing the method.


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    Title :

    METHOD FOR MONITORING ELEVATOR BRAKES AND ELEVATOR ARRANGEMENT


    Additional title:

    AUFZUGSBREMSENÜBERWACHUNGSVERFAHREN UND AUFZUGSANORDNUNG
    PROCÉDÉ DE SURVEILLANCE DES FREINS D'ASCENSEUR ET AGENCEMENT D'ASCENSEUR


    Contributors:

    Publication date :

    2024-10-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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