An elevator rescue system allows an elevator car of an elevator to be moved in an emergency situation. The elevator includes an elevator motor acting on hoisting ropes by which the elevator car is suspended including at least one electro-mechanical brake and an encoder outputting a signal corresponding to its speed. The rescue system includes a back-up power source, a jerk monitoring circuit connected to the encoder and including a memory storing an upper threshold value for the derivative of car acceleration, a brake feed circuit controlled by the jerk monitoring circuit, and a release switch connected to the jerk monitoring circuit and/or to the brake feed circuit. The release switch activates the brake feed circuit to release the brake, and initiate the jerk monitoring circuit to compare the derivative of car acceleration derived from the encoder signal with the stored first upper threshold value, and forwards a control signal to the brake feed circuit to initiate/stop braking depending on the comparison result.


    Access

    Download


    Export, share and cite



    Title :

    Jerk limiting in elevator rescue system


    Contributors:
    KATTAINEN ARI (author) / NAKARI ARTO (author)

    Publication date :

    2019-04-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



    LIMITING VEHICLE DAMPER JERK

    JONSON AXEL / ALBINSSON ANTON | European Patent Office | 2022

    Free access

    Limiting vehicle damper jerk

    JONSON AXEL / ALBINSSON ANTON | European Patent Office | 2024

    Free access

    LIMITING VEHICLE DAMPER JERK

    JONSON AXEL / ALBINSSON ANTON | European Patent Office | 2024

    Free access

    RESCUE ELEVATOR SYSTEM

    ALEXANDER HUEHN / HEINER HOERSCH | European Patent Office | 2016

    Free access

    Rescue elevator system

    HUEHN ALEXANDER / HOERSCH HEINER | European Patent Office | 2017

    Free access