There is provided a slewing control device (13) that enables to detect breakdown of a driving system of a mechanical brake (4), and generate a torque for holding a slewing body in a stopped state to thereby prevent movement of the slewing body when an anomaly has occurred. In a working machine for driving a slewing body by an electric motor (1), judgment is made as to whether a mechanical brake (4) is in an inconsistent state, based on a command to be outputted to a brake circuit (B), and a pressure detected by a brake pressure sensor (17). The inconsistent state is a state that the mechanical brake (4) is in a brake released state when an activation command for switching the mechanical brake (4) to a brake activated state is outputted. If it is judged that the mechanical brake (4) is in the inconsistent state, a command for obtaining a braking torque for holding the slewing body in a stopped state is outputted to the electric motor (1).


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    Title :

    Slewing control device and working machine incorporated with the same


    Additional title:

    Drehwerkssteuerungsvorrichtung und Arbeitsmaschine damit
    Dispositif de commande de giration et machine de travail dotée de celui-ci


    Contributors:

    Publication date :

    2017-05-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    E02F Baggern , DREDGING / B66C Krane , CRANES / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen



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