The present invention reduces loading and unloading time without changing the amount of power consumed by way of controlling a motor (22) of a crane (10) so as to raise or lower a container (C1), regardless of the load (W1) of the container (C1), at a fixed first acceleration by way of a first maximum torque (Tm) that is the maximum torque of a constant torque region (A2), from the start of raising or lowering the container (C1) until reaching a standard speed (V0), and to raise or lower at a second acceleration, that varies at a fixed interval by way of a calculated second torque, from the standard speed (V0) to a maximum speed (Vmax) calculated from the load (W1), by calculating, at a predetermined fixed time interval, the second torque that is the difference between a holding torque (Tw) and a second maximum torque (Tv) that is the maximum torque inversely proportional to a speed (V1); determined by the constant torque region (A2).


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    Title :

    Method for controlling port loading and unloading equipment to reduce loading and unloading time, and port loading and unloading equipment


    Contributors:

    Publication date :

    2015-09-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES / B66D Haspeln , CAPSTANS



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