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).
Method for controlling port loading and unloading equipment to reduce loading and unloading time, and port loading and unloading equipment
09.09.2015
Patent
Elektronische Ressource
Englisch
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