| 摘要 |
PROBLEM TO BE SOLVED: To eliminate requirement of an electric storage device and to attain increase of efficiency of an engine and reduction of an exhaust gas without paying sacrifice such as failure of response and energy loss by time lag until a rotational speed of the engine becomes a required rotational speed. SOLUTION: The crane system is provided with: an engine generator (5) for generating AC power; a drive inverter (20) for driving a motor (30); a controller (13) for controlling the drive inverter (20) and the engine generator (5); and a crane state detector (15) for detecting the state of a hung baggage. The controller (13) presumes consumed power of subsequent action using the action state of the motor (30) and the state of the hung baggage, and determines instruction of the rotational speed of the engine generator (5) based on the presumed consumed power. COPYRIGHT: (C)2010,JPO&INPIT
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