MAGNET WORK MACHINE

PROBLEM TO BE SOLVED: To prevent incorrect detection caused in a magnet driving circuit.SOLUTION: A magnet work machine comprises: a magnet 5 for attaching/detaching a load; a generator motor 2 for generating electricity driven by an engine 1; a magnet driving circuit 4 for driving the magnet 5 usin...

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1. Verfasser: NAKAZUMI AKIRA
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To prevent incorrect detection caused in a magnet driving circuit.SOLUTION: A magnet work machine comprises: a magnet 5 for attaching/detaching a load; a generator motor 2 for generating electricity driven by an engine 1; a magnet driving circuit 4 for driving the magnet 5 using the generator motor 2 as a power source; and an electricity leakage detection device 6 for detecting an electricity leakage in the magnet driving circuit 4. The magnet driving circuit 4 is provided with a capacitor used as a storage device. The electricity leakage detection device 6 is configured to perform the leakage detection only between the time when a certain period of time has elapsed since detaching operation of the magnet 5 and the time when the next attaching operation starts.SELECTED DRAWING: Figure 1 【課題】マグネット駆動回路の漏電の誤検出を防止する。【解決手段】荷の吸着/釈放動作を行うマグネット5と、エンジン1により駆動されて発電機作用を行う発電電動機2と、この発電電動機2を電源としてマグネット5を駆動するマグネット駆動回路4と、このマグネット駆動回路4の漏電を検出する漏電検出装置6を備え、マグネット駆動回路4には蓄電装置としてのコンデンサが設けられ、漏電検出装置6は、マグネット5の釈放動作後一定時間経過し、かつ、次の吸着動作が開始されるまでの間のみに漏電検出を行うように構成した。【選択図】図1