CURRENT LEAKAGE DETECTOR OF CONSTRUCTION MACHINE
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United States of America Patent
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Issued Date -
Mar 10, 2011
app pub date -
Aug 20, 2010
filing date -
Sep 7, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a construction machine in which a motor is driven by battery power through an inverter in accordance with operation of an operating lever, current-leakage detection signal output means applies a voltage signal, which is adapted for detection of a current leakage, between DC buses connected to the battery and a body of the machine. The applied signal voltage is detected by signal detection means, and the occurrence or non-occurrence of a current leakage is determined based on a crest value of the detected voltage signal. When the operating lever is operated during the determination, the determination is suspended to prevent erroneous detection.
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