Short protection device for alternator
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United States of America Patent
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-
Apr 12, 2011
Grant Date -
Jul 2, 2009
app pub date -
Jun 12, 2008
filing date -
Dec 28, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A short circuit protection device for the protection of an alternator in which turning on/off a trigger switch causes conduction/cutoff of the field current of the field coil of the alternator is disclosed. The protection device enables the field current to pass through a sensor so that when the field current is abnormally high and the voltage drop across the sensor rises, the potential of an input end of a boost circuit electrically connected to the sensor correspondingly arises and an output end of the boost circuit electrically connected to a shutoff device drives the shutoff device to turn off the trigger switch, and the boost circuit further keeps the shutoff device in on-state to hold the trigger switch off till the short circuit condition is eliminated and the protection circuit system is reset.
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