Apparatus and method for detecting fault of cooling fan
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United States of America Patent
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N/A
Issued Date -
Jun 2, 2005
app pub date -
Sep 30, 2004
filing date -
Dec 1, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus for detecting a fault of a cooling fan includes an electronic switch connected to a negative (-) power input terminal of a cooling fan and turning on/off the cooling fan; a current detector connected to the electronic switch and detecting a current value of the cooling fan; an analog filter for filtering the detected current value; and a controller for converting the filtered current value into a digital current value and determining whether the cooling fan is improperly operated based on the converted digital current value and a pre-set upper threshold value and lower threshold value.
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