Motor current based air circuit obstruction detection
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United States of America Patent
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Feb 28, 2012
Grant Date -
Jun 17, 2010
app pub date -
Dec 17, 2008
filing date -
Dec 17, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for determining an obstruction in an air circuit, the air circuit having a fan and a motor that drives the fan, includes the steps of obtaining a load current of a motor coupled to the air circuit, comparing the load current to a predetermined value, and determining the obstruction using the load current and the predetermined value.
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