Heating element temperature estimation apparatus
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United States of America Patent
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Jul 9, 2013
Grant Date -
Jul 14, 2011
app pub date -
Dec 20, 2010
filing date -
Jan 12, 2010
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Abstract
In an apparatus for estimating a temperature of a heating element such as IGBT mounted on an electronic printed circuit board, a first temperature and a second temperature at positions away from the heating element are detected, and it is determined whether a cooling device is operative. The temperature of the heating element is estimated based on the first and second temperatures using a first equation when the cooling device is inoperative, whereas it is estimated using a second equation when the cooling device is operative, thereby enabling to accurately estimate the temperature of the heating element equipped with the cooling device.
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