Temperature abnormality detection method for power conversion apparatus, and temperature abnormality detection device for power conversion apparatus
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United States of America Patent
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Aug 11, 2020
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Jun 11, 2020
app pub date -
May 27, 2016
filing date -
May 27, 2016
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Abstract
A temperature abnormality detection method for a power conversion apparatus basically includes a detecting a first power converter temperature, a second power converter temperature and a cooling water temperature and then determining a presence of an abnormality in a preceding stage power converter based on a first temperature difference between the first power converter temperature and the cooling water temperature. The abnormality detection method further includes determining a presence of an abnormality in a subsequent stage power converter based on a second temperature difference between the second power converter temperature and an added temperature that is obtained by adding to the loss component of the preceding stage power converter converted to a temperature to the cooling water temperature.
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