FAULT DETECTION AND DIAGNOSIS
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United States of America Patent
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Issued Date -
Jul 28, 2016
app pub date -
Jan 5, 2016
filing date -
Jan 5, 2016
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A method of detecting a stator fault in a multi-phase current induction machine including the steps of: obtaining a respective frequency spectrum for each of the current phases in the induction machine; deriving, from each frequency spectrum, a value for the ITHD (Inverse current Total Harmonic Distortion) for the respective current phase; calculating an ITHD deviation value corresponding to the maximum deviation for the derived ITHD values; judging whether the calculated ITHD deviation value differs from a reference deviation value; and determining, in response to a positive judgement, that there is a stator fault.
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