METHOD FOR ESTIMATING A FREQUENCY OF A HARMONIC IN AN AC CURRENT PASSING TO/FROM AN AC MACHINE
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United States of America Patent
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Issued Date -
May 22, 2014
app pub date -
Nov 13, 2013
filing date -
Nov 19, 2012
priority date (Note) -
Abandoned
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Abstract
A method for estimating a frequency of a harmonic in an AC current passing to/from an AC machine. The method includes observing an AC current passing to/from an AC machine that includes a stator and a rotor; measuring phase fluctuations in the observed AC current; and using the measured phase fluctuations to estimate a frequency of a harmonic in the AC current. The method includes using the estimated frequency of the harmonic in the observed AC current to estimate a speed of the rotor of the AC machine. The method may be implemented by a controller, which may include a PC and/or a DSP.
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