System and method for generator phase signal monitoring and control
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United States of America Patent
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Apr 30, 2013
Grant Date -
Sep 27, 2012
app pub date -
Jun 8, 2012
filing date -
Jul 23, 2009
priority date (Note) -
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Abstract
A vehicle electrical system comprises a generator and a control device coupled with the generator and operable to protect the generator from catastrophic failure while providing the electrical load in the electrical system with sufficient electrical power. The control device determines a loss of symmetry between two alternating phase signals generated by a first and second phase windings of a single or multiple stator generator. In particular, the control device determines a first and second average values of two of the two or more alternating phase signals and either limits or ceases the total electrical output current of the generator, via a generator output power controller, when the first average value differs from the second average value by a predetermined value. The control device may alternatively be configured to generate an error signal without varying the generator's total electrical output current even in the event of a malfunction.
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