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10. (WO2011011090) SYSTEM AND METHOD FOR GENERATOR PHASE SIGNAL MONITORING AND CONTROL

Pub. No.:    WO/2011/011090    International Application No.:    PCT/US2010/002093
Publication Date: Fri Jan 28 00:59:59 CET 2011 International Filing Date: Fri Jul 23 01:59:59 CEST 2010
IPC: G05B 11/01
Applicants: C.E. NIEHOFF & CO.
PATTERSON, Ciaran
Inventors: PATTERSON, Ciaran
Title: SYSTEM AND METHOD FOR GENERATOR PHASE SIGNAL MONITORING AND CONTROL
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.