Field coil fault detector for automotive alternator battery...

Details Field coil fault detector for automotive alternator battery... Field coil fault detector for automotive alternator battery...

H - Electricity

02

J

320/12

H02J 7/14 (2006.01) G01R 31/00 (2006.01) G01R 31/06 (2006.01) G01R 31/34 (2006.01)

Patent

CA 1150350

Abstract A detector monitoring the operational status of the field coil circuit in a multiphase alternator and voltage regulator battery charging system is disclosed. Circuit means monitor a first signal at a first terminal of the field coil circuit. Means generate sampling intervals on a repetitive basis. Circuit means interrupt the excita- tion signal supplied to the field coil by the voltage regulator during the sampling intervals. A second signal is measured during sampling intervals at a second termi- nal of the field coil circuit. Comparator means compare the first and second signals and produce an output signal when the comparison varies from a predetermined value.

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