Fault indicator for motor vehicle battery charging systems

Details Fault indicator for motor vehicle battery charging systems Fault indicator for motor vehicle battery charging systems

1976-04-02

1977-04-19

Hickey, Robert J.

Electricity: single generator systems

Automatic control of generator or driving means

Voltage of generator or circuit supplied

322 99, 324158MG, 340248Y, 340249, H02J 724, G08B 2100, G01R 3102

Patent

active

040191206

ABSTRACT:
A fault indicator for a motor vehicle battery charging system of the type in which a diode-rectified alternating current generator supplies charging current to the vehicle battery and supplies other loads on the vehicle. The fault indicator is capable of detecting certain faults in the diode-rectified alternator and is capable of detecting certain faults in the generator voltage regulating system. The fault indicator system utilizes current difference operational amplifiers, one of which is connected to detect sharp negative voltage transitions caused by certain faults in the system. The fault indicator also has Zener diodes connected to provide an indication of faults that cause abnormally low or high voltage outputs of the diode-rectified alternator such as an open or shorted voltage regulator. The signal indicator utilized is a light emitting diode and the fault indicator circuit is arranged so as to cause continuous illumination of the light emitting diode under certain fault conditions and a blinking of the light emitting diode during other fault conditions.

REFERENCES:
patent: 3289065 (1966-11-01), Dehmelt
patent: 3467853 (1969-09-01), Harland, Jr. et al.
patent: 3538362 (1970-11-01), Cheetham et al.
patent: 3629704 (1971-12-01), Stevens
patent: 3656135 (1972-04-01), Ruff
patent: 3893029 (1975-07-01), Vensel et al.
patent: 3927399 (1975-12-01), Fuzzell
patent: 3936744 (1976-02-01), Perlmutter

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