Monitoring equipment for the electrical supply system in a motor

Details Monitoring equipment for the electrical supply system in a motor Monitoring equipment for the electrical supply system in a motor

1980-06-10

1982-10-12

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

Specific condition

340 80, 340635, 340652, 340653, 322 99, G08B 1900

Patent

active

043541828

ABSTRACT:
Faulty excitation of the generator-regulator unit in the electrical system of a motor vehicle with resultant changes in the regulator output is indicated by the lighting of a light-emitting diode connected between the ignition switch and a Zener diode furnishing a constant reference voltage. A voltage divider is connected from the ignition switch to the negative battery terminal. One voltage divider tap is connected to the regulator input. When the regulator is underexcited, the voltage drop across the LED is sufficient to cause it to light. Alternatively, a first LED can be provided for indicating underexcitation of the generator and a second one for indicating overexcitation. For this purpose, the first LED is connected between the ignition switch and the regulator input terminal, while the second one is connected between the Zener diode and the regulator input terminal. Alternatively, the Zener diode in series with the second LED can be connected between the ignition switch and the negative battery terminal, while the first LED is connected between the ignition switch and the regulator input.

REFERENCES:
patent: 3944905 (1976-03-01), Allport et al.
patent: 4019120 (1977-04-01), Fattic
patent: 4240023 (1980-12-01), Masutani

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