Motor vehicle battery charging installation

Details Motor vehicle battery charging installation Motor vehicle battery charging installation

1979-01-24

1981-06-30

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 18, 361 20, 322 28, 322 99, H02H 720, G05F 158

Patent

active

042765773

ABSTRACT:
A motor vehicle battery charging installation includes an alternator/rectifier combination which is controlled by a voltage regulator and is connected to the battery. A warning lamp is connected in series with the collector-emitter of a control transistor across the battery. The voltage at the base of the control transistor is determined by a resistor/capacitor/diode network connected to the rectifier output and to a phase point of the alternator to turn the lamp on whereas the alternator is producing no output. A zener diode is connected to the rectifier output and to an auxiliary input of the regulator to take control should the connection between the alternator and the battery become interrupted. Current flow through this zener diode is detected by a second transistor with its collector-emitter parallel with the first-mentioned transistor so as overridingly to illuminate the lamp in the event of the zener diode becoming conductive.

REFERENCES:
patent: 3492559 (1970-01-01), Harris
patent: 3612982 (1971-10-01), Jones et al.
patent: 3942096 (1976-03-01), Itoh et al.
patent: 3942097 (1976-03-01), Itoh et al.
patent: 4023089 (1977-05-01), Arakane

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