Monitoring circuit for a system for recharging a motor vehicle b

Details Monitoring circuit for a system for recharging a motor vehicle b Monitoring circuit for a system for recharging a motor vehicle b

1992-04-13

1993-10-19

Peckman, Kristine L.

Electricity: single generator systems

Automatic control of generator or driving means

Speed or frequency of generator

322 28, 322 99, 320 64, H02J 714

Patent

active

052549356

ABSTRACT:
A monitoring circuit for an electrical generator for recharging a motor vehicle battery. The monitoring circuit includes a driver transistor, a field coil current sensor, and driver circuit. The collector-emitter path of the driver transistor is connected in series to the field coil of the generator and a direct current voltage source. The field coil current sensor provides a signal indicative of the current flowing in the field coil. The driver circuit drives the transistor as a function of the voltage produced by the generator and the signal provided by the field coil current sensor. The driver circuit includes a detector circuit and a processing and comparison circuit. The detector circuit is connected to a phase of the generator and provides a signal indicative of the generator's rotation speed. The processing and comparison circuit is coupled to the detector circuit and generates a signal for controlling the conduction of current through the transistor so that the intensity of the current flowing through the collector-emitter path of the transistor varies as a function of the generator's rotation speed.

REFERENCES:
patent: 4024456 (1977-05-01), Sato et al.
patent: 4477766 (1984-10-01), Akita et al.
patent: 4629968 (1986-12-01), Butts et al.
patent: 4636706 (1987-01-01), Bowman et al.
patent: 5061889 (1991-10-01), Iwatani et al.
patent: 5132608 (1992-07-01), Boella et al.

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