Monitoring circuit for a system for recharging a motor vehicle battery
First Claim
1. A monitoring circuit for a motor vehicle battery recharging system which comprises an electrical generator with an induction coil and a field coil, output of the generator being connected to terminals of a battery;
- the monitoring circuit comprisinga driver transistor having a collector-emitter path connected in series to the field coil of the generator and a direct current voltage source,field coil current sensor means for providing a signal indicative of current flowing during operation in the field coil, anddriver circuit means for driving said transistor as a function of voltage produced by the generator and the signal provided by said field coil current sensor means, said driver circuit means comprisinga detector circuit connected to a phase of the generator for providing a signal indicative of rotary speed of the generator, anda processing and comparison circuit coupled to said detector circuit for generating a signal for controlling conduction of current through said transistor so that current intensity flowing through the collector-emitter path of said transistor varies as a function of the rotary speed of the generator.
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Accused Products
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.
51 Citations
8 Claims
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1. A monitoring circuit for a motor vehicle battery recharging system which comprises an electrical generator with an induction coil and a field coil, output of the generator being connected to terminals of a battery;
- the monitoring circuit comprising
a driver transistor having a collector-emitter path connected in series to the field coil of the generator and a direct current voltage source, field coil current sensor means for providing a signal indicative of current flowing during operation in the field coil, and driver circuit means for driving said transistor as a function of voltage produced by the generator and the signal provided by said field coil current sensor means, said driver circuit means comprising a detector circuit connected to a phase of the generator for providing a signal indicative of rotary speed of the generator, and a processing and comparison circuit coupled to said detector circuit for generating a signal for controlling conduction of current through said transistor so that current intensity flowing through the collector-emitter path of said transistor varies as a function of the rotary speed of the generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- the monitoring circuit comprising
Specification