Overload-protected and reference-voltage-loss-protected electron

Details Overload-protected and reference-voltage-loss-protected electron Overload-protected and reference-voltage-loss-protected electron

1995-12-29

1997-06-24

Stephan, Steven L.

Electricity: single generator systems

Automatic control of generator or driving means

Plural conditions

322 28, H02H 706

Patent

active

056420331

ABSTRACT:
An error amplifier feedback capacitor located between the signal output and the signal input of an error amplifier stage of a voltage regulator is removed, particularly preventing that charge stored on this capacitor should act through an overload protection circuit of a voltage regulator so protected so as to undesirably turn off the output driver (as if there was an overload) in an oscillatory manner, undesirably causing a "pulsing" or "hunting" upon the occasion(s) of high alternator field drive currents. Meanwhile, a new capacitor that is located across a leg of the input voltage divider stage of the voltage regulator and that is called a voltage divider capacitor, is substituted. The combined effect of the (i) removal and (ii) substitution substantially eliminates "ghosts", or such low frequency noise as is commonly called "commutator noise", in any voltage regulator, including those that are optionally protected against failure due to overload. Still furthermore, and separately and severally, a small resistance is introduced into a direct current discharge path present in certain voltage regulators protected against short circuits. This added resistance, in combination with the regulation feedback capacitor, introduces a small time delay to the initiation of shutdown in the event of a detected short circuit condition, thus helping prevent that normal noise, especially at high alternator field drive currents, should undesirably trigger short circuit shutdown of the voltage regulator.

REFERENCES:
patent: 4129819 (1978-12-01), Arendt
patent: 4280087 (1981-07-01), Kasiewicz
patent: 4658200 (1987-04-01), Kouge
patent: 4733159 (1988-03-01), Edwards et al.
patent: 5245271 (1993-09-01), Simmons
patent: 5325044 (1994-06-01), Bartol

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