Method and apparatus for automatic voltage reduction control

Details Method and apparatus for automatic voltage reduction control Method and apparatus for automatic voltage reduction control

1981-03-02

1982-08-24

Shoop, William M.

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

361 18, 361 65, G05F 114

Patent

active

043463410

ABSTRACT:
Automatic voltage reduction is provided by a voltage regulator by monitoring utility load currents and comparing the load currents to a predetermined current value. When the predetermined current value is exceeded, the voltage input to the voltage regulator control is increased by a fixed predetermined amount causing the voltage regulator output to decrease. One embodiment of the automatic voltage reduction control circuit utilizes a current transformer for receiving a signal from a utility line in proportion to the amount of line load current. The current signal is compared to a predetermined current value by means of a differential amplifier to determine when the predetermined current is exceeded. The differential amplifier output then operates a relay to connect an auxiliary voltage source in series with the sensing transformer within the voltage regulator control unit.

REFERENCES:
patent: 3039253 (1962-06-01), Van Hoesen et al.
patent: 3226628 (1965-12-01), Kupferberg et al.
patent: 3725771 (1973-04-01), Gilmore

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