Power supply failure early warning detector

Details Power supply failure early warning detector Power supply failure early warning detector

1982-07-06

1985-08-13

Krass, Errol A.

Boots, shoes, and leggings

340663, 361 92, 361110, 364481, G06F 1520, G06G 762, G08B 2100

Patent

active

045354103

ABSTRACT:
Apparatus for detecting, in advance, by a desired length of time, the imminent failure of electric output power provided by an electric power supply due to the reduction or loss of input power. The magnitude of the voltage on an energy storage reservoir capacitor is monitored for deriving a voltage signal proportional to the rate of change thereof. The rate of change voltage is multiplied by a voltage proportional to a desired early warning time interval and this product is added to a voltage proportional to a minimum value of voltage on the capacitor, thus representing an amount of stored energy sufficient to sustain normal output power for a desired time interval. The voltage derived by the adding means is compared with the voltage on the energy storage capacitor for signalling imminent power supply failure when the compared voltages are equal.

REFERENCES:
patent: 3914667 (1975-10-01), Waldron
patent: 4117526 (1978-09-01), Bates
patent: 4428020 (1984-01-01), Blanchard, Jr.

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