Anticipatory power failure detection apparatus and method

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

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323299, 361 18, 361 92, G05F 146

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active

046582045

ABSTRACT:
An anticipatory power failure detection apparatus and method, for use in connection with power supplies providing a regulated voltage signal to an electronic load such as a computer, employing circuitry for determining whether a control signal, within the regulated power supply circuit, is in a saturation state. Upon detecting a saturation state for the control signal, circuitry signals that an input power failure is occurring. The regulated power supply system can be a switching-type voltage regulation control system, wherein a pulse-width modulated switching system controls the periodic input of energy to an energy-storage network which generates the regulated voltage output signal. A derivative of the error signal is periodically sampled for determining whether it is in the saturation state. The regulated power supply control signal will be in the saturation state when the unregulated input voltage supply is insufficient to maintain the regulated voltage signal at the specified optimum operating point.

REFERENCES:
patent: 4414598 (1983-11-01), Nowell
patent: 4439805 (1984-03-01), Tarleton
patent: 4517618 (1985-05-01), Frank
patent: 4535410 (1985-08-01), O'Mara
patent: 4594517 (1986-06-01), Cohen et al.

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