Wide frequency multi-phase undervoltage detection circuit

Details Wide frequency multi-phase undervoltage detection circuit Wide frequency multi-phase undervoltage detection circuit

1983-10-11

1985-03-26

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 90, 340663, H02H 324

Patent

active

045077134

ABSTRACT:
A multi-phase undervoltage detection circuit is disclosed wherein a multi-phase input voltage is compared to a reference. If the peak level of the input voltage is above the reference, a capacitor is discharged. If the voltage of any one of the phases is below the reference, the capacitor charges above the level of the input to a flip-flop. At the same time the voltage of another of the phases clocks the flip-flop. Since the input of the flip-flop is "high" when it is clocked, it changes states and its output goes "low" which provides a circuit output indicative of an undervoltage condition. If no undervoltage condition exists, the flip-flop will not change states and the circuit output is indicative of a non-undervoltage condition.

REFERENCES:
patent: 3401308 (1968-09-01), Darke
patent: 3611162 (1971-10-01), Tochitani
patent: 3636541 (1972-01-01), Genuit et al.
patent: 3716718 (1973-02-01), Nowell

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