Watt meter providing electrical signal proportional to power

Details Watt meter providing electrical signal proportional to power Watt meter providing electrical signal proportional to power

1977-02-28

1978-02-14

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

364483, 364841, 328160, G01R 700

Patent

active

040741940

ABSTRACT:
A watt meter circuit capable of providing an electrical signal indicative of power includes a signal forming means for providing a pair of signals proportional to current. The signals are equal to each other in magnitude but opposite in polarity and are provided in parallel through a switch to filter which provides the electrical power signal. The switch is operated by a signal generating means which generates a triangular wave form. The voltage to the watt meter is compared with the triangular wave form to vary the duty cycle of the switch and the magnitude and polarity of the output signal in accordance with the algebraic product of voltage and current.

REFERENCES:
patent: RE29079 (1976-12-01), Gilbert
patent: 3470471 (1969-09-01), Moore
patent: 3588713 (1971-06-01), Yareck
patent: 3942110 (1976-03-01), Milkovic

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