Electronic watthour meter

Details Electronic watthour meter Electronic watthour meter

1982-04-05

1985-03-12

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324117R, G01R 2106, G01R 3300

Patent

active

045047871

ABSTRACT:
An electric watthour meter for measuring AC power consumption is disclosed which includes a pair of parallel plate bus bars through which all of the power to be measured is conducted, a magnetoresistive bridge sensor disposed between the pair of bus bars such that the flow of current in either or both of said bus bars produces a corresponding voltage signal from the sensor indicative of the total amount of current flowing in the bus bars and a signal processing system for utilizing the signal from the sensor to produce an output indicative of the total AC power conducted by the bus bars.

REFERENCES:
patent: 3323056 (1967-05-01), Haley
patent: 3546579 (1970-12-01), Paul et al.
patent: 3716781 (1973-02-01), Almasi et al.
patent: 3848217 (1975-02-01), Lazzari
patent: 3864751 (1975-02-01), Beaulieu et al.
patent: 3945038 (1976-03-01), Lazzari
patent: 4024489 (1977-05-01), Bajorek et al.
patent: 4048557 (1977-09-01), Chen
patent: 4075671 (1978-02-01), Cheatham et al.
patent: 4097802 (1978-06-01), Mahopac
Sun, S. F., "Theory and Applications . . . "; Solid State Electronics; vol. 7; 1964; pp. 363-371.
C. H. Bajorek et al., "A Permalloy Current Sensor", IEEE (obscured), Nov. 1976, pp. 813-815.
Yu Jen Wong et al., Function Circuits Design and Applications, McGraw-Hill, N.Y., 1977, pp. 280-281.

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