Low cost self-contained transformerless solid state electronic w

Details Low cost self-contained transformerless solid state electronic w Low cost self-contained transformerless solid state electronic w

1985-09-09

1988-06-28

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324111, 324117R, 324 96, 364483, G01R 2106, G01R 100, G01R 3300

Patent

active

047542195

ABSTRACT:
A transformerless, self-contained, low cost, small size, light weight solid state electronic watthour meter is described which employs thin film ferromagnetic current sensors of the type which are magnetically coupled to power conductors whose current flow is to be sensed and metered and which provides electrical isolation between the power conductors and the sensing and metering circuitry. The meter is self-contained in that it draws its operating direct current supply potential required to operate the meter directly from the power conductors being metered and does not require a separate battery or transformer coupled direct current power source. The entire meter circuitry, including the thin film ferromagnetic current sensors which can be fabricated by thin film technology and the direct current power supply and the watthour meter circuitry, all are susceptible of fabrication on a single substrate using semiconductor integrated circuit fabrication techniques.

REFERENCES:
patent: 3461384 (1969-08-01), Bayati et al.
patent: 3947763 (1976-03-01), Milkovic
patent: 3976942 (1976-08-01), Mayfield
patent: 4066960 (1978-01-01), Milkovic
patent: 4092592 (1978-05-01), Milkovic
patent: 4296413 (1981-10-01), Milkovic
patent: 4414510 (1983-11-01), Milkovic
patent: 4437059 (1984-03-01), Hauptmann
patent: 4464625 (1984-08-01), Lienhard et al.
Bowen et al.; "Magnetoresistive Current Sensor"; IBM Technical Disclosure Bulletin; vol. 17, No. 3, Aug. 1974; pp. 728-729.

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