Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Patent
1982-10-01
1985-07-09
Levy, Stewart J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Magnetic saturation
324109, G01R 1900
Patent
active
045285020
ABSTRACT:
A current sensor, integratable with power switching and control circuitry on a common substrate and insulatable from current-carrying conductors, utilizes a piezoelectric element located between a pair of current-carrying conductors. The conductors carry a current flowing in the same direction, causing an attractive force therebetween to act upon the piezoelectric element and generate a voltage therein proportional to the square of the conductor currents. Use of a pair of sensors, each in a different portion of a half-bridge circuit, and associated electronics for providing a sensor output proportional to the instantaneous value of the sensed current, is also described.
REFERENCES:
patent: 3997839 (1976-12-01), Dreyfus et al.
Bajorek, C. H. et al, "A Permalloy Current Sensor", IEEE Transactions on Magnetics, vol. Mag. 12, No. 6, Nov. 1976.
Feng, J. S., "Dual Slope Magnetoresistive Current Sensor", IBM Technical Disclosure Bulletin, vol. 20, No. 2, Jul. 1977.
Baker Stephen M.
Davis Jr. James C.
General Electric Company
Krauss Geoffrey H.
Levy Stewart J.
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