Current sensor using hall-effect device with feedback

Details Current sensor using hall-effect device with feedback Current sensor using hall-effect device with feedback

1987-10-13

1989-04-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324117R, 324251, 324 99R, 338 32H, G01R 1932, G01R 2108

Patent

active

048230758

ABSTRACT:
A current sensor for use with a conductor with known cross-sectional characteristics is an electronic circuit having a monolithic Hall-effect element disposed substantially perpendicular to the conductor first major surface. A conductive loop substantially encircles the element and is oriented such that its flux is substantially orthogonal to the element surface. An amplifier sets current flow in the loop responsive to minimization of the differential Hall voltage across element. The loop current, at null, will be related to the conductor current by the ratio of the conductor flux path length to the loop flux path length.

REFERENCES:
patent: 3422351 (1969-01-01), Pihl
patent: 4020294 (1977-04-01), Kitajewski et al.
patent: 4296410 (1981-10-01), Higgs et al.
patent: 4449081 (1984-05-01), Doemen
patent: 4616188 (1986-10-01), Stitt et al.
patent: 4682101 (1987-07-01), Cattaneo
patent: 4687994 (1987-08-01), Fulkerson et al.
"Hall Effect Current-Sense Module", by Arnold et al., IBM Tech. Disc. Bull., vol. 17, #11, pp. 3218-3219, 4/75.

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