Electrical current sensor

Details Electrical current sensor Electrical current sensor

1985-08-05

1987-11-10

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

336175, 336200, 336216, H01F 4006

Patent

active

047060174

ABSTRACT:
A compact and inexpensive current sensor includes a planar coil assembly mounted, as by printing, on a substrate such as a circuit board. A closed-loop flux concentrator extends through the coil and also through the board. A conductor carrying the AC current to be sensed is positioned in proximity with the flux concentrator. The flux concentrator is of one-piece construction, having a pair of opposed leg portions in overlapping relation and fastened to the circuit board. A current-summing amplifier amplifies the low-amplitude emf provided by the coil assembly and, with further circuitry, provides an indication and/or control commensurate with the sensed current being above or below some value.

REFERENCES:
patent: 3465274 (1969-09-01), Proctor
patent: 4048605 (1977-09-01), McCollum

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