Current sensor and method utilizing multiple layers of thin film

Details Current sensor and method utilizing multiple layers of thin film Current sensor and method utilizing multiple layers of thin film

1989-08-24

1990-11-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324117R, 324244, 250225, 356368, G01R 3100, G01B 1100

Patent

active

049738992

ABSTRACT:
A sensor (1) for sensing the magnitude of current flowing in a conductor (12) based upon the Faraday effect. The sensor (10) includes a light source (14) for emitting a beam of light which is transmitted through the magneto-optic material (28) with one or more layers which causes a rotation of the plane of polarization of the light beam in proportion to the current flowing in the conductor (12). The beam of light with the rotated plane of polarization is split by a beam splitter (38) into two components which are then processed to produce an outputs (62, 63) indicative of the AC and DC components of the current flowing in the conductor. The outputs (62, 63) produced are independent of system losses.

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