Current- and voltage-measurement transducer

Details Current- and voltage-measurement transducer Current- and voltage-measurement transducer

1980-04-07

1982-12-07

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324127, 324249, 336212, G01R 120, G01R 3300, H01F 100

Patent

active

043629903

ABSTRACT:
A transducer for measuring a current, includes a magnetic core which has a gap substantially impeding passage of any magnetic flux, a coil arranged to pass a premagnetizing current for producing a first magnetic field, a loop for carrying the current to be measured, so as to produce a second magnetic field, and a magnetic field comparision device exposed to the magnetic fields. The magnetic field comparison device includes a magnetic film bridging the flux gap. The film is alternately controllable in respective opposite directions of saturation substantially by the first magnetic field, and evaluates the measuring current in dependence of the magnetic fields. The magnetic core, the coil, the loop, and the magnetic film are substantially disposed concentrically.

REFERENCES:
patent: 2608610 (1952-08-01), Thulin
Reference Data for Radio Engineers; Howard W. Sams & Co., Inc., N.Y., N.Y.; pp. 13-21 through 13-23; 1977.
Schernus et al; "A New Digital Method . . . "; IEEE Trans. on Instrumentation & Meas.; vol. IM-21; No. 4; Nov. 1972; pp. 346-349.

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