Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Magnetic saturation
Patent
1988-12-07
1990-10-02
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Magnetic saturation
324127, G01R 1900
Patent
active
049610490
ABSTRACT:
The present invention provides current measuring apparatus of the type using magnetic coupling, the apparatus comprising a transformer (Tr) having a gap (E) in which a device (G) is disposed suitable for providing a signal which is a function of the magnetic flux existing in the gap with the primary winding (P) of the transformer conveying the current (I) to be measured. The apparatus includes the improvement of employing a device for separating the high frequency A.C. components from the low frequency A.C. components and the D.C. component of the current to be measured. In addition, a device for providing a second signal proportional to the high frequency A.C. component is used, along with a summing device (.epsilon.) for summing a first signal and the second signal as provided by the device located in the gap.
The invention is applicable in the electrical industry to measure current.
REFERENCES:
patent: 3482163 (1967-12-01), Peek et al.
patent: 3916310 (1975-10-01), Stark et al.
patent: 4255705 (1981-03-01), Milkovic
patent: 4682101 (1987-07-01), Cattaneo
Agence Spatiale Europeenne
Eisenzopf Reinhard J.
Urban Edward
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