Direct current detecting device using saturable reactors

Details Direct current detecting device using saturable reactors Direct current detecting device using saturable reactors

1979-10-30

1981-08-25

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324127, 330 8, G01R 3300, G01R 122

Patent

active

042862116

ABSTRACT:
A direct current detecting device is disclosed in which two pairs of saturable cores are provided so as to enclose a conductor carrying a direct current to be measured. On each of the saturable cores, a bias winding, a feedback winding and an output winding are wound. First and second output circuits are provided, each connected with a pair of output windings and each including two closed current paths consisting of the output winding, a common load, a common A.C. supply source and a diode. The diodes function to allow the greater one of current flows of the two closed paths to be passed through the common load. An amplifier is connected to receive the difference between output signals of the two output circuits. The output of the amplifier is supplied to the feedback winding whereby the magnitude of the feedback current becomes a function of the magnitude of the current flowing through the conductor.

REFERENCES:
patent: 2164383 (1939-07-01), Burton
patent: 3015073 (1961-12-01), Mamon
patent: 3801907 (1974-04-01), Lilienstein
Fry, M. G. J.; "An Inexpensive . . ."; IEEE Trans. on Nuc. Sci.; vol. NS-18; No. 3; Jun. 1971; pp. 865-868.
"No-Contact DC-Transformer . . ."; Electronic Design; Jun. 7, 1973.
Fuja et al.; "Performance of . . ."; IEEE Trans. on Nuc. Sci.; Jun. 1973; pp. 411-413.

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