Sensing and measurement of DC current using a transformer and RL-multivibrator

Author

Filanovsky, I.M. ; Piskarev, V.A.

Author_Institution

Alberta Univ., Edmonton, Alta., Canada

Volume

38

Issue

11

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

1366

Lastpage

1370

Abstract

A circuit for sensing and measurement of DC current using a transformer and RL-multivibrator is proposed. The bridge multivibrator circuit is obtained, connecting the primary coil of a nonlinear transformer to an operational amplifier. The DC current that has to be measured is applied to the secondary of the transformer. It is shown that the DC voltage measured at the inverting node of the operational amplifier gives the information on polarity and value of DC current in the secondary. The transfer characteristic of such a DC current sensor is linear for small values of the measured DC current

Keywords

bridge circuits; electric current measurement; electric sensing devices; multivibrators; transformers; DC current; RL-multivibrator; bridge multivibrator circuit; current sensor; nonlinear transformer; operational amplifier; primary coil; Bridge circuits; Circuit faults; Coils; Current measurement; Magnetization; Operational amplifiers; Pulse transformers; Sensor phenomena and characterization; Tensile stress; Voltage measurement;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.99166

Filename

99166