A New Compact Fluxgate Current Sensor for AC and DC Application

Author

Xiaoguang Yang ; Yuanyuan Li ; Wei Guo ; Weidong Zheng ; Cunfu Xie ; Hongli Yu

Author_Institution

Province-Minist. Joint Key Lab. of Electromagn. Field & Electr. Apparatus Reliability, Hebei Univ. of Technol., Tianjin, China

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

This paper presents a compact current sensor for the measurement of ac and dc. The sensor consists of two toroidal magnetic cores. One core works in fluxgate principle to measure dc and low-frequency ac, and the other one is used as a current transformer for higher frequency application. The closed-loop configuration with a magnetic core and feedback winding in the sensor improved the sensitivity of the sensor, eliminated the offset and drift related to temperature, and greatly reduced the error caused by magnetic hysteresis phenomenon. It can measure currents up to 20 A, has an accuracy of 0.7% and ~30-kHz bandwidth.

Keywords

current transformers; electric current measurement; electric sensing devices; frequency measurement; magnetic cores; magnetic hysteresis; magnetic sensors; transformer windings; DC measurement; closed-loop configuration; compact fluxgate current sensor; current transformer; feedback winding; low-frequency AC measurement; magnetic hysteresis phenomenon; toroidal magnetic core; Current measurement; Magnetic cores; Magnetic hysteresis; Resistors; Soft magnetic materials; Toroidal magnetic fields; Windings; Closed-loop; current sensor; fluxgate; toroidal magnetic cores;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2330373

Filename

6971666