Design and Realization of a Novel Compact Fluxgate Current Sensor

Author

Xiaoguang Yang ; Yuanyuan Li ; Weidong Zheng ; Wei Guo ; Youhua Wang ; Rongge Yan

Author_Institution

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

Volume

51

Issue

3

fYear

2015

fDate

Mar-15

Firstpage

1

Lastpage

4

Abstract

A new closed-loop magnetic current sensor is presented in this paper. The sensor consists of two toroidal magnetic cores. One core works in fluxgate principle for the measurement of dc and low-frequency ac, and the other one is used as a current transformer for higher frequency application. Based on the simulation results, a prototype was designed, and the test results have a good agreement with the simulation results. The closed-loop configuration with a magnetic core and a 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, with an accuracy of 0.5%, and a 50 kHz small signal bandwidth.

Keywords

current transformers; electric current measurement; electric sensing devices; fluxgate magnetometers; magnetic cores; magnetic hysteresis; magnetic sensors; transformer windings; bandwidth 50 kHz; closed loop magnetic current sensor; compact fluxgate current sensor; current measurement; current transformer; feedback winding; fluxgate principle; magnetic hysteresis phenomenon; toroidal magnetic core; Current measurement; Magnetic cores; Magnetic hysteresis; Resistors; Soft magnetic materials; Toroidal magnetic fields; Windings; Closed loop; fluxgate principle; magnetic hysteresis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2358671

Filename

7093606