Measurement and modeling of nonlinear magnetic core characteristics of a fluxgate direct current sensor for wide-range current monitoring

Author

Koseki, Takafumi ; Takada, Yasuhiro ; Obata, Hiroshi ; Hayakeyama, Yori ; Teppan, Wolfram ; Favre, Eric

Author_Institution

Dept. of Electr. Eng., Univ. of Tokyo, Tokyo, Japan

fYear

2009

fDate

15-18 Nov. 2009

Firstpage

1

Lastpage

6

Abstract

Fluxgate sensors are the most sensitive and reliable ones among different kinds of current sensors used in normal temperature. The sensor can measure a few milliamperes direct current. It is, therefore, applied in various small current measurements, especially for battery monitors. This paper proposes the way for extending current measurement range to a hundred amperes by using the information of secondary excitation frequency. The authors derive the dynamic circuit equations for analysing the frequency characteristics and a method for identify the nonlinear magnetic characteristics of the ferromagnetic core to the primary current.

Keywords

electric current measurement; fluxgate magnetometers; magnetic cores; secondary cells; battery monitors; current measurement; ferromagnetic core; fluxgate direct current sensor; fluxgate sensors; nonlinear magnetic core characteristics; normal temperature; wide-range current monitoring; Battery charge measurement; Current measurement; Frequency; Magnetic circuits; Magnetic cores; Magnetic sensors; Monitoring; Nonlinear magnetics; Sensor phenomena and characterization; Temperature sensors; battery monitoring; current sensor; fluxgate sensor; nonlinear magnetic core;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on

Conference_Location

Tokyo

Print_ISBN

978-1-4244-5177-7

Electronic_ISBN

978-4-88686-067-5

Type

conf

DOI

10.1109/ICEMS.2009.5382643

Filename

5382643