Title :
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
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;
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
DOI :
10.1109/ICEMS.2009.5382643
