Title :
Development of a Small and Wide-Range Three-Phase Current Sensor Using an MI Element
Author :
Kudo, T. ; Tsuji, N. ; Asada, T. ; Sugiyama, S. ; Wakui, S.
Author_Institution :
Fuji Electr. Adv. Technol. Corp. Ltd, Saitama
Abstract :
This paper describes a compact three-phase electric current sensor using a magneto-impedance (MI) sensor for wide-range current sensing. The MI sensor is composed of a thin-film MI element and a bias coil. Double shields are used for high shielding performance maintaining compact size. Two kinds of alternating bias are used in the system to achieve a wide measurement range of 1:600. Furthermore, using optimized carrier electric current is shown to decrease the temperature dependence of the MI sensor
Keywords :
electric current measurement; magnetic sensors; magnetic shielding; magnetic thin film devices; bias coil; carrier electric current; current measurement; magnetic shielding; magnetic transducers; magnetoimpedance sensor; thin-film devices; three-phase current sensor; Coils; Current measurement; Linearity; Magnetic cores; Magnetic field measurement; Magnetic sensors; Magnetic shielding; Saturation magnetization; Sensor phenomena and characterization; Solids; Circuit; current measurement; magnetic transducers; shielding; thin-film devices;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879641
