Development of the Highly Precise Magnetic Current Sensor Module of +/−300 A Utilizing AMR Element With Bias-Magnet

Author

Zhang Zhenhong ; Syuji, O. ; Osamu, A. ; Hideto, K.

Author_Institution

Sensor Products Dept. 2, Kanazawa Murata Manuf. Co., Ltd., Otsuki, Japan

Volume

51

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

1

Lastpage

5

Abstract

More and more sensitivity improvement is required for current sensors that are used in new area of applications, such as electric vehicle, smart meter, and electricity usage monitoring system. To correspond with the technical needs, a high precision magnetic current sensor module has been developed. The sensor module features an excellent linearity and a small magnetic hysteresis. In addition, it offers 2.5-4.5 V voltage output for 0-300 A positive input current and 0.5-2.5 V voltage output for 0-300 A negative input current under -40 °C-125 °C, VCC = 5 V condition.

Keywords

electric vehicles; enhanced magnetoresistance; magnetic sensors; permanent magnets; smart meters; AMR element; bias-magnet; current 0 A to 300 A; electric vehicle; electricity usage monitoring system; high precision magnetic current sensor module; magnetic current sensor module; negative input current; positive input current; small magnetic hysteresis; temperature -40 degC to -125 degC; voltage 0.5 V to 4.5 V; voltage 5 V; Magnetic hysteresis; Magnetic resonance imaging; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature; Temperature sensors; Biased anisotropic magneto resistance (AMR) element; OP-AMP; SmCo permanent magnet; Wheatstone bridge; bus-bar; current sensor; permalloy thin film; temperature compensate;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2359209

Filename

7029229