Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2359209
