基于巨磁阻的直流电流传感器的磁屏蔽研究  

Research of Magnetic Shielding Based on GMR Current Sensor

作　　者：梁逍 辛守乔 LIANG Xiao;XIN Shou-qiao(College of Electrical and Electronic Engineering,Changchun University of Technology,Changchun 130012,China;Three Gorges New Energy Offshore Wind Power Operation and Maintenance Jiangsu Co.,Ltd,Yancheng 224005,China)

机构地区：[1]长春工业大学电气与电子工程学院,吉林长春130012 [2]三峡新能源海上风电运维江苏有限公司,江苏盐城224005

出　　处：《电工电气》2021年第9期14-17,53,共5页Electrotechnics Electric

摘　　要：由于巨磁阻传感器对磁场反应灵敏,因此邻近输电导线的磁场干扰会使巨磁阻传感器产生测量误差。为了降低磁场干扰,从理论和数值计算两方面对巨磁阻传感器的磁屏蔽壳进行优化设计,提出了一种多层屏蔽的设计方案。将屏蔽前的测量误差和屏蔽后的测量误差进行对比发现,采用所提出的屏蔽方案可以较好地降低邻近传输线的磁干扰,提高巨磁阻传感器的测量精度。The giant magnetic resistance(GMR)sensor has a sensitive reaction to the magnetic field.Because of this,the magnetic field interference of adjacent power transmission wires could cause the GMR sensor to produce measurement error.This paper provides a multi-layer plan base on the theory and numerical calculations to reduce the magnetic field interference to solve this problem.The proposed shielding scheme can better reduce the magnetic interference of adjacent transmission lines and improve the measurement accuracy of the GMR sensor after comparing the measurement error before shielding and the measurement error after shielding.

关 键 词：巨磁阻 直流电流 干扰 数值计算 屏蔽 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]