基于隧道磁阻效应的电流传感器设计  

Design of Electronic Current Sensor Based on Tunneling Magnetoresistance Effect

作　　者：陈玲君[1] 徐少华[1] CHEN Lingjun;XU Shaohua(Shaoxing Vocational&Technical College,Shaoxing 312000,China)

机构地区：[1]绍兴职业技术学院,浙江绍兴312000

出　　处：《电视技术》2022年第12期8-13,共6页Video Engineering

基　　金：校级科研项目(SZK202055);中国民办教育协会规划课题(学校发展类)(CANFZG22186)。

摘　　要：针对复杂电流环境下高精度电流采样的需求,设计基于隧道磁阻效应的电流传感器,它能有效实现在直流和偶次谐波影响下的高精度电流采样,直接替换微型电磁式电流互感器。研制了基于隧道磁阻效应的电子式电流传感器样机并进行实验,在直流(半波)条件下测试,电子式电流传感器采样的电表用电量与锰铜采样的电表用电量基本接近,误差基本为零,而电磁式电流互感器采样的电表在不同功率因数下计量都不准确。该传感器能够广泛应用于智能电网、新能源和广播电视领域设备的电流测量,如新能源汽车、直流充电桩等应用。In this paper, aiming at the demand of high-precision current sampling in complex current environment, a current sensor based on tunnel magnetoresistance effect is designed, which can effectively realize high-precision current sampling under the influence of DC and even harmonics and directly replace the miniature electromagnetic current transformer. A prototype of tunnel magnetoresistance effect current sensor was developed and tested under the condition of direct current(half wave). The electricity consumption of the electric meter sampled by the electronic current sensor is basically close to that of the manganese copper meter,and the error is basically zero. However, the electricity meters sampled by the electromagnetic current transformer are inaccurate under different power factors. Therefore, the sensor can be widely used for current measurement in smart grid, new energy charging and radio and television equipment fields, such as new energy vehicles, DC charging piles and other applications.

关 键 词：隧道磁阻效应 电流传感器 偶次谐波 

分 类 号：TM74[电气工程—电力系统及自动化]