8《电视技术》第46卷第12期(总第565期)PARTS&DESIGN器件与设计文献引用格式：陈玲君，徐少华.基于隧道磁阻效应的电流传感器设计[J].电视技术，2022，46（12）：8-13.CHENLJ，XUSH.Designofelectroniccurrentsensorbasedontunnelingmagnetoresistanceeffect[J].VideoEngineering，2022，46（12）：8-13.中图分类号：TM74文献标识码：ADOI：10.16280/j.videoe.2022.12.003基于隧道磁阻效应的电流传感器设计陈玲君，徐少华（绍兴职业技术学院，浙江绍兴312000）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。关键词：隧道磁阻效应；电流传感器；偶次谐波DesignofElectronicCurrentSensorBasedonTunnelingMagnetoresistanceEffectCHENLingjun,XUShaohua(ShaoxingVocational&TechnicalCollege,Shaoxing312000,China)Abstract:Inthispaper,aimingatthedemandofhigh-precisioncurrentsamplingincomplexcurrentenvironment,acurrentsensorbasedontunnelmagnetoresistanceeffectisdesigned,whichcaneffectivelyrealizehigh-precisioncurrentsamplingundertheinfluenceofDCandevenharmonicsanddirectlyreplacetheminiatureelectromagneticcurrenttransformer.Aprototypeoftunnelmagnetoresistanceeffectcurrentsensorwasdevelopedandtestedundertheconditionofdirectcurrent(halfwave).Theelectricityconsumptionoftheelectricmetersampledbytheelectroniccurrentsensorisbasicallyclosetothatofthemanganesecoppermeter,andtheerrorisbasicallyzero.However,theelectricitymeterssampledbytheelectromagneticcurrenttransformerareinaccurateunderdifferentpowerfactors.Therefore,thesensorcanbewidelyusedforcurrentmeasurementinsmartgrid,newenergychargingandradioandtelevisionequipmentfields,suchasnewenergyvehicles,DCchargingpilesandotherapplications.Keywords:tunnelmagneto...
