文档名：基于SiC MOSFET同步Buck DCDC变换器的宽频混合EMI滤波器设计
摘要：由于SiCMOSFET在高速开关电源中的广泛应用,导致严重的电磁干扰(EMI)问题,因此EMI滤波器的设计成为研究热点.为了满足电磁兼容(EMC)标准,无源EMI滤波器可以有效地降低DC-DC变换器产生的电磁干扰,但是无源磁性器件的体积较大,不利于提高DC-DC变换器的功率密度.该文分析DC-DC变换器的电磁干扰源和噪声源阻抗特性,建立无源和有源EMI滤波器的理论模型,提出宽频混合EMI滤波器的设计方法.最后,通过实验验证宽频混合EMI滤波器对DC-DC变换器EMI的抑制效果.
Abstract：Thehighdv/dtanddi/dtaregeneratedbypowerelectronicdevices,suchasSiCMOSFETsandGaNMOSFETs,duringpowerconverterswitching,causingseriouselectromagneticinterference(EMI)problems.Therefore,EMIfilterdesignhasbecomeahotspotinEMIresearch.ThetraditionalpassiveEMIfilter(PEF)caneffectivelyreduceEMIgeneratedbyDC-DCconverters.BecauseofsafetyrestrictionsontheYcapacitor,alarge-volumecommon-mode(CM)chokeisusuallyusedtosuppresslow-frequencyEMI.Then,activeEMIfilters(AEF)areefficaciousinimprovingthepowerdensityofpowerconvertersduetotheirexcellentlow-frequencyEMIattenuationcharacteristics.Accordingtothehigh-frequencyEMIattenuationcharacteristicsofPEFandlow-frequencyEMIattenuationcharacteristicsofAEF,hybridEMIfilters(HEF)havebecomethemainstreamforEMIsuppression.Becauseofthedemandforhighpowerdensity,thesizeandweightoftheelectroniccomponentsofHEFmustbeconsideredbystandardizingHEFdesign.Firstly,anEMImodelofthesynchronousBuckDC-DCconverterisproposed.Common-mode(CM)anddifferential-mode(DM)noisesourceimpedancemodelsareanalyzed,andCMandDMimpedancesaredetermined.Then,theCM/DMnoisesourceofthesynchronousBuckDC-DCconverterismeasuredusingalineimpedancestabilizationnetwork(LISN).Secondly,accordingtotheinsertionloss(IL)requirements,ahybridEMIfilterdesignmethodisproposed.BasedontheEMImodelofthesynchronousBuckDC-DCconverter,anHEFtopologyisselected,andtheparametersofHEFcomponentsarequantitativelydesignedtoachievetherequiredIL.Finally,thetopologiesofPEFandAEFareanalyzed,andtheirILisobtainedtheoretically.ThetopologyandILofHEFarestudiedforthefilterdesign.TheresultsshowthatCMnoisedominatesinthesynchronousBuckDC-DCconverter,andCLstructureandπ-typePEFstructureeffectivelysuppressCMandDMnoises,respectively.Thecurrent-sensingcurrent-compensating(CSCC)AEFisselectedtofurthersuppressCMnoisebasedonnoisesourceimpedanceandloadimpedancecharacteristics.UnderselectedparametervaluesofHEFcomponents,thecalculatedpassiveDMILandhybridCMILmeetHEFdesignrequirements.TheexperimentalresultsshowthattheEMInoisesuppressioneffectisbetterwiththeadditionofthehybridEMIfilter,achievinganaveragesuppressionofnearly35dBacrossthefrequencyband(150kHz～30MHz).AddinganHEFintoapowerconverterdecreasessystemefficiencybyanaverageof1.24%.Thefollowingconclusionscanbedrawn:combinedwithCMandDMnoisesourcecircuitmodelsofthesynchronousBuckDC-DCconverter,CMandDMimpedancecharacteristicscanbeobtained.ThroughthetheoreticalanalysisofILoftheHEFcircuittopology,thedesignprocessofthehybridEMIfilterispresented,andtheparametersofEMIfiltercomponentscanbequantitativelydesigned.TheproposedbroadbanddesignmethodofHEFcanmeettheEMCstandardandimprovethepowerdensityofthesystem,whichhashighengineeringapplicationvalue.
作者：徐浩东 罗嗣勇 毕闯 孙渭薇 赵海英 刘娇健 Author：XuHaodong LuoSiyong BiChuang SunWeiwei ZhaoHaiying LiuJiaojian
作者单位：国网陕西省电力有限公司电力科学研究院西安710100电子科技大学航空航天学院/飞行器集群智能感知与协同控制四川省重点实验室成都611731国网陕西省电力有限公司营销服务中心西安710100国网西安市南供电公司西安710061
刊名：电工技术学报 ISTICEIPKU
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(10)
分类号：TM133
关键词：SiCMOSFET 电磁干扰(EMI)噪声源阻抗 混合EMI滤波器
Keywords：SiCMOSFET electromagneticinterference(EMI) noisesourceimpedance hybridEMIfilter
机标分类号：TM46TN713TM571
在线出版日期：2024年5月31日
基金项目：国网陕西省电力有限公司科技资助项目基于SiCMOSFET同步BuckDC-DC变换器的宽频混合EMI滤波器设计[
期刊论文] 电工技术学报--2024, 39(10)徐浩东 罗嗣勇 毕闯 孙渭薇 赵海英 刘娇健由于SiCMOSFET在高速开关电源中的广泛应用,导致严重的电磁干扰(EMI)问题,因此EMI滤波器的设计成为研究热点.为了满足电磁兼容(EMC)标准,无源EMI滤波器可以有效地降低DC-DC变换器产生的电磁干扰,但是无源磁性器件...参考文献和引证文献
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基于SiC MOSFET同步Buck DC-DC变换器的宽频混合EMI滤波器设计.pdf
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