文档名：三相CLLC谐振变换器磁集成平面变压器设计与优化
摘要：三相CLLC谐振变换器凭借其高效率、大容量、低器件应力等优势而受到广泛关注.然而,多相结构的磁性元件数量多、体积大,是制约功率变换器尺寸的主要因素.随着宽禁带(WBG)半导体器件的出现,功率变换器的开关频率显著提高,这也为印制电路板(PCB)绕组的使用提供了有利条件.与传统绕线式绕组相比,PCB绕组的扁平特性更适用于平面磁性元件.此外,由于高频带来的低电感需求也使得基于PCB绕组的平面磁性元件更有利于实现集成.该文提出一种新型的基于PCB绕组的电感和变压器的集成结构,详细分析磁心结构的磁路模型,并给出集成磁件的优化设计方法,最后通过搭建一台基于SiC器件的800V/10kW的实验样机进行验证.实验结果表明,该集成方案可有效减小变换器的体积和损耗,具有高功率密度和高效率.
Abstract：Thethree-phaseCLLCresonantconverterhasattractedwidespreadattentionduetoitshighefficiency,highcapacity,andlowdevicestress.However,thelargenumberandvolumeofmagneticcomponentsinmulti-phasestructuresarethemainfactorslimitingthesizeofpowerconverters.Withthedevelopmentofwidebandgapdevices,theswitchingfrequencyofpowerconvertershassignificantlyincreased,providingfavorableconditionsfortheutilizationofPCBwindings.TheflatcharacteristicsofPCBwindingsaremoresuitableforplanarmagneticcomponents.Additionally,thelowinductancedemandbroughtaboutbyhighfrequenciesalsomakesPCB-basedplanarmagneticcomponentsmoreadvantageousforintegration.Someintegratedschemeshaveachievedtheintegrationofallmagneticelementsandthecontrollabilityofleakageinductance,buttheirstructureresultedintheasymmetryofmagneticresistance.Someotherstudieshaveproposedasymmetricalintegratedschemethatachievedthecompletesymmetryofmagneticresistance,buttheleakageinductanceobtainedbytheintegrationmethodwasrestricted.Inthispaper,a"cylindrical"planarmagneticcorestructurebasedonathree-phaseCLLCresonantconverterisproposedtorealizetheintegrationofmagneticelementsandimprovethepowerdensityofthesystem.Themagneticcorestructureisentirelysymmetricalinspace,achievingthesymmetryofmagneticresistanceandenhancingthestabilityofthesystem.Fig.A1showsourtopologystructureandintegratedmagneticcorestructure(includingtheplanarstructurediagram).Theproposedintegratedmagneticsconsistsofthemagneticlid,magneticplate,PCBwinding,andmagneticbase.Firstly,accordingtotheequivalentcircuitofthethree-phaseCLLCresonantconverter,itsgaincharacteristicsarederived,andtheprototypeparametersarereasonablydesignedaccordingtotherelationshipbetweenthegaincurveandK,Qvalues.Then,basedontheproposedintegratedmagneticcorestructure,amagneticcircuitmodelisestablished.TherelationshipbetweentheresonantinductanceLr,theexcitationinductanceLm,theinductancecoefficientK,thewindingturnsN1andN2,andthemagneticresistanceRgisanalyzed.Next,alossmodelandanoptimizationprocedureofthetransformerisbuilttoachievethelowestlossofthetransformer.Finally,an800V/10kWprototypeplatformwasbuilt.Comparativeexperimentswereconductedwiththe"square"integratedmagneticsandtheproposed"cylindrical"magnetics,asshowninFig.A2.Thefollowingconclusionscanbedrawnfromtheexperiments.(1)Comparedtothe"square"integratedmagnetics,theproposedintegratedmagneticsshowssmallerimbalancesamongthethree-phaseresonantcurrents,achievingbettersystemstability.(2)Theproposedintegratedmagneticsmaintainshigherefficiencythanthe"square"integratedmagnetics,evenwithasmallervolumeandfootprint.Itdemonstratesthattheproposedstructurepossesseshighpowerdensityandefficiency.(3)Theproposedintegratedmagneticsachievesanefficiencyof97.5％atfullload,validatingtherationalityandfeasibilityoftheproposedmagneticcorestructure.
作者：程鹤 徐恺 李朋圣 齐乃菊 于东升Author：ChengHe XuKai LiPengsheng QiNaiju YuDongsheng
作者单位：中国矿业大学电气工程学院徐州221116
刊名：电工技术学报 ISTICEIPKU
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(12)
分类号：TM46
关键词：三相CLLC谐振变换器 PCB绕组 磁集成 优化设计
Keywords：Three-phaseCLLCresonantconverter PCBwinding integratedmagnetics optimaldesign
机标分类号：TM402TN624TM352
在线出版日期：2024年7月19日
基金项目：江苏省自然科学基金，徐州市基础研究计划资助项目三相CLLC谐振变换器磁集成平面变压器设计与优化[
期刊论文] 电工技术学报--2024, 39(12)程鹤 徐恺 李朋圣 齐乃菊 于东升三相CLLC谐振变换器凭借其高效率、大容量、低器件应力等优势而受到广泛关注.然而,多相结构的磁性元件数量多、体积大,是制约功率变换器尺寸的主要因素.随着宽禁带(WBG)半导体器件的出现,功率变换器的开关频率显著提高,这也...参考文献和引证文献
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三相CLLC谐振变换器磁集成平面变压器设计与优化 Design and Optimization of Three-Phase CLLC Resonant Converter with Magnetic Integrated Planar Transformer
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