文档名：基于不同绕组形式双定子低速大转矩永磁直驱电机转矩脉动的分析与抑制
摘要：双定子低速大转矩永磁直驱电机(DLHPMDM)具有高转矩密度和高效率等优点,是传统低速大转矩传动系统的良好替代方案.DLHPMDM可以看作由内、外两台电机构成的整体.绕组形式选择不仅直接影响内、外电机的转矩性能,内、外电机不同绕组形式的组合还会改变内、外电机输出转矩的叠加效果,最终影响DLHPMDM的转矩脉动水平.首先,基于双定子电机的转矩叠加原理,提出一种抑制DLHPMDM转矩脉动的设计方法,采用解析法分析内、外电机反电动势谐波相位差如何影响纹波转矩的叠加效果,并对内定子采用不同绕组形式时DLHPMDM的转矩性能进行仿真分析和初步验证.其次,考虑到绕组谐波引起的谐波电流对转矩脉动的影响,采用以电压源为激励的有限元分析进一步验证了内、外电机选用合理的绕组形式组合时,内、外电机纹波转矩的叠加削减作用能够有效降低DLHPMDM的转矩脉动.最后,采用转矩脉动最低的设计方案试制了一台DLHPMDM样机并完成相关实验,实验结果验证了分析的准确性.
Abstract：Byincorporatingthemeritsofthehightorquedensity,highefficiency,andcompactsize,thedual-statorlow-speedhigh-torquepermanentmagnetdrivemachine(DLHPMDM)isanexcellentalternativetothetraditionalmachineinlow-speedhigh-torqueapplications.Fordual-statormachines,thetotaloutputtorqueequalstheoutputtorquesuperpositionofinnerandoutermachines,namelythetorquesuperpositionprincipleofdual-statormachines.Thisprinciplecanexplainthemechanismofreducingthetorquerippleofthedual-statorpermanentmagnetmachines.Changingthepole-slotnumbercombinationisacrucialmethodtoreducethetorquerippleofmachines.However,inanalyzingandmitigatingtorqueripplefortheDLHPMDM,consideringtheinnerandoutermachinesaloneneedstoberevisedandmoreaccurate.Moreattentionshouldbepaidtothesuperpositionreductioneffectofinnerandoutertorquerippleresultingfromdifferentphases.ThecombinationnumberofinnerandouterstatorslotscanaffectthetorquerippleoftheDLHPMDM.Basedonthetorquesuperpositionprincipleofdual-statormachines,adesignmethodisproposedtoreducethetorquerippleoftheDLHPMDMwiththeinnerandouterwindingsconnectedinparallel.Generally,the6thrippletorqueaccountsforthelargestproportionofthetorquerippleofpermanentmagnetmachines.Supposethephasedifferencebetweenthe6thrippletorqueoftheinnerandoutermachinesisclosetoπ.Inthatcase,thesuperpositionreductioneffectcanbeachieved,therebyreducingthetotaltorquerippleoftheDLHPMDM.Whenonlyconsideringthesituationwherethefundamentalsinusoidalcurrentispassedthroughthestatorwindings,the6thrippletorqueiscausedbythefollowingtwocases.Oneistheinteractionofthefundamentalcurrentandthe5thharmonicofthebackEMF.Theotheristheinteractionofthefundamentalcurrentandthe7thharmonicofthebackEMF.Thefundamentalphasesoftheinnerandouterstatorcurrentsareapproximatelythesame.Therefore,whentheDLHPMDMisdividedintotwoindependentmachinesfordesign,thesuperpositioneffectof6thrippletorqueoftheinnerandoutermachinescanbepredictedbythephaserelationshipoftheback-EMFsharmonics.Then,theappropriatewindingformcombinationisdeterminedtoreducethetotaltorquerippleoftheDLHPMDMbyutilizingthesuperpositionreductioneffect.BasedonthreeprojectsofDLHPMDMwithdifferentwindingformsinstalledontheinnerstator,theinfluenceoftheharmonicphasedifferenceofbackEMFsofinnerandoutermachinesonthesuperpositionoftherippletorqueisanalyzed.Bycomparingtorqueperformance,thewindingformcombinationoftheinnerandouterstatorsisinitiallyselected.Then,consideringtheinfluenceofharmoniccurrentsfromwindingharmonics,thetorquerippleofDLHPMDMcanbeeffectivelyreduced(from8.84％to5.21％)withareasonablewindingformcombination.Finally,aprototypeoftheDLHPMDMismanufacturedandtested.Theresultsarewellconsistentwiththesimulatedresults,whichverifiesthefeasibilityofthelowtorquerippledesignmethod.
作者：刘佶炜 狄冲 李仕豪 鲍晓华Author：LiuJiwei DiChong LiShihao BaoXiaohua
作者单位：合肥工业大学电气与自动化工程学院合肥230009
刊名：电工技术学报 ISTICEIPKU
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(12)
分类号：TM351
关键词：双定子永磁直驱电机 绕组形式 转矩叠加原理 纹波转矩 转矩脉动
Keywords：Dual-statorpermanentmagnetdrivemachine windingforms torquesuperpositionprinciple rippletorque torqueripple
机标分类号：TM351U469.72TP273
在线出版日期：2024年7月19日
基金项目：国家自然科学基金基于不同绕组形式双定子低速大转矩永磁直驱电机转矩脉动的分析与抑制[
期刊论文] 电工技术学报--2024, 39(12)刘佶炜 狄冲 李仕豪 鲍晓华双定子低速大转矩永磁直驱电机(DLHPMDM)具有高转矩密度和高效率等优点,是传统低速大转矩传动系统的良好替代方案.DLHPMDM可以看作由内、外两台电机构成的整体.绕组形式选择不仅直接影响内、外电机的转矩性能,内、外电机不...参考文献和引证文献
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