文档名：基于等效复数磁导率的利兹线绕组损耗计算模型
摘要：绕组损耗是高频变压器总体损耗的重要组成部分,是影响磁性元件体积、效率和温升的关键性参数.由于利兹线的高频损耗小而广泛应用于高频变压器绕组,但其复杂的三维扭转结构导致准确、快速地计算绕组损耗十分困难.解析方法需要进行简化和近似处理,难以准确地表征绕组的高频涡流特性,有限元数值方法需要对每匝绕组精细化建模,导致计算资源耗费严重.采用具有等效复值材料特性的区域替代绕组区域的均匀化技术,能够实现二维磁场对涡流效应的表征,降低了精细化建模的计算成本.但等效区域的材料特性需要利用数值方法获得,增加了计算的复杂性.因此该文通过分析利兹线损耗机理,考虑利兹线截面形状对等效区域材料特性的影响,实现了圆形利兹线绕组等效复数磁导率的明确解析描述.建立了圆形利兹线绕组损耗计算模型,验证了等效复数磁导率计算邻近效应的准确性,实现了较宽频率范围内绕组损耗的准确预测.
Abstract：Asanimportantcomponentoftheoveralllossofhigh-frequencytransformers,windinglossisakeyparameteraffectingthevolume,efficiency,andtemperatureriseofmagneticcomponents.Litz-wireiswidelyusedinhigh-frequencytransformerwindingbecauseofitsabilitytoachieveconductorin-turntranspositionandreducelossesduetotheskineffectandproximityeffect.Thehomogenizationtechnique,usingaregionwiththeequivalentcomplexmaterialpropertiesinsteadofthewindingregion,canrealizethecharacterizationoftheeddycurrenteffectbythetwo-dimensionalmagneticfieldandreducethecomputationalcostofrefinementmodeling.However,thematerialpropertiesoftheequivalentregionareobtainedusingnumericalmethods,makingthecalculationcomplex.Therefore,thispaperestablishesalosscalculationmodelofLeedswirewindingbasedonequivalentcomplexpermeabilitytocalculatewindinglossesaccuratelyandefficiently.Firstly,thewindinglosscalculationmodelisestablishedbasedontheorthogonalityoftheskinandproximityeffects.TheequivalentcomplexpermeabilityofthewindingiscalculatedusingthefactorydataoftheLitz-wire.Then,theoverallmodelingofLitz-wirewindingiscarriedoutinthesimulationsoftware,andtheexternalmagneticfieldvalueofthewindingisextractedfortheproximityeffectlosscalculation.Finally,theskineffectlossiscalculatedusingtheanalyticalformula.TheactualwindingmodelofACresistanceinthewidefrequency(20Hz～1MHz)rangeshowsthatACresistanceinthelow-frequencyband(20Hz～100kHz)isapproximatelyequaltoDCresistance.Atthistime,thecalculationerrorcanbealmostneglected,andthecalculationaccuracymainlydependsonthecalculatedvalueoftheDCresistance.Theskineffectinthemedium-frequencyband(100kHz～500kHz)becomesgraduallyobvious,andACresistancerisesrapidly.Thehighesterrorisaround300kHz,andthemaximumis10.07%.Inthehigh-frequencyband(500kHz～1MHz),theproximityeffectbetweenthewindingmakestheACresistanceriserapidly.Themaximumerrorinthehigh-frequencybandis15.22%,andtheerrorintherestofthefrequencyisabout10%.Thefollowingconclusionscanbeobtained:(1)BydescribingtheequivalentcomplexpermeabilityofthecircularLitz-wirewindinganalytically,thepreprocessingofthebasicunitisavoided,andthecalculationprocessissimplified.(2)Thehomogenizedfiniteelementmethodisusedforoverallmodeling.Theeddycurrentisanalyzedinthethree-dimensionalstructureoftheLitz-wirewindingbasedonthetwo-dimensionalstaticmagneticfielddistributionandcombinedwiththecomplexpermeabilitymodel.Thecalculationaccuracyandspeedareimproved.(3)Consideringtheinfluenceofthewindingsectionshapeontheloss,theskineffectandproximityeffectarecharacterized,increasingtheapplicabilityofthemodelathighfrequencyandrealizingtheaccuratelosspredictionatwidefrequency.
作者：赵志刚 王丽美 陈天缘 赵安琪 卢子奇Author：ZhaoZhigang WangLimei ChenTianyuan ZhaoAnqi LuZiqi
作者单位：省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学)天津300401;河北省电磁场与电器可靠性重点实验室(河北工业大学)天津300401
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(4)
分类号：TM433
关键词：利兹线 绕组损耗 等效复数磁导率 趋肤效应 邻近效应
Keywords：Litz-wire windingloss equivalentcomplexpermeability skineffect proximityeffect
机标分类号：TM433U452TQ127.11
在线出版日期：2024年3月5日
基金项目：国家自然科学基金，国家自然科学基金，河北省人才工程培养项目基于等效复数磁导率的利兹线绕组损耗计算模型[
期刊论文] 电工技术学报--2024, 39(4)赵志刚 王丽美 陈天缘 赵安琪 卢子奇绕组损耗是高频变压器总体损耗的重要组成部分,是影响磁性元件体积、效率和温升的关键性参数.由于利兹线的高频损耗小而广泛应用于高频变压器绕组,但其复杂的三维扭转结构导致准确、快速地计算绕组损耗十分困难.解析方法需...参考文献和引证文献
参考文献
引证文献
本文读者也读过
相似文献
相关博文
基于等效复数磁导率的利兹线绕组损耗计算模型 Calculation Model of Winding Loss of Litz-Wire Based on Equivalent Complex Permeability
基于等效复数磁导率的利兹线绕组损耗计算模型.pdf
- 文件大小:
- 1.01 MB
- 下载次数:
- 60
-
高速下载
|
|
