01、磁元件类资料汇编-30页(双面)

1、术语及定义Hc0HcBrBsBH߱ྟ⺕࣪᳆㒓Initialmagnetizationcurve1.߱ྟ⺕ᇐ⥛­i߱ྟ⺕ᇐ⥛ᰃ⺕ᗻᴤ᭭ⱘ⺕ᇐ⥛(B/H)೼⺕࣪᳆㒓ྟッⱘᵕ䰤ؐˈेHBlim10Hi0oPPᓣЁ­0Ўⳳぎ⺕ᇐ⥛(4±h10-7H/m)HЎ⺕എᔎᑺ(A/m)BЎ⺕䗮ᆚᑺ(T)1.Initialpermeability,­iTheinitialpermeability­iisthelimitvalueattheinitialmagnetizationcurve’soriginpointandisgivenbythefollowingformula:HBlim10Hi0oPPWhere­0:Permeabilityofvacuum(4±×10-7H/m)H:Magneticfieldstrength(A/m)B:Magneticfluxdensity(T)2.᳝ᬜ⺕ᇐ⥛­e೼䯁ড়⺕䏃Ёˈབᵰⓣ⺕ৃᗑ⬹,ৃҹ⫼᳝ᬜ⺕ᇐ⥛ᴹ㸼ᕕ⺕㢃ⱘᗻ㛑DŽAeleNLe20µµxᓣЁLЎ㺙᳝⺕㢃ⱘ㒓೜ⱘ⬉ᛳ䞣(H)NЎ㒓೜᭄ࣱLeЎ᳝ᬜ⺕䏃䭓ᑺ(m)AeЎ᳝ᬜ៾䴶⿃(m2)2.Effectivepermeability,­eThisisusuallydefinedasthepermeabilityofacoreformingaclosedcircuitwhereleakagefluxisnegligiblysmall.AeleNLe20µµxWhereL:self-inductanceofcorewithcoil(H)N:numberofturnsLe:effectivemagneticpathlength(m)Ae:effectivecross-sectionalarea(m2)3.佅੠⺕䗮ᆚᑺBs(T)⺕࣪ࠄ佅੠⢊ᗕⱘ⺕䗮ᆚᑺDŽ㾕೒1DŽ೒1˄Fig1˅3.Saturationmagneticfluxdensity,Bs(T)ThemagneticfluxdensityatamagneticfieldwhereHisuptoanapproximatesaturationmagneticfieldvalue.(Fig.1)4.࠽ԭ⺕䗮ᆚᑺBr(T)Ң佅੠⢊ᗕএ䰸⺕എৢˈ࠽ԭⱘ⺕䗮ᆚᑺDŽ㾕೒lDŽ4.Residualmagneticfluxdensity,Br(T)Thevalueoffluxdensityretainedbythecorewhenthemagneticfieldisreducedfromthestateoftheeffectivesaturationmagneticfluxdensitytozero.(Fig.1)1、术语及定义5.⶿乑࡯Hc(A/m)Ң佅੠⢊ᗕএ䰸⺕എৢˈ⺕㢃㒻㓁㹿ড৥⺕എ⺕࣪ˈⳈ㟇⺕䗮ᆚᑺޣЎ䳊ˈℸᯊⱘ⺕എᔎ⿄Ў⶿乑࡯DŽ㾕೒1DŽ5.Coercivity,Hc(A/m)Thevalueofmagneticfieldstrengthwherebythefluxdensitybecomeszeroundertheintensification,intheoppositedirection,ofthemagneticfield.(Fig.1)6.ᤳ㗫಴᭄tan¥ᤳ㗫಴᭄ᰃ⺕⒲ᤳ㗫ǃ⍵⌕ᤳ㗫੠࠽ԭᤳ㗫ϝ㗙П੠tan¥=tan¥h+tan¥e+tan¥rᓣЁtan¥hЎ⺕⒲ᤳ㗫಴᭄tan¥eЎ⍵⌕ᤳ㗫಴᭄tan¥rЎ࠽ԭᤳ㗫಴᭄6.Lossfactor,tan¥Thisisthesumofthehysteresislossfactor,eddycurrentlossfactorandresiduallossfactor.tan¥=tan¥h+tan¥e+tan¥rWheretan¥histhehysteresislossfactortan¥eistheeddycurrentlossfactortan¥ristheresiduallossfactor7.Ⳍᇍᤳ㗫಴᭄tan¥/­Ⳍᇍᤳ㗫಴᭄ᰃᤳ㗫಴᭄Ϣ⺕ᇐ⥛П↨:tan¥/­i(䗖⫼Ѣᴤ᭭)tan¥/­e(䗖⫼Ѣ⺕䏃Ё৿᳝⇨䱭ⱘ⺕㢃)7.Relativelossfactor,tan¥/­Thisistheratiooflossfactortopermeability.tan¥/­i(formaterials)tan¥/­e(forcoreswithgapsinthemagneticcircuit)8.ક䋼಴᭄Qક䋼಴᭄Ўᤳ㗫಴᭄ⱘצ᭄:Q=1/tan¥8.Qualityfactor,QThisisthereciprocalofthelossfactorandisgivenbyQ=1/tan¥.9.⏽ᑺ㋏᭄Įµ(1/K)⏽ᑺ㋏᭄Ў⏽ᑺ೼T1੠T2㣗ೈݙব࣪ᯊˈ↣ব࣪1KⳌᑨⱘ⺕ᇐ⥛ⱘⳌᇍব࣪䞣˖)T(TT-T1µµ-µµ1212112!xDᓣЁµ1Ў⏽ᑺЎT1ᯊⱘ⺕ᇐ⥛µ2Ў⏽ᑺЎT2ᯊⱘ⺕ᇐ⥛9.Temperaturecoefficient,Įµ(1/K)Thisisthefractionaldifferenceofpermeabilityper1KinatemperaturerangeoffromT1toT2.)T(TT-T1µµ-µµ1212112!xDWhereµ1:permeabilityattemperatureT1µ2:permeabilityattemperatureT210.Ⳍᇍ⏽ᑺ㋏᭄Įµr(1/K)⏽ᑺ㋏᭄੠⺕ᇐ⥛П↨ˈे)T(TT-T1µµ-µµ12122212!xD10.Relativetemperaturecoefficient,Įµr(1/K)Thisisthetemperaturecoefficientperunitpermeabilityandisgivenbythefollowingequation:)T(TT-T1µµ-µµ12122212!xD11.ሙ䞠⏽ᑺTc(ć)೼䆹⏽ᑺϟᴤ᭭⬅䪕⺕ᗻ(៪Ѯ䪕⺕ᗻ)䕀ব៤乎⺕ᗻDŽ㾕೒2DŽ11.Curietemperature,TcItisthecriticaltemperaturelevelatwhichtheferromagneticstateofthematerialchangestoparamagneticstate.(Fig.2)1、术语及定义߱ྟ⺕ᇐ⥛,QLWLDOPermeability­i⺕ᇐ⥛᳔໻ؐⱘ20%20%ofmaximumvalueof­i⏽ᑺTemperature˄ć˅ሙ䞠⏽ᑺ˄Tc˅Curietemperature⺕ᇐ⥛᳔໻ؐmaximumvalueof­i⺕ᇐ⥛᳔໻ؐⱘ80%80%ofmaximumvalueof­i೒2˄Fig2˅12.ޣ㨑಴᭄DF೼ᘦ⏽ᴵӊϟˈᅠܼ䗔⺕ⱘ⺕㢃ⱘ⺕ᇐ⥛䱣ᯊ䯈ⱘ㹄ޣব࣪ˈे12211221FTTµ1TTlogµ-µD!xᓣЁµ1Ў䗔⺕ৢt1ߚ䩳ⱘ⺕ᇐ⥛µ2Ў䗔⺕ৢt2ߚ䩳ⱘ⺕ᇐ⥛12.Disaccommodationfactor,DFThisisthefactorrepresentingthevariationofpermeabilitythroughtimeafteracompletedemagnetizationofthecoreataconstanttemperature.12211221FTTµ1TTlogµ-µD!xWhereµ1:permeabilityt1minutesaftercompletedemagnetization.µ2:permeabilityt2minutesaftercompletedemagnetization.13.⬉䰏⥛ȡ(ȍ/m)݋᳝ऩԡ៾䴶⿃੠ऩԡ䭓ᑺⱘ⺕ᗻᴤ᭭ⱘ⬉䰏DŽ13.Electricalresistivity,ȡ(ȍ/m)Thisistheelectricalresistanceperunitlengthandcross-sectionalareaofamagneticcore.14.ᆚᑺd(kg/m3)ऩԡԧ⿃ᴤ᭭ⱘ䞡䞣ˈेd=W/VᓣЁWЎ⺕㢃ⱘ䞡䞣(kg)VЎ⺕㢃ⱘԧ⿃(m3)14.Density,d(kg/m3)Thisistheweightperunitvolumeofamagneticcoreasexpressedbelow:d=W/VWhereW:weightofmagneticbody(kg)V:volumeofmagneticbody(m3)15.ࡳ⥛ᤳ㗫Pc(kW/m3ǃW/kg)⺕㢃೼催⺕䗮ᆚᑺϟⱘऩԡԧ⿃ᤳ㗫៪ऩԡ䞡䞣ᤳ㗫DŽ䆹⺕䗮ᆚᑺৃ㸼⼎ЎAeNf4.44EBmᓣЁEЎᮑࡴ೼㒓೜Ϟⱘ⬉य़᳝ᬜؐ(V)BmЎ⺕䗮ᆚᑺⱘዄؐ(T)15.PowerlossPc(kW/m3ǃW/kg)Powerlossdenotesthelossbyanelectricaltransformer,suchasaswitchingpowersupply,underamagnetizationconditionfeaturingahighfrequencyandlargeamplitude.Operatingmagneticfluxdensityisgivenbythefollowingequation.1、术语及定义fЎ乥⥛(Hz)NЎ㒓೜᭄ࣱAeЎ᳝ᬜ៾䴶⿃(m2)AeNf4.44EBmWhereE:voltageeffectivevalueappliedtocoilBm:peakvalueofmagneticfluxdensityf:frequency(Hz)N:numberofcoilturnsAe:effectivecross-sectionalarea(m2)16.⬉ᛳ಴᭄AL(nH/N2)⬉ᛳ಴᭄ᅮНЎ݋᳝ϔᅮᔶ⢊੠ሎᇌⱘ⺕㢃Ϟ↣ϔࣱ㒓೜ѻ⫳ⱘ⬉ᛳ䞣ˈेAL=L/N2ᓣЁLЎ㺙᳝⺕㢃ⱘ㒓೜ⱘ⬉ᛳ䞣(H)NЎ㒓೜᭄ࣱ16.InductancefactorAL(nH/N2)Thisistheinductanceperturnofthecoilwoundaroundtheferritecoreswithdefiniteshapeanddimension.AL=L/N2WhereL:inductanceofthecoilwithferritecore.N:turnsofthecoil2、材料特性参数zMn-Zn䪕⇻ԧMn-ZnFerritesᓔ݇⬉⑤বय़఼⫼ࡳ⥛䪕⇻ԧᴤ᭭PowerferritematerialsforSMPSඋ໿Characteristics׸ۜSymbolӦสUnitJP2JP3JP4AJP4BJP5߱ྟ⺕ᇐ⥛Initialpermeabilityµi3000±25%2500±25%2300±25%2400±25%1400±25%Ⳍᇍᤳ㗫಴᭄Relativelossfactortanį/µi×10-6425ć480510510510485100ć400390390佅੠⺕䗮ᆚᑺSaturationfluxdensityBsmT(800A/m)(1194A/m)(1194A/m)(1194A/m)(1600A/m)࠽⺕RemanenceBrmT120117110190⶿乑࡯CoercivityHcA/m1612133525ćİ12*60ćİ11*80ćࡳ⥛ᤳ㗫Powerloss(f=16kHz,B=150mT)PckW/m3100ćİ12*25ć13060ć9080ćࡳ⥛ᤳ㗫Powerloss(f=25kHz,B=200mT)PckW/m3100ć10025ć70065060060ć50050040080ć430100ć600400300ࡳ⥛ᤳ㗫Powerloss(f=100kHz,B=200mT)PckW/m3120ć38025ć13060ć8080ćࡳ⥛ᤳ㗫Powerloss(f=500kHz,B=50mT)PckW/m3100ć80ሙ䞠⏽ᑺCurietemperatureTcć˚200˚230˚235˚230˚240⬉䰏