通电空心线圈系统产生的磁场分析

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1.,100084;2.,518055):,,,,::;;;Ansoft;;:TM835:A:100326520(2009)1122735206:(59577016)ProjectSupportedbyNationalNaturalScienceFoundationofChina(59577016).AnalysisonMagneticFieldDistributionGeneratedbyAxisymmetricHollowCoilsSystemsGUANZhi2cheng1,2,SUHua2feng1,JIAZhi2dong1,2(1.DepartmentofElectricalEngineeringandAppliedElectronicTechnology,TsinghuaUniversity,Beijing100084,China;2.GraduateSchoolatShenzhen,TsinghuaUniversity,Shenzhen518055,China)Abstract:Magneticfieldgeneratedbyaxissymmetriccoilsiswidelyappliedinmanymedicalphysiotherapyappara2tuswherethemagneticfieldonthesurfaceofthecoilsorinsidethecoilsisemployed,andappropriatearrangementofthecoilshelpsimprovethehomogeneityofthemagneticfield,whichaffectsthetherapyresults.Conclusionsaredrawnthatoptimalhomogenousmagneticfieldscanbedevisedwhenthediametersofthecoilsandthedistancesbe2tweenthemfiteachotherontheanalysisofthereasonabilityofthecoilsmagneticfield.Keywords:axissymmetriccoils;magneticfielddistribution;finite2element;Ansoft;PEMF;homogeneityofthemagneticfield0[1,2][326],,,,,,,,,,,,,:,[729],,,1,Ansoft[10,11],1.11,1000,0.5A1z,5372351120091130HighVoltageEngineeringVol.35No.11Nov.30,2009©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[5],,3,,,3,D,21.36,,6,,zL,3322.14,4300mm300mm,0.5A;,;,4zB,z,300mmz,Br,,2030mmz,B,zB,B,,2.25,z,Br,,2030mmz,B,zB,B,,B1Fig.1Modelofonecoil2Fig.2Modelofseveralcoilsarrangedinarow3Fig.3Modelofseveralcoilsarrangedintworows4Fig.4Fluxdensitycurveofonecoil,z,B5(a)D=120mm6372Nov.2009HighVoltageEngineeringVol.35No.11©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(b)D=150mm,5,5(a)5(b),,,,2.36,L=150mm,D=150mm6(a)6(b),,,,,2.4:1),,6Fig.6Fluxdensityoutsideofthecoils7Fig.7Modelofonecoils2),,,33.1,,,7,1000,1A7z,73722009113511©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Helmholtz),29,10050100150200250300350400mm93000mm,1500mm,,150mm,,150mm300mm,,,,150mm,300mm,,9Fig.9Modeloftwocoils10Fig.10Fluxdensitybetweentwocoils11Fig.11Areaofhomogenousfluxdensitybetweentwocoils112300mm,150mm,,,8372Nov.2009HighVoltageEngineeringVol.35No.11©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[12215]4,12,41000,21A,22.26A13050100150200250300350400mm93000mm,1500mm,,150mm,,150mm900mm,,,,150mm,900mm,,241441900mm,150mm3.4134Fig.13Fluxdensitybetweenfourcoils144Fig.14Areaofhomogenousfluxdensitybetweenfourcoils,,,442,,,4,,93722009113511©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1]CaiXiaoding.Uniformmagneticfieldgeneratedbytwoorthogo2nalsheetcurrentloops[J].IEEETransactionsonElectromag2neticCompatibility,1989,31(3):2092217.[2]CvetkovicD,CosicI.Modellinganddesignofextremelylowfrequencyuniformmagneticfieldexposureapparatusforinvivobioelectromagneticstudies[C]Proceedingsofthe29thAnnualInternationalConferenceoftheIEEEEMBSCiteInternationale.Lyon,France:IEEE,2007.[3],,,.[J].,2007,33(2):126.GUANZhi2cheng,YANGXiao2wei,WANGLi2ming,etal.Bio2effectsofpulsedelectromagneticfieldsonosteoporosis[J].HighVoltageEngineering,2007,33(2):126.[4],,,.[J].,2007,33(2):972100.YANGXiao2wei,WANGLi2ming,GUANZhi2cheng,etal.Preventiveeffectsofpulsedelectromagneticfieldsonosteoporo2sismodelinducedbyovariectomy[J].HighVoltageEngineer2ing,2007,33(2):972100.[5],,.IPM[J].,2002,21(2):61263.SONGTing,LIUYing2yan,GUANZhi2cheng.Pulsedelectro2magneticfieldssystembasedonIPM[J].AdvancedTechnologyofElectricalEngineeringandEnergy,2002,21(2):61263.[6],,,.[J].,2002,28(12):37238.LIUYing2yan,MAOJing,GUANZhi2cheng.Theapplicationofbiofilmselectroporation[J].HighVoltageEngineering,2002,28(12):37238.[7]BellGB,MarinoAA.Exposuresystemforproductionofuni2formmagneticfields[J].JournalofBioelectricity,1989,8(2):1472158.[8]WangJ,SheS,ZhangS.Animprovedhelmholtzcoilandanaly2sisofitsmagneticfieldhomogeneity[J].TheReviewofScientif2icInstruments,2002,73(5):217522179.[9],.Ansoft[M].:,2005.[10].[M].:,1991.LEIYin2zhao.Axisymmetriccoilmagneticfieldanalysis[M].Beijing:ChinaMetrologyPress,1991.[11]PittmanME,WaidelichDL,Aerospace.Threeandfourcoilsystemsforhomogeneousmagneticfields[J].IEEETransac2tionsonMagnetics,1964,2(1):36245.[12]BassettCAL,PillaAA,PawlukRJ.Anon2operativesalvageofsurgically2resistantpseudarthrosesandnon2unionsbypul2singelectromagneticfields:apreliminaryreport[J].ClinOr2thop,1977,124:1282143.[13]FriedenbergZB.Bonereactiontovaryingamountsofdirectcurrent[J].SurgGynecObstet,1970,131:8942899.[14]BrightonCT.Direct2currentstimulationofnon2unionandcon2genitalpseudarthrosis.Explorationofitsclinicalapplication[J].JBoneJointSurg,1975,57(3):3682377.[15]BrightonCT,PollackSR.Treatmentofrecalcitrantnon2u2nionwithacapacitivelycoupledelectricalfi