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1、BasicStudyofImprovingEfficiencyofWirelessPowerTransferviaMagneticResonanceCouplingBasedonImpedanceMatchingTeckChuanBeh*,TakehiroImura*,MasakiKato**YoichiHori***DepartmentofElectricalEngineering**DepartmentofAdvancedEnergyTheUniversityofTokyo,Tokyo,JapanE-mail:beh@horilab.iis.u-toko.ac.jp,i
2、mura@horilab.iis.u-toko.ac.jp,kato@horilab.iis.u-toko.ac.jp,hori@horilab.iis.u-toko.ac.jpexample,thepowertransmittingantennacanbeplacedintheAbstract-Wirelesspowertransferisessentialforthespreadofcarpark,andthereceivingantennacanbeplacedinthecar.ElectricVehicle(EV)usageasitprovidesasafeandc
3、onvenientThisenablestheEVtobechargedwirelesslyjustbybeinginwaytochargetheEVs.Recently,ahighlyefficientmid-rangetheparkingbox.Toachievethis,thewirelesspowertransferwirelesspowertransfertechnologyusingelectromagneticsystemmustsatisfythesethreeconditions:highefficiency,resonancecoupling,WiTri
4、city,wasproposed.Studiesshowthattheresonantfrequenciesofthetwoantennaschangeaccordinglargeairgaps,andhighpower.totheairgapinbetweentheantennas.ToachievemaximumPresently,themostpopularwirelesspowertransferefficiencyusingthissystem,theresonancefrequenciesofthetechnologiesaretheelectromagneti
5、cinduction,andtheantennasandthefrequencyofthesystemhastobematched.microwavepowertransfer.However,theelectromagneticHowever,whenthistechnologyisappliedintheMHzrangeinductionhasashortrange[5],andmicrowavepowertransfer(whichallowssmallsizedantennas),theusablefrequencyisboundedbytheIndustrial,
6、Scientific,andMedical(ISM)band.hasalowefficiencyasitusesradiation.Recently,ahighlyHenceamethodtofixtheresonancefrequencywithintheISMefficientmid-rangewirelesspowertransfertechnologyusingbandisrequired.Inthispaper,thepossibilityofusingelectromagneticresonancecoupling,WiTricity,wasproposed.i
7、mpedancematching(IM)networkstoadjusttheresonanceItsatisfiesallthreeconditionstomakewirelesslychargingfrequencyofapairofantennasatacertaindistancetoEVspossibleasithasahighefficiencyatmidrange13.56MHzisstudied.Westudiedtheelectricalcharacteristicsoftheantennawit
