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基于磁耦合谐振无线能量传输系统传输效率的研究.docx

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基于磁耦合谐振无线能量传输系统传输效率的研究 Abstract: Wirelesspowertransfertechnologyhasbeenwidelyusedinrecentyearsduetoitsconvenienceandsafety.However,theefficiencyofwirelesspowertransfersystemsisalwaysaconcernforresearchers.Inthispaper,themagnetic-couplingresonantwirelessenergytransfer(MCR-WET)systemisintroducedanditsworkingprincipleisanalyzed.Furthermore,factorsaffectingtheefficiencyofthissystemarediscussedandseveraloptimizationmethodsareproposed. Introduction: Withthedevelopmentoftechnology,wirelesspowertransferhasbecomeapopularresearchtopic.Wirelesspowertransferisatechnologythatenableselectricenergytobetransmittedthroughtheair.Comparedtotraditionalwiredpowertransmission,wirelesspowertransferhasadvantagessuchasconvenience,safety,andreducedwearandtearonthetransmittingandreceivingdevices.Amongvarioustypesofwirelesspowertransfer,magnetic-couplingresonantwirelessenergytransfer(MCR-WET)isapromisingtechnologyduetoitslong-distancetransmission,highefficiency,andlowEMI(ElectromagneticInterference)andSAR(SpecificAbsorptionRate)values. Magnetic-couplingresonantwirelessenergytransfer: TheMCR-WETsystemiscomposedoftwocoppercoils:oneasthetransmitterandtheotherasthereceiver.Bothcoilsaretunedtothesameresonantfrequencyandarepositionedincloseproximitytoeachother.Thetransmittercoilisconnectedtoapowersourceandproducesamagneticfieldthatinducesacurrentinthereceivercoil.Thereceivercoilisdesignedtomatchthetransmittercoil'sresonantfrequency,therebyachievingefficientenergytransfer.Thedistancebetweenthetwocoilsiscriticaltotheefficiencyofthesystem,andtheoptimaldistancedependsonthesizeofthecoilsandthefrequencyofoperation. EffectofparametersontheefficiencyofMCR-WET: TheefficiencyofMCR-WETdependsonseveralfactors.Onemajorfactoristhequalityfactor(Qfactor)ofthecoils,whichreflectstheamountofenergystoredinthecoilsduringresonance.AhigherQfactorindicatesahigherenergytransferefficiency.Additionally,thecouplingcoefficientbetweenthetwocoilsisalsocrucial,asitaffectstheamountofenergytransferredfromthetransmittercoiltotherecei