磁耦合谐振式无线电能传输的基本特性研究.doc

磁耦合谐振式无线电能传输的基本特性研究摘要近些年，无线电能传输技术受到了越来越广泛的关注。作为一种新型的无线电能传输方式，磁耦合谐振式无线电能传输技术具有传输功率大、传输距离远、能量传输效率高、穿透性强，以及无方向性等特点。目前，磁耦合谐振式无线电能传输距离为几十厘米，传输效率可以达到90%，传输功率可以达到瓦级。通过对磁耦合谐振式无线电能传输的基本特性的深入研究，可扩大传输范围、增强传输效率，具有重要的研究价值和实用价值。本文首先利用耦合模理论分析了磁耦合谐振式无线传能的机理，然后建立等效模型，在理论上研究了系统的频率特性并得到了频率分裂现象的规律，接着由频率特性进一步推导得到了系统的距离（包括轴向和径向距离）特性和方向特性。为了进一步验证理论分析的正确性，本文设计了磁耦合谐振式无线传能的实验系统，具体包括：信号源、功率放大器、发射与接收系统以及整流调压电路等。利用实验电路对本文所提理论进行实验验证，包括频率、距离、方向等特性实验，实验结果与理论分析具有较好的一致性，证明了设计方案的有效性。关键词：无线电能传输；磁耦合谐振；频率特性；距离特性；方向特性ABSTRACTInrecentyears,moreandmorewidelyattentionhasbeenpaidtowirelesspowertransmissiontechnology.Asanewtypeofwirelesspowertransmissiontechnology,wirelesspowertransfertechnologyviamagneticresonancecouplinghasthecharacteristicsofahighertransferpower,alongertransferdistanceandaveryhigherefficiency,andwhichcanbenearlynon-directionalandbeabletogothroughvariousnon-metallicobjects.Atpresent,magneticcouplingresonantwirelesspowertransmissiondistancecanbefromscoresofcentimeterstoseveralmeters,transmissionefficiencycanreach90%,andtransmissionpowercanreachwattgrade.Viathein-depthstudyonthebasiccharacteristicofthemagneticcoupledresonantwirelesspowertransfer,wecanexpandthescopeoftransport,andenhancethetransportefficiency,whichhasimportantresearchvalueandpracticalvalue.Firstlythispaperhadbeenstudiedthemechanismofwirelesspowertransferviamagneticresonancecouplingbyusingthecoupledmodetheory,thenitwastheoreticalstudiedthefrequencycharacteristicsofthesystemandthefrequencysplittingphenomenaviaestablishingtheequivalentmodel.Followedbythefrequencycharacteristicswerethesystem'sdistance(includingtheaxialandradialdistance)characteristicsanddirectioncharacteristics.Inordertoverifythecorrectnessoftheoreticalanalysis,thispaperhadalsobeendesignedtheexperimentsystemofmagneticcouplingresonantwirelessenergytransfer,itspecificallyincluded:signalsource,poweramplifier,transmittingandreceivingsystem,andarectifyingvoltageregulatingcircuit.Thetheoryproposedonthispaperwasverifiedbyexperimentsonthecircuitsoftheabovedesign,whichincl