无线充电是如何工作的.pptx

无线充电是如何工作的,Disclaimer:ThepurposeofthisinformationistoexplainthewirelesspowertechnologyItcandifferinsomeaspectsfromthespecification.,Target,MainapplicationBatterycharging,orothersuitableloadsForwiderangeofmobiledevicesMobilephone,camera,mp3player,headset,Upto5WofpowerdeliveryMorepoweratlaterversionsPowertransferviamagneticinductionLooselycoupledtransformerAtshortdistance(fewmm),2,BaseStation,Transmitter,Transmitter,SystemOverview(TopView),BaseStationContainsone,ormoretransmittersTransmitterprovidespowertoreceiverMobileDeviceContainsareceiverthatprovidespowertoaload(e.g.abattery)Receiverprovidescontrolinformationtotransmitter,3,MobileDevice,Receiver,Transmitter,Load,System,Power,Control,BaseStation,Transmitter,Transmitter,SystemOverview(PowerConversion),PowerConversionUnitconvertselectricalpowertowirelesspowersignalPowerPickupUnitconvertswirelesspowersignaltoelectricalpower,4,MobileDevice,Receiver,Transmitter,Load,System,Power,Control,BaseStation,Transmitter,Transmitter,SystemOverview(Control),ReceivercontrolsthepowertotheoutputloadTotheneedofthemobiledevice(requiredpower)Tothedesiredoperationpoint(e.g.outputcurrent,voltage)TransmitteradaptspowertransferTotheneedofthereceiver(requiredpower)Tothedesiredoperationpoint(e.g.primarycoilcurrent),5,MobileDevice,Receiver,Transmitter,Load,System,Power,Control,Control,Control,BaseStation,Transmitter,Transmitter,SystemOverview(Communication),ReceiversendsmessagesToprovidecontrolinformationtothetransmitterByloadmodulationonthepowersignalTransmitterreceivesmessagesToreceivecontrolinformationfromthereceiverByde-modulationofthereflectedload,6,MobileDevice,Receiver,Transmitter,Load,System,Power,Control,Control,Messages,Comm,Comm,ReflectedLoad,Mod,DeMod,PowerConversion,PowerConversion(Transmitter),Primarycoil(Lp)+serialresonancecapacitor(Cp)Inverter:e.g.halfbridgeCoilarrayimplementationControlledbye.g.frequencyorvoltage,7,PowerConversion,Freq,Freq,PowerPickupUnit,PowerPickUp(Receiver),Secondarycoil(Ls)Serialresonancecapacitor(Cs)forefficientpowertransferParallelresonancecapacitor(Cd)fordetectionpurposesRectifier:fullbridge(diode,orswitched)+capacitorOutputswitchfor(dis-)connectingtheload,8,Cs,Cd,Transmitter,Receiver,Communication(Modulation),ReceivermodulatesloadbySwitchingmodulationresistor(Rm),orSwitchingmodulationcapacitor(Cm)Transmitterde-modulatesreflectedloadbySensingprimarycoilcurrent(Ip)and/orSensingprimarycoilvoltage(Vp),9,Cd,Ls,Cs,C,9,Ip,Load,Power,Communication(Data-Format),Speed:2Kbit/sBit-encoding:bi-phaseByteencoding:Start-bit,8bitdata,parity-bit,stop-bitPacketStructurePreamble(=11bit)Header(1Byte)IndicatespackettypeandmessagelengthMessage(1.27Byte)OnecompletemessageperpacketPayloadforcontrolChecksum(1Byte),10,0.5ms,Communication&Control,StartTransmitterprovidessignalandsensesforpresenceofanobject(potentialreceiver)ReceiverwaitsforsignalPingReceiverindicatespresencebycommunicatingreceivedsignalstrengthTransmitterdetectsresponseofreceiverIdentification&ConfigurationReceivercommunicatesitsidentifierandrequiredpowerTransmitterconfiguresforpowertransferPowerTransferReceivercommunicatescontroldataTransmitteradaptspowertransfer,11,EndTransfer/Error/Timeout,EndTransfer/SignalLost,PowerTransferControl,12,TransmitterInterpretdesiredcontrolpointfromControlerrormessageActualcontrolpointAdaptpowertowardszerodifferencebetweenDesiredcontrolpointActualcontrolpoint,ReceiverCalculatecontrolerror=differencebetweenDesiredcontrolpointActualcontrolpointCommunicatecontrolerrormessage,Receiver,Transmitter,Load,Power,Actual,Actual,Desired,ControlErrorMessage,CouplingbetweenCoils,GoodCouplingbetweencoilsisachievedbyChoosingappropriatedimensionsofcoils(matchingsize)Keepingthedistancebetweencoilssmall(flatinterfacesurface)Addingmagneticpermeablematerial(shielding)Aligningthecoils(nextpage),13,RxSurface,Shielding,Shielding,TxSurface,Distance,FreePositioning(MovingCoil),CoilAlignment(DesignFreedom),14,FreePositioning(CoilArray),SingleCoil,x,y,SinglecoilmanualpositioningFreepositioningwithmovingcoilFreepositioningwithselectiveactivationofcoilsincoilarray,StandbyPower,TransmittercanenterstandbypowermodewhenNodeviceispresent,orpresentdevicesneednopower(batterycharged)TransmittercanapplyvariousmethodstoreactonareceiverCapacitancechangeTodetecttheplacementofapotentialreceiverE.g.0.1mWResonancedetection,or