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1、HighFrequencySwitchPowerSupplyAbstract:In1955AmericanLuo(GH.Roger)createdoftheautooscillationspushWantransistorunipoletransformerd.c.transformthemachineistheinitialzingthatcompleteshighfrequencyconvertcontrolcircuit,theUnitedStatescheckedamatch(Jensen)tocreatedin1957thedoubleisfromthearouse
2、typepushWantransformer,Americanthescientistsproposetocancelworkrepeatedlytheimaginationoftheestablishingoftransformerswitchpowersupplyin1964,thisobtainedastandardpathtothelandingofthevolumeandtheweighttopowersupply.1969becausethebigpowerHuobearingoftransistorpressesaprogress,shortenningofdi
3、odereversedirectionrecoverytimeetc.kyatsparepartimprovement,finallymadeintoswitchpowersupplyof25kilohertzs.Currently,switchpowersupplywithsmallscaled,lightquantityandhigh-efficiencycharacteristicarewidespreadlybeenappliedtotakecomputerasapredominanceofvariousterminalequipment,andcommunicati
4、ons-equipment...etc・absolutelythewholeelectronequipmentsareakindofpowersupplymethodthattheelectroninformationindustryfliestosoondeveloptoshortofnowadays.Currentlyonthemarketonofferofadoptduotriodeinswitchpowersupplythetransistormakesintoof100khzs,usethe500kHzthattheMOS-FETmakesintopowersupp
5、ly,althoughhavealreadyappliedtoturn,itsfrequencyneedsafurtherprogress.Toprogressswitchfrequencywillreduceswitchloss,butwanttoreduceswitchloss,thereistopspeedswitchkyatforthedemandsparepart.But,theswitchvelocitywillbesubjectedtospreadtostoreimpactbutcreationwaveofchargetoflowoutininductancea
6、ndcapacitanceordiodeinthetelephoneafterprogressingorZaovoice.Thus,antiwilleffectanelectronequipmentonallsidesandalsoconsumedlylowerthefirmandreliableofpowersupplyoneself.Amongthem,foravoidwiththeswitchQi-shutgointoactionofthevoltagewaveflowout,canadoptR-CorL-Cbuffer,butvsfromdiodestoragecha
7、rgetooftheelectricitydriftonwatertoflowouttoadoptthemagneticbeltbufferthatmagneticbeltXinslikenot・crystalstate,etcmakesinto.However,vs1MHzabovehighfrequency,adopttheresonancecircuitopensbymakingthecurrentofvoltageorprocessswitchopeningtopresentsinewave,s
