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1、UniversityofScienceandTechnologyLiaoning畢業(yè)設(shè)計(jì)論文題目：小型高頻開關(guān)電源的設(shè)計(jì)學(xué)院：電子與信息工程學(xué)院班級(jí)：自動(dòng)化2011-6IV遼寧科技大學(xué)本科生畢業(yè)設(shè)計(jì)第頁(yè)小型高頻開關(guān)電源的設(shè)計(jì)摘要在各種電力電子設(shè)備中，開關(guān)電源作為其供電裝置必不可少。一個(gè)完整的開關(guān)電源系統(tǒng)主要由輸入電路、開關(guān)變換器、變壓器、輸出電路、控制電路等幾部分組成，將交流輸入電轉(zhuǎn)換成電力電子設(shè)備所需的直流電。現(xiàn)階段開關(guān)電源主要向高頻化、集成化、智能化等方向發(fā)展，對(duì)電力電子設(shè)備性能的提高扮演了舉足輕重的角色。本文針對(duì)電動(dòng)汽車電驅(qū)動(dòng)系統(tǒng)的電源需求，設(shè)計(jì)一款小
2、型高頻開關(guān)電源，以期實(shí)現(xiàn)寬范圍電壓輸入和多路隔離輸出的問(wèn)題。選擇單端反激式拓?fù)?，高頻變壓器采用耦合方式實(shí)現(xiàn)小型開關(guān)電源的多路隔離輸出?；趩味朔醇な阶儞Q器原理及電流型PWM控制芯片，本文設(shè)計(jì)了一個(gè)單端反激式多路輸出小型高頻開關(guān)電源，主要介紹了單端反激變換器、RCD箝位電路、UC3842芯片、電壓及電流反饋電路的設(shè)計(jì)過(guò)程。關(guān)鍵詞：開關(guān)電源；單端反激式變換器；高頻變壓器；電流型PWM控制；UC3842IV遼寧科技大學(xué)本科生畢業(yè)設(shè)計(jì)第頁(yè)SmallHigh-frequencySwitchingPowerSupplyDesignAbstractInvariouspow
3、erelectronicdevices,switchingpowersupplydeviceasplayinganimportantrole.Acompleteswitchingpowersupplysystemconsistsofaninputcircuit,switchingconverters,transformers,outputcircuit,acontrolcircuitcomposedofseveralparts,theACinputpowerisconvertedintodirectcurrentrequiredtopowerelectron
4、icdevices.Atthisstagemainlytothehigh-frequencyswitchingpowersupply,integration,intelligenceandotherdirection,toimprovetheperformanceofpowerelectronicsplayedapivotalrole.Inthispaper,thepowerrequirementsoftheelectricvehicleelectricdrivesystem,asmallhigh-frequencyswitchingpowersupplyd
5、esign,inordertoachieveawiderangeofinputvoltageproblemandmulti-channelisolationoutput.Choosesingle-endedflybacktopology,high-frequencytransformercouplingachievesmallswitchingpowersupplymulti-channelisolationoutput.Basedonasingle-endedflybackconverterprincipleandcurrentmodePWMcontrol
6、chip,thearticlegivesasingle-endedflybackmulti-outputcompacthigh-frequencyswitchingpowersupplydesign,introducedtheflybacktransformer,RCDclampcircuit,UC3824startcircuit,voltagefeedbackcircuitandcurrentfeedbackcircuitdesignprocess.Keywords:switchingpowersupply;single-endedflybackconve
7、rter;high-frequencytransformers;current-modePWMcontrol;UC3842IV遼寧科技大學(xué)本科生畢業(yè)設(shè)計(jì)第頁(yè)目錄1緒論11.1高頻開關(guān)電源概述11.1.1高頻開關(guān)電源的特點(diǎn)11.1.2高頻開關(guān)電源技術(shù)發(fā)展方向11.2選題背景21.3本文主要研究?jī)?nèi)容32高頻開關(guān)電源的工作原理42.1高頻開關(guān)電源的基本原理42.2開關(guān)電源的技術(shù)參數(shù)52.2.1輸入技術(shù)參數(shù)52.2.2輸出技術(shù)參數(shù)62.3開關(guān)電源的變換器72.3.1單端正激式結(jié)構(gòu)72.3.2單端反激式結(jié)構(gòu)82.3.3半橋式電路結(jié)構(gòu)82.3.4全橋式電路結(jié)構(gòu)92.3.
8、5推挽式電路結(jié)構(gòu)93單端反激式變換器113.1單端反
