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1、碩士論文LED照明驅(qū)動電源研究與實現(xiàn)摘要本文的工作是設(shè)計一款可調(diào)光LED照明驅(qū)動電源,并進行仿真和調(diào)試。本文首先介紹了LED照明的知識背景,然后介紹了驅(qū)動電源的五種常用的直流變換電路。本文研究了可控硅調(diào)光,并分析了四種調(diào)光兼容方案。本文還研究了功率因數(shù)校正和電磁兼容的工程方法。根據(jù)設(shè)計需求,本文選用反激變換器和單級PFC作為驅(qū)動電源的拓撲,驅(qū)動電源工作于電流斷續(xù)模式并采用峰值電流控制方式?;贏Pl682,本文著重設(shè)計了功率因數(shù)校正功能和反激變壓器,為提高可靠性,變壓器中增加了RCD箝位電路。本文
2、還設(shè)計了EMI濾波電路、輸出濾波電路、線性補償電路和空載保護電路。最后,本文針對調(diào)光兼容問題,設(shè)計了阻尼電路、泄放電路以及深度調(diào)光電路?;赟aber,本文對單級PFC反激變換器進行了仿真,分析了功率因數(shù)校正功能,分析了變壓器、開關(guān)管、副邊功率二極管的工作情況,分析了EMI濾波電路的工作效果?;贚TspiceIV,在不同的充電電阻下,本文對可控硅調(diào)光器的輸出電壓波形進行了仿真。本文對驅(qū)動電源實物進行調(diào)試,分析了功率因數(shù)校正功能、輸出電流線性調(diào)整率和負載調(diào)整率、功率器件的工作情況、電磁兼容效果。接
3、入調(diào)光器后,本文測試了調(diào)光曲線并驗證了深度調(diào)光的效果。關(guān)鍵詞:LED驅(qū)動電源,反激,單級PFC,可調(diào)光,Saber仿真,LTspiceIV仿真Abstract碩士論文AdimmableLEDlightingdrivepowerisdesigned,simulatedanddebugged.BackgroundknowledgeofLEDlightingandfivecommonDCconvertorsareintroduced.TRIACdimmingandfourdimmingcompatibl
4、esolutionsareanalyzed.PowerfactorcorrectionandEMCengineeringmethodsareresearched.Accordingtothedesignrequirements,flybackconvenerandsingle—stagePFCareselectedasthedrivepowertopology.Thedrivepowerworksindiscontinuouscurrentmodeandusespeakcurrentcontrol
5、mode.PowerfactorcorrectionandflybacktransformersaredesignedbasedonAP1682andRCDclampcircuitisaddedforreliability.EMIfilter,outputfiltercircuit,linearcompensmioncircuitandno—loadprotectioncircuitaredesignedalso.Finally,dampercircuit,bleedercircuitanddee
6、pdimmingcircuitaredesignedtosolutedimmingcompatibleproblems.Single—stagePFCflybackconverterissimulatedbasedonSaber,powerfactorcorrection,transformer,switch,secondarypowerdiode,EMIfilterareanalyzed.Withdifferentchargeresistors,TRIACdimming’Soutputvolta
7、geisaresimulatedbasedonLTspiceIV.Realdrivepowerisdebuggedandpowerfactorcorrection,outputcurrentline/loadregulation,powerdevicesandEMCeffectareanalyzed.Connectingadimmer,dimmingcurveisplottedanddeepdimmingareverified.Keyword:LEDdrivepower,flyback,singl
8、e—stagePFC,dimmable,Sabersimulation,LTspiceIVsimulationII碩士論文LED照明驅(qū)動電源研究與實現(xiàn)目錄摘蘭要?。?.?.。???????..??。。。...?。。。。。。。。。。。.。。。。.....??????.IAbstract??.?.??..............................................................................................