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1、毕业设计(论文) 题目:节能型恒流开关电源的设计与研究系别:专业:班级:学生:学号:指导教师:职称:摘要开关电源因其高效节能引起社会各方面的重视,现已成为通用开关电源、专用开关电源及特种开关电源优选集成电路。特别是在驱动LED恒流开关电源方面,发展尤其突出,因此具有很大研究价值。本毕业(论文)设计的目的就是针对LED照明应用的电源。LED照明通常用多个发光二极管组成点阵光源,为使光源发光均匀则需供电电源提供恒定电流进行驱动。在论文中,首先阐述了节能型恒流开关电源的工作原理,根据方案设计技术参数,给出了整体电路设计的理论依据;然后根据设计要求提出了整体电路的实现架构,
2、并且阐述了整体电路工作原理和子电路的性能要求。在整个电路的设计上,主要介绍了输入整流与滤波、变压器、功率开关管、控制器、保护电路、电流电压反馈网络、输出整流续流与滤波、稳压恒流输出模块。最后,本论文在整体电路原理分析和子电路设计的基础之上,应用Multisim仿真软件对子电路模块和整体电路进行功能仿真验证,仿真结果满足要求,进一步验证理论分析和设计的正确性,也是设计理论与实践相结合的一次有价值的尝试。关键词:开关电源;恒流;LEDAbstractSwitchingpowersupplyispaidmuchattentionforitshighefficiencyand
3、lowpowerconsumption.Nowitispopularusedingeneralswitchingpowersupplyspecial-purposeswitchingpowersupply,specialswitchingpowersupply.Especially,intheconstantcurrentLEDdriverswitchingpowersupply,particularlyinthedevelopmentandthereforehavegreatresearchvalue.Thegraduate(paper)isdesignedfort
4、hepurposeofthepowerLEDlightingapplications.LEDlightingisusuallyformedbyanumberofdot-matrixLEDlightsource,inorderfortheuniformLEDlightsourcewouldprovideconstantcurrentpowersupplytodrive.Inthepaper,firstofallontheenergy-savingconstantswitchingpowersupplyworks,accordingtodesigntechnicalpar
5、ameters,giventheoveralldesignofthetheoreticalbasisandinaccordancewithdesignrequirementsoftheoverallframeworkfortherealizationofcircuits,andontheoverallcircuitWorkingprinciplesandperformancerequirementsofthecircuit.Inthewholecircuitdesign,mainlyontheinputrectificationandfiltering,transfo
6、rmers,powerswitch,thecontrollercircuitprotection,currentandvoltagefeedbacknetwork,theoutputrectifiercontinuedflowandfiltering,regulatorsconstantcurrentoutputmodule.Basedonthewholecircuitprincipleanalysisandsub-blockdesign,theauthorsimulatedthesub-blockcircuitsandthewholecircuitbyapplyin
7、gthetoolMultiuse.Thesimulationresultsindicatethattheswitchingpowersupplycircuithasachievedexpectationofthefunctiontargetandtheelectricalcharacteristics.Moreover,thecircuitprincipleanalysisanddesignhasbeenverified.Althoughthereareunavoidabledisadvantagesofthisthesis,itisaworthwh