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2013年全国大学生电子设计竞赛单相AC-DC变换电路(A题)【本科组】参赛学校:江西科技师范大学参赛人员:王协平张紫祥张超指导教师:曾旺辉2013年9月2日1单相AC-DC变换电路(A题)【本科组】摘要:高功率因数电源是提高电源输入端功率因数的高性能电源,应用日益广泛。本系统采用有源功率因数校正(APFC)方法,对BOOST主电路拓扑结构的升压电路的输入电流进行控制,使其达到与输入电压同频且相位差为0,功率因数接近于1,从而实现高功率因数电源。系统采用UCC28019作为控制器,提高了电源的功率因数,具有良好的电压调整率和负载调整率,输入电流波形失真度小于5%,功率因素大于0.98,效率达到95.2%,且采用单片机对整个系统进行监测,可测量输出电压、输出电流、功率因数以及可实现输出电压自动设置等功能。系统在设计时从布局布线和滤波等方面消除电磁干扰,能够实现电压、电流、功率因数的测量及中文显示功能,界面友好美观。关键词:AC-DC转换;UCC28019;APFC;BOOSTAbstract:Thehighpowerfactorofpowersupplyisthehighperformancepowersupplythatitcanincreasethepowerinputpowerfactorwithbecomingmoreandmorewidely.Thissystemadoptstheactivepowerfactorcorrection(APFC)method,whichtocontrolfortheinputcurrentoftheboostercircuitoftheBOOSTmaincircuittopology,toattaintheinputvoltagewiththesamefrequencyandphasedifferencebeingzero,andthepowerfactorbeingcloserto1,soastorealizehighpowerfactorofpowersupply.ThesystemisusedtheUCC28019ascontrollerinordertoimprovethepowerfactorofpowersupplythatithastheexcellentvoltageregulationandtheloadregulation,andhaslessthan5%abouttheinputcurrentwaveformdistortion,andhasgreaterthan0.98aboutthepowerfactor,andtheefficiencyreachedhasmorethan95.2%.andhasadoptedthesinglechipmicrocomputertomonitorthequalityofthewholesystem,andtomeasuretheoutputvoltage,tooutputcurrent,topowerfactor,andcanbesetuptorealizeautomaticoutputvoltage,andotherfunctions.Whenthedesignfromtheaspectssuchaslayoutandfilteringtoeliminateelectromagneticinterference.theSystemcanrealizethevoltage,current,powerfactormeasurementandChinesedisplayfunctions,interfaceisfriendlyandbeautiful.Keyword:AC-DCconversion,UCC28019,APFC,BOOST2目录1.方案设计与论证.......................................................................................................................................31.1总体方案设计与比较.......................................................................................................................31.2PFC控制方案选择...........................................................................................................................51.2.1PFC控制方案分析................................................................................................................51.2.2方案选择................................................................................................................................52.理论分析...................................................................................................................................................52.1提高效率的方法..............................................................................................................................52.2功率因素调整方法..........................................................................................................................52.3稳压控制方法..................................................................................................................................63.电路参数设计及程序设计.......................................................................................................................63.1主回路器件的选择及参数计算.......................................................................................................63.2PFC控制电路及外围参数计算.......................................................................................................73.3检测与保护电路设计.......................................................................................................................83.3.1输入电压、电流相位检测电路............................................................................................83.3.2输出电压、电流测量电路....................................................................................................93.3.3输出过流保护电路................................................................................................................93.4数字设定及显示电路设计..............................................................................................................93.5辅助电源及基准的设计................................................................................................................103.6系统软件设计.................................................................................................................................104.测试方法与测试结果.............................................................................................................................114.1测试仪器........................................................................................................................................114.2测试方法及测试结果....................................................................................................................115.结论.........................................................................................................................................................12参考文献.......................................................................................................................................................12附件1:元器件明细表................................................................................................................................13附件2:电路图图纸.............................
本文标题:单相AC-DC变换电路(A题)【本科组】王协平剖析
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