摘要本文设计了一种高功率因数、低电磁干扰的单级CCM-BOOST功率因数校正电路。首先对有源功率因数校正电路进行了详细的分析。基于对有源功率因数校正电路的双级式和单级式结构的特点比较，本文采用了单级式的电路结构。选择Boost电路为有源功率因数校正电路的主电路，给出了Boost电路的组成并分析了它的工作过程。在此基础上本文采用连续导电工作模式(CCM)和平均电流控制策略，并应用DSP作为有源功率因数校正电路的控制芯片。对TMS320LF2407A芯片的工作原理及各引脚功能作了介绍，对相应的控制部分的控制输入、乘法器、电压环和电流环部分进行了详细的分析。最后，在上述对有源功率因数校正电路做了优化基础上，在输入电压为市电220V/50Hz条件下，对有源功率因数校正电路进行优化，输出400V直流电，并应用MATLAB软件进行了仿真计算。关键词：功率因数校正PFC技术；MATLAB仿真；Boost电路AbstractAsinglestageCCM-BOOSTpowerfactorcorrectioncircuitwithhighpowerfactorandlowelectromagneticinterferenceisdesignedinthispaper.Firstofall,theactivepowerfactorcorrectioncircuitisanalyzedindetail.Basedonthecomparisonofthetwostageandsinglestagestructuresoftheactivepowerfactorcorrection(APFC)circuit,asinglestagecircuitisadoptedinthispaper.TheBoostcircuitisselectedasthemaincircuitoftheactivepowerfactorcorrectioncircuit,andthecompositionoftheBoostcircuitisgivenanditsworkingprocessisanalyzed.Onthisbasis,thecontinuousconductionmode(CCM)andtheaveragecurrentcontrolstrategyareadoptedinthispaper,andDSPisusedasthecontrolchipofactivepowerfactorcorrectioncircuit.TheworkingprincipleofTMS320LF2407Achipandthefunctionsofeachpinareintroduced.Thecontrolinput,multiplier,voltageloopandcurrentlooppartofthecontrolpartareanalyzedindetail.Finally,basedontheaboveoptimizationofactivepowerfactorcorrectioncircuit,theactivepowerfactorcorrectioncircuitisoptimizedundertheconditionofinputvoltageof220V/50Hz,and400VDCpowerisoutput,andthesimulationiscarriedoutbyusingMATLABsoftware.Keywords:powerfactorcorrection(PFC)PFCtechnology;MATLABsimulation;Boostcircuit目录摘要......................................................................................................................................IAbstract............................................................................................................................................II1、前言..............................................................................................................................11.1研究背景及意义.......................................................................................11.2研究价值............................................................................................................11.3国内外研究现状.......................................................................................11.4研究方法............................................................................................................32、基于DSP的PFC数字系统采样硬件设计............................42.1数字控制平台选取及外围电路设计...............................42.1.1DSP控制器的选用.............................................................................42.1.2时钟模块硬件电路......................................................................62.1.3复位电路..................................................................................................72.1.4DSP控制器晶振电路......................................................................82.2数字控制器的主电路设计..................................
