基于UC3854的功率因数校正电路设计

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1、学号14052101086毕业设计（论文）题目：基于UC3854的功率因数校正电路设计作者佘杨滨届别2009届系别机械与电气工程系专业自动化指导教师荣军职称讲师完成时间2009年5月21日毕业设计（论文）摘要本文介绍了功率因数校正Boost变换器的基本工作原理和Boost变换器常用控制芯片UC3854的工作原理，设计了基于UC3854的Boost变换器的控制电路。该电路采用平均电流模型，它通过脉宽调制输出的一连串脉冲信号来控制电路中开关晶体管的导通与截止,从而将输入电流与输出电压的相位重新调整到同相的状态,最终达到功率因数校正的目的。通过比较和分析得知，该电路

2、在有源功率因数校正方面有着结构简单，适应范围广等优点。关键词：有源功率因数校正（PFC）；Boost控制电路；UC3854I毕业设计（论文）ABSTRACTThispaperintroducesthePowerFactorCorrectionBoostconverter'sbasicworkingprincipleandtheworkingprincipleofcommoncontrolchipUC3854ofBoostconverter,designingthecontrolcircuitwhatbasedontheUC3854ofBoostconverte

3、r.Usingtheaveragecurrentmodel,UC3854controlsthestateoftheswitchingtransistorinthecircuitbyoutputtingaseriesofPWM(PulseWidthModulation)signals.Bythismean,itreadjustsinputcurrentandoutputvoltagetosynchronization,thusfulfillingpowerfactorcorrection.Throughcomparisonandanalysisweknowtha

4、tthecircuitintheactivepowerfactorcorrectionhasasimplestructureandwiderangeadaptionandsomanyadvantages.Keywords:activepowerfactorcorrection(PFC);boostcontrolcircuit;UC3854II毕业设计（论文）目录摘要...................................................................................................

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7、...............................................................11.1开关电源概述.......................................................................................................................................................21.2谐波电流对电网的危害.............................................

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