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有源功率因数校正技术单相有源功率因数校正WhyTHD=95.6%,PF=0.6WhyHow无源功率因数校正简单、成本低、可靠性高、EMI小;尺寸重量大,校正效果与频率、负载和输入电压变化有关。有源功率因数校正功率因数接近1,THD小,输入电压和频率范围很宽,体积、重量小,输出电压恒定;电路复杂,成本高,EMI高。功率因数校正效果无源功率因数校正逐流电路THD30%,PF0.9有源功率因数校正电路任何一种DC-DC变换器都可以;常用boost/buck/buck-boost;按电感电流可分为连续、临界和不连续模式按控制方式可分为电流峰值、滞环、平均电流;电压型三种不同模式的电流波形不连续临界连续三种电流型控制方式的电感电流波形峰值滞环连续三种电流型控制方式比较Boost功率因数校正原理_1Boost功率因数校正原理_2UC3854A/B平均电流、恒频、连续模式UC3854校正原理临界峰值电流模式L6560/1/2L6562的应用不连续电压型功率因数校正Flyback电路EMI滤波器三相有源功率因数校正A.拓扑结构一、三个单相PFC电路组成的三相PFC电路Three-phaseZVTPFCrectifierconsistingofsingle-phaseboostconvertersExperimentalResult100kHz90V-130Vrmsinputand380Voutput1.7kWThree-phaseZVTPFCrectifierconsistingofsingle-phasesepicconverters2001-12_3ExperimentalResult100kHz200Vrmsinputand28Vdcoutput500kWTHD5%fullloadThree-phasePFCrectifierconsistingofsingle-phaseconvertersAdvantage:1.directlyusesingle-phasePFCtechniques2.goodperformanceinbalancedconditionsDisadvantage:1.interactionbetweenstages2.inputcurrentTHDisaround10%3.lowpowerstageTwo-single-stagethree-phasePFCcircuitExperimentalresult120HzripplecancelledExperimentalwaveform二、基于不控整流桥的三相PFC电路2.1boost-typethree-phasePFCcircuitsSingle-switchDCMZCTboostrectifier94-00316324ExperimentalResult50kHzIGBT170Vrmsinputand600Voutput4kWTHD=10%95.2%Single-switchDCMZVTboostrectifier94-00316324Three-phaseSVMboostrectifierMatlabsimulatedwaveformThree-phaseSVMboostrectifier-297-00618647SimulationWaveformResonantboostthree-phasePFCcircuit99-00799195Experimentalresult174kHzMOSFET220Vrmsinputand340Voutput235W97%efficiencyTHD7.8%Experimentalwaveformthree-phaseCukPFCcircuitPSPICESimulationResult120VL-L60Hzinputand400Voutput25kHz2.9kWTHD5%PF=0.99three-phaseSepicPFCcircuitZVTthree-levelboostcircuit2.2buck-typethree-phasePFCcircuitsSingle-switchVFbuckrectifierPSPICESimulationResult415Vinputand400Voutput20kHzto40kHz2.5kW95%estimatedefficiencySingle-switchQRVFbuckrectifier电力系统自动化2000.2PSPICESimulationResult380Vrmsinputand220Voutput5kW90kHzPF=0.993THD5%Three-phasemulti-resonantZVZCSPFCcircuitExperimentalresult100Vrmsinputand60Voutput360W56kHzthree-phaseflyback-derivedPFCcircuit00-00884291Experimentalresult42kHzthree-phasePFCBuck-Boostcircuitthree-phasePFCZetacircuitZVTsinglestagePFCcircuit97-00660230Experimentalresult208Vrmsinputand48Vdcoutput5kWOutputvoltageripple500mVpp40kHzIGBTEfficiency90%三、由开关器件组成可控整流桥的三相PFC电路3.1Basicboost-typerectifierZVTboostrectifier-1Experimentalresult50kHz180Vrmsinputand350Voutput97%at5kW10kWZVTboostrectifier-294-00349755Experimentalresult480Vrmsinputand800Voutput10kW30kHzIGBT97%efficiencyImprovedZVTboostrectifier-2Experimentalresult100kHz100Vrmsinputand120Voutput97%500WQuasi-resonantSepicPFCcircuitExperimentalResult35kHz415Vrmsinputand400Voutput1kW1200VIGBTExperimentalwaveform3.2Basicbuck-typerectifierFour-quadrantisolatedthree-phaseZVTrectifier92-00254720ExperimentalResult91kHz2kW208Vrmsinputand50Voutput400V25AMOSFETTHDabout0.9%ExperimentalwaveformQuasi-single-stageisolatedthree-phaseZVZCSbuckPWMrectifierZCSZVZCS96-00548619Experimentalresult33.3kHz305-407Vrmsinputand40-57Voutput6kWTHD5%四、三相功率因数校正电路的冗余设计Four-legthree-phasePFCcircuitwithfaulttolerantcapacityB.控制方法一、SPWM方式SPWM方式平均电流控制(averagecurrentcontrol)峰值电流控制(peakcurrentcontrol)滞环电流控制(hysteresiscurrentcontrol)间接电流控制(indirectcurrentcontrol)电荷控制(chargecontrol)单周期控制(one-cyclecontrol)空间矢量控制(spacevectorcontrol)hysteresiscurrentcontrol88-00009172indirectcurrentcontrol88-00009172Chargecontroldiagram00-00822600ChargecontrolOne-cyclecontroldiagram95-00474965One-cyclecontrolSpacevectorcontrol中国电机工程学报2000.6Spacevectorcontrol二、变频控制方式三、非线性控制方式非线性控制方式模糊控制(fuzzycontrol)神经网络控制(neuralnetworkcontrol)滑模变结构控制(slidemodecontrol)H∞控制(H∞control)Fuzzycontrol98-00701948neuralnetworkcontrol96-00548792Slidemodecontrol93-00471992H∞control
本文标题:功率因数校正技术..
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