功率因數(shù)校正技術(shù)

1、有源功率因數(shù)校正技術(shù)1單相有源功率因數(shù)校正2Why THD=95.6%,PF=0.63Why4How無源功率因數(shù)校正簡單、成本低、可靠性高、EMI??；尺寸重量大，校正效果與頻率、負(fù)載和輸入電壓變化有關(guān)。有源功率因數(shù)校正功率因數(shù)接近1，THD小，輸入電壓和頻率范圍很寬，體積、重量小，輸出電壓恒定；電路復(fù)雜，成本高，EMI高。5功率因數(shù)校正效果6無源功率因數(shù)校正逐流電路THD0.97有源功率因數(shù)校正電路任何一種DC-DC變換器都可以；常用boost/buck/buck-boost;按電感電流可分為連續(xù)、臨界和不連續(xù)模式按控制方式可分為電流峰值、滯環(huán)、平均電流；電壓型8三種不同模式的電流波形不連續(xù)

2、臨界 連續(xù)9三種電流型控制方式的電感電流波形峰值滯環(huán)連續(xù)10三種電流型控制方式比較11Boost功率因數(shù)校正原理_112Boost功率因數(shù)校正原理_213UC3854A/B平均電流、恒頻、連續(xù)模式14UC3854校正原理15臨界峰值電流模式16L6560/1/217L6562的應(yīng)用18不連續(xù)電壓型功率因數(shù)校正19Flyback電路20EMI濾波器21三相有源功率因數(shù)校正22A. 拓?fù)浣Y(jié)構(gòu)23一、三個(gè)單相PFC電路組成的三相PFC電路24Three-phase ZVT PFC rectifier consisting of single-phase boost converters25Exper

3、imental Result100kHz90V-130Vrms input and 380V output1.7kW26Three-phase ZVT PFC rectifier consisting of single-phase sepic converters2001-12_327Experimental Result100kHz200Vrms input and 28Vdc output500kWTHD5% full load28Three-phase PFC rectifier consisting of single-phase convertersAdvantage:1.dire

4、ctly use single-phase PFC techniques2.good performance in balanced conditionsDisadvantage:1.interaction between stages2.input current THD is around 10%3.low power stage29Two-single-stage three-phase PFC circuit30Experimental result120Hz ripple cancelled31Experimental waveform32二、基于不控整流橋的三相PFC電路332.1

5、 boost-type three-phase PFC circuits34Single-switch DCM ZCT boost rectifier94-0031632435Experimental Result50kHz IGBT170Vrms input and 600V output4kWTHD=10%95.2% 36Single-switch DCM ZVT boost rectifier94-0031632437Three-phase SVM boost rectifier38Matlab simulated waveform39Three-phase SVM boost rect

6、ifier-297-0061864740Simulation Waveform41Resonant boost three-phase PFC circuit99-0079919542Experimental result174kHz MOSFET220Vrms input and 340V output235W97% efficiencyTHD7.8%43Experimental waveform44three-phase Cuk PFC circuit45PSPICE Simulation Result120VL-L 60Hz input and 400V output25kHz2.9kW

7、THD 5% PF=0.9946three-phase Sepic PFC circuit47ZVT three-level boost circuit482.2 buck-type three-phase PFC circuits49Single-switch VF buck rectifier50PSPICE Simulation Result415V input and 400V output20kHz to 40kHz2.5kW95% estimated efficiency51Single-switch QR VF buck rectifier電力系統(tǒng)自動化2000.252PSPIC

8、E Simulation Result380Vrms input and 220V output5kW90kHzPF=0.993THD5%53Three-phase multi-resonant ZVZCS PFC circuit54Experimental result100Vrms input and 60V output360W56kHz55three-phase flyback-derived PFC circuit00-0088429156Experimental result42kHz57three-phase PFC Buck-Boost circuit58three-phase

9、 PFC Zeta circuit59ZVT single stage PFC circuit97-0066023060Experimental result208Vrms input and 48Vdc output5kWOutput voltage ripple 500mVpp40kHz IGBTEfficiency 97% efficiency67Improved ZVT boost rectifier-2 68Experimental result100kHz100Vrms input and 120V output97%500W69Quasi-resonant Sepic PFC c

10、ircuit70Experimental Result35kHz415Vrms input and 400V output1kW1200V IGBT71Experimental waveform723.2 Basic buck-type rectifier73 Four-quadrant isolated three-phase ZVT rectifier92-0025472074Experimental Result91kHz 2kW208Vrms input and 50V output400V 25A MOSFETTHD about 0.9%75Experimental waveform

11、76Quasi-single-stage isolated three-phase ZVZCS buck PWM rectifierZCSZVZCS96-0054861977Experimental result33.3kHz305-407Vrms input and 40-57V output6kWTHD5%78四、三相功率因數(shù)校正電路的冗余設(shè)計(jì)79Four-leg three-phase PFC circuit with fault tolerant capacity80B. 控制方法81一、SPWM方式82SPWM方式平均電流控制（average current control）峰值電流

12、控制（peak current control）滯環(huán)電流控制（hysteresis current control）間接電流控制（indirect current control）電荷控制（charge control）單周期控制（one-cycle control）空間矢量控制（space vector control）83hysteresis current control88-0000917284indirect current control88-0000917285Charge control diagram00-0082260086Charge control87One-cycle control diagram95-0047496588One-cycle control89Space vector control中國電機(jī)工程學(xué)報(bào)2000.690Space vector control91二、變頻控制方式92三、非線性控制方式93非線性控制方式