基于反激变换器的高功率因数LED驱动电源pdf,基于反激变换器的高功率因数LED驱动电源
电力自动化设备 第31卷 2=2000F。 4x、输出电压和流过IFD的电流im的关系波形 图4所示为交流220V输入时,输入线电压t,图(图中,1、23分别表示amcl、im的起始点),可 和输入电流i的相位关系波形图。从图4可以看出以看出流过LED的电流平均值稳定在350mA。图7 输入电流i的波形很好地跟踪了输入电压un的波为不同的输入电压时,实验样机的功率因数A和效 形,实现了功率因数校正 率η曲线。可以看出,在固定LED负载的条件下,随 着输入电压的升高,功率因数在逐渐变低,和理论分 析结果是一致的。通过实验可以看出,功率因数在 整个输入电压范围内都在096以上,达到了功率因 数校正的目的,并且整个电源效率高达8685%。 f- 400 ms/div 图4输入电压和输入电流波形图 Fig 4 Waveforms of input voltage and current 图5所示为在交流220V输入时,经过二极管 桥式整流后的输入电压usc、MOS管V的驱动电压 u。原边电流在采样电阻R3上产生的电压l和流 过副边二极管V的电流i波形图。其中图5(a)是 /: 4 ma/ div u在半个工频周期内瞬时值等于300V时的波形 图6输出电压0、LED电流和 图,图5(b是ux在半个工频周期内瞬时值等于 整流后输入电压l波形图 200V时的波形图当MOS管V导通瞬间由于其寄 Tig 6 Wavefmnis nf Ho, ijEp and lREC 生电容导致的电压毛刺。从图5a)和(b)可以看 出,每个周期当流过二极管V的电流降低为0时, 09 MOS管V的驱动电压变为高电平,囚此可以说明 系统工作在临界连续模式;并且图5(b)中MOs管V 94 1201602C0240280 的驱动信号m的频率明显高于图5(a)中的频率,这 与式(4)的分析结果也是一致的。 图7功率因数及其效率和输入电压的关系 图6所示为经过二极管桥式整流后的输入电压 Fig 7 Curve of input voltage vs, power factor and curve of input voltage vs, efficiency 4结论 本文分析了基于临界连续模式的反激变换器 LED驱动电源实现功率因数校正和恒流控制的工作 原理,并使用16562和TSM1052控制芯片研制了交 流85~264输入、负载为7只LED串联、LED电流 为350mA的样机.。样机实验结果说明流过IFD的 10 us/tli 平均申流被稳定在350mA,从而稳定了LED的亮度, (a)u,=300 电源在交流85-264V输入电压下功率因数都在 0.96以上,达到了功率因数校正的目的:井且整个LED 驱动电源的效率高达86.85% 参考文献: [1]沈霞,王洪诚,许瑈.基于 SEPIa变換器的高功率因数LED煦明 电源设计[J].电机与痉制学报,2010,14(1):4146. SHEN Xia, WANG Tongcheng. xU Jin. Design of lED lighting power supply with high power factor based on SEPIC converter [I. Elcetrie Machincs and Control. 2010, 14(1): 41-46. f:1o us/di [2 CHIL Huangjen, CHENG Shihjen. LED backlight thriving system (l)u=200V for large-geule LCD Panels[I]. IEEE Transactio:i on Industrial 图5不同输入电压下的tmc、lw、,和in波形图 Electronics,2007,54(5):2751-276 Fig5 Waveforms of IREC、、 ll anr ips at 13 BISOGNO F E, NITTA ARUMPHONG S, RADECKER M, et aL. A different input voltages line power-supply for LED Lighting using piezoelectric transformer 01994-2011ChinaAcademicJOurnalELectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net 第6期 沈霞等:基干反激变换器的高功率因数LED驱动电源设计 in class-E topologys[C- /CES/IEEE 5th Intemational Power Elee 因数改善措施研究「.电力自动化设备.28282):41-4 tronics and Motion Coat rol Conference. Shanghai, China: IEEE ZHAO Qinglin, W EN Yi, WANG Liang, et al. 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IEEE eurrent souree based on single flyback for driving high-porAer Transactions on Powcr Elcctronic4, 2001, 16(3): 360-368 LEDI. PowEr Electonic:, 2009, 43(7): 84-86 [7] CHOI W Y, KWON J M, DO H L H. et al. Single-stage half (编辑:汪仪珍 bridge converter with high power factor [I]. IEEE Transactions nn Electric: Prwer Applications, 2(M0.5. 152(3): 6.34-642 8 UAN-Z0-L A.LEE F C, BURGOS R Modeling analvsis and 作者简介 control design of single-slage voltage source PFC converter[C 沈霞(1981-),女,四川彭州人,讲师,硕士,研究方向 ustry Applieations Conference, EEE IAS. Hong kong, China:为电力电子与电力传动(E,m: xia shen@l63com) IEEE,2005:1684-1691 王洪诚{1955-),男,四川阃中人,教授,研究方向为控制 9M01BA5.c:1oA, OFOLIF,ta,. A high power理论与控制工程( E-mail: whe(swpu. edu. cn) /Applied Power Electron ies Conference and Exposition. IEEE 蒋林(1974-),男,四川宣汉人,讲师,博士,研兖方向 APEC, Nineteenth Annual. Anaheim. Us4.IEEE 2004: 149.152 为电力电子与电力传动(E-mail:ilin(@swpu.edu.cn); [10] HUBER L,JOVANOVIC MM. Single-slage, single-swilell impul 许僅:1980-),女,宁夏银川人.讲师,硕士,研究方向为 currenl-shlarping techn ique with reduced switching loss[J]. IEEE 电力电子与电力传动( E-mail: lemonjin'126com Tranaucticins on Power Electronica, 2000, 15(4): 681-687 方玮1975-),女,湖北武穴人,讲师,研究方问为电力 [1]赵清杯,文毅,三亮,等,双镜组反激式单级PC变换器及功率电子与电力传动(Emal:vil1006163com) Design of high-power-factor LED driver power supply based on flyback converter SHEN Xia, WANG Hongcheng, JIANG Lin, XU Jin, FANG Wei (Southwest Petroleum Universitv, Chengdu 610500, China) Abstract. To realize the pfc power factor correction and led current control of traditional led driver power supply, the flyback topology is applied where the isolation is needed. Circuit analysis proves that, the flyback cirtuil working in boundary conduction lode can realize PFC luncliOll. Single-stage llylrack-based PFC circuit is adopted in the improved Led driver power supply. Compared with two-stage PFC circuit,it has fewer components and lower power loss. Experimental results validate the correctness of theoretica Key words: electric power factor correction; LED driver power supply; flyhack converter; boundary conduction mode 01994-2011ChinaAcademicJOurnalELectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net