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| Design and Analysis of a Single-Stage Bridgeless Boost-Buck Converter |
| Zheng Qingliang, Zhang Qiang, Lin Weiming |
| Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116 |
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Abstract Two-stage circuit is widely used in the high-power LED driver supply. However, the cost increases for requiring more components and two sets of control, and the full-bridge diode rectifier also reduces the converter efficiency due to the large conduction losses. This paper presents a novel single-stage (SS) bridgeless Boost-Buck circuit. Boost circuit serves as a PFC stage and Buck as a DC/DC stage. Bridgeless structure can reduce conduction losses effectively, the proposed DCM+CCM control strategy is used to simplify the control. At last, a prototype with 85~135Vrms input and 2A/150W output was set up to verify the theoretical analysis．The power efficiency>90%, high power factor≥0.985 and THD<17% were achieved at rated output power. The experimental results show that the proposed topology has better performance than two-stage Boost+Buck in low-input voltage & high-input current occasion.
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Received: 20 April 2015
Published: 23 March 2015
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| Cite this article: |
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Zheng Qingliang,Zhang Qiang,Lin Weiming. Design and Analysis of a Single-Stage Bridgeless Boost-Buck Converter[J]. Electrical Engineering, 2015, 16(03): 15-17.
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http://dqjs.cesmedia.cn/EN/Y2015/V16/I03/15
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[1] Huber L Yungtaek, Jang Jovanovic M M. Performance Evaluation of Bridgeless PFC Boost Rectifiers[J]. IEEE Trans. on Power Electronics, 2008, 23 (3): 1381-1390.
[2] 李镇福, 林维明. 一种改进的无桥Boost功率因数校正电路[J]. 电力电子技术, 2012, 46(2): 96-98.
[3] 林维明, 汪晶慧, 邹剑华, 等. 新型宽输出电压PFC电路的设计分析[J]. 电力电子技术, 2008, 42(7): 29-30.
[4] YAO K, RUAN X B, MAO X J, et al. DCM Boost PFC Converter with High Input PF[C] // APEC. Palm Springs, CA, 2010: 1405-1412.
[5] 林维明, 洪翠, 黄超, 等. 无桥PFC电路改进单周期控制的仿真与实验分析[J]. 电工电能新技术, 2013, 32(2): 20-23. |
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2015, Vol. 16 
