| 反激式功率因数校正LED电源设计 |
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| 引用本文： | 王琪,高田.反激式功率因数校正LED电源设计[J].西安工业大学学报,2012(8):665-668,673. |
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| 作者姓名： | 王琪 高田 |
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| 作者单位： | [1]西安工业大学电子信息工程学院,西安710032 [2]西北工业大学电子信息学院,西安710072 |
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| 摘 要： | 为解决目前市场上的LED电源功率因数低、电流谐波大且工作效率低下、电源发热量大、易损坏的缺点,文中介绍了一种采用反激式拓扑的单级功率因数校正LED驱动电源.该电源在临界导通模式下实现了功率因数校正和对LED灯的恒流驱动,电路采用单级PFC结构简化了电路结构,采用零电压开关技术降低了开关管的开关损耗.文中对电路工作原理做了详细的说明,给出了临界导通模式下开关管导通时间、开关频率的计算公式以及影响功率因数的因素.实验结果表明,该电源功率因数大于0.96、效率大于0.9,可高效、可靠地驱动LED灯工作.
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| 关 键 词： | 反激式拓扑 LED驱动 功率因数校正 临界导通模式 |
Design of Flyback Power Factor Correction LED Power Supply |
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| Authors: | WANG Qi GAO Tian |
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| Affiliation: | 1. School of Electronic Information Engineering, Xi＇ an Technological University, Xi＇ an 710032, China 2. School o Electronic and Information, Northwestern Polytechnical University, Xi＇ an 710072, China) |
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| Abstract: | In order to solve the present LED power supply disadvantages, such as low power factor, large harmonic current, inefficient work, large power heat and destructibility, a LED power supply with flyback topology based on single-stage power factor correct （PFC） is presented in this paper. The power supply achieves power factor correction and constant-current driving LED in boundary conduction mode. Single-stage PFC is used to simplify circuit structure and zero-voltage-switched （ZVS） technology is used to decrease switch loss. The circuit principle is also described in detail. Meanwhile, the formulas for MOS swltch-on time and switching frequency are presented, and the main factor affecting power factor is proposed. The experiment results show that the power {actor is greater than 0. 96 and the efficiency is greater than 0. 9. The power supply drives the LED efficiently and reliablv. |
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| Keywords: | flyback topology LED driving power factor correction boundary conduction mode |
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