200W照明用LED驱动电源研究与设计

发布时间：2018-07-01 11:52

本文选题：LED驱动电源 + 有源功率因数校正　；参考：《青岛大学》2017年硕士论文

【摘要】：能源危机正成为世界各国所共同面临的头等难题,各国也正在竭尽全力的探索节约能源的途径,特别是一次能源。同时,环境污染也困扰着每一个国家,减少碳排放、保护大气环境成为各研究领域的关注焦点。在节能减排的大背景下,除了寻找新的能源形式之外,也需要从现有的能源消费结构上寻找节约能源的有效途径。电能消费是人类社会能源消费的一个重要途径,而照明用电又在世界电能总消费中占据重要位置,因此,有效提高照明能源使用效率对节能减排将起到巨大的作用。而LED照明具有低功耗、高效率、使用寿命长等特点,因此成为各国研究的焦点。驱动电源作为LED照明设备的核心,也是其安全、高效工作的前提。因此,在对LED驱动技术进行深入研究的基础上,本文对照明用200W LED驱动电源进行了研究与设计。首先,本文介绍了课题的背景,对LED驱动电源拓扑结构进行了详细分析;分析了功率因数校正技术,选择升压型有源功率因数校正电路(Boost PFC);对LLC谐振变换器的拓扑及其工作原理做了详细的分析,利用基波分量法(FHA)建立模型,并分析了电压增益等特性,为参数选择奠定了基础;在此基础上,确定了本方案采用Boost PFC+LLC谐振变换器的两级式主拓扑电路,其中前级功率因数校正电路采用L6562D芯片,后级谐振变换器部分采用L6599芯片,此外对整体方案中电路的相关参数进行设计,并对电路中主要元器件进行合理选型。根据设计方案,制作了一台200W LED驱动电源样机,在对样机关键点的测试之后,测试波形与理论分析一致,输出电压、电流稳定,根据测试数据计算后发现,功率因数大于0.98,整机效率大于93%,测试结果满足设计参数指标,验证了本方案的正确性与可行性。
[Abstract]:The energy crisis is becoming the most difficult problem that the countries all over the world face, and every country is trying its best to explore the ways to save energy, especially the primary energy. At the same time, environmental pollution also puzzles every country, reducing carbon emissions and protecting atmospheric environment become the focus of various research fields. Under the background of energy saving and emission reduction, in addition to finding new energy forms, we also need to find an effective way to save energy from the existing energy consumption structure. Electric energy consumption is an important way of energy consumption in human society, and lighting power consumption occupies an important position in the total power consumption in the world. Therefore, improving lighting energy efficiency will play a great role in energy saving and emission reduction. The LED lighting has the characteristics of low power consumption, high efficiency and long service life, so it has become the focus of research. As the core of LED lighting equipment, driving power supply is also the premise of its safe and efficient work. Therefore, based on the in-depth study of LED driving technology, this paper studies and designs the 200W LED driving power supply for lighting. First of all, this paper introduces the background of the subject, analyzes the topology of LED driving power supply in detail, and analyzes the power factor correction technology. The active power factor correction circuit (boost PFC) is selected, the topology and working principle of the LLC resonant converter are analyzed in detail, the fundamental component method (FHA) is used to build the model, and the characteristics of voltage gain are analyzed, which lays a foundation for parameter selection. On this basis, the two-stage main topology circuit of boost PFC LLC resonant converter is determined, in which the L6562D chip is used for the former stage power factor correction circuit, and the L6599 chip is used for the latter stage resonant converter. In addition, the related parameters of the whole circuit are designed, and the main components of the circuit are selected reasonably. According to the design scheme, a prototype of 200W LED driving power supply is made. After testing the key points of the prototype, the test waveform is consistent with the theoretical analysis, the output voltage and current are stable. The power factor is greater than 0.98 and the efficiency of the whole machine is more than 93.The test results meet the design parameters and verify the correctness and feasibility of the scheme.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM46

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