高功率因数准谐振LED驱动电源设计

发布时间：2018-07-10 07:51

本文选题：LED驱动电源 + 功率因数校正　；参考：《华南理工大学》2014年硕士论文

【摘要】：为了应对全球气候变暖和能源危机问题，世界各国都非常重视节能环保产品的开发。照明是消耗电力资源的主要方式，使用节能环保的LED灯具，替代传统照明，是大势所趋。LED驱动电源的质量对LED灯具至关重要。为响应国家绿色照明政策，推动LED照明的市场普及，对LED驱动电源特点和关键技术的研究，具有一定的现实意义。开关电源体积小、重量轻，被广泛应用于LED驱动电源。本文针对大功率LED照明的特点，研究了开关电源比较热门的两项技术：有源功率因数校正技术和软开关技术，通过对比分析，找到了适合LED驱动电源的两级功率因数校正设计方案。对比了常用功率因数校正方案和控制方法的特点，选择BCM峰值电流控制有源功率因数校正电路作为前级电路。研究了BCM峰值电流控制有源功率因数校正电路电感的设计方法，结合TDA4863芯片设计了控制电路和反馈网络。分析常用隔离式拓扑结构特点，选择反激式变换器设计后级电路，研究了反激电路准谐振的实现过程和工作原理，选择OB2203芯片设计了后级准谐振反激电路。对恒流恒压和EMI滤波电路进行了研究和设计。最后制作了一款高功率因数、高效率100瓦LED驱动电源，并实现了有源功率因数校正级电路的变电压输出和整机输出电流的可调，，提高了低输入电压时驱动电源的整体效率和灯具的匹配能力。对相关波形、功率因数和效率进行了测试，测试结果比较理想，达到了预期的指标。
[Abstract]:In order to deal with the global climate change and energy crisis, countries all over the world attach great importance to the development of energy conservation and environmental protection products. Lighting is the main way to consume power resources. It is very important to use energy saving and environmental protection LED lamps instead of traditional lighting. The quality of LED driving power supply is very important to LED lamps. In order to respond to the national green lighting policy and promote the popularity of LED lighting market, it is of practical significance to study the characteristics and key technologies of LED driving power supply. Switching power supply is widely used in LED drive power because of its small size and light weight. According to the characteristics of high power LED lighting, two popular switching power supply technologies, active power factor correction (APFC) and soft switching, are studied in this paper. A two-stage power factor correction design scheme suitable for LED driving power supply is found. The characteristics of common power factor correction schemes and control methods are compared. The BCM peak current control active power factor correction circuit is selected as the leading circuit. The design method of active power factor correction (PFC) circuit inductance for BCM peak-current control is studied. The control circuit and feedback network are designed with TDA4863 chip. This paper analyzes the characteristics of isolation topology in common use, chooses the flyback converter to design the backstage circuit, studies the realization process and working principle of the flyback circuit quasi resonance, and chooses OB2203 chip to design the backstage quasi resonant flyback circuit. The constant current constant voltage and EMI filter circuit are studied and designed. Finally, a high power factor, high efficiency 100 watt LED drive power supply is made, and the variable voltage output of the active power factor correction stage circuit and the adjustable output current of the whole machine are realized. The overall efficiency of driving power supply and matching ability of lamps and lanterns are improved under low input voltage. The correlation waveform, power factor and efficiency are tested. The test results are satisfactory and reach the expected target.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46;TM923.34

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