《LED驱动电源设计与研究》.doc

毕 业 设 计（论文） 题 目：LED驱动电源设计与研究 摘 要 LED照明在日常的生产、生活中，因其具有节能、长寿、安全、环保、色彩丰富、体积小、耐闪烁、可靠性高、调控方便等诸多优点，正作为一种新型照明光源获得越来越广泛的应用。LED的应用，需要合适的驱动控制电路，本文研究工作是针对LED照明设计合适的驱动电源。 本论文首先介绍了LED照明的优点及应用现状，以及LED照明的广阔前景。其次介绍了LED发光的基本原理，测试分析了LED电压、电流和光功率之间的关系；比较了几种LED的光通量、价格等，选择了合适参数的LED作为发光元件。 通过分析比较常用的LED电源驱动方式，提出了以半桥式变换器为主电路结构形式。开关电源以其自身的优点已经成为电源行业的主流形式。开关电源技术的应用，使电源变得体积小，重量轻，效率高，性能更好。 关键词：LED照明;驱动电源;开关电源 ABSTRACT The LED lighting in daily production, life, due to its energy-saving, longevity, safe, environmental protection, colour is rich, small volume, flashing resistance, high reliability, regulation, convenient, and many other advantages, is as a new lighting source obtains more and more widely. LED application, need appropriate drive control circuit, this paper research work is aims at the LED lighting design suitable driving power. This paper firstly introduces the advantages of LED lighting and application status of LED lighting, and broad prospects. Secondly introduces the basic principle of LED, test analysis LED voltage, current and light power relationship; Compare several LED of the flux, and prices, select the appropriate parameters LED as light emitting components. Through the analysis and comparison of power driven approach used LED, put forward the half bridge type converter circuit structure form mainly. Switching power supply with his own advantage has become the main form in power supply industry. Switch power technology of application, make power becomes small volume, light weight, high efficiency, better performance. Key words: the LED lighting ;driving power supply;Switching power supply 目 录 第一章 绪论 2 1.1引言 2 1.2 LED基本特性介绍 2 1.3 LED的照明应用现状 4 1.4 LED驱动电路现状 5 1.5半导体灯应用存在问题 6 第二章 LED原理及驱动分析 7 2.1 LED发光原理 7 2.2半导体发光二极管的特点 8 2.3 LED的选择 9 2.4驱动方式 10 2.5 LED驱动器介绍 11 2.5.1直流驱动器 11 2.5.2交流驱动器 12 2.5.3 LED的直流驱动和脉冲驱动选择 13 第三章 主电路结构设计 14 3.1主电路结构介绍 14 3.1.1开关电源的应用与发展 14 3.1.2反激电路 15 3.1.3正激电路 16 3.1.4半桥电路 17 3.1.5全桥电路 18 3.1.6推挽电路 19 3.1.7几种电路结构的比较 20 3.2功率开关原件设计 22