开关电源变换器毕业设计摘要本论文设计部分分为四部分:首先对开关变换器进行了概述,叙述了电力电子技术领域中功率变换器的进展,对开关电源和直流变换器进行了分类,概述了功率变换器的基本知识。其次论述了单端反激变换器的工作原理,分析了其三种工作状态最后总结了单端反激变换器的优缺点。接下来介绍了根据一定要求设计制作一台 200 W、有三路不同电压与功率输出的开关电源的设计过程,以与如何具体计算各个元计得参数。 最后简述了所设计电源的一些技术性能指标。关键词: 开关变换器, 开关电源, 输出性能,脉宽调制器,UC3842,反激式AbstractThis paper is divided into four parts of the designFirst of a switching converter overview describes the power of electronic power converter technology development, and direct current power converter to switch the classification of power converter outlined the basic knowledge.Then ends with a single anti-violent converter work theory, the analysis of its three working condition Finally summed up the advantages and disadvantages of single-anti-violent converter.Nextintroduced in the production of a certain design requirements Taiwan 200W, three different routes Voltage and power output switching power supply design process, and how a specific calculation of the various parameters of dollars.Best designed power outlined some of the technical performance indicators.KEY WORDS:Switching Power Supply,Pulse,Width Modulation,Flyback,Switching converter,Export performance,UC3842目 录1 概述 11.1 开关电源的分类 21.2 直流变换器的分类 21.3 基本功率变换器 31.4 对直流开关电源的要求 61.5 直流开关电源的进展 72 单端反激式开关电源原理 82.1 磁化电流临界状态 92.2 磁化电流不连续状态 102.3 磁化电流连续状态 113 开关电源的设计 143.1 设计要求 143.2 电路设计 163.2.1 脉宽调制器的选择 163.2.2 AC220V-DC28.5V 主电路的设计 194 电路输出性能测试 284.1 AC220V-DC28.5 一路输出性能 284.2 8V 2.5A 一路输出性能 294.3 24V/2A 一路输出性能 304.4 ...