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1、 毕业设计（论文）笔记本电脑电源适配器的设计与制作专业（系） 电气工程系电气自动化 班 级 工业控制103 班 学生姓名 指导老师 完成日期 f摘要毕业设计是培养学生综合运用所学的基础理论、基本知识和基本技能，分析和解决实际问题的能力。它具有很强实践性和综合性，是培养学生独立工作的一种良好途径和方法。在设计过程中，我重温和巩固了以前所学的基础理论和专业技术知识，弥补了自身在这些方面的欠缺，同时更深刻地体会到作未自动化控制工作者无论实在设计还是在维修检测中都要保持清醒的头脑严谨的思路以安全正确的方法去操作以科学严谨的态度将理论与实践切实联系起来。在设计中，我翻阅了大量的参考资料，努力使所学的知识
2、不断地系统化，不断地融会贯通。随着开关电源在计算机、仪器通信、航空航天、仪器仪表及家用电器等方面的广泛应用，人们对其需求日益增长，并且对电源的效率、体积、重量及可靠性等方面提出了更高的要求。开关电源以其效率高、体积小、重量轻等优势在很多方面逐渐取代了效率低、又笨重的线性电源。电力电子技术的发展，特别是大功率器件IGBT和MOSFET的迅速发展，将开关电源的工作频率提高到相当高的水平，使其具有高稳定性和高性价比等特性。开关电源技术的主要用途之一是为信息产业服务。信息技术的发展对电源技术又提出了更高的要求，从而促进了开关电源技术的发展。开关电源的高频变换电路形式很多，常用的变换电路有推挽、全桥、半
3、桥、单端正激和单端反激等形式。本论文是基于芯片UC3842的小功率高频开关电源系统设计论文共分七章进行阐述，并配有多幅插图，力求更具说服力。限于本人水平和资料不足，设计中肯定存在诸多不足，敬请老师和同学多多批评指正！ 在设计过程中，得到了陈勇宏老师等其他老师的悉心指导，谨此表示感谢！关键词：开关电源 半桥 全桥 推挽 高频变压器AbstractThe graduation project is to develop the the students integrated use of the basic theory, basic knowledge and basic skills, and
4、 the ability to solve practical problems. It has a strong practical and comprehensive, and is a good way to train students to work independently and methods. In the design process, I revisit and consolidate previously learned basic theory and technical expertise, to make up for their own lack in the
5、se areas, while a better insight to make the detection of automation and control workers regardless it design or maintenance must keep sober-minded rigorous ideas to rigorous scientific approach to the theory and practice of effectively linking the safe and correct way to operate. In design, I have
6、read a lot of reference materials, efforts continue to systematic knowledge learned, constantlyPlaces in context.With the switch power source extensive use in the field of computer, communicate by letter, aeronautics and astronautics instrument appearance and domestic appliances etc, people increase
7、s by gradually to whose need amounts, have brought forward higher request to aspect such as power source efficiency, bulk factor and reliability .The switch power source is small with its efficiency height volume, weight makes light of to wait for advantage to have substituted the inefficient, both
8、stupid and serious linearity power source in many aspects step by step .The electric power electronic technology development, specially high efficiency component IGBT and the MOSFET rapid development ,enhances the switching power supply operating frequency to the quite high level ,enable it to have
9、the high stability and GaoXingjia compares and so on the characteristic. One of switching power supply technology main uses is serves for the information industries. The information technology development also set a higher request to the power source technology, thus promoted the switching power sup
10、ply technology development. Switch power source high frequency alternation circuit form many, forms such as alternation circuit in common use having the push-pull, entire bridge, the bridge, only upright exciting and single end exciting partly on the contrary. This paper is based on UC3842 chip of l
11、ow power frequency switching power supply system designKey word: Switch powerhalf-bridgebridgehigh push-pullfrequency transformer目录 第一章 绪论61.1 前言61.1.1 国内外电源发展技术状况61.2 选题背景71.3 本课题要求及主要研究内容8 1.4 主要技术指标8第二章 方案论证与设计92.1 设计参数指标9 2.1.1 整流电路的选择与论证9 2.1.2 滤波电路的选择与论证11 2.1.3 课题方案设计的确定11第三章 开关电源的简介123.1 开关电
12、源概述123.2 开关电源的工作原理133.3 开关电源的组成143.4 开关电源的特点14第四章 主要元器件的介绍164.1 uc384216 4.1.1 简介：16 4.1.2 结构介绍17 4.1.3 UC3842各结构的作用及原理介绍：19 4.1.4 技术参数214.2 高频变压器23 4.2.1 简介234.2.2 工作原理234.2.3 高频变压器参数设计234.3 光耦PC817264.4 电力二极管274.5 电力场效应晶体管MOSFET274.6 滤波电容284.7 启动电阻294.8 输出滤波电容294.9 反激式转换器开关晶体管30第五章 电路原理及组成315.1 电源
13、设计指标315.2 总体电路框图315.2.1 输入滤波电路(电源噪声滤波器)325.2.2 整流滤波电路325.2.4 振荡电路335.2.5 开关管过流保护电路335.2.6 振荡器与时钟电路345.2.7 短路保护电路35第六章 电路调试376.1 测量仪器376.2 注意事项376.2.2 测量电压所用仪器的输入阻抗必须远大于被测处的等效阻抗376.2.3 测量仪器的带宽必须大于被测电路的带宽376.2.4 要正确选择测量点376.2.5 测量方法要方便可行386.3 调试步骤386.3.1 电观察：386.3.2 静态调试：386.3.3 动态调试：386.4 调试结果38第七章 总结与心得体会39总结39心得体
