12V6A开关电源设计

2013年度本科生毕业论文（设计）题目：12V/6A开关电源设计院－系：工学院专业：电气工程及其自动化年级：学生姓名：学号：导师及职称：2013年5月2013AnnualGraduationThesis(Project)oftheCollegeUndergraduateTitle：12V/6AaSwitchingpowersupplydesignDepartment:engineeringcollegeMajor:electricalengineeringandautomationGrade:2009Student’sName:StudentNo.:Tutor:may,2013摘要随着现代电力电子技术的发展，开关电源朝着小型化、智能化、大功率的方向发展。小型化要求开关电源体积小、重量轻，其主要依靠提高元器件的工作频率，特别是变压器的体积和重量决定了开关电源的体积和重量的大小，故高频变压器的研究设计是设计开关电源的一个重要环节。另外开关电源工作频率的提高，又会导致开关管开关损耗的问题，能量损耗将以热的形式表现出来，则开关电源的散热问题是设计过程中必须考虑的问题。为了解决这一系列的问题，目前国内外大多采用软开关技术，采用该技术能够大大地减小了开关损耗和体积、重量，从而提高了开关电源的效率。针对开关电源的发展趋势，本文将竭尽所能做一个可靠性高、小型化、稳定性好、高效率的开关电源，主要从是以下这些方面进行论述、设计：首先，主要概述了开关电源的研究背景及意义；开关电源的相关概述和性能要求。其次通过对开关电源的整体方案的分析与选择得出了最后的方案。然后对变换器的结构和原理分析来做开关电源的主电路的设计，最后介绍辅助电源电路及其它电路的设计，包括输入、输出滤波电路，整流电路的选取及其设计，控制电路以及保护等。对开关电源设计的基本工作做完后，使用MATLAB对其部分器件进行仿真。关键词：开关电源、PWM、UC3842、仿真AbstractWiththedevelopmentofmodernpowerelectronictechnology.Switchingpowersupplydevelopmentinthedirectionoftheminiaturization.Intelligent.highpower.smallvolume.Lightweightminiaturizationrequirement.Relymainlyonimprovingtheworkfrequencyofthecomponents.Inparticular.Thevolumeandweightofthesizeoftheswitchpowersupply.Thereforeresearchofhigh-frequencytransformerdesignisanimportantlinkindesignofswitchpowersupply.Atthesametimeswitchpowerworkingfrequencyincreased.Andbringstheproblemofswitchingtubeswitchloss.Energylosswillbedisplayedintheformofheat.Theheatdissipationproblemofswitchpowersupplyisaproblemmustbeconsideredinthedesignprocess.Seekingtosolvetheproblemmustoflargeworkhighfrequencyswitchingloss.Softswitchtechnologycommonlyusedathomeandabroad.Usingthistechnologyreallygreatlyreduceswitchlossandvolume,weight,improvetheefficiencyofswitchingpowersupply.Inviewofthedevelopmenttrendofswitchpowersupply.Thisthesismainlydiscussesfromtheseaspects,thedesign:firstofall,themainoutlinestheresearchbackgroundandsignificanceofswitchingpowersupply:switchingpowersupplyrelatedoverviewandperformancerequirements.Forswitchingpowersupplydesignofthebasicworkdone.usingMATLABsimulationonsomeofitscomponents.Keywords:switchingpowersupply.PwmUC3842.Simulink.红河学院本科毕业论文(设计)目录第一章绪论.....................................................................................................................................11.1开关电源的发展史.............................................................................................................11.2开题研究背景及意义.........................................................................................................21.3开关电源的概述和性能要求.............................................................................................31.3.1开关电源的优点.....................................................................................................31.3.2开关电源的工作方式..............................................................................................41.4开关电源的性能要求.........................................................................................................41.5本论文的任务、设计目标................................................................................................51.6本论文的主要工作.............................................................................................................6第二章开关电源的整体方案分析与选择.....................................................................................72.1单端自激式开关稳压电源电路具有以下特点：............................................................82.2单端他激式开关稳压电源电路具有以下特点：.............................................................82.3主电路的功率模块.............................................................................................................82.4控制电路的选择.................................................................................................................92.5开关电源各主要组成部分的最终选择方案...................................................................10第三章绝缘栅双极晶体管...........................................................................................................113.1IGBT管的工作原理及特性............................................................................................113.2变换器的主要参数的选择：..........................................................................................133.3电路的特点及设计考虑...................................................................................................143.4变换器损耗分析...............................................................................................................16第四章电源主电路的设计...........................................................................................................184、1电源的设计要求............................................................................................................184、2开关电源的基本工作原理............................................................................................184.2.1开关电源的组成部分...........................................................................................184.2.2开关电源的工作过程.........................................................................................184.2.3脉宽调制器的基本原理.....................................................................................194.3开关电源各主要组成部分........