DAC0832数模转换的数控电源

题目：基于DAC0832数模转换的数控电源专业：电子信息工程班级：姓名：学号：指导教师：职称：讲师完成日期：2014年2月25日摘要I摘要目前，电源正在朝着智能化、模块化、高频化、绿色化、小型化等方向发展。以单片机为核心设计制造出的新一代智能型电源不但电路简单结构紧凑，而且由于单片机具有强大的计算和控制能力，可减少干扰信号及模拟电路引起的误差，大大提高电源输出电压和输出电流的精度。智能电源可利用单片机设置周密的保护监测系统，确保电源运行可靠，输出电压和电流采用数字显示，设定值由键盘输入，交互性好，操作方便，克服了输出电压单一的缺点。它是以ATM89C51单片机为控制核心的开关电源，具有输出电压可调，电压数字显示，输出电流限流的功能。本文具体阐述了开关电源的基本原理及工作过程。降压同步整流器的原理及控制，电源各硬件模块的设计及软件设计。该电源硬件模块包括滤波模块、单片机供电电源模块、开关模块及显示模块。关键词：89C51；直流电压输出；直流电压输入AbstractIIAbstractAtpresentswitchingpowersuppliesaremovingintheintelligentmodularhigh-frequencygreenminiaturizationandotherdirection.MCUcoredesignedtoproduceanewgenerationofintelligentswitchingpowersupplycircuitisnotonlysimplecompactstructureandbecausesinglechipapowerfulcomputingandcontrolcanreducetheinterferencesignalandanalogcircuitscausedtheerrorgreatlyincreasedtheoutputvoltageandswitchingpowersupplycurrentaccuracy.SmartPowerMCUcanbeusedtosettheprotectionofwell-monitoringsystemtoensurereliablepowersupplyoutputvoltageandcurrentdigitaldisplaysetthevaluefromkeyboardinputinteractiveeasytooperatetoovercometheshortcomingsoftheoutputvoltageofasinglewithmorehighpracticalvalue.ItisATM89C51MCUtocontrolthecoreswitchingpowersupplywithadjustableoutputvoltage,voltagedigitaldisplayoutputcurrentlimitingfunction.Enunciatedthebasicprincipleofswitchingpowersupplyandtheworkingprocesstheprincipleofstep-downsynchronousrectifierandcontrolpowersupplydesignofTcKeyword:89C51DCvoltageoutputDCvoltageinput目录III目录1.绪论.........................................................................................................................................-1-1.1课题研究意义...............................................................................................................-1-1.2数控稳压电源的发展及适用性...................................................................................-1-1.3论文主要内容及安排...................................................................................................-2-2.数控电源设计方案..................................................................................................................-3-2.1系统总体框架...............................................................................................................-3-2.2各模块的方案论证.......................................................................................................-3-2.2.1按键控制模块.....................................................................................................-3-2.2.2显示模块.............................................................................................................-4-2.2.3单片机模块.........................................................................................................-4-2.2.4D/A数字模拟转换模块.....................................................................................-6-2.2.5模拟信号处理模块.............................................................................................-8-3.数控电源的软硬件设计........................................................................................................-11-3.1按键电路.....................................................................................................................-11-3.1.1按键电路硬件设计...........................................................................................-11-3.1.2按键电路软件设计...........................................................................................-11-3.2显示电路.....................................................................................................................-12-3.2.1显示电路硬件设计...........................................................................................-12-3.2.2显示电路软件设计...........................................................................................-13-3.3单片机外围电路.........................................................................................................-13-3.4数模转换电路设计.....................................................................................................-14-3.5运放电路设计.............................................................................................................-15-3.6稳压电路设计.............................................................................................................-15-4.系统调试...............................................................................................................................-16-4.1硬件调试方法.............................................................................................................-16-4.2软件调试方法.............................................................................................................-16-5.总结与展望...........................................................................................................................-17-致谢...........................................................................................................................................-18-参考文献...................................................................................................................................-19-附录Ⅰ元器件清单..........................................................