直流不间断电源的硬件设计(毕业设计)

（2012届）毕业设计题目：直流不间断电源的硬件设计学院：机电工程学院专业：电气工程及其自动化班级：电气081学号：200833495120姓名：陈永佳指导教师：熊远生教务处制2012年05月25日I诚信声明我声明，所呈交的论文是本人在老师指导下进行的研究工作及取得的研究成果。据我查证，除了文中特别加以标注和致谢的地方外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得＿＿＿＿＿＿或其他教育机构的学位或证书而使用过的材料。我承诺，论文中的所有内容均真实、可信。论文作者签名：签名日期：年月日II授权声明学校有权保留送论文交的原件，允许论文被查阅和借阅，学校可以公布论文的全部或部分内容，可以影印、缩印或其他复制手段保存论文，学校必须严格按照授权对论文进行处理，不得超越授权对论文进行任意处置。论文作者签名：签名日期：年月日III直流不间断电源的硬件设计摘要UPS是不间断电源的简称，是一种包含储能的装置，属于静止型恒压、恒频电力电子电源设备，具有保证电压频率稳定，改进电网质量，防止由于波形畸变、高频噪音以及瞬时停电给用户造成危害等功能。在线式UPS具有滤波、稳频、抗干扰、稳压等功能，被广泛应用于国民生产的各个部门，对计算机系统尤为重要。本设计为基于LPC1114芯片控制的在线式不间断电源，研究了UPS的充电过程，选择了M型蓄电池，设计了一个基于UC3906的充电电路。当市电正常时，由市电直接通过Buck-Boost稳压电路输出，同时向蓄电池充电；当断电时，由蓄电池供电通过Buck-Boost稳压电路输出。采用HD7279A对输出电压电流进行显示，利用电压检测和高边电流检测对输出电压电流值进行检测，以用于反馈调节。该电路不仅可以提供可靠高效的电源，还可以通过采集和计算输出数值，同基准电压相比较，避免过量充电，提高输出稳定性，实现了自动控制。关键词：UPS，不间断电源，蓄电池，充电电路，检测IVThehardwaredesignofDCuninterruptiblepowersupplyAbstractUPSisreferredtoasanuninterruptiblepowersupply,containenergystoragedeviceisastatictypeconstantvoltageandconstantfrequencypowerelectronicspowersupply,ensurethatvoltageandfrequencystability,improvepowerquality,preventwaveformdistortion,highfrequencynoiseandInstantaneouspowerfailurecausedtheharmtotheuserfunction.On-lineUPSwithfiltering,frequencystabilization,anti-interference,voltageregulators,andotherfunctions,iswidelyusedinvarioussectorsofthenationalproduct,isparticularlyimportantforcomputersystems.ThisdesignisbasedontheLPC1114chipcontrollineuninterruptiblepowersupply,StudytheUPSchargingprocess,selecttheM-typebattery,achargingcircuitbasedontheUC3906isdesigned.Whenthemainsisnormal,directlythroughtheBuck-Boostregulatorcircuitoutputatthesametimechargingthebattery;Whenpowereddown,poweredbythebatterythroughtheBuck-Boostregulatorcircuitoutput.HD7279Adisplaytheoutputvoltageandcurrent,voltagedetectionandhigh-sidecurrentsensingtodetecttheoutputvoltageandcurrentvaluestobeusedforfeedbackregulation.Thecircuitcannotonlyprovidereliableandefficientpowersupply,canalsocaptureandcalculatetheoutputvaluewiththereferencevoltageiscompared,avoidexcessivecharging,improvethestabilityofoutput,toachieveautomaticcontrol.Keywords:UPS,uninterruptiblepowersupply,battery,chargingcircuit,detectV目录摘要.....................................................................................................................IIIAbstract..................................................................................................................IV1绪论........................................................................................................................11.1引言..............................................................................................................11.2课题研究的主要内容...................................................................................11.3课题的意义...................................................................................................12UPS概述................................................................................................................32.1国内不间断电源市场的崛起........................................................................32.2早期的不间断电源市场...............................................................................32.3现代的不间断电源.......................................................................................32.4我国不间断电源发展现状............................................................................63方案设计与总体设计.............................................................................................73.1直流不间断电源的方案设计........................................................................73.2方案评价.......................................................................................................83.3数字式直流不间断电源的总体设计............................................................84主题硬件电路各个单元电路的设计....................................................................104.1充电电路的设计.........................................................................................104.1.1恒压式充电.......................................................................................104.1.2恒流式充电.......................................................................................114.1.3先恒流后恒压式充电........................................................................114.1.4充电电路方案说明............................................................................124.1.5基于UC3906的充电电路设计.........................................................124.2UPS蓄电池组的选择和使用.....................................................................144.2.1免维护蓄电池概述............................................................................154.2.2UPS蓄电池的设计...........................................................................164.2.3LPC1114L能源供给设计..................................................................174.3主电路设计.................................................................................................204.3.1Buck-Boost电路简介........................................................................204.3.2PWM控制技术简介.........................................................................214