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机电综合应用题目：基于单片机的直流可调电源的设计系部名称：信息****专业班级：电气083班学生姓名：**学号：200880884327指导教师：***教师职称：讲师2011年12月26日******************大学I摘要随着电子技术的迅速发展，直流电源应用非常广泛，其好坏直接影响着电气设备或控制系统的工作性能，目前，市场上各直流电源的基本环节大致相同，主要都包括交流电源、交流变压器(有时可以不用)、整流电路、滤波稳压电路等。因此对稳压直流电源的工作原理的理解非常必要。本文运用了将单片机控制系统应用于开关稳压电源的方法和原理，提出的开关电源可调稳压输出的观点。认为可以实现开关电源的数控调节，并通过分析稳压工作原理、电压调节方法、AD芯片和单片机的工作原理，使输出电压下实现了0．1~15V步进调节。最终得出了直流开关电源在单片机的控制下能够输出稳定的、可调的直流电压的结论。该可调稳压电源不仅具有开关电源体积小，损耗低的优点，还具有线性电源输出电压纹波小，输出特性好的优点。并且引入单片机控制，使其在功能上具有一定智能化，能够满足一般低限度场合的供电需要。具有一定的的研究意义及实用价值。关键字：稳压电源，单片机，AD芯片******************大学IIAdjustableDCRegulatedSwitchingPowerSupplyBaseOnSingle-chipMicrocomputerAbstractWiththerapiddevelopmentofelectronictechnology,theDCpowersupplyiswidelyused,itsqualitydirectlyaffectstheelectricaldeviceorcontroltheworkingperformanceofthesystem,atpresent,themarketofthedirectcurrentpowersupplythebasiclinkofroughlythesame,mainlyincludestheACpower,theACtransformer(sometimescannot),arectificationcircuit,afilteringvoltagestabilizingcircuit.SotheregulatedDCpowersupply,theworkingprincipleoftheunderstandingisnecessary.Thispaperdiscussestheapplicationofthesinglechipmicrocomputercontrolsystemappliedinswitchingpowersupplymethodandprinciple,putforwardswitchingpowersupplyadjustablevoltageregulatoroutputpointofview.Thatcanrealizeswitchingpowersupplycontrolregulation,andthroughtheanalysisoftheworkingprincipleofvoltage,voltageregulationmethod,A/Dchipandtheprinciple,sothattheoutputvoltagetoachieve0.1~15Vstepregulator.FinallydrawtheconclusionthattheDCswitchingpowersupplyunderthecontrolofsingle-chipmicrocomputercanoutputstable,adjustableDCvoltagetotheconclusion.Theadjustableregulatedpowersupplynotonlyhastheswitchingpowersupplyhastheadvantagesofsmallvolume,lowloss,alsohastheadvantagesofsmalloutputripplevoltageoflinearpowersupply,outputcharacteristicsofgoodadvantages.AndtheintroductionofSCMcontrol,itsfunctionhascertainintelligence,cansatisfythegenerallowlimitthepowerneedsofoccasions.Hascertainresearchvalueandpracticalsignificance.Keywords:RegulatedPowerSupplySCMADChip目录******************大学III1引言..................................................................................................................................................12设计任务及要求............................................................................................................................22.1设计目的..............................................................................................................................22.2设计内容..............................................................................................................................23电源系统硬件介绍........................................................................................................................33.1电源的介绍.........................................................................................................................33.2AT89S52单片机................................................................................................................43.2.1AT89S52的功能介绍..........................................................................................43.2.2AT89S52的个引脚功能.....................................................................................43.3数码管显示.........................................................................................................................73.3.1数码管结构及原理................................................................................................73.3.2数码管显示方式.....................................................................................................93.4TLC1543AD转换芯片...................................................................................................103.4.1TLC1543芯片的工作时序.................................................................................113.4.2TLC1543的软硬设计要点...............................................................................123.4.3TLC1543芯片的应用.........................................................................................134电源设计方案论证......................................................................................................................144.1设计方案分析...................................................................................................................144.2方案选择............................................................................................................................155电源硬件电路设计......................................................................................................................165.1Protel99SE软件...............................................................................................................165.2电源原理图设计...............................................................................................................165.2.1电路原理图设计...................................................................................................165.2.2电路软件设计.......................................................................................................215.3电路板的焊接及调试...........................