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毕业论文题目直流电机调速系统设计英文题目DCMotorSpeedControlSystem摘要I摘要本文主要是设计一个以单片机为主控芯片，通过按键改变直流电机的转速和转动方向，并能实时显示转速和脉冲数。本文首先初步确定了总体设计方案，根据设计的要求分模块进行设计。首先对设计用到的主要芯片如AT89C52单片机、霍尔元件、LCD1602液晶显示进行了参数和性能的介绍。根据所要达到的设计目的分模块进行了设计。在单片机模块主要设计了单片机最小系统。在驱动模块主要设计了H桥驱动电路。在测量模块运用霍尔元件对电机进行测速并输出信号给单片机中断端口。在显示模块采用LCD1602液晶显示，单片机通过输出电压信号给液晶实现实时显示。在按键模块由于按键数量比I/O口数量少，为了接线方便决定采用独立按键的连接方式。最后将各模块与单片机相连接，通过软件进行编程从而实现设计功能。关键词：直流电机；单片机；分模块ABSTRACTIIABSTRACTInthispaper,thedesignofamicrocontrollerbasedcontrolchip,throughthebuttontochangethemotorspeedandrotationdirection,andcandisplayreal-timespeedandthenumberofpulses.Inthispaper,theoveralldesignschemeispreliminarilydetermined,andthemodulesaredesignedaccordingtotherequirementsofthedesign.First,thedesignofthemainchipusedinsuchasAT89C52microcontroller,Holzercomponents,LCD1602liquidcrystaldisplayparametersandtheperformanceoftheintroduction.Accordingtothedesigngoaltoachievethedesignofmodulesweredesigned.Thesinglechipmicrocomputermoduleisdesigned.Inthedrivemodule,themaindesignoftheHbridgedrivercircuit.InthemeasurementmoduleusingHolzercomponentsofthemotorspeedandoutputsignaltothemicrocontrollerinterruptport.InthedisplaymoduleusingLCD1602liquidcrystaldisplay,microcontrollerthroughtheoutputvoltagesignaltotheliquidcrystaldisplayinrealtime.InthekeymodulebecausethenumberofkeysislessthanthenumberofI/Oport,inordertofacilitatetheconnectiontodeterminetheuseofindependentkeyconnectionmode.Intheend,eachmoduleisconnectedwiththesinglechipmicrocomputer,andthesoftwareisprogrammedtorealizethefunctionofthedesign.Keywords:continuouscurrentdynamo;singlechip;Submodule目录目录摘要...................................................................................................................................IABSTRACT..........................................................................................................................................II1.绪论....................................................................................................................................................11.1设计的背景.........................................................................................................................11.2直流电机的发展................................................................................................................11.3单片机以及微处理器控制系统的发展.......................................................................11.4本选题的理由及意义.......................................................................................................22.系统总体设计方案......................................................................................................................32.1本论文研究的主要内容...................................................................................................32.2直流调速系统设计任务分析..........................................................................................32.3系统设计目标.....................................................................................................................42.4直流电机调速.....................................................................................................................43.硬件电路的设计...........................................................................................................................63.1单片机电路设计................................................................................................................63.1.1STC89C52单片机介绍........................................................................................63.1.2单片机最小系统.....................................................................................................73.2.2.2晶振电路.......................................................................................................83.2.2.3复位电路.......................................................................................................93.2电源电路设计.....................................................................................................................93.2.1电源接口电路设计................................................................................................93.2.2直流稳压电源设计..............................................................................................103.3测速电路设计...................................................................................................................113.3.1霍尔传感器简介...................................................................................................113.3.2霍尔测速电路设计..............................................................................................113.4液晶显示电路设计..........................................................................................................123.4.1LCD1603液晶简介.............................................................................................123.4.2显示电路设计........................................................................................................133.5按键电路设计...................................................................................................................143.6PWM信号发生电路设计........................................