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毕业论文（设计）材料题目：异步电动机变频调速控制系统设计学生姓名：xxx学生学号：xxxxxxxxx系别：电气信息工程学院专业：自动化届别：2012届指导教师：xxx异步电动机变频调速控制系统设计学生：xxx第1页指导教师：xxx摘要：本文对变频调速理论、逆变技术、SPWM产生原理进行了研究，在此基础上设计了一种新型数字化三相SPWM变频调速系统，以8051控制专用集成芯片SA4828为控制核心，采用IGBT作为主功率器件，同时采用EXB840构成IGBT的驱动电路，整流电路采用二极管，可使功率因数接近1，并且只用一级可控的功率环节，电路结构比较简单。本文在控制上采用恒fV控制，同时，软件程序使得参数的输入和变频器运行方式的改变极为方便，新型集成元件的采用也使得它的开发周期短。此外，本文对SA4828三相SPWM波发生器的使用和编程进行了详细介绍，完成了整个系统控制部分的软硬件设计。关键字：变频调速；正弦脉宽调制；fV控制；SA4828波形发生器Inductionmotorspeed-adjustedsystemdesignThestudent：xxxTheteacher：xxxxxxElectronicinformationandengineeringinstitutefromHuainanNormalUniversityAbstract:Thisthesishasaresearchonthesetechnologies:VariableVoltageVariableFrequencymotordrive,inverter,andthecreationprincipleofSPWM,Basedontheresultsofthestudy,IdesignedasystemofanewdigitalthreephasesVVVFmotordrivesystem.ItusesASIC-SA4828controlledby8051asmaincontrollingcore,itusesIGBTaspowerdevice,andusesEXB840asdrive.Itusesdiodesasconvertingcircuitunit,whichmakespowerfactorcloseto1.BecauseIonlyneedtocontrolinverter,thewholecircuitisverysimple.IadoptthemeansoflinearfVoperation.Atthesametime,itisveryconvenienttoinputparametersorchangethedrive’soperatingmodeduetothesoftwareprocedure.Moreover,owingtotheadvantagesofthenewintegratedparts,itcostslesstimetodevelopthismotordrive.ThisthesishasalsodetailintroducedthemethodoftheusageandtheprogramsofthethreephasesSPWMwavegeneratorSA4828.Thesoftwareandthehardwareofthecontrolpartinsystemhavebeencompleted.Keywords:variablefrequencyspeedcontrol；SinePulseWidthModulation(SPWM)；fVoperation；SA4828WaveGenerator异步电动机变频调速控制系统设计第2页目录第一章绪论.....................................................................................................................................31课题的研究现状和意义.......................................................................................................32变频器的动态发展趋势.......................................................................................................5第二章方案设计.............................................................................................................................62.1变频器的主电路方案.......................................................................................................62.2系统的原理框图...............................................................................................................72.3电动机原始参数...............................................................................................................82.4异步电机的工作原理.......................................................................................................82.4.1异步电机的等效电路....................................................................................................82.4.2异步电机的转矩..........................................................................................................102.4.3异步电机的机械特性..................................................................................................102.4.4异步电机变频调速原理..............................................................................................112.5变频调速的控制方式.....................................................................................................122.5.1fV比恒定控制..........................................................................................................12第三章变频器主电路...................................................................................................................173.1主电路的工作原理..........................................................................................................173.2主电路各部分设计..........................................................................................................183.2.1交直电路设计...............................................................................................................183.2.2直交电路设计..............................................................................................................193.2.3主电路工作原理...........................................................................................................203.2.4主电路参数计算..........................................................................................................223.3IGBT及驱动模块介绍....................................................................................................233.3.1IGBT简介及驱动.........................................................................................................233.3.2EXB840的内部结构.....................................................................................................233.3.2IGBT驱7动电u.......................................................u路24第四章控制回路.........................................................................................................................25第3页4.1驱动电路.........................................................................................................................254.1.1SPWM调制技术.............................................................................................................254.1.2SPWM波生成芯片特点和引脚.....................................................................................274.1.3S