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目录摘要.............................................................................................................................IABSTRACT...............................................................................................................II绪论............................................................................................................................11交流调速技术发展概况..........................................................................................21.1电力电子器件..............................................................................................21.2变流技术......................................................................................................31.3变频调速的控制方式...................................................................................31.4MATLAB/Simulink仿真介绍.........................................................................42逆变电路的建模与仿真..........................................................................................52.1绝缘栅双极型晶体管....................................................................................52.2逆变电路的设计.............................................................错误!未定义书签。2.2.1三相桥式逆变电路的基本原理..........................................................62.2.2正弦脉冲宽度调制（SPWM）基本原理...............................................62.2.3三相SPWM逆变器的建模与仿真........................................................73变频器的设计仿真................................................................................................103.1变频器的基本概念.....................................................................................103.2交-直-交变频电路的建模与仿真...............................................................114矢量控制调速系统建模与仿真.............................................................................144.1建立异步电机模型....................................................................................144.1.1坐标变换.........................................................................................144.1.2建立dq坐标系下电机模型.............................................................154.2异步电动机按转子磁链定向的矢量控制..................................................174.2.1按转子磁链定向的同步旋转正交坐标系状态方程..........................174.2.2异步电动机模型仿真验证...............................................................194.2.3按转子磁链定向矢量控制的基本思想和特点................................204.3按转子磁链定向矢量控制的方式..............................................................224.3.1电路闭环控制方式..........................................................................224.3.2转矩控制方式..................................................................................224.4矢量控制调速系统仿真.............................................................................234.4.1仿真调试与参数设定......................................................................244.4.2仿真结果与分析..............................................................................25致谢..........................................................................................................................28参考文献......................................................................................错误!未定义书签。I摘要异步电动机采用变频调速技术，具有调速范围广，调速时因转差功率不变而无附加能量损失的优点，因此，变频调速是一种性能优良的高效调速方式。本文以MATLAB为仿真工具，介绍了Simulink中的仿真模块，研究了交流电机变频调速系统，分析了变频器的构成和工作原理，并据此对逆变电路进行了仿真设计。首先对调速系统仿真所需要的各种电力系统模块做了简要的介绍，说明了逆变器的工作原理，在此基础上用MATLAB/Simulink软件分别对各种电路模块进行了仿真设计，进而设计出了实际中广泛应用的交-直-交变频器的仿真模型，实现了对交流电机变频调速系统的仿真研究，在此基础上建立电机模型，进行矢量控制设计，以带转矩内环的转速、磁链闭环矢量控制的方法对异步电动机变频调速系统进行建模和仿真，并对仿真结果进行了分析,由仿真结果可以看出系统转速的动态响应快，稳态跟踪精度高，表明此建模方法是可行和有效的。关键词：MATLAB/Simulink变频调速逆变器仿真IIABSTRACTWiththeapplicationoffrequencyandspeedconversiontechnologytosynchronousmotor,itsspeedcanbewide-rangedadjusted.Whenitcomestoadjustingspeed,becauseofslippowerunchanged,thereisnoadditionalenergylost.Thusitmakesthistechnologyahigh-equalityandefficientwaytoexchangethespeed.Thisthesis,aimingatMATLABassimulationtool,introducesSimulinksimulationmoduleandtheACmotorspeedcontrolsystemasthesubjectoftheresearchandanalyzesthestructureoftheinverterandhowitworks.Onthisbasis,avarietyofinvertercircuitsimulationdesignsareconducted.Firstofall,thisthesismakesabriefintroductionaboutpowersystemmodulepowerwhichneedspowerelectronicsimulation,theworkingprincipleoftheinverterincluded.Basedonthetheoryabove,thenMATLAB/Simulinksoftwareareusedinthesimulationdesignsaboutdifferentkindsofcircuitmodules.Moreoverthedesignsofthesimulationmodelofwidely-usedcross-DC-ACinverterareconductedtoachievethegoalofthesimulationstudyofACmotorspeedcontrolsystem,carriesthemodellingandthesimulationonasynchronousmotoradjusting-speedsystembasedonvectorcontrolwithtorqueinnerrimandfluxlinkageofclosedloop，givesoutthesimulationandmakesanalysetoit．Thesimulationresultofthemodelshowsthespeedofdynamicresponseandtheaccuracyofsteady-statetracking，alsoconfirmesthatthemodellingisfeasibleandeffective．Keywords：MATLAB/SimulinkFrequencyControlInverterSimulation1绪论随着社会的发展，能源需求快速增长，如何有效地节能也成为了一个亟待解决的问题。变频调速技术除了可以改善生产工艺等优越性外，其最大的特点就是节能。近年来，随着电力电子技术、计算机技术、自动控制技术的迅速发展，各种大功率半导体器件的相继出现，促使交流调速技术飞跃进步，变频调速已成为发展趋势。早期的交流电动机调速方法，如采用绕线式异步电动机转子串电阻调速、笼型异步电动