交流电机变频调速系统毕业论文

I摘要本文首先在对该系统的整体结构、控制方案和各部分功能实现的方法进行了详细分析，并设计出该系统的硬件电路。其中硬件电路包括主电路和控制电路，在控制电路中以ARM(LPC2148)控制器为核心，通过键盘的给定频率并由LPC2148控制智能模块SA4828产生可调频率的SPWM方波,并通过SPWM控制技术对交流电机实现恒压频比控制，并用数码管对当前频率进行实时显示。主电路包括整流、滤波和逆变电路。为了三相交流异步电动机的可靠性，还设计了软启动电路、过欠压、过热、过流保护电路。使设计的可靠性得到了提高。在软件设计中，采用通用的模块化设计方式，编写了三相交流异步电动机调速程序，并且使用C语言进行程序，在ADS(ARMDeveloperSuite)开发环境下编译、链接、运行通过。论文的创新点在于将ARM嵌入式微处理器作为控制核心结构简单、可靠易行。相对于传统交流调速，该系统采用全数字式控制方式，极大地提高了系统的实时性能。关键词:ARM变频调速智能功率模块恒压频比控制SPWMIIAbstractInthispaper，firstThewholestructureandcontrolschemeofthesystem,realizationmethodsforallPartshavebeenanalyzedindetail,then,thefeasibilityofdesignisdemonstrated,andhardwarecircuitisdesigned.Thesystemhardwarecircuitiscomposedofthepowercircuitandcontrolcircuit,thecontrolcircuitusesLPC2148asitscore，thefrequencyisgivenwithkeyset,theLPC2148controlintelligentmoduleSA4824,andcangenerateavariableSPWMwave,thissystemuseSPWMTechnologytorealizeconstantU/fControlofACmotor,anddisplaysfrequencyatpresentwithLEDThePowercircuitincludesrectification，filteringandinverter.InordertoimprovereliabilityofthreePhaseACasynchronousmotor,thepaperalsodesignedsoftstartcircuitandotherprotectcircuitssuchastheundervoltageandovervoltage,thetoooverheatedandtheoutputflow.Sothatthereliabilityofthedesignhasbeenenhanced.Softwareisdesignedtheprocess,thespeed-adjustedprogramofthreePhaseACasynchronousmotorcontrolsystemhasbeenWrittenwithClanguage，compiled,linkedandruninADS(ARMDeveloperSuite)environmentsuccessfully.TheinnovationofthispaperconsistsinitssimplicityandreliabilityusingARMembeddedmicroprocessorasthekernel.RelativetotraditionalVariablespeed,thissystemadoptsdigitalcontrol,andpromotestheperformanceandanti-jammingKeywordsARM，variablefrequencyvariablespeed，U/fcontrolmethod，SPWMIII目录摘要....................................................................................................................IAbstract.............................................................................................................II第1章绪论......................................................................................................11.1电机调速发展现况和趋势....................................................................11.2电力电子技术的发展现况和趋势........................................................21.3国内外交流调速现状............................................................................31.3.1国外现状.....................................................................................31.3.2国内现状.....................................................................................31.4本论文的研究内容................................................................................4第2章主电路设计...........................................................................................62.1主电路原理图......................................................................................62.2输入整流滤波电路的设计...................................................................72.2.1EMI滤波电路.............................................................................72.2.2输入整流电路.............................................................................72.2.3输入滤波电容容量的计算.........................................................82.2.4电源指示灯...............................................................................102.3逆变电路的设计..................................................................................102.3.1主功率管IGBT的容量计算....................................................102.3.2续流电路...................................................................................112.3.3吸收电路...................................................................................112.3.4制动电阻...................................................................................12第3章控制电路设计.......................................................................................143.1控制原理图.........................................................................................143.2ARM的最小系统设计........................................................................153.2.1微控制器LPC2148....................................................................153.2.2时钟和复位系统........................................................................153.3显示电路.............................................................................................183.3.1数码管控制芯片MAX1279.....................................................193.4三相SPWM控制器SA4828..............................................................203.4.1寄存器软件设计.......................................................................203.5按键、指示灯和报警..........................................................................233.5.1按键...........................................................................................23IV3.5.2指示灯.......................................................................................23第4章IGBT驱动电路设计...........................................................................254.1驱动电路原理图..................................................................................254.1.1驱动电路M57962L...........................................................