IGBT三相逆变电源的设计

IGBT三相逆变电源设计I摘要本文设计了一种以微处理器89C51为核心，SPWM控制器SA4828为主体的数字逆变测试电源系统。该电源采用全数字化控制，结构简单，控制灵活，为测试电源产品的开发给出了一种全新的设计方法。智能化控制是目前国内外的一个研究热点，本设计中控制核心采用性价比高的C51系列单片机。采用高速度，高性能的微处理器进行处理存储和比较，实现一些高效率的控制方法，同时实施迅速有效的保护功能。在调制方法上采用流行的脉宽调制SPWM，为了改善设备的性能，提高设备的效率，采用了先进的数字化控制脉宽调制芯片SA4828代替原来的模拟控制脉宽调制芯片HFT-4752，SA4828是Mite公司生产三相SPWM波形产生器，它可提供高质量，全数字的三相脉宽调制波形，同时为了提高驱动与保护的快速性与准确性，采取了高性能的驱动保护芯片。在供电电路上采用JS158，满足专为设计逆变装置而又使用IPM的嵌入式系统级开关电源。文中介绍SA4828的原理及其应用在逆变器中的软硬件设计方法。结果表明，采用了本文设计的数字化控制的逆变测试电源可以获得稳定的电压输出，符合一台测试电源的设计要求。数字化的测试电源最终实现了自动调节、自动检测、自动诊断和自动保护等功能，基本实现了智能控制的要求。关键词：正弦脉宽调制(SPWM)，SA4828，逆变，IGBT，89C51IGBT三相逆变电源设计IIAbstractWedesignamicroprocessor89C51asthecore,SPWMcontrollerSA4828asthemainbodyofthedigitalinvertertestpowersourcethepowersupplyadoptsthefulldigitalcontrol,thestructureissimple,Flexiblecontrolfortestingthedevelopmentofpowersupplyproducts.Anewdesignmethodisgivenintelligentcontrolisahotresearchtopicathomeandabroad,thedesigncost-effectiveC51seriessinglechipmicrocomputerascontrolcoreusedin,highspeed,highperformancemicroprocessorforprocessingStorageandcomparison,someefficientcontrolmethods,andatthesametimequicklyandefficientlyprotectfunctiononthemodulationmethodusesthepopular,astringofpulsewidthmodulationSPWM,toimprovetheperformanceoftheequipment,toimprovetheefficiencyoftheequipment,adoptstheadvanceddigitalcontrolPWMchipSA4828insteadoftheoriginalanalogcontrolPWMchipHFT-4752,SA4828isMitecompanyproducesthree-phaseSPWMwaveformgenerator,itcanbringhigh-quality,fulldigitalthree-phasePWMwaveform,atthesametimeinordertoimprovetherapidleafandtheaccuracyofdriverandprotection,tookahigh-performancedriveprotectionchip.InthepowersupplycircuitadoptsJS158,isenoughfordesignandusingIPMinverterdeviceembeddedsystemlevelswitchpowersupplyinthispaper,theprincipleandapplicationofSA4828softintheinverter.Hardwaredesignmethod,theresultsshowthattheadoptedinthispaper,thedesignofdigitalcontrolinvertertestpowersourcecanobtainsteadyfeet,voltageoutput,canmeetthedemandsofasetoftestpowersupplyameterdigitaltestpowerfinallyrealizestheautomaticadjustment,automaticdetection,automaticdiagnosisandautomaticprotectionfunction,basicallyachievedtherequirementofintelligentcontrol.Keywords:sinepulsewidthmodulation(SPWM),SA4828,inverter,IGBT,89C51IGBT三相逆变电源设计III目录摘要.................................................................................................................................IABSTRACT..................................................................................................................II第1章绪论................................................................................................................11.1课题的背景........................................................................................................11.2电源技术的发展概况........................................................................................2第2章逆变电路的基本原理......................................................................................42.1IGBT管的基本原理与特性.............................................................................42.1.1IGBT的工作原理.......................................................................................42.2逆变技术及其原理............................................................................................92.2.1现代逆变技术的分类.................................................................................102.2.2逆变电路的基本工作原理.........................................................................112.2.3电力器件的换流方式..................................................................................112.2.4三相电压型逆变电路.................................................................................122.3SPWM控制技术及其原理..............................................................................152.3.1SPWM控制的基本原理...........................................................................15第3章系统硬件设计................................................................................................183.1系统总体介绍..................................................................................................183.2系统主电路设计..............................................................................................203.2.1输入EMI滤波器的设计..........................................................................213.2.2输入整流滤波电路的设计........................................................................233.2.3逆变器和输出滤波电路的设计................................................................243.2.4RCD缓冲电路的设计..............................................................................263.3采样电路及A/D转换电路..............................................................................303.4SPWM波产生芯片SA4828及其应用...........................................................333.4.1SA4828工作原理.....................................................................................33IGBT三相逆变电源设计IV3.4.2SA4828与单片机的连接.........................................................................353.4.3SA4828的编程.........................................................................................363.5IGBT驱动电路EXB841.................