2011年7月6日摘要电力电子技术出现于20世纪50年代，1957年美国通用电气公司在晶体管的基础上研制出了第一个晶闸管，当时被称作可控硅（siliconcontrolledrectifier,SCR）.晶闸管是一种利用半导体PN结原理开发出的固体可控开关，他可以用小电流控制开关导通，从而控制高电压大电流的电路。随着电力电子技术的飞速发展，各种大功率开关器件得到了广泛应用。它们一方面给电能的变换应用带来了方便，另一方面又给电力系统带来了繁重的无功控制和谐波治理问题。电力电子四开关技术应用尤为广泛。电力电子技术是研究电能形式变换的技术，这些变换的基本类型有：交流－直流、直流－直流、直流－交流和交流－交流的变换。电力电子电路是一种开关电路，具有非线性的特点，研究电力电子电路主要采用波形分析和分段线性化处理的方法。现代仿真技术为电力电子电路的研究和分析提供了极其方便的工具。四开关组成的电路既可以用于整流也可以用于逆变，本文主要介绍三相四开关逆变器，滤波器。关键词三相四开关；SPWM变换器；整流器；逆变器；滤波器AbstractPowerelectronictechnologyappearedinthe1950sandin1957thegeneralelectriccompanyonthebasisofthetransistordevelopedthefirstthyristorandthenwascalledSCRsiliconcontrolledrectifier,(SCR).ThethyristorisauseofsemiconductorPNjunctionprincipledevelopmentofasolidcontrollableswitch,hecanusesmallcurrentcontrolswitchconduction,soastocontrolhighvoltagelargecurrentcircuit.Withtherapiddevelopmentofthepowerelectronictechnology,allkindsofhighpowerswitchdevicetoawiderangeofapplications.Theyhandtopowertransformationapplicationconvenience,ontheotherhand,tothepowersystembroughtheavyreactivecontrolandharmonicmanagementproblem.Powerelectronictechnologyiswidelyusedfourswitch.Powerelectronictechnologyisthestudyoftheformofelectricalenergytransformationtechnology,theytransformthebasictypesofexchange-a:dc,dc-dc,dc-communicationandexchange-communicationtransform.Powerelectroniccircuitisakindofswitchcircuitwithnonlinearcharacteristics,studythemainpowerelectroniccircuitsofthewaveformanalysisandsubsectionlinearizationmethod.Modernsimulationtechnologyforelectricpowerelectroniccircuitsofresearchandanalysisprovidesextremelyconvenienttool.Composedoffourswitchcircuitcanbeusedeitherforrectificationcanalsobeusedforinverter,thethesismainlyintroducesthreephasefourswitchinverter,filter.KeywordsFour-switchthree-phase;rectifier；SPWMconverter；inverter；filter.目录摘要............................................................................................................................................IAbstract....................................................................................................................................II前言............................................................................................................................................1第一章三相四开关逆变器...................................................21.1三相四开关逆变器工作原理.......................................................................................21.2四开关三相逆变器与六开关三相逆变器的比较.........................4第二章三相四开关滤波器..................................................52.1三相四开关滤波器工作原理.......................................................................................52.2三相四开关滤波器的基本原理.........................................6结论..........................................................................................................................................10参考文献.................
