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ID:43725884
大小:2.01 MB
页数:60页
时间:2019-10-13
《pwm逆变器优化数字控制技术分析》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、AbstractWithanincreasingdemandforhighqualitypowerfromrelatedindustriesandimportantdepartments,high-performancePWMinvertershaveattractedmoreandmoreattention.Atthesametime,duetothedevelopmentofsemiconductorpowerdevices,aswellasimprovedsteadilyofvariousco
2、ntrolmethods,numericalcontrolhasreplacedtraditionalanalogcontrolbyvirtueofitssuperiorcontrolabilityandeasierstandardizedproductiontomeettherequirementofpowermodularization.Nowadaysthecombinationoftraditionalcontrolmethodsanddigitalcontrolmethodsisusual
3、lyadopted.However,thetraditionalcontrolmethodsundermathematicalcontrolissometimesnotsogoodastheoriginalanalogcontrol,soadetailedmodelingandanalysisaswellasadirectcontroldesignindiscretedomainispresentedinthispapertoacquiretheaccuratedigitalcontrolmetho
4、d.Thispapermainlyconcentratedondoubleclosed-loopdigitalcontroltechnologyforouterringofvoltageandinnerringoftheinverterpowercurrent.Thebasicknowledgeofinverter,thedevelopmentofdigitalcontrolmethodandboththeadvantagesanddisadvantagesofdigitalcontrolmetho
5、dscomparedwithtraditionalcontrolmethodsareintroducedfirst.Next,themodelingandanalysisfortheinverterisadoptedandtheimpactontheinverteroutputvoltagearediscussed.Amathematicalmodeloftheinverterindiscretedomainderivedfromthecircuitprincipleisacquiredinwhic
6、hthedeadzone,abeatlagandzero-orderholdareofmoreimportanceandaremoredetailedelaborated.ThedeadzoneeffectismodeledandanalyzedparticularlywhileitsequivalentdampingisthenanalyzedapproximatelyThecontrollerisdesignedindiscretedomainaccordingtotheacquiredmode
7、l,anditscut-offfrequencyisanalyzedtogetappropriateparametersforcontrollersininnercurrentloopandoutervoltageloopthroughstabilitycriterionanalysissuchasrootlocusanalysisandbodediagramanalysis.Theaccuracyofthemodelisverifiedbycomparingthestabilityofthemod
8、elandsimulationwhiletheadaptabilityofthecircuittothechangesinparametersoftheproposeddouble-loopcontrollersisanalyzed.Resultsshowthattheproposeddouble-loopcontrollerhasgoodrobustness.Finally,experimentsarecarriedouttoverifytheaccuracyand
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