基于開關變壓器式的電機軟起動器研究.pdf

1、西安科技大學碩士學位論文基于開關變壓器式的電機軟起動器研究姓名：張大釗申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：杜京義@Subject:TheResearchofMotSoftStarterbaseonSwitchingTransfmerSpecialty:ControlTheyControlEngineeringName:ZhangDazhao(Signature)Instruct:DuJingyi(Signature)AB

2、STRACTInthethesisadverseeffectonthegridmotitselfcouldbecausedbythehigherstartingcurrentwhentheACmotstarting.Bythediscussionofthetraditionalmotstartingmodetheswitchingtransfmersoftstartingmodeisdetermined.Thesolutionismen

3、ovelsoftstartingmethodftheswitchingtransfmerconceptisintroducedtheproblemofpowerelectroniccomponentsvoltageinadequateissolved.Inthehigherpowermotstartingprocessbythecontrolofthyristfiringanglethemotstartingcurrentissmoot

4、hedthestartingtqueimpactisreducedtheeffectofmotfastsmoothisachieved.Theswitchingtransfmersoftstarterisanalyzedmodeledinthethesistherelationsofthyristfiringangleswitchingtransfmerimpedancearegiventhetheeticalbasisofsoftst

5、artingisprovided.OnthebasisofittheSimulinkpackageintheMatlabisusedfbuildingthesoftstartermodelwhichincludingcontrollersectionoverzerosamplingcurrentsamplingsection.Therelevantsimulationcontrastexperimentsareputtedupthere

6、sultsshowthatthemotstartingcurrentisreducedeffectivelythetqueimpactisloweredwiththissoftstartingcontrolsystem.BasedontheabovemodelestablishedcontrolprincipleafuzzyPIDalgithmofadjustsystemcontrolvolumeisintroducedwhichisu

7、sedinthemotsoftstartingprocessthesimulationexperimentsshowthatithasbetteradaptabilityrobustness.Accdingtotheswitchingtransfmersoftstarterwkingprincipletherelevantsoftwarehardwareofsoftstartingcontrolleraredesigned.Thesyn