小方坯连铸电气控制系统研究-电力电子与电力传动专业论文.docx

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2018-05-05 发布于上海
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小方坯连铸电气控制系统研究-电力电子与电力传动专业论文.docx

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小方坯连铸电气控制系统研究-电力电子与电力传动专业论文

Title:Researchontheelectriccontrolsystemofbilletcontinuous castingMajor: PowerElectronicsandElectricalDriveske例生NamezShenYuSignature:?也习得斗Supervisor:AssociateProf.HaowenLISignature:;3;-白人ωWAbstractContinuousmetalcastprocessisanewtechnologyofliquidsteeldirectlycasting intobilletsteel，whichultimatelychangestherulepositionofthediecastinginmetallurgy.Alongwiththedevelopmentandinnovationofwoldeconomictechnology，especial1yalongwith widely application ofthetechnology ofautomation andpower electric，theelectroniccontroltechnologyhasbeenoneofthemostimportantmethods.Moldlevelcontrolisanimportantpartduringthemetallurgycontinuouscastingmoulds.Thelevelfluctuationmayleadtoprotectivedregsandtheimpuritiesgetintothesteelwat民whichcouldaffect也equalityofthesteelorevencausethesteelwatertoleakandoverflow.Sothelevelmustbecontrol1edwithinareasonablerange.Thispaperdesignsthehardwa:τeoflevelcontrolsystembySimensS70-300PLC，andestablishsthePIDlFuzzy-PIDcontrollermodleofthemoldlevelcontrolsystem byMATLAB/SIMULINK.Atlast，thecontrastbetween theresultsofsimulatedbyMATLAB/SI:t\矶JLINKisshowninthispape汇Theoscillationofcontinuouscastingmoldisanimportantfactor也athωeffectoncastingproduction.Theosci1lationofcontinuouscastingmoldhasexperiencedthreekinds:Synchronism，Sinusoidalandnon-sinusoidaloscillation.Non-sinusoidalosci1lationhasthecharactersthattheupwardtìmeofthecontinuouscastingmoldislongerthanthedownwardtime.Itcanreducethefrictionbetweenthemoldwal1andthestrandsurface，andprevents出estrand 仕om leaking and cracking，it can also improve the surface quality of slabs.Sonon-sinosoidaloscillationwhichhasthedef1ectiveanglethatischangeableispresentedinthispaperbaseondesignbyacooperation.ThehardwareofthissystemiscomposedbyBRcontrollerandelectricservo.Theexperimentiscompletedfinally.Theresultofexperimenthasindicated 出atnon-sinosoidal oscillation ofmould canberealized correctly. Andthissystemwhichcanadjustthe仕equencyofthenon-sinosoidaloscillationassoonaspossiblewhenthemotorspeedhaschangedlayafoundationfo