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1、StudyandSimulationonVariableFrequencySpeed-RegulatingSystemofMineHoistBasedonPLCFuzzyControlYanxiangWU,ZhanfeiTianCollegeofEngineering,ShanghaiOceanUniversityShanghai,ChinaMinjieXueFacultyofEngineeringandInformationTechnology,UniversityofTechnologySydneyNSW,AustraliaAbstract—Basedonthetraditionalspe
2、edcontroltechnologyfortheMineHoistsystem,thispaperintroducesanewmethodtocontrolthespeedofACinductionmotorbycombiningthefuzzycontrollerusingtheProgrammableLogicController(PLC)andthegeneralfrequencyinverter.Theproposedmethodmakesthesystemmorereliable,stableaswellasintelligent,andisexpectedtohaveapromi
3、singfuture.ThesimulationiscarriedoutundertheSIMULINKenvironmentinordertooptimizethesystemperformance.Keywords—PLC;MineHoist;FuzzyControl;SimulinkI.INTRODUCTIONNowadays,astothetimevariantofthespeedcontrolofminehoistinminingindustry,itisbecomingmorecommontocontrolthevelocityofminehoistbyjointlyusingPL
4、Candfrequencyinverter.However,itisdifficulttobuildthemathematicalmodelforthespeedcontrollerandimplementtheautomaticcontrolbecauseofitsnonlinearcharacteristic.Thefuzzycontroltheory,whichisanintelligentcontroltheory,solvestheproblemproperly.Fuzzycontrolisbasedonthepracticalexperienceofoperatingthecont
5、rolobject.Theinternalstructureandmathematicalmodelofthecontrolobjectisnotnecessaryforthefuzzycontrol,whichisverybeneficialtotheautomaticcontrolofvariablefrequencyspeed-regulatingofminehoist.Asanotherimportantelementinthecontrolsystem,PLChasstrongfunctioncommandsandcooperatesvariousfunctionalmodules,
6、whichmakesitpossibleforPLCtosupportmanycomplicatedprocesscontrolsystems.II.GENERALDESIGNThevariablefrequencyspeed-regulatingcontrolsystemofMineHoistbasedonPLCfuzzycontrolconsistsofthepowerplant,thehydraulicstation,thePLCcabinet,theconvertor,theoperationpanelandthecontrolandsupervisionsystem,asshowni
7、nfigure1.Figure.1HardwareFrameDiagramforVariableFrequencySpeed-RegulatingSystemofMineHoist1.Thepowerplant:Itincludesthemainmotor,thereducer,thewindingdrum,thebrakeandthebase.Thepowerplantisresponsible
