基于PLC监控系统的感应电动机的设计与实现外文文献翻译中英文翻译外文翻译.docx

基于PLC监控系统的感应电动机的设计与实现外文文献翻译中英文翻译外文翻译.docx

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基于PLC监控系统的感应电动机的设计与实现外文文献翻译中英文翻译外文翻译

DesignandImplementationofPLC-BasedMonitoringControlSystemforInductionMotor

MariaG.Ioannides,SeniorMember,IEEE

Abstract—Theimplementationofamonitoringandcontrolsystemfortheinductionmotorbasedonprogrammablelogiccon-troller（PLC）technologyisdescribed.Also,theimplementationofthehardwareandsoftwareforspeedcontrolandprotectionwiththeresultsobtainedfromtestsoninductionmotorperformanceisprovided.ThePLCcorrelatestheoperationalparameterstothespeedrequestedbytheuserandmonitorsthesystemduringnormaloperationandundertripconditions.TestsoftheinductionmotorsystemdrivenbyinverterandcontrolledbyPLCproveahigheraccuracyinspeedregulationascomparedtoaconventionalA

lcontrolsystem.TheefficiencyofPLCcontrolisincreasedathighspeedsupto95%ofthesynchronousspeed.Thus,PLCprovesthemselvesasaveryversatileandeffectivetoolinindustrialcontrolofelectricdrives.

IndexTerms—Computer-controlledsystems,computerizedmonitoring,electricdrives,inductionmotors,motioncontrol,programmablelogiccontrollers（PLCs）,variable-frequencydrives,voltagecontrol.

a）INTRODUCTION

S

INCEtechnologyformotioncontrolofelectricdrivesbe-cameavailable,theuseofprogrammablelogiccontrollers（PLCs）withpowerelectronicsinelectricmachinesapplicationshasbeenintroducedinthemanufacturingautomation[1],[2].Thisuseoffersadvantagessuchaslowervoltagedropwhenturnedonandtheabilitytocontrolmotorsandotherequip-mentwithavirtuallyunitypowerfactor[3].ManyfactoriesusePLCsinautomationprocessestodiminishproductioncostandtoincreasequalityandreliability[4]朳9].Otherapplica-tionsincludemachinetoolswithimprovedprecisioncomput-erizednumericalcontrol（CNC）duetotheuseofPLCs[10].Toobtainaccurateindustrialelectricdrivesystems,itisnec-essarytousePLCsinterfacedwithpowerconverters,personalcomputers,andotherelectricequipment[11]朳13].Neverthe-less,thismakestheequipmentmoresophisticated,complex,and

expensive[14],[15].

Fewpaperswerepublishedconcerningdcmachinescon-trolledbyPLCs.Theyreportboththeimplementationofthefuzzymethodforspeedcontrolofadcmotor/generatorsetusingaPLCtochangethearmaturevoltage[16],andtheincorporationofanadaptivecontrollerbasedontheself-tuningregulatortechnologyintoanexistingindustrialPLC[17].Also,othertypesofmachineswereinterfacedwithPLCs.Thereby,anindustrialPLCwasusedforcontrollingsteppermotors

ManuscriptreceivedDecember2,2002.Paperno.TEC-00004-2002.ThisworkwassupportedbytheNationalTechnicalUniversityofAthens.

TheauthoriswiththeFacultyofElectricalandComputerEngineeringoftheNationalTechnicalUniversityofAthens,Athens15773,Greece（e-mail:

*****************.gr）.

DigitalObjectIdentifier10.1109/TEC.2003.822303

inafive-axisrotorposition,directionandspeed,reducingthenumberofcircuitcomponents,loweringthecost,andenhancingreliability[18].Forswitchedreluctancemotorsasapossiblealternativetoadjustablespeedacanddcdrives,asinglechiplogiccontrollerforcontrollingtorqueandspeedusesaPLCtoimplementthedigitallogiccoupledwithapowercontroller[19].OtherreportedapplicationconcernsalinearinductionmotorforpassengerelevatorswithaPLCachievingthecontrolofthedrivesystemandthedataacquisition[20].Tomonitorpowerqualityandidentifythedisturbancesthatdisruptproductionofanelectricplant,twoPLCswereusedtodeterminethesensitivityoftheequipment[21].

OnlyfewpaperswerepublishedinthefieldofinductionmotorswithPLCs.Apowerfactorcontrollerforathree-phaseinductionmotorutilizesPLCtoimprovethepowerfactorandtokeepitsvoltagetofrequencyratioconstantunderthewholecontrolconditions[3].Thevectorcontrolintegratedcircuitusesacomplexprogrammablelogicdevice（CPLD）andintegerarithmeticforthevoltageorcurrentregulationofthree-phasepulse-widthmodulation（PWM）inverters[22].

Manyapplicationsofinductionmotorsrequirebesidesthemotorcontrolfunctionality,thehandlingofseveralspecificanaloganddigitalI/Osignals,homesignals,tripsignals,on/off/reversecommands.Insuchcases,acontrolunitin-volvingaPLCmustbeaddedtothesystemstructure.ThispaperpresentsaPLC-basedmonitoringandcontrolsystemforathree-phaseinductionmotor.Itdescribesthedesignandimplementationoftheconfiguredhardwareandsoftware.Thetestresultsobtainedoninductionmotorperformanceshowimprovedefficiencyandincreasedaccuracyinvariable-loadconstant-speed-controlledoperation.Thus,thePLCcorrelatesandcontrolstheoperationalparameterstothespeedsetpointrequestedbytheuserandmonitorstheinduct