for Medium-Voltage Induction Motors感应电动机

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1、PracticalAspectsofRotorCageFaultDetectionforMedium-VoltageInductionMotorsBinLuZhiGaoJoelBenzingSeniorMember,IEEESeniorMember,IEEESeniorMember,IEEEEatonCorporationEatonCorporationEatonCorporationBldg.3,No.280LinHongRd1000CherringtonPkwy211HeywoodRdShanghai200335Chi

2、naMoonTwp,PA15108USAArden,NC28704USABinLu@Eaton.comGeorgeGao@Eaton.comJoelEBenzing@Eaton.comAbstract--Predictivediagnosticsofferingearlyfailurevibration,largetemperaturevariationsandfrequentwash-detectionoflargeinductionmotorsappliedinmetals,pulp&down.Suchenviro

3、nmentalandmechanicalstressescouldpaperandotherprocessindustriesarebecomingincreasinglyleadtomotordegradationandmalfunctionoverthelongrun.important.Asmotorsgrowlarger,industryhasbecomeThemonitoringandprotectionofsuchmedium-voltageincreasinglyreliantontechnologiesto

4、detectrotorfaultsviaon-inductionmotorsisanessentialelementintheoveralllineprognosticsandarrangeoptimalmaintenanceintervalstoincreaseproductivity.Traditionalbrokenrotorbarfaultindustrialprocessesprotectionschemetoavoidfinancialdetectionalgorithmshavehistoricallyrel

5、iedlargelyonlossescausedbyunexpectedprocessdowntime[5].monitoringchangesinthestatorcurrentspectra.ThisoftenAmongvariousfactorsthatcausemotorfailures,rotorresultsinnuisancewarningswhenthemotoroperatesatcagefaultisoneofthemostcommonfaultsoflargemedium-differentloadl

6、evels,orwhenbaselinedataathealthymotorvoltagemotors[6]-[11].Fig.1showsthedistributionofoperationsarenotavailable.Toaddressthisissue,afaulttypicalinductionmotorfailedcomponentsbasedonfieldseverityevaluationtechniqueisintroducedinthispapertodetectrotorcagefailuresus

7、ingonlycurrentandvoltageinvestigations[9]-[10].measurements,plusselectedmotornameplatedataandmotor’sComparedtotheirlow-voltagecounterparts,medium-geometricdimensions.Thefaultseverityindexcanindicatevoltagemotorsareoftenrotor-limitedratherthanstator-thepossibilityo

8、farotorcagefaultevenintheabsenceoflimited,i.e.,duetothehighthermalstressesimposedonthebaselinedata.Thisguaranteesthealgorithm’sreliabilityinrotorstructu