毕业设计-英文文献及翻译-电气电子信息类专业

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1、毕业设计（外文翻译材料）学院：专业：学生姓名：指导教师：电气与电子工程学院电子信息工程谭博学2008年4月外文翻译（原文）MinimizationandidentificationofconductedemissionbearingcurrentinvariablespeedinductionmotordrivesusingPWMinverterAbstract.Therecentincreaseintheuseofspeedcontrolofacinductionmotorforvariablespeeddriveusingpulsewidthmodulation(P

2、WM)inverterisduetotheadventofmodernpowerelectronicdevicesandintroductionofmicroprocessors.Therearemanyadvantagesofusingacinductionmotorforspeedcontrolapplicationsinprocessandaerospaceindustries,butduetofastswitchingofthemodernpowerelectronicdevices,theparasiticcouplingproducesundesirable

3、effects.Theundesirableeffectsincluderadiatedandconductedelectromagneticinterference(EMI)whichadverselyaffectnearbycomputers,electronic/electricalinstrumentsandgiverisetotheflowofbearingcurrentintheinductionmotor.Duetotheflowofbearingcurrentintheinductionmotor,electricaldischargemachining

4、takesplaceintheinnerraceofthebearingwhichreducesthelifeofthebearing.Inhighpowerconvertersandinverters,theconductedandradiatedemissionsbecomeamajorconcern.Inthispaper,identificationofbearingcurrentduetoconductedemission,themeasurementofbearingcurrentinamodifiedinductionmotorandtominimizet

5、hebearingcurrentarediscussed.Thestandardcurrentprobe,thestandardlineimpedancestabilizationnetwork(LISN)),theelectronicsinterfacecircuitsareusedtomeasurehighfrequencycommonmodecurrent,bearingcurrentandtominimizetheconductednoisefromthesystem.TheLISNwillpreventtheEMInoiseenteringthesystemf

6、romthesupplysourcebyconductivemethods,atthesametimepreventstheEMIgeneratedifanyduetoPWM,fastswitchinginthesystem,willnotbeallowedtoenterthesupplyline.ForcomparingtheresultswithFederalCommunicationsCommission(FCC)andSpecialCommitteeonRadioInterference(CISPR)standards,thegraphsareplottedwi

7、thfrequencyVs,linevoltageindBμV,commonmodevoltageindBμVandthebearingcurrentindBμAwithoutandwithminimizingcircuits.31外文翻译（原文）Keywords.EMI;a.c.drives;bearingcurrent.1.IntroductionWiththedevelopmentofpowerelectronicdevicesliketheinsulatedgatebi-polartransistor(IGBT),thepower