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《畢業(yè)設(shè)計(jì)-英文文獻(xiàn)及翻譯-電氣電子信息類(lèi)專(zhuān)業(yè)》由會(huì)員上傳分享，免費(fèi)在線(xiàn)閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、畢業(yè)設(shè)計(jì)（外文翻譯材料）學(xué)院：專(zhuān)業(yè)：學(xué)生姓名：指導(dǎo)教師：電氣與電子工程學(xué)院電子信息工程譚博學(xué)2008年4月外文翻譯（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外文翻譯（原文）Keywords.EMI;a.c.drives;bearingcurrent.1.IntroductionWiththedevelopmentofpowerelectronicdevicesliketheinsulatedgatebi-polartransistor(IGBT),thepower
