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1、IEEETRANSACTIONSONPOWERELECTRONICS,VOL.21,NO.4,JULY20061073ANovelCSI-FedInductionMotorDriveAbdulRahimanBeig,Member,IEEE,andV.T.Ranganathan,SeniorMember,IEEEAbstract—Currentsourceinverter(CSI)feddrivesareem-ployedinhighpowerapplications.TheconventionalCSIdrive
2、ssufferfromdrawbackssuchasharmonicresonance,unstableoperationatlowspeedranges,andtorquepulsation.ThispaperpresentsanovelCSIdrivewhichovercomesallthesedrawbacksandresultsinsinusoidalmotorvoltageandcurrentevenwithCSIswitchingatfundamentalfrequency.TheproposedCS
3、Idriveusesathree-levelinverterasanactive?lteracrossmotorterminalsreplacingthebulkyaccapacitorsusedintheconventionaldrive.AsensorlessvectorcontrolledCSIdrivebasedonproposedcon-Fig.1.FunctionalblockdiagramofconventionalCSIfeddrive.?gurationisdeveloped.Thesimula
4、tionandexperimentalresultsarepresented.Experimentalresultsshowthattheproposeddrivehasstableoperationevenatlowspeeds.ComparativeresultsshowthougharelativelyhighswitchingfrequencyPWMwillresultthattheproposedCSIdrivehasimprovedtorqueripplecomparedinnearsinusoida
5、loutputvoltagesandcurrents,athigherpowertotheconventionalcon?guration.levels,theCSIisswitchedatlowfrequency,(200Hz),IndexTerms—Active?lters,currentcontrol,currentsourcein-toreduceswitchinglosses.Reference[1]describesaconven-verters(CSI),harmonicdistortion,ind
6、uctionmotordrives,multi-tionalCSIdrive,whichemploysselectiveharmoniceliminationlevelinverters,pulsewidthmodulation(PWM).PWMtechnique,thatresultsinacceptablewaveformqualityatlowswitchingfrequency.TheconventionaldrivesemployI.INTRODUCTIONbulkyaccapacitorsacross
7、themotorterminalstocontrolthevoltagestresscausedduefastchangesinmotorcurrentduringVENthoughvoltagesourceinverter(VSI)-feddrivesareCSIswitching.Thepresenceofthesecapacitorsresultsinres-Emostwidelyused,currentsourceinverter(CSI)-feddrivesonanceproblem[2].Therea
8、retwomodesofresonance.They?ndapplicationinhighpowerdrivessuchasfandrives,wherearei)harmonicfrequencyresonanceandii)fundamentalfre-fastdynamicresponseisnotneeded,becauseofthefollowingquenc
