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1、IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.55,NO.2,FEBRUARY2008501PermanentMagnetSynchronousMachineHybridTorqueControlFlorentMorel,Member,IEEE,Jean-MarieRétif,XuefangLin-Shi,andClaireValentinAbstractThispaperpresentsacontrolschemesuitableforsystemscomposedofaco
2、ntinuousprocessmodulatedinenergybyapowerconverterwitha?nitenumberoftopologies.Totrackthecontinuousreferencevalues,atopologyofthepowerconverterisdeterminedfromacriterionbasedonaprocessstatevariablemodelandtakingintoaccountthepossibletopologiesofthepowerconverter.
3、Theproposedhybridcontrolschemeisappliedtoanelectricalmotordrivecomposedofaninvertercoupledtoaperma-nentmagnetsynchronousmachine.Anevolutionwhichinsuresa?xedmodulationfrequencyisalsoproposed.Experimentalresultsvalidatethefeasibilityandeffectivenessoftheproposedsc
4、hemes.IndexTermsDirectcontrol,hybriddynamicsystems,perma-Fig.1.Pilotphysicalsystemwithswitches.nentmagnetsynchronousmachine(PMSM),physicalsystemswithswitches(PSS).thediscretestate-variablesofthePSS.Bothcontinuousanddiscretevariablesareconsideredforthehybridcontr
5、olschemeI.INTRODUCTIONapplication.Thesystemconsideredisclearlyhybrid(withLARGEnumberofindustrialapplicationsexistwherecontinuousanddiscretevariables)sohybridcontrolstrategiesAthephysicalphenomenaareverywelldescribedbydif-applyadequately.ferentialequations.Howeve
6、r,discretevariablesarenecessaryForPMSMdrives,vectorcontrolhasbeenastandardfortorepresentthebehaviorofasystemwithmultipletopologiesmorethan20years[3].Itdoesnottakeintoaccountthediscreteormodes.Modelingandcontrolofphysicalsystemswithnatureoftheinverterstatesanddoe
7、snotrealizeadirectcontrolswitches(PSS)hasattractedconsiderableattentioninrecentoftheswitches.Indeed,theoutputsofthiscontrolleraretheyears[1].OneclassofPSSiscomposedofacontinuousprocessmeanvoltagestobeappliedtothemotorwindings[4].Becausecontrolledbyanenergymodula
8、torthathasa?nitenumberoftheinverterisconsideredbythecontrollerasagain,pulsewidthcon?gurations.Ahydrauliccylindercontrolledbyanon/offmodulation(PWM)isusedtotranslateth
