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1、IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.60,NO.5,MAY20132031ACarrier-BasedUnbalancedPWMMethodforFour-LegVoltageSourceInverterFedUnsymmetricalTwo-PhaseInductionMotorYuttanaKumsuwan,SuttichaiPremrudeepreechacharn,Member,IEEE,andVijitKinnares,Member,IEEEAbstractThispaperpre
2、sentsacarrier-basedunbalancedmetricalandunsymmetricalTPIMdriveshavebeenpresentedpulsewidth-modulatedmethodforatwo-phasefour-legvoltageintheliterature,forbothCBPWM[12]–[17]andspace-vectorsourceinverter(VSI)anditsrealizationforanunsymmetricalPWM(SVPWM)schemes[18]–[25].Themost
3、populartopolo-two-phaseinductionmotor.Amodulationstrategyisdevelopedgiesaretheunbalancedtwo-phasethree-legVSIdrivesusingtosynthesizeunbalancedtwo-phaseoutputvoltagewaveformsbasedontheunipolarmodulationtechniquewithopen-loopV/fPWMcontrol.Theprincipleoftheclassicalthree-legVS
4、Iiscontrol.Theproposedcontrolschemeallowsindependentmagni-itscoupledcontroloftheauxiliaryandmainwindingvoltagestudecontrollabilityandquadraturephaseangleforunbalancedwiththeorthogonalreferencetwo-phasevoltagesingeneratingtwo-phaseoutputvoltages.Thus,themodulationalgorithmma
5、kesathree-levelSVPWMoutputvoltagethatisappliedtothethefour-legVSIinequitablewithunbalancedtwo-phaseloads.TPIM.Itoffersgoodsteady-stateanddynamicperformancesSimulationandexperimentalresultsconfirmthefeasibilityofthecontrolmethodfortheinverter.andreductionsinphasecurrentdistor
6、tionandtorqueripple.However,thistechniqueislimitedinitscomputationalintensityIndexTermsCarrier-basedpulsewidth-modulated(PWM)andmoderatedcvoltageutilization.IntheCBPWMschemes,(CBPWM)method,open-loopV/fcontrol,two-phasefour-legvoltage-sourceinverter(VSI),unsymmetricaltwo-pha
7、seinductionthemethodproposedin[14]and[15]introducedafour-legtwo-motor(TPIM).phaseVSIsupplyingtoaTPIM.ThePWMtechniqueusedtworeferencevoltagesanddoubletriangularcarrierwaves.I.INTRODUCTIONInthistechniquedrive,thetwo-phasevoltagesaredecoupledandcanthereforebecontrolledindepend
8、ently.AlthoughtheULSEWIDTH-MODULATED(PWM)voltage-sourcein-four-legtwo-phaseVSIwith
