ndaccuratetorquecontrolperformancethatconsidersbothironlossandcross-magneticsaturation.Experimentalresultsofmaximum-efficiencycontrolona.kW-P-(r/min)IPMSMwithconcentratedwindingsdemonstratethevalidityoftheproposedmethod.II.D-ANDQ-AXISINDUCTANCESOFTHETESTEDMACHINEThetestedmachineinthisstudyisaconcentrated-windingIPMSM(.-kW,-min-,-poles,-slots).Fig.showsthecrosssectionoftherotorofthetestedmachine.Fig.showsthemeasuredd-andq-axisinductancesLd(id,iq)andLq(id,iq)asafunctionofd-andq-axiscurrentsdeterminedfrompreviousresearch[].Fromthisfigure,itisclearlyseenthatforLqtheinfluenceofcross-magneticsaturationissmallbutforLdthetendencyoftheinductancetodecreaseasidincreasesinflux-weakeningzone.III.MAXIMUMEFFICIENCYVECTORCONTROLMETHODA.TheRepetitionCalculationMethodFig.showstheequivalentcircuitdiagramofIPMSM,wherevdandvqarethevoltages,iqandiqarethecurrents,imdandimqarethemagnetizationcurrents,andLd,andLqarethed-andq).[]H.F.Hofmann,S.R.SandersandA.EL-Antably:“St