ELECTRICDRIVEFORLOCOMOTIVESStudyonthePermanentMagnetSynchronousMotorDriveSystemofRollingStock(CSRZhuzhouInstituteCo.,Ltd.,Zhuzhou,Hunan412001,China)Abstract:Thepermanentmagnetsynchronoustractiontechnologyhadbeendrawncloselyattentioninrollingstockindustryforitscharacteristics,suchaslowvolume,lightweight,highefficiencyandhighpowerdensity.Thepaperintroducedthedevelopmentoverview,advantagesandstructureofpermanentmagnetsynchronousmotor(PMSM).TheresearchoverviewofPMSMtractionsystemhadbeenintroducedfromdirectdriveanddirectlyreplacingtheexistinginductionmotortractionsystem.TheworkPMSMtractionsystemdidbyCSRZhuzhouInstituteCo.,Ltd.hadbeenintroduced.ThepaperintroducedthePMSMtractionsystemfromsystemdesignmethod,maincircuitstructure,PMSM,controlmethodandoperationandmaintenance,whichprovidesreferencefortheapplicationofPMSMtractionsystemandactivelypromotethedevelopmentofPMSMtractionsysteminourcountry.Keywords:rollingstock;permanentmagnetsynchronoustractionmotor;permanentmagnetsynchronoustractionsystem