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1、重庆大学硕士学位论文II英文摘要ABSTRACTWiththeincreasinglyseriousproblemsofenergyshortageandenvironmentalpollution,theresearchonElectricVehicle(EV),whichhasagreatadvantageinenvironmentalprotectionandenergyefficiencyhasbecomeanimportantdevelopmentdirecitoninautomobilefield.Themileaged
2、eficiencyhasbecomeoneofthemainbottleneckforthecommercializationofelectricvehicles.Theregenerativebrakingsystemcanconvertthemechanicalenergyintoelectricalenergy,realizingtheregenerativeuseofbrakingenergy,whichcanimprovetheenergyutilizationefficiencyandextendthedrivingra
3、ngeofelectricvehicles,thusitisofgreatsignificancetothedevelopmentofelectricvehicles.Sinceregenerativebrakingsystemhasalimitedcapability,itneedstoprovidebrakingforcetogetherwithmechanicalbrakingsystemformingahybridbrakingsystemtomeetextremebrakingdemands.Therefore,howto
4、allocatethemotorregenerativebrakingforceandmechanicalbrakingforceofthehybridbrakingsystemandcoordinateABScontroltoensurethebrakingsafetyofvehiclesandmeanwhilerecoverthemaximumbrakingenergyisofgreatimortance.Inthisthesis,thequarter-vehiclemodelofain-wheel-motorvehiclewa
5、sstudied,ofwhichthehybridbrakingsystemiscomposedofpermanentmagnetsynchronousmotor(PMSM)regenerativebrakingsystemandelectro-mechanicalbraking(EMB)system,andanintegratedcontrolstrategybasedonhybridbrakingforcedistributionandABScontrol,consideringbrakingperformanceandener
6、gyrecoveryandbrakingmodewasproposed.Inthispaper,afterintroducingthePMSMvectorcontrolprinciple,theregenerativebrakingcontrolalgorithmbasedonzerodirect-axiscurrentvectorcontrolofPMSMintheelectricwheelwasstudied.Andalsothedetailedenergyfeedbackprocessoftheregenerativebrak
7、ingsystembasedonSVPWMmodulationwasanalyzed.Simulationresultsproveditsefficiency.Inordertoachieveoptimalbrakingperformance,theslidingmodevariablestructurecontrolalgorithmbasedontheoptimalslipratiowasusedfortheABScontrolinthisthesis,whichfeaturesitsgoodrobustnessandstabi
8、lization.Then,undertheconsiderationoftheworkingcharacteristicsoftheEMBandPMSM,anewintegratedcontrolstrategyincludingt
