浙江大学硕士学位论文
ABSTRACT
Recentlyduetotheadvantageofenergy-savingandenvironmentalprotectionmanykindsofelectricvehicles(such
used.Brushlessaselectricbicycle,electricwheelchair,andelectriccar)havebeenwidelyDC(BLDC)motorsdominatethefieldofdrivemotorsforelectricvehicles,becauseoftheirsimplestructure,high
ConventionalbrushlessDCmotorsefficiency,andexcellentperformanceofspeedpositionsensorregulation.usetoprovidecommutationsignals,which
sensorlesscontrolwillincreasemotorsize,system
technologywill
simplifythenotcostandmaintenancedifficulty.Utilizingandonlysavetheconsiderablecostspaceforpositionsensor,butalsoproceduresofsystemassembly
toaandmaintenance.Oncesensorlesscontroltechnology
industry.
Basedonbecomesmature,itwillleadsignificantrevolutionintheelectricvehicletheprincipleandthemathematicalmodeloftheBLDCmotordrives,thetheoryof
andthezero-crossingdetectingcircuit
areareBack—EMFmethodintroducedandanalyzedindetail,thencompensationmethodproposed.
AnovelstartingmethodofthebrushlessDC(BLDC)motorswithoutpositionsensorforelectric
avehicles(EV)isproposed,includingdetecting
methodtoaccelerateofrotorpositionatstandstillandstart-叩the
onrotoruptoacertainspeedwheretheconventionalpositionsensorlesscontrolmethodsbasedthebackEMFcouldworkeffectively.Thewholestartingprocedureis
estimation,whichcanaccompanied、Ⅳitll
thestartingrotorpositionavoidthetemporaryreverserotationandfailureofelectricvehicles.
Furthermore,specificstrategiesofstartingtorqueoptimization
developedtoimproveelectricvehiclessystem
oneandregenerativebrakingareperformance.ThisandahardwaresystemneedsonlycurrentsensorattheDCbusoftheinverter
alow-costgeneral—purposemicrocontrollerHCS08,whichbecomessimple,compact,low-cost,andeffectivesolutionforsensorless
aBLDCmotorsinthefieldofelectricvehicles.Itisdemonstratedexperimentallythatrapidand
stablestartingCanbeachievedbytheproposedmethod.
sensorlesscontrolelectricvehiclesKeyword:BLDCback—EMFinductancesaliency
filteringdepthadjustmentregenerativebrakingIII