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电动车用无刷直流电机无位置传感器控制的研究(6)

发布时间:2021-06-06   来源:未知    
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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

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