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DSP-based electric power assis

消耗积分:5 | 格式:rar | 大小:524 | 2010-07-09

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Abstract. Thispaperintroducesadesignandimplementationofelectrically
assistedpowersteering(EAS)usingBLDCmotorforavehicle.Thecontrolarchi-
tectureconsistsoftwolayersofcontrol,namelythevehiclespeedassociatedcontrol
andthetorqueassistcontrol.Inthehigherlevelofcontrolarchitecture,thevehicle
speedcontrollerworksasanassistancelevelcontrollerforthesteeringeffort.In
thelowerlevel,thetorquecontrollergivestheeffortlevelcontrol.Thishasbeen
realizedbytorquesensorandvehiclesensorinterfacedintheDSP.Forimplement-
inginthesystem,aDSP-basedBLDCmotorcontrollerwiththree-phaseinverter
moduleisspeciallydesignedusingHall-effectsensorfeedbackandasingledc-link
currentsensor.ThisworkisimplementedinaLightCommercialVehiclehaving
arecirculatingballtypegear.Thisisforthefirsttime(EAS)beingimplemented
forthistypeofvehicleanywhereintheworld.Generally,EAShavingclutchto
disconnectthemotorinhighspeedorabnormalconditionsfromthegearbox.In
thisimplementationthemotorisdirectlycoupledtogearboxwithoutclutchandall
abnormalitiesarehandledbytheprocessor.Thisisimplementedwithoutmodify-
ingthevehiclesupplysystemlikechangingtheexistingalternatororratingofthe
batteryandusingtheexistingsensors.Thedesignissuchawaythatthefeelofthe
driverassistancecanbevariedeasilyatanytime.Theperformanceofthecontrol
systemisexperimentallyverifiedanditistestedinoneoftheLightCommercial
Vehicle(LCV).
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