当前位置:文档之家› Research of Drive Control System in Electric Vehicle based on DSP

Research of Drive Control System in Electric Vehicle based on DSP

Research of Drive Control System in Electric Vehicle based on DSP
Research of Drive Control System in Electric Vehicle based on DSP

ICSP’04Proceedings

ResearchofDriveControlSysteminElectricVehiclebasedon

DSP

LitIQuanZhon8YiZhouZude

fscllooIoflnlbnnationEngineering.WuhanUniversityoftechnology,WuhanChina430070)

E-mail:。z。h。.o..n...m,.a..e.t..(茄。,..o..u..b...1.i.c....w.——h——.—h——b—一.on

AbsUactBecatlselbregroundot"ElectricVehicledevelopmentbectnllesbrightfutureii|orcandmoreandtechniquethatcorrelatestoitsc‘,11tlnaotlsilnprovenleBtsinstep.DSP?basedDrive

ContmlmstemofEVvailengendermajoreconomicaIvaluemidsoeietyefibcl13litIntroducesresearchofDiroctTorqueCotltrOI(DTC)speedcontrolsvstemwhichwillapplytoTM¥320F2407DSPwhichbasedEVdr;vecentrelsystem,andcarriasonsomeresearchofttspert'ornlanceatlowspeedespecially141

Keywords;SignalProcessor(DSPjDirectTorqueControl(DTC)ElectricVehicle(EV)DriveCentrelSystem

1.Introduction

DirectTorqueConta'ol(DTCltechnologycalculatesand

controlsACmotortorquedirectlywithanalyzingwaysof

spacevectorsundel’statorCOOrcIination,generates

PWM

(PLtlseWidthmodify)signalswithdiscretetwospots

modulation(Band—BandContr01)byusingstatormagnetic

fielddirectionandtakedirectedcentrelonswitchstateof

ln~ellOl’optimall?inordertoobtainhighlydynanuc

pclforrnanceofltstol-quef1JItomitscomplexvectortransformandsimplie'ingoparationofmotormathematicalmodel,hasnotgeneralPWMsignalgeneratorItisakindofACspeed

controlwaywithhighlystatic-dynamicperformanceIn

addilianDTCadoptstablequerymodeofswitchstatefor

confirmingswitchstateofACmotor,whichmakescontrol

m‘stemStlalCtUl℃simplifyandrealizeentiredigitalization

easily…AssoonasDTCwassupported,itgotgreatattentionatlargescaleanddevelopedrapidlyforitsnovelcontrolidea,simplifiedsystemstructureandfined

performanceAtpresent,thennnlberoftrolleysandelectriccaginewithDTCsvstem

ofthusedb、ABBCompanyismorethan1000.“1

2.ElectricVehicle(EV)controlsystemtheorywithDTC

Fhehardx、1areofEVdlivecontrolsystemismadeof

strongpowerandlightpowerpartItoftenneedstocombinewithⅫfftwaredesignduringthedesignof掣stemhardwareso

‘0。’1。。7。。‘8’。’0’。3‘’。-。。8。。4。。。0。‘。6。。。-。。7。。/。。0。。。4。。/。。¥。。。2。。。0。。’.。0。‘。0。’。@。。。。‘。2‘。。0。。。0。。。4。。。。I。。E。+。E。’—E—.manydemandsandsolutionsarebroughtforwardTherearealotofproblemsandcorresponsivesettlementsadditionally

&wingrealizingproductionsAllofabovewillbediscussedinthispaper

FiglhardwaretheoryofEVdrivecontrolsystemItlsshewnasfigurelwhenEVstartsinpower,DSP

controlsystemgeneratescontrolimpulsesignalsbycircling

allotterwithdeadzonewhieharcsendto10BTpowermeduletriggersPowermodule

transformsDCinbatteryinto3-phaseAC_byitstriggersthatprovidesforEVmotorItsspeed,

voltageandcurrentarcsampledandtranslatedinto

corresponsivevoltagesignalsprovidingtotDSPprocessing

FinallyDSPcarriesoncontrolalgorithm

andgenerates

controlsignalsandloopsaboveprocedureWhenDSPfmdsthatYOstepischanged,itsprogramalgorithmregulates

corresponsively

DTCsystemineludes8paris:voltagetrlmsform.cml'ent

transform,asynchronousmotormathematicslmodel,

coordinatetransform(UCToutput),torquecalculatingand

modulationunit,zerostateselectionunit,magneticflux

linkagecontrolunitandswitchselectionunit,whichare

showninfigure2

Magneticfluxlinkagemodelhas3kindsofones

presently:U—_I

model.I刈medel.U划modelThe

controlperformanceofitsprojectatlowspeedisdiscussed

mainlylnthisPaDer

Fi92softwaretheory.ofEVdrivecontrolsystearU一|modellsthesimplestandcommonestone迅those

onesAthi8hswea.becausetheinfluenceofstatorresistancelsvcrv

small.controlprecisionisfinerelativelyButthe

influence。l’stalorresistancemaditseul'remch蟛ng鲢lOWspeed.controlen∞rwillbelargerbyitschange,

l—粕modelresolvesmainlythefacingproblemofU—4

modelattowspeed,useswithrotorre,stance,rotorleakageinductanceandrotorspeed:sothismodelisappliedatlow

speedButtherearetoomanyparametersfileused,control

en蛩rwillbemoreobvious.

U—Nmodelcombineswithadvantagesofabovetwo

models。andrealizetoswitch5mloothtyatthesametime.1—_Nmodelisadoptedatmiddlespeed.but目modelis

transmittednaturallyathighspeedThiskindofmodelis

complexandisthet_esearehfocuslnfllispaper

3.MiddleSpeedControlMod《lofDTCControlSystem

Atmiddlespeed,statorfluxlinkageisdeterminedby

fomaulsl:

eAO=睡。,一j,驻冰:)dt(1)

Here,RsismotorstatorresistanceBythisway,themeritisthattheonlymotorpmmeterisRwhich㈨beensuredeasilyduringthecalculatingprocessStatorvoltageUs(t)andstatorcun'antIs(t)arealsophysinaiparameterswhichcallberesolvedeasilyinthisformula强js蕞聪ofway攮鞋enslIreSstatolfluxlinkagebystatol’voltageandstatorcurrentis

namedasl卜Ireedel

ExperimentResultsandAnalysis:

(1)Motorsinglephasevoltagewaveform

(2,MotorstatornulTentwaveform通20Hz

Becausehexagonfluxlinkagecontrolprojactisadopted,motorsinglephiLsevoltagewaveformsimulatessine

wavefbrmoutputlikingladder.Whenmotormllsin20Hz髓lowspeed,statorcurrentwaveformCanberegardedflssine

waveformapprox.imateiy,butitisnotsmooth,sothestateofmotorisnotveryideal

Fromthesewaveforms,itcanbeeoacladedthatU*I

modalwillgetri#tresultwhenintergradedresultisrelativelybig,淞wiscau∞dbystatorresistanceRsAthi垂speed,

controlsystemoanobtaingoodprecisionwithU-ImodeI、

becausetheproductofcurrentandresistancepmportioningtowholeintegralresultisverylittleAtlowspeed,because

counter-electromotiveforceistoo.q'nall,theproductof

currentandresistanceproportioningtowholeintegralresultisrelativelybig.Becausecurrentsamplea翻resistancechangecauseelTortoincrease,especiallystatorfrequencyisclosetozero,ensuringstatorfluxlinkageisalmostimpossiblebythisway,b∞ausevoltagedropbetweenstatorvoltageandstatorresistanceusedbyintegrationisdisappearedsothatonlyerrorisintegratedinstablestate+Frommentionedabove,themeritsof臻0modelcallbeseenthatcontrolstructureisrelativelysimple,coordinateoperationisverybrief,motorparameteroffluxlinkageandtorqueoperationhasonlystatorresistance

1…州J一肘一~~一一眦搿一一肿一蜒

Sothis

controlproieCtdependsonmotorparameterlittleand

itsrobustnessisvet,

.'yniceMoreoverbecausestatortlux

linkagedirectionalcontrol

isadopted,dynamicresponse

1s

vei'、fastHowever,itsshortcomingisthatZerostatelasttime

wlIlbet(’0longatlowspeed,voltagedropofsuitorflux

linkagemakesitsshapedeflect,SOfundamentalwave

amplitudefalls.whichmakes

SOmeinfluence

on

control

sVslemBecausefluxlinkageshapeofthiscontrolsystemIS

hexagon.its

inlluenceof

eUlTent

harmonic

on

EVbattery

can

not

beignolcd

4.A¨.SpeedControlModelofDTCControlSystem

U—N

all,speedmodeladoptsthatitobtainsstatorflux

linkageby

stator

voltageandspeedItcombineswithU—Imodel

and

I—N

modeltraitsInputofU—Nmodelisstator

voltageandsDeodsignalSO

asto

obtainothermotor

parametcra

SoU_NmodeliSalsoealledmotormodel,it

simulateseverymotorphysicalparametersverywell

Motor

in【xtelnotonlycombineswith

U—I

modelandI—_Nmodel

merits.butalsoi.esotvesswitchproblemnaturallyAthigh

speed.motor

model

worksin

U—Imodel。flux

linkageinfact

lS

obtainedbystatorvoltageandmatoronlTentBecauseof

statoJ‘resistance,rotate

speed

error

andfluxlinkage

error

causedbymotorparametershave

no

meaninginthisscopeAt

Iov。rspeed.motormodelworksinI--Nmodel,because

of

currentviewfinderandPI

adjustoraction.itCanreviseand

acliust

stator

resistance

error

to

reachgood

dynamic

performance.SOitrealize

slidingmodecontrolofmotoralL-

speed

ptoiect

541

Fig3statorfluxlinkage

I州all-speedmodel(motor

moden

R。to,。quat。。。:以:霉羔(∥一y,)+,缈∥,

(2)

Ld

Statorequation:驴=“。一i。+R。

(3)

Fluxlinkageequation:少=Li,y,=缈一L口i,

(4)

Here,妒,ismotor

rotorflux

linkage’“』ismotorstator

Voltase,’R,,smotor

stator

resistance,鲁i8

rotortime

constantFromfourformulasabove.motorU—_NmodelCan

be

set

up,andismadeoftwochannels(dchannel’p

channel),itsexpressionsareinducedthat:

忆=%一(‘+吖。比

(5)

儿:晏k一%)一m%

(6)

=小(-+爿毗]

虬=‘一‘

蛐M卜,+等缸,)]

n=”,一(‘+肼,)R

审、p=莩bp—v。^+。p、。

。=*旧)一%]

,5/p=i,一‘

州=。卜,+等扣)]

ExperimentResultsandAnalysis

(3)Statorcurrantandvoltagewavetbrmswhenlowphase

switches

to

middlephase

.j|]r1一nn—f].几厂]n.『_

7\/、/\^.烈ooW

””

∽…

㈣㈨

(4)Stshn‘cHrrentandvoltagewaveformswhenmiddlephasen~itchestohighphase:

respon∞isveD'fast:itsstateswitchisqmtesmooth,andhasnotan)disturbanceandflnctuate,soitreachesthepurposeofslidingmodecoutr01whenlnotorswitchesfrom25}也to35Hzand20Hzto55}乜Inaddition.fromexperimentresults.itcanbesecnthatnlotolstatorCUl'rentlsalmostsinewaveformat

highspeed,somotorworkingstateispreferablefinally

(5)StatolCUlTentwavefofmwithU—_Nall-印eedmodelin

12Hzatlowspeed:

FromthiswovetoITn.1tcanbeseenthatmotorcallrun

stabh'lnlowfrequencybecauseofcurrentviewfinderandPIacliustolaction,statorcun'entwaveformissmoothing

obviously.hasnotquitepinnacledisturbaneeandissinewaveapproximately,soitsperformancegetmoreimprovementat

lowspeedthantha“nU—Imc,del

5.Conclusion

Atpresent、EVcontrol"systemrealizesnotonlyphase

contml(10w.middle,high,nop,anti,fivephases),butalso

steplessspeedcontrol,andobtainsgoodstatic-dynamiceffectDTCpmj∞thasdevelopedinOeFmauformorethanten

years.whosetorqueperformanceatlowspeedandhi【ghel"

harmonicoperationallimprovedparticularly,anditisappliedtoprtvductionNowDTCisappliedtohigh-powerelectric

locomotive.undeagmund,trolleyearandmaindrivesystemofEVwidelyForexample,hi曲speedtrainwhichcrosses

EnglishChanneladoptsthisconu-olsystemEAEE

staffroomofRuhrUniversityinGermanalwayskeepsaheadInthis

field,andtheycontinuetodeepenthisresearchwhichmainlyisonsuchthreeaspects:

l?Theapplicationofnon—velocitysensor

2?Theapplicationofmedium-littlepowerIGBTfrequencyconverteronall-speedISRcontrolpmioc{

3‘neapplicationofhugepowersystembythreespotsfrequencyconverterforreducingelectricnetworkhmmonicPresentlyDTCresearchisjustonemulatingandexperimentphaseinourcountry.therearcstillmanyproblemsofcontrolperformanceandapplicationwaitingtoresolvetSl

Acknowledgements

Thispaperispartiallysupportedby:ChinaHumanNSF#03JJYl012,HtmlanNSF#03JJYl012andMinistry.of

educationScienceandTechnologyFoundation#03120

References

lPekkaTiitnen.DirectTorqueContolfDTC)一theNextGeneration.TransContolsvstemsandSoftware.Mavl995

2MikaAaltonen.DirectTorqueControlofACMotorDrives.TransABBReview,Mar.1995.ppl9.24

3ZhouZude.LiuQuanStudyofDetectingImpactDamageforCompositeMaterialBasedonIntelligentSellsorJourualofW、111allUniversityofTechnologv2002,l

4LiuQuan,XuChaoSophisticatedDigitalSystemVirtualLabBasedonEmbeddedStructureProceedingsofthe8”JointInternationalComputerConfelcncc2002.1l

5ITakahashi,andT.Noguchi.”Takea100kbackupon

thepastdecadeofdirecttorqueoontrolofinducfion

motors”.Proceedingsofthe1997IndustrialElectronics

Society,MmualMeetingConference.V01.2.1997.PP546—55l

6MDepenbrook.”Directself-controlfDSC)ofinverter.

fedinductionmotor”,IEEETransonPE.3.No4.Oct

1988.PP420-429

相关主题
文本预览
相关文档 最新文档