無(wú)刷直流電機(jī)控制關(guān)鍵技術(shù)研究及其在汽車(chē)電傳動(dòng)系統(tǒng)中的應(yīng)用.pdf

1、同濟(jì)大學(xué)交通運(yùn)輸學(xué)院博士學(xué)位論文無(wú)刷直流電機(jī)控制關(guān)鍵技術(shù)研究及其在汽車(chē)電傳動(dòng)系統(tǒng)中的應(yīng)用姓名：毛明平申請(qǐng)學(xué)位級(jí)別：博士專(zhuān)業(yè)：載運(yùn)工具運(yùn)用工程指導(dǎo)教師：劉友梅陶生桂20050601ABS。J’RAC’lABSTRACTThepermanentmagnetbrushlessDCmotor(BLDC)pocessestheadvantagesofhighefficiencyhighpowerdensityandtorque／weightrat

2、ioandofsmallrotatinginertiaetc。ThesefeaturesverywellsatisfythetoughdemandraisedbyvehicleapplicationForthesereasonsgainedBLDCmoreandmorepopularityinrecentyears。Thisdissertationcenterscloselyaroundkeyproblemsarsingfromrese

3、archanddevelopmentofBLDCcontrolsystemanditsapplicationreleventtopicsVarioursexperimentshavebeenconductedandtheoriticalexplanationhasbeenforwardedBasedonthephysicalphenomenaofvoltagevariationcausedbyinvertercommutation，an

4、ovellinvertersimulationmodelhasbeenbroughtforwardusingtheconceptofswitchingfunctionTogetherwiththismodel，acompletesimulationmodelofthewholeBLDCcontrollsystemhasbeenpresentedinthisdissertationInordertesearchtheproblemofto

5、rqueripplewhichrestrainstheapplicationofBLDC，thedynamicmodellingoftheBLDCduringcurrentcommutaionhasbeenlookedinto，acompletedynamicmodelincludingcommutingphasecurrentsanduncommutingphasecurrenthasbeenestablishedasaresultT

6、herelationbetweenmotorspeedandcommutationtorqueripplehasbeenderivedTheoptimalcommutaiontiminginthesenseoftorquerippleminimizationhasbeeninvestigatedwhichyieldsastrategyofapplyingPWMonthefasterchangingphaseduringcommutati

7、onTheoriticalresultshaveprovedthatbyapplyingthisstrategythefasterchangingphasecurrentcanbeoppressedwhichresultsinthesanlerateofchangeofthephasecurrentineachcommutingphaseThisCangreatlyreducethetorquerippleQuantitiveanaly

8、sishasbeenconductedinordertodeterminethePWMdutyratioTheresultshavebeenpresentedinbothhighandJOWspeedareaSimulationhasbeenconductedtoverifythetheoriticalresultsThrumeasuringthevoltagebetweentheneutralpointofaresisternetwo

9、rkparalleltothemotorstatorcircuitandtheneutralpointoftheinverterDClink，the3一harmonicoftheBEMFhasbeenindirectlyderived，whichinturnprovidesinformationoftherotorpositionTheinflunceofthePWMmodulationandcommutationoverthe3rdh