无刷直流电动机调速算法及起动电路研究

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1、AbstractAbstractInrecentDCmotorhasbeenmoreisanelectronicyears，brushlesswidelyused,itexchangetoreplacethemechanicalcommutation,thereisnomechanicalcommutatorandcarbonbrushes，brushDCmotortoovercomeshortlife，noiselowefficiency,andreducedmotorwear,andtheunreliabilityofcarbonbrushandcommutat

2、orcontactelectromagneticacoustic,thestudyofourbrushlessDCmotorhasaveryimportantproductionandlifemeaning．Generally,itrequiresinstallingpositionsensorforreal·timedetectingofpositionsignalbacktothecontrollerinordertoachievetheeffectofspeedcontr01．However,consideringthemotorapplications，th

3、esize，thecostandmanyotherissues,IfcannotusepositionselISOrstoachievethesamepurpose—driven，itwillbemorecost—effective．SoSensodesscontrolingmethodhasbeenproposed．itsstartingcircuithasbeenandresearchedinthesis．analyzedIntheintroductionOverviewofBLDCMspeedcontrolandsection，DevelopmentSenso

4、rlesscontrolsystemofBLDCMbereviewed．Thestudyisdividedintotwopartsfirstpart(Chapter2andChapter3)isfuzzycontrolofbmshlessDCmotorspeedcontrolsystem，thesecondpan(Chapter4Chapter5)isthestartingcircuitofsensoflessBLDCM，IsthefocusofthecontentofpapersThefirstpartofthisarticlereviewsthebmshless

5、DCmotorstructure，workingprincipleandmathematicalmodel，ThenthespeedoftheBLDCMmethodsareanalyzed．ForanumberofshortcomingsofTraditionalPIDcontrol，FuzzyadaptivePIDcontrolmethodhasbeenproposed，SimulationresultsshowthatSystemhasafasterresponsetime，noovershoot，andsteady—stateaccuracy．Basedont

6、heSensorlessBLDCMthebasicoperatingprinciple．StartingmethodofBEMFdetectionrotorpositionhasbeenproposed．PiecewiselinearmethodwasusedtoachievetheBEMFdetectioncircuit，FortheproblemofexcessivecurrentcausedbyThree—stepstarting，Currentclosed—loopstartingmethodhasbeenintroduced．Throughitsanaly

7、sis，ThesimulationresultsforthecurrentclosedloopstartingandthesteadyrunningindicatetheproposedmeasuresolvestheproblemofthebiggercurrentwhennAbstractstarting．Keywolds：bmshlessDCmotor，BEMF，three—step，ClosedloopstartingIII目录目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．IAbstract．．．．．．．．．．．．．．．．．．．．．．．．．．．．．