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1、华中科技大学博士学位论文永磁同步直线电机磁阻力分析及控制策略研究姓名：张颖申请学位级别：博士专业：机械电子工程指导教师：陈幼平;周祖德20080510华中科技大学博士学位论文AbstractTheelectricalenergycanbetransferredintolinearmotionbypermanentmagneticsynchronouslinearmotors(PMSLMs),andallintermediatetransmissionmechanismcanbecanceled.Therefore,thefeedingsystemcandriveloaddire
2、ctly,andrealizemanufacturingprocedurewithhighspeedandhighprecision.Consequently,PMSLMisbecomingtheprincipalfunctiondeviceofsuper-qualityNCmachines,andhasextensiveapplicationperspectivesinNCsystemswithhighspeedandhighprecision，ICmanufactureandpackingdevices,lithographictools，andsoon.However,i
3、nthePMSLMs,thereexiststhrustripplecausedbytheloaddisturbance,thedetentforcegeneratedbyend-effectandslot-effect,andtheperturbationofsystemparameters,whichhasnegativeeffectonthepositioningaccuracyandthesteadinessatlowspeed,andthenbecomesoneofsignificantcausesinterferingwiththewidelyuseofthePMS
4、LMsinindustrialpractice.ThispaperfocusedonhowtoweakenthenegativeeffectofthrustrippleontheperformanceofthePMSLMs,andanalyzedtheoccurrencereasonsandthecalculationmethodsofthrustripple,andproposedthecorrespondingconstructivedesignmethodstoreducedetentforceandthecontrolstrategytorestraintthrustf
5、ipple,andperformedexperimentstoverifythevalidityoftheproposedmethodsabove.Firstly,thedetentforcethatisthemainreasonofthrustripplewasanalyzedbythemotordesignmethods.TheanalysismodelofthemagneticfieldinthePMSLMwasbuiltbymeansofequivalentmagnetizingcurrentandSchwarz-Christoffeltransformation,an
6、dthedetentforcewasanalyzedbyMaxwellstress.Theanalysisresultsshowedthatthedetentforcecouldbedividedintotheendforcecausedbyend-effectandthecoggingforcecausedbyslot-effect,andthenthefiniteelementmodelsweresetuptocalculatetheendforceandthecoggingforcerespectively,astheresult,thecorrespondingcons
7、tructivedesignmethodswereproposed.Secondly,thevectorcontroltheory，thekinematicsmodelandthesinusoidalspacevectorPulse-Width-Modulation(SVPWM)controltechnologywereanalyzeddividually,andthenthemathematicsimulationmodeloftheservosystemofPMSLMwasbuilt.S
