简介:摘要鉴于传统的钻机转盘已不能满足各类新型钻井工艺要求的状况,研制了一种新型直驱转盘系统。该系统采用新研制的低速大扭矩交流变频电动机代替常规电驱动转盘的高速电动机,省去了大型减速箱这一中间传动机构,减少了中间的故障点,提高了传动效率,同时也更加方便转盘的维护与保养。
简介:Arobustslidingmodeobserverforpermanentmagnetsynchronousmotordrives,ASensorlessInitialRotorPositionEstimationSchemeforaDirectTorqueControlledInteriorPermanentMagnetSynchronousMotorDrive,Asensorlessspeedestimatorforthedirecttorquecontrolofaninteriorpermanentmagnetsynchronousmotordrive,Asensorless,stableV/fcontrolmethodforpermanent-magnetsynchronousmotordrives,Astudyonhysteresisanalysisoflinestartpermanentmagnetmotorusingpreisachmodeling,AstudyonironlossanalysismethodconsideringtheharmonicsofthefluxdensitywaveformusingironlosscurvestestedonEpsteinsamples。
简介:Acombinednumericalandanalyticalmethodforcalculatingthetorqueofanasynchronousmotorwithasolidrotor;Amathematicalmodelofanasynchronousmotorinageneralizedorthogonalsystemofcoordinates;ANEWTECHNIQUEOFTHEREPEATEDPWMCOMMANDDESTINEDTOTHEPHOTOVOLTAICPUMPINGSYSTEM;ACTIONOFTHECONDENSERCAPACITYONTHEINDICATIONSOFSINGLEPHASEASYNCHRONOUSMOTORQUALITY;Ananalysisofvibrationsofanasynchronousmotorwhenthereisadoublednumberofphasesofthepowersupplyvoltage;Aninvestigationofthemethodsofsuppressingsynchronousandasynchronousadditionaltorquesincapacitormotorsofincreasepowerandtheirautomateddesign;
简介:3-Dmagneticfieldanalysisofpermanentmagnetmotorconsideringmagnetizingdemagnetizingandeddycurrentloss;AcomparativeanalysisoffuzzylogicandPIspeedcontrolinhigh-performanceACdrivesusingexperimentalapproach;Acurrentsensorlessdrivesystemofasynchronousmotorwithalow-resolutionpositionsensor;ADesignProcedurefortheApplications-SpecificElectricMotors;Adirecttorque-controlledinteriorpermanent-magnetsynchronousmotordrivewithoutaspeedsensor;Adiscrete-timepredictivecurrentcontrolforPMSM;
简介:Asynchronousmotoroverturnwithavectorialcontrolsystem,Developmentsonbearinglessdrivetechnology,Identifyingtheasynchronousmotorinnervalues,On-lineestimationofquantitiesusingartificialneuralnetworks,Researchonflywheelenergystoragesystemforpowerquality,SIMULATIONOFAPVPANEL-INVERTERMOTOPUMPASSOCIATIONINPHOTOVOLTAICPUMPINGSYSTEMS,Simulationoffieldorientationcontrolforatwo-phaseasynchronousmotor。