减速机电动滚筒振动源电动机新型产品规划与开发.docx
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减速机电动滚筒振动源电动机新型产品规划与开发
Efficiencytrendsinelectricmachinesanddrives
EnergyPolicy
AlmostallelectricityintheUKisgeneratedbyrotatingelectricalgenerators,andapproximatelyhalfofitisusedtodriveelectricalmotors.Thismeansthatefficiencyimprovementstoelectricalmachinescanhaveaverylargeimpactonenergyconsumption.Thekeychallengestoincreasedefficiencyinsystemsdrivenbyelectricalmachineslieinthreeareas:
toextendtheapplicationofvariable-speedelectricdrivesintonewareasthroughreductionofpowerelectronicandcontrolcosts;tointegratethedriveandthedrivenloadtomaximisesystemefficiency;andtoincreasetheefficiencyoftheelectricaldriveitself.Intheshorttomediumterm,efficiencygainswithinelectricalmachineswillresultfromthedevelopmentofnewmaterialsandconstructiontechniques.Approximatelyaquarterofnewelectricalmachinesaredrivenbyvariable-speeddrives.Thesearealessmatureproductthanelectricalmachinesandshouldseelargerefficiencygainsoverthenext50years.Advanceswilloccur,withnewtypesofpowerelectronicdevicesthatreduceswitchingandconductionloss.Withvariable-speeddrives,thereiscompletefreedomtovarythespeedofthedrivenload.Replacingfixed-speedmachineswithvariable-speeddrivesforahighproportionofindustrialloadscouldmeana15–30%energysaving.ThiscouldsavetheUK15 billion kWhofelectricityperyearwhich,whencombinedwithmotoranddriveefficiencygains,wouldamounttoatotalannualsavingof24 billion kWh.
ArticleOutline
1.Introduction
2.Energyconsumption
3.Currentstateoftheart
3.1.Generation
3.2.Electricmotors
3.3.Powerelectronicconverters
3.4.Variable-speeddrives
3.5.Completesystem
3.5.1.Industrial
3.5.2.Household
3.5.3.Transport
3.6.Marketbarriers
4.Futureadvancesto2050andbeyond
4.1.Keychallenges
4.1.1.Extensionofapplicationareas
4.1.2.Integratedsystemdesign
4.1.3.Driveefficiency
4.2.Keyengineeringandscientificadvances
4.2.1.Electricalmachines
4.2.2.Powerelectronicsandcontrol
4.2.3.Integratedsystems
5.Conclusions
References
Designandimplementationofanovelhybrid-electric-motorcycletransmission
AppliedEnergy
ThishybridpowersystemincorporatesamechanicaltyperubberV-belt,continuously-variabletransmission(CVT)andchaindrivestocombinepowerofthetwopowersources,agasolineengineandanelectricmotor.Thesystemusesfourdifferentmodesinordertomaximizetheperformanceandreduceemissions:
electric-motormode;enginemode;engine/chargingmode;andpowermode.Themainadvantagesofthisnewtransmissionincludetheuseofonlyoneelectricmotor/generatorandtheshiftoftheoperatingmodeaccomplishedbythemechanical-typeclutchesforeasycontrolandlowcost.Kinematicanalysesanddesignareachievedtoobtainthesizeofeachcomponentofthissystem.Adesignexampleisfabricatedandtested.
ArticleOutline
1.Introduction
2.Parallelhybridtransmission
3.Kinematicanalysisanddesign
3.1.Speedratioofthechaindriveandfinaldrive
3.2.SpeedratiooftheCVT
3.3.Thespeedratioofthehybrid-powersystem
4.Designexamples
4.1.Prototypedevelopment
4.2.Testandexperimentalresults
5.Conclusions
Acknowledgements
References
Anovelpowersplittingdrivetrainforvariablespeedwindpowergenerators
RenewableEnergy
Inthispaperanovelelectricallycontrolledpowersplittingdrivetrainforvariablespeedwindturbinesispresented.Avariablespeedwindturbinehasmanyadvantages,mainlyitcanincreasethepoweryieldfromthewind,alleviatetheloadpeakintheelectrical-mechanicaldrivetrain,andpossesalonglifetime,also,itcanofferthepossibilitytostorethebrieflytimelywind-conditionedpowerfluctuationsinthewindrotor,inwhichtherotarymassesareusedasstoragesofkineticenergy,consequently,thevariablespeedwindturbinesareutilizedinthewindpowerindustrywidely.Inthiswork,onthebasisofaplanetarytransmissionanewkindofdrivetrainforthevariablespeedwindturbinesisproposed.Thenewdrivetrainconsistsofwindrotor,three-shaftedplanetarygearset,generatorandservomotor.Thewindrotoriscoupledwiththeplanetcarrieroftheplanetarytransmission,thegeneratorisconnectedwiththeringgearthroughanadjustmentgearpair,andtheservomotorisfixedtothesungear.Bycontrollingtheelectromagnetictorqueorspeedoftheservomotor,thevariablespeedoperationofthewindrotorandtheconstantspeedoperationofthegeneratorarerealized,therefore,thegeneratorcanbecoupledwiththegriddirectly.Atthenominaloperationpoint,about80%oftherotorpowerflowthroughthegeneratordirectlyand20%throughtheservomotorandasmallpowerelectronicssystemintothegrid.Asaresult,thedisadvantagesinthetraditionalwindturbines,e.g.highpriceofpowerelectronicssystem,muchpowerloss,strongreactionfromthegridandlargecrashloadinthedrivetrainwillbeavoided.
ArticleOutline
1.Introduction
2.Configurationofthenovelvariablespeeddrivetrain
3.Variablespeedoperation
4.Powersplittingperformance
5.Transmissionefficiency
6.Operationrange
7.Conclusion
References
Fromtransmissionerrormeasurementtopulley–beltslipdeterminationinserpentinebeltdrives:
Influenceoftensionerandbeltcharacteristics
MechanismandMachineTheory
Serpentinebeltdrivesareoftenusedinfrontendaccessorydriveofautomotiveengine.Theaccessoriesresistanttorquesaregettinghigherwithinnewtechnologicalinnovationsasstater-alternator,andbelttransmissionsarealwaysaskedforhighercapacity.Twokindoftensionersareusedtomaintainminimumtensionthatinsurepowertransmissionandminimizeslip:
dryfrictionorhydraulictensioners.Anexperimentaldeviceandaspecifictransmissionerrormeasurementmethodhavebeenusedtoevaluatetheperformancesofagenerictransmissionbydeterminingthepulley–beltslipforthesetwokindsoftensioner.Transmissionerrorbetweenpulleys,pulley/beltsliparededucedfrompulleyrotationanglemeasurements.Resultsobtainedshowthat:
theuseoftensionerlimitsbeltsliponpulleys,pulley–beltslipisreachablefromtransmissionerrormeasurement,beltnonuniformcharacteristicsareresponsibleoflowfrequencymodulationsoftransmissionerror.
ArticleOutline
1.Introduction
2.Experimentalsetup
2.1.Beltdrivedescription
2.2.Measurementdevices
3.Pulley–beltslipanalysis
3.1.Fromtransmissionerrortosliprate
3.2.Results
3.3.Transmissionerrorrelatedtononuniformbeltcharacteristics
4.Conclusion
References
Acompact,highefficiencycontra-rotatinggeneratorsuitableforwindturbinesintheurbanenvironment
RenewableEnergy
Thispaperisconcernedwiththedesign,developmentandperformancetestingofapermanentmagnet(PM)generatorforwindturbineapplicationsinurbanareas.Theradiallyinteractingarmaturewindingsandmagnetarrayarecarriedondirectdrive,contra-rotatingrotors,resultinginahightorquedensityandefficiency.Thistopologyalsoprovidesimprovedphysicalandmechanicalcharacteristicssuchascompactness,lowstartingtorque,eliminationofgearboxes,lowmaintenance,lownoiseandvibration,andthepotentialformodularconstruction.Thedesignbriefrequireda50 kWcontinuousratedprototypegenerator,witharelativespeedattheair-gapof500 rpm.Atestrighasbeeninstrumentedtogivemeasurementsofthemechanicalinput(torqueandspeed)andelectricaloutput(voltage,currentandpower)ofthegenerator,aswellastemperaturereadingsfrominsidethegeneratorusingawirelesstelemetrydevice.Peakpoweroutputwasfoundtobe48 kWatacontra-rotatingspeedof500 rpm,closetothedesigntarget,withanefficiencyof94%.Itisanticipatedthatthegeneratorwillfindapplicationinawiderangeofwindturbinedesignssuitedtotheurbanenvironment,e.g.typessitedonthetopofbuildings,asthereisgrowinginterestinprovidingquiet,lowcost,cleanelectricityatpointofuse.
ArticleOutline
1.Introduction
2.Designandmanufactureconsiderations
3.Testfacilityconstruction
4.Generatorperformanceresults
5.Conclusions
References
电动滚筒
电机和减速器
新型
驱动装置
固定式和移动式
带式输送机
结构紧凑、传动效率高、噪声低、使用寿命长,运转平稳、工作可靠、密封性好、占据空间小、安装方便、维护简单
恶劣环境条件
潮湿、泥泞、粉尘、高温
工作环境
皮带运输机和提升设备
动力
矿山、冶金、化工、煤炭、建材、电力、粮食及交通运输
Electricdrum
Motorandreducer
New
Drive
Fixedandmobile
BeltConveyor
Compact,hightransmissionefficiency,lownoise,longlife,smoothoperation,reliablesealing,smallfootprint,easyinstallation,simplemaintenance
Adverseenvironmentalconditions
Wet,muddy,dust,hightemperature
Workenvironment
Beltconveyorandliftingequipment
Power
Mining,metallurgical,chemical,coal,buildingmaterials,electricity,foodandtransport
1,440articlesfoundfor:
pub-date>1989andtak(((Electricdrum)orDriveor(Motorandreducer)or(Beltconveyor)or(liftingequipment)or(Workenvironment))and(Newor(Fixedandmobile)orCompactor(hightransmissionefficiency)or(lownoise)or(longlife)or(smoothoperation)or(reliablesealing)or(smallfootprint)or(easyinstallation)or(simplemaintenance))and((Adverseenvironmentalconditions)orWetormuddyordustor(hightemperature)orPowerorMiningormetallurgicalorchemicalorcoalor(buildingmaterials)orelectricityorfoodortransport))
DesigningDryersUsingHeatandMassExchangeNetworks:
AnApplicationtoConveyorBeltDryers
ChemicalEngineeringResearchandDesign
Classical1-Dnumericalsimulationsofdryersinvolvethesolutionofnonlineardifferentialrelationswhichincludebal