带式输送机及其牵引系统的外文翻译、中英文翻译、外文文献翻译

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1、第11页外文原文：JOURNALOFCOALSCIENCE&ENGINEERING(CHINA)ISSN1006-9097pp83-87Vo1.10No.lJune200.1DevelopmentofbeltconveyordrivingsystemFUJun-qing(付峻青)，WANGCong(王聪)，HUOWei(霍伟)(DepartmentofInformationandElectricalEngineering,ChinaUniversityofMining&TechnologyIBei,jing)Beijing100083,China)Abst

2、ractAshortreviewfortheexistingvariousdrivingmethodsforbeltconveyorwasgiven,whichincludetheanalysisandcomparisonabouttheadvantages,disadvantagesandsuitableapplicationrangeofthesemethods.Basedonthisthevariable-frequency-control(VFC}methodforbeltconveyordrivewasfullydiscussedwithfocu

3、sonitsapplicationinmedium-highvoltagerange.TheprincipleofNeutralPointClamped(NPC)Three一LevelInverterusinghigh-voltageIGBTstogetherwiththecontrolstrategyofrotorfield-orientedvectorcontrolforinductionmotordrivewereillustrated.Keywordsbeltconveyordrivingsystem,variable-frequency-cont

4、rol,three-levelinverterAmongthemethodsofmaterialconveyingemployed，beltconveyorsplayaveryimportantpartinthereliablecarryingofmaterialoverlongdistancesatcompetitivecost．Conveyorsystemshavebecomelargerandmorecomplexanddrivesystemshavealsobeengoingthroughaprocessofevolutionandwillcont

5、inuetodoso．Nowadays，biggerbeltsrequiremorepowerandhavebroughttheneedforlargerindividualdrivesaswellasmultipledrivessuchas3drivesof750kWforonebelt(thisisthecasefortheconveyordrivesinChengzhuangMine)．Theabilitytocontroldriveaccelerationtorqueiscriticaltobeltconveyors’performance．Ane

6、fficientdrivesystemshouldbeabletoprovidesmooth，softstartswhilemaintainingbelttensionswithinthespecifiedsafelimits．Forloadsharingonmultipledrives．torqueandspeedcontrolarealsoimportantconsiderationsinthedrivesystem’sdesign.Duetotheadvancesinconveyordrivecontroltechnology，atpresentma

7、nymorereliable．Cost-effectiveandperformance-drivenconveyordrivesystemscoveringawiderangeofpowerareavailableforcustomers’choices[1].1Analysisonconveyordrivetechnologies1．1DirectdrivesFull-voltagestarters．Withafull-voltagestarterdesign，theconveyorheadshaftisdirect-coupledtothemotort

8、hroughthegeardrive．Directfull-vol