Electric Motors and Drives.pdf

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1、ElectricMotorsandDrivesThisPageIntentionallyLeftBlankElectricMotorsandDrivesFundamentals,TypesandApplicationsThirdeditionAustinHughesSeniorFellow,SchoolofElectronicandElectricalEngineering,UniversityofLeedsAMSTERDAM•BOSTON•HEIDELBERG•LONDON•NEWYORK•OXFORDPARIS•SANDIEGO•SANFRANC

2、ISCO•SINGAPORE•SYDNEY•TOKYONewnesisanimprintofElsevierNewnesisanimprintofElsevierLinacreHouse,JordanHill,OxfordOX28DP30CorporateDrive,Suite400,Burlington,MA01803Firstedition1990Secondedition1993Thirdedition2006Copyrightß1990,1993,2006,AustinHughes.PublishedbyElsevierLtd.Allrightsre

3、servedTherightofAustinHughestobeidentifiedastheauthorofthisworkhasbeenassertedinaccordancewiththeCopyright,DesignsandPatentsAct1988.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmittedinanyformorbyanymeanselectronic,mechanical,photocopying,recordingorotherwi

4、sewithoutthepriorwrittenpermissionofthepublisherPermissionsmaybesoughtdirectlyfromElsevier’sScience&TechnologyRightsDepartmentinOxford,UK:phone(+44)(0)1865843830;fax(+44)(0)1865853333;email:permissions@else-vier.com.AlternativelyyoucansubmityourrequestonlinebyvisitingtheElsevierweb

5、siteathttp://elsevier.com/locate/permissions,andselectingObtainingpermissiontouseElseviermaterialBritishLibraryCataloguinginPublicationDataAcataloguerecordforthisbookisavailablefromtheBritishLibraryLibraryofCongressCataloguinginPublicationDataAcataloguerecordforthisbookisavailablef

6、romtheLibraryofCongressISBN-13:978-0-7506-4718-2ISBN-10:0-7506-4718-3ForinformationonallNewnespublicationsvisitourwebsiteathttp://books.elsevier.com/PrintedandboundinGreatBritain060708091010987654321CONTENTSPrefacexvi1ELECTRICMOTORS1Introduction1ProducingRotation2Magneticfieldandma

7、gneticflux3Magneticfluxdensity4Forceonaconductor6MagneticCircuits7Magnetomotiveforce(MMF)9Electriccircuitanalogy10Theair-gap11Reluctanceandair-gapfluxdensities12Saturation14Magneticcircuitsinmotors15TorqueProduction16Magnitudeoftorque18Thebeautyofslotting19SpecificLoadingsandSpecif

8、icOutput21Specificloadings