资源描述：
《electrical machines and drives systems电机和驱动器系统英文原版电气工程教材教程》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、ElectricalMachinesAndDrivesSystems电机和驱动器系统英文原版电气工程教材教程1Introductionandreviewofbasictheory1.1AimofthebookOnenteringtheworldofelectricalmachines,thestudentmeetsmanyconceptualdifficultiesnotexperiencedforexampleintheearlystudiesofdigitalsystems,withtheirsimplea
2、ndprecise2-stateoperation.Moreassistanceisrequiredtopermitthenew-comertogainconfidenceindealingwithnon-linear,3-dimensional,rotatingelectromagneticdevices.Thepurposeofthisbookistoprovidethisaidtounderstandingbyshowinghow,withalimitednumberofequationsderivedf
3、rombasicconsiderationsofpowerflowandelementarycircuitandelectromagnetictheory,theelectromechanicalperformancecanbeexplainedandpre-dictedwithreasonableaccuracy.Suchanaim,whichwillpermitthecalculationofpower-input/outputcharacteristicsalmostcloseenoughinengine
4、eringtermstothoseofthedeviceitself,canbeachievedbyrepresentingthemachineasasimpleelectricalcircuit-theequivalent-circuitmodel.Thisconceptisexplainedinmanybooks,forexampleintheauthor’scompanionvolumeElectricalMachinesandTheirApplications.Thoughmoredetailedthe
5、oreticaltreat-mentisgiventhere,substantialportionsofthepresenttextmayberegardedassuitablerevisionmaterial.Thisexpanded3rdeditioncan,asawhole,beconsideredasatextbookwithparticular,butnotexclusive,emphasisonElectricalDrives,taughtthroughworkedexamples,foraread
6、erhavingsomefamiliaritywithbasicmachinetheory.Perhapsitisappropriatetopointoutthatcompleteandexactanalysisofmachineperformanceissocomplexastobevirtuallyimpossible.Theadditionalaccuracyachievedbyattemptstoapproachsuchmethodsisprimarilyofinteresttothespecialis
7、tdesignerwhomustensurethathis2ElectricalMachinesandDriveSystems(1.1)productwillmeettheuser’sneedswithoutbreakdownandhemustjudgewhentheanalyticalcomplicationisjustified.Fortheuser,andfortheengineeringstudentwhoisnotyetaspecialist,thesimplermethodsareadequatef
8、orgeneralunderstandingandprovidealead-inifnecessaryforlaterspecialisation.Therearemanyfeaturesofallmachinetypeswhicharecommon,theobviousexamplebeingthemechanicalshaftequations.Butapartfromthesea
