机电一体化专业英语 黄星 夏玉波 Unit 9.ppt

IntroductiontoMotorsPartITechnicalandPracticalReadingPassageATheMotorBasics(I),themotorisalsoclassifiedasanelectromechanicaldevice/-poletoS-pole.icfieldandcurrentflowsintheconductor,"icforce"(-1).Thefleming'slefthandruledeterminesthedirectionofthecurrent,,-2.icflux,.Whenthecurrentflowsintheconductortowardthereader,Wdirectionwillbeproducedaroundthecurrentflowbytheright-handedscrewrule(-3).sinterfereeachother(-4).icforcedistributedinthesamedirectionactstoincreaseitsstrength,.Thus,icforceisstrongertowhereitisweaker(-5).icforceisobtainedfromtheequation;-6illustratesthetorqueobtainedwhenasingle-icfiled.Thetorqueproducedbythesingleconductorisobtainedfromtheequation;●T'(torque)●F(force)●R(distancefromthecentertoconductor)Here,therearetwoconductorspresent;,icfieldwillbecreated(-7).-polarityat①andS-polarityat②and③.Then,icattractionandrepulsion(-8).(-9).,thecurrentdirectionshouldbechangedsothattheN-polaritystaysatupperportionandS-polaritystaysatunderportionofthearmature(-10).,mutator)shapedasacylinderdividedintothree(-11).,applyplus(+)voltagetotheleftandminus(-),applyminus(-)voltagetotheleftandplus(+)totherightbrush,(-12).Notes1、izationtohaveN-polarityat①andS-polarityat②and③.全句为祈使句;Place和conduct为并列结构。全句译为:在磁场的平行方向置入电枢,同时产生了磁化现象,①处是N极、②和③处是S极。2、