workbench電機電磁場有限元分析

LowFrequencyElectromagneticAnalysisofMotorsWorkBenchEnvironmentMotorAnalysisintheWorkbenchEnvironmentUponenteringtheworkbenchenvironment,readinthedesignmodelergeometrystoredinmotor2_base.agdb.1210/1/20042MotorAnalysisintheWorkbenchEnvironmentYoushouldseeanendviewofthemotorgeometry.Usingtheleftmousebutton(LMB)clickonthebluedotadjacenttothetriadinthelowerrightcorneroftheplot.Thisshouldresultintheisometricviewshownatright.Theimagecanbedynamicallyrotatedasfollows:PositionthemousecursoronthedisplayHolddownthemiddlemousebutton(MMB)Movethemousecursor10/1/20043MotorAnalysisintheWorkbenchEnvironmentBringuptheenclosuretoolasshownatright.ThiswillbeusedtoautomaticallycreateameshofthemagneticdomainbetweenandsurroundingtheimportedgeometryNotethedetailsthatappearinthelowerleftpaneafterthisselectionismade.Wewilleditthesedefaultvalues.1210/1/20044MotorAnalysisintheWorkbenchEnvironmentClickontheindividualentriesintherighthandcolumnofthedetailspaneandeditthemasshownbelow.Enclosurenamechangedto“Air”Shape:CylinderAlignment:AutomaticCushion:8mmTarget:AllBodiesMergeParts?:Yes10/1/20045MotorAnalysisintheWorkbenchEnvironmentAftereditingthedetails,rightclickon“Air”inthetree.Inthedropdownlistthatappears,leftclickon“Generate”.Thiswillcreateacylindricalvolumeofmagneticdomaininwhichtoimmersetheimportedparts.10/1/20046MotorAnalysisintheWorkbenchEnvironmentInthetree,opentheitem“1Part,5Bodies”byclickingonthe“+”symboltotheleftofit.Dothesamewiththeitemlabeled“part”thatappearsbelowit.Notethatthesinglepartinthemodelconsistsof5individualbodies(stator,rotor,magnet1,magnet2,and“solid”).Rightclickon“solid”andinthedropdownmenu,requestthatitbehiddeninthedisplay.Notethatthedisplayofanyindividualbodiesmaybeeithersuppressedorrestoredinthismanner.1210/1/20047MotorAnalysisintheWorkbenchEnvironmentUsetheWindingToolEditortobringupthe“windingdetails”and“windingtable”panesshownintheredboxesatright.1210/1/20048MotorAnalysisintheWorkbenchEnvironmentInthewindingdetailspane,clickonthecelltotherightof“CenterPlane”,thenselectPlane6fromthetree,thenclickapply(step3atright).Thispositions/orientsthewindingssothatpredefinedplane6isthewindingmidplane.123:Click“Apply”10/1/20049MotorAnalysisintheWorkbenchEnvironmentAwindingtabletextfilecontaininginformationdescribingtherotorcoils(winding.txt)isinthelocalworkingdirectory.Readthetableasshownatright.Clickthecelltotherightof“windingTableFile”inthewindingdetailspaneandclickon“…”tobrowseforthefile.12310/1/200410MotorAnalysisintheWorkbenchEnvironmentOncethefileisreadin,makethefollowingadditionalchangesinthewindingdetailspane:FD2:SlotAngle=>22.5ClashDetection?=>YesSettingclashdetectionto“yes”willbringupanotherrowcalled“BodiesforClashDetection”inthewindingdetailspane.Clickthecelltotheright,highlight“rotor”inthetree,andclickApply.Thiswilltriggeracheckforinterferencebetweenthedefinedwindingsandtherotorstack.234:Click“Apply”110/1/200411MotorAnalysisintheWorkbenchEnvironmentAfterthewindingspecificationshavebeendefined,createthewindingbyrightclickingon“Winding”inthetreeandleftclickingon“Generate”inthedropdownlist.10/1/200412MotorAnalysisintheWorkbenchEnvironmentOnenicewaytovisualizethewindingsistorightclickonrotorinthetreeandchoose“HideAllOtherBodies”inthedropdownlist.Then,inthetree,clickonanyofthe6individualcoilscomprisingthewinding(A.1,A.2,B.1,B.2,C.1,C.2).Forexample,thelocationofcoilA.1isshownbelow.23110/1/200413MotorAnalysisintheWorkbenchEnvironmentNowclickontheProjecttabandchoose“NewSimulation”2110/1/200414MotorAnalysisintheWorkbenchEnvironmentOncethegeometryissuccessfullyattachedinDesignSimulation,definethecurrentandphaseanglesforconductorsA,B,andCasshownatright: ConductorA:55A0 ConductorB:55A120 ConductorC:55A2402110/1/200415MotorAnalysisintheWorkbenchEnvironmentPreparetodefinemagneticfluxparallelboundariesontheexteriorofthemodeleddomainasshownatright.2110/1/200416MotorAnalysisintheWorkbenchEnvironmentInordertomoreeasilyselecttheexternalsurfacesofthemodeleddomain,suppressallbodiesexcept“Solid”.Forexample,suppressionofthestatorbodyisillustratedatright.Rightclickoneachbodytobesuppressedtobringupthedropdownmenu.Whenyouaredone,onlythe“Solid”bodyshouldremainunsuppressed(havea“”adjacenttoitratherthanan“x”).2110/1/200417MotorAnalysisintheWorkbenchEnvironmentTodefinefluxparallelsurfaces,select“MagneticFluxParallel”fromthetreeandclickonthecelladjacentto“Geometry”inthemagneticfluxdetailspane.Positionthemousecursoronanyofthesurfacesboundingthecylindricalvolumeandclickwiththeleftmousebutton.Afterselectingthefirstsurface,holddownthecontrolbuttonandselectanother.Ifnecessary,releasetheCtrlbutton,usetheMMBtoreorientthemodelasneeded,andselectthethird(andfinal)surface.Click“Apply”inthemagneticfluxparalleldetailspane.2143:SelectexternalsurfacesofcylinderusingCtrl+LMB10/1/200418MotorAnalysisintheWorkbenchEnvironmentRightclickonanyofthebodiesinthetreeandselect“UnsuppressAllBodies”.Select“Rotor”fromthetreeandinthedetailspane,clickonthearrowinthecelltotherightof“Material”.Fromthedropdownlist,choose“Import”.21310/1/200419MotorAnalysisintheWorkbenchEnvironmentMaketheselectionsshowninthe“ImportMaterialData”dialogueboxasshownatright.ThiswillsimultaneouslyimporttheBHcurveforM14steelintothedatabaseandassignthispropertytotherotorbody.YoumayviewtheBHdata(tableandxyplot)byclickingonthearrowinthecelltotherightof“Material”inthedetailspaneandselecting“EditM14Steel”inthedropdownlist(seenextslide).2134:Select“EditM14Steel”fromthedropdownlist10/1/200420MotorAnalysisintheWorkbenchEnvironmentClickonthethumbnailsketchintherighthandpanetodisplaythexyplotshownatright.ClickontheSimulationtabtoreturntothemodel.310/1/200421MotorAnalysisintheWorkbenchEnvironmentClickon“Stator”inthetree.IntheStatordetailspane,clickonthearrowinthecelltotherightof“Material”andchoose“M14Steel”(thismaterialpropertyisnowanactivepartofthedatabase)fromthedropdownlist.31210/1/200422MotorAnalysisintheWorkbenchEnvironmentInitiatethecreationofanewmaterialpropertyforbody“Magnet1”asshownatright.31210/1/200423MotorAnalysisintheWorkbenchEnvironmentClickon“Add/RemoveProperties”intheElectromagneticssection.Inthe“AddorRemoveProperties”dialoguebox,choose“LinearHardMagneticMaterial”.31210/1/200424MotorAnalysisintheWorkbenchEnvironmentDefinethecoercivityandremanantmagnetization:Hc=750000A/mBr=0.6TItmayalsobenecessarytosupplya“dummy”valueforYoung’sModulustoworkaroundunnecessaryerrortrapping.Rightclickon“NewMaterial”,select“Rename”fromthedropdownlist,andchangethenameofthenewmaterialto“PM”.124310/1/200425MotorAnalysisintheWorkbenchEnvironmentClickontheDesignSimulationtab.Clickonthe“Magnet2”bodyinthetree.Clickonthearrowinthecelltotherightof“Material”inthemagnet2detailspaneandchoose“PM”WehavenowassignedPMpropertiestobothmagnetsbuthaveyettodefinetheirpolarity.Theywillberadiallypoled.Theuppermagnet(Magnet1)willbepoledradiallyoutward(“+x”inacylindricalcoordinatesystem)whilethelowerPMwillbepoledradiallyinward(“-x”incylindricalcoordinates).124310/1/200426MotorAnalysisintheWorkbenchEnvironmentInitiatethecreationofacylindricalcoordinatesystem.Clickon“Model”inthetree.Choose“Insert”fromthefirstdropdownlist.Choose“CoordinateSystem”fromtheseconddropdownlist.12310/1/200427MotorAnalysisintheWorkbenchEnvironmentClickon“CoordinateSystems”inthetree.Note:makenoattempttomodifypredefined“GlobalCoordinateSystem”.Clickon“Insert”and“CoordinateSystems”inthecascadingdropdownlistsasshownatright.12310/1/200428MotorAnalysisintheWorkbenchEnvironmentRightclickon“CoordinateSystem”inthetreeandchoose“Rename”fromthedropdownlist.Renamethecoordinatesystemasdesired(forexample,“PM_CSYS”,asshownatright).Clickonthecelltotherightof“Type”inthePM_CSYSdetailspaneandchangetoCylindrical.12310/1/200429MotorAnalysisintheWorkbenchEnvironmentSelect“Magnet1”inthetreeandassigntoitthe“PM_CSYS”coordinatesystemwith“+x”polarizationinthemagnet1detailspane.Dothesamefor“Magnet2”exceptsetthepolarityinthe“–x”direction.341210/1/200430MotorAnalysisintheWorkbenchEnvironmentSelect“Mesh”fromthetree.Inthemeshdetailspane,establishthefollowingsettings:GlobalControl=>AdvancedCurve/Proximity=>40GapDistance:7e-4m213410/1/200431MotorAnalysisintheWorkbenchEnvironmentRequesttheautomaticdetectionofsurfaceswithin7e-4m.Thiswillallowfurtherspecificationstobemadeonsurfacesfoundtobewithinthistolerance(nextslide).2110/1/200432MotorAnalysisintheWorkbenchEnvironmentInthetree,selectallsurfacepairshavingaproximityof7e-4m(click“GapSizing”thenholddowntheshiftkeyandselect“GapSizing6”).SettheGapAspectRatiointhedetailspaneto3.2110/1/200433MotorAnalysisintheWorkbenchEnvironmentCreatethemesh2110/1/200434MotorAnalysisintheWorkbenchEnvironmentIfyouwishtoviewthemeshofanindividualbody,selectit(rightmousebutton)inthetree,clickon“HideAllOtherBodies”inthedropdownlist,andclickon“Mesh”inthetree.Therotormeshisshownbelow.21310/1/200435MotorAnalysisintheWorkbenchEnvironmentAddarequestforcalculatedvaluesof“TotalFluxDensity”onallbodies(thedefault).2110/1/200436MotorAnalysisintheWorkbenchEnvironmentAddarequestforcalculatedvaluesof“DirectionalForce/Torque”.2110/1/200437MotorAnalysisintheWorkbenchEnvironmentSet“Orientation”inthedetailspaneto“ZAxis”(i.e.,calculatetorqueabouttheglobalzaxis).Clickonthecelltotherightof“Geometry”inthedetailspaneandleftclickinthevicinityoftherotorcentroid.Youwillseeanumberof“sheets”appearinthedisplay.Leftclickontheseoneatatimeuntilyoufindtheoneassociatedwiththerotor(therotorwillbehighlightedingreenasshownatright).Click“Apply”asshown.Therotorshouldbedisplayedinadarkbluecolor.213:Clickaroundhere4:Cyclethrough“sheets”untiltherotorishighlightedingreen5:ClickApply10/1/200438MotorAnalysisintheWorkbenchEnvironmentWehavespecifiednonlinearBHdatafortherotorandstatorbutwillsuppressitsusagesothatthesolutioncanbeobtainedexpediently.Choose“Rotor”inthetreeandset“NonlinearMaterialEffects”to“No”intherotordetailspane.Dothesameforthestator(shownatright).1210/1/200439MotorAnalysisintheWorkbenchEnvironmentExecutethelinearsolutionasshownatright.