workbench电机电磁场有限元分析

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1、9.0 New FeaturesLow Frequency Electromagnetic Analysis of MotorsWork Bench EnvironmentWorkshopANSYS v9.02021/6/162Motor Analysis in the Workbench EnvironmentUpon entering the workbench environment, read in the design modeler geometry stored in motor2_base.agdb.12WorkshopANSYS v9.02021/6/163Motor Ana

2、lysis in the Workbench EnvironmentYou should see an end view of the motor geometry. Using the left mouse button (LMB) click on the blue dot adjacent to the triad in the lower right corner of the plot. This should result in the isometric view shown at right.The image can be dynamically rotated as fol

3、lows:Position the mouse cursor on the displayHold down the middle mouse button (MMB)1) Move the mouse cursorWorkshopANSYS v9.02021/6/164Motor Analysis in the Workbench EnvironmentBring up the enclosure tool as shown at right. This will be used to automatically create a mesh of the magnetic domain be

4、tween and surrounding the imported geometry Note the details that appear in the lower left pane after this selection is made. We will edit these default values.12WorkshopANSYS v9.02021/6/165Motor Analysis in the Workbench EnvironmentClick on the individual entries in the right hand column of the det

5、ails pane and edit them as shown below.Enclosure name changed to “Air”Shape: CylinderAlignment: AutomaticCushion: 8 mmTarget: All BodiesMerge Parts?: YesWorkshopANSYS v9.02021/6/166Motor Analysis in the Workbench EnvironmentAfter editing the details, right click on “Air” in the tree. In the drop dow

6、n list that appears, left click on “Generate”. This will create a cylindrical volume of magnetic domain in which to immerse the imported parts. WorkshopANSYS v9.02021/6/167Motor Analysis in the Workbench EnvironmentIn the tree, open the item “1 Part, 5 Bodies” by clicking on the “+” symbol to the le

7、ft of it. Do the same with the item labeled “part” that appears below it. Note that the single part in the model consists of 5 individual bodies (stator, rotor, magnet1, magnet2, and “solid”). Right click on “solid” and in the drop down menu, request that it be hidden in the display. Note that the d

8、isplay of any individual bodies may be either suppressed or restored in this manner.12WorkshopANSYS v9.02021/6/168Motor Analysis in the Workbench EnvironmentUse the Winding Tool Editor to bring up the “winding details” and “winding table” panes shown in the red boxes at right.12WorkshopANSYS v9.0202

9、1/6/169Motor Analysis in the Workbench EnvironmentIn the winding details pane, click on the cell to the right of “Center Plane”, then select Plane6 from the tree, then click apply (step 3 at right). This positions/orients the windings so that predefined plane6 is the winding midplane.123: Click “App

10、ly”WorkshopANSYS v9.02021/6/1610Motor Analysis in the Workbench EnvironmentA winding table text file containing information describing the rotor coils (winding.txt) is in the local working directory. Read the table as shown at right. Click the cell to the right of “winding Table File” in the winding

11、 details pane and click on “” to browse for the file.123WorkshopANSYS v9.02021/6/1611Motor Analysis in the Workbench EnvironmentOnce the file is read in, make the following additional changes in the winding details pane:FD2: Slot Angle = 22.5Clash Detection? = YesSetting clash detection to “yes” wil

12、l bring up another row called “Bodies for Clash Detection” in the winding details pane. Click the cell to the right, highlight “rotor” in the tree, and click Apply. This will trigger a check for interference between the defined windings and the rotor stack.234: Click “Apply”1WorkshopANSYS v9.02021/6

13、/1612Motor Analysis in the Workbench EnvironmentAfter the winding specifications have been defined, create the winding by right clicking on “Winding” in the tree and left clicking on “Generate” in the drop down list.WorkshopANSYS v9.02021/6/1613Motor Analysis in the Workbench EnvironmentOne nice way

14、 to visualize the windings is to right click on rotor in the tree and choose “Hide All Other Bodies” in the drop down list. Then, in the tree, click on any of the 6 individual coils comprising the winding (A.1, A.2, B.1, B.2, C.1, C.2). For example, the location of coil A.1 is shown below.231Worksho

15、pANSYS v9.02021/6/1614Motor Analysis in the Workbench EnvironmentNow click on the Project tab and choose “New Simulation”21WorkshopANSYS v9.02021/6/1615Motor Analysis in the Workbench EnvironmentOnce the geometry is successfully attached in Design Simulation, define the current and phase angles for

16、conductors A, B, and C as shown at right:Conductor A: 55 A 0 Conductor B: 55 A 120 Conductor C: 55 A 240 21WorkshopANSYS v9.02021/6/1616Motor Analysis in the Workbench EnvironmentPrepare to define magnetic flux parallel boundaries on the exterior of the modeled domain as shown at right.21WorkshopANS

17、YS v9.02021/6/1617Motor Analysis in the Workbench EnvironmentIn order to more easily select the external surfaces of the modeled domain, suppress all bodies except “Solid”. For example, suppression of the stator body is illustrated at right. Right click on each body to be suppressed to bring up the

18、drop down menu.When you are done, only the “Solid” body should remain unsuppressed (have a “ ” adjacent to it rather than an “x”).21WorkshopANSYS v9.02021/6/1618Motor Analysis in the Workbench EnvironmentTo define flux parallel surfaces, select “Magnetic Flux Parallel” from the tree and click on the

19、 cell adjacent to “Geometry” in the magnetic flux details pane.Position the mouse cursor on any of the surfaces bounding the cylindrical volume and click with the left mouse button. After selecting the first surface, hold down the control button and select another. If necessary, release the Ctrl but

20、ton, use the MMB to reorient the model as needed, and select the third (and final) surface.Click “Apply” in the magnetic flux parallel details pane.2143: Select external surfaces of cylinder using Ctrl + LMBWorkshopANSYS v9.02021/6/1619Motor Analysis in the Workbench EnvironmentRight click on any of

21、 the bodies in the tree and select “Unsuppress All Bodies”.Select “Rotor” from the tree and in the details pane, click on the arrow in the cell to the right of “Material”. From the drop down list, choose “Import”.213WorkshopANSYS v9.02021/6/1620Motor Analysis in the Workbench EnvironmentMake the sel

22、ections shown in the “Import Material Data” dialogue box as shown at right. This will simultaneously import the BH curve for M14 steel into the database and assign this property to the rotor body.You may view the BH data (table and xy plot) by clicking on the arrow in the cell to the right of “Mater

23、ial” in the details pane and selecting “Edit M14 Steel” in the drop down list (see next slide).2134: Select “Edit M14 Steel” from the drop down listWorkshopANSYS v9.02021/6/1621Motor Analysis in the Workbench EnvironmentClick on the thumbnail sketch in the right hand pane to display the xy plot show

24、n at right. Click on the Simulation tab to return to the model.3WorkshopANSYS v9.02021/6/1622Motor Analysis in the Workbench EnvironmentClick on “Stator” in the tree. In the Stator details pane, click on the arrow in the cell to the right of “Material” and choose “M14 Steel” (this material property

25、is now an active part of the database) from the drop down list.312WorkshopANSYS v9.02021/6/1623Motor Analysis in the Workbench EnvironmentInitiate the creation of a new material property for body “Magnet1” as shown at right.312WorkshopANSYS v9.02021/6/1624Motor Analysis in the Workbench EnvironmentC

26、lick on “Add/Remove Properties” in the Electromagnetics section. In the “Add or Remove Properties” dialogue box, choose “Linear Hard Magnetic Material”.312WorkshopANSYS v9.02021/6/1625Motor Analysis in the Workbench EnvironmentDefine the coercivity and remanant magnetization:Hc = 750000 A/mBr = 0.6

27、TIt may also be necessary to supply a “dummy” value for Youngs Modulus to workaround unnecessary error trapping.Right click on “New Material”, select “Rename” from the drop down list, and change the name of the new material to “PM”.1243WorkshopANSYS v9.02021/6/1626Motor Analysis in the Workbench Env

28、ironmentClick on the Design Simulation tab.Click on the “Magnet2” body in the tree.Click on the arrow in the cell to the right of “Material” in the magnet2 details pane and choose “PM”We have now assigned PM properties to both magnets but have yet to define their polarity. They will be radially pole

29、d. The upper magnet (Magnet1) will be poled radially outward (“+x” in a cylindrical coordinate system) while the lower PM will be poled radially inward (“-x” in cylindrical coordinates).1243WorkshopANSYS v9.02021/6/1627Motor Analysis in the Workbench EnvironmentInitiate the creation of a cylindrical

30、 coordinate system.Click on “Model” in the tree.Choose “Insert” from the first drop down list.Choose “Coordinate System” from the second drop down list.123WorkshopANSYS v9.02021/6/1628Motor Analysis in the Workbench EnvironmentClick on “Coordinate Systems” in the tree. Note: make no attempt to modif

31、y predefined “Global Coordinate System”.Click on “Insert” and “Coordinate Systems” in the cascading drop down lists as shown at right.123WorkshopANSYS v9.02021/6/1629Motor Analysis in the Workbench EnvironmentRight click on “Coordinate System” in the tree and choose “Rename” from the drop down list.

32、 Rename the coordinate system as desired (for example, “PM_CSYS”, as shown at right). Click on the cell to the right of “Type” in the PM_CSYS details pane and change to Cylindrical.123WorkshopANSYS v9.02021/6/1630Motor Analysis in the Workbench EnvironmentSelect “Magnet1” in the tree and assign to i

33、t the “PM_CSYS” coordinate system with “+x” polarization in the magnet1 details pane.Do the same for “Magnet2” except set the polarity in the “x” direction.3412WorkshopANSYS v9.02021/6/1631Motor Analysis in the Workbench EnvironmentSelect “Mesh” from the tree. In the mesh details pane, establish the

34、 following settings: Global Control = AdvancedCurve/Proximity = 40Gap Distance: 7e-4 m2134WorkshopANSYS v9.02021/6/1632Motor Analysis in the Workbench EnvironmentRequest the automatic detection of surfaces within 7e-4 m. This will allow further specifications to be made on surfaces found to be withi

35、n this tolerance (next slide).21WorkshopANSYS v9.02021/6/1633Motor Analysis in the Workbench EnvironmentIn the tree, select all surface pairs having a proximity of 7e-4 m (click “Gap Sizing” then hold down the shift key and select “Gap Sizing 6”).Set the Gap Aspect Ratio in the details pane to 3.21W

36、orkshopANSYS v9.02021/6/1634Motor Analysis in the Workbench EnvironmentCreate the mesh21WorkshopANSYS v9.02021/6/1635Motor Analysis in the Workbench EnvironmentIf you wish to view the mesh of an individual body, select it (right mouse button) in the tree, click on “Hide All Other Bodies” in the drop

37、 down list, and click on “Mesh” in the tree. The rotor mesh is shown below.213WorkshopANSYS v9.02021/6/1636Motor Analysis in the Workbench EnvironmentAdd a request for calculated values of “Total Flux Density” on all bodies (the default).21WorkshopANSYS v9.02021/6/1637Motor Analysis in the Workbench

38、 EnvironmentAdd a request for calculated values of “Directional Force/Torque”.21WorkshopANSYS v9.02021/6/1638Motor Analysis in the Workbench EnvironmentSet “Orientation” in the details pane to “Z Axis” (i.e., calculate torque about the global z axis).Click on the cell to the right of “Geometry” in t

39、he details pane and left click in the vicinity of the rotor centroid. You will see a number of “sheets” appear in the display. Left click on these one at a time until you find the one associated with the rotor (the rotor will be highlighted in green as shown at right).Click “Apply” as shown. The rot

40、or should be displayed in a dark blue color.213: Click around here4: Cycle through “sheets” until the rotor is highlighted in green5: Click ApplyWorkshopANSYS v9.02021/6/1639Motor Analysis in the Workbench EnvironmentWe have specified nonlinear BH data for the rotor and stator but will suppress its

41、usage so that the solution can be obtained expediently. Choose “Rotor” in the tree and set “Nonlinear Material Effects” to “No” in the rotor details pane. Do the same for the stator (shown at right).12WorkshopANSYS v9.02021/6/1640Motor Analysis in the Workbench EnvironmentExecute the linear solution

42、 as shown at right.12WorkshopANSYS v9.02021/6/1641Motor Analysis in the Workbench EnvironmentOne the solution has completed (10-15 minutes), you may select an individual body for postprocessing. For example, to view results on the rotor, right click on it in the tree and click on “Hide All Other Bod

43、ies” in the drop down list.12WorkshopANSYS v9.02021/6/1642Motor Analysis in the Workbench EnvironmentSelecting “Total Flux Density” in the tree produces a contour plot of the magnitude of the B field in the unhidden part(s).The B field may also be plotted as vectors by clicking on the vector graphic

44、s button. This button toggles between contour and vector displays.1212: Access vector plot representationWorkshopANSYS v9.02021/6/1643Motor Analysis in the Workbench EnvironmentYou may also experiment with the vector plot controls. Vectors may be “element aligned” (one per element) or “grid aligned”

45、 (displayed with a user selected density). Length may be scaled for better visibility. The wire frame button makes the body transparent so that the vectors within the volume of the body may be visualized.Magnitude scaled3D arrowsWireframe DisplayGrid alignedWorkshopANSYS v9.02021/6/1644Motor Analysis in the Workbench EnvironmentA contour of the z component magnetic forces and net rotor torque about the global z axis may be produced as shown at right.1Net TorqueWorkshopANSYS v9.0 若有不当之处，请指正，谢谢！若有不当之处，请指正，谢谢！