maxwell_v16_3d_ws05_basictransient_

1、Workshop 5:Basic Transient Sources and CircuitANSYS Maxwell 3DV161 2013 ANSYS, Inc.May 21, 2013Release 14.5About WorkshopTransient SetupThis workshop discusses basic setup details of Magnetic Transient solverThe transient setup is described with two different excitation methodsExample 1: Transient W

2、ith SourcesThis example shows setup of Transient solver with time varying excitation applied through datasets and equation.Final assigned excitation is evaluated based on combined output of both methodsExampled 2: Transient With CircuitsThis example explains the setup of transient excitations throug

3、h External Circuit method.The excitation circuit is setup using Maxwell Circuit EditorMaxwell excitation values are calculated based on the circuit model assigned through circuit editor2 2013 ANSYS, Inc.May 21, 2013Release 14.5Example 1: Transient With Sources3 2013 ANSYS, Inc.May 21, 2013Release 14

4、.5Problem SetupCreate Design Select the menu item Project Insert Maxwell 3D Design, or click onthe icon Change the name of the Design to BE_Trans_SourcesSet the Solution Type:Select the menu item Maxwell 3D Solution TypeSolution Type Window:1. Choose Magnetic Transient2. Click the OK button4 2013 AN

5、SYS, Inc.May 21, 2013Release 14.5Create CoreCreate Regular PolyhedronSelect the menu item Draw Regular Polyhedron1. Using the coordinate entry fields, enter the center of the base X: 0, Y: 0, Z: 0, Press the Enter key2. Using the coordinate entry fields, enter the radius dX: 2, dY: 2, dZ: 20, Press

6、the Enter key3. Number of Segments: 24Change the name of the Object to CoreChange the material of the object to ferrite5 2013 ANSYS, Inc.May 21, 2013Release 14.5Create CoilCreate Regular PolyhedronSelect the menu item Draw Regular Polyhedron1. Using the coordinate entry fields, enter the center of t

7、he base X: 0, Y: 0, Z: 0, Press the Enter key2. Using the coordinate entry fields, enter the radius dX: 3, dY: 3, dZ: 20, Press the Enter key3. Number of Segments: 24Change the name of the Object to Coil Change the material of the object to copperSubtract Objects Press Ctrl and select the objects Co

8、il and Core from the history tree Select the menu item, Modeler Boolean Subtract1. Blank Parts: Coil2. Tool Parts: Core3. Clone tool objects before operation: Checked4. Click the OK button6 2013 ANSYS, Inc.May 21, 2013Release 14.5Create Coil TerminalCreate Coil terminal Select the object Coil from t

9、he history tree Select the menu item Modeler Surface Section1. Section Plane: YZ2. Press OK Change the name of the resulting sheet to TerminalSeparate Sheets Select the sheet Terminal from the history tree Select the menu item Modeler Boolean Separate BodiesDelete Extra Sheet Select the sheet Termin

10、al_Separate1 from the history tree Select the menu item Edit Delete7 2013 ANSYS, Inc.May 21, 2013Release 14.5Assign ExcitationNote: The excitation for this problem will be a voltage source with a 1KHz triangularwave superimposed on a 50 Hz sine wave that has a 50 volt DC offset. Triangular wave will

11、 be specified through a design dataset.Specify DatasetSelect the menu item Maxwell 3D Design DatasetsIn Datasets window, select AddIn Add Dataset window,Name: DSet_ACoordinates: 1. X1 = 02. X2 = 250e-63. X3 = 750e-64. X4 = 1e-3Y1 = 0Y2 = 1Y3 = -1Y4 = 0Select OK and Done8 2013 ANSYS, Inc.May 21, 2013

12、Release 14.5Assign Excitation (Contd)Add WindingSelect the menu item Maxwell 3D Excitations Add WindingIn Winding window,1. Name: Winding_A2. Type: Voltage3. Stranded: Checked4. Initial Current: 0 A5. Resistance: 25 ohm6. Inductance: 0 H7. Voltage: 50 + 25*sin(2*PI*50*Time) + 5*pwl_periodic(DSet_A,

13、Time)8. Press OKThe expression specified for Voltage has three different components1. The first term is a 50 V DC offset2. The second term is a 25 Vp-p, 50 Hz sine wave3. The third term is a 5 Vp-p, 1 KHz triangular waveFinal applied voltage will be combined output of all three componentsNote:9 2013

14、 ANSYS, Inc.May 21, 2013Release 14.5Assign Excitation (Contd)Assign Coil Terminal Select the sheet Terminal from the history tree Select the menu item Maxwell 3D Excitations Assign Coil Terminal In Current Excitation window,1. Name: CoilTerminal12. Number of Conductors: 1503. Press OKAdd Terminal to

15、 WindingIn Project manager window, expand the tree for ExcitationsRight click on the tab CoilTerminal1 and select Add to WindingIn Add to Winding window,1. Select Winding_A2. Press OK10 2013 ANSYS, Inc.May 21, 2013Release 14.5Create RegionCreate Simulation RegionSelect the menu item Draw RegionIn Re

16、gion window,1. Padding all directions similarly: Checked2. Padding Type: Percentage Offset Value: 5003. Press OKNote: As core and coil are in direct contact with each other, an insulation boundary isneeded to be defined between them to avoid current leakage from coil to core. But in or case its is n

17、ot necessary as the ferrite core has a conductivity = 0.01S/m which below the default conductor/insulation threshold of 1S/m11 2013 ANSYS, Inc.May 21, 2013Release 14.5Apply Mesh OperationsNote: A transient solver does not use the adaptive meshing technique. Thus manualmesh specifications are require

18、d to refine the mesh in important regions to achieve accuracy of results.Apply Mesh Operations for CoreSelect the object Core from the history treeSelect the menu item Maxwell 3D Mesh Operations Assign On Selection Length BasedIn Element Length Based Refinement window,1. Name: Length12. Restrict Len

19、gth Of Elements: Unchecked3. Restrict the Number of Elements: Checked4. Maximum Number of Elements: 10005. Press OK12 2013 ANSYS, Inc.May 21, 2013Release 14.5Apply Mesh Operations (Contd)Apply Mesh Operations for CoilSelect the object Coil from the history treeSelect the menu item Maxwell 3D Mesh Op

20、erations Assign On Selection Length BasedIn Element Length Based Refinement window,1. Name: Length22. Restrict Length Of Elements: Unchecked3. Restrict the Number of Elements: Checked4. Maximum Number of Elements: 10005. Press OK13 2013 ANSYS, Inc.May 21, 2013Release 14.5AnalyzeCreate an analysis se

21、tup:Select the menu item Maxwell 3D Analysis Setup Add Solution SetupSolution Setup Window:1. General tab Stop Time: 20 ms Time Step: 100 us2. Click the OK buttonRun Solution Select the menu item Maxwell 3D Analyze AllNote: By default few output quantities are calculated for all time steps. Fields a

22、resaved only for Stop time. If user need to post process fields for any in-between time steps, they need to save the fields at required time steps using save fields tab.14 2013 ANSYS, Inc.May 21, 2013Release 14.5Plot the Voltage and CurrentCreate PlotsSelect the menu item Maxwell 3D Results Create T

23、ransient Report Rectangular PlotIn Reports window,1. Category: Winding2. Quantity: Current (Winding_A)3. Select New Report4. Change Quantity to InputVoltage (Winding_A)5. Select New ReportInput VoltageCurrent15 2013 ANSYS, Inc.May 21, 2013Release 14.5Example 2: Transient With Circuit16 2013 ANSYS, I

24、nc.May 21, 2013Release 14.5Problem SetupCopy DesignSelect the design “BE_Trans_Sources” from Project manager tree.Right click and select CopySelect the name of the project from Project Manager tree Right click on it and select PasteRename the new design as “BE_Trans_Circuit”Modify Winding SetupExpan

25、d the Project Manager tree to view ExcitationsDouble click on Winding_A under Excitations Change the Type to ExternalPress OKNote: When Excitation Type is set to External, External circuit will be used to calculateinputs for winding17 2013 ANSYS, Inc.May 21, 2013Release 14.5Create External CircuitLa

26、unch Maxwell Circuit EditorSelect the menu item Maxwell 3D Excitations External Circuit Edit External CircuitIn Edit External Circuit window, Select Edit CircuitMaxwell Circuit Editor will launch in separate windowIn Maxwell Circuit Editor a Component is created by default correspondingtowinding in

27、Maxwell. The name of the winding is same as as used in Maxwell inMaxwell 3D Excitations Add Winding. If users add winding by themselves they should ensure these names match18 2013 ANSYS, Inc.May 21, 2013Release 14.5Create External Circuit (Contd)Add Source ComponentsChange the tab in Project Manager

28、 window to ComponentsIn Project Manager window, expand the tree for Maxwell Circuit Elements Sources. Select the element Vsin from the tree, drag and drop it on the worksheet.Press Esc to exit component insertionDouble click on the component to modify its properties1. Change the value of Va to 100 V

29、2. Change the value of VFreq to 50 HzSimilarly add another source VSin1. Change the value of Va to 10 V2. Change the value of VFreq to 1000 Hz19 2013 ANSYS, Inc.May 21, 2013Release 14.5Create External Circuit (Contd)Add Other Components Similarly add Passive Elements Res1. Change the value of R to 2

30、5 ohm Add Probes VoltmeterBuild CircuitSelect the menu item Draw Wire to draw wiresSelect the menu item Draw GroundBuild the circuit as shown in imageto add groundNote: Circuit will provide a 10V 1KHz sinusoid superimposed on 100V50Hz Sine wave.Release 14.520 2013 ANSYS, Inc.May 21, 2013Transfer Cir

31、cuit to the MaxwellSave File Select the menu item File Save1. Save the file with the name WS5_BasicTransient_Circuit.amcpExport Circuit Select the menu item Maxwell Circuit Export Netlist1. Save the file with the name WS5_BasicTransient_Circuit.sphImport circuit in MaxwellReturn to Maxwell windowIn Edit External Circuit window,1.2.Select CancelSelect the tab Import Circuit3. Browse to file WS5_BasicTransient_Circuit.sph4. Select the file and press OK21 2013 ANSYS, Inc.May 21, 2013Release 14.5AnalyzeRun Solution Solution se