Maxwell_v16_3D_WS05_BasicTransient_SourcesAndCircuit

Workshop 5: Basic Transient Sources and Circuit

ANSYS Maxwell 3D V16© 2013 ANSYS, Inc. May 21, 2013 1 Release 14.5

About Workshop Transient Setup– This workshop discusses basic setup details of Magnetic Transient solver– The transient setup is described with two different excitation methods Example 1: Transient With Sources– This 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 methods Exampled 2: Transient With Circuits– This example explains the setup of transient excitations through External Circuit method.– The excitation circuit is setup using Maxwell Circuit Editor– Maxwell excitation values are calculated based on the circuit model assigned through circuit editor

© 2013 ANSYS, Inc.

May 21, 2013

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Example 1: Transient With Sources

© 2013 ANSYS, Inc.

May 21, 2013

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Problem Setup Create Design– Select the menu item Project Insert Maxwell 3D Design, or click on the icon– Change the name of the Design to BE_Trans_Sources

Set the Solution Type:– Select the menu item Maxwell 3D Solution Type– Solution Type Window: 1. Choose Magnetic> Transient 2. Click the OK button

© 2013 ANSYS, Inc.

May 21, 2013

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Create Core Create Regular Polyhedron– Select the menu item Draw Regular Polyhedron 1. Using the coordinate entry fields, enter the center of the base– X: 0, Y: 0, Z: 0, Press the Enter key 2. Using the coordinate entry fields, enter the radius– dX: 2, dY: 2, dZ: 20, Press the Enter key 3. Number of Segments: 24– Change the name of the Object to Core– Change the material of the object to ferrite

© 2013 ANSYS, Inc.

May 21, 2013

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Create Coil Create Regular Polyhedron– Select the menu item Draw Regular Polyhedron 1. Using the coordinate entry fields, enter the center of the base– X: 0, Y: 0, Z: 0, Press the Enter key 2. Using the coordinate entry fields, enter the radius– dX: 3, dY: 3, dZ: 20, Press the Enter key 3. Number of Segments: 24– Change the name of the Object to Coil– Change the material of the object to copper

Subtract Objects– Press Ctrl and select the objects Coil and Core from the history tree– Select the menu item, Modeler Boolean Subtract 1. Blank Parts: Coil 2. Tool Parts: Core 3. Clone tool objects before operation: Checked 4. Click the OK button

© 2013 ANSYS, Inc.

May 21, 2013

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Create Coil Terminal Create Coil terminal– Select the object Coil from the history tree– Select the menu item Modeler Surface Section 1. Section Plane: YZ 2. Press OK– Change the name of the resulting sheet to Terminal

Separate Sheets– Select the sheet Terminal from the history tree– Select the menu item Modeler Boolean Separate Bodies

Delete Extra Sheet–

Select the sheet Terminal_Separate1 from the history tree– Select the menu item Edit Delete

© 2013 ANSYS, Inc.

May 21, 2013

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Assign ExcitationNote: The excitation for this problem will be a voltage source with a 1KHz triangular wave superimposed on a 50 Hz sine wave that has a 50 volt DC offset. Triangular wave will be specified through a design dataset.

Specify Dataset– Select the menu item Maxwell 3D Design Datasets– In Datasets window, select Add– In Add Dataset window, Name: DSet_A Coordinates: 1. X1= 0 Y1= 0 2. X2= 250e-6 Y2= 1 3. X3= 750e-6 Y3= -1 4. X4= 1e-3 Y4= 0 Select OK and Done

© 2013 ANSYS, Inc.

May 21, 2013

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Release 14.5

Assign Excitation (Contd…) Add Winding– Select the menu item Maxwell 3D Excitations Add Winding– In Winding window, 1. Name: Winding_A 2. Type: Voltage 3. Stranded: Checked 4. Initial Current: 0 A 5. Resistance: 25 ohm 6. Inductance: 0 H 7. Voltage: 50+ 25*sin(2*PI*50*Time)+ 5*pwl_periodic(DSet_A, Time) 8. Press OK Note: The expression specified for Voltage has three different components 1. The first term is a 50 V DC offset 2. The second term is a 25 Vp-p, 50 Hz sine wave 3. The third term is a 5 Vp-p, 1 KHz triangular wave Final applied voltage will be combined output of all three components© 2013 ANSYS, Inc. May 21, 2013 9 Release 14.5

Assign 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: CoilTerminal1 2. Number of Conductors: 150 3. Press OK

Add Terminal to Winding– In Project manager window, expand the tree for Excitations– Right click on the tab CoilTerminal1 and select Add to Winding– In Add to Winding window, 1. Select Winding_A 2. Press OK

© 2013 ANSYS, Inc.

May 21, 2013

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Release 14.5

Create Region Create Simulation Region– Select the menu item Draw Region– In Region window, 1. Padding all directions similarly: Checked 2. Padding Type: Percentage Offset– Value: 500 3. Press OK

Note: As core and coil are in direct contact with each other, an insulation boundary is needed to be defined between them to avoid current leakage from coil to core. But in or case its is not necessary as the ferrite core has a conductivity= 0.01S/m which below the default conductor/insulation threshold of 1S/m

© 2013 ANSYS, Inc.

May 21, 2013

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Release 14.5

Apply Mesh OperationsNote: A transient solver does not use the adaptive meshing technique. Thus manual mesh specifications are required to refine the mesh in important regions to achieve accuracy of results.

Apply Mesh Operations for Core– Select the object Core from the history tree– Select the menu …… 此处隐藏：5228字，全部文档内容请下载后查看。喜欢就下载吧 ……