Getting Started with Maxwell: A 2D Magnetostatic Solenoid ...

1 Getting Started with Maxwell: A 2D Magnetostatic Solenoid ProblemANSYS, Technology DriveCanonsburg, PA 15317 Tel: (+1) 724 746 3304 Fax: (+1) 724 514 9494 General Information: Support: 2010 Inventory: 002880 The information contained in this document is subject to change without notice. ANSYS, Inc. makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. ANSYS, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

2 2010 SAS IP, Inc. All rights , Maxwell and Optimetrics are registered trademarks or trademarks of SAS IP, Inc. All other trademarks are the property of their respective and Parasolid geometry translators incorporated in this software are used under license from Siemens PLM 2006. All rights editions of this manual incorporate all material updated since the previous edi tion. The manual printing date, which indicates the manual s current edition, changes when a new edition is printed. Minor corrections and updates that are incorporated at reprint do not cause the date to packages may be issued between editions and contain additional and/or replacement pages to be merged into the manual by the user.

3 Pages that are rear ranged due to changes on a previous page are not considered to be Software Version1 Feb 2008 Maxwell 122 April 2010 Maxwell 133 November 2010 Maxwell Started with Maxwell: A 2D Magnetostatic Solenoid Problem iiConventions Used in this GuidePlease take a moment to review how instructions and other useful information are presented in this guide. The project tree is the main project area of the Project Man-ager window. These two terms (project tree and Project Manager window) may be used interchangeably in this guide. Procedures are presented as numbered lists. A single bullet indicates that the procedure has only one step.

4 Bold type is used for the following:- Keyboard entries that should be typed in their entirety exactly as shown. For example, copy file1 means to type the word copy, to type a space, and then to type On-screen prompts and messages, names of options and text boxes, and menu commands. Menu commands are often separated by carats. For example, click Max-well>Excitations>Assign> Labeled keys on the computer keyboard. For example, Press Enter means to press the key labeled Enter. Menu commands are often separated by the > symbol. For example, Click File>Exit . Italic type is used for the following:- The titles of publications.

5 - Keyboard entries when a name or a variable must be typed in place of the words in italics. For example, copy file name means to type the word copy, to type a space, and then to type a file name. The plus sign (+) is used between keyboard keys to indicate that you should press the keys at the same time. For exam-ple, Press Shift+F1 means to press the Shift key and the F1 key at the same time. Toolbar buttons serve as shortcuts for executing com-mands. Toolbar buttons are displayed after the command they execute. For example, iii Getting Started with Maxwell: A 2D Magnetostatic Solenoid Problem Click Draw>Line means that you can also click the Draw Line toolbar button to execute the Line Started with Maxwell: A 2D Magnetostatic Solenoid Problem ivGetting HelpAnsoft Technical SupportTo contact the Ansoft technical support staff in your geo-graphical area, please go to the Ansoft website, , click the Contact button, and then click Support.

6 Phone numbers and e-mail addresses are listed for the technical support staff. You can also contact your Ansoft account manager to obtain this Ansoft software files are ASCII text and can be sent conve-niently by e-mail. When reporting difficulties, it is helpful to include specific information about what steps were taken or what stages the simulation reached. This promotes more rapid and effective HelpTo access online help from the Maxwell user interface, do one of the following: To open a help topic about a specific Maxwell menu com-mand, press Shift+F1, and then click the command or tool-bar icon. To open a help topic about a specific Maxwell dialog box, open the dialog box, and then press F1.

7 V Getting Started with Maxwell: A 2D Magnetostatic Solenoid ProblemContents-1 Table of Contents1. IntroductionThe Sample Problem .. 1-4 Goals .. 1-62. Setting Up the DesignOpen Maxwell and Save a New Project .. 2-2 Specify a Solution Type .. 2-3 Set the Drawing Units .. 2-33. Creating the Geometric ModelCreate the Geometry .. 3-2 Draw the Plugnut .. 3-2 Draw the Core .. 3-4 Keyboard Entry .. 3-5 Draw the Coil .. 3-5 Draw the Yoke .. 3-6 Draw the Bonnet .. 3-8 Create the Background (Region) .. 3-94. Setting Up the Solenoid ModelAssign Materials to Objects .. 4-2 Access Material Database .. 4-2 Getting Started with MaxwellContents-2 Assign Copper to the Coil.

8 4-3 Assign Cold Rolled Steel to the Bonnet and Yoke 4-3 Select Objects and Create the Material .. 4-3 Define the B-H Curve For Cold Rolled Steel 4-4 Add B-H Curve Points for Cold Rolled Steel 4-5 Assign ColdRolledSteel to the Yoke and Bonnet 4-6 Assign Neo35 to the Core .. 4-7 Select the Object and Create the Material .. 4-7 Select Independent Material Properties .. 4-8 Enter Material Properties .. 4-9 Assign Neo35 to the Core and Specify Direction of Magnetization .. 4-9 Create a Relative Coordinate System for the Mag-net Orientation .. 4-10 Complete the Alignment of the Magnet .. 4-10 Create SS430 Material and Assign to Plugnut 4-11 Select Objects and Create Material.

9 4-11 Define the B-H Curve for SS430 .. 4-11 Add B-H Curve Points for SS430 .. 4-12 Assign SS430 to the Plugnut .. 4-13 Accept Default Material for Background .. 4-14 Set Up Boundaries and Current Sources .. 4-15 Types of Boundary Conditions and Sources .. 4-16 Set Source Current on the Coil .. 4-16 Assign a Current Source to the Coil .. 4-17 Assign Balloon Boundary to the Background . 4-19 Pick the Background .. 4-19 Set Up Force Computation .. 4-20 Set Up Inductance Computation .. 4-215. Generating a SolutionAdd Solution Setup .. 5-2 Getting Started with MaxwellContents-3 Adaptive Analysis .. 5-3 Parameters.

10 5-4 Mesh Refinement Criteria .. 5-5 Solver Residual .. 5-5 Start the Solution .. 5-6 Monitoring The Solution .. 5-7 Viewing Convergence Data .. 5-8 Solution Criteria .. 5-9 Completed Solutions .. 5-10 Plotting Convergence Data .. 5-11 Viewing Statistics .. 5-126. Analyzing the SolutionView Force Solution .. 6-2 Plot the Magnetic Field .. 6-37. Adding Variables to the Solenoid ModelThe Solenoid Model .. 7-2 Adding Geometric Variables .. 7-3 Add a Variable to the Core Object .. 7-3 Set the Coil Current to a Variable .. 7-5 Set Variable Ranges for Parametric Analysis . 7-6 Redefining Zero Current Sources.