Abstract

A method to optimize the topology of hard as well as soft magnetic structures is implemented using the density approach for topology optimization. The stray field computation is performed by a hybrid finite element–boundary element method. Utilizing the adjoint approach the gradients necessary to perform the optimization can be calculated very efficiently. We derive the gradients using a “first optimize then discretize” scheme. Within this scheme, the stray field operator is self-adjoint allowing to solve the adjoint equation by the same means as the stray field calculation. The capabilities of the method are showcased by optimizing the topology of hard as well as soft magnetic thin film structures and the results are verified by comparison with an analytical solution.

Details

Title
A topology optimization algorithm for magnetic structures based on a hybrid FEM–BEM method utilizing the adjoint approach
Author
Wautischer Gregor 1 ; Abert Claas 2 ; Bruckner Florian 1 ; Slanovc Florian 1 ; Suess Dieter 2 

 University of Vienna, Faculty of Physics, Vienna, Austria (GRID:grid.10420.37) (ISNI:0000 0001 2286 1424) 
 University of Vienna, Faculty of Physics, Vienna, Austria (GRID:grid.10420.37) (ISNI:0000 0001 2286 1424); University of Vienna, Research Platform MMM Mathematics-Magnetism-Materials, Vienna, Austria (GRID:grid.10420.37) (ISNI:0000 0001 2286 1424) 
Publication year
2022
Publication date
2022
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2621822731
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.