We present a finite-difference method for the topology optimization of permanent magnets that is based on the FFT accelerated computation of the stray-field. The presented method employs the density approach for topology optimization and uses an adjoint method for the gradient computation. Comparsion to various state-of-the-art finite-element implementations shows a superior performance and accuracy. Moreover, the presented method is very flexible and easy to implement due to various preexisting FFT stray-field implementations that can be used.
@article{arxiv.1707.09898,
title = {A fast finite-difference algorithm for topology optimization of permanent magnets},
author = {Claas Abert and Christian Huber and Florian Bruckner and Christoph Vogler and Gregor Wautischer and Dieter Suess},
journal= {arXiv preprint arXiv:1707.09898},
year = {2017}
}