Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 51: Magnetism Poster B

MA 51.33: Poster

Donnerstag, 4. April 2019, 15:00–18:00, Poster C

Designing non-conventional 3-D coils — •Assja Laas and Christian Schröder — Bielefeld Institute for Applied Materials Research (BIfAM), Computational Materials Science and Engineering (CMSE), University of Applied Sciences Bielefeld, Department of Engineering Sciences and Mathematics, Interaktion 1, D-33619 Bielefeld

Compact devices for inductive energy and information transfer require the design of appropriate non-conventional 3-D induction coils. This is because only a small volume for placing the coil inside the device is available, and one is only interested in the near-field characteristics of the generated magnetic field. In our study we focus on design strategies for appropriate three-dimensional induction coils by exploiting an inverse methodology. A target field is specified over a certain region and an approximation of the current density through a Fourier series expansion is derived which generates the desired field. Because of the ill-posed nature of this problem a Tikhonov regularization with a penalty term is used to calculate the unknown parameters of the Fourier series expansion. In this contribution we discuss the effect of different penalty terms, i.e. a 2-norm term, a gradient and a laplace term on the resulting current densities. Based on this, we obtain the coil windings by calculating the maximum of a current density map and applying a stream function approach.