Magnetic Systems

NM GmbH applies CAE with success to the analysis and the optimization of magnetic circuits and devices. The smart combination of simulation models in two- and three-dimensional domains provides an efficient and cost-effective solution to complex R&D tasks. Up to now, we have already applied this approach in the following fields: proximity effect in sensors; inductive phenomena including thermal effects (e.g., eddy current heating); magneto-static devices involving permanent magnets; etc.

Modeling of the proximity-effect

A major difficulty in designing high-frequency inductors is to properly account for the influence of eddy current effects in windings. These phenomena include skin- and proximity-effect losses. Skin-effect losses can be taken into account by a simple back-of-the-envelop calculation. However, proximity-effect losses are much more difficult to compute. This is because the reel and wire geometries, as well as the wire layout, have a large impact on the proximity-effect losses. It is therefore necessary to apply numerical methods that incorporate geometrical details into the solution scheme.