Authors: C. Mueller, G. Scheinert and H. Uhlmann
Affilation: Technical University of Ilmenau, Germany
Pages: 649 - 654
Keywords: Sensitivity analysis, tolerance analysis, finite differences, magnetostatics, global field quantities
The paper describes an approach to general-purpose design sensitivity analysis for electromagnetic devices. Micro system technology often requires the assessment of manufacturing techniques or effects of tolerances. Emphasis is therefore put on the adaptability to different requirements, depending on desired accuracy, computational effort and significance. By introducing a distributed sensitivity function, the effect of small contour distortions can be described. The design sensitivity is based on a magnetic double-layer model. It is shown that sensitivity can be expressed in terms of virtual anti-parallel double-layer currents, flowing in a movable contour. The sensitivity is explicitly derived for two-dimensional coordinate systems using the finite-difference method within a commercially available field calculation program. The proposed method is demonstrated by means of an example of two magnetic planes facing each other.