7 Electromagnetic Phenomena in Ferromagnetic Bodies
7.1 Approximation of Magnetization Characteristics
Due to complexity of the nonlinear electrodynamic processes in iron, various kinds of approximate and substitution methods have been broadly and effectively used in this area.
An approximation, as defined in this context, is an analytical representation of empirically determined magnetization characteristics of iron. Since an experimentally measured characteristic has always a limited number of points, its approximation is always connected with the problem of interpolation. Analytical approximation, however, contrary to interpolation, does not have to run through given points [7.3]. There exist many methods of interpolation and extrapolation ...