Numerical analysis of magnetic field diffusion in ferromagnetic laminations by minimization of constitutive error

In this article, the diffusion of electromagnetic fields into a ferromagnet ic lamination is numerically studied by means of an error-based numerical m ethod. This technique has been developed so far only for the case of nonhys teretic constitutive relations. The generalization to the hysteretic case r equires a modification of the technique in order to take into account the e volution of the "magnetization state" of the media. Numerical computations obtained by using this approach are reported and discussed. (C) 2000 Americ an Institute of Physics. [S0021-8979(00)80708-2].