Abstract
The paper presents a very useful method for computation of the sensitivities of electrical machines, taking into account the non-linearity of the ferromagnetic bodies. In the first step, the magnetic field in non-linear media and the performances of the given machine are calculated. The non-linear medium is replaced with a linear medium having a magnetic polarization that is iteratively corrected by the flux density. Each linear field problem is solved using the periodic Green function. In the second step, the difference of the magnetic field due to the small modification is computed directly. The polarization of the eliminated ferromagnetic domain is the field source. The{\bf B-I} relation is given by Frechet first derivative.
Get full access to this article
View all access options for this article.