Why Flux 12.1 (or higher version) is giving a different result on iron losses computed with Bertotti method than in previous version?

asoualmi

It is due to the difference of the computation method used in Flux 12.1 and in previous versions. Indeed, before Flux 12.1, the computation of the hysteresis losses in the Bertotti model was using the value of Bmax (that could be quite high in front of a magnet). The iron losses computed using Bmax made the assumption that B varied in the interval [+Bmax; -Bmax], which involved abnormally high losses. Since Flux 12.1, the coefficient to compute the hysteresis losses is Bmax-Bmin instead of Bmax.