The applications such as the optimal control of the SRM require a fast
lumped state model, which is widely studied in the literature. The me
thod used to obtain the inductances from the FE field computation, in
the saturated case, is known as the energy perturbation method. We sug
gest here both an improvement of this method and a strategy for buildi
ng an adaptative map of the coenergy, which are required by the lumped
model.