The experimental determination of the iron losses created
in a localized zone of an electric machine is a difficult operation. We try
to verify and to valid by local thermal measurements the sum of local iron
losses. To realize our verification, we determine the optimal measurement
conditions by calculation and simulation before the realization of a
prototype specially designed for this operation. This structure represents a
part of an electric machine, with emphasis on inhomogeneous flux
distribution areas. This device permits to obtain an experimental
temperature mapping which is compared to the calculated temperature
distribution obtained by finite elements modelling.