Analytical study and corresponding experiments for iron loss inside laminated core under AC-DC hybrid excitation

In this paper, a novel measurement scheme for the magnetic properties of GO silicon steel lamination under ac-dc hybrid excitation is proposed . The newly developed system has the advantage that there is no interplay between ac and dc excitations, both ac and dc excitation applied to one and the same exciting winding, making the control easy, compared with the usual technique using a ring core or SST, having separate ac and dc exciting windings . Moreover, the exciting mode of this system is fairly the same as the actual condition of the dc-biased transformers.