Iron lamination efficient representation in power transformers

The paper presents a methodology enabling the accurate representation of ir on losses in magnetic cores for a frequency range up to 10 kHz. The classic al subdivision of iron losses into hysteresis and eddy current phenomena ha s been adopted. Hysteresis losses are calculated by means of a conveniently modified Preisach-Neel model representation while iron losses are taken in to account through a Foster II equivalent circuit representation of the lam ination. A final equivalent circuit of sufficient accuracy, combining both hysteresis and eddy current losses contributions is proposed. The model val idity has been checked using an Epstein experimental set-up. (C) 2001 Publi shed by Elsevier Science B.V.