ABSTRACT

P K f B K f K fv h m c m e m+) B ( )B .2 2) 1 5 (1)

where, Kh is the hysteresis core loss coefficient, Kc is the eddy-current core loss coefficient, Ke is the excess core loss coefficient, Bm is amplitude of the AC flux component, f is the frequency. The core loss coefficients are derived from iron loss tester. The core loss is calculated by FEM software in this paper.