Two calculation methods of eddy-current losses in high frequency transformer

Abstract

This paper deduces two novel analytical model of eddy-current power losses in high frequency transformer core. One is based upon the electrical field strength outside the core. The other is based on the electrical field strength inside the core. The formulas are frequency dependent, taking into account the effect of skin-effect and leakage fluxes. The calculated results with two formulas are in good agreement.