Prediction of magnetic power losses in soft laminations under DC-biased supply

Power losses in soft magnetic laminations under DC-biased supply are predicted by applying two different approaches. A simple analytical formulation, based on the concept of loss separation, is provided first, which requires the knowledge of a major quasi-static hysteresis loop and two-frequency conventional loss measurement as the sole input information. A numerical finite element solution to the electromagnetic field distribution in the material, associated with application of the dynamic Preisach model of magnetic hysteresis, is also performed. It is shown that the latter overcomes limitations of the former ensuing from appearance of the skin effect at high frequencies. (c) 2004 Elsevier B.V. All rights reserved.