A Novel Optimization Method for Accurate AC resistance prediction of High Frequency Transformer

Existing methods for high frequency design have two main limitations which significantly affect the design accuracy: (1) the choice of the suitable filling factor and (2) the inaccurate prediction of the Ac resistance. This paper proposes a novel numerical method to determine an accurate estimation of the Ac resistance and avoid the need of using the filling factor in the design process. The performed experimental results are in good agreement with the developed theoretical results. The study shows that the variation of the optimal B is the inverse of the root-mean-square core volume variation.