Core loss evaluation of high-frequency transformers in high-power DC-DC converters

High-Frequency Transformers (HFTs) are one of the key elements of high-power converters in weight and volume restricted applications. HFTs are the main contributor to realize the voltage adaption, isolation requirements, as well as high-power density requirement of future high-power DC-DC converters. This paper addresses different methods to evaluate core losses of HFTs when they are exposed to power-electronic waveforms. Moreover, this paper addresses different magnetic materials which are suitable at high frequencies and presents the experimental results of magnetic core characterization under non-sinusoidal waveforms.