Studies on Ultra-Low Loss Magnetic Materials for Innovative Power Electronics

In this work, we addressed various subjects aimed at developing high-performance magnetic devices for next-generation power electronics applications. Among these, three topics were selected and reviewed. The first is the development of a highly accurate core loss measurement method combined with impedance measurement. This method also enables core loss calibration. The second is a broadband core loss analysis based on magnetization processes. We successfully explained the experimentally observed broadband core loss behavior in terms of a change in the magnetization process, and compared the results with classical models such as the Steinmetz equation. The third is the development of novel ultra-low core loss magnetic materials for inductor and transformer applications, based on nanocrystalline alloys with high saturation magnetization.