Characterization of a High Frequency Transformer with HTS Winding and Amorphous Magnetic Core for Power Converter Application

Power converter with high frequency transformers (HFTs) are being widely used in the field of electric vehicle, switching mode power supply, renewable energy sectors including oceanic wave energy converter and so on. This paper proposes an improved compact design of a 4.75 kW, 100 kHz superconducting HFT that would offer size minimization facilities of power converters. Yttrium barium copper oxide (YBCO) material-based superconductor is used for maximum power transfer analysis. The proposed superconducting winding is compact which would minimize the thermal limitation and proximity effect. The proposed HFT is characterized for using the conventional and advanced magnetic materials with gapped and ungapped structures. Gapped toroidal core structure of HFT offers improved capability of withstanding de bias magnetizing current which occurs in many cases including isolation. Simulation results show the comparison of magnetic flux density, core loss, and power including air gap effect. YBCO windings based HFT contributes to transfer approximately 11.76% more power compared to that of using the copper winding.