|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Minimizing Losses in Ferromagnetic Metallic Glass Power Transformers
||Michael Floyd, Marios Demetriou, William Johnson
|On-Site Speaker (Planned)
Currently, 3% of losses in the United States’ electrical grid come from power transformers. Owing to high saturation magnetizations and low coercive forces, ferromagnetic metallic glasses are currently offered as a solution to limit such losses. But are the commercially offered micron-thick ribbon cores the best geometry to mitigate these losses? In this work, we analyzed the effect of thickness on the losses in Fe<SUB>68</SUB>Mo<SUB>4</SUB>Ni<SUB>3</SUB>Co<SUB>5</SUB>Si<SUB>1</SUB>P<SUB>11.5</SUB>C<SUB>5</SUB>B<SUB>2.5</SUB> as a function of frequency and magnetization, and found the optimal characteristic thickness to exhibit a logarithmic dependence on frequency. Optimal thicknesses are found to range from 400Ám for frequencies on the order of 100 Hz to 100Ám for frequencies of ~1 GHz. These characteristic thicknesses are larger than the 50Ám range currently achievable with commercial melt spinning approaches. Anomalous losses, which dominate over classic eddy current losses in some geometries, account for the optimal character thicknesses in this range.
||Planned: Supplemental Proceedings volume