Modification of Nanocrystalline Fe-Cu-Nb-Si-B Alloys and Their Applications as Magnetic Cores in Rail Power Transformers
A. Łukiewskaa, M. Łukiewskib, J. Olszewskia
aInstitute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
bTRAFECO, Dolna 4, 42-283 Boronow, Poland
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The microstructure and some magnetic properties of the nanocrystalline Fe76-xCu1NbxSi13B10 (x=2 or 3) alloys obtained by one-step or two-steps annealing of amorphous ribbons (at 830 K for 30 min or at 660 K for 30 min and then at 830 K for 30 min, respectively) were investigated. Using the core made of the nanocrystalline Fe73Cu1Nb3Si13B10 alloy, the single-phase transformer of 40 kVA power for operation in the rail static converter has been designed. Until now used transformers have 3C95-type ferrite cores due to very low losses and almost noiseless operation. An application of the nanocrystalline material as a core is an alternative solution because the mass of the transformer will be significantly reduced maintaining low losses and an acceptable level of the noise around the transformer.

DOI:10.12693/APhysPolA.135.95
PACS numbers: 61.05.Qr, 75.50.Bb, 75.50.Tt, 85.70.-w