LUCIANO, B. A.; http://lattes.cnpq.br/2390722791029216; LUCIANO, Benedito Antonio.
Resumo:
The object of this thesis is to evaluate the performance of transformer cores designed and
built from the amorphous alloy FeygB^Siq. A simple transformer equivalent circuit is used
to carry out these investigations. The main focus is on the effect of the magnetic material on
the total loss on the excitation current. A finite difference method is used to help the design
of two single-phase transformer prototypes, with the following rated values: 100 VA and
1,0 kVA, 220V/T10V, 60 Hz. The as-cast material structure were examined using X-ray
diffractometer. These amorphous cores are annealed in an argon atmosphere, under a DC
magnetic field applied along the ribbon length for inducing uniaxial anisotropy. The
crystallization behaviour was examined by differential scanning calorimetry (DSC) and no
one crystallization was observed. The achieved results are compared with test data obtained
on two commercial silicon-steel transformers with the same rated values. It is shown
amorphous cores are more efficient than silicon-steel cores.
