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Design of a flyback transformer using a stress-annealed iron-based nanocrystalline alloy

Published online by Cambridge University Press:  06 June 2002

F. Costa ,
F. Alves ,
A. Benchabi ,
F. Simon  and
S. Lefèbvre
F. Costa
Affiliation:
Power Electronic research team, LESIR/SATIE, ESA 8029, ENS de Cachan, 61 avenue du Président Wilson, 94230 Cachan, France
F. Alves*
Affiliation:
Magnetic Materials research team, LESIR/SATIE, ESA 8029, ENS de Cachan, 61 avenue du Président Wilson, 94230 Cachan, France
A. Benchabi
Affiliation:
Magnetic Materials research team, LESIR/SATIE, ESA 8029, ENS de Cachan, 61 avenue du Président Wilson, 94230 Cachan, France
F. Simon
Affiliation:
Magnetic Materials research team, LESIR/SATIE, ESA 8029, ENS de Cachan, 61 avenue du Président Wilson, 94230 Cachan, France
S. Lefèbvre
Affiliation:
Power Electronic research team, LESIR/SATIE, ESA 8029, ENS de Cachan, 61 avenue du Président Wilson, 94230 Cachan, France
*
alves@lesir.ens-cachan.fr
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Abstract

This paper presents some results from experiments carried out on a flyback converter whose transformer has been built with a new stress-annealed nanocrystalline (iron-based) material developed by our laboratory team. This original process has provided a low value of relative permeability (around 200) at a high induction level, thereby making it possible to store large amounts of energy. A flyback transformer without air-gap was thus tested in order to evaluate the performance of this material, with highly satisfactory results being obtained. Because of the material's low magnetic losses at a high induction level and high-frequency switching (up to 25 kHz), low transformer losses along with a low temperature rise were observed. A figure of merit is proposed in order to situate our material performances among others.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 18 , Issue 3 , June 2002 , pp. 173 - 180
Copyright
© EDP Sciences, 2002

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References

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