We report and discuss significant results on the magnetic losses and their frequency dependence insoft magnetic composites. Two types of bonded Fe-based materials have been characterized atdifferent inductions from dc to 10 kHz and analyzed by extending the concept of loss separation and the related statistical theory to the case of heterogeneous materials. Starting from the experimental evidence of eddy current confinement inside the individual particles, the classical losscomponent is calculated for given particle size distribution. Taking then into account thecontribution of the experimentally determined quasistatic (hysteresis) loss, the excess losscomponent is obtained and quantitatively assessed. Its behavior shows that the dynamichomogenization of the magnetization process with frequency, a landmark feature of magnetic laminations, is restrained in these materials. This results into a partial offset of the loss advantage offered by the eddy current confinement.
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1 April 2011
PROCEEDINGS OF THE 55TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS
14-18 November 2010
Atlanta, Georgia
Research Article|
Magnetism and Magnetic Materials|
March 29 2011
Loss separation in soft magnetic composites
O. de la Barrière;
O. de la Barrière
a)
1
SATIE, ENS Cachan, CNRS, UniverSud
, 61 av du President Wilson, F-94230 Cachan, France
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C. Appino;
C. Appino
2
Istituto Nazionale di Ricerca Metrologica (INRIM)
, Strada delle Cacce 91, 10135 Torino, Italy
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F. Fiorillo;
F. Fiorillo
2
Istituto Nazionale di Ricerca Metrologica (INRIM)
, Strada delle Cacce 91, 10135 Torino, Italy
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C. Ragusa;
C. Ragusa
3
Dipartimento di Ingegneria Elettrica, Politecnico di Torino
, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
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H. Ben Ahmed;
H. Ben Ahmed
1
SATIE, ENS Cachan, CNRS, UniverSud
, 61 av du President Wilson, F-94230 Cachan, France
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M. Gabsi;
M. Gabsi
1
SATIE, ENS Cachan, CNRS, UniverSud
, 61 av du President Wilson, F-94230 Cachan, France
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F. Mazaleyrat;
F. Mazaleyrat
1
SATIE, ENS Cachan, CNRS, UniverSud
, 61 av du President Wilson, F-94230 Cachan, France
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M. LoBue
M. LoBue
1
SATIE, ENS Cachan, CNRS, UniverSud
, 61 av du President Wilson, F-94230 Cachan, France
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a)
Author to whom the correspondence should be addressed. Electronic mail: barriere@satie.ens-cachan.fr.
J. Appl. Phys. 109, 07A317 (2011)
Article history
Received:
September 28 2010
Accepted:
November 21 2010
Citation
O. de la Barrière, C. Appino, F. Fiorillo, C. Ragusa, H. Ben Ahmed, M. Gabsi, F. Mazaleyrat, M. LoBue; Loss separation in soft magnetic composites. J. Appl. Phys. 1 April 2011; 109 (7): 07A317. https://doi.org/10.1063/1.3554207
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