Grain-oriented (GO) Fe-Si sheets are often preferred to non-oriented steels in large rotating machines, where the material response along different di- rections from the rolling one (RD) matters, both in terms of magnetisation curve and energy losses. The experiments show that the material properties depend in a complex fashion on the angle θ made by the applied field with respect to RD in the lamination plane, an effect that can be quantitatively interpreted in terms of evolution of the domain wall processes. It was shown that the pre-emptive knowledge of the material behaviour along RD (θ = 0◦) and the transverse direction (TD, θ = 90◦), allows one to predict, un- der quasi-static excitation, the normal magnetisation curve, the hysteresis loop shape, and the energy loss dependence on θ in high-permeability GO sheets. The evolution of the quasi-static magnetic properties with θ has an obvious counterpart in the dynamic behaviour. In the present work we have therefore investigated, from the experimental and theoretical viewpoint, the behaviour of the magnetic energy loss W (f, Jp) versus frequency (1 Hz ≤ f ≤ 200 Hz) and peak polarisation (0.15 T ≤ Jp ≤ 1.6 T) in high-permeability 0.29 mm thick GO Epstein samples, cut at 15◦ steps between RD and TD. We show that the predicting method developed for the quasi-static loss can be made general through loss decomposition and applied, in particular, to the determination of the excess loss term. This leads to a general description of W(f,Jp) as a function of the sheet cutting angle, without using arbitrary parameters.

Static and dynamic energy losses along different directions in GO steel sheets / Appino, Carlo; Ferrara, Enzo; Fiorillo, Fausto; Ragusa, Carlo; de la Barrière, Olivier. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 500:(2020), p. 166281. [10.1016/j.jmmm.2019.166281]

Static and dynamic energy losses along different directions in GO steel sheets

Carlo Appino
Membro del Collaboration Group
;
Enzo Ferrara
Membro del Collaboration Group
;
2020

Abstract

Grain-oriented (GO) Fe-Si sheets are often preferred to non-oriented steels in large rotating machines, where the material response along different di- rections from the rolling one (RD) matters, both in terms of magnetisation curve and energy losses. The experiments show that the material properties depend in a complex fashion on the angle θ made by the applied field with respect to RD in the lamination plane, an effect that can be quantitatively interpreted in terms of evolution of the domain wall processes. It was shown that the pre-emptive knowledge of the material behaviour along RD (θ = 0◦) and the transverse direction (TD, θ = 90◦), allows one to predict, un- der quasi-static excitation, the normal magnetisation curve, the hysteresis loop shape, and the energy loss dependence on θ in high-permeability GO sheets. The evolution of the quasi-static magnetic properties with θ has an obvious counterpart in the dynamic behaviour. In the present work we have therefore investigated, from the experimental and theoretical viewpoint, the behaviour of the magnetic energy loss W (f, Jp) versus frequency (1 Hz ≤ f ≤ 200 Hz) and peak polarisation (0.15 T ≤ Jp ≤ 1.6 T) in high-permeability 0.29 mm thick GO Epstein samples, cut at 15◦ steps between RD and TD. We show that the predicting method developed for the quasi-static loss can be made general through loss decomposition and applied, in particular, to the determination of the excess loss term. This leads to a general description of W(f,Jp) as a function of the sheet cutting angle, without using arbitrary parameters.
File in questo prodotto:
File Dimensione Formato  
2019 72 AppFerFioRagBar JMMM.pdf

solo utenti autorizzati

Tipologia: Versione editoriale
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 4.81 MB
Formato Adobe PDF
4.81 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
J. Magn.Magn. Mater., 500 (2020)_preprint.pdf

accesso aperto

Tipologia: Documento in Pre-print
Licenza: Pubblico - Tutti i diritti riservati
Dimensione 1.39 MB
Formato Adobe PDF
1.39 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/61567
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 5
social impact