Estimation of iron loss distribution by image Helmholtz equation method

Author

Endo, H. ; Hayano, S. ; Mogi, H. ; Fujikura, M. ; Kaido, C. ; Saito, Y.

Author_Institution

Graduate Sch. of Eng., Hosei Univ., Tokyo, Japan

Volume

39

Issue

3

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1377

Lastpage

1380

Abstract

This paper proposes the image Helmholtz equation method to visualize iron loss distribution of magnetic materials. The Helmholtz-type equations carry out dynamic image analysis of a series of distinct magnetized domain images. The domain images derive the state transition matrices of which imaginary parts correspond to the phase lag components of magnetization. In the present paper, iron loss distribution of a grain-oriented electrical steel is studied by utilizing its scanning electron microscope (SEM) images. The result of analysis visualizes iron loss generating parts reflecting on the magnetic domains. Moreover, the solution of image Helmholtz equation demonstrates computing magnetization curves, which agree well with the experimental result.

Keywords

Helmholtz equations; ferromagnetic materials; iron alloys; magnetic domains; magnetic leakage; scanning electron microscopy; silicon alloys; FeSi; dynamic image analysis; grain-oriented electrical steel; image Helmholtz equation method; iron loss distribution; magnetic domains; magnetization curves; phase lag components; scanning electron microscope; state transition matrices; Equations; Image analysis; Iron; Magnetic domains; Magnetic losses; Magnetic materials; Magnetization; Scanning electron microscopy; Steel; Visualization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.810159

Filename

1198478