Investigation of core loss characteristics of 3% SiFe using the laser scribing method

Seungjoon Ahn, Dae Wook Kim, Ho Seob Kim, Kwang Hyun Baik, Seong Joon Ahn, Cheol Gi Kim

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The core loss of 3% SiFe is strongly dependent on silicon content, impurities, permeability, and domain structure of the SiFe. Domain refining has proved to be a very good method for the reduction of core loss in high-permeability grain-oriented SiFe, and laser scribing is well known as an effective and industrially important method of domain refinement. In this work, magnetic domain refinement was carried out using a pulsed and Q-switched Nd: YAG laser, and the core losses were measured and analysed to find the optimal parameters of the laser treatment. The laser beam was focused with a spot size of 0.2 mm and pulse energy of 15-30 mJ and the lines were scribed with a period of -5 mm. The core loss was improved by up to 18% in 3% SiFe using this method, and the loss was relatively insensitive to the optical energy of the Q-switched pulse.

Original languageEnglish
Pages (from-to)1641-1644
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume241
Issue number7
DOIs
StatePublished - Jun 2004

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