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http://dx.doi.org/10.4283/JKMS.2005.15.6.320

Study on the Core Loss Improvement of SiFe Plate in Relation with Laser Pulse Width in the Laser Scribing  

Ahn, Seung-Joon (Department of Physics & Advanced Materials Science, Sunmoon University)
Park, Chul-Geun (Division of Information and Communication Engineering, Sunmoon University)
Ahn, Seong-Joon (Division of Information and Communication Engineering, Sunmoon University)
Publication Information
Journal of the Korean Magnetics Society / v.15, no.6, 2005 , pp. 320-324 More about this Journal
Abstract
The core loss of $3\%$ SiFe is strongly dependent on silicon content, impurities, permeability, and domain structure of the SiFe. Domain refining has been proved to be very good method for reduction of core loss in high permeability grain oriented SiFe, and laser scribing is well-blown as an effective and industrially important method of domain refinement. In this work, magnetic domain refinement has been carried out by using a pulsed Nd : YAG laser, and the core losses have been measured and analyzed to and optimal parameters of the laser treatment. The laser hem was focused with a spot size of $100{\mu}m$ and pulse energy of 10${\~}$35mJ and the lines were scribed with a period of ${\~}$5mm. The core loss was improved up to $17\%$ with 30 ns-Nd : YAG laser beam in $3\%$ SiFe.
Keywords
laser scribing; pulsed Nd : YAG laser; pulse width dependence; core loss; magnetic domain refinement; tensile stress;
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