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Nano-scale Inter-lamellar Structure of Metal Powder Composites for High Performance Power Inductor and Motor Applications

Journal of Magnetics, Volume 20, Number 2, 30 Jun 2015, Pages 138-147

Hakkwan Kim (Corporate R&D Institute, Samsung Electro-Mechanics), Sung Yong An *

(Corporate R&D Institute, Samsung Electro-Mechanics)

Abstract

The unique nano-scale inter-lamellar microstructure and unparalleled heat treatment process give our developed metal powder composite its outstanding magnetic property for power inductor & motor applications. Compared to the conventional polycrystalline Fe or amorphous Fe-Cr-Si-B alloys, our unique designed interlamellar microstructure strongly decreases the intra-particle eddy current loss at high frequencies by blocking the mutual eddy currents. The combination of optimum permeability, magnetic flux and extremely low core loss makes this powder composite suitable for high frequency applications well above 10 MHz. Moreover, it can be also possible to SMC core for high speed motor applications in order to increase the motor efficiency by decreasing the core loss.

Keywords: inter-lamella structure; magnetic composite; power inductor; core-loss; eddy current loss

DOI: http://dx.doi.org/10.4283/JMAG.2015.20.2.138

Full Text: PDF

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