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Analysis of a PM Motor Drive System by a Coupled Method with MATLAB and FEM
Ishikawa T.,Sunaga T.,Nakamura S.,Mori D.,Hashimoto S.,Matsunami M. The Korean Institute of Electrical Engineers 2005 KIEE International Transactions on Electrical Mach Vol.b5 No.3
Finite element method (FEM) is a very powerful tool for the calculation of magnetic field of electromagnetic devices. MATLAB/Simulink is also well known as a very useful tool for control systems. This paper proposes a very promising method, where the FEM is coupled with MATLAB. We apply this method to analyze a permanent magnet (PM) motor drive system, and compare with results using MATLAB only.
광전자 분석 실험을 이용한 $Ba(Fe_{1-x}Ru_x)_2As_2$ 물질의 전자구조분석
정원식,김용관,김범영,엄만진,김준성,김창영,Jung, W.S.,Kim, Y.K.,Kim, B.Y.,Matsunami, M.,Kimura, S.,Eom, M.J.,Kim, J.S.,Kim, C. 한국초전도학회 2011 Progress in superconductivity Vol.12 No.2
We performed angle resolved photoelectron spectroscopy (ARPES) studies on Ru doped $BaFe_2As_2$ with various Ru contents. Ru, which is doped into a parent compound $BaFe_2As_2$ and substitute Fe, does not donate or accept electrons. However, it induces superconductivity. From ARPES data along the high symmetry cuts and Fermi surface maps, we investigate the electron correlation and carrier density at the Fermi level. We observe that the Fermi velocity increases with Ru doping, suggesting reduction in electron correlation. In addition, we address issues on local vs. itinerant pictures for the magnetism in $BaFe_2As_2$.