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해석적 방법에 의한 축방향 자속 영구자석형 풍력발전기의 인덕턴스 도출
박형일,장석명,정재훈,한철,최장영 대한전기학회 2012 대한전기학회 학술대회 논문집 Vol.2012 No.4
This paper deals with the inductance deduction of axial flux permanent magnet wind power generator based on electromagnetic field theory. On the basis of magnetic vector potential and polar-coordinate system, the magnetic field solutions due to stator winding current are obtained. In particular, the 3-D problem is solved by introducing a special function for the radial position. Besides, the analytical modeling of ring-wound winding which is has radially nonhomogeneous width in polar coordinate system is proposed.
박형일,이동근,정동재,손명범,박철호,김한수 대한화학회 2019 Bulletin of the Korean Chemical Society Vol.40 No.3
Real time dilation behaviors of a Si-Ti-Fe-Al alloy electrode adopting a poly (amide-imide) binder were investigated to understand the effects of thermal treatment temperature for PAI binder on the electrochemical performance of the Si-alloy electrode using an in-situ electrochemical dilatometer. In situ measurement of the electrode thickness showed that the changes in the volume of the Si electrode was suppressed by heat treatment greater than 300 °C, which well agreed with the improved cycle performance of the Si-alloy electrode thermally treated at the same temperature. Differential dilation plots of the Si-alloy electrodes were found to reveal more detailed changes in the volume of the Si-alloy electrode, thus showing that the enhanced mechanical strength of thermally treated PAI effectively could control the expansion and contraction of the Si-alloy electrode and ensuring a more stable cycle performance of the Si-alloy electrode.