• Title/Summary/Keyword: H.W.O.S.T

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A study on the effect of alumina coating on NiO dissolution in molten carbonate fuel cell (용융탄산염형 연료전지의 NiO 공기극의 용해거동에 미치는 알루미나 코팅효과에 대한 연구)

  • Ryu B. H.;Yoon S. P.;Han J;Nam S. W.;lim T.-H.;Hong S.-A.
    • New & Renewable Energy
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    • v.1 no.1 s.1
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    • pp.64-71
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    • 2005

  • The stability of alumina-coated NiO cathodes was studied in $Li_{0.62}/K_{0.38}$ molten carbonate electrolyte. Alumina was effectively coated on the porous Ni plate using galvanostatic pulse plating method. The deposition mechanism of alumina was governed by the concentration of hydroixde ions near the working electrode, which was controlled by the temperature of bath solution. Alumina-coated NiO cathodes were formed to $A1_2O_3-NiO$ solid solution by the oxidation process and their Ni solubilities were were than that of NiO up to the immersion time of 100h. However, their Ni solubilities increased and were similar to that of the bare NiO cathode after 100h. It was because aluminum into the solid solution was segregated to $\alpha-LiAlO_2$ on the NiO and its Product did not Play a role of the Physical barrier against NiO dissolution.

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Linkage control system design combined MCU (MCU 통합 연동 제어시스템 설계)

  • Ha, T.J.;Park, J.M.;Cho, K.O.
    • Smart Media Journal
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    • v.1 no.1
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    • pp.58-63
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    • 2012

  • It is a superordinate concept to a network control system which optimally distributes the battery power to overall length parts through the linkage control drive and absorbs/integrates network diagnostics and overlapped functions with overall length control systems. This study is to develop a system that maximize the battery power and motor effectiveness by controlling motor battery controlling module with common MCU Integration linkage controlling system, and to develop S/W and H/W that can be controlled by linked with each controlling module in CAN method through using Autosar's standardized software.

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Development of On-tine Partial Discharge Monitoring System for High-Voltage Motor Stator Windings (고압 전동기 고정자 권선의 운전중 절연감시 시스템 개발)

  • Hwang, D.H.;Sim, W.Y.;Park, D.Y.;Gang, Dong-Sik;Kim, Y.J.;Song, S.O.;Kim, H.D.
    • Proceedings of the KIEE Conference
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    • 2001.11a
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    • pp.224-226
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    • 2001

  • In this paper, a novel high-voltage motor monitoring system (HVMMS) is proposed. This system monitors the insulation condition of the stator winding by on-line measurements of partial discharge (PD). Sensor, EMC (Epoxy-Mica Coupler) is used for PD measurement PD signals are continuously measured and digitized with a peak-hold A/D converter to build the database of the high-voltage motor's insulation condition. Also, this system can communicate with the central monitoring system via RS-485. This helps more efficient operation and maintenance of the generator.

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Characteristics of Short-Circuit Protector in Pad-Mounted Transformer (지상변압기의 단락보호장치 특성연구)

  • Kim, K.H.;Lee, W.Y.;Sun, C.H.;Kim, D.M.;Kim, S.J.
    • Proceedings of the KIEE Conference
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    • 1995.07c
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    • pp.1350-1352
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    • 1995

  • This paper discribed the characteristic of I-t cross-over-point between current limited-fuse and explusion fuse(Bay-O-Net Fuse) and fuse protection in pad-mounted transformer that was generated internal faults and the short circuit of secondary side(load side). In the I-t cross-over-point, current limited fuse was melted when transient recovery voltage was raised rapidly.

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