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Nanosilver particles-based conductive patterns developed by direct soft imprint lithography
최준혁,S.W. Lee,K.D. Kim,D.G. Choi,J.H. Jeong,E.S. Lee 한국물리학회 2009 Current Applied Physics Vol.9 No.11
For the direct patterning of electronic device structures, the present work explored an idea of using UV imprint based on nanosilver particles-dispersed UV (ultraviolet) curable resin. In current work, asreceived Ag solution was applied to HEMA (hydroxyethyl methacrylate) as an ultraviolet (UV) curable precursor with the addition of photoinitiator (~3 wt%) to formulate electrically conductive resin mixtures with the Ag contents of 40–60 wt%. The UV exposed imprinted patterns with PDMS (polydimethylsiloxane) stamp become electrically conductive after properly optimized heat treatment. Those are, then, wetetched to remove imprint residue, which lead to the formation of the isolated current transfer media. This imprint scheme can contribute to substantially reduced process steps and corresponding costs associated with additional metal processes.
소형/고효율 고분자전해질 연료공급모듈용 Air Blower 개발에 관한 연구
최준혁(J.H. Choi),정인성(I.S. Jung),김주한(J.H. Kim),서정무(J.M. Seo),허진(J. Hur),성하경(H.G. Sung) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
Air Management System is composed by Pump, Fan, Compressor and Blower. In general their performances depend on the capability of the motor, power converter device and controller. Especially, it should be noticed upon designing Air Management System using for Fuel Cell System, that Pump, Fan, Compressor and Blower satisfy the condition of the high performance, high efficiency, high density and reasonable price considering the safety and Economic Efficiency. In order for this, it should be studied that which kind of Motor is the most suited for Air Management System for Fuel Cell, such as Induction Motor, Brushless DC Motor, and Switched Reluctance Motor which is widely using in industry. This paper presents the designing and manufacturing of Outer Rotor Type BLDC Motor and Driver for Air Blower of Air Management System. Experimental results from a laboratory prototype are presented to validate the feasibility of the proposed Air Blower Motor and Driver.
SRM 구동을 위한 Energy Efficient C-Dump 컨버터에 관한 연구
최준혁(J.H. Choi),윤용호(Y.H. Yoon),송병섭(B.S. Song),원충연(C.Y. Won),김규식(G.S. Kim),최세완(S.W. Choi) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-
This paper compared a Modified C-dump converter and energy efficient converter topologies, derived from the conventional C-dump converter, for switched reluctance motor (SRM) drives The proposed topologies overcome the limitations of the conventional C-dump converter, and could reduce the whole cost of the SRM drive. Also, the above converters have simple control requirements, and allow the motor phase current to free wheel during chopping mode. Specially, the voltage ratings of the dump capacitor and some of the switching devices in the proposed an Energy efficient C-dump converter is reduced to the supply voltage (V-dc) level compared to twice the supply voltage (2V-dc) in the conventional C-dump converter. Simulation and experimental results of the proposed converters are presented and verified.<br/> <br/>