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송시우(Song, Shi-woo) 서강대학교 법학연구소 2014 서강법률논총 Vol.3 No.1
Park Geun-hye won the 18th presidential election, conducted on December 19th, 2012, by a majority of voters. This is the first time that the president-elect has won by a majority of voters at the Presidential Election since democratization of Korea in 1987. But we have to note that ‘a majority of voters’ doesn’t mean ‘a majority of electorate’. From this point, we need to define what ‘a majority’ really means. How to define ‘a majority’ influences directly on the final vote system, which is the main theme of this study. Though there is no explicit Constitutional provision about the final vote system, we can see that it has a significant importance if we consider the relation between the ballot system and the Presidential Election. First, this paper aims to study the real meaning of the final vote system and some countries that have adopted it. Secondly, this paper examines whether it is possible to adopt the final vote system in the Presidential Election in our country. Finally, it looks into what kind of problems will arise if the final vote system is adopted, and suggests a few solutions to deal with the problems.
IPMSM Spoke-Type BLDC의 모터 코깅토크 및 토크리플 저감을 위한 회전자 최적설계
신동윤(Dong Youn Shin),송시우(Si Woo Song),이승원(Seung Won Lee),김광수,김원호(Won Ho Kim) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.5
본 논문에서는 EPS용 IPMSM BLDC 전동기의 회전자 형상에 대해 연구하였으며, EPS용 모터의 특성상 진동 및 소음에 민감하고 이는 코깅토크 및 토크리플과 관련이 있다. 따라서 본 논문에서는 코깅토크 및 토크리플 저감을 위한 회전자 태퍼링 최적설계를 진행하였다. 연구의 타당성을 검증하기 위하여 자기등가회로(MEC: Method electric circuit)를 통하여 회전자 형상 및 자석 사이즈 최적 설계를 진행하였으며 유한요소해석(FEM: Finite Element Method)을 통하여 타당성을 검증하였다.