http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
판토그래프와 전차선 사이에서 발생되는 아크 특성에 관한 연구
이봉이(Bong-Yi Lee),김재철(Jae-Chul Kim),한성호(Sung-Ho Han),이수길(Su-Gil Lee) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.11월
Electric train is currently used widely, and much development is expected. But, in case of electric train, as comparison with diesel rolling stock, many electrical problem such as harmonic, voltage sag, EMI, EMC usually occur. Accordingly, in order to popularize an electric train, first, a study on electrical problem at an electric train must be accomplished. In this paper, one of electrical problems, arc characteristics according to loss of contact between pantograph and catenary was analyzed.
절연구간에서의 전력품질 문제가 전기철도에 미치는 영향에 관한 연구
이봉이(Bong-Yi Lee),김재철(Jae-Chul Kim),문종필(Jong-Fil Moon) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.5월
In this paper, when electric train is in dead-section the effect on electric train system was dealt. The feeding system of electrical railway is AC or DC. When the electric train is passed AC feeding system to DC, vice versa or phase is changed in between AC feeding systems, there is a dead section. A dead section usually makes the electrical system complex and may have an adverse effect on the electrical system inside the train. Accordingly, it is important to analyze the effect on trains in dead-section. Modeling an electric train and simulation using PSCAD/EMTDC was accomplished to analyze how power quality problem such as inverter switching surge is propagated to electric train through the feeding line, railway, pantograph.
전력계통의 전력품질 외란을 고려한 플리커 평가에 관한 연구
정승복(Seung-Bock Jung),김재철(Jae-Chul Kim),이봉이(Bong-Yi Lee),조현경(Hyun-Kyung Cho) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.5월
This paper studies flicker evaluation considering power quality disturbance. A flicker problem with light device irritates human"s eyes. Also, the flicker problem has an fluence on adverse effect such as rolling device and rotating device. However, a study of flicker evaluation is not complete. A flicker is measured and evaluated at monitoring point. But, we consider power quality disturbances such as voltage sag and transient that cause fault and inverter/breaker switching. Power quality disturbances affects flicker evaluation. A flicker evaluation index increases. Therefore, we consider power quality disturbances. We detect voltage sag and transient using wavelet and evaluate flicker without flicker index including power quality disturbances.
정승복(Seung-Bock Jung),김재철(Jae-Chul Kim),이봉이(Bong-Yi Lee) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
This paper studies protective coordination of utility interconnected multiple distributed generations(DG). The study of protective coordination interconnected DG has been conducted. A protective coordination of utility disturbed by reverse current of DG. Therefore, A protective device is not operate when reverse current flows In this paper, we use phase difference between Ⅴ and Ⅰ. Also, we studied protective coordination algorithm of utility interconnected multiple DG.
윤승훈(Seung-hoon Yoon),이상선(Sang-seon Lee),박경훈(Kyung-hoon Park),이봉이(Bong-yi Lee),김대기(Dae-gee Kim),박완기(Wan-ki Park) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Oil resource exhaustion and oil price rise require alternative energy source for automotive vehicles. One of these alternatives are Hybrid Electric Vehicle(HEV). The main energy transferring path of these vehicle is high voltage electric cable system which requires quite different properties from conventional low voltage electric cable system for automotive. We have developed high voltage cable system for HEV applying shielded cable. This paper handles various issues of high voltage cable systems especially in view point of cable design, specification, material as conductor and compound. The cable properties of withstand voltage, flame-retardancy, abrasion resistance, withstand low-temperature and heat-ageing were tested. The test method of cable flexibility is developed and test results show excellent flexibility. EMC test were performed under SAE J551-5, MIL C85485/6 and CISPR PUB 12 standards. The shield-efficiency was investigated with the different braided densities and showed that minimum density should be 70%. Also, temperature-rising test at 80℃ surrounding condition and short-term excess-current test was performed to see the cable sustainability under extraordinary operating consideration.
PHSA 방법을 적용한 HEV 차량용 파워케이블의 Screening Attenuation에 대한 종단 부하의 영향 분석 및 정량화
안종태(Jongtae Ahn),최연무(Yeonmoo Choi),아비드(Abid Mustaq),황보천(Cheon Hwangbo),젱밍(Zeng Ming),박재홍(Jaehong Park),박완기(Wan-ki Park),김대기(Dae-ki Kim),이봉이(Bong-Yi Lee) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
케이블의 종단 저항이 변하게 되면 발생하는 노이즈의 특성이 달라지기 때문에 같은 케이블의 차폐 효율도 다른 경향이 나타난다. HEV 차량용 3상 파워케이블의 종단 저항은 케이블의 종단에 연결되는 단품의 종류에 따라 달라지기 때문에 종단 저항의 변화에 따른 차폐 효율의 영향을 분석하는 것은 불가피한 일이다. 본 논문에서는 PHSA 방법을 기본으로 하여 HEV 차량의 3상 파워케이블에 대한 차폐 효율 측정에 있어 종단 저항이 미치는 영향을 분석하였다. HEV 차량에서 3상 파워케이블의 종단 저항이 되는 모터의 임피던스를 실측을 통해 파악하고, 이를 바탕으로 종단 저항의 동적 범위를 설정하였다. 동적 범위 내에서 종단 저항에 따라 차폐 효율을 측정하고 차폐 효율이 30㎑ ~ 3GH의 측정 영역에서 5㏈ 이내의 차이를 보이는 부분을 분류하여 종단 저항의 동적 범위를 세 부분으로 나누고 각 영역의 대표 측정지점을 제시하였다. HEV 차량의 3상 파워케이블에 대한 차폐 효율을 실차환경을 바탕으로 올바르게 측정하기 위하여 주요 파라미터가 되는 종단 저항의 영향을 분석하였고 제시된 PHSA 방법에서 3상 파워케이블의 차폐 효율 실험 세팅방법에서 종단 저항의 파라미터 값을 ① 2Ω, 4μH, ② 100Ω, 22μH, ③ 1㏁, 2mH로 정량화하였다.
어린이 여가활동으로서 태권도재미가 수련몰입 및 지속의도에 미치는 영향
이봉(Bong Yi) 한국여가레크리에이션학회 2010 한국여가레크리에이션학회지 Vol.34 No.4
The purpose of this study was to examined how the taekwondo enjoyment of adolescent taekwondo practitioners affects exercise flow and exercise adherence intent and also to examine how the taekwondo enjoyment using exercise flow as a medium affects exercise adherence intent. The respondents of the present research consisted of elementary school children between 4 and 6 grader practicing taekwondo in Seoul and Gyeonggi province and it employed the convenience sampling method and makes a use of 274 for the final analyses. As the methods of research, taekwondo enjoyment, Exercise Flow and Exercise Adherence Intent scales were used for the questionnaire. For the statistical analyses, factor analysis, Confirmatory factor analysis(CFA), Structure Equation Modeling were utilized with the help of the Spss 18.01 and LISREL 8.53 program. The findings of the present study are as follows: First, taekwondo enjoyment and its benefits show direct positive effect on the action flow and cognition flow of exercise flow. Second, the perception of competence of taekwondo enjoyment demonstrates direct positive effect on the cognition flow of exercise flow. Finally, the action flow and cognition flow of exercise flow indicate direct positive effect on exercise adherence intent. In short, the action flow act as an intermediary for exercise and its benefits and exercise adherence intent, and the cognition flow is proved to be a medium for exercise and its benefits and the perception of competence and exercise adherence intent.
이봉(Yi Bong) 한국스포츠산업경영학회 2003 한국스포츠산업경영학회지 Vol.8 No.1
본 연구는 남북태권도교류의 일환으로 실행된 2002년 9. 10월의 시범단 교류사업의 사례에서 나타난 성과와 한계점들을 평가 분석하고 향후의 추진과제를 제시하고자 하는 데 목적이 있다. 연구결과 지금까지의 남북태권도교류관련 선행 연구들이 제기한 학술적 논의와 실제 교류현장의 괴리현상을 일부 발견하였다. 남북태권도교류에 관한 남측의 추진전략은 북측의 일방적 협상전략에 의해 무력할 수밖에 없는 한계를 보였으며, 태권도를 민족의 문화자산으로 선전하고 있는 남북의 공동인식에도 불구하고 남북태권도교류사업은 정치적 이해관계에 예속될 수밖에 없다고 판단된다. 그럼에도 불구하고 남북의 동포들은 태권도시범행사에서 태권도의 우수성에 열광하였으며 민족의 화해 분위기조성과 동질성 회복에 태권도가 기여할 수 있음을 확인할 수 있었다. 따라서 남북태권도교류의 지속적인 확대추진을 위해서는 시범단 교류사업의 성과와 도출된 과제에 대한 실전적 접근 노력이 필요할 것이다. The present study assesses and analyses a series of Taekwondo demonstrations held between the months of September and October in 2002 as a result of the decision to exchange Taekwondo between South and North Korea. This study is to discuss the achievements made out of the exchange, including its limitations, and to make suggestions for its future course. Consequently, there is a big difference between what was discussed and proposed in previous research on the exchange plan between the South and the North and what actually took place when the demonstrations were held. The original plan of the South become helpless in the face of North Korea's one-way negotiation strategy. Even though both countries recognize that Taekwondo is the foremost cultural asset of the Korean race, the exchange plan has failed to overcome their different political and ideological differences. However, spectators of the two countries viewing the demonstrations were very enthusiastic about the greatness of Taekwondo. and the exchange program surely contributed to the reconciliatory mood of the two opposing nations and to the awareness of homogeneity of the Korean race. Finally, in order to continue and develop the exchange programs to a greater extent, there have to be more concrete and pragmatic approaches to what they want to achieve and to how they should overcome their differences.