http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
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.
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.
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.
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.
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.
태권도 지도자와 수련생간의 대인관계형성과 소비행위에 관한 연구
이봉(Yi Bong),정호원(Jeong Ho-Won) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.3
The purpose of this paper was to examine the impact of trainee-instructor relationships on trainee's satisfaction and intention of word-of-mouth. The author found that there were three different dimensions of interpersonal relationships(connective, understanding and respect) between trainee and instructor. It is suggested that developing interpersonal relationships lead to high level of customer satisfaction. Futhermore, high level of customer satisfaction leads to positive word-of mouth. These findings are extending the idea of relational marketing to Taekwondon service and emphasizing the importance of interpersonal relationship between trainee and instructor for commercial exchange. Marketing implications of these findings are discussed.
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.