http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
무변압기형 태양광 인버터의 출력 전류 DC offset 제거 방법
홍기남,최익,최주엽,이상철,이동하,Hong, Ki-Nam,Choy, Ick,Choi, Ju-Yeop,Lee, Sang-Chul,Lee, Dong-Ha 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.suppl3
Since PV PCS uses output current sensor for ac output current control, the sensor's sensing value includes unnecessary offset inevitably. If PV inverter is controlled by the included offset value, it's output current will generate DC offset. The DC offset of output current for trans-less PV inverter is fatal to grid, which results in saturating grid side transformer. Usually DSP controller of PV inverter reads several times sensing value during initial operation and, finally, it's average value is used for offset calibration. However, if temperature changes, the offset changes, too. And also, the switch device is not ideal, both each switching element of the voltage drop difference and on & off time delay difference generate DC offset. Thus, to compensate for deadtime and the switch voltage drop, feedback control by output current DC offset should be provided to compensate additional distortion of the output current. The validity of the proposed method is confirmed through PSIM simulation.
홍기남 ( Ki Nam Hong ),한상훈 ( Sang Hun Han ),박재규 ( Jae Kyu Park ),정규산 ( Kyu San Jung ),김성보 ( Sung Bo Kim ) 충북대학교 건설기술연구소 2014 建設技術論文集 Vol.33 No.1
본 논문은 개발된 케미컬 앵커 기초 시스템(CAFS)의 인발 성능을 제시한다. CAFS의 내력을 조사하기 위하여 10개의 케미컬 앵커 실험체들에 대해 인발실험들이 수행되어졌다. 실험변수로서 케미컬 앵커의 직경과 매립깊이가 선택되어졌다. 추가적으로 콘크리트 기초의 내력이 CAFS의 내력과 비교하기 위하여 마찬가지로 조사되었다. 콘크리트 기초와 CAFS의 최대인발하중은 각각 3.5 kN과 5.6에서 47.1 kN까지 이었다. CAFS의 내력은 콘크리트 기초의 내력보다 적어도 1.7배 이었다. 실험결과로부터 CAFS가 콘크리트 기초보다 높은 인발내력을 가질 수 있음을 확인할 수 있었다. This paper presents pullout performance of chemical anchor foundation system (CAFS) which was invented in this study. In order to investigate the capacity of CAFS, pullout tests were performed 10 CAFS specimens. As test variable, diameter and embedment length of chemical anchor were selected. In addition, the capacity of concrete foundation was also investigated to compare with that of CAFS. The maximum pullout loads of concrete foundation and CAFS were a 32 kN and from 5.6 to 47.1 kN, respectively. The capacity of CAFS was at least 1.7 times of that of concrete foundation. From the test results, it should be mentioned that CAFS have higher pullout capacity than concrete foundation.\
수용성 유황 첨가 콘크리트의 역학 특성 및 탄산화 저항성
홍기남 ( Ki Nam Hong ),지세영 ( Se Young Ji ),박재규 ( Jae Kyu Park ),정규산 ( Kyu San Jung ),한상훈 ( Sang Hoon Han ) 한국안전학회(구 한국산업안전학회) 2014 한국안전학회지 Vol.29 No.4
In this study, two types of water-soluble sulfur, LSA and LSB, were developed and the influence of the water-soluble sulfuron the mechanical properties and durability of concrete were experimentally evaluated. In order to evaluate mechanical properties andcarbonation resistance of concrete with water-soluble sulfur, compressive strength test, flexural strength test, bonding strength test, andcarbonation resistance test were performed. Compressive strength of only concrete with 1% LSA was increased while that of concretewith LSB was proportionally increased with the higher LSB dosage. On the other hand, flexural strength of concrete with LSA and LSBwas increased by 12-41% and 36-74%, respectively. Carbonation resistance of concrete with water-soluble sulfur were increased by25-66%. As a result, it should be noted that the water-soluble sulfur can not only solve the demerit of sulfur concrete but also offer thedurability of sulfur concrete.
조직이론의 관점에서 본 오피스 공간 계획유형에 관한 기초연구
홍기남(Hong Ki-nam),이승조(Lee Seung-jo),최왕돈(Choi Wang-don) 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
This study aimed to understand changing of work organization on variation of social organization and research typological classification of office layout based on preceded understanding. Buildings result from social needs and accommodate a variety of functions-economic, social, political, religious and cultural. Therefore, We can explain historical development of the constructing a building we understand the society and studying. After The modem age, it select a three buildings that there is an historical value of office Layouts planning and comprehend that make use sampling type of office work structure, studies a felicitous Typological classification of office Layouts. They find the development direction of a hereafter office of the task organization out according to it. And we suggest that Typological classification of Office Layouts based on Organization Theories.
고강도 재료를 활용한 횡구속 콘크리트의 국소변형률 측정
홍기남 ( Hong Ki-nam ),이수규 ( Lee Sugyu ),강판승 ( Kang Panseung ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
This study presents a technique for measuring the local strain of RC columns using high strength materials. A acrylic rod with strain gauges at intervals of 5 mm were embedded in high-strength RC columns. Under uniaxial compression loading, the local strain of the column was measured with strain gauges attached to the acrylic rod. It was confirmed from experimental results that the technique applied in this study is very effective in measuring the local strain of high-strength RC columns and the compressive failure of the high-strength RC columns is concentrated in some local regions.