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이상곤,김동성,황철승,조원철,이태식,Lee. Sang-Gon,Kim. Dong-Sung,Hwang. Cheol-Seung,Cho. Won-Cheol,Lee. Tae-Shik 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1
Due to the benefit of QRA(Quantitative Risk Analysis) method, we can evaluate the risk, and it helps us to make our safe. We also depend to some of correlation equations to assess the jet fire at high pressurized transmission line. However, we can evaluate the risk within limitations. After comparing the current model to investigation report of natural gas transmission line accident at EL-Paso in U.S., this study concludes that more research and study are required because currently developed model cannot expect factors of the fire risk such as flame configuration.
직접형 디지탈 주파수 합성기 동작 속도 향상을 위한 파이프라인형 위상누산기의 설계
이상곤,유흥균 ( Sang Gon Lee,Heung Gyoon Ryu ) 충북대학교 산업과학기술연구소 1994 산업과학기술연구 논문집 Vol.8 No.2
Abstract_Roman In this paper, we design the logic circuit of pipelined phase accumulator in DDFS(direct digital frequency synthesizer) with dynamic D F/F, and simulate it. The design methods of the adder and D F/F are described. To design and verify th
전기추진선박의 운전조건별 전력특성 및 추진전동기 특성 비교 해석
이상곤,정유석,정상용,이철균,Lee, Sang-Gon,Jeong, Yu-Seok,Jung, Sang-Yong,Lee, Cheol-Gyun 한국전기전자학회 2011 전기전자학회논문지 Vol.15 No.1
본 논문에서는 발전기, 스위치보드, VFD, 추진전동기 등으로 구성된 전기추전선박의 전력 네트워크를 모델링하고, 전력조류해석과 단락전류해석을 통하여 계절별 선박 운용에 따른 전력시스템 특성 해석 및 단락사고 발생 시차단기의 용량을 선정한다. 이와 더불어 3.7MW급 유도전동기 및 영구자석형 동기전동기의 정성적, 정량적 비교 해석을 통해 전기선박 추진전동기로 적합성에 대해 추가 고찰한다. This paper deals with the characteristic analysis of the integrated power system applied for the electric propulsion ships. This includes the electric power system modeling which is accomplished with the electric power network mainly composed of generators, switchboards, variable frequency devices, electric motors, and etc. In addition, performance comparison between the permanent magnet synchronous motor (PMSM) and the induction motor (IM) for 3.7MW ship propulsion has been done. In order to investigated the main performance of propulsion motor, a coupled model taking into account torque density, copper loss, iron loss, efficiency, power factor, and torque ripple using finite element analysis (FEA) has been employed.