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구성영(S. Y. Koo),박정우(J. W. Park),이기욱(K. W. Lee),김동욱(D. W. Kim) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
본 논문에서는 2.5㎿급 풍력터빈에 적용된 이중여자 권선형 유도발전기 제어를 위한 풍력발전시스템의 핵심요소인 전력변환장치 제작기술과 풍력발전시스템 제어를 위한 요소기술에 대해 기술한다. 2.5㎿급 풍력터빈을 계통연계하기 위해서는 풍력제어기와 컨버터를 설계하고 상호 인터페이스등을 고려하여 적절한 풍속 조건에서 계통측에 발전전력을 전달하여야 한다. 또한, 최근 계통 사업자측에서 요구하는 Grid-code에 대응하기 위한 제어알고리즘을 설계하여야 하고, 타워의 진동억제를 위한 축진동 억제 알고리즘 등을 추가로 전력변환장치에 적용하여야 한다. 따라서 본 논문에서는 2.5㎿급 풍력터빈용 PCS개발을 위한 각종 제어알고리즘과 H/W설계기술에 대해서 기술한다.
최병오(B.O. Choi),이기욱(K.W. Lee),박종원(J.W. Park) 유공압건설기계학회 2014 유공압건설기계학회 학술대회논문집 Vol.2014 No.4
The components of vehicles, aircraft, ships, agricultural machinery, transportation machinery, and various mechanical structures are subjected to the number of limitations in the environmental test conditions and test costs for realizing actual field condition. Therefore, hybrid dynamometer test System for reproduction of combined environment, which can provide a test environment such as the actual operating conditions, has an economic advantage and very convenient to design optimization and evaluation for newly developed products. In this study, we studied on designing and realizing the hybrid dynamometer test System for reproduction of combined environment which can simulate the vehicle outside environmental factors such as high temperature, low temperature, humidity, salt, thermal shock, random vibration, mechanical shock and so on. The actual field operating condition can be reproduced by the integrated simultaneous control system for hydraulic actuators, hybrid dynamometer and environmental chamber in the developed testing system. The developed hybrid dynamometer test System for reproduction of combined environment can be used to analyze root cause for field failure mechanism which was hardly found in the existing test system. We also expect that the developed testing system is able to contribute for improving the reliability growth of the power train component in transportation system.
박종원(J. W. Park),이기욱(K. W. Lee),김형의(H. E. Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
A hydraulic breaker for construction machinery generally used for the destroying and disassembling of buildings, crashing road pavement, breaking rocks at quarry and so on. So the measurement of the impact energy of a hydraulic breaker is very important thing to prove its capability to manufacturers and customers. But the measurement system of breaker impact energy is difficult to construct for small and medium size breaker manufacturers, because of its complicated measuring equipment. Therefore the prediction of impact energy in design process is very helpful to the most of breaker manufacturers. In this study, we carried on modeling and simulation of a hydraulic breaker to predict impact energy via commercial CAE software. The modeling and simulation of a hydraulic breaker was achieved with two parts. One is a hydraulic circuit analysis part via AMESim and the other is impact strain analysis part via ANSYS. The predicted impact energy was compared with the experimental one.