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김두연(Dooyeon Kim),이우식(Woosik Lee),이시엽(Siyup Lee),주성권(Seongkweon Joo),이명국(Myungkug Lee),전용(Yong Chun) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The Element who is a environmental contamination and an automobile fuel efficiency improvement the automobile lightweight is to in the process of advancing. Generally, Knuckle and Carrier in Motors are in used ductile cast iron. In case of Cast Iron, the weight is significantly heavy. Heavy weight make against good fuel efficiency, comfortable to ride and so on. The overseas’s Knuckle is executed a benchmarking evaluation in the object. It is used to high strength high elongation of ductile cast iron. So set the goal, physical properties and a lightweight 10% in knuckle. As chemical composition of cast iron are changed., we achieved our goal, material property.
김두연(Dooyeon Kim),김진호(Jinho Kim),이진식(Jinshik Lee),김연희(Yeon-Hee Kim),전영환(Yeong-Han Chun),강용철(Yong Cheol Kang) 대한전기학회 2013 전기학회논문지 Vol.62 No.7
In a conventional power system, the frequency is recovered to the nominal value by the inertial, primary, and secondary responses of the synchronous generators (SGs) after a large disturbance such as a generator tripping. For a power system with high wind penetration, the system inertia is significantly reduced due to the maximum power point tracking control based operation of the variable speed wind generators (WGs). This paper proposes a virtual inertial control for a wind power plant (WPP) based on the maximum rate of change of frequency to release more kinetic energy stored in the WGs. The performance of the proposed algorithm is investigated in a model system, which consists of a doubly fed induction generator-based WPP and SGs using an EMTP-RV simulator. The results indicate that the proposed algorithm can improve the frequency nadir after a generator tripping. In addition, the algorithm can lead the instant of a frequency rebound and help frequency recovery after the frequency rebound.
마그네슘 다이캐스팅 공법 적용 경량 카울크로스멤버 부품개발
김두연(Dooyeon Kim),김수상(Soosang Kim),박형상(Hyungsang Park),이우식(Woosik Lee),오제하(Jeha Oh),황종원(Jongwon Hwang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The Element who is a environmental contamination and an automobile fuel efficiency improvement the automobile lightweight is to in the process of advancing. The magnesium alloy from in the utility metal with the lightest metal in the lithosphere element is abundant at 6th and has the vibration which is excellent and a shocking absorbability and the subject matter quality of electromagnetic waves screening characteristic etc. The overseas’s various magnesium cross members are executed a benchmarking evaluation in the object. Set the goal, physical properties and a parts lightweight of above on equal level with aim, Applied AM60B magnesium alloy, at the first among nation the lightweight magnesium cowl cross member with die casting method developed. Crash test results were excellent. Development result, Accomplished a lightweight 30% and reduced parts.