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멀티 코어 DSP 기반 모터 드라이브 감시 시스템 개발
성용욱(Yong-Wook Sung),윤철(Chul Yoon),최준영(Joon-Young Choi) 한국정보기술학회 2023 한국정보기술학회논문지 Vol.21 No.2
In this paper, we develop a motor drive monitoring system composed of a motor drive manufactured based on TIs multi-core DSP and a management PC. Through high-speed Ethernet communication, the management PC sends control commands to the motor drive, and the motor drive sends drive state variables to the management PC to display on the PC window screen. The motor control program and Ethernet communication program are allocated and executed in the DSP core and ARM core, respectively. By using this multi-core structure, it does not affect the performance of the motor control loop operating at ultra-high speed, and at the same time enables real-time monitoring of motor drive state variables at the management PC through high-speed Ethernet communication. To verify the normal operation of the entire developed system, the speed control commands are sent from the management PC to the motor drive and the state variables of the motor drive are checked using the motor drive monitoring program at the management PC. The experimental results confirmed that the proposed system can control and monitor the motor drive without affecting the motor control algorithm.
이강훈(Kang hun Lee),한재영,김경택,도현선(hyun sun Do),성용욱(Yong Wook Sung),유상석(Sang Seok Yu) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.11
The fuel cells have been investigated in the applications of marine as the high efficient and eco-friendly power generating systems. In this study, modeling of Molten carbonate fuel cell with internal reformer has been developed to analyze the feasibility of thermal energy utilization for marine ship. The model is developed under Aspen plus<SUP>®</SUP> and used for the study of system performances over fuel type. The simulation results show that the efficiency of MCFC system based on LNG fuel is the highest. Also, it is verified that the steam reforming is suitable as pre-reforming for diesel fuel.
자동차용 PEMFC 전극 촉매의 열화 원인에 대한 연구
정종식(Chung, Jong-Shik),정철구(Chung, Chul-Goo),김림(Kim, Lim),성용욱(Sung, Yong-Wook) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
A long term deactivation study was carried out with commercial MEA provided by Hyundai Motor Co. The deactivation phenomena were observed only at high voltage region where there is no diffusion-limited reaction. A rapid deactivation was observed up to 40h owing to the sintering of Pt particles. This was followed a gradual increase in the activity up to 300 h, which is probably caused by improvement in the electrode properties in the presence of current during the reaction. After 300 h, monotonic decrease in the activity was observed owing to dissolution of Pt particles especially in the cathode. The presence oxygen is the cause of oxidation and dissolution of Pt. The dissolution rate can be somewhat retarded by generation of current, which reduces Pt ion back to Pt in the cathode.
5kW급 고체 산화물 연료전지 열관리 계통 LQR 상태 궤환 제어기 설계
정진희(Jin Hee Jeong),한재영(Jae Young Han),성용욱(Yong Wook Sung),유상석(Sang Seok Yu) 대한기계학회 2015 大韓機械學會論文集B Vol.39 No.6
고체 산화물 연료전지는 800~1000℃의 고온에서 작동한다. 고온 작동은 효율에 유리하지만 재료요구 조건, 신뢰성, 열팽창 문제 등이 발생하여 온도 제어가 중요하다. 본 연구에서는 연료전지 시스템의 열관리를 위한 상태 공간 제어기를 설계하고 응답 특성을 확인하였다. 연료전지 스택과 열관리 핵심부품인 촉매연소기는 집중 용량법을 이용한 과도 응답 모델을 개발하였고, 구성품과 통합하여 정적 운전 특성을 확인하였다. 개발된 비선형 시스템을 정격 운전 조건에서 다중 입력과 출력이 가능한 상태공간 식으로 선형화하였다. 부하에 따라 응답특성이 현저하게 달라지는 특성을 제어하기 위해 LQR 제어기를 설계하여 궤환 제어 시스템의 온도를 제어하였다. 상태 궤환 제어기가 적어도 두 개의 제어 게인을 가지고 운전 영역에 따른 응답을 보여줄 때, 원하는 온도 응답을 나타냄을 확인하였다. Solid oxide fuel cell operate at high temperature (800~1000℃). High temperature have an advantage of system efficiency, but a weak durability. In this study, linear state space controller is designed to handle the temperature of solid oxide fuel cell system for proper thermal management. System model is developed under simulink environment with Thermolib<SUP>®</SUP>. Since the thermally optimal system integration improves efficiency, very complicated thermal integration approach is selected for system integration. It shows that temperature response of fuel cell stack and catalytic burner are operated at severe non-linearity. To control non-linear temperature response of SOFC system, gain scheduled linear quadratic regulator is designed. Results shows that the temperature response of stack and catalytic burner follows the command over whole ranges of operations.