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신경망을 이용한 쾌적감성과 물리적 환경요소의 구조 분석
최주엽 ( Ju Yeop Choi ),최익 ( Ick Choy ),김진성 ( Jin Sung Kim ),김규식 ( Kyu Sik Kim ),박정민 한국감성과학회 1999 추계학술대회 Vol.1999 No.-
현대인의 활동범위가 넓어지고 작업의 양이 많아지면서, 육체적·정신적 피로를 해결할 수 있는 쾌적환경에 대한 관심이 높아지고 있다. 쾌적감이란 인간이 쉽게 동조하고 물입할 수 있어서, 인간과 환경이 일체가 되기 쉬운 상태로서 이에 대한 연구가 활발히 진행되어오고 있다. 본 논문은 수학적으로 표현하기 어려운 인간의 쾌적감 요소이미지와 물리적 환경 요소의 구조 분석에 신경망 이론을 적용한다. 인간감성 모델과 역인간감성모델을 제안하여, 지능제어 이론인 신경망(Neural Network)이 쾌적감 요소이미지와 물리적 환경 요소의 구조 분석에 유용하게 사용될 수 있음을 보인다.
입력 커패시턴스를 포함한 PV Boost Converter 모델링
최주엽(Choi Ju-Yeop),이기옥(Lee Ki-Ok),최익(Choy Ick),송승호(Song Seung-Ho),유권종(Yu Gwon-Jong) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.5
Photovoltaic conditioning systems normally use a maximum power point tracking (MPPT) technique to deliver the highest possible power to the load continuously when variations occur in the insolation and temperature. A unique method of tracking the maximum power points (MPPs) and forcing the boost converter system to operate close to these points is presented through deriving small-signal model and transfer function of boost converter considering input capacitor. This paper aims at modeling boost converter including fairly large equivalent series resistance(ESR) of input reservoir capacitor by state-space-averaging method and PWM switch model. In the future, properly designed controller for compensation will be constructed in 3kw real system for maximum photovoltaic power tracking control.
최주엽(Ju-Yeop Choi),오영은(Young-Eun Oh),전호석(Ho-Seok Jeon),송증호(Joong-Ho Song),최익(Ick Choy) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
This paper aims at developing remote contro system to control and monitor distributed various devices through internet or information communica-tion network SNMP (Simple Network Manage-ment Protocol) and rectifier operated in a row are adopted for network management protocol and applied device, respectively, For controlling and monitoring distributed devices in real-time java-environment software is constructed. Also general-use interface controller between network devIce and applied device is proposed. Finally, seria communication such as RS-232 and RS-485 is used between controller and applied device.
커폐시턴스 내부저항을 고려한 태양광용 Boost 컨버터에 관한 MPPT 제어 알고리듬 고찰
최주엽(J. Y. Choi),유권종(G. J. Yu),이동기(D. G. Lee),이기옥(K. O. Lee),정영석(Y. S. Jung),김기현(K. H. Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-
Photovoltaic systems normally use a maximum power point tracking (MPPT) technique to continuously deliver the highest possible power to the load when variations in the insolation and temperature occur A simple method of tracking the maximum power points (MPPs) and forcing the boost converter system to operate close to these points is presented through denying small-signal model and transfer function of boost converter This paper aims at modeling boost converter including equivalent series resistance of imput reservoir capacitor by state-space-averaging method. In the future, properly designed controller for compensation will be constructed for maximum photovoltaic power tracking control.<br/> <br/>
최주엽(Choi, Ju-Yeop),유권종(You, Gwon-Jon),정영석(Jeong, Young-Seok),소정훈(So, Jeong-Hoon),최익(Choy, Ick) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
This paper proposes an inverter for the grid-connected photovoltaic system based on the transformer-less inverter. This system consists of a high frequency converter bridge, high frequency transformer, diode bridge rectifiers, a DC filter, a low frequency inverter bridge, and an AC filter. The high frequency converter bridge switching at 20kHz is used to generate bipolar PWM pulse, and the high frequency transformer raise its voltage twice, which is subsequently rectified by diode bridge rectifiers to result in a full-wave rectified sine wave. Finally, it is unfolded by a low frequency inverter bridge to result in a 60Hz sine wave power output. Even though the high frequency link system needs more power semiconductors, a reduced size, light weight, and saved parts cost make this system more comparative than the other systems due to elimination of 60Hz transformer.