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정전압형 전자식 안정기 회로의 고조파 저감을 위한 PFC회로의 설계
이현무(H.M.Lee),고강훈(K.H.Koh),고희석(H.S.Koh),이현우(H.W.Lee) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-
In this paper, a PFC(Power Factor Correction) electronic ballast with constant voltage-fed is proposed. The proposed PFC electronic ballast is combined of a High-efficiency boost converter and a conventional half bridge inverter. It is proved that the ripple of input-current and the input-current"s harmonic of the proposed PFC electronic ballast are reduced using the voltage divider and soft-switching technique. It is demonstrated that simulation results for 40[W] fluorescent lamp correspond with theoretical analysis.
태양광 발전시스템의 부분그늘 보상을 위한 알고리즘에 관한 연구
고강훈(K.H.Koh),이현우(H.W.Lee),서기영(K.Y.Suh),고희석(H.S.Koh),문성찬(S.C.Moon) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.11
In this paper, compare and analyze existent MPPT algorithms Existent algorithms have defects which don't generate it in a partial shade or low insolation. Therefore, to supplement it, we design improved IncCond algorithm consisted of a Aux. switch and capacitor with Generation Control circuit which can always obtain maximum generation power at the factor which is reduced generational efficiency by<br/> partial shade. Generation Control circuit is<br/> method which can always get maximum output power as it regularly controls each voltage of serial connected solar cell. Accordingly, it can improve efficiency and confidence of utility interaction inverter.<br/> Construction of system use a low price PIC16F87X. We analyze special character according to system operation through simulation and prove the validity through experiments.