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한경희,성낙규 明知大學校 産業技術硏究所 1998 産業技術硏究所論文集 Vol.17 No.-
This paper proposes the improvement commutation circuit that is able to decrease commutation loss at no-load and light-load and commutate at step load variation. As the consideration result of operation characteristics, we confirmed that operation characteristics are equal to theory. Also, if we use recovery period of side diode by reverse bias of main thyristor, it increase storage charge utility factor of commutation capacitor.
성낙규(Nark-Kuy Sung),이승환(Seung-Hwan Lee),김성남(Sung-Nam Kim),이훈구(Hoon-Goo Lee),김용주(Yang-Joo Kim),한경희(Kyung-Hee Han) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
In this paper, we compose of the stepdown chopper and the current source inverter. Because dc side current of the current source inverter pulse with twice frequency of utility, we control that modulation factor of chopper is pulsed twice frequency. Therefore if voltage across the dc reactor equal to zero, it is decreased. And we control modulation factor of the chopper to operate at maximum power point around of solar cell.