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이정호(J.H. Lee),김준호(J.H Kim),원충연(C.Y. Won),김영렬(Y.R. Kim),김학성(H.S. Kim) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
In this paper, we proposed AC/DC boost converter to improve input current harmonic reduction in TIG welder The proposed harmonic reduction circuit with UC2854AN acting on constant switching frequency average current control has a three-loop control structure: the inner current loop, the line voltage feed-forward loop, and the outer voltage loop, Also, we applied the constant current strategy on full bridge IGBT inverter to stabilized the output current using the analog PI controller.<br/> To demonstrate the practical significance of the proposed methods, some simulation studies and experimental results are presented.