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3상 전압변동발생기의 직렬변압기 바이패스용 SCR의 스위칭 특성해석
송웅협(W.H. Song),박해영(H.Y. Park),노의철(E.C. Nho),김인동(I.D. Kim),김흥근(H.G. Kim),전태원(T.W. Chun) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
This paper deals with the SCR thyristor switching characteristics of a 3-phase voltage disturbance generator. The series transformers of the generator require bypass SCR thyristors to provide the source voltage to the output terminal in normal operating mode. The SCR thyristor switching characteristics is quite different according to the connection point to the series transformer. The switching characteristics is analysed and verified through simulation results.
석진규(J.K. Seok),강성관(S.K. Kang),송웅협(W.H. Song),조원우(W.W. Jo),노의철(E.C. Nho),김인동(I.D. Kim),전태원(T.W. Chun),김홍근(H.G. Kim) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
This paper deals with a welding time for a spot welding system. Conventional welding machine adopts several tens of switching devices connected in parallel to obtain a short welding time. This paper analyzed a welding system consisting with 4 IGBT switchs for a full-bridge inverter and conventional 60 [Hz] transformer. The simulation and experimental results show that the welding time can be minimized to 5 [ms] with the proposed scheme.
다이오드 클램프형 3-레벨 IGBT 인버터를 위한 과전압 방지 스너버 회로
정재헌(J.H. Jung),송웅협(W.H. Song),노의철(E.C. Nho),김인동(I.D. Kim),김흥근(H.G. Kim),전태원(T.W. Chun),유동욱(D.W. Yoo) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
This paper proposes a new snubber circuit for a diode-clamped 3-level IGBT inverter. The voltage spike at the instant of IGBT turn-off switching can be reduced considerably by the proposed scheme. The operation of the proposed snubber circuit is described and one pole of a 3-level IGBT inverter has been implemented. The simulation and experiment was carried out with 250V dc link voltage and 20A peak load current. The usefulness of the proposed snubber circuit is verified through experimental results.
3상 전압변동발생기의 직렬변압기에 의한 전압강하 특성해석
송웅협(W.H. Song),노의철(E.C. Nho),김인동(I.D. Kim),김흥근(H.G. Kim),전태원(T.W. Chun) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
This paper deals with the SCR thyristor switching characteristics of a 3-phase voltage disturbance generator. The series transformers of the generator require bypass SCR thyristors to provide the source voltage to the output terminal in normal operating mode. The SCR thyristor switching characteristics is quite different according to the connection point to the series transformer. The switching characteristics is analysed and verified through simulation results.
슈퍼커패시터를 이용한 에너지 저장용 3㎾급 양방향 DC/DC 컨버터
송웅협(W.H. Song),김진영(J.Y. Kim),노의철(E.C. Nho),김인동(I.D. Kim),김흥근(H.G. Kim),전태원(T.W. Chun) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.11
This paper describers a bidirectional DC/DC converter for charging and discharging of a supercapacitor. Simulations are carried out to see the operation and performance of the 3㎾-rated converter. Simulation results show that the charging/discharging characteristics is sufficient for the compensation of the response delay of a fuel cell.