TY - GEN
T1 - A ZCS full-bridge PWM converter with self-adaptable soft-switching snubber energy
AU - Sun, Qian
AU - Wang, Huai
AU - Li, River T.H.
AU - Chung, Henry S.H.
AU - Tapuchi, Saad
AU - Huang, Nianci
AU - Ioinovici, Adrian
PY - 2008
Y1 - 2008
N2 - A new soft-switching full-bridge current-driven DC-DC converter is proposed for high voltage and high power applications: its power transistors turn-on/off with ZCS, what is suitable for IGBT switches. An active snubber formed by two active switches and one capacitor is inserted in the primary side of the converter. The snubber's accumulated energy is proportional to the input current, what allows ZCS at a very wide line and load range, by minimizing the required energy: for each value of the input current and load, the snubber's capacitor is charged only at the minimum voltage necessary for achieving ZCS. Thus, the level of the snubber energy necessary for soft-switching is self-adaptable. The duration of the resonant stages required for achieving the ZCS conditions are very short and independent of the values of the input current and load. No resonant current peaks appear. The experimental results obtained on a 3 kW prototype, built for the input voltage of 250V and output voltage of 15kV, confirmed the expected performances.
AB - A new soft-switching full-bridge current-driven DC-DC converter is proposed for high voltage and high power applications: its power transistors turn-on/off with ZCS, what is suitable for IGBT switches. An active snubber formed by two active switches and one capacitor is inserted in the primary side of the converter. The snubber's accumulated energy is proportional to the input current, what allows ZCS at a very wide line and load range, by minimizing the required energy: for each value of the input current and load, the snubber's capacitor is charged only at the minimum voltage necessary for achieving ZCS. Thus, the level of the snubber energy necessary for soft-switching is self-adaptable. The duration of the resonant stages required for achieving the ZCS conditions are very short and independent of the values of the input current and load. No resonant current peaks appear. The experimental results obtained on a 3 kW prototype, built for the input voltage of 250V and output voltage of 15kV, confirmed the expected performances.
UR - http://www.scopus.com/inward/record.url?scp=52349094461&partnerID=8YFLogxK
U2 - 10.1109/PESC.2008.4592408
DO - 10.1109/PESC.2008.4592408
M3 - Conference contribution
AN - SCOPUS:52349094461
SN - 9781424416684
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 3001
EP - 3007
BT - PESC '08 - 39th IEEE Annual Power Electronics Specialists Conference - Proceedings
T2 - PESC '08 - 39th IEEE Annual Power Electronics Specialists Conference
Y2 - 15 June 2008 through 19 June 2008
ER -