TY - GEN
T1 - Three level DC-DC converter based on cascaded dual half-bridge converter for circulating loss reduction
AU - Guo, Zhiqiang
AU - Sun, Kai
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016
Y1 - 2016
N2 - An improved two-half-bridge cascaded three-level (TL) DC-DC converter with reduced circulating current is proposed in this paper. The converter contains two transformers but without clamping diodes or flying capacitors. The rectifier stage is composed of four diodes and four windings of the two transformers. Because of the proper sequence of the windings, the circulating currents on the primary side of the transformers decay to zero during the freewheeling period. Although the circulating current is reduced, the primary switches still achieve zero voltage switching (ZVS). Furthermore, the proposed converter can reduce the current ripple of the filter inductor, leading to a reduction in output filter inductance. Due to the advantages mentioned above, the proposed converter can meet the high efficiency, low size, and light weight requirements. Lastly, a 1kW prototype is built to verify the performance of the proposed converter.
AB - An improved two-half-bridge cascaded three-level (TL) DC-DC converter with reduced circulating current is proposed in this paper. The converter contains two transformers but without clamping diodes or flying capacitors. The rectifier stage is composed of four diodes and four windings of the two transformers. Because of the proper sequence of the windings, the circulating currents on the primary side of the transformers decay to zero during the freewheeling period. Although the circulating current is reduced, the primary switches still achieve zero voltage switching (ZVS). Furthermore, the proposed converter can reduce the current ripple of the filter inductor, leading to a reduction in output filter inductance. Due to the advantages mentioned above, the proposed converter can meet the high efficiency, low size, and light weight requirements. Lastly, a 1kW prototype is built to verify the performance of the proposed converter.
KW - low output current ripple
KW - reduced circulating current
KW - three level
KW - zero voltage switching
UR - http://www.scopus.com/inward/record.url?scp=85015375031&partnerID=8YFLogxK
U2 - 10.1109/ECCE.2016.7855514
DO - 10.1109/ECCE.2016.7855514
M3 - Conference contribution
AN - SCOPUS:85015375031
T3 - ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
BT - ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
Y2 - 18 September 2016 through 22 September 2016
ER -