TY - GEN
T1 - An Improved Asymmetrical PWM Controlled Full Bridge DC-DC Converter for Circulating Current Reduction
AU - Zhu, Yunqiu
AU - Guo, Zhiqiang
AU - Han, Bing
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/11/29
Y1 - 2020/11/29
N2 - An improved full bridge converter that features reduced circulating current is presented in this paper. Two split capacitors, two transformers and an improved rectifier stage have been added in the modified converter. Different form traditional phase-shift converters, the proposed converter is controlled by asymmetrical PWM signals. This converter can greatly reduce the circulating current during the freewheeling period. Although the circulating current is reduced, all switches can still achieve ZVS. In addition, the load power is equally shared between the two transformers. And the current ripple of the output filter inductor is also reduced. The volume of the transformers and the output filter inductor can be optimized. What's more, this converter can meet short circuit and soft start-up cases. Finally, a 1kW prototype is built to verity the proposed converter.
AB - An improved full bridge converter that features reduced circulating current is presented in this paper. Two split capacitors, two transformers and an improved rectifier stage have been added in the modified converter. Different form traditional phase-shift converters, the proposed converter is controlled by asymmetrical PWM signals. This converter can greatly reduce the circulating current during the freewheeling period. Although the circulating current is reduced, all switches can still achieve ZVS. In addition, the load power is equally shared between the two transformers. And the current ripple of the output filter inductor is also reduced. The volume of the transformers and the output filter inductor can be optimized. What's more, this converter can meet short circuit and soft start-up cases. Finally, a 1kW prototype is built to verity the proposed converter.
KW - asymmetrical PWM
KW - low output current ripple
KW - reduced circulating current
KW - zero voltage switching
UR - http://www.scopus.com/inward/record.url?scp=85103226235&partnerID=8YFLogxK
U2 - 10.1109/IPEMC-ECCEAsia48364.2020.9367974
DO - 10.1109/IPEMC-ECCEAsia48364.2020.9367974
M3 - Conference contribution
AN - SCOPUS:85103226235
T3 - 2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
SP - 1324
EP - 1331
BT - 2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
Y2 - 29 November 2020 through 2 December 2020
ER -