TY - GEN
T1 - A Novel Efficiency-Improved LLC-Buck Isolated Power Processing Circuit
AU - Yang, Danni
AU - Zhang, Yan
AU - Yu, Boyang
AU - Liu, Jinjun
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2022
Y1 - 2022
N2 - Due to the wide input voltage range of urban rail transit, the design of an efficient and stable auxiliary power system has become a technical problem to be solved urgently. As the isolated DC-DC converter is a key part of auxiliary power system, this paper proposed a LLC-Buck structure power processing circuit, which connects the LLC output and the output of the additional Buck circuit in series to supply the load. The proposed circuit combines the advantages of LLC and Buck, which are the peak efficiency of LLC converter when it works at the resonant point, and the strong ability of Buck converter to regulate voltage. The design method is given, and its efficiency advantage is approved by comparing with the traditional two-stage Boost-LLC circuit. Finally, the effectiveness of the circuit structure and its good dynamic response performance is verified by experiment.
AB - Due to the wide input voltage range of urban rail transit, the design of an efficient and stable auxiliary power system has become a technical problem to be solved urgently. As the isolated DC-DC converter is a key part of auxiliary power system, this paper proposed a LLC-Buck structure power processing circuit, which connects the LLC output and the output of the additional Buck circuit in series to supply the load. The proposed circuit combines the advantages of LLC and Buck, which are the peak efficiency of LLC converter when it works at the resonant point, and the strong ability of Buck converter to regulate voltage. The design method is given, and its efficiency advantage is approved by comparing with the traditional two-stage Boost-LLC circuit. Finally, the effectiveness of the circuit structure and its good dynamic response performance is verified by experiment.
KW - Design method
KW - Efficiency advantage
KW - Novel isolated DC converter
KW - Urban rail transit
UR - https://www.scopus.com/pages/publications/85128891315
U2 - 10.1007/978-981-19-1870-4_21
DO - 10.1007/978-981-19-1870-4_21
M3 - 会议稿件
AN - SCOPUS:85128891315
SN - 9789811918698
T3 - Lecture Notes in Electrical Engineering
SP - 200
EP - 207
BT - The proceedings of the 16th Annual Conference of China Electrotechnical Society - Volume II
A2 - Liang, Xidong
A2 - Li, Yaohua
A2 - He, Jinghan
A2 - Yang, Qingxin
PB - Springer Science and Business Media Deutschland GmbH
T2 - 16th Annual Conference of China Electrotechnical Society, ACCES 2021
Y2 - 24 September 2021 through 26 September 2021
ER -