TY - GEN
T1 - A Co-Designed Hybrid Charger of OBC and WC With Partially Closed and Directionally Open Magnetic Circuits for EV Charging
AU - Zhang, Tianyi
AU - Wei, Guo
AU - Gao, Xin
AU - Zhu, Chunbo
N1 - Publisher Copyright:
© 2026 IEEE.
PY - 2026
Y1 - 2026
N2 - In this paper, a hybrid charger integrated with the on-board charger (OBC) and wireless charger (WC) is introduced. This innovative hybrid charger applies proposed partially closed and directionally open magnetic circuits to improve the power density and efficiency of hybrid charger. The planar transformer is partitioned into tightly-coupled (TC) and loosely-coupled (LC) sections, respectively implemented by the proposed high coupling coefficient bifilar winding planar transformer (BWPT) and LC-double-DD coil. In OBC, the leakage inductance of LC-double-DD coil is cleverly utilized as the resonant inductance for the CLLC converter, while its mutual inductance significantly enhances the magnetizing inductance of BWPT. In WC, the BWPT ensures the current balance across dual receivers, while the LC-double-DD acts as the resonant inductors of LCC circuit. A 11kW-OBC and 11kW-WC experimental prototype is built to validate feasibility, results demonstrate peak charging efficiencies of 97.7% and 94.2% for OBC and WC, respectively.
AB - In this paper, a hybrid charger integrated with the on-board charger (OBC) and wireless charger (WC) is introduced. This innovative hybrid charger applies proposed partially closed and directionally open magnetic circuits to improve the power density and efficiency of hybrid charger. The planar transformer is partitioned into tightly-coupled (TC) and loosely-coupled (LC) sections, respectively implemented by the proposed high coupling coefficient bifilar winding planar transformer (BWPT) and LC-double-DD coil. In OBC, the leakage inductance of LC-double-DD coil is cleverly utilized as the resonant inductance for the CLLC converter, while its mutual inductance significantly enhances the magnetizing inductance of BWPT. In WC, the BWPT ensures the current balance across dual receivers, while the LC-double-DD acts as the resonant inductors of LCC circuit. A 11kW-OBC and 11kW-WC experimental prototype is built to validate feasibility, results demonstrate peak charging efficiencies of 97.7% and 94.2% for OBC and WC, respectively.
KW - anti-misalignment
KW - compensation inductance
KW - wireless power transfer
UR - https://www.scopus.com/pages/publications/105037327213
U2 - 10.1109/EEICAI68535.2026.11441685
DO - 10.1109/EEICAI68535.2026.11441685
M3 - 会议稿件
AN - SCOPUS:105037327213
T3 - Proceedings of 2026 International Conference on Electrical Engineering, Intelligent Control and Artificial Intelligence, EEICAI 2026
SP - 11
EP - 14
BT - Proceedings of 2026 International Conference on Electrical Engineering, Intelligent Control and Artificial Intelligence, EEICAI 2026
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2026 International Conference on Electrical Engineering, Intelligent Control and Artificial Intelligence, EEICAI 2026
Y2 - 9 January 2026 through 11 January 2026
ER -