TY - GEN
T1 - A pulse density modulation method for ZVS full-bridge converters in wireless power transfer systems
AU - Li, Hongchang
AU - Fang, Jingyang
AU - Chen, Shuxin
AU - Tang, Yi
AU - Wang, Kangping
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/4/18
Y1 - 2018/4/18
N2 - This paper aims to combine two advanced techniques, namely, pulse density modulation (PDM) and zero-voltage-switching (ZVS) class-D converters, for wireless power transfer (WPT) systems. PDM enables voltage regulation and efficiency maximization without additional dc/dc stages. ZVS class-D converters ensure soft switching for various coupling and load conditions. However, these two techniques cannot be directly combined because the ZVS relies on the symmetric and continuous switching operation, which would be disrupted by PDM. This paper modifies the topology of the ZVS class-D converter and proposes new operating principles and modulation logics for the modified converter, which is called PDM ZVS full-bridge converter, so that the two techniques are successfully combined. The effectiveness of the proposed method was verified in experiment. The overall efficiency of the experimental WPT system is 94 ∼ 72 % when the power transfer distance was 0.1 ∼ 0.4 m, while the diameter of the coils was 0.3 m.
AB - This paper aims to combine two advanced techniques, namely, pulse density modulation (PDM) and zero-voltage-switching (ZVS) class-D converters, for wireless power transfer (WPT) systems. PDM enables voltage regulation and efficiency maximization without additional dc/dc stages. ZVS class-D converters ensure soft switching for various coupling and load conditions. However, these two techniques cannot be directly combined because the ZVS relies on the symmetric and continuous switching operation, which would be disrupted by PDM. This paper modifies the topology of the ZVS class-D converter and proposes new operating principles and modulation logics for the modified converter, which is called PDM ZVS full-bridge converter, so that the two techniques are successfully combined. The effectiveness of the proposed method was verified in experiment. The overall efficiency of the experimental WPT system is 94 ∼ 72 % when the power transfer distance was 0.1 ∼ 0.4 m, while the diameter of the coils was 0.3 m.
KW - Maximum efficiency point tracking (MEPT)
KW - Pulse density modulation (PDM)
KW - Soft switching
KW - Wireless power transfer (WPT)
UR - https://www.scopus.com/pages/publications/85046948826
U2 - 10.1109/APEC.2018.8341550
DO - 10.1109/APEC.2018.8341550
M3 - 会议稿件
AN - SCOPUS:85046948826
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 3143
EP - 3148
BT - APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Y2 - 4 March 2018 through 8 March 2018
ER -