TY - JOUR
T1 - A Dual-Sided Control Strategy Based on Mode Switching for Efficiency Optimization in Wireless Power Transfer System
AU - Wu, Min
AU - Yang, Xu
AU - Chen, Wenjie
AU - Wang, Laili
AU - Jiang, Yongbin
AU - Zhao, Chenxu
AU - Yan, Zhengchao
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2021/8
Y1 - 2021/8
N2 - Transfer efficiency of a wireless power transfer (WPT) system is tightly related to the load, which varies greatly in a wide range during the charging process. Generally speaking, dual-sided control strategies are commonly applied to overcome the load variation and improve system efficiency. However, the system may suffer from hard switching, high control complexity, and auxiliary dc/dc converters. In this article, a dual-sided control strategy based on mode switching is proposed to approach an optimal load impedance, zero-voltage switching of all mosfets in WPT system, and a required output. In this control strategy, the output voltage of the inverter is adjusted in a wide range by switching the operation mode of the inverter to approach the optimal load impedance. The output current/voltage is regulated by the active rectifier control. Besides, a novel phase-locked method is proposed for the semi-bridgeless active rectifier control, which is simpler compared with the traditional phase-locked method. Finally, a 500-W prototype is built to verify the theoretical analysis, and the peak system efficiency of 93.9% is gained with k = 0.23.
AB - Transfer efficiency of a wireless power transfer (WPT) system is tightly related to the load, which varies greatly in a wide range during the charging process. Generally speaking, dual-sided control strategies are commonly applied to overcome the load variation and improve system efficiency. However, the system may suffer from hard switching, high control complexity, and auxiliary dc/dc converters. In this article, a dual-sided control strategy based on mode switching is proposed to approach an optimal load impedance, zero-voltage switching of all mosfets in WPT system, and a required output. In this control strategy, the output voltage of the inverter is adjusted in a wide range by switching the operation mode of the inverter to approach the optimal load impedance. The output current/voltage is regulated by the active rectifier control. Besides, a novel phase-locked method is proposed for the semi-bridgeless active rectifier control, which is simpler compared with the traditional phase-locked method. Finally, a 500-W prototype is built to verify the theoretical analysis, and the peak system efficiency of 93.9% is gained with k = 0.23.
KW - Mode switching
KW - optimal load impedance
KW - wireless power transfer (WPT)
KW - zero-voltage switching (ZVS)
UR - http://www.scopus.com/inward/record.url?scp=85100799839&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2021.3055963
DO - 10.1109/TPEL.2021.3055963
M3 - 文章
AN - SCOPUS:85100799839
SN - 0885-8993
VL - 36
SP - 8835
EP - 8848
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 8
M1 - 9343674
ER -