TY - JOUR
T1 - An LCC-LCC Compensated WPT System With Switch-Controlled Capacitor for Improving Efficiency at Wide Output Voltages
AU - Fu, Na
AU - Deng, Junjun
AU - Wang, Zhenpo
AU - Chen, Deliang
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2023/7/1
Y1 - 2023/7/1
N2 - In this article, a triple-phase-shift (TPS) control strategy combining a switch-controlled capacitor (SCC) is proposed for LCC-LCC compensated wireless power transfer (WPT) system to improve the overall efficiency at wide output voltages. The basic mathematical model of the system is first established, and the conditions for zero-voltage switching (ZVS) and load matching are described under TPS. Then, the mechanism of TPS reducing system efficiency at wide output voltages is revealed based on the established model. An SCC is employed to adjust the compensation capacitance to achieve a minimum circulating reactive power on both sides and reduce the rectifier input current. Finally, the impact of the compensation capacitance variations on the current, output power, and impedance are analyzed, based on which the optimal value of adjustable capacitance for maximum efficiency is derived by further considering the established time domain model. A comparative experiment is performed with traditional TPS and the proposed control technique, which shows that the system with the proposed control technique achieves a higher efficiency over the TPS within the entire power range.
AB - In this article, a triple-phase-shift (TPS) control strategy combining a switch-controlled capacitor (SCC) is proposed for LCC-LCC compensated wireless power transfer (WPT) system to improve the overall efficiency at wide output voltages. The basic mathematical model of the system is first established, and the conditions for zero-voltage switching (ZVS) and load matching are described under TPS. Then, the mechanism of TPS reducing system efficiency at wide output voltages is revealed based on the established model. An SCC is employed to adjust the compensation capacitance to achieve a minimum circulating reactive power on both sides and reduce the rectifier input current. Finally, the impact of the compensation capacitance variations on the current, output power, and impedance are analyzed, based on which the optimal value of adjustable capacitance for maximum efficiency is derived by further considering the established time domain model. A comparative experiment is performed with traditional TPS and the proposed control technique, which shows that the system with the proposed control technique achieves a higher efficiency over the TPS within the entire power range.
KW - Electric vehicles (EVs)
KW - LCC compensation
KW - switch-controlled capacitor (SCC)
KW - wireless power transfer (WPT)
UR - http://www.scopus.com/inward/record.url?scp=85151569353&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2023.3260207
DO - 10.1109/TPEL.2023.3260207
M3 - Article
AN - SCOPUS:85151569353
SN - 0885-8993
VL - 38
SP - 9183
EP - 9194
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 7
ER -