This article presents a dual-side capacitor tuning and cooperative control strategy for wireless electric vehicle (EV) charging. To improve the efficiency of wireless EV charging across broad output voltages and wide-range load variations, this article introduces a reconfigurable WPT system by incorporating two switch-controlled-capacitors (SCCs) into the double-sided LCC (DLCC) compensation network. Based on the analytical model of the system, optimal capacitor tuning factors are derived to reduce the rms values of the inductor currents and to minimize the turn-OFF currents across the semiconductors. Furthermore, a dual-side cooperative control strategy is proposed. Through the collaborative control of the inverter, rectifier, and SCCs, the proposed method achieves dual-side optimal zero-voltage-switching (ZVS), wide power regulation, and maximum efficiency tracking simultaneously. Compared with the existing triple-phase-shift (TPS) method, the proposed approach improves the system efficiency across a wide range of dc output voltages and power levels. Experimental results demonstrate that the proposed method achieves a maximum efficiency improvement of up to 1.8% in the boost mode and 1.9% in the buck mode.

中文翻译：

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双侧电容器调谐和协作控制，可在无线电动汽车充电中实现效率优化的宽输出电压


本文提出了一种用于无线电动汽车 (EV) 充电的双侧电容器调谐和协作控制策略。为了提高跨宽输出电压和宽范围负载变化的无线电动汽车充电效率，本文引入了一种可重新配置的 WPT 系统，将两个开关控制电容器 (SCC) 合并到双面 LCC (DLCC) 补偿网络中。根据系统的分析模型，得出最佳电容器调谐因子，以降低电感器电流的均方根值并最小化半导体上的关断电流。此外，提出了一种双边协同控制策略。通过逆变器、整流器和 SCC 的协同控制，该方法同时实现双侧最优零电压开关 (ZVS)、宽功率调节和最大效率跟踪。与现有的三相移（TPS）方法相比，所提出的方法提高了各种直流输出电压和功率水平的系统效率。实验结果表明，该方法在升压模式下实现了高达 1.8% 的最大效率提升，在降压模式下实现了高达 1.9% 的最大效率提升。