Electric vehicle (EV) dynamical wireless charging is an emerging application area of wireless power transfer technologies. Compared with a classical static charging mode, there are two key challenges in a dynamical charging process. One is to determine charging area and corresponding excitation unit. The other is to provide large energy in a short time interval. Based on multiexcitation unit configuration for EV dynamical charging, this paper proposes a charging area determining method. The dynamical mutual inductance can be calculated based on dc current input and load detection. A charging area can be figured out based on output power requirement. And a switching mode method is given to control the charging process for multiexcitation unit configuration. On this basis, a power and efficiency enhancement method is proposed by utilizing a multiexcitation unit in the charging area. This method is beneficial for improving system power capacity without increasing the voltage and current stress. Finally, experimental results show that this method can realize accurate charging area determining and control. And the output power of dual excitation unit configuration can increase almost four times than that of a traditional single excitation unit configuration.

中文翻译：

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电动汽车无线动态充电系统多励磁单元配置的充电区域确定及功率提升方法

电动汽车 (EV) 动态无线充电是无线电源传输技术的新兴应用领域。与经典的静态充电模式相比，动态充电过程存在两个关键挑战。一是确定充电区域和相应的励磁单元。另一种是在短时间内提供大能量。基于电动汽车动态充电的多励磁单元配置，本文提出了一种充电区域的确定方法。动态互感可以根据直流电流输入和负载检测来计算。可以根据输出功率要求计算出充电区域。并给出了一种切换模式的方法来控制多励磁单元配置的充电过程。以这个为基础，提出了一种利用充电区多励磁单元提高功率和效率的方法。这种方法有利于在不增加电压和电流应力的情况下提高系统功率容量。最后，实验结果表明，该方法可以实现精确的充电区域确定和控制。并且双励磁单元配置的输出功率几乎是传统单励磁单元配置的四倍。