In this letter, a new coupling structure for dynamic wireless power transfer (DWPT) systems is proposed. Bipolar coils are symmetrically placed on the transmitter unipolar coils, resulting in natural decoupling between the bipolar coils and the unipolar coils. This special structure can mitigate the self-couplings between the adjacent unipolar transmitter coils and hence facilitate the design of the compensation circuit. Another remarkable advantage of this design is that it can lead to a stable mutual coupling between the transmitter array and the receiver when the receiver moves along the transmitter, making it a natural fit for DWPT applications. Furthermore, to reduce the electromagnetic interference and power loss, an automatic segmented control scheme is implemented, and a position detection method by monitoring the primary current is developed. The feasibility of the proposed coupling structure and the position detection method are verified on a laboratory prototype with 72-V output voltage. The experimental results show that the power fluctuation is within ±2.5%, and system efficiency is around 90%. (This letter is accompanied by a video demonstrating the experimental test).

中文翻译：

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一种用于分段控制动态无线电力传输系统的新型耦合结构和位置检测方法

在这封信中，提出了一种用于动态无线电力传输 (DWPT) 系统的新耦合结构。双极线圈对称地放置在发射器单极线圈上，导致双极线圈和单极线圈之间自然解耦。这种特殊的结构可以减轻相邻单极发射线圈之间的自耦合，从而有利于补偿电路的设计。这种设计的另一个显着优点是，当接收器沿发射器移动时，它可以在发射器阵列和接收器之间产生稳定的互耦合，使其自然适合 DWPT 应用。此外，为了减少电磁干扰和功率损耗，实现了自动分段控制方案，并开发了一种监测初级电流的位置检测方法。在具有 72-V 输出电压的实验室原型上验证了所提出的耦合结构和位置检测方法的可行性。实验结果表明，功率波动在±2.5%以内，系统效率在90%左右。（这封信附有演示实验测试的视频）。