To enhance the misalignment tolerance and system integration of the wireless power transfer (WPT) system, an integrated coupler consisting of capacitors and coils overlapped coaxially is proposed in this article and integrated into the hybrid WPT (HWPT) system without extra compensation components. The system utilizes the complementary characteristics of different transmission channels to realize the synergistic transfer of different coupled powers under a wide coupling range. Based on the mutual influence between capacitors and coils in terms of electrical parameters in a limited axial projection area and the zero-phase-angle condition considering the mutual capacitance obtained by the fundamental harmonics approximation method, the method of regulating the transfer ratio of the two types of coupled powers is mastered. A method to realize the HWPT with high misalignment tolerance characteristics by frequency tracking is proposed to solve the problem of the system's resonant state being disrupted when the position of the integrated coupler is misaligned. The field-circuit coupling model verifies the feasibility of the analysis and transfer method. Finally, an experimental verification platform for 500 W is built to achieve 82.7% power transfer in the WPT system with 40% unidirectional misalignment.

中文翻译：

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通过频率调谐增强具有集成耦合器的混合无线功率传输系统的错位容差


为了增强无线功率传输（WPT）系统的不对中容差和系统集成度，本文提出了一种由同轴重叠的电容器和线圈组成的集成耦合器，并将其集成到混合WPT（HWPT）系统中，而无需额外的补偿组件。该系统利用不同传输通道的互补特性，实现宽耦合范围下不同耦合功率的协同传输。基于电容器和线圈在有限轴向投影面积内电参数的相互影响以及通过基波近似法得到的考虑互电容的零相角条件，提出了调节两者传输比的方法掌握耦合功率的类型。针对集成耦合器位置失准时系统谐振状态被破坏的问题，提出了一种通过频率跟踪实现高失准容限特性的HWPT的方法。场路耦合模型验证了分析和传递方法的可行性。最后，搭建了500 W的实验验证平台，在单向失准40%的情况下，WPT系统实现了82.7%的功率传输。