Planar Coil Extension Regions for Stable Wireless Power Transfer

The patent applies dynamics by making the coil configuration adaptable to different distances. The extension regions allow the coils to dynamically adjust their effective coupling area based on the separation distance, maintaining optimal coupling characteristics across varying distances without requiring active control mechanisms.

The patent changes the geometric parameters of the coils by introducing extension regions that increase the occupation area. This parameter modification allows the coils to maintain a stable coupling coefficient k even when the distance between them varies, effectively decoupling the coupling stability from distance variations.

The patent applies self-service by designing the coil geometry itself to provide the stabilization function. The extension regions inherently maintain the coupling coefficient stability through their geometric configuration, eliminating the need for external impedance adjusting units or control circuits. The structure serves its own stabilization function without requiring additional components.

The patent extracts the impedance control function from the circuit domain and implements it in the geometric domain. By incorporating the stabilization mechanism directly into the coil structure through extension regions, the complex circuit-based impedance adjustment is replaced with a simple geometric configuration that inherently maintains coupling stability.

The patent applies segmentation by dividing the coil structure into a base region and extension regions. The extension regions are segmented additions that specifically target the areas needing enhanced coupling, rather than uniformly increasing the entire coil size. This allows localized area increase only where beneficial for maintaining coupling stability.

The patent applies local quality by concentrating the increased occupation area specifically in the extension regions that face each other across the gap. Rather than uniformly expanding all coils, the design locally enhances the coupling area where it most impacts the coupling coefficient stability, optimizing the area-to-stability ratio.