Determination of reverse-current coil turns layout to mitigate over-coupling in resonant inductive power transfer links

• Main Authors: Eteng, A. A., Rahim, S. K. A., Leow, C. Y., Chew, B. W., Vandenbosch, G. A. E.
• Format: Article
• Published: Applied Computational Electromagnetics Society (ACES) 2017
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/75320/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014530828&partnerID=40&md5=46d75fdd6fccb38d7dbe0d1da188df7b

The transfer efficiency of two-coil resonant inductive power transfer links is known to significantly degrade with a reduction of the coil distance, due to an over-coupling at shorter distances. In this work, a simple technique is introduced to determine the spatial layout of reverse-current coil turns, which suppresses the overcoupling-induced transfer efficiency drop. By employing the spatial layout of reverse-current turns as a design parameter, the proposed method provides more generality in its implementation compared to other reverse-current turn methods. Simulation and experimental results validate the method, suggesting a potential for distanceinsensitive implementations.