A Conformal Split-Ring Loop as a Self-Resonator for Wireless Power Transfer



Wang, Jingchen, Leach, Mark Paul, Lim, Eng Gee ORCID: 0000-0003-0199-7386, Wang, Zhao, Jiang, Zhenzhen ORCID: 0000-0003-3306-883X, Pei, Rui ORCID: 0000-0003-0829-8334 and Huang, Yi ORCID: 0000-0001-7774-1024
(2019) A Conformal Split-Ring Loop as a Self-Resonator for Wireless Power Transfer. IEEE ACCESS, 8. pp. 911-919.

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Abstract

A conventional printed spiral coil (PSC) has a self-resonant frequency and its equivalent circuit is a parallel inductor-capacitor (LC) circuit. It is desirable to use PSCs in wireless power transfer (WPT) applications; however, these are most commonly constituted by a series-primary and series- or parallel-secondary circuit. This paper proposes a printed conformal split-ring loop with the characteristic of a series LC circuit at its resonance frequency. Regarding the loop as a self-resonator, a magnetic-resonance coupled (MRC) WPT system with series-primary and secondary operating at 433 MHz in the industrial scientific and medical (ISM) band is presented. The maximum measured power transfer efficiency is 87.9% at a transfer distance of 22 mm, the best-reported result for such a configuration.

Item Type: Article
Uncontrolled Keywords: Resonant frequency, Impedance, Wireless power transfer, Equivalent circuits, RLC circuits, Spirals, Optimization, Wireless power transfer, split-ring resonators, printed spiral coils, near fields, magnetic resonance coupling
Depositing User: Symplectic Admin
Date Deposited: 17 Feb 2020 12:03
Last Modified: 15 Mar 2024 13:38
DOI: 10.1109/ACCESS.2019.2918640
Open Access URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumb...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3074887