Investigation of magnetic resonance coupling circuit topologies for wireless power transmission. Issue 7 (27th February 2019)

• Record Type: Journal Article
• Authors: Wang, Jingchen; Leach, Mark; Lim, Eng Gee; Wang, Zhao; Huang, Yi
• Is Part Of: Microwave and optical technology letters. Volume 61:Issue 7(2019:Jul.)
• Page Start: 1755
• Page End: 1763
• Publication Date: 2019-02-27
• Subjects: frequency splitting -- magnetic resonance coupling -- topologies selection -- wireless power transmission; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.31803
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: Magnetic resonance coupling circuits have four general topologies; however, there is a lack of comprehensive theoretical analysis with experimental verification for each of these topologies regarding their attractiveness for wireless power transfer (WPT). This article provides this for each of the four topologies to fully understand their differences and allow the selection of the most appropriate type based on system requirements. In addition, a problem associated with the resonance coupling method is the phenomenon of frequency splitting, which can lead to a high‐power transfer efficiency but low‐load power at the resonant frequency. Reasons for frequency splitting and methods of circumventing the problem will be illustrated in this article. Of the four topologies, the series‐parallel (SP) (input‐output) circuit configuration is the most efficient for the realization of a WPT system with a large load impedance, in terms of achieving both a high power transfer efficiency and high‐load power.