A Wideband Strongly Coupled Magnetic Resonance Wireless Power Transfer System and Its Circuit Analysis

Conventional strongly coupled magnetic resonance (SCMR) wireless power transfer (WPT) systems have high quality factor ( Q ), leading to limited system bandwidths. In practical applications, especially in human-involved environments, the resonant frequency of SCMR resonators will shift due to the ef...

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Veröffentlicht in:	IEEE microwave and wireless components letters 2018-12, Vol.28 (12), p.1152-1154
Hauptverfasser:	Zhou, Wenshen, Sandeep, Srikumar, Wu, Pengde, Yang, Peng, Yu, Wenwei, Huang, Shao Ying
Format:	Artikel
Sprache:	eng
Schlagworte:	Bandwidths Broadband Circuit analysis Circuits Coils Equivalent circuits Integrated circuit modeling Magnetic resonance Q factors Resonant frequencies Resonators strongly coupled magnet resonance (SCMR) Wideband wideband system Wireless power transfer wireless power transfer (WPT) Wireless power transmission
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Zusammenfassung:	Conventional strongly coupled magnetic resonance (SCMR) wireless power transfer (WPT) systems have high quality factor ( Q ), leading to limited system bandwidths. In practical applications, especially in human-involved environments, the resonant frequency of SCMR resonators will shift due to the effect of highly dielectric human body. In this letter, a wideband four-coil SCMR WPT system is proposed by improving the coupling between the tx/rx coil and their corresponding resonators. The bandwidth is increased by over 100% compared to a conventional system without sacrificing the efficiency much. The wideband feature is demonstrated by both simulation and measurement. It is analyzed physically and by using an equivalent circuit analysis.
ISSN:	1531-1309 2771-957X 1558-1764 2771-9588
DOI:	10.1109/LMWC.2018.2876767