Transfer efficiency of a misalignment of resonators in MR‐WPT for a laptop computer with SGR

• Published in: Microwave and optical technology letters 2017-08, Vol.59 (8), p.2016-2021
• Main Authors: Kang, Seok Hyon, Jung, Chang Won
• Format: Article
• Language: English
• Subjects: Charging; Computer simulation; Computing time; Electronic devices; Inductance; magnetic resonance; Misalignment; Portable computers; Resonators; slit ground resonator; Smartphones; Tablet computers; transfer efficiency; Transmitters; wireless power transfer; Wireless power transmission
• ISSN: 0895-2477; 1098-2760
• DOI: 10.1002/mop.30671

This study analyzed the effect of a misalignment of resonators on a magnetic resonant wireless power transfer (MR‐WPT) for a practical laptop computer with a slit ground resonator (SGR). MR‐WPT can be used in many applications for charging mobile devices, such as laptop computers, tablet PCs, and smartphones. We proposed a wireless power‐charging system from a transmitter on a desk or table to the receiver imbedded on a laptop computer. However, transfer efficiency decreased because of the misalignment between the movable receiver and the transmitter. This misalignment could have undue influence on the transfer power of MR‐WPT. To verify the effect of a misalignment of resonators on MR‐WPT, we simulated mutual inductance according to the misaligned distance between the transmitter and the receiver. Moreover, we experimentally proved this relationship through a practical laptop model with an SGR in MR‐WPT.