Power transfer efficiency of magnetic resonance wireless power link with misaligned relay resonator

Kim, Ki Young; Ryu, Young-Ho; Park, Eunseok; Kim, Nam Yoon; Choi, Jinsung; Kim, Dong-Zo; Yoon, Choon Sup; Song, Ki‐Hoon; Ahn, Chi‐Hyung; Park, Yun-Kwon; Kwon, Soon Jae

doi:10.23919/eumc.2012.6459397

Cited by 9 publications

(6 citation statements)

References 2 publications

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“…The relay resonator system is formed by adding an extra relay resonator between the transmit coil and receive coil. Optimization and experimental evaluations of such a system have been conducted with 115.6kHz [210], 1.25MHz [211], 6.78MHz [212], 7MHz [204], and 13.56MHz [213] operating frequencies. To further extend the transmission range of relay resonator system, domino-resonator systems can be formed by placing multiple adjacent resonator relays between the transmit coil and receive coil.…”

Section: Wireless Charging System Overviewmentioning

confidence: 99%

Wireless Charging Technologies: Fundamentals, Standards, and Network Applications

Wang

Niyato

et al. 2016

IEEE Commun. Surv. Tutorials

865

395

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Abstract-Wireless charging is a technology of transmitting power through an air gap to electrical devices for the purpose of energy replenishment. The recent progress in wireless charging techniques and development of commercial products have provided a promising alternative way to address the energy bottleneck of conventionally portable battery-powered devices. However, the incorporation of wireless charging into the existing wireless communication systems also brings along a series of challenging issues with regard to implementation, scheduling, and power management. In this article, we present a comprehensive overview of wireless charging techniques, the developments in technical standards, and their recent advances in network applications. In particular, with regard to network applications, we review the static charger scheduling strategies, mobile charger dispatch strategies and wireless charger deployment strategies. Additionally, we discuss open issues and challenges in implementing wireless charging technologies. Finally, we envision some practical future network applications of wireless charging.

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Section: Wireless Charging System Overviewmentioning

confidence: 99%

Wireless Charging Technologies: Fundamentals, Standards, and Network Applications

Wang

Niyato

et al. 2016

IEEE Commun. Surv. Tutorials

865

395

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show abstract

“…Lateral and angular misalignment analysis for inductive coupling WPT has been examined by Kyriaki [5]. Previous research has been conducted to address the effect of coil design in misalignment scenarios [6] [7] [8], however, no methodology was given to mitigate the issue and no recommendations were made for an economical design to solve the problem once and for all.…”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient and Adaptive Design for Wireless Power Transfer in Electric Vehicles

Mou

Groling

Sun

2017

IEEE Trans. Ind. Electron.

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any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract-Wireless power transfer (WPT) could revolutionize global transportation and accelerate growth in the Electric Vehicle (EV) market, offering an attractive alternative to cabled charging. Coil misalignment is inevitable due to driver parking behaviour and has a detrimental effect on power transfer efficiency (PTE). This paper proposes a novel coil design and adaptive hardware to improve PTE in magnetic resonant coupling WPT and mitigate coil misalignment, a crucial roadblock in its acceptance. The new design was verified using ADS, providing a good match to theoretical analysis. Custom designed receiver and transmitter circuitry was used to simulate vehicle and parking bay conditions and obtain PTE data in a small-scale setup. Experimental results showed that PTE can be improved by 30% at the array's centre, and an impressive 90% when misaligned by 3/4 of the arrays radius. The proposed novel coil array achieves overall higher PTE compared to the benchmark single coil design.

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“…More recently, to extend the distance covered by the wireless link, the use of relay resonators interposed between the transmitter and the receiver (indirect feed) has been suggested. [12][13][14][15][16][17][18][19] In particular, the case of a link using 3 resonators has been studied in previous studies, 14,15 while the case of an indirect feed/load implemented by means of 4 resonators has been studied in other studies. [16][17][18][19] In more detail, in 1 study, 14 the coupled mode theory has been used to analyze the efficiency in the case where a single relay resonator is added to a direct link; it is demonstrated that the presence of the intermediate resonator allows improving the efficiency of the link even in the case of noncoaxially arranged resonators.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two‐port network approach for a wireless power transfer link using a cascade of inductively coupled resonators

Monti

Tarricone

Mongiardo

2017

Int J Numerical Modelling

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Summary A wireless power transmission link consisting of a transmitting and a receiving resonator wirelessly connected by means of N relay resonators is investigated, and a 2‐port network approach is proposed. The presented approach exploits the properties of periodic networks to derive useful closed‐form formulas that can be used to match the wireless energy link with respect to generic reference impedances.

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Power transfer efficiency of magnetic resonance wireless power link with misaligned relay resonator

Cited by 9 publications

References 2 publications

Wireless Charging Technologies: Fundamentals, Standards, and Network Applications

Wireless Charging Technologies: Fundamentals, Standards, and Network Applications

Energy-Efficient and Adaptive Design for Wireless Power Transfer in Electric Vehicles

Two‐port network approach for a wireless power transfer link using a cascade of inductively coupled resonators

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