High-efficiency wireless power transfer by optimal load and metamaterial slab

Ha‐Van, Nam; Dang-Duy, Ninh; Kim, Hyoung-Jun; Seo, Chulhun

doi:10.1587/elex.14.20170320

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…Recent advancements in WPT systems have focused on the deployment of meta-surface 13 – 15 , or metamaterial 17 – 21 . Such meta-surfaces or -materials have negative or near-zero effective permeability or permittivity characteristics that help to improve the coupling between the TX and RX to enhance the performance of the WPT system.…”

Section: Introductionmentioning

confidence: 99%

Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications

Pokharel

Barakat

Alshhawy

et al. 2021

Sci Rep

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Conventional resonant inductive coupling wireless power transfer (WPT) systems encounter performance degradation while energizing biomedical implants. This degradation results from the dielectric and conductive characteristics of the tissue, which cause increased radiation and conduction losses, respectively. Moreover, the proximity of a resonator to the high permittivity tissue causes a change in its operating frequency if misalignment occurs. In this report, we propose a metamaterial inspired geometry with near-zero permeability property to overcome these mentioned problems. This metamaterial inspired geometry is stacked split ring resonator metamaterial fed by a driving inductive loop and acts as a WPT transmitter for an in-tissue implanted WPT receiver. The presented demonstrations have confirmed that the proposed metamaterial inspired WPT system outperforms the conventional one. Also, the resonance frequency of the proposed metamaterial inspired TX is negligibly affected by the tissue characteristics, which is of great interest from the design and operation prospects. Furthermore, the proposed WPT system can be used with more than twice the input power of the conventional one while complying with the safety regulations of electromagnetic waves exposure.

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Section: Introductionmentioning

confidence: 99%

Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications

Pokharel

Barakat

Alshhawy

et al. 2021

Sci Rep

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“…Wireless power transfer (WPT) has received great attention because of its safety, clean, and reliability, without the constraint of wires [1,2,3,4]. Currently, WPT technology has been widely used in various electronic devices, such as mobile phones [5,6], laptops [7,8], televisions [9,10], electric vehicles [11,12,13] and medical equipment [14].…”

Section: Introductionmentioning

confidence: 99%

A coaxial dual-receiver wireless power transfer system with bipolar coils to eliminate cross-coupling and achieve a controllable power distribution

Zhuo

Luo

Zhang

et al. 2020

IEICE Electron. Express

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This paper proposes a dual-receiver wireless power transfer system that uses bipolar coils as a transmitter and receivers. Compared with a traditional dual-receiver system with unipolar coils, the proposed system can effectively and conveniently eliminate cross-coupling between the receivers, and another significant feature of the system is the ease of changing the received power of the two receiver loads by changing the relative angle of the bipolar coils. The mutual inductance of the bipolar coils is modelled by Newman's formula. Then a system design method to eliminate the influence of cross-coupling and realize controllable power allocation is proposed.

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“…Compared with the wired power transmission mode, it avoids traditional problems such as wire friction and aging [1,2,3]. Additionally, WPT is safe and convenient for electric vehicles [4,5,6,7], electronic equipment [8,9,10], and biomedicines [11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Transmission characteristics analysis of an MCR-WPT system with SP resonance structure based on harmonic current influence

Zhao

Xing

Sun

et al. 2019

IEICE Electron. Express

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Aiming at harmonic current influence on transmission characteristics in a magnetically coupled resonance wireless power transfer (MCR-WPT) system with a series-parallel (SP) structure, this paper develops a transmission characteristics expression method and a WPT system with a power factor correction (PFC) structure. Using the mutual inductance theory with harmonic current influence, the equivalent circuit model of the system was established and the formula for the transmission characteristics was obtained. An input current harmonic suppression method was developed, and a dual-boost PFC structure was designed on the transmitter side of the system to reduce the influence of the input current harmonic. According to the determined parameters, simulation analysis on transmission characteristics comparison between different systems was conducted. The experiment platform was built. The results of load experiment, frequency experiment and waveform analysis experiment show that the harmonic suppression and transmission characteristics were improved.

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High-efficiency wireless power transfer by optimal load and metamaterial slab

Cited by 11 publications

References 11 publications

Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications

Wireless power transfer system rigid to tissue characteristics using metamaterial inspired geometry for biomedical implant applications

A coaxial dual-receiver wireless power transfer system with bipolar coils to eliminate cross-coupling and achieve a controllable power distribution

Transmission characteristics analysis of an MCR-WPT system with SP resonance structure based on harmonic current influence

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