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Wireless power transfer via magnetically coupled resonance for small electronic devices

24 Apr 2018-
About: The article was published on 2018-04-24 and is currently open access. It has received 3 citations till now. The article focuses on the topics: Resonance & Wireless power transfer.
Citations
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Proceedings ArticleDOI
01 Jan 2019
TL;DR: This paper proposes the use of magnetically coupled resonance wireless power transfer to power LPWAN devices to increase the increase in distance between the transmitter and receiver and also curb the failure probability and degradation encountered by its coupling.
Abstract: LPWANs are emerging to provide solutions for covering very low-power Internet of Things devices and applications which may be distributed over large geographical areas. LPWANs generally consume very low power thus their batteries can last for a very long time. However, the problem with batteries is that they get damaged with time and they eventually run out. Wireless power transfer on the other hand is gaining popularity for long range wireless networks. Motivated by these developments and the challenge of simultaneously conducting wireless power transfer alongside data communication, this paper proposes the use of magnetically coupled resonance wireless power transfer to power LPWAN devices. This approach allows the increase in distance between the transmitter and receiver and also curb the failure probability and degradation encountered by its coupling. The use of shielding materials and flux guidance is also incorporated into the system in order to increase the efficiency of the system. The analytical solutions to ferrite structures as shielding materials is computed with High Frequency Structure Simulator (HFSS). HFSS is used to compute the S-parameters (input power reflection coefficient and forward power transmission coefficient) of the proposed system and magnetic characteristics by plotting electromagnetic field distributions.

5 citations

References
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Journal Article

28,685 citations


"Wireless power transfer via magneti..." refers background or methods or result in this paper

  • ...The recent WPT work on these applications can be found in [11]-[13]....

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  • ...The symmetric, planar MCR-WPT systems designed for small electronic devices have been described in [12] and [11], and achieved the highest efficiency of 74....

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  • ...These fully-planar MCR-WPT systems have the advantages of low profile, small footprint and easy fabrications when compared to three-dimensional coils; they make the systems much portable and feasible to be attached to or implemented in small electronic devices [11]....

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  • ...Square [11]-[13] and circular [3, 6, 25] coils are two commonly used basic geometries for WPT systems....

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  • ...As presented in [11], the key circuit parameters including inductance, capacitance and resistance for each loop and resonator can be expressed as (3-1), (3-4) and (3-6)....

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01 Jan 2015

12,972 citations


"Wireless power transfer via magneti..." refers background or methods in this paper

  • ...This type of WPT technique can be used to benefit power utilities such as cell phones [10, 28, 33], high power transportation applications [4, 6, 27] and RFID....

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  • ...• Applications to small consumer electronics such as smart phones [10, 28, 33], portable...

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  • ...A controlled resonance technology was proposed in [28] for charging mobile phones with relatively good spatial freedom....

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  • ...the magnetic coupling by the eddy current in the metal around the opening [28]....

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  • ...This method has been investigated and developed for charging electric vehicles [27], medical implantable devices [8], and small handheld electronic devices [28]....

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Journal ArticleDOI
06 Jul 2007-Science
TL;DR: A quantitative model is presented describing the power transfer of self-resonant coils in a strongly coupled regime, which matches the experimental results to within 5%.
Abstract: Using self-resonant coils in a strongly coupled regime, we experimentally demonstrated efficient nonradiative power transfer over distances up to 8 times the radius of the coils We were able to transfer 60 watts with ∼40% efficiency over distances in excess of 2 meters We present a quantitative model describing the power transfer, which matches the experimental results to within 5% We discuss the practical applicability of this system and suggest directions for further study

5,284 citations

Journal ArticleDOI
TL;DR: In this paper, the authors reviewed the technologies in the wireless power transfer (WPT) area applicable to electric vehicle (EV) wireless charging, and the obstacles of charging time, range, and cost can be easily mitigated.
Abstract: Wireless power transfer (WPT) using magnetic resonance is the technology which could set human free from the annoying wires. In fact, the WPT adopts the same basic theory which has already been developed for at least 30 years with the term inductive power transfer. WPT technology is developing rapidly in recent years. At kilowatts power level, the transfer distance increases from several millimeters to several hundred millimeters with a grid to load efficiency above 90%. The advances make the WPT very attractive to the electric vehicle (EV) charging applications in both stationary and dynamic charging scenarios. This paper reviewed the technologies in the WPT area applicable to EV wireless charging. By introducing WPT in EVs, the obstacles of charging time, range, and cost can be easily mitigated. Battery technology is no longer relevant in the mass market penetration of EVs. It is hoped that researchers could be encouraged by the state-of-the-art achievements, and push forward the further development of WPT as well as the expansion of EV.

1,603 citations


"Wireless power transfer via magneti..." refers background in this paper

  • ...Different MCR-WPT systems have been proposed for recharging electric vehicles [4], [5] and [6], laptop computers [3] and [7] and medical devices [8] and [9]....

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  • ...The former is the most commonly used wireless technology not only presented in academic papers including [4, 5, 10, 23, 24] but also available in commercial products such as electric toothbrush chargers....

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  • ...Many WPT systems have been developed over the past few decades [4, 5, 10, 23, 24]....

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Journal ArticleDOI
William C. Brown1
TL;DR: The history of power transmission by radiowaves is reviewed from Heinrich Hertz to the present time with emphasis upon the free-space microwave power transmission era beginning in 1958 as mentioned in this paper.
Abstract: The history of power transmission by radiowaves is reviewed from Heinrich Hertz to the present time with emphasis upon the free-space microwave power transmission era beginning in 1958. The history of the technology is developed in terms of its relationship to the intended applications. These include microwave powered aircraft and the Solar Power Satellite concept.

1,562 citations


"Wireless power transfer via magneti..." refers background in this paper

  • ...The history, basic theories, features and applications of microwave radiation WPT can be found in [46] and...

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