Impedance matching method for any-hop straight wireless power transmission using magnetic resonance

Narusue, Yoshiaki; Kawahara, Yoshihiro; Asami, Tohru

doi:10.1109/rws.2013.6486685

Cited by 25 publications

(21 citation statements)

References 3 publications

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“…As per wireless power transfer (WPT) links using a generic number of relay resonators, interesting theoretical and experimental results have been presented in the literature …”

Section: Introductionmentioning

confidence: 99%

“…As per wireless power transfer (WPT) links using a generic number of relay resonators, interesting theoretical and experimental results have been presented in the literature. [21][22][23][24][25] In Lee et al, 21 the effects on the efficiency of the mutual coupling between nonadjacent resonators have been analyzed for a WREL system using several resonators arranged in a straight domino form. The authors demonstrated that the presence of a nonnegligible mutual coupling between nonadjacent elements leads to an optimal operating frequency for efficiency maximization shifted below or above the frequency of resonance of the resonators.…”

Section: Introductionmentioning

confidence: 99%

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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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“…As per wireless power transfer (WPT) links using a generic number of relay resonators, interesting theoretical and experimental results have been presented in the literature …”

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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“…Several methods have been employed to increase the range including impedance matching [9] and notably the use of passive, resonant, relay coils to increase the oscillating magnetic flux at the receiving antenna. There are two main configurations for these relays that have been studied axial [10] and planar [11] [12]. In general the relays considered in all these works are of similar size to the source and receive coils and transfer power by mutual magnetic coupling [13] their mutual inductance.…”

Section: Introductionmentioning

confidence: 99%

“…In such a configurations, with perfectly matched terminals, waves are launched by the source, traverse the structure, experiencing loss due to the resistance of each relay coil, and are absorbed by the receiver as considered in [11] amongst others.…”

Section: Introductionmentioning

confidence: 99%

Magnetoinductive Waves and Wireless Power Transfer

Stevens

2015

IEEE Trans. Power Electron.

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Recent research in wireless power transfer has highlighted the potential benefits for relaying power from source to receiver by a number of resonating relay coils coupled via mutual inductance. A number of researchers have reported experimental systems based on relay coils and have noted that power transfer efficiency to loads located at different points on the structure can vary widely. Such structures, often known as Magneto-Inductive Waveguides are well known to carry signals known as Magneto-Inductive waves (MIW) when excited with a frequency in their passband. This paper presents an investigation into their impact on wireless power systems and methods by which negative effects may be minimized. Using the physics of Magneto-Inductive Waves it becomes possible to understand the behavior of relay coil systems and to model them in a closed form. The effects of reflections and standing waves on a one dimensional system are considered and their effect on the input impedance and the variation of matching conditions determined. An optimum receiver load is proposed based on the results and tested experimentally. A simple experimental demonstrator is used as a model for study which achieves 58% efficient power transfer to a single load at any point on its length.

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“…Several methods have been employed to increase the range, notably the use of passive, resonant, relay coils to increase the oscillating magnetic flux at the receiving antenna. There are two main configurations for relays that have been studied -axial [7] and planar [8,9]. Such relay coil arrays are identical to metamaterial structures.…”

Section: Introductionmentioning

confidence: 99%

A magneto-inductive wave wireless power transfer device

Stevens

2015

Wirel Pow Transfer

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A magneto-inductive wave wireless power transfer device christopher j. stevensMagneto-inductive waves are a form of propagation which only exists in certain types of magnetic metamaterials formed from inductively coupled resonant circuits. We present an investigation of their potential as contactless power transfer devices capable of carrying power along a surface between suitably prepared terminals while simultaneously offering a broadband data channel. Input impedances and their matching conditions are explored with a view to offering a simple power system design. A device with 75% peak and 40% minimum efficiency is demonstrated and designs with potential for better than 70% mean and 90% peak are reported. The product of planar magnetic coupling and metamaterial cell Q factor is determined to be a key optimization parameter for high efficiency.

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Impedance matching method for any-hop straight wireless power transmission using magnetic resonance

Cited by 25 publications

References 3 publications

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

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

Magnetoinductive Waves and Wireless Power Transfer

A magneto-inductive wave wireless power transfer device

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