Efficient wireless transmission of power using resonators with coupled electric fields

Leyh, G.E.; Kennan, M.D.

doi:10.1109/naps.2008.5307364

Cited by 29 publications

(9 citation statements)

References 2 publications

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“…Energy will be delivered as soon as this coupling relation is set up. The transfer efficiency of this mode is affected by surrounding objects [6,7], and the transfer power is relatively low, but if corresponding treatments are done beforehand, the electric field coupling mode will find suitable applications. According to the transfer distance, the magnetic field coupling mode can be mainly classified into short-range electromagnetic induction and mid-range SCMR.…”

Section: Introductionmentioning

confidence: 99%

A Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances

2014

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Strongly coupled magnetic resonance (SCMR), proposed by researchers at MIT in 2007, attracted the world's attention by virtue of its mid-range, non-radiative and high-efficiency power transfer. In this paper, current developments and research progress in the SCMR area are presented. Advantages of SCMR are analyzed by comparing it with the other wireless power transfer (WPT) technologies, and different analytic principles of SCMR are elaborated in depth and further compared. The hot research spots, including system architectures, frequency splitting phenomena, impedance matching and optimization designs are classified and elaborated. Finally, current research directions and development trends of SCMR are discussed.

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Section: Introductionmentioning

confidence: 99%

A Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances

2014

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“…Nikola Tesla, in the late 19th century, successfully developed WPT-based apparatuses and did several public demonstrations. However, Tesla mostly used inductive WPT for exciting large secondary coils and generating high electric voltages and oscillating electrostatic fields, in lightening experiments, in such a way that the dominating power transfer mechanism in these experiments was capacitive [7]. Seeking wireless power transmission, later on he apparently concentrated in the development of far field technology (radio waves), which eventually gained public attention much faster in communications applications, rather than power transfer applications [8].…”

Section: Introductionmentioning

confidence: 99%

Design of an Intrinsically Safe Series-Series Compensation WPT System for Automotive LiDAR

et al. 2020

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The earliest and simplest impedance compensation technique used in inductive wireless power transfer (WPT) design is the series-series (SS) compensation circuit, which uses capacitors in series with both primary and secondary coils of an air-gapped transformer. Despite of its simplicity at the resonant condition, this configuration exhibits a major sensitivity to variations of the load attached to the secondary, especially when higher coupling coefficients are used in the design. In the extreme situation that the secondary coil is left at open circuit, the current at the primary coil may increase above the safety limits for either the power converter driving the primary coil or the components in the primary circuit, including the coil itself. An approach often used to minimize this problem is detuning, but this also reduces the electrical efficiency of the power transfer. In low power, fixed-distance stationary WPT, a fair trade-off between efficiency and safety must be verified. This paper aims to consolidate a simple design procedure for such a SS-compensation, exemplifying its use in the prototype of a WPT system for automotive light detection and ranging (LiDAR) equipment. The guidelines herein provided should equally apply to other low power applications.

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“…Unfortunately, very little scientific documentation exists that supports Tesla's claim of power transfer through the earth. Replications of his patents are observed to only operate in a close range where capacitive coupling between the transmitter and receiver are strong [21]. Tesla's long distance claims have yet to be reproduced and intense controversy remains on this subject.…”

Section: Introductionmentioning

confidence: 99%

Electrical excitation of the local earth for resonant, wireless energy transfer

et al. 2016

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Here we demonstrate wireless energy transfer that exploits the conductivity and permittivity of soil to create a potential gradient on the surface around an earthed electrode, distributing electrical energy over the area. This generated surface potential can be amplified using a special standing-wave receiver for harnessing the distributed energy. We have experimentally mapped the surface potential around the electrode and plotted the received energy covering an area of 1200 m 2 . Key operating parameters are determined with a discussion on optimizing the system efficiency. This technique could address the challenge of distributing electrical energy to many low power devices over large outdoor areas without the use of wires.

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Efficient wireless transmission of power using resonators with coupled electric fields

Cited by 29 publications

References 2 publications

A Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances

A Critical Review of Wireless Power Transfer via Strongly Coupled Magnetic Resonances

Design of an Intrinsically Safe Series-Series Compensation WPT System for Automotive LiDAR

Electrical excitation of the local earth for resonant, wireless energy transfer

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