Contactless energy transfer through air by means of ultrasound

Roes, M. G. L.; Hendrix, M.A.M.; Duarte, J.L.

doi:10.1109/iecon.2011.6119486

Cited by 37 publications

(26 citation statements)

References 17 publications

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“…Thus, to obtain a focused beam, the transducers should be excited with a high frequency signal. However the attenuation of the wave increases as the frequency increases [3]. Therefore, an optimal frequency exists which minimizes the combination of attenuation and diffraction losses.…”

Section: B Wave Propagationmentioning

confidence: 98%

“…An efficient piezoelectric transducer driving circuit and rectifying circuit was also proposed for low power applications in [7]. A majority of the prior arts [3,5,6] have used a signal generator cascaded to a linear power amplifier to drive the transducer at high power, which is inefficient and inappropriate for practical applications. This paper investigates the underlying factors of an AET system and presents the results from an experimental AET system for transferring power through conductive media.…”

Section: A State-of-the-art Aet Systemsmentioning

confidence: 99%

“…The limited operation duration was due to heat buildup of the transducers as well as the medium. Another AET system was developed by Roes [3] to observe the capability of power transfer through air. At a distance of 1m, Roes successfully transferred 37 W with an efficiency of 16%.…”

Section: A State-of-the-art Aet Systemsmentioning

confidence: 99%

“…For an AET system, the distance between the primary and pickup transducers can be several orders larger than the dimension of the transducers for a given directionality of the transmitter, therefore miniaturization of the system is plausible [4]. AET will also be favorable in electromagnetic-free situations and in places where a small system with high directionality and long transmission distance is required [1,3]. Therefore, AET can be useful in biomedical applications powering miniaturized sensors and in applications such as submarine and spacecraft hulls, gas pipelines and other sealed vessels, where power transfer through metal is necessary.…”

Section: Introductionmentioning

confidence: 98%

“…Large coupling distances are difficult to achieve because the capacitance of the coupling plates is very small, therefore high voltages and high frequencies are required to transfer a reasonable amount of power. Consequently this leads to high losses in the driving power electronics [3].…”

Section: Introductionmentioning

confidence: 99%

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Wireless electric power transfer based on Acoustic Energy through conductive media

Leung

Willis

2014

2014 9th IEEE Conference on Industrial Electronics and Applications

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This paper presents the development of a new wireless electric power transfer technique named Acoustic Energy Transfer (AET). Sound waves are utilized to transfer energy through metal barriers without direct-wired connections. Factors influencing the performance of AET are investigated, and a prototype AET system is developed. The prototype demonstrated that 62W of power can be transferred across a 70mm thick aluminum block at an efficiency of 74% when the system operates at the resonant frequency of the transducer (28kHz). These experimental results are very promising for practical applications where power transfer is needed across metal barriers. Suggestions for further development on AET systems are also presented.

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Section: B Wave Propagationmentioning

confidence: 98%