Acoustic Energy Transfer: A Review

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

doi:10.1109/tie.2012.2202362

Cited by 182 publications

(108 citation statements)

References 32 publications

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“…As proved and explained in previous sections, the aluminium sheets' size for the CPT system is getting smaller by the existence of an impedance matching network, as shown in Figure 12. This is due to the recalculation of components values by using equations (8)(9)(10)(11)(12)(13)(14)(15) and by adding an extra capacitor as impedance matching, the desired output is achieved and maintained with smaller size of capacitive plates. The value of the capacitive coupling is initially 0.21m x 0.24m, which is equal to 4.07nF.…”

Section: Aluminium Sheets As Capacitive Couplingsmentioning

confidence: 99%

“…Other than CPT, Inductive Power Transfer (IPT) [1], [2] and Acoustic Energy Transfer (AET) are also available [3], [4], [5]. The major difference of these types of wireless power transfer system is in terms of the coupling between transmitter and receiver whereby CPT uses electric field propagation [6], [7] while IPT uses magnetic field transfer [8], [9] and propagation of sound waves is the method used in AET [10], [4].…”

Section: Introductionmentioning

confidence: 99%

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Design and Analysis of Capacitive Power Transfer System with and without the Impedance Matching Circuit

Rahman¹,

Saat²,

Yusop³

et al. 2017

IJPEDS

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This paper presents the design and analysis of a relatively new wireless power transfer technique using capacitive coupling, named Capacitive power transfer (CPT). In general, CPT system has been introduced as an attractive alternative to the former inductive coupling method. This is because CPT uses lesser number of components, simpler topology, enhanced EMI performance and better strength to surrounding metallic elements. In this work, aluminium sheet is used as a capacitive coupling at transmitter and receiver side. Moreover, a Class-E resonant inverter together with π1a impedance matching network has been proposed because of its ability to perform the dc-to-ac inversion well. It helps the CPT system to achieve maximum power transfer. The CPT system is designed and simulated by using MATLAB/Simulink software. The validity of the proposed concept is then verified by conducting a laboratory experimental of CPT system. The proposed system able to generate a 9.5W output power through a combined interface capacitance of 2.44nF, at an operating frequency of 1MHz, with 95.10% efficiency. The proposed CPT system with impedance matching network also allows load variation in the range of 20% from its nominal value while maintaining the efficiency over 90%. Keyword:Aluminum sheet Capacitive power transfer MATLAB simulink Wireless power transfer impedance matching

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Section: Aluminium Sheets As Capacitive Couplingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Capacitive Power Transfer System with and without the Impedance Matching Circuit

Rahman¹,

Saat²,

Yusop³

et al. 2017

IJPEDS

View full text Add to dashboard Cite

show abstract

“…A comparative simulation showed the efficiency of ultrasonic delivery to be an order of magnitude or higher than that of inductive systems, where the distance to the receiving element was more than a few times its diameter [48]. As a result a range of ultrasonic systems have been proposed or investigated for ultrasonic power delivery to medical implants as well as other devices [49].…”

Section: Ultrasonic Power Deliverymentioning

confidence: 99%

Energy Harvesting and Power Delivery

Yeatman

Mitcheson

2014

Body Sensor Networks

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As we have seen in previous chapters, the increasing miniaturisation and cost reduction of sensors, circuits and wireless communication components is creating new possibilities for networks of wireless sensors, in wearable and other applications. However, in order for sensors to be wireless, or untethered, this requires not only wireless communication to and from the nodes, but also wireless powering. Batteries, of course, provide this capability in the great majority of portable electronic devices, and thus are the obvious solution also for the wireless sensor node application. However, their need for replacement or recharging introduces a cost and convenience penalty which is already undesirable in larger devices, and is becoming increasingly unacceptable for sensor nodes as the number of these (their ubiquity) grows. As an alternative, therefore, sources which harvest energy from the environment are very attractive. At the same time, the power demands of many electronic functions, wireless communication being a particularly important example in this context, are continuously falling. Although this lightens the demands for batteries, it also makes alternatives based on energy harvesting look more and more realistic.Where batteries can power a sensor node for its whole expected lifetime without maintenance, and without dominating the node cost or weight, this is likely to remain the favoured solution in most cases, although even there, energy harvesting methods have advantages to offer. The materials required in batteries are often toxic or environmentally unfriendly, adding to the burden of both bio-compatibility for implanted use and to the end-of-life disposal. Where a lifetime beyond what a battery can provide is needed, the "eternal" nature of the harvesting supply clearly becomes particularly favourable.

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“…One could use electromagnetic waves such as light or microwave radiation [1], or even pressure or sound waves to transfer energy from a source to a load [2]. In this work, we will focus on transferring energy through quasi-static fields.…”

Section: Introductionmentioning

confidence: 99%

Conjugate Image Theory Applied on Capacitive Wireless Power Transfer

Minnaert

Stevens

2017

Energies

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Wireless power transfer using a magnetic field through inductive coupling is steadily entering the market in a broad range of applications. However, for certain applications, capacitive wireless power transfer using electric coupling might be preferable. In order to obtain a maximum power transfer efficiency, an optimal compensation network must be designed at the input and output ports of the capacitive wireless link. In this work, the conjugate image theory is applied to determine this optimal network as a function of the characteristics of the capacitive wireless link, as well for the series as for the parallel topology. The results are compared with the inductive power transfer system. Introduction of a new concept, the coupling function, enables the description of the compensation network of both an inductive and a capacitive system in two elegant equations, valid for the series and the parallel topology. This approach allows better understanding of the fundamentals of the wireless power transfer link, necessary for the design of an efficient system.

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Acoustic Energy Transfer: A Review

Cited by 182 publications

References 32 publications

Design and Analysis of Capacitive Power Transfer System with and without the Impedance Matching Circuit

Design and Analysis of Capacitive Power Transfer System with and without the Impedance Matching Circuit

Energy Harvesting and Power Delivery

Conjugate Image Theory Applied on Capacitive Wireless Power Transfer

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