Wireless electric power transfer based on Acoustic Energy through conductive media

Leung, Ho Fai; Willis, Brett J.; Hu, Aiguo Patrick

doi:10.1109/iciea.2014.6931416

Cited by 18 publications

(3 citation statements)

References 7 publications

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“…Application for this technology is primarily in low-power biomedical implant devices (mW) [40]. Medium-and high-power transfer of 62 W and 1 kW has been achieved although at non-air, small transmission distance of 70 and 5 mm, respectively [41,42]. These are targeted toward sealed environments such as containers with hazardous objects [42].…”

Section: Wireless Power Transfer 177mentioning

confidence: 99%

Limitations of wireless power transfer technologies for mobile robots

2019

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Advances in technology have seen mobile robots becoming a viable solution to many global challenges. A key limitation for tetherless operation, however, is the energy density of batteries. Whilst significant research is being undertaken into new battery technologies, wireless power transfer may be an alternative solution. The majority of the available technologies are not targeted toward the medium power requirements of mobile robots; they are either for low powers (a few Watts) or very large powers (kW). This paper reviews existing wireless power transfer technologies and their applications on mobile robots. The challenges of using these technologies on mobile robots include delivering the power required, system efficiency, human safety, transmission medium, and distance, all of which are analyzed for robots operating in a hazardous environment. The limitations of current wireless power technologies to meet the challenges for mobile robots are discussed and scenarios which current wireless power technologies can be used on mobile robots are presented.

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Section: Wireless Power Transfer 177mentioning

confidence: 99%

Limitations of wireless power transfer technologies for mobile robots

2019

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“…However, 16 W can be generated using 40 mm 2 active piezo area with a maximum efficiency of 1.4 × 10 −7 . At the same time, Leung et al developed a prototype based om AET system specifically for conductive media [88]. This prototype was able to transfer 62 W power through a 70 mm thick aluminum block with 74% efficiency, when operated at the resonant frequency of 28 kHz.…”

Section: Developments Of Aetmentioning

confidence: 99%

State-of-the-Art Developments of Acoustic Energy Transfer

Awal

Jusoh

Sabapathy

et al. 2016

International Journal of Antennas and Propagation

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Acoustic energy transfer (AET) technology has drawn significant industrial attention recently. This paper presents the reviews of the existing AETs sequentially, preferably, from the early stage. From the review, it is evident that, among all the classes of wireless energy transfer, AET is the safest technology to adopt. Thus, it is highly recommended for sensitive area and devices, especially implantable devices. Though, the efficiency for relatively long distances (i.e., >30 mm) is less than that of inductive or capacitive power transfer; however, the trade-off between safety considerations and performances is highly suitable and better than others. From the presented statistics, it is evident that AET is capable of transmitting 1.068 kW and 5.4 W of energy through wall and in-body medium (implants), respectively. Progressively, the AET efficiency can reach up to 88% in extension to 8.6 m separation distance which is even superior to that of inductive and capacitive power transfer.

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“…Based on a simulation parametric analysis, Liu, et al [16] evaluated the impact of piezoelectric transducer radius and thickness on transfer efficiency in a solid propagation medium for AET systems. To optimize the output power of the AET system, Leung, et al [17] conducted a parametric analysis to investigate the influence of the aluminum barrier size on the transferred power. However, the parametric optimization analysis was not conducted on the components of the system as a whole.…”

Section: Introductionmentioning

confidence: 99%

Acoustic energy transfer using piezoelectric transducers

Zhang

Tang

et al. 2023

Active and Passive Smart Structures and Integrated Systems XVII

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Acoustic energy transfer (AET) is considered to be a promising technology without electromagnetic interference and safety issue compared to other wireless power transfer methods, especially for biomedical applications. In this paper, an AET system using piezoelectric transducers is modelled by equivalent circuit representation and finite element method, which in general give consistent results. A parametric study is then conducted to understand the influence of the sizes of barrier and piezoelectric transducers as well as the load resistance on the performance of the AET system. It is found that the area of the barrier has negligible impact on the performance, but the thickness of the barrier does, and the thinner barrier is favorable. In addition, it is found that a transfer efficiency of over 90% can be achieved if the transducers are optimized with thickness of 1.8-2.0 mm and the diameter of 24 to 26 mm. As the load resistance increases from 5 Ω to 400 Ω, the maximum efficiency of about 90% is achieved with a medium load resistance. These findings provide useful guidelines for AET system design.

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Wireless electric power transfer based on Acoustic Energy through conductive media

Cited by 18 publications

References 7 publications

Limitations of wireless power transfer technologies for mobile robots

Limitations of wireless power transfer technologies for mobile robots

State-of-the-Art Developments of Acoustic Energy Transfer

Acoustic energy transfer using piezoelectric transducers

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