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

Awal, Rabiul; Jusoh, M.; Sabapathy, Thennarasan; Kamarudin, M. R.; Rahim, Rosemizi Abd

doi:10.1155/2016/3072528

Cited by 36 publications

(28 citation statements)

References 102 publications

(105 reference statements)

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“…Finally, power is supplied to the human implantable device through the receiving power processing module. The transmitting power module generally uses a power amplifying circuit [9][10][11][21][22][23] or an inverter circuit [7,8,13,[18][19][20] to supply power to the transmitting transducer, and the receiving power processing module mainly includes a rectifier circuit and a voltage-stabilizing circuit. Figure 1.…”

Section: Sound Field Modelmentioning

confidence: 99%

“…The ultrasonic coupling wireless power transmission can be applied to the metal environment or the demanding electromagnetic environment [8][9][10]. Therefore, the ultrasonic coupling wireless power transmission can make up for the shortage of the electromagnetic coupling wireless power transmission mode in the direction of power supply for implantable medical devices, and has broad application prospects [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Implantable Ultrasonic Coupling Wireless Power Transmission System

Yan¹,

Zhu²,

Liu³

et al. 2019

PIER M

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The research on implantable ultrasonic coupling wireless power transmission systems has not been systematically analyzed from the sound field theory, and the influencing factors of implanted ultrasonic coupling wireless power transmission systems based on the far-field model are proposed in this paper. Firstly, the far-field model is constructed. On this basis, the main factors affecting the ultrasonic energy transmission in the system are discussed. The COMSOL finite element simulation software was used to simulate the ultrasonic coupling wireless energy transmission system in human tissue environment, and the directivity of the energy transmission system was verified. The system experiment platform is built to analyze the energy transmission under different distances, different sound source frequencies, and different sound source excitations, and compare with the numerical simulation data. Finally, the influence of different factors on the energy transmission system is verified. It provides an effective reference for further research on implantable ultrasonic coupling wireless power transmission systems.

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Section: Sound Field Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Implantable Ultrasonic Coupling Wireless Power Transmission System

Yan¹,

Zhu²,

Liu³

et al. 2019

PIER M

View full text Add to dashboard Cite

show abstract

“…The waves propagate through a medium and then are collected by the receiving side transducer, which converts it back into electrical signals. The benefit of AWPT is that it can achieve higher power beam directivity than electromagnetic transmitter of the same size and the power is transferred omnidirectional which reduces the losses such as coil misalignment but the power transfer capability and efficiency of the AWPT is very less compared to other WPT systems [12,17,18]. In RIPT, the power transfer takes place between a transmitter coil and a receiver coil using electromagnetic induction.…”

Section: Introductionmentioning

confidence: 99%

LCC-S Based Discrete Fast Terminal Sliding Mode Controller for Efficient Charging through Wireless Power Transfer

et al. 2020

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Compared to the plug-in charging system, Wireless power transfer (WPT) is simpler, reliable, and user-friendly. Resonant inductive coupling based WPT is the technology that promises to replace the plug-in charging system. It is desired that the WPT system should provide regulated current and power with high efficiency. Due to the instability in the connected load, the system output current, power, and efficiency vary. To solve this issue, a buck converter is implemented on the secondary side of the WPT system, which adjusts its internal resistance by altering its duty cycle. To control the duty cycle of the buck converter, a discrete fast terminal sliding mode controller is proposed to regulate the system output current and power with optimal efficiency. The proposed WPT system uses the LCC-S compensation topology to ensure a constant output voltage at the input of the buck converter. The LCC-S topology is analyzed using the two-port network theory, and governing equations are derived to achieve the maximum efficiency point. Based on the analysis, the proposed controller is used to track the maximum efficiency point by tracking an optimal power point. An ultra-capacitor is connected as the system load, and based on its charging characteristics, an optimal charging strategy is devised. The performance of the proposed system is tested under the MATLAB/Simulink platform. Comparison with the conventionally used PID and sliding mode controller under sudden variations in the connected load is presented and discussed. An experimental prototype is built to validate the effectiveness of the proposed controller.

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“…It can achieve efficiency of up-to 80-90%. The drawback of microwave WPT is that, it suffers from microwave radiation that is unsafe [23].…”

Section: Introductionmentioning

confidence: 99%

A Review on Miniaturized Ultrasonic Wireless Power Transfer to Implantable Medical Devices

et al. 2019

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Wireless power transfer has experienced a rapid growth in recent years due to the need for miniature medical devices with prolonged operation lifetime. The current implants utilize onboard batteries as their main source of power. The use of batteries is not, however, ideal because they have constrained lifetime requiring periodic replacement. Energy can be supplied to the implantable devices through wireless power transfer approaches including inductive, ultrasonic, radio frequency, and heat. The implantable devices driven by energy harvesters can operate continuously, offering ease of use and maintenance. Inductive coupling is a conventional approach for the transmission of power to implantable devices. However, the inductive coupling approach is affected by tissue absorption losses inside the human body. To power implantable devices such as neural, cochlear, and artificial heart devices, the inductive coupling approach is being used. On the other hand, ultrasonic is an emerging approach for the transmission of power to implantable devices. The enhanced efficiency and low propagation loss make ultrasonic wireless power transfer an attractive approach for use with implantable devices. This paper presents a study on the inductive and ultrasonic wireless power transfer techniques used to power implantable devices. The inductive and ultrasonic techniques are analyzed from their sizes, operating distance, power transfer efficiency, output power, and overall system efficiency standpoints. The inductive coupling approach can deliver more power with higher efficiency compared to the ultrasonic technique. On the other hand, the ultrasonic technique can transmit power to longer distances. The advantages and disadvantages of both techniques as well as the challenges to implement them are discussed. INDEX TERMS Energy harvesting, implantable devices, wireless power transfer, inductive, ultrasonic, power transmission efficiency.

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

Cited by 36 publications

References 102 publications

Analysis of Implantable Ultrasonic Coupling Wireless Power Transmission System

Analysis of Implantable Ultrasonic Coupling Wireless Power Transmission System

LCC-S Based Discrete Fast Terminal Sliding Mode Controller for Efficient Charging through Wireless Power Transfer

A Review on Miniaturized Ultrasonic Wireless Power Transfer to Implantable Medical Devices

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