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Wireless Power Transfer for Wearable...

Truong, Binh Duc,

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Wireless Power Transfer for Wearable and Implantable Medical Devices /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Wireless Power Transfer for Wearable and Implantable Medical Devices // Binh Duc Truong.
Author:	Truong, Binh Duc,
Description:	1 electronic resource (119 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
Contained By:	Dissertations Abstracts International84-04B.
Subject:	Mechanical engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28416804
ISBN:	9798351459189

Wireless Power Transfer for Wearable and Implantable Medical Devices /
Truong, Binh Duc,

Wireless Power Transfer for Wearable and Implantable Medical Devices /Binh Duc Truong. - 1 electronic resource (119 pages)

Source: Dissertations Abstracts International, Volume: 84-04, Section: B.

Biomedical implantable devices for health monitoring and therapeutic treatment have become more and more ubiquitous in human modern life. However, batteries can only power the implant for a certain amount of time and usually require surgical intervention for replacement. On the contrary, wireless power transfer (WPT) technology can provide a continuous and stable supply of power, making it an excellent alternative solution for powering bioelectronics. Methods for WPT include acoustic, capacitive coupling, and magnetic waves. This work will explore the utilization of magnetic waves for WPT to biomedical implants. Along with delivering sufficient power to maintain the system operation, the safety standards, which constraints the maximum allowable magnetic field strength that can be applied to the human body, are essential factors for consideration.One of the most important objectives of the dissertation is to comprehend the fundamental dynamics, performance and limitations on transmitted power of different magnetic to electric energy conversion mechanisms. Throughout the study, theoretical modeling and power optimization are thoroughly investigated and validated with rigorous experiments. Although motivated by bioapplications, the developed models could also be used as a framework for further research in the field of wireless power transfer in general.The first structure of interest is two-coil resonant inductive coupling (RIC) wireless power transfer system (WPTS), which is perhaps the most widely used technique in the literature. Under some circumstances, the influence of the parasitic capacitance of the coil on the dynamics cannot be neglected. The system now exhibits both resonance and antiresonance frequencies. This characteristic leads to different optimal choices of drive frequency in the weak coupling regime, depending on the electrical load.Since the operating frequency of RIC devices is typically in the range of MHz, the allowable field could be as low as a few tens of μT, which significantly limits the power available for transfer. We then consider a magneto-mechano-electric (MME) architecture consisting of a piezoelectric transducer with a magnet tip mass as a receiver. Based on the transverse vibration resulting from the interaction between the applied field and magnets, this configuration usually operates at a frequency below 1 kHz. In this case, the maximum permissible magnetic flux density may be up to several mT, making the method attractive. However, its disadvantages include weak coupling of the magnetic and mechanical domains, which leads to extremely low transmission efficiency (< 10-2%), and the employment of magnets could pose difficulties for miniaturization.In order to compromise between the frequency of operation (with the aim to increase the permitted magnetic field amplitude) and the coupling strength, we propose to utilize a magnetoelectric composite consisting of magnetostrictive and piezoelectric phases as a receiver. For the first time, the potential of this mechanism in a WPTS is comprehensively analyzed. The performance of a ME-based WPTS is also evaluated taking into account several practical uncertainties such as alignment, orientation, and the effects of the field non-uniformity. A receiver prototype is constructed with Galfenol and PZT for experimental investigations. A maximum transferred-power of 4.91 mW is achieved at a distance of 30 mm between the centers of a circular coil transmitter and the ME receiver with the corresponding magnetic flux density of 225.8 μT. This amount of power represents a sufficient supply for most biosensors.

English

ISBN: 9798351459189Subjects--Topical Terms:

649730
Mechanical engineering.
Subjects--Index Terms:

Biomedical implantable devices

Wireless Power Transfer for Wearable and Implantable Medical Devices /
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100 1 $a Truong, Binh Duc, $e author. $3 3823789
245 1 0 $a Wireless Power Transfer for Wearable and Implantable Medical Devices / $c Binh Duc Truong.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 1 electronic resource (119 pages)
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500 $a Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
500 $a Advisors: Roundy, Shadrach J. Committee members: Mascaro, Stephen A.; Leang, Kam K.; Furse, Cynthia M.; Young, Darrin J.
502 $b Ph.D. $c The University of Utah $d 2021.
520 $a Biomedical implantable devices for health monitoring and therapeutic treatment have become more and more ubiquitous in human modern life. However, batteries can only power the implant for a certain amount of time and usually require surgical intervention for replacement. On the contrary, wireless power transfer (WPT) technology can provide a continuous and stable supply of power, making it an excellent alternative solution for powering bioelectronics. Methods for WPT include acoustic, capacitive coupling, and magnetic waves. This work will explore the utilization of magnetic waves for WPT to biomedical implants. Along with delivering sufficient power to maintain the system operation, the safety standards, which constraints the maximum allowable magnetic field strength that can be applied to the human body, are essential factors for consideration.One of the most important objectives of the dissertation is to comprehend the fundamental dynamics, performance and limitations on transmitted power of different magnetic to electric energy conversion mechanisms. Throughout the study, theoretical modeling and power optimization are thoroughly investigated and validated with rigorous experiments. Although motivated by bioapplications, the developed models could also be used as a framework for further research in the field of wireless power transfer in general.The first structure of interest is two-coil resonant inductive coupling (RIC) wireless power transfer system (WPTS), which is perhaps the most widely used technique in the literature. Under some circumstances, the influence of the parasitic capacitance of the coil on the dynamics cannot be neglected. The system now exhibits both resonance and antiresonance frequencies. This characteristic leads to different optimal choices of drive frequency in the weak coupling regime, depending on the electrical load.Since the operating frequency of RIC devices is typically in the range of MHz, the allowable field could be as low as a few tens of μT, which significantly limits the power available for transfer. We then consider a magneto-mechano-electric (MME) architecture consisting of a piezoelectric transducer with a magnet tip mass as a receiver. Based on the transverse vibration resulting from the interaction between the applied field and magnets, this configuration usually operates at a frequency below 1 kHz. In this case, the maximum permissible magnetic flux density may be up to several mT, making the method attractive. However, its disadvantages include weak coupling of the magnetic and mechanical domains, which leads to extremely low transmission efficiency (< 10-2%), and the employment of magnets could pose difficulties for miniaturization.In order to compromise between the frequency of operation (with the aim to increase the permitted magnetic field amplitude) and the coupling strength, we propose to utilize a magnetoelectric composite consisting of magnetostrictive and piezoelectric phases as a receiver. For the first time, the potential of this mechanism in a WPTS is comprehensively analyzed. The performance of a ME-based WPTS is also evaluated taking into account several practical uncertainties such as alignment, orientation, and the effects of the field non-uniformity. A receiver prototype is constructed with Galfenol and PZT for experimental investigations. A maximum transferred-power of 4.91 mW is achieved at a distance of 30 mm between the centers of a circular coil transmitter and the ME receiver with the corresponding magnetic flux density of 225.8 μT. This amount of power represents a sufficient supply for most biosensors.
546 $a English
590 $a School code: 0240
650 4 $a Mechanical engineering. $3 649730
650 4 $a Electrical engineering. $3 649834
650 4 $a Applied physics. $3 3343996
653 $a Biomedical implantable devices
690 $a 0548
690 $a 0544
690 $a 0215
710 2 $a The University of Utah. $b Mechanical Engineering. $e degree granting institution. $3 3823790
720 1 $a Roundy, Shadrach J. $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 84-04B.
790 $a 0240
791 $a Ph.D.
792 $a 2021
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28416804