Distant Energy Transfer for Artificial Human Implants

Theodoridis, Michael P.; Mollov, S.V.

doi:10.1109/tbme.2005.856255

Cited by 42 publications

(19 citation statements)

References 10 publications

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“…When the power transfer distance d is 1 cm, the induced voltage reaches 840 mV. Based on the maximum power transfer theorem, the maximum available power P of the receiving coil can be estimated as [6]:…”

Section: Resultsmentioning

confidence: 99%

A rotating-magnet based wireless electrical power transfer for biomedical implants

Jiang

Zhang

Zhou

et al. 2010

2010 3rd International Conference on Biomedical Engineering and Informatics

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Transformer-based inductively coupled near-field wireless links have been extensively studied in the past three decades as a means of transferring power to implanted biomedical devices. Even with deliberative optimizations, the reported maximum transferred power is limited to 275 mW over 1-cm[1]. In this paper, a novel wireless power transfer link is described that uses a rotating magnet to transfer power. The rotatingmagnet-based power transfer link is able to deliver 678 mW over a 1-cm distance wirelessly. The advantages of this new method are briefly analyzed by comparing with the existing transformerbased power transfer links.

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Section: Resultsmentioning

confidence: 99%

A rotating-magnet based wireless electrical power transfer for biomedical implants

Jiang

Zhang

Zhou

et al. 2010

2010 3rd International Conference on Biomedical Engineering and Informatics

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“…A common practice has been to ignore the generation of magnetic field pattern by treating the two coils separately or to make use of empirical rules . 8,9 However, for the current application, where high coupling sensitivity and efficiency are needed, modelling and optimization of the complete system in the presence of human body simulant is necessary. As the transmitter coil is placed outside the body, there are fewer restrictions placed on its size.…”

Section: Transmitter Coil/antennamentioning

confidence: 99%

Wireless telemetry system for a SAW based microvalve

et al. 2008

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Inductively coupled RF telemetry is an optimal method for both power supply and data transmission in long term artificial implants due to small size, high reliability, and extended life span of the device. In this research, we propose the use of the same technique for secure remote interrogation and powering of a human implantable, Surface Acoustic Wave (SAW) correlation based, passive microvalve. This is carried out by interrogating the microvalve with a Barker sequence encoded BPSK signal. In this paper we present the development of a FEM model for the derivation of the induced voltage on a miniature (2.5×2.5×1 mm), inductively coupled, biocompatible spiral antenna/coil, interrogated by a 7.5×7.5×0.2 cm spiral antenna/coil in the near field. The amount of power transferred at a 30-160 MHz range was derived using the S 21 coupling response when the two antennas are separated by a human body simulant of 5 cm depth. Furthermore, the effect of varying magnetic coupling on the induced voltage, due to the misorientation of coils/antennas is analysed.

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“…Energy can be provided using a power wire which penetrates the skin, subjecting the patient to the risk of infection, or using the transmission of transcutaneous energy. In view of the infection problem, since the beginning of the 1960s, many studies have looked into inductive power transfer systems for artificial organs [1,7,9,10,12]. In the mid-1960s, John C. Schuder's group from the University of Missouri began to study inductive coupled-radio frequency systems for artificial hearts [10].…”

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confidence: 99%

“…Shinsuke Arai's group from Japan has performed many experiments on transcutaneous energy transmission systems for artificial hearts [1,7]. Stefan V. Mollov from the University of Birmingham has also carried out research into remote energy transfer for artificial human implants [12].…”

mentioning

confidence: 99%

Estimation of the Non-Measurable State Variables of a Transcutaneous Energy Transmission System for Artificial Human Implants Using Extended Kalman Filters

Liu

Tang

Wan

et al. 2009

Circuits Syst Signal Process

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Due to the separation of the two sides of the coupling network, the acquisition of data on the operating state variables of a transcutaneous energy transmission system (TETS) inside the human body is difficult. A non-measurable state estimation approach is used in this work to facilitate the estimation of non-measurable variables on the secondary side of the TETS, including the current of the secondary coil and the output voltage of the secondary side. The estimation algorithm is based on a discrete dynamic mathematical model of the TETS. Following this model, using the extended Kalman filter (EKF) algorithm, the complexity of the TETS for artificial human implants can be reduced, while the reliability is simultaneously enhanced. Additionally, as an adaptive filter, the EKF can also successfully filter out processing noise during energy transmission. All of the results are verified by simulation using MATLAB.

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Distant Energy Transfer for Artificial Human Implants

Cited by 42 publications

References 10 publications

A rotating-magnet based wireless electrical power transfer for biomedical implants

A rotating-magnet based wireless electrical power transfer for biomedical implants

Wireless telemetry system for a SAW based microvalve

Estimation of the Non-Measurable State Variables of a Transcutaneous Energy Transmission System for Artificial Human Implants Using Extended Kalman Filters

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