Design and Optimization of Inductive Power Link for Biomedical Applications

Huang, Kejie; Zhou, Yin; Wu, Wentai; Yang, Zhi

doi:10.5772/18562

Cited by 2 publications

(1 citation statement)

References 39 publications

(30 reference statements)

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“…This model is selected because of the practical usability for fast parameter estimation by measurements, which will be explained in Appendix A. However, there is a lot of literature and research on theoretical models, for the estimation of the self-capacitance in [13], the calculation of proximity effects in [14] or the distributive equivalent model of a coil in [15,16].…”

Section: Physical Coil Impedance Modelmentioning

confidence: 99%

Electromagnetic Analysis, Characterization and Discussion of Inductive Transmission Parameters for Titanium Based Housing Materials in Active Medical Implantable Devices

et al. 2018

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The growing demand for active medical implantable devices requires data and or power links between the implant and the outside world. Every implant has to be encapsulated from the body by a specific housing and one of the most common materials used is titanium or titanium alloy. Titanium thas the necessary properties in terms of mechanical and chemical stability and biocompatibility. However, its electrical conductivity presents a challenge for the electromagnetic transmission of data and power. The proposed paper presents a fast and practical method to determine the necessary transmission parameters for titanium encapsulated implants. Therefore, the basic transformer-transmission-model is used with measured or calculated key values for the inductances. Those are then expanded with correction factors to determine the behavior with the encapsulation. The correction factors are extracted from finite element method simulations. These also enable the analysis of the magnetic field distribution inside of the housing. The simulated transmission properties are very close to the measured values. Additionally, based on lumped elements and magnetic field distribution, the influential parameters are discussed in the paper. The parameter discussion describes how to enhance the transmitted power, data-rate or distance, or to reduce the size of the necessary coils. Finally, an example application demonstrates the usage of the methods.

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Section: Physical Coil Impedance Modelmentioning

confidence: 99%

Electromagnetic Analysis, Characterization and Discussion of Inductive Transmission Parameters for Titanium Based Housing Materials in Active Medical Implantable Devices

et al. 2018

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A simple method to determine the performance of two-coil wireless power transfer systems without direct output measurement

Garcia

Abatti

2021

International Journal of Electronics

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Two-coil wireless power transfer (WPT) systems are composed of two circuits tuned at the same resonance frequency, one containing the source, and other containing the load, both connected to each other by the mutual inductance. The power delivered to the load circuit (𝑷 𝑶 ) divided by the total power supplied by the source (𝑷 𝑻 ) and by the maximum ideal amount of power which can be delivered to the load circuit are usual figures of merit known as efficiency (𝜼) and power transfer capability (𝑷 * ), respectively. Additionally, it can be defined a third figure of merit (𝑰 * ) as the power dissipated at the source circuit divided by 𝑷 𝑻 .It has been recently demonstrated that 𝜼 and 𝑷 * are related to 𝑰 * . In this paper, it is presented a simple method to monitor 𝑰 * , allowing consequently the determination of 𝜼 and/or 𝑷 * without any direct measurement at the load circuit. The qualities and limitations of the proposed method are discussed in details. Practical results are included to verify the proposal.Index Terms-Wireless power transfer, inductive power transfer, figures of merit, efficiency, power transfer capability. I. INTRODUCTIONIRELESS power transfer (WPT) systems via inductive coupling was first reported by Tesla more than a century ago [1]. The simplest WPT systems are composed of only two resonant circuits tuned at the same resonance frequency, one containing the source, and other containing the load, which are magnetically connected by the mutual inductance. Due to its safety, flexibility, and reliability, WPT systems have become a key technology in several fields, such as, for instance, power charging electric vehicles and implantable medical devices [2]-[7].

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Design and Optimization of Inductive Power Link for Biomedical Applications

Cited by 2 publications

References 39 publications

Electromagnetic Analysis, Characterization and Discussion of Inductive Transmission Parameters for Titanium Based Housing Materials in Active Medical Implantable Devices

Electromagnetic Analysis, Characterization and Discussion of Inductive Transmission Parameters for Titanium Based Housing Materials in Active Medical Implantable Devices

A simple method to determine the performance of two-coil wireless power transfer systems without direct output measurement

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