Geometry Optimization Approaches of Inductively Coupled Printed Spiral Coils for Remote Powering of Implantable Biomedical Sensors

Mehri, Sondos; Ammari, Ahmed Chiheb; Slama, Jaleleddine Ben Hadj; Rmili, Hatem

doi:10.1155/2016/4869571

Cited by 17 publications

(13 citation statements)

References 27 publications

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“…Moreover, additional values were calculated when using tube and wire coils. Equation ( 14) must be calculated to identify the factor parameter (ϕ), outer diameter of the coil (d out /mm), inner diameter (d in ) and to find the most suitable number of turns for each coil [41]; it ranges from 0 to 1.…”

Section: Wpt Coil Mathematical Modelmentioning

confidence: 99%

Wireless Drone Charging Station Using Class-E Power Amplifier in Vertical Alignment and Lateral Misalignment Conditions

et al. 2022

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Recent major advancements in drone charging station design are related to the differences in coil design between the material (copper or aluminum) and inner thickness (diameter design) to address power transfer optimization and increased efficiency. The designs are normally challenged with reduced weight on the drone’s side, which can lead to reduced payload or misalignment position issues between receiver and transmitter, limiting the performance of wireless charging. In this work, the coil combination was tested in vertical alignment from 2 cm to 50 cm, and in lateral misalignment positions that were stretched across 2, 5, 8, 10, and 15 cm ranges. Simulated and experimental results demonstrated improved transfer distances when the drone battery load was 100 Ω. With the proposed design, the vertical transfer power that was achieved was 21.12 W, 0.460 A, with 81.5% transfer efficiency, while the maximum lateral misalignment air gap that was achieved was 2 cm with 19.22 W and 74.15% efficiency. This study provides evidence that the developed circuit that is based on magnetic resonant coupling (MRC) is an effective technique towards improving power transfer efficiency across different remote and unmanned Internet of Things (IoT) applications, including drones for radiation monitoring and smart agriculture.

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Section: Wpt Coil Mathematical Modelmentioning

confidence: 99%

Wireless Drone Charging Station Using Class-E Power Amplifier in Vertical Alignment and Lateral Misalignment Conditions

et al. 2022

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“…Improving this parameter leads to minimize the electromagnetic heating of the tissue, the interference with other devices, and imperatively the safety of the patient. The quality factor of an unloaded (PSC) can be expressed as [32]: (19) with w n is the angular frequency, L n is the inductor of the coil and R n is the parasitic resistance. Q is related to the parasitic resistance and the capacitance of the inductor.…”

Section: Iterative Design Procedures For the Coil Optimizationmentioning

confidence: 99%

A Modified Wireless Power Transfer System for Medical Implants

et al. 2019

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Wireless Power Transfer (WPT) is a promising technique, yet still an experimental solution, to replace batteries in existing implants and overcome the related health complications. However, not all techniques are adequate to meet the safety requirements of medical implants for patients. Ensuring a compromise between a small form factor and a high Power Transfer Efficiency (PTE) for transcutaneous applications still remains a challenge. In this work, we have used a resonant inductive coupling for WPT and a coil geometry optimization approach to address constraints related to maintaining a small form factor and the efficiency of power transfer. Thus, we propose a WPT system for medical implants operating at 13.56 MHz using high-efficiency Complementary Metal Oxide-Semiconductor (CMOS) components and an optimized Printed Circuit Coil (PCC). It is divided into two main circuits, a transmitter circuit located outside the human body and a receiver circuit implanted inside the body. The transmitter circuit was designed with an oscillator, driver and a Class-E power amplifier. Experimental results acquired in the air medium show that the proposed system reaches a power transfer efficiency of 75.1% for 0.5 cm and reaches 5 cm as a maximum transfer distance for 10.67% of the efficiency, all of which holds promise for implementing WPT for medical implants that don’t require further medical intervention, and without taking up a lot of space.

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“…When L T and L R are the self-inductance of the external coil and implanted coil, respectively. The resistors R 1 , R 2 represent the equivalent series resistance of the primary and secondary coils, respectively, (C T ) and (C R ) are the resonant capacitors in the external and implanted circuit, respectively, and R load is the implanted resistance [14]. The load R load represents the rectifier and additional power electronics.…”

Section: Inductive Link Resonant Proposedmentioning

confidence: 99%

“…where d out is outer diameter and d in inner diameters of the coil. The outer diameters of the external and implant coils, is expressed by (14):…”

Section: Modeling Of Planer Spiral Square Coils 31 Inductance Calcumentioning

confidence: 99%

Design and Optimization of Inductively Coupled Spiral Square Coils for Bio-Implantable Micro-System Device

Lakhdari¹,

Mekkakia-Maaza²,

Dekmous³

2019

IJECE

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Due to the development of biomedical microsystems technologies, the use of wireless power transfer systems in biomedical application has become very largely used for powering the implanted devices. The wireless power transfer by inductive resonance coupling link, is a technic for powering implantable medical devices<strong> </strong>(IMDs) between the external and implanted circuits. In this paper we describe the design of an inductive resonance coupling link using for powering small bio-implanted devices such as implantable bio-microsystem, peacemaker and cochlear implants. We present the reduced design and an optimization of small size obtained spiral coils of a 9.5 mm<sup>2</sup> implantable device with an operating frequency of 13.56 MHz according to the industrial scientific-medical (ISM). The model of the inductive coupling link based on spiral square coils design is developed using the theoretical analysis and optimization geometry of an inductive link. For a mutual distance between the two coils at 10mm, the power transfer efficiency is about 79% with , coupling coefficient of 0.075 and a mutual inductance value of 2µH. In comparison with previous works, the results obtained in this work showed better performance such as the weak inter coils distance, the hight efficiency power transfer and geometry.

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Geometry Optimization Approaches of Inductively Coupled Printed Spiral Coils for Remote Powering of Implantable Biomedical Sensors

Cited by 17 publications

References 27 publications

Wireless Drone Charging Station Using Class-E Power Amplifier in Vertical Alignment and Lateral Misalignment Conditions

Wireless Drone Charging Station Using Class-E Power Amplifier in Vertical Alignment and Lateral Misalignment Conditions

A Modified Wireless Power Transfer System for Medical Implants

Design and Optimization of Inductively Coupled Spiral Square Coils for Bio-Implantable Micro-System Device

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