Optimization of planar strongly coupled wireless power transfer system for biomedical applications

Khan, Sadeque Reza; Choi, GoangSeog

doi:10.1002/mop.29934

Cited by 15 publications

(7 citation statements)

References 11 publications

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“…The optimization methodology of NRMRC follows a similar approach to NRIC. In [67,140,141] and [137,142], L is calculated using Equations (6) and (8), and M ij is determined using (9) and (11). The calculation of the AC resistance and parasitic capacitance of WWCs uses Equations (17) and (22), respectively [115,116,122].…”

Section: Optimizationmentioning

confidence: 99%

“…The calculation of the AC resistance and parasitic capacitance of WWCs uses Equations (17) and (22), respectively [115,116,122]. For PSCs, the same parameters are calculated using Equations (13), (18) and (19) [67,140,141]. The PTE of the three-coil-based system using lumped element analysis is derived as [136,143]:…”

Section: Optimizationmentioning

confidence: 99%

“…The optimization of NRMRC follows a similar methodology as the one presented in Figure 5 [67,75,82,137,140,141].…”

Section: Optimizationmentioning

confidence: 99%

See 2 more Smart Citations

Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Khan

Pavuluri

Cummins

et al. 2020

Sensors

220

109

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Wireless power transfer (WPT) systems have become increasingly suitable solutions for the electrical powering of advanced multifunctional micro-electronic devices such as those found in current biomedical implants. The design and implementation of high power transfer efficiency WPT systems are, however, challenging. The size of the WPT system, the separation distance between the outside environment and location of the implanted medical device inside the body, the operating frequency and tissue safety due to power dissipation are key parameters to consider in the design of WPT systems. This article provides a systematic review of the wide range of WPT systems that have been investigated over the last two decades to improve overall system performance. The various strategies implemented to transfer wireless power in implantable medical devices (IMDs) were reviewed, which includes capacitive coupling, inductive coupling, magnetic resonance coupling and, more recently, acoustic and optical powering methods. The strengths and limitations of all these techniques are benchmarked against each other and particular emphasis is placed on comparing the implanted receiver size, the WPT distance, power transfer efficiency and tissue safety presented by the resulting systems. Necessary improvements and trends of each WPT techniques are also indicated per specific IMD.

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Section: Optimizationmentioning

confidence: 99%

Section: Optimizationmentioning

confidence: 99%

See 1 more Smart Citation

Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Khan

Pavuluri

Cummins

et al. 2020

Sensors

220

109

View full text Add to dashboard Cite

show abstract

“…However, the lack of available small size batteries with sufficient capacity for continuous operation prevent their integration into todays CE [8,9]. Therefore, the most promising present alternative is the wireless power transfer (WPT) to the capsule from an external transmitter (TX) [10,11].…”

Section: Introductionmentioning

confidence: 99%

Towards a Miniaturized 3D Receiver WPT System for Capsule Endoscopy

Khan

Desmulliez

2019

Micromachines

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The optimization, manufacturing, and performance characterization of a miniaturized 3D receiver (RX)-based wireless power transfer (WPT) system fed by a multi-transmitter (multi-TX) array is presented in this study for applications in capsule endoscopy (CE). The 200 mm outer diameter, 35 μm thick printed spiral TX coils of 2.8 g weight, is manufactured on a flexible substrate to enable bendability and portability of the transmitters by the patients. The 8.9 mm diameter—4.8 mm long, miniaturized 3D RX—includes a 4 mm diameter ferrite road to increase power transfer efficiency (PTE) and is dimensionally compatible for insertion into current endoscopic capsules. The multi-TX is activated using a custom-made high-efficiency dual class-E power amplifier operated in subnominal condition. A resulting link and system PTE of 1% and 0.7%, respectively, inside a phantom tissue is demonstrated for the proposed 3D WPT system. The specific absorption rate (SAR) is simulated using the HFSSTM software (15.0) at 0.66 W/kg at 1 MHz operation frequency, which is below the IEEE guidelines for tissue safety. The maximum variation in temperature was also measured as 1.9 °C for the typical duration of the capsule’s travel in the gastrointestinal tract to demonstrate the patients’ tissues safety.

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“…The inverter is applied to invert the DC source into a sinusoidal source to provide a shifting current in the transmitter coil. In the previous research, the works about the WPT system almost focus on the coil design when the system is optimized [10][11][12]. In the system, the inverter circuit is too complicated to be optimized along with the coil system.…”

Section: Introductionmentioning

confidence: 99%

Optimal design and analysis of wireless power transfer system with converter circuit

Zhang

Yao

et al. 2017

J Wireless Com Network

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Wireless power transfer (WPT) technology has many applications by virtue of its intrinsic safety and convenience characteristics. This is particularly so when the WPT systems are used in conjunction with implanted medical devices, as they can greatly reduce the pain of patients and their financial burdens. In previous researches, the optimal system mainly focuses on the design of the coils which includes the transmitter coil and the receiver coil. In this paper, the WPT system will be optimized to include also the power source circuit and the load circuit, in addition to the coils, as an integral system. A simple circuit which converts the DC source into AC excitation as the feeding circuit is included in the WPT system. In this convert circuit, there are two inductors which can be formed by coils. In the WPT system, the two coils in the convert circuit are transmitter coils. In addition, the receiver coil should be optimized. Thus, the WPT system is constructed by the three coils. In this paper, the parameters in the convert circuit are considered along with the coil parameters in the optimization study.

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Optimization of planar strongly coupled wireless power transfer system for biomedical applications

Cited by 15 publications

References 11 publications

Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Towards a Miniaturized 3D Receiver WPT System for Capsule Endoscopy

Optimal design and analysis of wireless power transfer system with converter circuit

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