Wireless Power Transmission for Implantable Medical Devices Using Focused Ultrasound and a Miniaturized 1-3 Piezoelectric Composite Receiving Transducer

Yi, Xiyuan; Zheng, Weicheng; Cao, Hua; Wang, Shenggeng; Feng, Xiaoli; Yang, Zengtao

doi:10.1109/tuffc.2021.3103099

Cited by 23 publications

(10 citation statements)

References 45 publications

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“…Traditional 1–3 piezoelectric composites have been widely used in underwater transducers, medical devices, navigation and aerospace [ [1] , [2] , [3] , [4] ], especially as the important part of high-frequency acoustic emission transducers [ [5] , [6] , [7] , [8] , [9] ]. These high-frequency transducers are usually operated continuously with high power.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of highly thermally conductive 1-1-3 piezoelectric composites

Liu,

Zhang,

Qin

2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Design and fabrication of highly thermally conductive 1-1-3 piezoelectric composites

Liu,

Zhang,

Qin

2024

Heliyon

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“…), and the application scenarios are more varied. Therefore, it is widely studied for many applications, such as biomedicine [1], underwater devices [2], smart homes [3], and electric vehicles [4], [5]. Double-sided LCC compensation topology is widely used in WPT systems in various fields because of its advantages of better tolerance to mutual inductance, frequency, load and other parameter changes, and higher design freedom [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Robust optimization of double-sided LCC compensation topology based on NSGAⅡ algorithm

Cui,

Du,

Zhao

et al. 2023

5th International Conference on Information Science, Electrical, and Automation Engineering (ISEAE 2023)

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In this paper, a compensation network parameter design method based on multi-objective optimization algorithm has been proposed to meet the robust requirements of the output characteristics of wireless power transfer (WPT) system under non-resonant conditions. The equivalent circuit mathematical model of WPT system under non-resonant condition is established, and the sensitivity of system output characteristics to different component parameters is analyzed. A compensatory topology parameter optimization method of double-sided LCC based on NSGAII algorithm is proposed, which effectively reduces the system output power fluctuation when multiple parameters fluctuate together, improves the output characteristics of the double-sided LCC WPT system, and enhances the robustness of the system output. Finally, the proposed method is validated by comparing the power variation before and after the system parameter optimization under the condition of multi-parameter combined fluctuation and the condition of sensitive parameter random fluctuation. It has lower power variation when component parameter fluctuates randomly and it improves the controllability of the system to a certain extent.

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“…Moreover, the size of the receiving transducer is large, which is not suitable for implantation. A method of combining focused ultrasound with a miniaturized 1-3 piezoelectric composite receiving transducer to produce higher electrical power was discussed in [32]. An output power of 60 mW at a distance of 150 mm is obtained with this technique.…”

Section: Introductionmentioning

confidence: 99%

Charging Current Characteristics and Effect of Casing Material in Wireless Recharging of Active Implantable Medical Devices Using Transcutaneous Energy Transfer System

Nair,

Muniyandi,

D S

et al. 2023

PIER M

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Batteries inside an active implantable medical device (AIMD) need to be replaced every few years. However, rechargeable batteries can enhance the life of such devices to a large extent. Transcutaneous Energy Transfer System (TETS) is a promising method for recharging these batteries inside medical devices. These devices are generally made of metal casings to avoid fluid ingress and provide better mechanical strength. However, the metal cases when being present in the path of electromagnetic energy induces eddy current thus producing excessive temperature rise due to thermal loss. Thus, the selection of an interface casing material plays a significant role in the performance of the wireless recharging. In this paper, the performance of a transcutaneous energy transfer system for recharging an AIMD with different axial gaps and casing materials is reported. The effect of these variations on the output voltage, recharge current, and efficiency of operation was quantified. It has been found that, with TETS the charging current of 0.3 A to 0.5 A can be obtained to charge the implanted battery within 180 minutes. It was found that the induced voltage in the secondary coil is substantially reduced with the presence of titanium casing compared to epoxy encapsulation. Thermal studies were performed with titanium casing material of various thicknesses. The casing temperature rose to above 70 • C within the first 10 minutes for 0.5 mm thickness and within 50 minutes in the case of 0.25 mm. With epoxy encapsulation, the casing temperature rose to only 30 • C. The charging voltage of 5 V and charging current of more than 0.3 A were obtained with epoxy encapsulation. A polymeric material casing or epoxy encapsulation is the best choice in the interface region to get a high recharging current in the case of wireless recharging of implantable medical devices. With the proposed design modification, wireless energy transfer and recharging implanted batteries shall be done in a more energy-efficient manner with less thermal damage to nearby tissues.

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Wireless Power Transmission for Implantable Medical Devices Using Focused Ultrasound and a Miniaturized 1-3 Piezoelectric Composite Receiving Transducer

Cited by 23 publications

References 45 publications

Design and fabrication of highly thermally conductive 1-1-3 piezoelectric composites

Design and fabrication of highly thermally conductive 1-1-3 piezoelectric composites

Robust optimization of double-sided LCC compensation topology based on NSGAⅡ algorithm

Charging Current Characteristics and Effect of Casing Material in Wireless Recharging of Active Implantable Medical Devices Using Transcutaneous Energy Transfer System

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