A Study on Ultrasonic Wireless Power Transfer With Phased Array for Biomedical Implants

Kashani, Zeinab; Kiani, Mehdi

doi:10.1109/tbcas.2023.3282197

Cited by 7 publications

(2 citation statements)

References 30 publications

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“…In the strong coupling region, there are two operating angle frequency solutions. Submitting Equation (5) to Equation ( 4), the operating angle frequency of the system in the strong coupling region can be solved as…”

Section: Output Voltage Characteristicmentioning

confidence: 99%

“…In particular, compared with magnetic inductive wireless power transfer (IPT), magnetically coupled resonant wireless power transfer (MCR-WPT) technology can transfer power in the middle distance and has significant advantages that have higher transfer efficiency and less electromagnetic interference caused by non-resonant frequencies [3]. Nowadays, MCR-WPT technology is applied to biomedical implants [4,5], mobile electronic products [6,7], electrical vehicles (EVs) [8,9], and other fields where wired contact is impossible or inconvenient.…”

Section: Introductionmentioning

confidence: 99%

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Autonomous Wireless Power Transfer System with Constant Output Voltage in a Wide Load Range

Jiang,

Zhao,

Chen

et al. 2023

Energies

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In this paper, an autonomous wireless power transfer (WPT) system with constant voltage output in a wide load range is presented. Here, combining self-oscillating control and phase-shift control, a new implementation of the autonomous WPT system is proposed. The proposed autonomous WPT system operates using a self-oscillating control method in the strong coupling region, which can automatically maintain the constant output voltage. In the weak coupling region, a phase-shift control method with a fixed frequency and a variable duty cycle is implemented, and a control strategy based on output voltage estimation is proposed to obtain the constant output voltage. In addition, according to the operating frequency characteristic of the proposed autonomous WPT system, a corresponding coupling region judgment method is presented to guarantee the realization of switching between the two control methods. An experimental prototype with a 24 V output voltage is constructed to validate the practicability of the proposed method. The experimental results show the proposed autonomous WPT system can obtain constant output voltage in a wide load range.

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Section: Output Voltage Characteristicmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Autonomous Wireless Power Transfer System with Constant Output Voltage in a Wide Load Range

Jiang,

Zhao,

Chen

et al. 2023

Energies

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An Improved Magnetic Coupling Resonant Wireless Power Transfer System Based on Ferrite‐Nanocrystalline Hybrid Shielding Method

Hu,

Heng,

Zhang

et al. 2024

Circuit Theory & Apps

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Low‐power magnetic coupling resonant wireless power transfer (MCRWPT) systems are less efficient at long transmission distances due to magnetic leakage and losses. For this reason, combining ferrite‐nanocrystalline hybrid shielding and a relay coil, an improved MCRWPT system based on the LCC‐LCC compensation network is designed in this paper. Firstly, the transmission performance of the MCRWPT systems with S‐S and LCC‐LCC compensation networks are compared and analyzed. Secondly, the transfer efficiencies of the MCRWPT system are analyzed when the relay coil is added at different locations, and the transfer efficiencies of the system with single material shielding are compared. Finally, the transmission performance of the MCRWPT system with ferrite‐nanocrystalline hybrid shieling is analyzed using simulation and experiment. Experimental results show that the transfer efficiency of the low‐power MCRWPT system using relay coil and hybrid shielding increases from 40.38% to 69.17% when the input voltage is 40 V and the transmission distance is 250 mm. Compared with the MCRWPT system based on ferrite full shielding, the weight of the MCRWPT system has been reduced by 63.11%. The hybrid shielding method not only improves the transfer efficiency of the MCRWPT system and reduces its spatial magnetic leakage but also has certain cost advantages.

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Self-image-guided ultrasonic transceiver design for reliably powering mm-sized implants

Salahi,

Moezzi,

Kiani

2024

AEU - International Journal of Electronics and Communications

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A Study on Ultrasonic Wireless Power Transfer With Phased Array for Biomedical Implants

Cited by 7 publications

References 30 publications

Autonomous Wireless Power Transfer System with Constant Output Voltage in a Wide Load Range

Autonomous Wireless Power Transfer System with Constant Output Voltage in a Wide Load Range

An Improved Magnetic Coupling Resonant Wireless Power Transfer System Based on Ferrite‐Nanocrystalline Hybrid Shielding Method

Self-image-guided ultrasonic transceiver design for reliably powering mm-sized implants

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