Ultrasonic transcutaneous energy transfer using a continuous wave 650 kHz Gaussian shaded transmitter

Shaul Ozeri, Doron Shmilovitz*, Sigmond Singer, Chua Chin Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

This paper proposes ultrasonic transcutaneous energy transfer (UTET) based on a kerfless transmitter with Gaussian radial distribution of its radiating surface velocity. UTET presents an attractive alternative to electromagnetic TET, where a low power transfer density of less than 94 mW/cm2 is sufficient. The UTET is operated with a continuous wave at 650 kHz and is intended to power devices implanted up to 50 mm deep. The transmitter was fabricated using a 15 mm diameter disc shape PZT (Lead Zirconate Titanate) element (C-2 grade, Fujiceramics Corporation Tokyo Japan), in which one surface electrode was partitioned into six equal area electrodes (∼23 mm2 each) in the shape of six concentric elements. The UTET was experimented using pig muscle tissue, and showed a peak power transfer efficiency of 39.1% at a power level of 100 mW. An efficient (91.8%) power driver for the excitation of the transmitter array, and an efficient rectifier (89%) for the implanted transducer are suggested. To obtain the pressure field shape, the Rayleigh integral has been solved numerically and the results were compared to finite element simulation results. Pressure and power transfer measurements within a test tank further confirm the effectiveness of the proposed UTET.

Original languageEnglish
Pages (from-to)666-674
Number of pages9
JournalUltrasonics
Volume50
Issue number7
DOIs
StatePublished - Jun 2010

Funding

FundersFunder number
Israel Ministry of Science and Technology3-4772

    Keywords

    • Ultrasonic transcutaneous energy transfer

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