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Proceedings Paper

High-power piezoelectric acoustic-electric power feedthru for metal walls
Author(s): Xiaoqi Bao; Will Biederman; Stewart Sherrit; Mircea Badescu; Yoseph Bar-Cohen; Christopher Jones; Jack Aldrich; Zensheu Chang
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Paper Abstract

Piezoelectric acoustic-electric power feed-through devices transfer electric power wirelessly through a solid wall using elastic waves. This approach allows for the elimination of the need for holes through structures for cabling or electrical feed-thrus . The technology supplies power to electric equipment inside sealed containers, vacuum or pressure vessels, etc where holes in the wall are prohibitive or may result in significant performance degradation or requires complex designs. In the our previous work, 100-W of electric power was transferred through a metal wall by a small, piezoelectric device with a simple-structure. To meet requirements of higher power applications, the feasibility to transfer kilowatts level power was investigated. Pre-stressed longitudinal piezoelectric feed-thru devices were analyzed by finite element modeling. An equivalent circuit model was developed to predict the characteristics of power transfer to different electric loads. Based on the analytical results, a prototype device was designed, fabricated and successfully demonstrated to transfer electric power at a level of 1-kW. Methods of minimizing plate wave excitation on the wall were also analyzed. Both model analysis and experimental results are presented in detail in this paper.

Paper Details

Date Published: 19 March 2008
PDF: 8 pages
Proc. SPIE 6930, Industrial and Commercial Applications of Smart Structures Technologies 2008, 69300Z (19 March 2008);
Show Author Affiliations
Xiaoqi Bao, Jet Propulsion Lab. (United States)
Will Biederman, Jet Propulsion Lab. (United States)
Stewart Sherrit, Jet Propulsion Lab. (United States)
Mircea Badescu, Jet Propulsion Lab. (United States)
Yoseph Bar-Cohen, Jet Propulsion Lab. (United States)
Christopher Jones, Jet Propulsion Lab. (United States)
Jack Aldrich, Jet Propulsion Lab. (United States)
Zensheu Chang, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 6930:
Industrial and Commercial Applications of Smart Structures Technologies 2008
L. Porter Davis; Benjamin Kyle Henderson; M. Brett McMickell, Editor(s)

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