High-power piezoelectric acoustic-electric power feedthru for metal walls

Xiaoqi Bao; Will Biederman; Stewart Sherrit; Mircea Badescu; Yoseph Bar-Cohen; Christopher Jones; Jack Aldrich; Zensheu Chang

doi:10.1117/12.776473

19 March 2008 High-power piezoelectric acoustic-electric power feedthru for metal walls

Xiaoqi Bao, Will Biederman, Stewart Sherrit, Mircea Badescu, Yoseph Bar-Cohen, Christopher Jones, Jack Aldrich, Zensheu Chang

Author Affiliations +

Proceedings Volume 6930, Industrial and Commercial Applications of Smart Structures Technologies 2008; 69300Z (2008) https://doi.org/10.1117/12.776473
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

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.

Citation Download Citation

Xiaoqi Bao, Will Biederman, Stewart Sherrit, Mircea Badescu, Yoseph Bar-Cohen, Christopher Jones, Jack Aldrich, and Zensheu Chang "High-power piezoelectric acoustic-electric power feedthru for metal walls", Proc. SPIE 6930, Industrial and Commercial Applications of Smart Structures Technologies 2008, 69300Z (19 March 2008); https://doi.org/10.1117/12.776473

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