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1KW power transmission using Wireless Acoustic-Electric Feed-through (WAEF)

Show simple item record Sherrit, S. Bao, X. Badescu, M. Aldrich, J. Bar-Cohen, Y. Biederman, W.
dc.contributor.editor Chang, Z. en_US 2011-06-20T22:08:50Z 2011-06-20T22:08:50Z 2008-03-03
dc.identifier.citation ASCE American Society of Civil Engineers, Earth and Space 2008, Long Beach, California, March 03, 2008. en_US
dc.identifier.clearanceno 08-0227
dc.description.abstract A variety of space applications require the delivery of power into sealed structures. Since the structural integrity can be degraded by holes for cabling we present an alternative method of delivering power and information using stress waves to the internal space of a sealed structure. One particular application of this technology is in sample return missions where it is critical to preserve the sample integrity and to prevent earth contamination. Therefore, the container has to be hermetically sealed and the integrity of the seal must be monitored in order to insure to a high degree of reliability the integrity of the sample return vessel. In this study we investigated the use of piezoelectric acoustic-electric power feed-through devices to transfer electric power wirelessly through a solid wall by using elastic or acoustic waves. The technology is applicable to a range of space and terrestrial applications where power is required by electronic equipment inside sealed containers, vacuum or pressure vessels, etc., where holes in the wall are prohibitive or may result in significant structural performance degradation or unnecessarily complex designs. To meet requirements of higher power applications, the feasibility to transfer kilowatts level power was investigated. Pre-stressed longitudinal piezoelectric feed-through devices were analyzed by finite element models and an equivalent circuit model was developed to predict the power transfer characteristics to different electric loads. Based on the results of the analysis a prototype device was designed, fabricated and a demonstration of the transmission of electric power up to 1.068-kW was successfully conducted. Efficiencies in the 80-90% range were also demonstrated and methods to increase the efficiency further are currently being considered. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2008. en_US
dc.subject piezoelectric devices en_US
dc.subject acoustic waves en_US
dc.subject electric power supplies en_US
dc.subject wireless power feeds en_US
dc.subject pressure vessels en_US
dc.title 1KW power transmission using Wireless Acoustic-Electric Feed-through (WAEF) en_US
dc.type Preprint en_US

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