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An Energy Harvester With Bistable Compliance Characteristics

[+] Author Affiliations
Andrea Cammarano, Stephen G. Burrow, David A. W. Barton

University of Bristol, Bristol, UK

Paper No. DETC2010-29222, pp. 725-732; 8 pages
  • ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 12th International Conference on Advanced Vehicle and Tire Technologies; 4th International Conference on Micro- and Nanosystems
  • Montreal, Quebec, Canada, August 15–18, 2010
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4412-0 | eISBN: 978-0-7918-3881-5
  • Copyright © 2010 by ASME


In this paper we present a bistable energy harvesting device. The bi-stability is produced by the particular arrangement of the permanent magnets which form the electro-magnetic transduction mechanism, in conjunction with an iron-cored stator. The harvester features a high magnetic loading but the resulting bistable compliance introduces complex dynamic behaviors. An experimental approach is first used to characterize the device, from which a simplified mathematical model has been developed. The model is then validated by comparison with experimental data. It has been shown that both chaotic and periodic responses are possible. The paper explores the dynamic behavior of the bistable system and attempts to understand the trade-off between the complex mechanical behavior and the benefits of increased magnetic loading.

Copyright © 2010 by ASME



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