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Nonlinear piezoelectric devices for broadband air-flow energy harvesting

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  • Piezoelectric Energy Harvesting
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Abstract

This paper presents preliminary work on an investigation of a nonlinear air-flow energy harvester integrating magnets and a piezoelectric cantilever array. Two individual piezoelectric cantilevers with the structure of free-standing multi-layer thick-films have been fabricated and assembled with a free-spinning fan. The cantilevers were attached with different tip masses thereby achieving separated resonant frequencies. Also, permanent magnets were fixed onto the blades of the fan as well as the tips of the cantilevers, in order to create nonlinear coupling and transfer fluidic movement into mechanical oscillation. The device has been tested in a wind tunnel. Bifurcations in the spectra of the blade rotation speed of the fan as a function of output voltage have been observed, and a bandwidth (blade rotation speed range) widening effect has been achieved.

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Authors and Affiliations

  1. Central European Institute of Technology (CEITEC), Brno University of Technology, 61600, Brno, Czech Republic

    Y. Bai, Z. Havránek, P. Tofel, H. Hughes & T.W. Button

  2. School of Metallurgy and Materials, University of Birmingham, Birmingham, B15 2TT, UK

    Y. Bai, C. Meggs & T.W. Button

Authors
  1. Y. Bai
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  2. Z. Havránek
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  3. P. Tofel
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  4. C. Meggs
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  5. H. Hughes
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  6. T.W. Button
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Correspondence to Y. Bai.

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Bai, Y., Havránek, Z., Tofel, P. et al. Nonlinear piezoelectric devices for broadband air-flow energy harvesting. Eur. Phys. J. Spec. Top. 224, 2675–2685 (2015). https://doi.org/10.1140/epjst/e2015-02582-8

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  • DOI: https://doi.org/10.1140/epjst/e2015-02582-8

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