Wideband Piezomagnetoelastic Vibration Energy Harvesting

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    Abstract

    This work presents a small-scale wideband piezomagnetoelastic vibration energy harvester (VEH) aimed for operation at frequencies of a few hundred Hz. The VEH consists of a tape-casted PZT cantilever with thin sheets of iron foil attached on each side of the free tip. The wideband operation is achieved by placing the cantilever in a magnetic field induced by either one or two magnets located oppositely of the cantilever. The attraction force created by the magnetic field and iron foils introduces a mechanical force in opposite direction of the cantilevers restoring force causing a spring softening effect. In linear operation (without magnets) the harvester generates a RMS power of 141 μW/g2 at 588 Hz with a relative bandwidth of 3.8% over a 100 kΩ load resistor. When operated with one magnet ideally positioned opposite the cantilever, a RMS power of 265 μW/g2 is generated at 270 Hz with a relative bandwidth of 25%.
    Original languageEnglish
    Book seriesJournal of Physics: Conference Series (Online)
    Volume557
    Issue number1
    Pages (from-to)012121
    Number of pages5
    ISSN1742-6596
    DOIs
    Publication statusPublished - 2014
    Event14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications - Awaji Yumebutai International Conference Center, Awaji Island, Hyogo, Japan
    Duration: 18 Nov 201421 Nov 2014
    Conference number: 14

    Conference

    Conference14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications
    Number14
    LocationAwaji Yumebutai International Conference Center
    Country/TerritoryJapan
    CityAwaji Island, Hyogo
    Period18/11/201421/11/2014

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