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A chaotic vibration energy harvester using magnetic material

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Title: A chaotic vibration energy harvester using magnetic material
Authors: Sato, Takahiro Browse this author
Igarashi, Hajime Browse this author →KAKEN DB
Keywords: energy harvesting
electromagnetic harvester
wideband harvester
chaotic oscillation
Issue Date: 23-Jan-2015
Publisher: IOP Publishing
Journal Title: Smart materials and structures
Volume: 24
Issue: 2
Start Page: 25033
Publisher DOI: 10.1088/0964-1726/24/2/025033
Abstract: This paper presents a new wideband electromagnetic vibration energy harvester (VEH) composed of a magnetic core embedded into the coil axis. The magnetic core generates a nonlinear magnetic force, which gives rise to the nonlinearity in the behavior of the VEH. Moreover, the magnetic core increases the flux linkage with the coil. These features improve the operational bandwidth and output power of the VEH. Numerical analysis and experimental measurements reveal that the operational bandwidth of the proposed VEH is over 30 Hz in which the output power is kept about 0.1 mW. Moreover, the proposed VEH operates by complicated oscillation due to nonlinear forces acting on the oscillator. Evaluation of the Lyapunov exponent for the measured oscillation suggests that the proposed VEH produces chaotic oscillation.
Rights: This is an author-created, un-copyedited version of an article accepted for publication in Smart materials and structures. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at
Type: article (author version)
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 五十嵐 一

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