Experimental investigation of non-linear multi-stable electromagnetic-induction energy harvesting mechanism by magnetic levitation oscillation

•A multi-stable electromagnetic-induction energy harvesting system is proposed.•Detailed device construction and experimental techniques are revealed.•Bifurcation, high-energy orbits, and chaotic motions are experimentally investigated.•Algorithm for stroboscopic illustration of bifurcation diagram...

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Bibliographic Details
Published in:Applied energy 2018-06, Vol.220, p.856-875
Main Authors: Gao, Mingyuan, Wang, Yuan, Wang, Yifeng, Wang, Ping
Format: Article
Language:English
Subjects:
Bifurcation
Largest Lyapunov exponent
Magnetic levitation
Multi-stable energy harvesting (MEH)
Non-linear mechanism
Potential well
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Summary:•A multi-stable electromagnetic-induction energy harvesting system is proposed.•Detailed device construction and experimental techniques are revealed.•Bifurcation, high-energy orbits, and chaotic motions are experimentally investigated.•Algorithm for stroboscopic illustration of bifurcation diagram is elaborated.•The device delivers a root-mean-square current of 80.15 mA and power of 400.98 mW. The objective of this study is to present a multi-stable electromagnetic-induction energy harvesting (MEH) system by magnetic levitation oscillation. The MEH system has a non-linear restoring force and a multi-well restoring force potential, offering an improvement upon their linear counterparts by broadening its frequency response. This paper presents the mechanics of the electromagnetic-induction MEH system and describes the multi-stable mechanism by magnetic levitation oscillation. Experimental investigations reveal phenomena of dynamical bifurcation, escape from potential wells, high energy orbits, and chaotic oscillation. Two quad-stable and one tri-stable configurations are experimentally achieved and analyzed by means of phase portraits, Poincaré section, largest Lyapunov exponent, and bifurcation diagram. Algorithm of stroboscopic illustration of bifurcation diagram is elaborated. The results indicate that the electromagnetic-induction MEH system by magnetic levitation oscillation can be utilized to create a multi-well restoring force potential and increase the output current (i.e. electrical load capacity) of energy harvesters.
ISSN:0306-2619
1872-9118
DOI:10.1016/j.apenergy.2018.03.170