Magnetic levitation-based electromagnetic energy harvesting: a semi-analytical non-linear model for energy transduction.
Marco P. Soares dos Santos,Jorge Ferreira,José A. O. Simões,R. Pascoal,João Manuel Nunes Torrão,Xiaozheng Xue,Edward P. Furlani +6 more
TLDR
A combined theoretical and experimental study is presented of a harvester configuration that utilizes the motion of a levitated hard-magnetic element to generate electrical power and a semi-analytical, non-linear model is introduced that enables accurate and efficient analysis of energy transduction.Abstract:
Magnetic levitation has been used to implement low-cost and maintenance-free electromagnetic energy harvesting. The ability of levitation-based harvesting systems to operate autonomously for long periods of time makes them well-suited for self-powering a broad range of technologies. In this paper, a combined theoretical and experimental study is presented of a harvester configuration that utilizes the motion of a levitated hard-magnetic element to generate electrical power. A semi-analytical, non-linear model is introduced that enables accurate and efficient analysis of energy transduction. The model predicts the transient and steady-state response of the harvester a function of its motion (amplitude and frequency) and load impedance. Very good agreement is obtained between simulation and experiment with energy errors lower than 14.15% (mean absolute percentage error of 6.02%) and cross-correlations higher than 86%. The model provides unique insight into fundamental mechanisms of energy transduction and enables the geometric optimization of harvesters prior to fabrication and the rational design of intelligent energy harvesters.read more
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