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Numerical analysis of a magnetic-spring-based piecewise nonlinear electromagnetic energy harvester

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Abstract

A magnetic-spring-based electromagnetic energy harvester (EMEH) with piecewise nonlinear stiffness is systematically analyzed in this paper. In terms of a traditional magnetic-spring-based EMEH, Ansys Maxwell is utilized to calculate the magnetic flux through the coil and the nonlinear magnetic force exerted on the moving magnet, based on which the influence of the position of the coil relative to the tube on the response characteristics is investigated. For the EMEH with the optimum position of coil, linear spring is introduced to the system to realize piecewise nonlinear stiffness, and the corresponding expression form of force is provided. Numerical simulations are carried out, and the influence of the impact position, excitation level, and linear spring stiffness on the output is investigated. The results demonstrate that the piecewise nonlinear stiffness in the magnetic-spring-based EMEH could enable the system to respond in a wider frequency range, thus generating more electrical energy.

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Data availability statement

Data will be made available on reasonable request.

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Acknowledgements

The study was supported by the Project funded by the China Postdoctoral Science Foundation (2020M682336), Science and Technology Project of Henan Province (212102310248).

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Authors and Affiliations

  1. School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, 450001, Henan, China

    Wei Wang, Hongtao Wei & Zon-Han Wei

Authors
  1. Wei Wang
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  2. Hongtao Wei
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  3. Zon-Han Wei
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Correspondence to Wei Wang or Zon-Han Wei.

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Wang, W., Wei, H. & Wei, ZH. Numerical analysis of a magnetic-spring-based piecewise nonlinear electromagnetic energy harvester. Eur. Phys. J. Plus 137, 56 (2022). https://doi.org/10.1140/epjp/s13360-021-02255-5

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  • DOI: https://doi.org/10.1140/epjp/s13360-021-02255-5

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