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Modeling and performance analysis of a novel M-shaped piezoelectric energy harvester employing magnets

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Abstract

Piezoelectric energy harvesters convert the vibration energy of a mechanical system into the electrical energy. Among them, cantilever type is the most popular one. With the cantilever type harvester, however, generated voltage decreases rapidly when excitation frequency deviates from the natural frequency of the harvester. To overcome the weakness and achieve good voltage generation performance, we proposed a new M-shaped energy harvester using two sets of magnets. We derived the coupled electromechanical equations and investigated the performance of generated voltage and power using the equation model. By controlling the distance between two magnets in a set, we could design an energy harvester having either a large single peak or broadband voltage frequency response characteristic. We could also achieve a better power generation performance with the novel M-shaped piezoelectric harvester.

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Acknowledgments

This research was supported by the Basic Science Research Program through a grant from the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT (NRF-2018R1A2A2A05022590).

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Authors and Affiliations

  1. Department of Mechanical Convergence Engineering, Hanyang University, Seoul, 04763, Korea

    Sun Keol Lim

  2. School of Mechanical Engineering, Hanyang University, Seoul, 04763, Korea

    Hong Hee Yoo

Authors
  1. Sun Keol Lim
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  2. Hong Hee Yoo
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Correspondence to Hong Hee Yoo.

Additional information

Sun Keol Lim received his B.S. degree in the Department of Mechanical Engineering in Donga University in 2017. He is working as a M.S. candidate in the Department of Mechanical Convergence Engineering in Hanyang University, Seoul, Korea. His research interests include structural vibration and dynamics.

Hong Hee Yoo received his B.S. and M.S. degrees in the Department of Mechanical Design in Seoul National University in 1980 and 1982. He received his Ph.D. degree in the Department of Mechanical Engineering and Applied Mechanics in the University of Michigan at Ann Arbor in 1989. He is a Professor in the Department of Mechanical Engineering at Hanyang University, Seoul, Korea. His research interests include multi-body dynamics, structural vibration and statistical uncertainty analysis in mechanics.

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Lim, S.K., Yoo, H.H. Modeling and performance analysis of a novel M-shaped piezoelectric energy harvester employing magnets. J Mech Sci Technol 34, 3553–3563 (2020). https://doi.org/10.1007/s12206-020-0807-y

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  • DOI: https://doi.org/10.1007/s12206-020-0807-y

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