Nonlinear dynamic analysis of a reciprocative magnetic coupling on performance of piezoelectric energy harvester interfaced with DC circuit

Ibrahim, Dauda Sh.; Sun, Beibei; Oluseyi, Orelaja Adewale; Zhao, Peng; Sharif, Umer

doi:10.1080/15376494.2021.1956654

Cited by 3 publications

(1 citation statement)

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“…Here, the value of the prestressing force and the parameters of the beam will directly affect the height of the potential barrier [25,26]. With the introduction of an external magnet, the performances of these structures are closely relative to the distance between the external magnet and the beam itself by changing the potential barrier [27][28][29]. In addition, the number of external magnets [30], the number of potential wells, and the height of the potential barriers can be altered as well.…”

Section: Introductionmentioning

confidence: 99%

Energy conversion mechanisms of a seesaw-type energy harvester

Zhong¹,

Wang²,

Li³

et al. 2022

J. Phys. D: Appl. Phys.

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Vibration energy harvesters with bistable characteristics, which can convert mechanical energy to electric energy, typically are cantilever beams with magnetic repulsion. In group to enhance its low-frequency performance, a seesaw-type approach has been proposed, which can make the structure overcome the potential barrier more easily. In this paper, we establish electromechanical coupling equations of the whole system, and prove that internal beam delivers mechanical energy to primary beam based on time-domain analysis. Meanwhile, frequency-domain analysis and solutions are conducted to investigate dynamical and electrical behaviours of the system based on the adjustment of different parameters. We find both mechanical and electrical responses are enhanced gradually with the decrease of relative damping coefficient within the bounds of the discussion. And maximum response amplitude can be increased by a factor of 11.3 just by adjusting the position of the internal beam. Furthermore, the length of internal beam can affect responses of the system visibly and regularly, and maximum response amplitude remains unchanged when changing the length of internal beam from 80 mm to 100 mm. All of these suggest that the mechanisms of seesaw-type energy harvester will provide guidance to design more appropriate structure depending on different applications.

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