Modelling and experimental study of vertical moving magnetic piezoelectric vibration energy harvester

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (8) : 215-221.

RUI Xiaobo1， LI Yibo1， LIU Yue1， ZHENG Xiaolei1， QI Lei1,2， ZENG Zhoumo1

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Abstract

In this paper, a vertical moving magnetic piezoelectric vibration energy harvester was presented.The performance of the single cantilever harvester was improved with the nonlinear force introduced by the vertical magnets.In order to carry out the analysis and parameter optimization of the structure, a lumped-parameter theoretical model was established, and various modes were studied via simulation.This paper focuses on the repulsive low-frequency mode, and future studies were carried out with experiments.An experimental platform was built with aluminum alloy and piezoelectric fiber material MFC, and the energy harvesting performance was verified.The experimental results show that the numerical simulation can effectively predict the performance within the error tolerance range, and the performance can be effectively improved by the structure.Based on simulations and experiments, the magnet spacing and magnetic flux density parameters were studied and optimized.Under the optimal parameters, the bandwidth can be increased by 40.6% and the peak power can be increased by 42.7%.

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vibration energy harvesting / piezoelectric / broadband / magnet

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RUI Xiaobo1， LI Yibo1， LIU Yue1， ZHENG Xiaolei1， QI Lei1,2， ZENG Zhoumo1. Modelling and experimental study of vertical moving magnetic piezoelectric vibration energy harvester[J]. Journal of Vibration and Shock, 2020, 39(8): 215-221

References

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