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Experimental and theoretical analysis of a hybrid vibration energy harvester with integrated piezoelectric and electromagnetic interaction

压电-电磁混合振动俘能器的实验与理论分析

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Abstract

Harvesting vibration energy has attracted the attention of researchers in recent decades as a promising approach for powering wireless sensor networks. The hybridization of piezoelectricity and electromagnetism has proven helpful in the improvement of vibration energy harvesting. In this study, we explore the integration of piezoelectric and electromagnetic parts in one vibration energy harvesting device. Lumped-parameter models of the system are derived considering the different connection topologies of the piezoelectric and electromagnetic parts. Numerical predictions from these models are compared with experimental results to throw light on the nonlinearities in the system. Modifications of the system are also explored to provide insights into opportunities to improve its performance and that of future vibration energy harvesters.

概要

目的

振动俘能器作为一种富有前景的无线传感器网络供电方法, 压电与电磁的耦合有助于提高振动俘能器的输出性能。本文旨在探讨压电和电磁在混合振动俘能器中的集成, 考虑压电和电磁不同的连接拓扑, 并对该混合振动俘能器的优化结构进行探索, 提出改进其性能的方法。

创新点

1. 将压电和电磁两种能量收集装置集成在一个系统中进行分析;2. 分析压电与电磁之间不同的连接拓扑, 建立其集总参数模型;3. 提出该混合振动俘能器的优化结构。

方法

1. 首先对压电-电磁混合振动俘能器的输入和输出信号进行分析, 强调对其包含多频成分的特征理解不够充分, 提出并讨论表征这类信号的方法。2. 通过实验分析压电和电磁混合振动俘能器四种连接拓扑方式的输出性能, 推导出他们的集中参数模型。3. 将这些参数模型的数值预测结果与实验结果进行比较(图4~6), 揭示系统中的非线性。4. 对优化的混合振动俘能器进行了实验分析探索, 提出改进其性能的方法。

结论

1. 针对不同的连接拓扑, 通过实验研究的混合振动俘能器的均方根电压和平均功率与所建立模型的数值预测结果一致。2. 电磁和压电部件之间的电气连接可以调节俘能器的频率特性并改变其输出性能。3. 用弹性弹簧取代原混合振动俘能器的上部固定磁铁, 性能得到了明显的改善, 并观察到了相当大的频率调整;改变弹簧和移动磁铁之间的初始距离d会极大地影响俘能器的输出性能(图10和11)。

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Acknowledgments

This work is supported by the Zhejiang Provincial Natural Science Foundation of China (No. LY22E050013) and the China Postdoctoral Science Foundation (No. 2021M690545), and is also supported in part by the Zhejiang Provincial Natural Science Foundation of China (No. LZY22E050001) and the National Natural Science Foundation of China (No. 51805124).

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Authors

Contributions

Shifan HUANG, Zhenlong XU, and Maoying ZHOU designed the research. Shifan HUANG and Weihao LUO processed the corresponding data. Shifan HUANG wrote the first draft of the manuscript. Weihao LUO, Zongming ZHU, Ban WANG, and Huawei QIN helped to organize the manuscript. Maoying ZHOU and Shifan HUANG revised and edited the final version.

Corresponding author

Correspondence to Maoying Zhou  (周茂瑛).

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Shifan HUANG, Weihao LUO, Zongming ZHU, Zhenlong XU, Ban WANG, Maoying ZHOU, and Huawei QIN declare that they have no conflict of interest.

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Experimental and theoretical analysis of a hybrid vibration energy harvester with integrated piezoelectric and electromagnetic interaction

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Huang, S., Luo, W., Zhu, Z. et al. Experimental and theoretical analysis of a hybrid vibration energy harvester with integrated piezoelectric and electromagnetic interaction. J. Zhejiang Univ. Sci. A 24, 991–1002 (2023). https://doi.org/10.1631/jzus.A2200551

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  • DOI: https://doi.org/10.1631/jzus.A2200551

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