Magnetically-coupled tunable piezoelectric vibration energy harvester

WANG Shuyun; DU Jieya; HUANG Zheren; KAN Junwu; CHAI Chaohui; ZHANG Zhonghua

doi:10.37188/OPE.20243201.0073

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Magnetically-coupled tunable piezoelectric vibration energy harvester

Micro/Nano Technology and Fine Mechanics | 更新时间：2024-01-13

- Magnetically-coupled tunable piezoelectric vibration energy harvester
- Optics and Precision Engineering Vol. 32, Issue 1, Pages: 73-83(2024)
- 作者机构：
  
  浙江师范大学精密机械与智能结构研究所，浙江金华 321004
- 作者简介：
- 基金信息：
- DOI：10.37188/OPE.20243201.0073
  CLC： TN384;TM619
- Published：10 January 2024，
  
  Received：20 July 2023，
  
  Revised：10 August 2023，
- 稿件说明：
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王淑云,杜洁雅,黄喆人等.磁耦合式可调频压电振动俘能器[J].光学精密工程,2024,32(01):73-83.

WANG Shuyun,DU Jieya,HUANG Zheren,et al.Magnetically-coupled tunable piezoelectric vibration energy harvester[J].Optics and Precision Engineering,2024,32(01):73-83.
王淑云,杜洁雅,黄喆人等.磁耦合式可调频压电振动俘能器[J].光学精密工程,2024,32(01):73-83. DOI： 10.37188/OPE.20243201.0073.

WANG Shuyun,DU Jieya,HUANG Zheren,et al.Magnetically-coupled tunable piezoelectric vibration energy harvester[J].Optics and Precision Engineering,2024,32(01):73-83. DOI： 10.37188/OPE.20243201.0073.

摘要

为提高压电振动俘能器的环境适应性，提出一种磁耦合式可调频压电振动俘能器，利用激励器上主动磁铁和组合换能器上被动磁铁间的耦合作用及横摆簧片实现压电振子的单向限幅激励。通过对俘能器及磁对的建模和仿真分析，获得了俘能器结构参数对俘能器输出性能的影响，在此基础上制作俘能器样机并进行实验研究，获得了俘能器纵摆质量

、横摆质量

、横向距离

、纵向距离

、竖向距离

及负载电阻对俘能器输出性能的影响规律。结果表明：存在两阶谐振频率

和

使输出电压出现峰值

和

，调节

，

及

会影响

，

及

；其他条件一定时，存在最佳负载电阻2 200 kΩ使输出功率达到0.122 mW。通过选择合适的结构参数能够提升俘能器的有效频带和输出电压，对增强压电振动俘能器的可靠性和频率适应性具有一定的参考价值。

Abstract

To improve the environmental adaptability of a piezoelectric vibration energy harvester， a magnetically-coupled tunable piezoelectric vibration energy harvester （PVEH） is proposed. The coupling action between the active magnet on the actuator and the passive magnet on the combined transducer and transversal spring was used to realize the unidirectional limiting excitation of the piezoelectric vibrator. Through modeling and simulation analyses of the energy harvester and magnetic pair， influences of the structural parameters of the energy harvester on the corresponding output performance could be determined. On this basis， the energy harvester prototype was developed by selecting a better magnet diameter via experimental research. The influence laws of the energy harvester's longitudinal mass

， transversal mass

， transversal magnet spacing

， longitudinal magnet spacing

， vertical magnet spacing

， and load resistance on the output performance were also obtained. The results show that two order resonant frequencies

and

cause the output voltage to peak to

and

， respectively. Moreover， adjusting

，

， and

will affect

，

， and

. Therefore， the effective frequency band and output voltage of the energy harvester can be increased when appropriate structural parameters are selected for the energy harvester. When other conditions are given， there is an optimal load resistance of 2 200 kΩ that increases the output power to 0.122 mW. Therefore， the effective frequency band and output voltage of the energy harvester can be improved by selecting suitable structural parameters and distance between magnets. The results provide good reference value for enhancing the reliability and frequency adaptability of the PVEH.

关键词

压电可调频磁耦合组合换能器能量回收

Keywords

piezoelectricadjustable frequencymagnetic couplingcombination transducerenergy recovery

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