Study of piezoelectric wind energy harvester with indirect excitation

Shu-yun WANG; Meng-jia YAN; Jun-wu KAN; Zhong-hua ZHANG; Song CHEN; Peng LÜ

doi:10.3788/OPE.20192705.1121

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Study of piezoelectric wind energy harvester with indirect excitation

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-08-13

- Study of piezoelectric wind energy harvester with indirect excitation
- Optics and Precision Engineering Vol. 27, Issue 5, Pages: 1121-1127(2019)
- 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：10.3788/OPE.20192705.1121
  CLC： TN384; TK83
- Received：15 October 2018，
  
  Accepted：17 December 2018，
  
  Published：15 May 2019
- 稿件说明：
移动端阅览
Shu-yun WANG, Meng-jia YAN, Jun-wu KAN, et al. Study of piezoelectric wind energy harvester with indirect excitation[J]. Optics and precision engineering, 2019, 27(5): 1121-1127.
DOI：

Shu-yun WANG, Meng-jia YAN, Jun-wu KAN, et al. Study of piezoelectric wind energy harvester with indirect excitation[J]. Optics and precision engineering, 2019, 27(5): 1121-1127. DOI： 10.3788/OPE.20192705.1121.

摘要

为提高环境监测自供电系统的可靠性及风速适应性，提出一种间接激励式压电风力俘能器，通过圆柱型壳体与风场耦合作用产生的涡激振动间接激励壳体内的压电梁振动发电，具有可靠性高、动态特性调节范围宽等优点。介绍了其结构及原理，并进行了理论和试验研究。结果表明：壳体质量、压电梁质量对风力俘能器输出性能都有较大影响；当俘能器总质量确定时，试验范围内通过增加压电梁质量，减小壳体质量可以有效提高压电俘能器的输出性能；此外，不同风速下存在最佳负载使输出功率最大，且本文试验范围内输出功率及最佳负载均随风速增加而增大，风速为28 m/s、电阻600 kΩ时所获得的最大输出功率为0.4 mW。因此，应根据实际风速范围确定合理的压电梁质量/壳体质量以提高俘能器输出能力。

Abstract

To improve the reliability and bandwidth of self-powered systems for environmental monitoring

a piezoelectric wind energy harvester with indirect excitation was presented. The piezoelectric beam in the shell was excited by the turbo-excited vibration generated by the coupling of the cylinder shell and wind. The proposed harvester had the advantages of high reliability and a wide dynamic adjustment range. This study introduced its structure and the principles of its operation while conducting theoretical and experimental research. The results show that the shell mass and piezoelectric beam quality have considerable influence on the output voltage of the energy harvester. Specifically

the output voltage increased with an increase in piezoelectric beam quality and decrease in shell mass. In addition

an optimal load was determined to maximize the output power under different wind speeds. The output power and optimal load were found to increase with increasing wind speed. When the wind speed is 28 m/s and the external resistance is 600 kΩ

the maximum output power is 0.4 mW under test conditions. Therefore

a reasonable shell mass and piezoelectric beam quality should be determined based on the actual range of wind speed to improve the capacity of the capture device.

关键词

Keywords

references

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