Magnetoelectric Energy Harvesting from Vibrations of Multiple Frequencies

被引：18
|
作者：
Yang, Jin [1 ]
Wen, Yumei [1 ]
Li, Ping [1 ]
机构：
[1] Chongqing Univ, Key Lab Optoelect Technol & Syst, Minist Educ, Coll Optoelect Engn, Chongqing 400044, Peoples R China
来源：
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES | 2011年 / 22卷 / 14期
基金：
中国国家自然科学基金;
关键词：
multi-frequency vibration energy harvesting; multi-cantilever beams; magnetoelectric transducer; magnetic force; POWER GENERATOR;
D O I：
10.1177/1045389X11406300
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel multi-frequency vibration energy harvester has been designed and fabricated, which consists of two cantilever beams, two magnetoelectric (ME) transducers and a magnetic circuit. In the harvester, the magnetic forces between the ME transducers and the magnetic circuit will result in additional magnetic stiffness on the two cantilever beams, on which the frequency response of the harvester is highly dependent. In addition, the magnet circuit should provide the best magnetic field conditions for the ME transducers to obtain large ME conversion outputs. Therefore, in this article, a theoretical model is developed to analyze the effects of the structure parameters on the frequency response and the electrical-output for achieving the optimal vibration energy-harvesting performances. A prototype was fabricated and tested. The experimental results showed that, the harvester had a bandwidth of 5.6 Hz and a maximum average power value of 0.25 mW at an acceleration of 0.2 g (with g = 9.8 m/s(2)).
引用
收藏
页码：1631 / 1639
页数：9
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