期刊
IEEE ACCESS
卷 5, 期 -, 页码 27563-27572出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2017.2775652
关键词
Energy harvesting; piezoelectric vibration energy harvester; composite cantilever beam; magnetic levitation; initial free-end levitation position; resonance frequency
资金
- National Natural Science Foundation of China [51577173, 61574128, 51377147]
- Zhejiang Provincial Natural Science Foundation of China [LY16F010003, LY17F010004, LY15E050009]
Vibration energy harvesting by using piezoelectric materials provides a promising alternative solution for a wide range of self-powered systems. In this paper, performance dependence on initial free-end levitation position (IFLP) of a magnetically levitated piezoelectric vibration energy harvester (PVEH) with a composite cantilever beam is presented. A prototype consisting of a high-stiffness lead zirconate titanate beam with a proof mass and a fiexible brass beam with a tip mass as well as an auxiliary structure adjusting repulsive magnetic force was fabricated to evaluate the IFLP effects. Experimental results showed that the performance of the magnetically levitated PVEH was varied with different IFLPs. With declining of the IFLP, the peak power output at the first resonance frequency decreased monotonically from 1541 to 343.2 mu W, meanwhile, the power output initially decreased from 2735.6 to 904.5 mu W and then constantly increased from 904.5 to 2220.9 mu W at the second resonance frequency. The frequency variation at the first and second resonance points was 1.5 and 4 Hz, respectively. It was found that the IFLP had a stronger impact on the performance when itwas above the horizontal orientation than belowthe horizontal orientation. Moreover, the IFLP brought a more significant influence on the second resonance frequency than the first one. In addition, the IFLP had a larger effect on the power output than the resonance frequency.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据