Performance Dependence on Initial Free-End Levitation of a Magnetically Levitated Piezoelectric Vibration Energy Harvester With a Composite Cantilever Beam | Zendy

Zhonghua Zhang | Zendy; Junwu Kan | Zendy; Shuyun Wang | Zendy; Hongyun Wang | Zendy; Can Yang | Zendy; Song Chen | Zendy

Open Access

Performance Dependence on Initial Free-End Levitation of a Magnetically Levitated Piezoelectric Vibration Energy Harvester With a Composite Cantilever Beam

Author(s) -

Zhonghua Zhang,

Junwu Kan,

Shuyun Wang,

Hongyun Wang,

Can Yang,

Song Chen

Publication year - 2017

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2017.2775652

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

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 freeend 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 flexible 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 μW, meanwhile, the power output initially decreased from 2735.6 to 904.5 μW and then constantly increased from 904.5 to 2220.9 μW 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 it was above the horizontal orientation than below the 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.

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