Dynamics of a bistable coupled dual-beam energy harvester and its experimental validation

2018 ◽  
Author(s):  
Chunbo Lan ◽  
Lihua Tang ◽  
Guobiao Hu ◽  
Weiyang Qin
Keyword(s):  
Beam Energy ◽  
Experimental Validation ◽  
Energy Harvester ◽  
Dual Beam

Experimental and Theoretical Study of a Dual-Beam Piezoelectric Energy Harvester With Misaligned Magnets

2018 ◽  
Author(s):  
Wei-Jiun Su ◽  
Hsuan-Chen Lu
Keyword(s):  
Energy Harvester ◽  
Theoretical Study ◽  
Beam Theory ◽  
Main Beam ◽  
Bernoulli Beam ◽  
Potential Wells ◽  
Piezoelectric Energy ◽  
Dual Beam ◽  
Frequency Sweeps ◽  
Euler Bernoulli Beam

In this study, a dual-beam piezoelectric energy harvester is proposed. This harvester consists of a main beam and an auxiliary beam with a pair of magnets attached to couple their motions. The potential energy of the system is modeled to understand the influence of the potential wells on the dynamics of the harvester. It is noted that the alignment of the magnets significantly influences the potential wells. A theoretical model of the harvester is developed based on the Euler-Bernoulli beam theory. Frequency sweeps are conducted experimentally and numerically to study the dynamics of the harvester. It is shown that the dual-beam harvester can exhibit hardening effect with different configurations of magnet alignments in frequency sweeps. The performance of the harvester can be improved with proper placement of the magnets.

A Belleville-Spring Based Piezoelectric or Electromagnetic Energy Harvester

2014 ◽  
Author(s):  
Davide Castagnetti
Keyword(s):  
Energy Harvesting ◽  
Power Output ◽  
Experimental Validation ◽  
Energy Harvester ◽  
Elastic System ◽  
Low Frequency ◽  
Electromagnetic Energy ◽  
Frequency Range ◽  
Modal Response ◽  
Force Displacement

Energy harvesting from kinetic ambient energy requires converters able to efficiently operate in the low frequency range. A limit of the solutions proposed in the literature, both electromagnetic and piezoelectric, is their operating frequency, which generally ranges from about 50 to 300 Hz. To overcome these limitations, this work proposes an innovative energy harvester exploiting two counteracting Belleville springs. Thanks to the peculiar height to thickness ratio of the springs a highly compliant elastic system is obtained, which can be used either for electromagnetic or piezoelectric harvesting. The harvester is modelled analytically and numerically both with regard to the force-displacement and to the modal response. The experimental validation of the harvester, highlights a noticeable power output but at a higher eigenfrequency than expected.

scholarly journals Experimental Validation of Aluminum Nitride Energy Harvester Model with Power Transfer Circuit

2009 ◽  
Vol 1 (1) ◽  
pp. 1443-1446 ◽  
Author(s):  
S. Matova ◽  
D. Hohlfeld ◽  
R. van Schaijk ◽  
C.J. Welham ◽  
S. Rouvillois
Keyword(s):  
Aluminum Nitride ◽  
Experimental Validation ◽  
Energy Harvester ◽  
Power Transfer

A Piezoelectric Based Energy Harvester With Dynamic Magnification

2015 ◽  
Author(s):  
Davide Castagnetti
Keyword(s):  
Energy Harvesting ◽  
Fractal Geometry ◽  
Efficient Solution ◽  
Experimental Validation ◽  
Computational Analysis ◽  
Energy Harvester ◽  
Piezoelectric Materials ◽  
Piezoelectric Transducers ◽  
Ambient Vibrations ◽  
Piezoelectric Energy

Energy harvesting from ambient vibrations exploiting piezoelectric materials is an efficient solution for the development of self-sustainable electronic nodes. This work presents a simple and innovative piezoelectric energy harvester, intrinsically including dynamic magnification and inspired by fractal geometry. After an initial design step, computational analysis and experimental validation show a very good frequency response with five eigenfrequencies below 100 Hz. Even if the piezoelectric transducers were put only on a symmetric half of the top surface of the structure, the energy conversion is good for all the eigenfrequencies investigated.

Large stroke tri-stable vibration energy harvester: Modelling and experimental validation

2022 ◽  
Vol 168 ◽  
pp. 108699
Author(s):  
Chaoran Liu ◽  
Baopeng Liao ◽  
Rui Zhao ◽  
Kaiping Yu ◽  
Heow Pueh Lee ◽  
...  
Keyword(s):  
Experimental Validation ◽  
Energy Harvester ◽  
Vibration Energy ◽  
Vibration Energy Harvester
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