Novel Design, Analytical and Experimental Studies of Spring Comprised Piezo Electric Energy Harvester

This study provides a double elastic steel sheet (DESS) piezoelectric energy harvester system, in which the vibration generated by the deformation and clap of two elastic steel sheets is assisted by a piezo patch to generate electric energy. The system is combined with energy storage equipment to propose a complete solution forgreen energy integration. This study buildsexperimentallyon the model of the proposed system to explore its voltage, power output and energy collection efficiency. This study also builds atheoretical model of a nonlinear beam with the piezo patch, including the piezoelectric coupling coefficient and current equation. This nonlinear problem is analyzed by the method of multiple scales (MOMS). The system frequency response wasobserved using fixed points plots. The perturbation technique and numerical method wereused to mutually validate the experimental results; the concept of DESS vibration energy harvester (DESS VEH) is proved feasible. In order to prolong the lifetime of the clapping of DESS piezo patch, a camber protector design is proposed. The findings show that the power-generating effect is best when the piezo patch is placed at the peak of the third mode of the DESS system, and the high camber protector is used to generate electric energy.

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Piezo Electric energy harvester and its interface circuit: Opportunities and challenges

2013 IEEE 20th International Conference on Electronics, Circuits, and Systems (ICECS) ◽

10.1109/icecs.2013.6815534 ◽

2013 ◽

Cited By ~ 3

Author(s):

Maisam Wahbah ◽

Baker Mohammad

Keyword(s):

Energy Harvester ◽

Electric Energy ◽

Interface Circuit ◽

Piezo Electric

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Multi-Stable Magnetic Spring-Based Energy Harvester Subject to Harmonic Excitation: Comparative Study and Experimental Evaluation

Volume 4B: Dynamics, Vibration, and Control ◽

10.1115/imece2018-86157 ◽

2018 ◽

Author(s):

Hieu Nguyen ◽

Hamzeh Bardaweel

Keyword(s):

Energy Harvesting ◽

Kinetic Energy ◽

Comparative Study ◽

Experimental Evaluation ◽

Chaotic Motion ◽

Energy Harvester ◽

Electric Energy ◽

Harmonic Excitation ◽

Jump Frequency ◽

Piezoelectric Elements

The work presented here investigates a unique design platform for multi-stable energy harvesting using only interaction between magnets. A solid cylindrical magnet is levitated between two stationary magnets. Peripheral magnets are positioned around the casing of the energy harvester to create multiple stable positions. Upon external vibration, kinetic energy is converted into electric energy that is extracted using a coil wrapped around the casing of the harvester. A prototype of the multi-stable energy harvester is fabricated. Monostable and bistable configurations are demonstrated and fully characterized in static and dynamic modes. Compared to traditional multi-stable designs the harvester introduced in this work is compact, occupies less volume, and does not require complex circuitry normally needed for multi-stable harvesters involving piezoelectric elements. At 2.5g [m/s2], results from experiment show that the bistable harvester does not outperform the monostable harvester. At this level of acceleration, the bistable harvester exhibits intrawell motion away from jump frequency. Chaotic motion is observed in the bistable harvester when excited close to jump frequency. Interwell motion that yields high displacement amplitudes and velocities is absent at this acceleration.

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Analysis of a Cantilevered Piezoelectric Energy Harvester in Different Orientations for Rotational Motion

Sensors ◽

10.3390/s20041206 ◽

2020 ◽

Vol 20 (4) ◽

pp. 1206 ◽

Cited By ~ 2

Author(s):

Wei-Jiun Su ◽

Jia-Han Lin ◽

Wei-Chang Li

Keyword(s):

Theoretical Model ◽

Resonant Frequency ◽

Rotational Motion ◽

Axial Load ◽

Energy Harvester ◽

Excitation Frequency ◽

Experimental Studies ◽

Piezoelectric Energy ◽

Piezoelectric Cantilever ◽

Tip Mass

This paper investigates a piezoelectric energy harvester that consists of a piezoelectric cantilever and a tip mass for horizontal rotational motion. Rotational motion results in centrifugal force, which causes the axial load on the beam and alters the resonant frequency of the system. The piezoelectric energy harvester is installed on a rotational hub in three orientations—inward, outward, and tilted configurations—to examine their influence on the performance of the harvester. The theoretical model of the piezoelectric energy harvester is developed to explain the dynamics of the system and experiments are conducted to validate the model. Theoretical and experimental studies are presented with various tilt angles and distances between the harvester and the rotating center. The results show that the installation distance and the tilt angle can be used to adjust the resonant frequency of the system to match the excitation frequency.

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