Evaluation of the Output Load Effect on a Piezoelectric Energy Harvester

Coelho, M. A. J.; Flores, Jeferson Vieira; Brusamarello, Valner

doi:10.1007/s40313-018-0383-x

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…There is much research concerning designing and optimizing the piezoelectric energy harvester’s load. Such an issue is very important in adjusting, controlling and optimizing the structure’s performance [ 40 , 41 , 42 , 43 ]. Regarding our proposed structure, in this phase, our main concern was to evaluate and verify our proposed structure and its performance in achieving the bandwidth broadening.…”

Section: Proposed Single-beam Piezoelectric Cantilevermentioning

confidence: 99%

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

et al. 2021

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One of the most important challenges in the design of the piezoelectric energy harvester is its narrow bandwidth. Most of the input vibration sources are exposed to frequency variation during their operation. The piezoelectric energy harvester’s narrow bandwidth makes it difficult for the harvester to track the variations of the input vibration source frequency. Thus, the harvester’s output power and overall performance is expected to decline from the designed value. This current study aims to solve the problem of the piezoelectric energy harvester’s narrow bandwidth. The main objective is to achieve bandwidth broadening which is carried out by segmenting the piezoelectric material of the energy harvester into n segments; where n could be more than one. Three arrays with two, four, and six beams are shaped with two piezoelectric segments. The effect of changing the length of the piezoelectric material segment on the resonant frequency, output power, and bandwidth, as well as the frequency response is investigated. The proposed piezoelectric energy harvesters were implemented utilizing a finite element method (FEM) simulation in a MATLAB environment. The results show that increasing the number of array beams increases the output power and bandwidth. For the three-beam arrays, at n equals 2, 6 mW output power and a 9 Hz bandwidth were obtained. Moreover, the bandwidth of such arrays covered around 5% deviation from its resonant frequency. All structures were designed to operate as a steel wheel safety sensor which could be used in train tracks.

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Section: Proposed Single-beam Piezoelectric Cantilevermentioning

confidence: 99%

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

et al. 2021

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“…Equation (41) shows that the maximum conversion efficiency which occurs when the external resistance matches the impedance of the piezoelectric oscillator circuit. e conversion efficiency of the piezoelectric oscillator under the action of impedance matching external circuit resistance is as follows: 6 Mathematical Problems in Engineering…”

Section: Analytical Solution Of Simple Harmonic Vibration Of Near Natmentioning

confidence: 99%

“…Liu et al [5] studied development of the environmental-friendly BZT-BCT/ P(VDF-TrFE) composite film for the piezoelectric generator. Coelho et al [6] evaluated the output load effect on a piezoelectric energy harvester and presented the study of a vibration energy harvesting system using the piezoelectric generator coupled to a cantilever beam when subjected to output loads with different electrical characteristics. e conversion efficiency of the float is closely related to its structure and degree of freedom of oscillation.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical Model of Coupling Spring Piezoelectric Oscillator with Loading

Chen

Song

2020

Mathematical Problems in Engineering

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The paper studies the influence of piezoelectric materials and structural parameters on the electromechanical conversion characteristics of the piezoelectric vibrator. Employing the mechanical theory of Euler–Bernoulli beam, the mechanical vibration and circuit balance equation are obtained about the single-step variable cross-section bimorph piezoelectric vibrator under the condition of external resistance, and the analytical equations are derived for the displacement, output voltage, and conversion efficiency of the piezoelectric vibrator excited by near natural frequency simple harmonic support. The validity of the theoretical model is verified by vibration test. Theoretical analysis and experimental results show that the mechanical and electrical conversion efficiency of the piezoelectric vibrator is the highest when the circuit impedance is matched, and the mechanical and electrical conversion efficiency of the piezoelectric vibrator is determined by the resistance ratio caused by mechanical and electrical coupling after resistance optimization.

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Comparative Analysis of Active Impedance Matching Interfaces for Piezoelectric Energy Harvesters

Vanderwegen,

Porto,

Murliky

et al. 2024

J Control Autom Electr Syst

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Evaluation of the Output Load Effect on a Piezoelectric Energy Harvester

Cited by 4 publications

References 23 publications

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

Electromechanical Model of Coupling Spring Piezoelectric Oscillator with Loading

Comparative Analysis of Active Impedance Matching Interfaces for Piezoelectric Energy Harvesters

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