On developing an optimal design procedure for a bimorph piezoelectric cantilever energy harvester under a predefined volume

Aboulfotoh, Noha; Twiefel, Jens

doi:10.1016/j.ymssp.2017.12.030

Cited by 22 publications

(16 citation statements)

References 20 publications

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“…Therefore, the approach for making the elastic layer flexible is effective for the bimorph-type PVEHs. Moreover, as reported in previous studies [19–21], the output power can be further improved by optimizing the shape and size and the resonance frequency can be further decreased by adjusting the weight of the proof mass.…”

Section: Resultsmentioning

confidence: 76%

“…Hence, the amount of strain in the piezoelectric layers increases under certain deflection, and consequently, the amount of generated power increases as compared to the unimorph type. In addition, several methods have been reported for increasing the output power by optimizing the cantilever shape and thickness of each layer have been reported [19–21]. Hence, the bimorph configuration is effective in improving the amount of output power.…”

Section: Introductionmentioning

confidence: 99%

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Bimorph piezoelectric vibration energy harvester with flexible 3D meshed-core structure for low frequency vibration

Tsukamoto

Umino

Shiomi

et al. 2018

Science and Technology of Advanced Materials

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This paper proposes a bimorph piezoelectric vibration energy harvester (PVEH) with a flexible 3D meshed-core elastic layer for improving the output power while lowering the resonance frequency. Owing to the high void ratio of the 3D meshed-core structure, the bending stiffness of the cantilever can be lowered. Thus, the deflection of the harvester and the strain in the piezoelectric layer increase. According to vibration tests, the resonance frequency is 15.8% lower and the output power is 68% higher than in the conventional solid-core PVEH. Compared to the solid-core PVEH, the proposed meshed-core PVEH (10 mm × 20 mm × 280 μm) has 1.3 times larger tip deflection and the maximum output power is 24.6 μW under resonance condition at 18.7 Hz and 0.2G acceleration. Hence it can be used as a power supply for low-power-consumption sensor nodes in wireless sensor networks.

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Section: Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Bimorph piezoelectric vibration energy harvester with flexible 3D meshed-core structure for low frequency vibration

Tsukamoto

Umino

Shiomi

et al. 2018

Science and Technology of Advanced Materials

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“…At excitation frequency around the first eigenfrequency, the transfer function is obtained as expressed by Equation (3b). The power output of the bimorph piezoelectric energy harvester are obtained by Equation (4), as derived in [10].…”

Section: Piezoelectric Layersmentioning

confidence: 99%

“…There are three significant applied load resistances as investigated in [10]. Each of the three load resistances provides the maximum power capability at a corresponding excitation frequency, as displayed in Table 5.…”

Section: Piezoelectric Layersmentioning

confidence: 99%

“…It was presented that the advantage of using the array over the reference harvester was very limited to a small additional bandwidth to the detriment of a large drop in the power output. In [10], a parametric study on piezoelectric energy harvesters considering a constant volume was introduced. In order to optimize the power output, the geometrical parameters (length, width, thickness, and tip mass) were recommended to be maximized within the available volume.…”

Section: Introductionmentioning

confidence: 99%

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A Study on Important Issues for Estimating the Effectiveness of the Proposed Piezoelectric Energy Harvesters under Volume Constraints

Aboulfotoh

Twiefel

2018

Applied Sciences

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This study presents theoretical investigations on the effectiveness criteria for piezoelectric energy harvesters (PEHs) under volume constraints. Firstly, the importance of the volume consideration is investigated. The powers of different PEHs of variant volumes are investigated under the same resonance frequency. It is found that the power output is strongly dependent on the volume of the transducer. Secondly, the impact of the mechanical damping, the electrical damping, the volume of motion, the normalized power to the volume, and the applied load resistance on the power output are investigated. The investigations are analyzed to find the optimized conditions of the applied load and the excitation frequency in order to optimize the power output under volume constraints. The proposed procedure for estimating the effectiveness is to compare the performance of the proposed PEHs to a rectangular-shaped PEH of the same volume. An optimized structure for a rectangular-shaped PEH to be used as the reference is investigated. The power output under the optimized conditions is derived. In order to estimate the effectiveness of the proposed PEHs, the average power over a band of frequencies from the proposed structure must be compared to the average power over the same band of frequencies from the optimized reference harvester.

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Simulation and Experiment of Trapezoidal Beam‐Based Piezoelectric Energy Harvesters

Wang

et al. 2023

Energy Tech

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Piezoelectric energy harvesters (PEHs) are thought to be one of the best ways to power wireless sensors. However, how to improve the electrical properties of PEHs is still a key matter. Herein, a trapezoidal beam (TB) is adopted to improve the electrical outputs of PEHs, where the elastic substrate and thinned piezoelectric ceramic element are combined to obtain a piezoelectric beam with 100 μm total thickness. The simulation results indicate that the TB‐based piezoelectric energy harvester (TB‐PEH) possesses a better electrical output performance than the traditional rectangular beam‐based piezoelectric energy harvester (RB‐PEH). The presented TB‐PEH can generate a 5.4 V voltage output, and an average power of 0.2 mW with the 55 kΩ optimal resistance. The 100, 220, and 470 μF capacitors are used to demonstrate charging from the TB‐PEH, and these capacitors are saturated at 5.1, 5.0, and 4.9 V during 40, 85, and 175 s charging time, respectively. The energy harvester can generate enough power to directly light up four light emitting diodes in real time, indicating its potential to be used as microenergy source for wireless sensor networks in mechanical vibration circumstance under harmonic vibration excitation. The proposed TB‐PEH is conclusively proved potential for charging low‐power electronic devices.

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On developing an optimal design procedure for a bimorph piezoelectric cantilever energy harvester under a predefined volume

Cited by 22 publications

References 20 publications

Bimorph piezoelectric vibration energy harvester with flexible 3D meshed-core structure for low frequency vibration

Bimorph piezoelectric vibration energy harvester with flexible 3D meshed-core structure for low frequency vibration

A Study on Important Issues for Estimating the Effectiveness of the Proposed Piezoelectric Energy Harvesters under Volume Constraints

Simulation and Experiment of Trapezoidal Beam‐Based Piezoelectric Energy Harvesters

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