Low Frequency Vibration Energy Harvester Using Stopper-Engaged Dynamic Magnifier for Increased Power and Wide Bandwidth

Halim, Miah A.; Kim, Dae Heum; Park, Jae Yeong

doi:10.5370/jeet.2016.11.3.707

Cited by 37 publications

(13 citation statements)

References 31 publications

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“…Umeda et al [23] earlier used a free-fall ball to collide a piezoelectric beam to harvest the low-frequency vibration energy. Halim et al [24] and Halim and Park [25][26] designed several kinds of low-frequency VEHs using stopper-engaged dynamic magnifier. Liu et al [27] proposed a stopper VEH to increase the energy conversion bandwidth by limiting the vibration amplitude through mechanical stoppers, while the power output was decreased.…”

Section: Introductionmentioning

confidence: 99%

Low-frequency and broadband vibration energy harvester driven by mechanical impact based on layer-separated piezoelectric beam

Cao

Xia

2019

Appl. Math. Mech.-Engl. Ed.

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Vibration energy harvesting is to transform the ambient mechanical energy to electricity. How to reduce the resonance frequency and improve the conversion efficiency is very important. In this paper, a layer-separated piezoelectric cantilever beam is proposed for the vibration energy harvester (VEH) for low-frequency and wide-bandwidth operation, which can transform the mechanical impact energy to electric energy. First, the electromechanical coupling equation is obtained by the Euler-Bernoulli beam theory. Based on the average method, the approximate analytical solution is derived and the voltage response is obtained. Furthermore, the physical prototype is fabricated, and the vibration experiment is conducted to validate the theoretical principle. The experimental results show that the maximum power of 0.445 mW of the layer-separated VEH is about 3.11 times higher than that of the non-impact harvester when the excitation acceleration is 0.2 g. The operating frequency bandwidth can be widened by increasing the stiffness of the fundamental layer and decreasing the gap distance of the system. But the increasing of operating frequency bandwidth comes at the cost of reducing peak voltage. The theoretical simulation and the experimental results demonstrate good agreement which indicates that the proposed impact-driving VEH device has advantages for low-frequency and wide-bandwidth. The high performance provides great prospect to scavenge the vibration energy in environment.

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Section: Introductionmentioning

confidence: 99%

Low-frequency and broadband vibration energy harvester driven by mechanical impact based on layer-separated piezoelectric beam

Cao

Xia

2019

Appl. Math. Mech.-Engl. Ed.

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“…Adding a coupled linear dummy oscillator that is similarly driven to a tuned hardening-type nonlinear harvester improves upon the uncoupled case without introducing the drawbacks of the inspiring designs. Similar to the reverse system with a linear harvester and nonlinear dynamic magnifier as shown in Halim et al (2016), models suggest that the addition of a linear excited dynamic magnifier to a nonlinear harvester results in an increased peak kinetic energy of the primary oscillator, at a wider bandwidth and without the undesirable central valley observed in linear coupled systems. Analytical and numerical analysis will show that this coupled system can outperform the uncoupled case even when total system mass is held constant and does not require the significant added cost as in arrays where multiple energy harvesters are used.…”

Section: Introductionmentioning

confidence: 78%

Increasing viability of nonlinear energy harvesters by adding an excited dynamic magnifier

Bernard

Mann

2017

Journal of Intelligent Material Systems and Structures

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Dynamic magnifiers and coupled harvester arrays are two strategies that have been developed over the past decade to improve the peak power and bandwidth of energy harvesters. However, both of these methods come with drawbacks. Dynamic magnifiers require retuning since they change the frequency of the peak response and some designs result in decreased power per unit mass. Coupled harvester arrays can increase the overall bandwidth, but also include central valleys between the peaks and a significant increase in the cost. This article describes an excited dynamic magnifier which borrows design characteristics from both traditional dynamic magnifiers and harvester arrays in order to overcome these drawbacks. A hardening-type nonlinear tuned energy harvester with excited dynamic magnifier can achieve higher peak power, greater power per unit mass, and wider bandwidth without the need for retuning and for a minimal added cost as compared to the uncoupled harvester. Most importantly, the addition of a dynamic energy harvester also significantly improves performance in the frequency range of coexisting solutions by expanding the basin of attraction for the larger amplitude solution.

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“…In recent years, vibroimpact models were introduced to vibration energy harvesters to improve the harvesting efficiency. Halim et al (Halim and Park, 2014;Halim et al, 2016) presented piezoelectric-based energy harvesters with a stopper-engaged dynamic magnifier that can be able to increase the operating bandwidth. Gu (2011) designed a low-frequency VEH based on periodic impact motions for energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Modeling and experiment of vibro-impact vibration energy harvester based on a partial interlayer-separated piezoelectric beam

Cao

Xia

Guo

et al. 2020

Journal of Intelligent Material Systems and Structures

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Piezoelectric-based energy harvesting techniques offer a promising way to transform vibration energy into electric energy. However, many vibration energy harvesters (VEH) can only work under narrow bandwidths and limited high frequencies to restrict their working performance. In this paper, a vibro-impact piezoelectric VEH is proposed, where a partial interlayer-separated piezoelectric beam is designed to improve the voltage output and frequency bandwidth of the VEH. First, the mechanism of the proposed VEH is introduced and the electromechanical model is derived based on the Euler-Bernoulli beam theory and vibro-impact dynamic model. Voltage-frequency responses are then obtained by using an approximate analytical method. In addition, the effect of partial interlayer-separated piezoelectric beams on the energy harvesting performance is investigated numerically. A parametric study is performed to investigate the influence of system parameters on the voltage output in terms of bandwidth and magnitude. Finally, the theoretical solutions are validated by experimental results, the voltage output of the proposed VEH is higher than the non-impact type. The maximum output power of the proposed VEH is about 12 times more than that of the conventional one under a 0.2 g acceleration. Due to the good agreement of the variation trend between the theoretical values and experiment results, the proposed partial interlayer-separated beam VEH can be used for a further optimization of the vibration energy harvester.

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Low Frequency Vibration Energy Harvester Using Stopper-Engaged Dynamic Magnifier for Increased Power and Wide Bandwidth

Cited by 37 publications

References 31 publications

Low-frequency and broadband vibration energy harvester driven by mechanical impact based on layer-separated piezoelectric beam

Low-frequency and broadband vibration energy harvester driven by mechanical impact based on layer-separated piezoelectric beam

Increasing viability of nonlinear energy harvesters by adding an excited dynamic magnifier

Modeling and experiment of vibro-impact vibration energy harvester based on a partial interlayer-separated piezoelectric beam

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