A Highly Robust Out-of-Plane Electrostatic Vibration Energy Harvester with Wide Bandwidth

2018 ◽  
Author(s):  
Xiang Wang ◽  
Baofa Hu ◽  
Yang Ma ◽  
Changsong Chen ◽  
Haisheng San
Keyword(s):  
Energy Harvester ◽  
Vibration Energy ◽  
Wide Bandwidth ◽  
Vibration Energy Harvester ◽  
Out Of Plane

Out-of-plane Gap Closing Electrostatic Vibration Energy Harvester

2021 ◽  
Author(s):  
Valery P. Dragunov ◽  
Dmitriy I. Ostertak ◽  
Konstantin G. Pelmenev ◽  
Vitaly Yu. Dorzhiev
Keyword(s):  
Energy Harvester ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Out Of Plane ◽  
Gap Closing

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

2019 ◽  
Vol 40 (12) ◽  
pp. 1777-1790 ◽  
Author(s):  
Dongxing Cao ◽  
Wei Xia ◽  
Wenhua Hu
Keyword(s):  
Energy Harvester ◽  
Low Frequency ◽  
Experimental Results ◽  
Operating Frequency ◽  
Vibration Energy ◽  
Theoretical Principle ◽  
Frequency Bandwidth ◽  
Wide Bandwidth ◽  
Vibration Energy Harvester ◽  
Mechanical Impact

AbstractVibration 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 □W 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.

Broadband vibration energy harvester utilizing three out-of-plane modes of one vibrating body

2017 ◽  
Vol 26 (10) ◽  
pp. 105049 ◽  
Author(s):  
Shi-Baek Park ◽  
Seon-Jun Jang ◽  
In-Ho Kim ◽  
Yong Je Choi
Keyword(s):  
Energy Harvester ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Out Of Plane

Simply supported FPEDs connected by springs for broadband energy harvesting

2020 ◽  
Vol 64 (1-4) ◽  
pp. 201-210
Author(s):  
Yoshikazu Tanaka ◽  
Satoru Odake ◽  
Jun Miyake ◽  
Hidemi Mutsuda ◽  
Atanas A. Popov ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Evaluation Method ◽  
Energy Harvester ◽  
Vibrational Energy ◽  
Functional Materials ◽  
Vibration Energy ◽  
Theoretical Evaluation ◽  
Vibration Energy Harvester ◽  
Polyvinylidene Difluoride ◽  
Simply Supported

Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency band for ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

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