Comparative study of core materials and multi-degree-of-freedom sandwich piezoelectric energy harvester with inner cantilevered beams

2019 ◽  
Vol 52 (23) ◽  
pp. 235501 ◽  
Author(s):  
Xiangyang Li ◽  
Kaiping Yu ◽  
Deepesh Upadrashta ◽  
Yaowen Yang
Keyword(s):  
Comparative Study ◽  
Energy Harvester ◽  
Degree Of Freedom ◽  
Piezoelectric Energy ◽  
Cantilevered Beams ◽  
Core Materials

Comparative study of conventional and magnetically coupled piezoelectric energy harvester to optimize output voltage and bandwidth

2016 ◽  
Vol 23 (7) ◽  
pp. 2663-2674 ◽  
Author(s):  
Dauda Sh. Ibrahim ◽  
Asan G. A. Muthalif ◽  
N. H. Diyana Nordin ◽  
Tanveer Saleh
Keyword(s):  
Comparative Study ◽  
Output Voltage ◽  
Energy Harvester ◽  
Piezoelectric Energy

Analysis of broadband characteristics of two degree of freedom bistable piezoelectric energy harvester

2018 ◽  
Vol 5 (8) ◽  
pp. 085704 ◽  
Author(s):  
Dan Zhao ◽  
Minyao Gan ◽  
Chihang Zhang ◽  
Jundong Wei ◽  
Shaogang Liu ◽  
...  
Keyword(s):  
Energy Harvester ◽  
Degree Of Freedom ◽  
Piezoelectric Energy ◽  
Two Degree Of Freedom

Theoretical modeling and analysis of a 2-degree-of-freedom hybrid piezoelectric–electromagnetic vibration energy harvester with a driven beam

2018 ◽  
Vol 29 (11) ◽  
pp. 2465-2476 ◽  
Author(s):  
Dan Zhao ◽  
Shaogang Liu ◽  
Qingtao Xu ◽  
Wenyi Sun ◽  
Tao Wang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Output Power ◽  
Energy Harvester ◽  
Degree Of Freedom ◽  
Energy Output ◽  
Vibration Energy ◽  
Vibration Energy Harvester ◽  
Piezoelectric Energy ◽  
Electromagnetic Vibration ◽  
Operating Bandwidth

In the article, a novel 2-degree-of-freedom hybrid piecewise-linear piezoelectric–electromagnetic vibration energy harvester is presented to achieve better energy harvesting efficiency. The harvester consists of a primary piezoelectric energy harvesting device to which an electromagnetic mechanism is coupled to improve the integral energy output, and a driven beam is mounted to broaden the operating bandwidth by inducing nonlinearity. Considering the piezoelectric–electromagnetic coupling characteristics and the nonlinear factors, dynamic equations of the system are established. Expressions of the output power are deduced though averaging method. Characteristic parameters are analyzed theoretically, including the piezoelectric parameters, electromagnetic parameters, and the piecewise-linearity. Frequency sweep excitation test is conducted on the setup at an excitation acceleration of 0.3 g and results demonstrate that two resonant regions are obtained with the peak output power of 5.4 and 6.49 mW, respectively, and the operating bandwidth is increased by 8 Hz. Moreover, though adjusting the stiffness of the driven beam k3 and the gap between the primary beam and the driven beam d, the performance of the harvester can be further optimized.

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