scholarly journals Piezoelectric bistable buckled beam energy harvester.

2017 ◽  
Author(s):  
Brian Allgeier
Keyword(s):  
Beam Energy ◽  
Energy Harvester ◽  
Buckled Beam

scholarly journals A piezoelectric energy harvester for broadband rotational excitation using buckled beam

AIP Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 015125 ◽  
Author(s):  
Zhengqiu Xie ◽  
C. A. Kitio Kwuimy ◽  
Zhiguo Wang ◽  
Wenbin Huang
Keyword(s):  
Energy Harvester ◽  
Rotational Excitation ◽  
Piezoelectric Energy ◽  
Buckled Beam

scholarly journals Design and Experimental Investigation of a Piezoelectric Rotation Energy Harvester Using Bistable and Frequency Up-Conversion Mechanisms

2018 ◽  
Vol 8 (9) ◽  
pp. 1418 ◽  
Author(s):  
Zhengqiu Xie ◽  
Jitao Xiong ◽  
Deqi Zhang ◽  
Tao Wang ◽  
Yimin Shao ◽  
...  
Keyword(s):  
Output Power ◽  
Electromechanical Coupling ◽  
Energy Harvester ◽  
Average Power ◽  
Low Speed ◽  
Buckled Beam ◽  
Electrical Devices ◽  
Speed Rotation ◽  
Rotation Energy ◽  
High Output

Harvesting energy from rotational motion for powering low-power electrical devices is attracting increasing research interest in recent years. In this paper, a magnetic-coupled buckled beam piezoelectric rotation energy harvester (MBBP-REH) with bistable and frequency up-conversion is presented to harvest low speed rotational energy with a broadband. A buckled beam attached with piezoelectric patches under dynamical axial load enables the harvester to achieve high output power under small excitation force. The electromechanical coupling dynamical model is developed to characterize the MBBP-REH. Both the simulations and experiments are carried out to evaluate the performance of the harvesters in various conditions under different excitations. The experimental results indicate that the proposed harvester is applicable for low speed rotation and can generate stable output power under wideband rotating excitation. For the harvester with two magnets that produce attractive forces with the center magnet of the buckled beam, the average power is 682.7 μW and the maximum instantaneous power is 1450 μW at 360 r/min.

Experimental and Simulation Investigations of the Cantilever Beam Energy Harvester

2016 ◽  
Vol 248 ◽  
pp. 249-255
Author(s):  
Radosław Nowak ◽  
Marek Pietrzakowski
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Cantilever Beam ◽  
Beam Energy ◽  
Energy Harvester ◽  
Mechanical Energy ◽  
Element Model ◽  
Piezoelectric Energy ◽  
Piezoelectric Elements ◽  
Analytical Approaches

Machines, cars suspensions, buildings steel constructions etc. usually generate vibrations, which can be the excitement signal for piezoelectric energy harvesters. The piezoelectric patches attached to the vibrating construction have ability to convert mechanical energy of harmful vibrations into electrical energy.The goal of the study was to verify a finite element model of the piezoelectric beam energy harvester by comparing results of numerical simulations with those obtained experimentally. The stand used in the experiment consists of the cantilever beam with piezoelectric elements attached, which is excited by the base harmonic movement. The transverse displacements of the selected beam’s point and the base, and also the frequency of vibrations were observed and measured using an accelerometer and a B&K Pulse platform. A portable data acquisition module was used to quantify the voltage generated by the piezoelectric layers.The finite element model was built in ANSYS software. The beam and piezoelectric layers were modeled by twenty node elements with an additional electric degree of freedom for piezoelectric elements. A full piezoelectric matrix was used in the finite element analysis instead of a one-dimensional piezoelectric effect, which dominates in many analytical approaches. It allowed building a more accurate model of the system. The experimental tests and finite element method simulations were performed and acquired results were compared. The characteristics of voltage amplitude in the time and frequency domain were shown and discussed.

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