Modeling and Analysis of a Piezoelectric Energy Harvester with Varying Cross-Sectional Area

Rosa, Maiara; Marqui, Carlos De

doi:10.1155/2014/930503

Cited by 40 publications

(27 citation statements)

References 25 publications

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“…Power generation of linear piezoelectric cantilever beams has been researched in many studies [3][4][5][6]. In order to enhance the power output, the linear cantilever system is required to work under resonance.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Studies on Nonlinear Dynamics and Performance of a Bistable Piezoelectric Cantilever Generator

Guo

Cao

Wang

2015

Shock and Vibration

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A piezo-magneto-elastically coupled distributed-parameter model of a bistable piezoelectric cantilever generator is developed by using the generalized Hamilton principle. The influence of the spacing between two adjacent magnets on the static bifurcation characteristics of the system is studied and the range of magnet spacing corresponding to the bistable states is obtained. Numerical and experimental studies are carried out to analyze the bifurcation, response characteristics, and their impact on the electrical output performance under varying external excitations. Results indicate that interwell limit cycle motion of the beam around the two centers corresponds to optimum power output; interwell chaotic motion and multiperiodic motion including intrawell oscillations are less effective. At a given frequency, the phenomena of symmetric-breaking and amplitude-phase modulation are observed with increase of base excitation. Both period-doubling bifurcation and intermittency routes to chaotic motion in the bistable system are found. It can be observed that the power output is not proportional to the excitation level because of the bifurcation behaviours.

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Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Studies on Nonlinear Dynamics and Performance of a Bistable Piezoelectric Cantilever Generator

Guo

Cao

Wang

2015

Shock and Vibration

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“…Rosa and De Marqui Junior conducted research on the modeling and experimental verification of electromechanically-coupled beams with varying cross-sectional areas [13]. The results of the modeling and experimental verification of the proposed model were reported and compared to Erturk and Inman's reported results [14].…”

Section: Introductionmentioning

confidence: 99%

Trapezoidal Cantilevers with Irregular Cross-Sections for Energy Harvesting Systems

2017

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Abstract:The results of numerical and experimental investigation of trapezoidal cantilevers with irregular cross-sections are presented in this paper. Modifications of the cross-section were made in order to increase strain and improve its distribution in the piezo ceramic layer of a cantilever. The proposed modifications allowed improving the energy conversion coefficient and increasing the power density. The numerical investigation revealed that modifications have a positive influence on strain and its distribution characteristics. Moreover, the electrical characteristics of piezoelectric cantilevers were investigated by employing a numerical model. The analysis of the results revealed that modifications of the cross-section have positively affected the electrical outputs of the cantilevers. The results of the numerical investigation were validated by experimental investigation. Experimental investigation showed that output voltage density was increased by 9.9%, output current density by 6.9% and power density by more than three-times compared with a conventional cantilever.

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“…So, the most common construction for piezoelectric energy harvesting is simple cantilever beam. Many authors investigated various geometrical implementation of the cantilevers [7][8][9][10]. Also, several authors were focused on possibility of improving efficiency of the cantilever by increasing strain level and its distribution along length of the beam [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Multifrequency Piezoelectric Energy Harvester

Čeponis¹,

Mažeika²

2017

Shock and Vibration

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This paper presents results of numerical and experimental investigations related to the piezoelectric energy harvester that operates at multifrequency mode. Employment of such operation principle provides an opportunity for obtaining frequency response characteristics of the harvester with several resonant frequencies and in this way increasing efficiency of the harvester at a wide spectrum of excitation frequencies. The proposed design of the energy harvester consists of five cantilevers which forms square type system. Cross sections of the cantilevers are modified by periodical cylindrical gaps in order to increase strain value and to obtain more uniform strain distribution along the cantilevers. Cantilevers are rigidly connected to each other and compose an indissoluble system. Square type harvester has seismic masses at every corner. These masses are placed under specific angle in order to reduce natural frequencies of the system and to create additional rotation moments in the body of harvester. Results of the numerical investigation revealed that harvester has five resonance frequencies in the range from 15 Hz to 300 Hz. Numerical analysis of the harvester revealed that the highest open circuit voltage density is 19.85 mV/mm 3 . Moreover, density of the total electrical energy reached 27.5 J/mm 3 . Experimental investigation confirmed that frequency response characteristics are obtained during numerical investigation and showed that energy density of the whole system reached 30.8 J/mm 3 .

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Modeling and Analysis of a Piezoelectric Energy Harvester with Varying Cross-Sectional Area

Cited by 40 publications

References 25 publications

Numerical and Experimental Studies on Nonlinear Dynamics and Performance of a Bistable Piezoelectric Cantilever Generator

Numerical and Experimental Studies on Nonlinear Dynamics and Performance of a Bistable Piezoelectric Cantilever Generator

Trapezoidal Cantilevers with Irregular Cross-Sections for Energy Harvesting Systems

Investigation of Multifrequency Piezoelectric Energy Harvester

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