Electromechanical Model of a Tapered Piezoelectric Energy Harvester

Syed, Wajih U.; Bojesomo, Alabi; Elfadel, Ibrahim M.

doi:10.1109/jsen.2018.2841359

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…In (32), V R L is the peak value of the output voltage provided by the piezoelectric element. Also, in (33), R 0 represents the AC-DC rectifier load that was replaced by V 0 .…”

Section: Piezo-harvester Based On Class-e Resonant Rectifiermentioning

confidence: 99%

“…It represents the piezoelectric component as a piezo-patch energy harvester in which a velocity proportional current in parallel to an equivalent piezoelectric capacitance is used. The present work and [16], [26], [31] use the electromechanical representation and [32] resorts to the cantilever characterization. Real system parameters are used in [17], [19], [24], [26], [31]- [33].…”

Section: Comparison With Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Normalized Modeling of Piezoelectric Energy Harvester Based on Equivalence Transformation and Unit-Less Parameters

Mendonca

Martins

Radecker

et al. 2019

J. Microelectromech. Syst.

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Micro-electromechanical systems are ubiquitous in several energy harvesting solutions and can be used in applications such as bio-implantable devices and wireless micro-sensors. Piezoelectricity is an interesting key to perform the interface between environmental extracted energy and the power delivered to the load due to the use of mechanical vibration and resonance features. However, it is necessary for a detailed analysis in order to obtain an accurate understanding of the system. In this regard, some works deal with the normalization procedures to analyze the piezoelectric component behavior based on the mechanical resonance frequency. In order to enhance the system modeling, the electromechanical resonance frequency must also be analyzed. This paper deals with an approach to model the piezoelectric component that allows analyzing several unitless parameters that are critical to improve the performance of the system. In addition, a state-space model for the piezo-harvester based on the Class-E resonant rectifier is presented. Some experimental results are shown to validate the theoretical approach.[2019-0082]

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“…In (32), V R L is the peak value of the output voltage provided by the piezoelectric element. Also, in (33), R 0 represents the AC-DC rectifier load that was replaced by V 0 .…”

Section: Piezo-harvester Based On Class-e Resonant Rectifiermentioning

confidence: 99%

Section: Comparison With Related Workmentioning

confidence: 99%

Normalized Modeling of Piezoelectric Energy Harvester Based on Equivalence Transformation and Unit-Less Parameters

Mendonca

Martins

Radecker

et al. 2019

J. Microelectromech. Syst.

View full text Add to dashboard Cite

show abstract

“…Various numerical models have been established to acquire the coupling characteristics, amplitude-frequency characteristics, and structural properties of energy harvesters with different structures; develop calibration criteria and methods; and predict and characterize experimental results. Such models include the high-precision lumped parameter model, 26 finite element method multimode analytical model, 27 unimode cantilever enclosed frequency-varying functional model, 8 disorderly loosely-coupled resonator model, 28 nonlinear model based on Hamilton’s principle 29 and its electromechanical coupling dynamic model, 30 and shearing piezoelectric cantilever electromechanical coupling model. 31 In particular, for nonlinear processes in which different geometric features, material constructions, and damping are considered, the strain gradient theory, 32 Timoshenko model, 33,34 and Hamiltonian principle 35,36 are effective in analyzing free vibration, bending, and electric potential effects, 37,38 thermal effects, 39 humidity, 40 and multiphysics loads 41 on sandwich transducers.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric generator with nonlinear structure

Wang

Liu

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Motion in nature is usually a low-frequency vibration such as walking, running, swinging arms, and so on, but traditional piezoelectric cantilever structures are inefficient at harvesting energy from low-frequency vibrations. T in the environment. To overcome this, a novel piezoelectric generator was designed. A cantilevered bimorph with a tip mass and a pair of preloading springs were fixed on its base to form a nonlinear piezoelectric generator. The energy transmission in the structure was analyzed. The harvester was modeled as a Euler–Bernoulli beam, and the piezoelectric material was assumed to be linear. The bending vibration was calculated using the Rayleigh–Ritz procedure, and the frequency characteristics of the output voltage were analyzed under different preloading distances. It was found that changing the preloading of the spring helped reduce the natural frequency of the cantilever, which facilitated conversion of ambient low-frequency vibrations into electrical energy. Then, the characteristics of low frequency energy harvesting were investigated experimentally. The theoretical results were consistent with the experimental data; moreover, the resonance frequency, which changes with the preloading distance, reduced from 43 to 35 Hz when the preloading distance was increased from 0 to 1 mm. In this paper, an effective structure to control the resonant frequency is proposed and its motion equation stated. The structure has potential for applications in predicting the effect of preloading distance on resonance frequency.

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“…VEH (Vibration energy harvester) is a device proposed to convert mechanical energy into electric energy [1][2][3][4] . The traditional piezoelectric VEH just absorbs the vertical force scalar at the top surface of mass block, so the efficiency of the energy harvester decreases obviously when the direction deviates from the optimal direction [5] .…”

Section: Introductionmentioning

confidence: 99%

A Novel Quarter‐Circular Arc Multi‐Direction Piezoelectric VEH and Its Theoretical Model

Zhu

Jiayang

Bai

et al. 2021

Chinese J of Electronics

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A quarter‐circular arc piezoelectric Vibration energy harvester (VEH) based on nonlinear geometry is proposed with both bending moment and torque deformation mode, so it can effectively absorb multidirectional vibration at the same resonance frequency. The theoretical model of quarter‐circular arc piezoelectric VEH is established to study the resonance frequency and the output voltage. In order to demonstrate multi‐directional performance of the quarter‐circular arc VEH, the stress distribution is compared with that of the traditional piezoelectric VEH in multi‐direction vibration, and the output voltage of the circular arc piezoelectric VEH are relatively increased 267.26% in X‐direction, 463.18% in Y‐direction, and 17.24% in Z‐direction. The external load is equipped in circuit to measure output power, whose matching resistance is around 21kΩ, and the maximum output powers are 7.57mW in X‐direction, 2.39mW in Y‐direction, and 9.93mW in Z‐direction.

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Electromechanical Model of a Tapered Piezoelectric Energy Harvester

Cited by 13 publications

References 20 publications

Normalized Modeling of Piezoelectric Energy Harvester Based on Equivalence Transformation and Unit-Less Parameters

Normalized Modeling of Piezoelectric Energy Harvester Based on Equivalence Transformation and Unit-Less Parameters

Piezoelectric generator with nonlinear structure

A Novel Quarter‐Circular Arc Multi‐Direction Piezoelectric VEH and Its Theoretical Model

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