Modeling and analysis of micro piezoelectric power generators for micro-electromechanical-systems applications

Lu, Feifei; Lee, H P; Lim, Siak Piang

doi:10.1088/0964-1726/13/1/007

Cited by 408 publications

(272 citation statements)

References 9 publications

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“…Further modelling and analysis of the influence of load resistance on the output power of cantilevered piezoelectric bimorph generators has been presented by Lu et al [64]. The optimum load was found to vary for different piezoelectric generators as shown in equation (20) where t is the thickness of piezoelectric layer, b beam width, L is the length of the piezoelectric film on the beam, ε 33 the dielectric constant, ω the frequency and C p is the capacitance of piezoelectric element:…”

Section: Cantilever-based Piezoelectric Generatorsmentioning

confidence: 99%

Energy harvesting vibration sources for microsystems applications

Beeby

Tudor

White

2006

Meas. Sci. Technol.

2,632

1,468

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This paper reviews the state-of-the art in vibration energy harvesting for wireless, self-powered microsystems. Vibration-powered generators are typically, although not exclusively, inertial spring and mass systems. The characteristic equations for inertial-based generators are presented, along with the specific damping equations that relate to the three main transduction mechanisms employed to extract energy from the system. These transduction mechanisms are: piezoelectric, electromagnetic and electrostatic. Piezoelectric generators employ active materials that generate a charge when mechanically stressed. A comprehensive review of existing piezoelectric generators is presented, including impact coupled, resonant and human-based devices. Electromagnetic generators employ electromagnetic induction arising from the relative motion between a magnetic flux gradient and a conductor. Electromagnetic generators presented in the literature are reviewed including large scale discrete devices and wafer-scale integrated versions. Electrostatic generators utilize the relative movement between electrically isolated charged capacitor plates to generate energy. The work done against the electrostatic force between the plates provides the harvested energy. Electrostatic-based generators are reviewed under the classifications of in-plane overlap varying, in-plane gap closing and out-of-plane gap closing; the Coulomb force parametric generator and electret-based generators are also covered. The coupling factor of each transduction mechanism is discussed and all the devices presented in the literature are summarized in tables classified by transduction type; conclusions are drawn as to the suitability of the various techniques.

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Section: Cantilever-based Piezoelectric Generatorsmentioning

confidence: 99%

Energy harvesting vibration sources for microsystems applications

Beeby

Tudor

White

2006

Meas. Sci. Technol.

2,632

1,468

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“…where − · · · dt denotes the average over time [26,33]. Above W e is the time-averaged power dissipated across the load resistor R and W in is the time-averaged power done by the external force.…”

Section: Conversion Efficiency and Electrically Induced Dampingmentioning

confidence: 99%

“…It is (loss factor) max e = k 2 sys π , (Lesieutre et al [37]) (26) for small values of k 2 sys which is defined by…”

Section: Conversion Efficiency and Electrically Induced Dampingmentioning

confidence: 99%

Efficiency of energy conversion for a piezoelectric power harvesting system

Shu

Lien

2006

J. Micromech. Microeng.

284

204

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This paper studies the energy conversion efficiency for a rectified piezoelectric power harvester. An analytical model is proposed, and an expression of efficiency is derived under steady-state operation. In addition, the relationship among the conversion efficiency, electrically induced damping and ac-dc power output is established explicitly. It is shown that the optimization criteria are different depending on the relative strength of the coupling. For the weak electromechanical coupling system, the optimal power transfer is attained when the efficiency and induced damping achieve their maximum values. This result is consistent with that observed in the recent literature. However, a new finding shows that they are not simultaneously maximized in the strongly coupled electromechanical system.

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“…The charge Q and current I are functions of the time and therefore the current amplitude can be obtained by the charge times the frequency [26]:…”

Section: Theoretical Model For Energy Harvestingmentioning

confidence: 99%

Energy harvesting behaviour for aircraft composites structures using macro-fibre composite: Part I – Integration and experiment

Shi

Hallett

Zhu

2017

Composite Structures

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Abstract: This paper investigates new ways to integrate piezoelectric energy harvesting elements onto carbon-fibre composite structures, using a new bonding technique with a vacuum bag system and co-curing process, for fabrication onto airframe structures. Dynamic mechanical vibration tests were performed to characterise the energy harvested by the various integration methods across a range of different vibration frequencies and applied mechanical input loadings. An analytical model was also introduced to predict the power harvested under the mechanical vibrations as a benchmark to evaluate the proposed methods. The developed co-curing showed a high efficiency for energy harvesting at a range of low frequencies, where the co-curing method offered a maximum improvement of 14.3% compared to the mechanical bonding approach at a frequency of 10Hz. Furthermore, co-curing exhibited potential at high frequency by performing the sweep test between frequencies of 1-100 Hz. Therefore, this research work offers potential integration technology for energy harvesting in complicated airframe structures in aerospace applications, to obtain the power required for environmental or structural health monitoring.

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Modeling and analysis of micro piezoelectric power generators for micro-electromechanical-systems applications

Cited by 408 publications

References 9 publications

Energy harvesting vibration sources for microsystems applications

Energy harvesting vibration sources for microsystems applications

Efficiency of energy conversion for a piezoelectric power harvesting system

Energy harvesting behaviour for aircraft composites structures using macro-fibre composite: Part I – Integration and experiment

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