Micro-Electrostatic Vibration-to-Electricity Converters

Roundy, Shad; Wright, Paul K.; Pister, Kristofer S. J.

doi:10.1115/imece2002-39309

Cited by 227 publications

(167 citation statements)

References 12 publications

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“…In order to have an efficient photovoltaic cell, the light direction must be direct and perpendicular to the surface of the cell. Without a direct and high intensity light, the generating capacity of the cell can decrease drastically from 15mW/cm 2 in direct sunlight to 10µW/cm 2 in normal office lighting [46].…”

Section: Photovoltaic Generationmentioning

confidence: 99%

MRI-based communication for untethered intelligent medical microrobots

Sharafi

Olamaei

2015

J Micro-Bio Robot

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Section: Photovoltaic Generationmentioning

confidence: 99%

MRI-based communication for untethered intelligent medical microrobots

Sharafi

Olamaei

2015

J Micro-Bio Robot

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“…The out-of-plane gap closing structure uses two plates that one of them is fixed and the other one is movable as shown in Figure 3 [9]. …”

Section: Figure 2simple Circuit Representation For Electrostatic Convmentioning

confidence: 99%

“…The mass is damped by two forces, the mechanical damping ( ) and electrically induced damping ( ) that stand for the energy removed from the mechanical subsystem and stored in the electrical subsystem [9].…”

Section: Figure 1mechanical Schematic Of Mems Structurementioning

confidence: 99%

Mechanical Behavior of A MEMS Based Capacitive Energy Harvester

Azizi

Rahimpour

Rad

2017

KJAR

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Energy harvesting is defined as a technology that converts the available excess energy in the environment into usable energy for low power consuming electronics. Past researches on vibration energy harvesting has focused mainly on the use of magnets or piezoelectric materials as the basis of energy transduction. This paper presents a new design for extracting energy using an electrostatic capacitive energy harvester which can be considered as a combination of charge constrained and voltage constrain cycles. In previous analyses, the constant charge and constant voltage operation were studied separately, but in this work both of these operations have been studied in a combination with each other. In this paper, the variable capacitor is formed by an out of plane gap closing structure. In order to investigate the mechanical behaviour of the capacitive energy harvester, a rectangular micro plate is considered with geometrical and material properties. Due to the nonlinearity and low displacement amplitude that result from electrostatic force, energy can be generated. In order to study the primer factors for increasing generated energy, geometrical parameters of the system have been changed. Time history of the shuttle mass and micro-plate undergone vibration are illustrated. It must be noted that after several cycle vibration of the plate, it reaches to stability and regular cycles.

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“…These are piezoelectric, 1 electromagnetic, 2 and electrostatic. 3 The comparison between maximum energy densities of these three transducers is given in Table 1. 4 In the present study, piezoelectric materials have been used because they have relatively simple configurations and a high conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Energy Harvesting Estimation from the Vibration of a Simply Supported Beam

Rajora¹,

Dwivedi²,

Vyas³

et al. 2017

IJAV

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Vibration-based energy harvesting has been investigated in this paper with the goal to utilize the ambient vibration energy to power small electronic components by converting vibration energy into electrical energy. A simply supported beam with a bonded high density piezoelectric patch to the surface is considered for the analysis. Analytical model for free vibration analysis is developed by starting with the linear constitutive relations for the beam and the patch. The equation of motion for transverse vibration of the beam is developed by considering the elastic as well as electrical properties in the generalized Hookes law and accordingly a transverse displacement function satisfying the simply supported boundary conditions is used for achieving the modal frequencies. Additionally, an analytical model is developed in order to estimate the energy generated under the action of a harmonic force applied on the surface of the patch. The results of the analytical model are validated using simulation software ANSYS and COMSOL.The developed analytical model is used to study the behavior of a simply supported harvester with various patch dimensions and locations. This paper throws light on parametric studies of eigen frequencies as well as extracted power corresponding to operating conditions.

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Micro-Electrostatic Vibration-to-Electricity Converters

Cited by 227 publications

References 12 publications

MRI-based communication for untethered intelligent medical microrobots

MRI-based communication for untethered intelligent medical microrobots

Mechanical Behavior of A MEMS Based Capacitive Energy Harvester

Energy Harvesting Estimation from the Vibration of a Simply Supported Beam

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