A Design Procedure for Wideband Micropower Generators

Soliman, Mostafa; Abdel‐Rahman, Eihab; El-Saadany, Ehab F.; Mansour, Raafat R.

doi:10.1109/jmems.2009.2031695

Cited by 82 publications

(47 citation statements)

References 20 publications

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“…The jump frequencies are determined mainly by the stiffness and damping of the end stops and the driving force. The jump phenomenon has been observed in energy harvesting devices by several groups (Soliman et al 2008(Soliman et al , 2009Tvedt et al 2010;Blystad et al 2010).…”

Section: Measurementsmentioning

confidence: 97%

“…At these large displacements, nonlinear effects occur. End stop effects for an electromagnetic micro power generator were reported in (Soliman et al 2008(Soliman et al , 2009) who showed that the bandwidth increases during frequency up-sweep and that this is a potentially useful means to improve energy harvester performance when the vibration frequency varies. We found similar effects when modeling a piezoelectric MEMS energy harvester (Blystad et al 2010).…”

Section: Introductionmentioning

confidence: 96%

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A piezoelectric energy harvester with a mechanical end stop on one side

Blystad

Halvorsen

2010

Microsyst Technol

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Nonlinear effects as severe as proof mass impact on mechanical end stops are potentially useful for energy harvesting. In this paper, we present measurements and modeling of a piezoelectric energy harvester with a mechanical end stop on one side. At high acceleration levels we observe nonlinear effects related to impacts on the end stop such as an enlarged up-sweep bandwidth in frequency sweeps. Based on SPICE simulations of an electrical equivalent circuit for the device, we show that modeling of the end stop as a parallel spring-dashpot system is sufficient to recapture the energy harvester behavior.

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Section: Measurementsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 96%

A piezoelectric energy harvester with a mechanical end stop on one side

Blystad

Halvorsen

2010

Microsyst Technol

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“…However, the magnitudes of the voltage are needed to be acquired from the simulation first. Meanwhile, the current flow on the circuit can be simply calculated by using the current equation at the specified frequency by using the Equation 6. It shows that capacitor reactance, C whereby at a given resonant frequency, f can be calculated by using the Equation 7 with the properties of the capacitance given in the Table 3 later.…”

Section: Calculation Of Electromagnet Outputmentioning

confidence: 99%

“…It is found that the induced voltage is proportional to the increment of the number of turns and the length of beams. Moreover, Soliman et al [6] presented a mechanical stopper that is in the range of motion of a cantilever beam in order to increase the range of operation. When the beam is contact with the stopper, the stiffness of the beam would rises and causing the alteration on the resonance frequency of the system.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of hybrid energy harvesting of piezoelectric and electromagnetic

et al. 2016

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Abstract.Harvesting energy from ambient vibrations is a highly required method because of the wide range of available sources that produce vibration energy application from industrial machinery to human motion application. In this paper, the implementation of harvesting energy from two technologies to form a hybrid energy harvester system was analyzed. These two technologies involve the piezoelectric harvesting energy and the electromagnetic harvesting energy. A finite element model was developed using the Ansys software with the harmonic analysis solver to analyze and examine hybrid harvesting energy system. Both power output generated from the magnet and the piezoelectric is then combined to form one unit of energy. Further, it was found that the result shows the system generate the maximum power output of 14.85 µW from 100 Hz, 4.905 m/s2, and 0.6 cm3 for resonance frequency, acceleration, and the volume respectively from the optimal energy harvester design. Normalized Power Density (NPD) result of 10.29 kgs/m3 comparable with other literature also can be used in energy harvesting system for vibration application.

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“…Among the different types of nonlinearities those with softening and hardening are broadening the resonance regions into smaller and larger frequencies, respectively. Especially the nonlinear impacting harvesters with stoppers, derived from the idea of Soliman et al [9] and followed in other papers [10,11]. Electrostatic and piezoelectric impacting harvesters were investigated also in [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Vibration energy harvesting by a Timoshenko beam model and piezoelectric transducer

Stoykov

Litak

Manoach

2015

Eur. Phys. J. Spec. Top.

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Abstract. An electro-mechanical system of vibrational energy harvesting is studied. The beam is excited by external and kinematic periodic forces and damped by an electrical resistor through the coupled piezoelectric transducer. Nonlinearities are introduced by stoppers limiting the transverse displacements of the beam. The interaction between the beam and the stoppers is modeled as Winkler elastic foundation. The mechanical properties of the piezoelectric layer are taken into account and the beam is modeled as a composite structure. For the examined composite beam, the geometrically nonlinear version of the Timoshenko's beam theory is assumed. The equations of motion are derived by the principle of virtual work considering large deflections. An isogeometric approach is applied for space discretization and B-Splines are used as shape functions. Finally, the power output and the efficiency of the system due to harmonic excitations are discussed. The influence of the position of the stoppers and their length on the dynamics of the beam and consequently on the power output are analyzed and presented.

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A Design Procedure for Wideband Micropower Generators

Cited by 82 publications

References 20 publications

A piezoelectric energy harvester with a mechanical end stop on one side

A piezoelectric energy harvester with a mechanical end stop on one side

Finite element analysis of hybrid energy harvesting of piezoelectric and electromagnetic

Vibration energy harvesting by a Timoshenko beam model and piezoelectric transducer

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