Modeling and Simulation of Piezoelectric Devices

Marin, Iuliana; Constantinescu, Florin; Maricaru, Mihai; Hantila, Florea I.; Nitescu, M.; Gheorghe, Alexandru Gabriel

doi:10.5772/5968

Cited by 14 publications

(11 citation statements)

References 10 publications

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“…Kanda et al evaluated the influence of parasitic capacitance on the output voltage for series-connected thin-film piezoelectric devices. In the design of devices that employ output-voltage multiplication, the estimation of the optimum number of series connections and the effect of parasitic capacitances are important [ 47 ]. Here, as obtained from Figure 5 , there is an optimum value for electrospun PVDF/LiCl web thickness, after increasing the thickness up to 350 μm, faced with a reduction in output voltage.…”

Section: Resultsmentioning

confidence: 99%

“…The ball was allowed to fall freely from a fixed height and the output voltages were measured versus time. It was shown that 11.9 g impact mass yielded larger power output voltages compared with those by the smaller 4.9 g mass for both ceramic and polymer piezoelectric materials [ 47 ]. Accordingly, in this paper, an attempt is made to choose a ball weight in this range (16.5 g).…”

Section: Resultsmentioning

confidence: 99%

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Nanofibers-Based Piezoelectric Energy Harvester for Self-Powered Wearable Technologies

et al. 2020

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The demands for wearable technologies continue to grow and novel approaches for powering these devices are being enabled by the advent of new energy materials and novel manufacturing strategies. In addition, decreasing the energy consumption of portable electronic devices has created a huge demand for the development of cost-effective and environment friendly alternate energy sources. Energy harvesting materials including piezoelectric polymer with its special properties make this demand possible. Herein, we develop a flexible and lightweight nanogenerator package based on polyvinyledene fluoride (PVDF)/LiCl electrospun nanofibers. The piezoelectric performance of the developed nanogenator is investigated to evaluate effect of the thickness of the as-spun mat on the output voltage using a vibration and impact test. It is found that the output voltage increases from 1.3 V to 5 V by adding LiCl as additive into the spinning solution compared with pure PVDF. The prepared PVDF/LiCl nanogenerator is able to generate voltage and current output of 3 V and 0.5 μA with a power density output of 0.3 μW cm−2 at the frequency of 200 Hz. It is found also that the developed nanogenerator can be utilized as a sensor to measure temperature changes from 30 °C to 90 °C under static pressure. The developed electrospun temperature sensor showed sensitivity of 0.16%/°C under 100 Pa pressure and 0.06%/°C under 220 Pa pressure. The obtained results suggested the developed energy harvesting textiles have promising applications for various wearable self-powered electrical devices and systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Nanofibers-Based Piezoelectric Energy Harvester for Self-Powered Wearable Technologies

et al. 2020

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“…Referring to the characteristics of PT, the longitudinal mode differs from the mode by 180° phase shift [24]. Therefore, the polarity configuration for longitudinal resonance in this paper will naturally reject the other mode.…”

Section: B Automatic Resonance Tracking With the Bpf Oscillatormentioning

confidence: 97%

“…In the vicinity of resonant frequency, the most commonly used model is the Butterworth-Van Dyke (BVD) model [24]. The PT in resonant mode can be modeled as a band-pass filter with a high quality factor Q.…”

Section: A Equivalent Electromechanical Modelmentioning

confidence: 99%

An Automatic Resonance Tracking Scheme With Maximum Power Transfer for Piezoelectric Transducers

Liu

Colli-Menchi

Gilbert

et al. 2015

IEEE Trans. Ind. Electron.

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This paper presents a novel cost-effective automatic resonance tracking scheme with maximum power transfer (MPT) for piezoelectric transducers (PT). The conventional approaches compensate the PT with complex power factor correction schemes or drive it in resonance using intricate loops with limited operating range. The proposed tracking scheme is based on a band-pass filter (BPF) oscillator, exploiting the PT's intrinsic resonance point through a sensing bridge. It guarantees automatic resonance tracking and maximum electrical power converted into mechanical motion regardless of process variations and environmental interferences. Thus, the proposed BPF oscillator-based scheme was designed for an ultrasonic vessel sealing and dissecting (UVSD) system, where accurate PT displacement regulation over a wide range of loads is required. An amplitude control for a switching power stage was developed to regulate the output mechanical motion and provide different power levels for the specific surgical functions such as sealing and dissecting. A proportional-integral (PI) compensator was developed to ensure stable operation under various loading conditions. The sealing and dissecting functions were verified experimentally in chicken tissue and glycerin.

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“…The equations in (1) represent the material behaviour for which the FEM software solves. The finite element discretization is performed by establishing nodal solution variables and the element shape functions over an element domain which approximates the following solution [15]:…”

Section: Electromechanical Model Of a Linear Piezoelectric Materials Amentioning

confidence: 99%

Finite Element Modeling of a Piezoelectric Composite Beam and Comparative Performance Study of Piezoelectric Materials for Voltage Generation

Nechibvute

Chawanda

Luhanga

2012

ISRN Materials Science

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A comparative study of the traditional PZT ceramics and new single crystals is critical in selecting the best material and optimization of transducer design for applications such as conversion of ambient vibrations into useful electrical energy. However, due to material and fabrication costs and the need for rapid prototyping while optimizing transducer design, primary comparisons can be based on simulation. In this paper, the COMSOL Multiphysics finite element package was used to study the direct piezoelectric effect when an external load is applied at the free end of a piezoelectric composite beam. The primary output parameters such as electric potential and electric field were studied as a function of the input strain and stress. The modeling is presented for the relatively new single crystal lead magnesium niobate-lead titanate (PMN32) and three different lead zirconate titanate ceramics (PZT-5A, PZT-5H, and PZT-4). Material performance was assessed by using a common geometry and identical excitation conditions for the different piezoelectric materials. For each material, there are three analyses performed, namely, static, eigenfrequency, and transient/time-dependent analysis. Comparative results clearly suggest that the new crystal material PMN32 is capable of outperforming presently useing piezoelectric ceramics for voltage generation.

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Modeling and Simulation of Piezoelectric Devices

Cited by 14 publications

References 10 publications

Nanofibers-Based Piezoelectric Energy Harvester for Self-Powered Wearable Technologies

Nanofibers-Based Piezoelectric Energy Harvester for Self-Powered Wearable Technologies

An Automatic Resonance Tracking Scheme With Maximum Power Transfer for Piezoelectric Transducers

Finite Element Modeling of a Piezoelectric Composite Beam and Comparative Performance Study of Piezoelectric Materials for Voltage Generation

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