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Dissertations / Theses on the topic 'Piezoelectric energy'

Author: Grafiati

Published: 10 December 2022

Last updated: 31 July 2025

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1

Kwon, Dongwon. "Piezoelectric kinetic energy-harvesting ics." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47571.

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Wireless micro-sensors can enjoy popularity in biomedical drug-delivery treatments and tire-pressure monitoring systems because they offer in-situ, real-time, non-intrusive processing capabilities. However, miniaturized platforms severely limit the energy of onboard batteries and shorten the lifespan of electronic systems. Ambient energy is an attractive alternative because the energy from light, heat, radio-frequency (RF) radiation, and motion can potentially be used to continuously replenish an exhaustible reservoir. Of these sources, solar light produces the highest power density, except wh

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2

Anton, Steven Robert. "Multifunctional Piezoelectric Energy Harvesting Concepts." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27388.

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Energy harvesting technology has the ability to create autonomous, self-powered electronic systems that do not rely on battery power for their operation. The term energy harvesting describes the process of converting ambient energy surrounding a system into useful electrical energy through the use of a specific material or transducer. A widely studied form of energy harvesting involves the conversion of mechanical vibration energy into electrical energy using piezoelectric materials, which exhibit electromechanical coupling between the electrical and mechanical domains. Typical piezoelectri

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3

Xiong, Haocheng. "Piezoelectric Energy Harvesting for Roadways." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51361.

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Energy harvesting technologies have drawn much attention as an alternative power source of roadway accessories in different scales. Piezoelectric energy harvesting consisting of PZT piezoceramic disks sealed in a protective package is developed in this work to harness the deformation energy of pavement induced by traveling vehicles and generate electrical energy. Six energy harvesters are fabricated and installed at the weigh station on I-81 at Troutville, VA to perform on-site evaluation. The electrical performance of the installed harvesters is evaluated by measuring the output voltage and

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4

Ersoy, Kurtulus. "Piezoelectric Energy Harvesting For Munitions Applications." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613589/index.pdf.

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In recent years, vibration-based energy harvesting technologies have gained great importance because of reduced power requirement of small electronic components. External power source and maintenance requirement can be minimized by employment of mechanical vibration energy harvesters. Power sources that harvest energy from the environment have the main advantages of high safety, long shell life and low cost compared to chemical batteries. Electromagnetic, electrostatic and piezoelectric transduction mechanisms are the three main energy harvesting methods. In this thesis, it is aimed to apply

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5

Alaei, Zohreh. "Power Enhancement in Piezoelectric Energy Harvesting." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188956.

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Piezoelectric energy harvesting has been around for almost a decade to generate power from the ambient vibrations. Although the generated power is very small, but there are several ways to increase and enhance the generated power. This project presents different methods of optimizing the output power by changing the structural configuration of the energy harvesters, selection of piezoelectric material and circuit interface of these harvesters. To understand the different steps of the enhancement, the process of energy conversion by piezoelectric material has been first looked at. Different gro

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6

Jalali, Nimra. "ZnO nanorods-based piezoelectric energy harvesters." Thesis, Queen Mary, University of London, 2015. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8948.

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Piezoelectric nanostructures of ZnO were employed for development of vibration energy harvesters. Columnar nanorod structures of ZnO, incorporated into various heterojunction-based device prototypes, were strained to generate voltage signals. The fabricated devices’ prototypes were based on different top electrodes such as: p-n junction-type Poly(3,4-ethylenedioxythiophene) Polystyrene sulfonate (PEDOT:PSS)/ZnO devices, metal-insulator-semiconductor type Poly(methyl methacrylate) (PMMA)/ZnO devices. Similarly, various bottom electrode materials based prototypes were also assembled: ZnO/indium

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7

Wong, You Liang Lionel. "Piezoelectric Ribbons for Stretchable Energy Harvesting." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/718.

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As we enter the age of the internet of things (IoT), more embedded devices are appearing in our everyday items, such as electrical appliances, watches, mobile phones, and even clothes. These are devices that are able to communicate with one another and collect sensing data about their environment. An emerging area of interest in this field is the wearable devices, such as smart devices for healthcare and wellness implantables. These devices require power and batteries will need to be constantly recharged, adding to the users’ inconvenience. Energy harvesters are devices that are able to harnes

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8

Mahmoudiandehkordi, Soroush. "Energy Harvesting With A THUNDER Piezoelectric." Thesis, Southern Illinois University at Edwardsville, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10243311.

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<p> Piezoelectric materials have a unique characterization which can absorb energy from the environment and convert it to electrical energy. In this conducted research energy harvesting of the THin layer UNimorph DrivER (THUNDER) were investigated. THUNDER is a curved PZT which bring considerable benefits in compare of flat PZT such as better vibration absorption capacity and higher energy recovery efficiency. Also one of the most important characteristics of THUNDER is its low resonance frequency. Because the maximum power a harvester can achieve is at its resonance frequency. So it has appli

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9

Erturk, Alper. "Electromechanical Modeling of Piezoelectric Energy Harvesters." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/29927.

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Vibration-based energy harvesting has been investigated by several researchers over the last decade. The ultimate goal in this research field is to power small electronic components (such as wireless sensors) by using the vibration energy available in their environment. Among the basic transduction mechanisms that can be used for vibration-to-electricity conversion, piezoelectric transduction has received the most attention in the literature. Piezoelectric materials are preferred in energy harvesting due to their large power densities and ease of application. Typically, piezoelectric energy ha

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10

Elliott, Alwyn David Thomas. "Power electronic interfaces for piezoelectric energy harvesters." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/39965.

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Motion-driven energy harvesters can replace batteries in low power wireless sensors, however selection of the optimal type of transducer for a given situation is difficult as the performance of the complete system must be taken into account in the optimisation. In this thesis, a complete piezoelectric energy harvester system model including a piezoelectric transducer, a power conditioning circuit, and a battery, is presented allowing for the first time a complete optimisation of such a system to be performed. Combined with previous work on modelling an electrostatic energy harvesting system, a

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11

Li, Yang. "Simple techniques for piezoelectric energy harvesting optimization." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0077/document.

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La récupération d'énergie par élément piézoélectrique est une technique prometteuse pour les futurs systèmes électroniques nomades autoalimentés. L'objet de ce travail est d’analyser des approches simples et agiles d’optimisation de la puissance produite par un générateur piézoélectrique. D'abord le problème de l’optimisation de l’impédance de charge d’un générateur piézoélectrique sismique est posé. Une analyse du schéma équivalent global de ce générateur a été menée sur la base du schéma de Mason. Il est démontré que la puissance extraite avec une charge complexe adaptée puisse être constant

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12

Ahmadi, Mehdi. "Energy Harvesting Wireless Piezoelectric Resonant Force Sensor." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc407829/.

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The piezoelectric energy harvester has become a new powering option for some low-power electronic devices such as MEMS (Micro Electrical Mechanical System) sensors. Piezoelectric materials can collect the ambient vibrations energy and convert it to electrical energy. This thesis is intended to demonstrate the behavior of a piezoelectric energy harvester system at elevated temperature from room temperature up to 82°C, and compares the system’s performance using different piezoelectric materials. The systems are structured with a Lead Magnesium Niobate-Lead Titanate (PMN-PT) single crystal patc

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13

Lumentut, Mikail F. "Mathematical dynamics of electromechanical piezoelectric energy harvesters." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/1352.

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This research investigates vibration energy harvesting by modelling several piezoelectric-based structures. The usage of piezoelectric transduction under input vibration environments can be profitable for obtaining electrical energy for powering smart wireless sensor devices for health condition monitoring of rotating machines, structures and defence communication technology. The piezoelectric transduction shows strong prospect in the application of power harvesting because it can be applied at the microelectromechanical system design level in compact configuration with high sensitivity with r

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14

DURACCIO, DONATELLA. "Piezoelectric composite films for energy harvesting devices." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2872343.

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15

Fabbri, Davide. "Electrically tunable piezoelectric bimorph cantilever for energy harvesting." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11164/.

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Con la presente tesi viene esaminato un metodo per modificare la frequenza di risonanza di trasduttori piezoelettrici mediante applicazione di carichi elettrici esterni. L'elaborato inizia con la presentazione dei cristalli utilizzati nel lavoro di tesi, concentrandosi sul processo di fabbricazione di un bimorph cantilever impiegato come convertitore elettromeccanico di energia, la cui frequenza di risonanza è modellizzata analiticamente mediante la legge di Newton e il modello di Euler-Bernoulli. Su tale struttura vengono condotte misure mediante shaker elettrodinamico e analizzatore d'im

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16

Wolf, Kai-Dietrich. "Electromechanical energy conversion in asymmetric piezoelectric bending actuators." [S.l. : s.n.], 2000. http://elib.tu-darmstadt.de/diss/000094/d.pdf.

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17

Mak, Kuok Hang. "Vibration modelling and analysis of piezoelectric energy harvesters." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12534/.

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The performance of piezoelectric cantilever beam energy harvesters subjected to base excitation is considered in this work. Based on the linear assumption, a theoretical model is developed to predict the mechanical and electrical responses of the harvester and in comparison to other theoretical models, more accurate mode shape functions are used for the structural part of the harvester. The model is validated against experimental measurements and parameter studies are carried out to investigate the maximum power output in different situations. In some applications, like powering tyre pressure

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18

Song, Hyun-Cheol. "Piezoelectric-based Multi-Scale Multi-Environment Energy Harvesting." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/87400.

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Energy harvesting is a technology for generating electrical power from ambient or wasted energy. It has been investigated extensively as a means of powering small electronic devices. The recent proliferation of devices with ultra-low power consumption - devices such as RF transmitters, sensors, and integrated chipsets - has created new opportunities for energy harvesters. There is a variety of ambient energies such as vibration, thermal, solar, stray current, etc. Depending on energy sources, different kinds of energy conversion mechanism should be employed. For energy harvesters to become pr

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19

Thompson, Kristen. "Power Optimization Configurations in Piezoelectric Energy Harvesting Systems." Youngstown State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1607878811381028.

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20

Qian, Feng. "Piezoelectric Energy Harvesting for Powering Wireless Monitoring Systems." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/99156.

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The urgent need for a clean and sustainable power supply for wireless sensor nodes and low-power electronics in various monitoring systems and the Internet of Things has led to an explosion of research in substitute energy technologies. Traditional batteries are still the most widely used power source for these applications currently but have been blamed for chemical pollution, high maintenance cost, bulky volume, and limited energy capacity. Ambient energy in different forms such as vibration, movement, heat, wind, and waves otherwise wasted can be converted into usable electricity using prop

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21

Abedini, Amin. "Piezoelectric Energy Harvesting via Frequency Up-conversion Technology." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/dissertations/1716.

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Ambient energy harvesting has attracted significant attention over the last years for applications such as wireless sensors, implantable devices, health monitoring systems, and wearable devices. The methods of vibration-to-electric energy conversion can be included in the following categories: electromagnetic, electrostatic, and piezoelectric. Among various techniques of vibration-based energy harvesting, piezoelectric transduction method has received the most attention due to the large power density of the piezoelectric material and its simple architectures. In contrast to electromagnetic ene

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22

Pinkston, Caroline Susan. "Investigation and characterization of a high energy piezoelectric pulse." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4297.

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Thesis (M.S.)--University of Missouri-Columbia, 2005.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (December 18, 2006) Includes bibliographical references.

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23

Honghao, Tang. "A Study on Interface Circuits for Piezoelectric Energy Harvesting." Thesis, Linköpings universitet, Elektroniska Kretsar och System, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-144497.

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A piezoelectric energy harvesting (PEH) system can harvest electrical energy from ambient vibration energy. In a PEH system, the interface rectifier circuit is critical because it converts AC from the output of piezoelectric harvester to DC that can power the load. Hence, improving the efficiency of the interface circuit can directly increase the efficiency of the entire PEH system; consequently, more power can be harvested. Commonly used interface circuits in PEH systems, such as full-bridge and voltage- doubler rectifiers,lead to relatively simple circuit implementations but they show seriou

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24

Bonsi, Adime. "Fatigue of piezoelectric beams used in vibration energy harvesting." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=92374.

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The goal of this thesis is to determine the fatigue life of piezoelectric energy harvesters. The harvester is a cantilever beam made from the piezoelectric ceramic lead zirconate titanate (PZT). Similar structures are used in micro electromechanical systems (MEMS) as actuators and energy harvesters to convert electrical energy to mechanical energy and vice versa. A platform was built to excite PZT cantilever beams in bending vibration, and a method was developed to detect the mechanical and electrical response of the beam, and correlate changes in these responses to the onset of damage.<br>Sub

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25

Patel, Rupesh. "Modelling analysis and optimisation of cantilever piezoelectric energy harvesters." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13246/.

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Over the last decade there has been a growing increase in research in the field of vibrational energy harvesting - devices which convert ambient vibrational energy into electrical energy. The major application area for such devices is as power sources for wireless sensors, thereby replacing currently used batteries which suffer from a finite lifespan and pose environmental issues during disposal. The vast majority of designs are cantilever beams comprising of piezoelectric layers having coverage identical to the substrate layer. It is evident from the literature that rudimentary work has been

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26

Nelson, Russell J. "Optimal design of piezoelectric materials for maximal energy harvesting." Thesis, Monterey, California: Naval Postgraduate School, 2015. http://hdl.handle.net/10945/45913.

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Approved for public release; distribution is unlimited<br>The military’s dependence on fossil fuels for electric power production in isolated settings is both logistically and monetarily expen-sive. Currently, the Department of Defense is actively seeking alternative methods to produce electricity, thus decreasing dependence on fossil fuels and increasing combat power.We believe piezoelectric generators have the ability to contribute to military applications of alternative electrical power generation in isolated and austere conditions. In this paper, we use three and six variable mathemat-ical

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27

Yoon, You C. (You Chang). "Design of test bench apparatus for piezoelectric energy harvesters." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/86267.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 48).<br>This thesis presents the design and analysis of an experimental test bench for the characterization of piezoelectric microelectromechanical system (MEMS) energy harvester being developed by the Micro & Nano Systems Laboratory research group at MIT. Piezoelectric MEMS energy harvesters are micro-devices that are able to harvest energy from their ambient vibrations using piezoelectric material property,

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28

Wang, Ya. "Simultaneous Energy Harvesting and Vibration Control via Piezoelectric Materials." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/26191.

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This work examines a novel concept and design of simultaneous energy harvesting and vibration control on the same host structure. The motivating application is a multifunctional composite sandwich wing spar for a small Unmanned Aerial Vehicle (UAV) with the goal of providing self-contained gust alleviation. The basic idea is that the wing itself is able to harvest energy from the ambient vibrations along with available sunlight during normal flight. If the wing experiences any strong wind gust, it will sense the increased vibration levels and provide vibration control to maintain its stability

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29

Agyemang, Duah Joseph Agyemang Duah. "A PIEZOELECTRIC POWERED BLUETOOTH LOW ENERGY TEMPERATURE SENSOR PLATFORM." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1533124081986125.

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30

Shaheen, Murtadha A. "POWER MAXIMIZATION FOR PYROELECTRIC, PIEZOELECTRIC, AND HYBRID ENERGY HARVESTING." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4462.

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The goal of this dissertation consists of improving the efficiency of energy harvesting using pyroelectric and piezoelectric materials in a system by the proper characterization of electrical parameters, widening frequency, and coupling of both effects with the appropriate parameters. A new simple stand-alone method of characterizing the impedance of a pyroelectric cell has been demonstrated. This method utilizes a Pyroelectric single pole low pass filter technique, PSLPF. Utilizing the properties of a PSLPF, where a known input voltage is applied and capacitance Cp and resistance Rp can be ca

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31

Shen, Dongna Kim Dong Joo. "Piezoelectric energy harvesting devices for low frequency vibration applications." Auburn, Ala., 2009. http://hdl.handle.net/10415/1603.

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32

Zhao, Sihong. "Energy harvesting from random vibrations of piezoelectric cantilevers and stacks." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49030.

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Electromechanical modeling efforts in the research field of vibration-based energy harvesting have been mostly focused on deterministic forms of vibrational input as in the typical case of harmonic excitation at resonance. However, ambient vibrational energy often has broader frequency content than a single harmonic, and in many cases it is entirely stochastic. As compared to the literature of harvesting deterministic forms of vibrational energy, few authors presented modeling approaches for energy harvesting from broadband random vibrations. These efforts have combined the input statistical i

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Triplett, Angela L. "Vibration-Based Energy Harvesting." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1226614650.

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34

Dhayal, Vandana Sultan Singh. "Exploring Simscape™ Modeling for Piezoelectric Sensor Based Energy Harvester." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc984261/.

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This work presents an investigation of a piezoelectric sensor based energy harvesting system, which collects energy from the surrounding environment. Increasing costs and scarcity of fossil fuels is a great concern today for supplying power to electronic devices. Furthermore, generating electricity by ordinary methods is a complicated process. Disposal of chemical batteries and cables is polluting the nature every day. Due to these reasons, research on energy harvesting from renewable resources has become mandatory in order to achieve improved methods and strategies of generating and storing e

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Li, Kaixiang. "Structural vibration damping with synchronized energy transfer between piezoelectric patches." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00735788.

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Advanced materials such as carbon fiber, composite materials et al. are more and more used in modern industry. They make the structures lighter and stiffer. However, they bring vibration problems. Researchers studied numerous methods to eliminate the undesirable vibrations. These treatments are expected to be a compact, light, intellectual and modular system. Recently, a nonlinear technique which is known as Synchronized Switch Damping (SSD) technique was proposed. These techniques synchronously switched when structure got to its displacement extremes that leading to a nonlinear voltage on the

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Du, Toit Noël Eduard. "Modeling and design of a MEMS piezoelectric vibration energy harvester." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32450.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2005.<br>Includes bibliographical references (p. 181-195).<br>The modeling and design of MEMS-scale piezoelectric-based vibration energy harvesters (MPVEH) are presented. The work is motivated by the need for pervasive and limitless power for wireless sensor nodes that have application in structural health monitoring, homeland security, and infrastructure monitoring. A review of prior milli- to micro-scale harvesters is provided. Common ambient low-level vibration sources are characterized experimental

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Sood, Rajendra K. (Rajendra Kumar) 1979. "Piezoelectric Micro Power Generator (PMPG) : a MEMS-based energy scavenger." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/18020.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.<br>Includes bibliographical references (p. 99-100).<br>As MEMS and smart material technologies begin to mature, their applications, such as medical implants and wireless communications are becoming more attractive. Traditionally, remote devices have used chemical batteries to supply their energy. However, batteries are no longer suitable for many of these remote applications due to their relatively large bulk and weight, limited lifetime and high cost. The commercially sponsored

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Cheng, Yukun. "Study on efficient piezoelectric energy harvesting with frequency self-tuning." ASME 2015 International Mechanical Engineering Congress and Exposition, 2015. http://hdl.handle.net/1993/31645.

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A frequency self-tuning energy harvesting methodology is proposed to achieve efficient energy harvesting. To simulate the self-tuning process, a theoretical model of the harvester made of an aluminum beam bonded with piezoelectric patches is developed for numerical simulation. The energy harvesting is realized by converting ambient vibration to electric charge through piezoelectric patches on the host beam. To accomplish the frequency self-tuning process, a control voltage is applied on a piezoelectric stack actuator to tune the natural frequency of the beam harvester matching the major excita

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Wong, Voon-Kean. "Development of a dynamic model for piezoelectric raindrop energy harvesting." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/44707/.

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Over the last decade, advancement of microelectronics has triggered a growing interest in ambient energy harvesting. Ambient energy can be found in various forms such as: thermoelectric, acoustic, solar, and mechanical vibrations. Most of the stated ambient energy sources have been thoroughly investigated. One of the relatively unexplored ambient energy sources is raindrop impact energy. Raindrop impact energy harvesting is achieved by converting the strain induced by an impinging raindrop on a piezoelectric beam into usable electrical energy. Most of the conducted research from the literature

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Cardoso, José Tiago Teixeira. "Nanoscaled Piezoelectric Energy Harvesters." Master's thesis, 2015. https://repositorio-aberto.up.pt/handle/10216/82377.

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Cardoso, José Tiago Teixeira. "Nanoscaled Piezoelectric Energy Harvesters." Dissertação, 2015. https://repositorio-aberto.up.pt/handle/10216/82377.

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Mondal, Debojyoti. "Energy Harvesting Using Piezoelectric Materials." Thesis, 2017. http://ethesis.nitrkl.ac.in/8888/1/2017_MT_DMondal.pdf.

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Harvesting Energy is a very interesting area of research in recent times. The depletion in the conventional non renewable energy sources have made researchers to look into new and alternate sources of energy. Walking is one the primary motion of human beings and with each step taken there is some amount of energy which is left behind in form of stray Vibrations. This mechanically wasted form of energy could be converted into electrical ones using piezoelectricity. This work takes a look into the possibility of harvesting such mechanical energy and converting them into the usable electrical for

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Hung, Sheng-Wei, and 洪聖瑋. "Synchronized Switch Harvesting Using Piezoelectric Oscillators for Piezoelectric Energy Harvesting System." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/u794m8.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>107<br>In order to replace the traditional battery, the concept of energy harvesting has been proposed and attracted widespread attention. Using the micro-piezoelectric transducer for extracting ambient energy is now a popular research topic. The piezoelectric energy harvesting system consists of a piezoelectric transducer, a load device, and interface circuits, which usually includes a rectifier and a DC/DC converter. In general, a full-bridge rectifier is used to convert AC source into DC voltage because it is easy to implement. However, the it has low power

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Elalfy, Ahmed Mohamed. "Energy Harvesting using Optimized Piezoelectric Microcantilevers." 2007. http://trace.tennessee.edu/utk_gradthes/280.

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In this thesis, the energy producing capabilities and efficiency of Piezoelectric materials for ambient energy harvesting from multi-layered micro-cantilevers are analyzed. The cantilevers are then optimized utilizing a homogenization approach involving the redistribution of materials in all regions throughout the three dimensional model to yield the greatest voltage output for a specified tip force under static loading; This would be analogous to having the greatest energy production. The design of the model using the Finite Element Analysis (FEA) software ABAQUS is used in conjunction with a

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Pielahn, Mathias. "Vibrational Energy Harvesting with Piezoelectric Cantilevers." 2014. http://hdl.handle.net/1993/23934.

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Due to decreasing power requirements for wireless networks and other microwatt devices, energy harvesting from ambient vibrations has become a realized power source. Piezoelectric cantilevers are a viable option as the transducer element for converting mechanical to electrical energy. Being able to accurately model piezoelectric cantilevers is important in designing efficient converters needed in the power management circuitry. In this thesis a method is outlined that enables the modeling of the physical behaviour of piezoelectric cantilevers with an equivalent circuit model comprised of RLC c

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Liu, Nai-Ren, and 劉乃仁. "A shear mode piezoelectric energy harvester." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/85812008437132659086.

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碩士<br>國立中興大學<br>精密工程學系所<br>98<br>A shear mode piezoelectric energy harvester for harnessing energy from flow-induced vibration is developed. It converts flow energy into electrical energy by piezoelectric conversion with oscillation of a piezoelectric beam. A finite element model is developed in order to estimate the generated voltage of the piezoelectric beam. Prototypes of the energy harvester are fabricated and tested. Experimental results show that an open circuit output voltage of 72mVpp are generated when the excitation pressure oscillates with an amplitude of 20.80 kPa and a frequenc

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Lin, Huang-Guan, and 黃冠霖. "Research on Piezoelectric Energy Harvesting Device." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/56704183087665152985.

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碩士<br>大葉大學<br>工具機產業碩士學位學程<br>103<br>Over the years, industrialized society surge in demand for energy and a limited supply of fossil fuels have become increasingly prominent, countries to develop various renewable energy sources, energy recovery technology become hot topics. Piezoelectric generator is such a technique, piezoelectric effect piezoelectric material mechanical vibrational energy into electrical energy, which will walk as human stampede, mechanical vibration, noise or vibration energy in the form of collected through energy conversion , rectifier, storage, power supply and many oth

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Gunawan, Hariyanto, and 魏福勝. "A Study of Piezoelectric Energy Harvesting." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/14245804941452445832.

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碩士<br>中原大學<br>機械工程研究所<br>97<br>A great deal of research has repeatedly demonstrated that piezoelectric energy harvesters by using piezoelectric direct effect hold the promise of providing an alternative power source. Ambient vibrations have been the focus as a source due to the amount of energy available in them. How to harvest the vibration energy and transfer into useful electricity and store into a battery is the primary investigation in this article. Also, efficiency of energy harvesting of a piezoelectric unimorph and mechanical to electrical conversion of a converter is studied. An overv

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Chen, Yunghan, and 陳永翰. "Piezoelectric Energy Harvesting and Storage System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/59808201648171924808.

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碩士<br>大葉大學<br>機械與自動化工程學系<br>100<br>Nowadays, due to the energy shortages, people begin to find new energy sources to replace the existing ones. The ways of collecting energy sources in the environment play an important role in human life where many kinds of vibration energy exist. This green energy will gradually replace the traditional energy such as fossil energy, etc. Piezoelectric materials, which have the function of electromechanical energy conversion, can be applied to converting vibration energy into electrical energy. In this study, we have proposed a piezoelectric energy harvester, w

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ELAHI, HASSAN. "Piezoelectric energy harvesting by aeroelastic means." Doctoral thesis, 2020. http://hdl.handle.net/11573/1364130.

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For the last few decades, piezoelectric (PZT) materials have been widely used in the field of micro/nano-electromechanical systems. One of the most important applications of the PZT material is energy harvesting by absorbing ambient energy from the operational conditions and converting it into electrical energy. This energy can be used to operate sensors and actuators. Moreover, it can be stored in batteries for later tasks. In this thesis, the harvester absorbs energy from the airflow, thanks fluid-structure interaction (FSI), and converts it into useful electrical energy. To analyze FSI, i

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