Academic literature on the topic 'Magnetostriction energy'
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Journal articles on the topic "Magnetostriction energy"
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Koyama, Akihiro, Masaki Fujita, Takehito Ikeuchi, and Muneyuki Imafuku. "Prediction of Magnetostrictive Properties of Fe-Ga Alloy Based on Internal Energy Model with Magnetomechanical Effect." Materials Science Forum 941 (December 2018): 875–78. http://dx.doi.org/10.4028/www.scientific.net/msf.941.875.
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Fe-Ga alloy is expected as energy harvest material having superior magnetostrictive properties. In this study, we compared angle dependence of amount of magnetostriction with ideal magnetostrictive model using cube-oriented single crystal Fe-18mol%Ga alloy. Magnetostriction in [100] of specimen was measured with changing the direction of statical magnetic field H by strain gauge. As a result, the measured magnetostriction could not fully explaind by traditional energy-based model of magnetostriction. We compared measurement result using strain gauge with calculation result using energy-based model. As a result, there was a large difference in maximum compressive strain value. We established modified energy-based model considering the deviation of magnetic domains so as to match the actual magnetostriction behavior.
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Ben, Tong, Yuqi Kong, Long Chen, Fangyuan Chen, and Xian Zhang. "Magnetostriction property modeling of silicon steel considering stress-induced and magnetocrystalline anisotropy." AIP Advances 13, no. 2 (2023): 025031. http://dx.doi.org/10.1063/9.0000421.
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This paper proposed an improved magnetostriction model for correlation of anisotropy in non-oriented (NO) silicon steel based on the free energy, which considers stress-induced and magnetocrystalline anisotropy. Firstly, the free energy model, which includes stress-induced anisotropy energy, the energy of magnetic field, and the anisotropic energy of magnetic crystals, is incorporated into the anhysteretic magnetization parameter M an. Then, to obtain the magnetic field and proposed model parameters related to stress-induced and magnetocrystalline anisotropy, the magnetostrictive strain loops at different magnetization directions of NO silicon steel are measured. Finally, based on the parameters obtained from experimental data of the proposed model, magnetostrictive strain loops under varying magnetization directions are simulated. This improved magnetostriction model can be applied to the calculation of the vector magnetostriction of the motor core.
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Dong, Pan Ting, Li Zhang, Meng Qi Liu, Tong Zhao, Liang Zou, and Qing Quan Li. "Silicon Steel Sheet Vibration Model Based on the Magnetostrictive Properties." Advanced Materials Research 955-959 (June 2014): 882–85. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.882.
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Magnetostriction of transformer core plays a dominated role in the vibration of transformer equipment. In order to simulation the magnetostrictive effect, a equivalent magnetostrictive force model is introduced in this paper. Elongation-based models are used to deduce the magnetostrive force. Elongation-based models employ experimental data from magnestrictive elongation to bulid the relation between magnestrictive strain and magnetic flux density, and can be used for harmonic analysis. Magnetostrictive force on single slicion sheet is deduced by strain energy density and energy conservation principle. The force is applied on the single silicon sheet model to analysis the deformation caused by magnetostriction.
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Yang, Zijing, Jiheng Li, Zhiguang Zhou, Jiaxin Gong, Xiaoqian Bao, and Xuexu Gao. "Recent Advances in Magnetostrictive Tb-Dy-Fe Alloys." Metals 12, no. 2 (2022): 341. http://dx.doi.org/10.3390/met12020341.
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As giant magnetostrictive materials with low magnetocrystalline anisotropy, Tb-Dy-Fe alloys are widely used in transducers, actuators and sensors due to the effective conversion between magnetic energy and mechanical energy (or acoustic energy). However, the intrinsic brittleness of intermetallic compounds leads to their poor machinability and makes them prone to fracture, which limits their practical applications. Recently, the addition of a fourth element to Tb-Dy-Fe alloys, such as Ho, Pr, Co, Nb, Cu and Ti, has been studied to improve their magnetostrictive and mechanical properties. This review starts with a brief introduction to the characteristics of Tb-Dy-Fe alloys and then focuses on the research progress in recent years. First, studies on the crystal growth mechanism in directional solidification, process improvement by introducing a strong magnetic field and the effects of substitute elements are described. Then, meaningful progress in mechanical properties, composite materials, the structural origin of magnetostriction based on ferromagnetic MPB theory and sensor applications are summarized. Furthermore, sintered composite materials based on the reconstruction of the grain boundary phase also provide new ideas for the development of magnetostrictive materials with excellent comprehensive properties, including high magnetostriction, high mechanical properties, high corrosion resistance and high resistivity. Finally, future prospects are presented. This review will be helpful for the design of novel magnetostrictive Tb-Dy-Fe alloys, the improvement of magnetostrictive and mechanical properties and the understanding of magnetostriction mechanisms.
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Zhang, Shuo, Lian-Chun Long, Jing-Yi Liu, and Yang Yang. "Effect of defects on magnetostriction and magnetic moment evolution of iron thin films." Acta Physica Sinica 71, no. 1 (2022): 017502. http://dx.doi.org/10.7498/aps.71.20211177.
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Magnetostrictive materials have broad application prospects in sensing, control, energy conversion, and information conversion. The improving of the performances and applications of such materials has become a research hotspot, but defects will inevitably appear in the preparation and use of materials. In this study, the magnetostrictive structure model of iron elemental material with no defect or hole defect or crack defect is established by the molecular dynamics method. The influences of different defects on the magnetostrictive behavior of iron thin films are analyzed, and the mechanism of the influence of defects on the magnetostrictive behavior is depicted from the perspective of atomic magnetic moment. The results show that the films with 60 × 2 × 1 defects in the center are the easiest to reach saturation magnetostriction, and the magnetostriction is the least after reaching saturation, with respect to the films without defects. The films with 10 × 10 × 1 and 2 × 60 × 1 defects in the center require a larger magnetic field to approach to saturation, and the magnetostriction of the film with 2 × 60 × 1 defects in the center reaches a maximum value after saturation. This is because the defects will affect the magnetic moment of the surrounding atoms and make them deflect to the direction parallel to the defects, thus affecting the magnetostriction of the iron thin film. Among them, the hole defects have less influence on the magnetostriction, while the crack defects have stronger influence on the magnetostriction. The direction of the crack also has an effect on the magnetostriction of Fe thin film. When the crack is parallel to the direction of magnetization, the maximum magnetostriction of the film in the direction of magnetization from the initial state to the saturation of magnetization will decrease. When the crack is perpendicular to the direction of magnetization, the maximum magnetostriction of the film in the direction of magnetization from the initial state to the saturation of magnetization will increase. These results suggest that the defects affect the magnetostriction of the model as a whole during magnetization by affecting the initial magnetic moment orientation of the surrounding atoms.
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Lee, Heung-Shik. "Effect of Graphene Thin Layer on a Static and Dynamic Magnetostrictive Behavior in TbDyFe Multi-Layered Film for Micro Energy Devices." Journal of Nanoscience and Nanotechnology 20, no. 11 (2020): 6776–81. http://dx.doi.org/10.1166/jnn.2020.18776.
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Magnetos-mechanical behaviors of TbDyFe/Graphene/TbDyFe film were compared with a tri-layered TbDyFe film to verify the effects of a graphene thin layer on the improvement of magnetic-mechanical performance, as well as decrease of dynamic response time under the low magnetic field. Both of the Heisenberg model and Landau-Lifshitz-Gilbert equation were used to calculate the magnetic domain motion. Time consumptions were simulated to determine a uniformly magnetized state in Graphene and TbDyFe layers. To ensure the magnetostrictive characteristics, the magnetic moment and the magnetostriction were measured using a fabricated magnetostrictive actuator. Compare to the three-layer TbDyFe films, TbDyFe/Graphene/TbDyFe showed a higher magnetostrictive behavior in response to low coercive forces in the range of 0 to 10 kA/m, even with the addition of low magnetic fields. The dynamic magnetostriction response time was faster than the tri-layered TbDyFe film by approximately 24 millisecond.
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Filippov, Dmitry, Ying Liu, Peng Zhou, et al. "Theory of Magnetoelectric Effect for Three-Layer Piezo-Magnetostrictive Asymmetric Composites." Journal of Composites Science 6, no. 11 (2022): 346. http://dx.doi.org/10.3390/jcs6110346.
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Here, we discuss a model for the quasi-static magnetoelectric (ME) interaction in three-layer composites consisting of a single piezoelectric (PE) layer and two magnetostrictive (MS) layers with positive and negative magnetostriction. Two types of layer arrangements are considered: Type 1: a sandwich structure with the PE layer between the two MS layers and Type 2: the two MS layers form the adjacent layers. Expressions for the ME response are obtained using the system of equations of elasto- and electrostatics for the PE and MS phases. The contributions from longitudinal and bending vibrations to the net ME response are considered. The theory is applied for trilayers consisting of lead zirconate titanate (PZT), nickel for negative magnetostriction, and Metglas for positive magnetostriction. Estimates of the dependence of the strength of the ME response on the thickness of the three layers are provided. It is shown that the asymmetric three-layer structures of both types lead to an increase in the strength of ME interactions by almost an order of magnitude compared to a two-layer piezoelectric-magnetostrictive structure. The model predicts a much stronger ME response in Type 2 structures than in Type 1. The theory discussed here is of importance for designing composites for applications such as magnetic field sensors, gyrators, and energy harvesters.
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Faltas, Mina, Jamin R. Pillars, and Ihab Elkady. "Digital Communication through Solids Using Magnetostriction." ECS Meeting Abstracts MA2023-01, no. 52 (2023): 2626. http://dx.doi.org/10.1149/ma2023-01522626mtgabs.
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Digital communication through solid materials such as metals, ceramics, organic solids, or semiconductors has many applications. Only communication through metals has been attempted via ultrasonic waves. However, its performance is significantly hindered by echo interference. A way to enable communication through these solids is by the exploitation of magnetostriction. Magnetostriction is a property where a magnetic material changes its shape during the process of magnetization, essentially converting magnetic energy into kinetic energy. The kinetic energy produced by the magnetic material can then be taken through the solid media through which communication is intended to occur. The kinetic signal on the other side of the solid media could be converted to whatever type of energy is suitable for the application. This energy transduction channel, using magnetic energy and kinetic energy, can optimally be achieved through a soft magnetic material with high magnetostriction. A nickel-iron-cobalt based alloy was used to develop a material with a saturation magnetostriction over 200ppm, that can be electrodeposited out of an acidic aqueous chemistry. Initial high intrinsic stress in the deposited alloy was controlled with additives and altering the complexing, enabling consistent deposits of over a millimeter in thickness. The electrodeposited material’s performance is characterized and correlated to material properties such as alloy composition, microstructure, grain size, coercivity, magnetic saturation, Young’s Modulus, etc. The characterization methods used to analyze the magnetostrictive material and the effect of modulating plating parameters to control material properties will be presented. Additionally, the effect of annealing the material in an inert environment at varying temperatures and dwell times will be examined. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of the U.S. Department of Energy or the United States Government. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525
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Bjurström, Johan, Cristina Rusu, and Christer Johansson. "Combining Magnetostriction with Variable Reluctance for Energy Harvesting at Low Frequency Vibrations." Applied Sciences 14, no. 19 (2024): 9070. http://dx.doi.org/10.3390/app14199070.
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In this paper, we explore the benefits of using a magnetostrictive component in a variable reluctance energy harvester. The intrinsic magnetic field bias and the possibility to utilize magnetic force to achieve pre-stress leads to a synergetic combination between this type of energy harvester and magnetostriction. The proposed energy harvester system, to evaluate the concept, consists of a magnetostrictive cantilever beam with a cubic magnet as proof mass. Galfenol, Fe81.6Ga18.4, is used to implement magnetostriction. Variable reluctance is achieved by fixing the beam parallel to an iron core, with some margin to create an air gap between the tip magnet and core. The mechanical forces of the beam and the magnetic forces lead to a displaced equilibrium position of the beam and thus a pre-stress. Two configurations of the energy harvester were evaluated and compared. The initial configuration uses a simple beam of aluminum substrate and a layer of galfenol with an additional magnet fixing the beam to the core. The modified design reduces the magnetic field bias in the galfenol by replacing approximately half of the length of galfenol with aluminum and adds a layer of soft magnetic material above the galfenol to further reduce the magnetic field bias. The initial system was found to magnetically saturate the galfenol at equilibrium. This provided the opportunity to compare two equivalent systems, with and without a significant magnetostrictive effect on the output voltage. The resonance frequency tuning capability, from modifying the initial distance of the air gap, is shown to be maintained for the modified configuration (140 Hz/mm), while achieving RMS open-circuit coil voltages larger by a factor of two (2.4 V compared to 1.1 V). For a theoretically optimal load, the RMS power was simulated to be 5.1 mW. Given the size of the energy harvester (18.5 cm3) and the excitation acceleration (0.5 g), this results in a performance metric of 1.1 mW/cm3g2.
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Yan, Xiaoli, Xia Dong, Guozheng Han, Xiaodong Yu, and Fengying Ma. "Research on the Magnetostrictive Characteristics of Transformers under DC Bias." Energies 16, no. 11 (2023): 4457. http://dx.doi.org/10.3390/en16114457.
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Direct current (DC) bias leads to increased vibration and noise in transformers. One of the main causes is the magnetostrictive effect of the transformer core. To address this phenomenon of magnetostriction, firstly, a transmission line model (TLM) of a single-phase transformer under DC bias is developed using transmission line theory and Jiles–Atherton (J–A) ferromagnetic hysteresis theory, taking into account the winding copper loss, core eddy current loss, and leakage effect. Secondly, the time-domain simulation of the single-phase transformer based on the Newton–Raphson iterative method is carried out, and the magnetostriction characteristics of the transformer under different DC and its variation law are analyzed. Finally, the results show that the DC bias results in magnetostrictive distortion and vibration acceleration curve distortion, the left and right wings of the magnetostrictive butterfly curve are no longer symmetrical, the slope of the vibration acceleration image increases significantly, and the degree of distortion is positively correlated with the magnitude of the DC. In addition, the peak values of the magnetostrictive deformation and vibration acceleration become larger under DC bias, leading to an increase in the vibration and noise of the transformer. The research object of this paper is the single-phase transformer, and the research method can also be applied to the study of three-phase transformers.
Dissertations / Theses on the topic "Magnetostriction energy"
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Issindou, Valentin. "Matériaux magnétostrictifs de nouvelle génération pour l’énergie." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT083/document.
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Ces dernières années, les performances des matériaux multiferroïques ont beaucoup progressé avec les composites à deux phases : magnetostrictive et piézoélectrique. Les composites utilisent le couplage entre le magnétisme et la piézoélectricité par le biais de la magnétostriction. On obtient ainsi le contrôle de l’aimantation par le champ électrique électrique et à l’inverse celui de la polarisation électrique par un champ magnétique (ce qui nous intéresse ici). Cela pousse l’électronique vers des solutions plus vertueuses pour l’environnement avec une baisse de la consommation électrique des circuits (les commandes en courant sont remplacées par des commandes en tension) et le remplacement des piles d’alimentation, qui doivent être changées périodiquement, par des systèmes de récupération d’énergie pérenne. La récupération d’énergie est très présente avec l’Internet des Objets (IoT). Malgré leur performance, ces composites restent perfectibles, notamment au niveau de la phase magnetostrictive. Son optimisation est indispensable. Le matériau courant est le Terfenol-D à cause de sa magnétostriction géante, dans sa forme massive et monocristalline. Ce matériau historique demeure rare, cher, fragile et son procédé de tirage n’est pas adapté à la fabrication de dispositifs miniatures. Ce travail a donc porté sur l’étude comparative des voies de fabrication de disques miniatures de Terfenol-D pour la réalisation de récupérateurs d’énergie. Une étude de fond a été menée sur des séries de disques découpés dans des lingots d’alliages commerciaux (monocristallins et polycristallins). Ensuite, nous sommes tournés vers la méthode du frittage isotrope de poudre avec très peu de recul sur ce matériau. Le frittage conventionnel a conduit aux premiers disques fonctionnels sans découpe mais manquant de densité et de tenue mécanique. Ces défauts ont ensuite été corrigés grâce à la technique de SPS (Spark Plasma Sintering) mais la reproductibilité dans le temps reste à améliorer. Les disques de Terfenol-D (découpés et fabriqués) ont été assemblés avec la phase piézoélectrique (PZT commercial). Des caractérisations électriques par la méthode sans contact ont validé leur aptitude à récupérer de l’énergie, en proportion moindre quand on le compare au Terfenol-D monocristallin comme attendu, mais en quantité suffisante pour les applications ciblées. Enfin, une solution alternative a été explorée avec l’alliage magnétique à mémoire de forme NiMnGa offrant de très grandes déformations. Une perspective vers un bouton poussoir autonome sans fil est présentée en toute fin<br>In recent years, performances of multiferroïc materials have considerably improved with two-phase composites: magnetostrictive and piezoelectric. These composites take advantage of the coupling between magnetism and piezoelectricity through magnetostriction. Thus they allow control of magnetization with electrical voltage, and conversely, to get an electrical polarization depending on the magnetic field (our focus in this case). This drives electronics towards more environmental friendly solutions, namely with lower circuit power consumption (current controls are replaced by voltage controls) and the replacement of batteries, which must be periodically changed, by sustainable energy harvesting systems. Energy harvesting solutions are popular with the Internet of Things (IoT). Despite their performance, these multiferroïc composites remain perfectible, especially regarding the magnetostrictive phase. Its optimization is essential. The common material is Terfenol-D because of its giant magnetostriction, used in its massive and monocrystalline form. This material remains rare, expensive, fragile and its growing method is not adapted to the manufacturing of miniature devices. This work focuses on a comparative study of Terfenol-D miniature disk manufacturing pathways for the production of energy harvesters. A benchmark study was carried out on a series of disks cut in commercial alloy ingots (monocrystalline and polycrystalline). Next, the isotropic powder sintering method was investigated with very little background on this material. Conventional sintering led to the first functional disks needing no ulterior machining but with low density and mechanical strength. These defects were then corrected using the SPS technique (Spark Plasma Sintering) but the reproducibility over time has yet to be improved. The Terfenol-D disks (both cut and manufactured) were assembled with the piezoelectric phase (commercial PZT). Electrical characterizations using a contactless method have validated their potential to harvest energy, in lesser amounts than monocrystalline Terfenol-D as expected, but in a large enough quantity regarding most of applications. Finally, an alternative solution has been explored with NiMnGa shape magnetic alloys offering very large deformations. A perspective to a wireless autonomous push button prototype is presented at the very end
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Marin, Anthony Christopher. "Mechanical Energy Harvesting for Powering Distributed Sensors and Recharging Storage Systems." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/22037.
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Vibration energy harvesting has been widely investigated by academia and industry in the past decade with focus on developing distributed power sources. One of the prime goals of energy harvesters is to provide power to wireless sensors allowing for the placement of these sensors in the remote and inaccessible areas where battery is not an option. Electromechanical modeling approaches have been developed for enhancing the mechanical to electrical conversion efficiencies utilizing electromagnetic, piezoelectric, and magnetostrictive mechanisms. Models based upon the constitutive equations for these three conversion mechanisms, supported by extensive experimental results available in literature, suggest that power requirement through energy harvesters can be met only when the total volume is in the range of 1-100 cm3. There exists a critical volume of 0.5 cm3 at which above which the electromagnetic mechanism exhibits higher power density as compared to the other mechanisms. Therefore, in this thesis electromagnetic energy conversion was adopted to develop high power energy harvesters. We also present a novel vibration energy harvesting method which rivals the power density and bandwidth of the traditional methods. The overarching theme throughout the design process was selecting the structure and fabrication methodology that facilitates the transition of the technology. The experimental models were characterized at accelerations and frequencies typically found in the environmental vibration sources. <br />The thesis provides in-depth the design, modeling, and characterization of a vibration energy harvester which creates relative motion differently than the conventional harvesters. Conventional designs rely on amplifying the original source displacement operating at the resonance condition. In the harvester design proposed in this thesis, the relative motion is created by cancelling the vibration at one location and transferring the source vibration directly to another location by combining a vibration isolator with a vibration absorber. In this novel configuration, termed as Direct Vibration Harvester (DVH), the energy is harvested directly from the vibrating source mass rather than a vibrating seismic mass attached to the source increasing the harvesting bandwidth and power density. <br />Four bar magnet and magnetic levitation architectures were modified and modeled to reach closer to the theoretical maximum power densities. Extensive FEM was utilized to understand the performance limitations of the existing structures and the results from this analysis paved the pathway towards the development of the DVH. �A comparative analysis of the performance of the DVH with the traditional harvesting methods in terms of normalized power output and bandwidth was conducted. Performance improvements of DVH required development of the high efficiency rotational generators as linear to rotational conversion occurs in the DVH. The optimized rotational generator was modeled and all the predicted performance metrics were validated through experiments. The generator was applied towards the fabrication of DVH and also in a micro windmill. The power density of the micro windmill was found to be better than all the other results reported in literature. Extensive fluid and structural modeling was conducted to tailor the performance of the micro windmill in the desired wind speed range.<br />Combined, this thesis provides significant advancement on many fronts. It pushes the magnetic levitation and four-bar mechanism harvester systems to their theoretical limits. It demonstrates a novel direct vibration harvester that has the possibility of surpassing the power density and bandwidth of all the known vibration harvester with large magnitude of output power. It provides a design process for an efficient small scale electromagnetic generator that can form for the backbone of many rotational and linear harvesters. This generator was used to develop the world\'s highest power density micro windmill in the small wind speed range.<br /><br>Ph. D.
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Martone, Anthony M. Martone. "Development of Iron-Rich (Fe1-x-yNixCoy)88Zr7B4Cu1 Nanocrystalline Magnetic Materials to Minimize Magnetostriction for High Current Inductor Cores." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1499336427913261.
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Lahyaoui, Otmane. "Contribution to the study of magnetostrictive energy conversion : from material to device." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2472.
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Dans cette ère du tout électrique, la demande en technologie électrique est en nette augmentation dans plusieurs secteurs (automobile, ferroviaire et aéronautique). Malheureusement, le bruit et les vibrations d’origine magnétiques provenant de ces technologies restent une problématique préoccupante dans ces moyens de transports, perturbant ainsi le confort des passagers. Sachant que le fonctionnement de ces dispositifs électriques comme les moteurs, les générateurs, les transformateurs repose en grande partie sur les matériaux ferromagnétiques, les principales sources d’émission acoustiques sont la magnétostriction et les forces magnétostatiques. Les travaux de thèse discutés dans ce manuscrit visent à améliorer les connaissances actuelles sur les propriétés magnétiques et magnétostrictives des matériaux ferromagnétiques (NO Fe-3%Si) dans une perspective de compréhension et de maitrise de leur comportement sous différentes sollicitations (contrainte mécanique, effet des fréquences d’excitation. . .). L’étude présentée offre une approche complète d’investigation partant du matériau jusqu’au dispositif électrique. Un premier volet expérimental présente les caractérisations magnétiques et magnéto-élastiques effectuées sur des tôles magnétiques et sur une structure stratifiée. S’ajoute à cela, une étude sur la résonance mécanique induite par la magnétostriction dans une structure stratifiée ressemblant à un transformateur.Un deuxième volet traite de la modélisation du comportement magnétoélastique de la magnétostriction et de son intégration dans un outil basé sur la méthode des éléments finis pour permettre de prédire la magnétostriction sur une structure plus complexe qu’une simple tôle. Enfin, une étude impliquant l’interaction de la magnétostriction avec les forces de magnétiques est décrite avec une comparaison des résultats de simulation avec une méthode analytique et avec des mesures expérimentales<br>In this era of all-electric, the demand for electrical technology is clearly increasing in several sectors (automotive, rail and aeronautics). Unfortunately, magnetic noise and vibrations originating from these technologies remain a worrying issue in these means of transport, thus disrupting passenger comfort. Knowing that the operation of these electrical devices such as motors, generators and transformers relies largely on ferromagnetic materials, the main noise sources are magnetostriction and magnetic forces. The thesis works discussed in this manuscript aim to improve the current knowledge on the magnetic and magnetostrictive properties of ferromagnetic materials (NO Fe-3% Si) in a perspective of understanding and control of their behavior under different solicitations (mechanical stress, frequencies ...). The presented study offers a complete investigation approach from the material to the electrical device. A first experimental part presents the magnetic and magneto-elastic characterizations carried out on magnetic sheets and on a laminated structure. A study on the magnetic resonance induced by the magnetostriction including on an experimental modal analysis is presented as well. A second part deals with the modeling of the magneto-elastic behavior of magnetostriction and its integration into a finite element tool to predict the impact of the magnetostriction on a more complex structure than simple electrical sheet. Finally, a study of a possible interaction of magnetostriction with magnetic forcesis described with a comparison of simulation results with an analytical method and experimental measurements
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Šumpelová, Jana. "Magnetostrikční vibrační generátor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318153.
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This thesis deals with the idea of energy harvesting from mechanical vibration. It describes the magnetostrictive principle as a possibility to obtain an electrical energy. It is about a generator made of a beam with Terfenol-D material and a coil. The model of this device is created in Matlab/Simulink and FEMM application. For various values of measured vibration, these methods are then compared. In FEMM, you can improve energy gain by modeling of various environmental conditions and with using of another materials (e.g. by adding of permanent magnets). The outcome of the this thesis expresses the ability to harvest the energy with designed magnetostrictive generator compared to the already created models of the piezoelectric and electromagnetic generator. Based on these results, it is possible to determine which generator is more suitable for particular application.
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Staley, Mark Elliott. "Development of a prototype magnetostrictive energy harvesting device." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/3065.
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Thesis (M.S.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Germer, M., U. Marschner, and A. B. Flatau. "Design and experimental verification of an improved magnetostrictive energy harvester." SPIE, 2017. https://tud.qucosa.de/id/qucosa%3A35134.
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This paper summarizes and extends the modeling state of the art of magnetostrictive energy harvesters with a focus on the pick-up coil design. The harvester is a one-sided clamped galfenol unimorph loaded with two brass pieces each containing a permanent magnet to create a biased magnetic field. Measurements on different pick-up coils were conducted and compared with results from an analytic model. Resistance, mass and inductance were formulated and proved by measurements. Both the length for a constant number of turns and the number of turns for a constant coil length were also modeled and varied. The results confirm that the output voltage depends on the coil length for a constant number of turns and is higher for smaller coils. In contrast to a uniform magnetic field, the maximal output voltage is gained if the coil is placed not directly at but near the fixation. Two effects explain this behavior: Due to the permanent magnet next to the fixation, the magnetic force is higher and orientates the magnetic domains stronger. The clamping locally increases the stress and forces the magnetic domains to orientate, too. For that reason the material is stiffer and therefore the strain smaller. The tradeoff between a higher induced voltage in the coil and an increasing inductance and resistance for every additional turn are presented together with an experimental validation of the models. Based on the results guidelines are given to design an optimal coil which maximizes the output power for a given unimorph.
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Vidal, João Vasco Silvestre. "Magnetoelectric effect in composites based on single crystalline piezoelectrics." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/18005.
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Doutoramento em Engenharia Física<br>Este trabalho expõe um estudo teórico e experimental das propriedades anisotrópicas magnetoelétricas (ME) em diferentes compósitos contendo monocristais piezoelétricos (PE), maioritariamente sem chumbo na sua composição, com vista a diversas aplicações multifuncionais. Uma descrição linear do efeito ME em termos de campos elétricos, magnéticos e elásticos e constantes materiais é apresentada. Um modelo fenomenológico quasi-estático é usado para ilustrar a relação entre as constantes materiais, sua anisotropia e os coeficientes MEs transversais de tensão e carga. Subsequentemente, este modelo é empregue para estimar o máximo coeficiente ME direto de tensão expectável numa série de compósitos tri-camadas de Metglas/Piezocristal/Metglas em função da orientação do cristal PE. Demonstra-se assim como os efeitos MEs são fortemente dependentes da orientação cristalina, o que suporta a possibilidade de se gerarem coeficientes MEs de tensão elevados em compósitos contendo monocristais PEs sem chumbo como o niobato de lítio (LiNbO3; LNO), tantalato de lítio (LiTaO3), ortofosfato de gálio (GaPO4; GPO), quartzo (SiO2), langatato (La3Ga5.5Ta0.5O14) e langasite (La3Ga5SiO14) através da otimização da orientação cristalina.
Uma técnica experimental dinâmica de lock-in para a medição da impedância e efeito ME direto é exposta. O formalismo descritivo desta técnica, assim como um arranjo experimental desenvolvido para o efeito são apresentados. O esquema e características deste, assim como diferentes formas de reduzir o ruído e a indesejável indução mútua são exploradas.
Um estudo comparativo do efeito ME direto em compósitos tri-camadas de Metglas e monocristais de LNO e PMN-PT conectados de forma simples é exposto. Embora o PMN-PT possua piezocoeficientes de carga muito superiores aos do LNO, o coeficiente ME direto de tensão demonstrou-se comparável entre ambos os compósitos devido a uma muito menor permitividade dielétrica do LNO. Cálculos teóricos indicam aínda que as propriedades MEs poderão ser significativamente melhoradas (até 500 V/(cm.Oe)) através da otimização do ângulo de corte do LNO, espessura relativa entre camadas ferroelétrica/ferromagnética e uma melhor colagem entre o Metglas e o LNO. Vantagens da utilização do material ferroelétrico LNO em compósitos MEs são discutidas.
Num estudo subsequente, as propriedades dinâmicas anisotrópicas de impedância e MEs em compósitos tri-camadas de Metglas e monocristais PEs sem chumbo de LNO e GPO são exploradas. Medições foram realizadas em função do corte de cristal, magnitude e orientação do campo magnético de polarização e frequência do campo de modulação. Coeficientes MEs altamente intensos em certos modos de ressonância são explorados, e a sua relação com as propriedades materiais dos cristais e geometria dos compósitos é investigada. Um coeficiente ME de até 249 V/(cm.Oe) foi aqui observado num compósito com um cristal de LNO com corte 41ºY a 323.1 kHz. Mostramos assim
que compósitos multicamadas contendo cristais sem chumbo de LNO e GPO podem exibir efeitos MEs anisotrópicos relativamente elevados. Demonstramos também que o controlo da orientação dos cristais PEs pode em princípio ser usado na obtenção de propriedades MEs anisotrópicas desejáveis para qualquer aplicação. Características únicas como elevada estabilidade química, piezoeletricidade linear e robusteza térmica abrem verdadeiras perspetivas para a utilização de compósitos baseados no LNO e GPO em diversas aplicações.
Eventualmente, compósitos bi-camadas contendo lâminas PEs com bidomínios de LNO com corte 127ºY foram estudados tanto teoricamente como experimentalmente. Estas lâminas de LNO possuem uma estrutura de bidomínios com vetores de polarização espontânea opostos ao longo da direção da sua espessura (i.e. uma estrutura de macrodomínios ferroelétricos “head-to-head” ou “tail-to-tail”) Medições de impedância, efeito ME e densidade de ruido magnético equivalente foram realizadas nos compósitos operando sob condições quasi-estáticas e de ressonância. Coeficientes MEs de até 578 V/(cm.Oe) foram obtidos a ca. 30 kHz sob ressonâncias de dobramento usando cristais PEs com 0.5 mm de espessura. Medições de densidade de ruído magnético equivalente demosntraram valores de até 153 pT/Hz1/2 a 1 kHz (modo quasi-estático) e 524 fT/Hz1/2 sob condições de ressonância. É de esperar que uma otimização adicional das técnicas de fabrico, geometria dos compósitos e circuitos de detenção possa permitir reduzir estes valores até pelo menos 10 pT/Hz1/2 e 250 fT/Hz1/2, respetivamente, e a frequência de ressonância em pelo menos duas ordens de grandeza. Estes sistemas poderão assim no futuro ser usados em sensores vetoriais de campo magnético simples e sensíveis, passivos e estáveis e operáveis a elevadas temperaturas.<br>This work presents a theoretical and experimental study of the anisotropic magnetoelectric (ME) properties of differently structured composites featuring piezoelectric (PE) single-crystals, mainly lead-free, for diverse multifunctional applications. A linear description of the ME effects in terms of electric, magnetic and elastic fields and material constants is offered. An averaging quasi-static phenomenological model is used to illustrate the relation between the material constants, their anisotropy and the transversal direct ME voltage and charge coefficients. Subsequently, the aforementioned model is employed in the calculation of the maximum expected direct ME voltage coefficient for a series of tri-layered Metglas/Piezocrystal/Metglas composites as a function of the PE crystal orientation. The ME effects are shown to be strongly dependent on the crystal orientation, which supports the possibility of inducing large ME voltage coefficients in composites comprising lead-free PE single crystals such as lithium niobate (LiNbO3; LNO), lithium tantalate LiTaO3, gallium phosphate (GaPO4; GPO), quartz (SiO2), langatate (La3Ga5.5Ta0.5O14) and langasite (La3Ga5SiO14) through the optimization of the crystal orientation.
An experimental dynamic lock-in technique for the measurement of the impedance and direct ME effect is presented. The formalism describing this technique and an implemented custom-made setup are introduced. The scheme and characteristics of the latter as well as ways to reduce the noise and the undesirable mutual induction are explored.
A comparative study of the direct ME effect in simply bonded tri-layered laminates of Metglas and LNO and PMN-PT crystals is exposed. Though PMN-PT has much larger charge piezocoefficients than LNO, the direct magnetoelectric voltage coefficient is found to be comparable in both trilayers due to the much lower dielectric permittivity of LNO. Calculations show that the ME properties can be significantly improved (up to 500 V/(cm·Oe)) via an optimization of the cut angle of LNO, relative thickness ratio of the ferroelectric/ferromagnetic layers and a better bonding between Metglas and LNO. Advantages of using the LNO ferroelectric in ME composites are discussed.
In a subsequent study, the dynamic impedance and ME anisotropic properties of tri-layered composites of Metglas and single-crystalline lead-free PE of LNO and GPO are explored. Measurements have been performed as a function of the crystal-cut, magnitude and orientation of the magnetic bias field and frequency of the modulated field. Greatly enhanced ME coefficients in certain resonance modes are explored, and their relation to the material properties of the crystals and the geometry of the composites is investigated. The largest ME coefficient of up to 249 V/(cm·Oe) was observed for a composite with a 41ºY-cut LNO crystal at 323.1 kHz. We thus show that multilayers comprising lead-free LNO and GPO crystals can exhibit relatively large anisotropic ME effects. We also demonstrate that the control of the PE crystal’s
orientation can in principle be used to obtain almost any desired quasi-static and resonant anisotropic ME properties for any given application. Such unique features as chemical stability, linear piezoelectricity and thermal robustness open up a real perspective of using lead-free LNO and GPO based ME tri-layers in various applications.
Eventually, bi-layered composites comprising PE bidomain plates of 127ºY-cut LNO were studied both theoretically and experimentally. The LNO plates possessed an engineered bidomain structure with opposite spontaneous polarization vectors along the thickness direction (i.e. a “head-to-head” or “tail-to-tail” ferroelectric macrodomain structure). Impedance, ME effect and equivalent magnetic noise density measurements have been performed on the composites operating under quasi-static and resonant conditions. ME coefficients of up to 578 V/(cm·Oe) were obtained at ca. 30 kHz at the bending resonance using 0.5 mm thick piezoelectric crystals. Equivalent magnetic noise density measurements yielded values down to 153 pT/Hz1/2 at 1 kHz (quasi-static mode) and 524 fT/Hz1/2 under resonant conditions. A further optimization of the fabrication techniques, laminate geometry and detection circuit is expected to allow reducing these values down to at least 10 pT/Hz1/2 and 250 fT/Hz1/2, respectively, and the resonance frequency by at least two orders of magnitude. Such systems may in future thus find use in simple and sensitive, passive and stable, low-frequency and high-temperature vector magnetic field sensors.
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Naifar, Slim. "Model Based Design of a Magnetoelectric Vibration Converter from Weak Kinetic Sources." Universitätsverlag Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A32774.
Full textAbstract:
The main challenge in the design of vibration energy harvesters is the optimization of energy outcome relative to the applied excitation to reach a higher efficiency in spite of the weakness of ambient energy sources. One promising principle of vibration converters is magnetoelectricity due to the outstanding properties of magnetostrictive and piezoelectric laminate composites, which provide interesting possibilities to harvest energy from low amplitude and low frequency vibration with relatively high energy outcome. For these devices, ensuring high deformations in the magnetostricive layers, improvement of the magnto-mechanical and the electro-mechanical couplings are highly required for the optimization of the energy outcome.
This thesis primarily aims to develop a model based harvester design for magnetoelectric (ME) converters. Based on a comprehensive understanding of the complex energy flow in magnetoelectric transducers, several design parameters are investigated. For instance, magnetostriction in a Terfenol-D plate is investigated by means of atomic force microscopy under similar conditions as within magnetoelectric transducers. A novel measurement approach was successfully developed to detect the evolution of magnetic domains and measure deformations in a Terfenol-D plate in response to externally non-uniform applied magnetic fields.
Furthermore, a finite element model is developed to predict the induced voltage in the ME transducer as a response to the magnet’s displacement, corrected based on atomic force microscopy measurements, and used for the design of the harvester. The presented three- dimensional model takes into consideration the nonlinear behaviour of the magnetostrictive and piezoelectric materials. Additionally, three novel converters having different magnetic circuits are designed and analysed analytically based on Lindstedt-Poincaré method. The effects of the structure parameters, such as the nonlinear magnetic forces, the magnetic field distribution and the resonance frequency are discussed, and the electric output performances of the three designed converters are evaluated.
In order to improve both mechanical and electrical coupling between the piezoelectric and the magnetostrictive layers, a bonding technique at room temperature is proposed which uses conductive polymer nanocomposites. Two magnetoelectric transducers are fabricated based on this technique having 1 wt.% and 2 wt.% concentration of multiwalled carbon nanotubes in epoxy resin. Another magnetoelectric transducer is fabricated by a classical technique for comparison purposes.
In order to validate the design, a series of demonstrators are designed and fabricated according to the simulation and optimization results. The proposed design is composed by a cantilever beam, a magnetic circuit with several magnet arrangements and a magnetoelectric transducer, which is formed by a piezoelectric PMNT plate bonded to two magnetostrictive Terfenol-D layers. In this design, external vibrations are converted to magnetic field changes acting on the magnetostrictive layers leading to deformations, which are transmitted directly to the piezoelectric layer.
The converters are tested under harmonic excitations and real vibration profiles reproduced by an artificial vibration source. Different parameters were investigated experimentally including the magnetic forces between the transducer and the magnetic circuit and the used bonding technique. Tuning the resonance frequency of the ME converter is also addressed using a simple screw/nut system, which allows to control the relative position and therefore the magnetic forces between the magnetic circuit and the transducer.
The magnetoelectric transducer bonded with 2 wt.% concentration of multiwalled carbon nanotubes shows better output performances than the two other ME transducers under similar excitations. A maximum power output of 2.42 mW is reached under 1 mm applied vibration at 40 Hz. This performance presents an improvement of minimum 20 % of the reached energy outcome by other magnetoelectric vibration converters using single ME transducer at comparable applied excitations.<br>Die größte Herausforderung bei der Konstruktion von Vibrations-Energiewandlern ist die Optimierung der gewonnenen Energie im Verhältnis zur angewandten Anregung, um trotz schwacher Umgebungsenergiequellen einen hohen Wirkungsgrad zu erreichen. Ein vielversprechendes Prinzip von Vibrationswandlern ist die Magnetoelektrizität aufgrund der hervorragenden Eigenschaften von magnetostriktiven und piezoelektrischen Verbundwerkstoffen, die interessante Möglichkeiten bieten, Energie aus niederfrequenten Schwingungen mit kleinen Amplituden zu gewinnen. Bei diesen Wandlern ist die Sicherstellung hoher Verformungen in den magnetostriktiven Schichten, die Verbesserung der magnetisch-mechanischen und der elektromechanischen Kopplungen für die Optimierung des Energieertrages sehr wichtig.
Diese Arbeit zielt in erster Linie auf die Entwicklung eines modellbasierten Entwurfs für magnetoelektrische (ME) Wandler ab. Basierend auf einem umfassenden Verständnis des komplexen Energieflusses in magnetoelektrischen Wandlern werden mehrere Entwurfsparameter untersucht.
So wird beispielsweise die Magnetostriktion in einer Terfenol-D-Platte mittels Rasterkraftmikroskopie unter ähnlichen Bedingungen untersucht wie in magnetoelektrischen Wandlern. Dabei wurde eine neuartige Messmethode erfolgreich entwickelt, um die Entwicklung von magnetischen Domänen zu erfassen und die Deformation in einer Terfenol-D-Platte als Reaktion auf extern ungleichmäßig angelegte Magnetfelder zu messen. Darüber hinaus wird ein Finite-Elemente-Modell entwickelt, um die induzierte Spannung im ME-Wandler als Reaktion auf die Verschiebung des Magneten vorherzusagen, welches auf der Grundlage von Atomkraftmikroskopie Messungen korrigiert und für den Entwurf des Energiewandlers verwendet wird. Das vorgestellte dreidimensionale Modell berücksichtigt das nichtlineare Verhalten der magnetostriktiven und piezoelektrischen Materialien. Zusätzlich werden drei neuartige Wandler mit unterschiedlichen Magnetkreisen nach dem Lindstedt-Poincaré Verfahren konzipiert und analytisch analysiert. Die Auswirkungen der Strukturparameter, wie die nichtlinearen Magnetkräfte, die Magnetfeldverteilung und die Resonanzfrequenz, werden diskutiert und die elektrischen Ausgangsleistungen der drei ausgelegten Wandler ausgewertet.
Um die mechanische und elektrische Kopplung zwischen der piezoelektrischen und der magnetostriktiven Schicht zu verbessern, wird eine bei Raumtemperatur prozessierbare Verbindungstechnik vorgeschlagen, bei der leitfähige Nanokomposite verwendet werden. Zwei magnetoelektrische Wandler werden basierend auf dieser Technik mit einer Konzentration von 1 wt.% und 2 wt.% an mehrwandigen Kohlenstoff-Nanoröhren in Epoxidharz hergestellt. Ein weiterer magnetoelektrischer Wandler wurde zu Vergleichszwecken mit einer klassischen Technik hergestellt. Für die Validierung des Entwurfes wird eine Reihe von Demonstratoren entsprechend den Simulations- und Optimierungsergebnissen konstruiert und gefertigt. Der vorgeschlagene Entwurf besteht aus einem Trägerbalken, einem Magnetkreis mit mehreren Magnetanordnungen und einem magnetoelektrischen Wandler, der aus einer piezoelektrischen PMNT-Platte besteht, die mit zwei magnetostriktiven Terfenol-D-Schichten verbunden ist. Bei dieser Konstruktion werden externe Schwingungen in Magnetfeldänderungen umgewandelt, die auf die magnetostriktiven Schichten wirken und zu Verformungen führen, die direkt auf die piezoelektrische Schicht übertragen werden.
Die Wandler werden unter harmonischen Anregungen und mit realen Schwingungsprofilen getestet, die von einer künstlichen Schwingungsquelle reproduziert werden. Verschiedene Parameter wurden experimentell untersucht, darunter die magnetischen Kräfte zwischen dem Wandler und dem Magnetkreis sowie die verwendete Verbindungstechnik. Die Abstimmung der Resonanzfrequenz des ME-Wandlers erfolgt ebenfalls über ein einfaches Schrauben-Mutter-System, das es ermöglicht, die relative Position und damit die magnetischen Kräfte zwischen Magnetkreis und Wandler zu steuern.
Der magnetoelektrische Wandler, der mit einer Konzentration von 2 wt.% mehrwandiger Kohlenstoff-Nanoröhrchen verbunden ist, zeigt bessere Ausgangsleistungen als die beiden anderen ME-Wandler bei ähnlichen Anregungen. Eine maximale Ausgangsleistung von 2,42 mW wird bei 1 mm angelegter Vibration bei 40 Hz erreicht. Diese Leistung stellt eine Verbesserung von mindestens 20 % im Vergleich zu anderen magnetoelektrischen Schwingungsumrichtern dar, welche mit einem einzigen ME-Wandler bei vergleichbaren Anregungen getestet werden.
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Malleron, Kevin. "Modélisation multiphysique, caractérisation et conception de transducteurs magnétoélectriques pour l'alimentation de capteurs biomédicaux autonomes." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS203.
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Afin d'éviter une opération de remplacement de la batterie d'un dispositif biomédical, nous proposons d'utiliser une technique innovante de rechargement sans fils utilisant des matériaux magnétoélectriques. L'effet magnétoélectrique extrinsèque est principalement issu de la combinaison de deux phénomènes : piézoélectricité et magnétostriction. L'idée est de réaliser une transmission d'énergie sans fils basée sur les techniques d'induction en champ proche : on applique un champ magnétique, le récepteur qui servira de transducteur d'énergie sera composé d'un matériau magnétostrictif, qui, sous l'effet du champ magnétique va se déformer, les contraintes mécaniques sont transmises au matériau piézoélectrique qui se polarise. On mesure alors une tension électrique aux bornes du piézoélectrique qui peut ensuite servir à alimenter ou recharger un dispositif électronique. Cette thèse contribue au développement de cette technique en proposant des pistes d'améliorations de la puissance transmissible afin de pouvoir alimenter des capteurs avec un transducteur le plus petit possible. Pour ce faire, une modélisation par éléments finis 2D est présentée ainsi que des mesures de puissance et le développement du banc de caractérisation associé<br>In order to avoid surgery for battery replacement or recharge, we propose to use an innovative technique to wirelessly recharge the battery using magnetoelectric materials. The magnetoelectric effect is issued of two combined phenomena: piezoelectricity and magnetostriction. The idea is to achieve a wireless power transmission based on the near magnetic field techniques: the source energy is emitted via a magnetic field and the receptor which will transduce the energy is a magnetoelectric material. The magnetostrictive part of the magnetoelectric transducer is subjected to a stress due to the magnetic field. The stress is transmitted to the piezoelectric part which will produce an electric field. The electric voltage collected from the electrodes of the piezoelectric material will be used to power or recharge electronic devices. This thesis contributes to the development of this technique by proposing improving ways for energy transmission to powering sensors with the smallest transducer possible. An 2D finite element model his presented with power measurements and the characterizing bench associated
Books on the topic "Magnetostriction energy"
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Calkins, F. T. An energy-based hysteresis model for magnetostrictive transducers. National Aeronautics and Space Administration, Langley Research Center, 1997.
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C, Smith R., Flatau A. B, and Langley Research Center, eds. An energy-based hysteresis model for magnetostrictive transducers: Prepared for Langley Research Center under contracts NAS1-97046 & NAS1-19480. National Aeronautics and Space Administration, Langley Research Center, 1997.
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C, Smith R., Flatau A. B, and Langley Research Center, eds. An energy-based hysteresis model for magnetostrictive transducers: Prepared for Langley Research Center under contracts NAS1-97046 & NAS1-19480. National Aeronautics and Space Administration, Langley Research Center, 1997.
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An energy-based hysteresis model for magnetostrictive transducers: Prepared for Langley Research Center under contracts NAS1-97046 & NAS1-19480. National Aeronautics and Space Administration, Langley Research Center, 1997.
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An energy-based hysteresis model for magnetostrictive transducers: Prepared for Langley Research Center under contracts NAS1-97046 & NAS1-19480. National Aeronautics and Space Administration, Langley Research Center, 1997.
Find full textBook chapters on the topic "Magnetostriction energy"
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Zhukov, A., M. Churyukanova, S. Kaloshkin, et al. "Magnetostriction of Co-Fe-Based Amorphous Soft Magnetic Microwires." In Energy Technology 2015. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093220.ch29.
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Zhukov, A., M. Churyukanova, S. Kaloshkin, et al. "Magnetostriction of Co-Fe-Based Amorphous Soft Magnetic Microwires." In Energy Technology 2015. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48220-0_29.
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Koroleva, L. I. "Connection of Giant Volume Magnetostriction with Colossal Magnetoresistance in Manganites." In Mixed Ionic Electronic Conducting Perovskites for Advanced Energy Systems. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2349-1_14.
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Vieira, António, João Espírito Santo, Cristiano P. Coutinho, et al. "Experimental Evaluation of Magnetostrictive Strain of Electrical Steel." In Green Energy and Networking. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-12950-7_11.
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Ren, Chai, Biswadeep Saha, Meenakshisundaram Ramanathan, and Sivaraman Guruswamy. "Effect of W Substitution on the Magnetostrictive Behavior of [001] Fe-Ga Alloy Single Crystal." In Energy Technology 2012. John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118365038.ch31.
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Berbyuk, Viktor. "Optimal Design of Magnetostrictive Transducers for Power Harvesting From Vibrations." In Structural Dynamics and Renewable Energy, Volume 1. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9716-6_18.
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Ha, Tuan Minh, Saiji Fukada, Toshiyuki Ueno, and Duc-Duy Ho. "Practical Performance of Magnetostrictive Vibration Energy Harvester in Highway Bridge." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5144-4_74.
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Echouai, Brahim, Ahmed Adri, Omar Outassafte, Yassine El Khouddar, Issam El Hantati, and Rhali Benamar. "Control of Transverse Vibrations in Functional Gradient Beams with Magnetostrictive Layers of Terfenol-D Resting on a Winkler Foundation." In Springer Proceedings in Energy. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-57022-3_21.
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Dolui, Cherosree, Shamik Dasadhikari, Dipanjan Bose, Debabrata Roy, and Chandan Kumar Chanda. "Different Structural Configurations of Magnetostrictive Energy Harvester: A Comprehensive Review for Sensor Applications." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-7018-2_27.
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"Magnetic domains, energy minimisation and magnetostriction." In Electrical Steels - Volume 1: Fundamentals and basic concepts. Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/pbpo157f_ch3.
Full textConference papers on the topic "Magnetostriction energy"
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Zhao, Yongjin, Gepeng Wang, Qiang Sun, Jian Wu, Chen Shen, and Jiayuan Guo. "Study on the Magnetostriction and No-load Noise of Power Transformer Considering Core Joints." In 2024 3rd International Conference on Energy and Electrical Power Systems (ICEEPS). IEEE, 2024. http://dx.doi.org/10.1109/iceeps62542.2024.10693211.
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Jarram, Paul. "Remote Measurement of Stress in Carbon Steel Pipelines - Developments in Remote Magnetic Monitoring." In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07181.
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Abstract Monitoring the integrity of buried ageing ferromagnetic pipelines is a significant problem for infrastructure operators. Typically inspection relies on pig surveys, Direct Current Voltage Gradient (DCVG), Close Interval Potential Survey (CIPS) and contact Non-destructive testing (NDT) methods that often require pipes to be excavated and exposed at great expense. This paper outlines recent developments in a novel remote sensing technique to detect corrosion, metal defects and the effects of ground movement on pipeline stress by mapping variations in the earth's magnetic field around pipelines. Magnetostriction and its inverse, the Villari effect, is the process by which randomly oriented magnetic domains develop inside the structure of ferromagnetic materials, such as carbon steel alloys, in response to localised stress resulting in detectable magnetic anomalies in the background magnetic field. Corrosion, metallurgical defects and ground movements result in areas of increased localised stress in pressurised pipelines, which in turn generates a localised magnetic field. Measurement of the remote magnetic field around a pipeline due to magnetostriction allows the measurement of stress and determines the location of defects in the pipe wall. The paper first summarizes magnetostriction in ferromagnetic materials and then describes how measurements of remote magnetic field can be applied to define the location of defects in operational pipelines along with the benefits and limitations of using this technique. These include considerable cost savings since no modification to the line is required, no input of energy or change to its operational parameters is needed and, crucially, no excavations are needed to calibrate preliminary results
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Matsui, Akira, Yoshio Yamamoto, and Masahiro Hanazawa. "Energy scavenging using giant magnetostriction material: Prototype development." In IECON 2011 - 37th Annual Conference of IEEE Industrial Electronics. IEEE, 2011. http://dx.doi.org/10.1109/iecon.2011.6119425.
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Liu, Yuanyuan, Laurent Daniel, Benjamin Ducharne, Gael Sebald, Mickael Lallart, and Kanjuro Makihara. "Anisotropic magnetostriction for low-frequency energy harvesting applications." In 2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers). IEEE, 2023. http://dx.doi.org/10.1109/intermagshortpapers58606.2023.10305050.
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Lahyaoui, Otmane, Vincent Lanfranchi, Serigne Saliou Mbengue, and Nicolas Buiron. "Macroscopic model of magnetostriction based on energy minimization." In 2016 11th France-Japan & 9th Europe-Asia Congress on Mechatronics (MECATRONICS) /17th Internationall Conference on Research and Education in Mechatronics (REM). IEEE, 2016. http://dx.doi.org/10.1109/mecatronics.2016.7547147.
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Braghin, Francesco, Simone Cinquemani, and Ferruccio Resta. "Power Harvesting Through Magnetostrictive Devices: A Linear Model." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24888.
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Energy harvesting, sometimes referred to as “power scavenging” or “energy extraction”, can be defined as “converting ambient energies such as vibration, temperature, light, RF energy, etc. to usable electrical energy by using energy conversion materials or structures, and subsequent storage of the electrical energy for powering electric devices”. There has been a significant increase in the research on vibration-based energy harvesting in recent years. In this contest magnetostrictive devices are considered a promising technology. The Villari effect, also known as the inverse magnetomechanical effect, is the change in magnetization that a magnetostrictive material undergoes when subjected to an applied uniaxial stress. This effect pertains to the transduction of energy from the elastic to the magnetic state and is inverse of Joule magnetostriction. Furthermore, the Villari effect exhibits many of the attributes of the direct magnetostrictive effect since its physical origin lies in magnetoelastic coupling. Transducers utilizing the Villari effect consist of a coil wound on a core of magnetostrictive material. In this paper, a linear magnetomechanical coupling model is developed to analytically calculate the potential electrical power such transducers can generate when subjected to applied harmonic mechanical vibration. Theoretical results are confirmed by experimental tests on two different magnetostrictive devices.
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Cai, Yifei, Fares S. El-Faouri, Naoki Saikawa, Akira Chiba, and Souichiro Yoshizaki. "Magnetostriction Effect on Vibration in Switched Reluctance Motors." In 2023 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2023. http://dx.doi.org/10.1109/ecce53617.2023.10362149.
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Yoo, Jin-Hyeong, Alison Flatau, and Ashish Purekar. "Performance of Galfenol Energy Harvester at High Temperature." In ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-5040.
Full textAbstract:
Recently, the development of energy harvesting devices has received considerable interest as a means of powering nodes in a wireless sensor network. Additionally, the ability to operate in a high temperature environment is a desired feature especially in the case of wireless sensor networks used in a power plant where elevated temperatures are normal. Vibration based energy harvesting is one method of scavenging energy from the environment. Traditional approaches for vibration based energy harvesting have focused primarily on piezoelectric and electromagnetic approaches. There are, however, limitations associated with high temperature applications. Iron-Gallium alloys (Galfenol) are highly magnetostrictive with magnetically induced strains as high as 400 ppm in single crystals and 280 ppm in highly textured polycrystals. Galfenol is machineable, weldable, and has tensile strength of approximately 500 MPa. These unique properties foreshadow the material’s use in conventional transducers operating in severe environments. An investigation into the magnetostriction performance at temperatures up to 225°C found magnetostriction degraded relative to that at room temperature by close to 25%. From those measurements, two important advantages of Galfenol were found. First, even though the performance degraded at 225°C, the original performance is recovered when the temperature comes back to room temperature. The second advantage is that the performance at 225°C was stable. Based on these results, it was determined that Galfenol could be utilized at temperatures of at least 225 °C. In this paper, a series of tests are conducted in a thermal chamber to evaluate the Galfenol energy harvester performances from temperatures ranging from room temperature to 200°C. A linear coupled model for a Galfenol energy harvester is developed based on fundamental properties of a tuned mass beam system. A non-linear version of the model is developed and compared to experimental evaluations. A comparison with experimental evaluations provides good correlation with results. It is shown that the Galfenol energy harvester can provide consistent power from room temperature to 200°C.
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Yoo, Jin-Hyeong, James B. Restorff, Marilyn Wun-Fogle, and Alison B. Flatau. "Induced Magnetic Anisotropy in Stress-Annealed Galfenol Laminated Rods." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-636.
Full textAbstract:
The recent discovery of Iron-Gallium alloy (Galfenol) as a “large” magnetostrictive material (as high as 400 ppm) offers a particularly promising transducer material that combines largely desirable mechanical attributes with superior magnetic properties [1]. The high permeability of this material makes it easy to magnetize, however it also causes a relatively low cutoff frequency in dynamic applications, above which eddy currents form and introduce significant power losses. To reduce the eddy current losses, magnetostrictive drivers used in dynamic applications are commonly laminated. A second transducer design consideration is the introduction of an initial alignment of domains inside of the material to maximize the magnetostriction performance. It is common to achieve this by imposing an external compressive prestress to align magnetic moments perpendicular to the direction of actuation. An alternative to the application of an external prestress is to build-in a uniaxial magnetic anisotropy through stress annealing [2]. Stress annealing is a high temperature process with simultaneous application of an external load and subsequent cooling under load in which the magnetic moment alignment developed at temperature is retained upon removal from the stress annealing fixture. The external load needed to build in a useful uniaxial magnetic anisotropy in Galfenol is greater than the buckling load for Galfenol laminae sized for use in high frequency dynamic applications. In this study, prior work on stress annealing of solid rods of single and polycrystalline samples of Galfenol is successfully extended to thin laminae of Galfenol by introducing fixtures to avoid buckling of the laminae under compression during the heat treatment process. Values of the uniaxial anisotropy, cubic anisotropy, saturation magnetic induction, and saturation magnetostriction were obtained from measurements of the magnetization and magnetostriction of stress-annealed Galfenol strip as a function of compressive and tensile stress. These values were derived from fitting magnetization and magnetostriction curves to the energy expression formula [3]. Data are presented that demonstrate the magnetic uniaxial anisotropy developed by stress annealing of laminated Galfenol rods. An annealing temperature of 500 °C and a compressive stress of 200 MPa produced a uniaxial anisotropy of 11.3 kJ/m3 in this study.
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Li, Bowen, Bing Tian, Changbao Xu, Qihui Feng, and Zejie Tan. "Magnetic Field Sensor Based on Magnetostriction-Piezoelectric Effect." In 2023 3rd International Conference on Energy Engineering and Power Systems (EEPS). IEEE, 2023. http://dx.doi.org/10.1109/eeps58791.2023.10256849.
Full textReports on the topic "Magnetostriction energy"
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Krause, Thomas, Mehrdad Keshefi, Ross Underhill, and Lynann Clapham. PR652-203801-R02 Magnetic Object Model for Large Standoff Magnetometry Measurement. Pipeline Research Council International, Inc. (PRCI), 2021. http://dx.doi.org/10.55274/r0012151.
Full textAbstract:
Ferromagnetic pipeline steel may exhibit magnetization, even in the absence of applied magnetic fields, due to remnant fields or the presence of pipe wall stress. Remnant magnetization may be present from previous or existing exposure to a magnetic field, while pipe wall stress induced magnetization can result from line pressure, environmental stresses due to settling or geohazard conditions, and residual stresses due to nonuniform plastic deformation caused by manufacturing processes, installation or operating conditions. The local stress state of the pipeline may also be altered by corrosion or damage. The physical basis for magnetization in pipelines due to intrinsic and resident stresses is examined here using the magnetic object (MO) model. MOs are characterized as regions of relatively independent magnetic behaviour, typically about the size of a ferromagnetic steel grain, to which expressions for the magnetic energy of local domain structures can be applied. The lowest energy state for an MO is a flux-closed structure, but the presence of stress can modify the MO energy through inverse magnetostrictive effects on the domain structure and thereby, produce a state of magnetization. This magnetization may be altered by the introduction of additional stress sources including pressurization of the pipe, geological-environment effects, sources of magnetization that include the proximity of other ferromagnetic pipes, even those comprising sections of the same pipeline, and changes in the pipe structure that may be brought about by deformation, corrosion or cracking. This work shows that the fundamental building block of the MO, combined with considerations of overall changes in domain structure due to these factors, can be used to model the generation of magnetic fields measured outside of pipeline structures. This will have implications for understanding sources of pipeline magnetization that are passively measured above buried oil and gas pipelines with the objective of detecting anomalous conditions that may indicate compromised conditions for safe pipeline operation.