Relevant bibliographies by topics / Magnetic stray field

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Magnetic stray field'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Magnetic stray field"

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McDonald, P. J. "Stray field magnetic resonance imaging." Progress in Nuclear Magnetic Resonance Spectroscopy 30, no. 1-2 (March 1997): 69–99. http://dx.doi.org/10.1016/s0079-6565(96)01035-7.

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McDonald, P. J., and B. Newling. "Stray field magnetic resonance imaging." Reports on Progress in Physics 61, no. 11 (November 1, 1998): 1441–93. http://dx.doi.org/10.1088/0034-4885/61/11/001.

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ZICK, K. "STRAY FIELD MAGNETIC RESONANCE IMAGING." Nondestructive Testing and Evaluation 11, no. 5 (September 1994): 255–60. http://dx.doi.org/10.1080/10589759408956407.

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Mallett, M. J. D., M. R. Halse, and J. H. Strange. "Stray Field Imaging by Magnetic Field Sweep." Journal of Magnetic Resonance 132, no. 1 (May 1998): 172–75. http://dx.doi.org/10.1006/jmre.1998.1385.

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Koo, Hyun Cheol, Jonghwa Eom, Joonyeon Chang, and Suk-Hee Han. "A spin field effect transistor using stray magnetic fields." Solid-State Electronics 53, no. 9 (September 2009): 1016–19. http://dx.doi.org/10.1016/j.sse.2009.06.006.

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Štrac, Leonardo. "Three-Phase Shunts for Stray Magnetic Field." Procedia Engineering 202 (2017): 183–88. http://dx.doi.org/10.1016/j.proeng.2017.09.706.

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Kakugawa, S., N. Hino, A. Komura, M. Kitamura, H. Takeshima, T. Yatsuo, and H. Tazaki. "Shielding Stray Magnetic Fields of Open High Field MRI Magnets." IEEE Transactions on Appiled Superconductivity 14, no. 2 (June 2004): 1639–42. http://dx.doi.org/10.1109/tasc.2004.831023.

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Kakugawa, S., N. Hino, A. Komura, M. Kitamura, H. Takeshima, T. Yatsuo, and H. Tazaki. "Shielding stray magnetic fields of open high field MRI magnets." IEEE Transactions on Applied Superconductivity 14, no. 2 (2004): 1639–42. http://dx.doi.org/10.1109/tasc.2004.931023.

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Saif, A. G. "Distorted flux lines behavior in type II superconducting spherical shell: Application to high temperature superconductor." International Journal of Modern Physics B 02, no. 05 (October 1988): 1121–32. http://dx.doi.org/10.1142/s0217979288001001.

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A model of a type II superconducting grains (of a spherical shell shape) is suggested to verify the properties of distorted flux lines (FLs) in high temperature superconductors (HTS). The magnetic fields distributions and current density are formulated. It will be shown that the magnetic field inside a superconducting region is composed of the penetrating applied field, FLs fields, and a stray field. Outside the superconductor, there is only the applied field and the stray field . However, in the normal interior region (r < a), there is only the stray field. Moreover, the forces on the flux line (FL) segments are completely determined.
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Yang, Yong, Ming Zhang, Zhiquan Song, Minxue Xia, Kexun Yu, and Li Jiang. "Stray Magnetic Field Analysis of ITER Poloidal Field Converter Unit." IEEE Transactions on Plasma Science 45, no. 3 (March 2017): 495–500. http://dx.doi.org/10.1109/tps.2017.2655264.

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Dissertations / Theses on the topic "Magnetic stray field"

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Lui, Zheng. "Stray magnetic field based health monitoring of electrical machines." Thesis, University of Newcastle upon Tyne, 2018. http://hdl.handle.net/10443/4105.

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Electrical machines are widely used in industrial and transportation applications which are essential to industrial processes. However, the lack of reliability and unpredictable life cycles of these machines still present opportunities and challenges for condition monitoring research. The breakdown of an electrical machine leads to expensive repairs and high losses due to downtime. The motivation of this research is to improve the reliability of electrical machines and to classify different kinds of failures via non-intrusive methods for condition-based maintenance and early warning of failure. Major potential failure types in electrical machines are winding and mechanical failures, which are caused by dynamic load state, component ageing and harsh working environments. To monitor and characterise these abnormal situations in the early stages, this thesis proposes stray magnetic field-based condition monitoring allowing fault diagnosis with the help of finite element models and advanced signal processing technology. By investigating the interaction between stray flux variations and machine failure, different kinds of faults can be classified and distinguished via numerical and experimental studies. A non-intrusive stray flux monitoring system has been developed and can provide both static and transient stray flux information and imaging. The designed monitoring system is based on a giant magnetoresistance (GMR) sensor used to capture low stray flux fields outside the electrical machine's frame. Compared with other monitoring systems, its small size, low cost, non-inventive and ease of setting up make the designed system more attractive for in many long-term monitoring applications. Additionally, integration with the wireless sensor network (WSN) means that the latter's unique characteristics makes the proposed system suitable for electrical machine monitoring in industrial applications replacing existing expensive wired systems. The proposed system can achieve real-time data collection and on-line monitoring with the help of spectrogram and independent component analysis. Three cases studies are conducted to validate the proposed system with different failures and loading states, using load fatigue, winding short-circuit failure and mechanical testing. In these case studies, electrical and mechanical failures and dynamic loads are investigated, collecting stray flux information with different kinds and sizes of electrical machines using both simulation and experimental approaches. Stray flux information is collected for different situations of winding failure, unbalanced load and bearing failures. Comprehensive transient feature extraction using spectrogram is implemented with respect to multiple failures and load variations. Spectrograms of stray flux can provide time-frequency information allowing the discrimination of different failures and load states. Different faults can be distinguished through independent component analysis of stray flux data. Compared with traditional and current detection strategies, stray flux-based monitoring can not only provide failure indicator and better resolution but also gives location information. Additionally, by applying different feature extraction methods, different failure types can be separated based on stray flux information, which is likely to be difficult to achieve using traditional monitoring approaches. However, stray flux monitoring systems suffer from issue of noise and instability, and more case studies and investigations are needed for further refinement.
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Walmsley, Nicholas S. "Theoretical studies of stray field images of magnetic systems." Thesis, University of Central Lancashire, 1995. http://clok.uclan.ac.uk/20523/.

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Research in magnetic recording is currently at a stage where an understanding of the magnetic microstructure of recording media is vitai for the continual improvement in recording performance and the achievement of higher recording densities. Experimental techniques such as Lorentz Imaging and Magnetic Force Microscopy provide powerful tools to achieve help these objectives. This thesis provides a theoretical study of the relationship between magnetic systems and their microstructures by developing models to simulate the imaging of such systems. An important aspect of the recording process is the design and manufacture of head systems to improve the read/write process. Lorentz Imaging of recording heads is used to characterise the stray field profile of such components; we have developed a theoretical model which predicts the major characteristics of the stray field profile of a thin film recording head. A major part of the thesis is devoted to the simulation of magnetic reversal and imaging of longitudinal thin films. This has been carried out by considering a system of interacting grains positioned on an irregular physical structure; previously, micromagnetic models have been based on Hexagonal Close Packing structures. This enables the investigation into the effect of physical structure on the macromagnetic properties of such systems. We have developed theoretical models to simulate the imaging of longitudinal thin film. Both the simulated Lorentz and Magnetic Force Microscopy images highlight features caused by the underlying physical structure. This analysis contributes to an explanation of the relationship between magnetic inicrostructure, physical structure and images of magnetic systems; it provides a wider context for the discussion of experimental data.
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Lu, Ming. "Synergetic Attenuation of Stray Magnetic Field in Inductive Power Transfer." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78621.

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Significant stray magnetic field exists around the coils when charging the electric vehicles (EVs) with inductive power transfer (IPT), owning to the large air gap between the transmitter and receiver. The methods for field attenuation usually introduce extra losses and reduce the efficiency. This study focuses on the synergetic attenuation of stray magnetic field which is optimized simultaneously with the efficiency. The optimization is realized with Pareto front. In this dissertation, three methods are discussed for the field attenuation. The first method is to tune the physical parameters of the winding, such as the inner radii, outer radii, distribution of the turns, and types of the litz wires. The second method is to add metal shields around the IPT coils, in which litz wires are used as shields to reduce the shielding losses. The third method is to control the phases of winding currents, which avoids increasing the size and weight of the IPT coils. To attenuate the stray magnetic field by tuning the physical parameters, the conventional method is to sweep all the physical parameters in finite-element simulation. This takes thousands of simulations to derive the Pareto front, and it's especially time-consuming for three-dimensional simulations. This dissertation demonstrates a faster method to derive the Pareto front. The windings are replaced by the lumped loops. As long as the number of turns for each loop is known, the efficiency and magnetic field are calculated directly from the permeance matrices and current-to-field matrices. The sweep of physical parameters in finite-element simulation is replaced by the sweep of the turns numbers for the lumped loops in calculation. Only tens of simulations are required in the entire procedure, which are used to derive the matrices. An exemplary set of coils was built and tested. The efficiency from the matrix calculation is the same as the experimental measurement. The difference for stray magnetic field is less than 12.5%. Metal shields attenuate the stray magnetic field effectively, but generates significant losses owning to the uneven distribution of shield currents. This dissertation uses litz wires to replace the conventional plate shield or ring shield. Skin effect is eliminated so the shield currents are uniformly distributed and the losses are reduced. The litz shields are categorized to two types: shorted litz shield and driven litz shield. Circuit models are derived to analyze their behaviors. The concept of lumped-loop model is applied to derive the Pareto front of efficiency versus stray magnetic field for the coils with litz shield. In an exemplary IPT system, coils without metal shield and with metal shields are optimized for the same efficiency. Both the simulation and experimental measurement verify that the shorted litz shield has the best performance. The stray magnetic field is attenuated by 65% compared to the coils without shield. This dissertation also introduces the method to attenuate the stray magnetic field by controlling the phases of winding currents. The magnetic field around the coils is decomposed to the component in the axial direction and the component in the radial direction. The axial component decreases with smaller phase difference between windings' currents, while the radial component exhibits the opposite property. Because the axial component is dominant around the IPT coils, decreasing the phase difference is preferred. The dual-side-controlled converter is applied for the circuit realization. Bridges with active switches are used for both the inverter on the transmitter side and the rectifier on the receiver side. The effectiveness of this method was verified both in simulation and experiment. Compared to the conventional series-series IPT with 90° phase difference between winding currents, stray magnetic field was attenuated by up to 30% and 40% when the phase differences of winding currents are 50° and 40°, respectively. Furthermore, an analytical method is investigated to calculate the proximity-effect resistance of the planar coils with ferrite plate. The objective of this method is to work together with the fast optimization which uses the lumped-loop model. The existence of the ferrite plate complicates the calculation of the magnetic field across each turn which is critical to derive the proximity-effect resistance. In this dissertation, the ferrite plate is replaced by the mirrored turns according to the method of image. The magnetic fields are then obtained from Ampere's Law and Biot-Savart Law. Up to 200 kHz, the difference of the proximity-effect resistance is less than 15% between calculation and measurement.
Ph. D.
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Lane, Deirdre Maire. "A stray field magnetic resonance study of solvent transport in methacrylate polymers." Thesis, University of Surrey, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246068.

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Körner, Michael. "Morphology-Induced Magnetic Phenomena Studied by Broadband Ferromagnetic Resonance." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-127005.

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In the present work, the influence of the morphology of thin ferromagnetic films on their static as well as dynamic magnetic properties was investigated by means of broadband ferromagnetic resonance (FMR). Using an ion beam erosion process the surface of the substrates was periodically modulated (ripples), where the modulation wavelength is determined by the ion energy. In this way a well-controllable roughness profile evolves ranging from a few ten up to several hundreds of nanometers in wavelength. The substrate’s surface profile in turn is repeated by films grown on top offering an easy and fast approach to investigate morphology influences on the magnetic properties. This work aims on modifications of the magnetic anisotropy as well as the FMR linewidth of the magnetic relaxation process. Prior to magnetic investigations the existing FMR setup was extended to measure FMR spectra at a fixed microwave frequency while sweeping the external magnetic field. Furthermore, a software toolbox was developed to perform the data processing and evaluation. Starting with the morphology influence on the magnetic anisotropy 10 nm thin Fe, Co, and Ni81Fe19 (Permalloy ≡ Py) films were deposited on rippled Si substrates. Due to Si displacements during ion erosion and natural oxidation the rippled Si substrates exhibit an amorphous surface causing a polycrystalline material growth. This leads to a suppression of magneto-crystalline anisotropy leaving only morphology-induced anisotropy contributions. Here, a uniaxial magnetic anisotropy (UMA) was observed that aligns its easy axis with the ripple ridges, whereas its strength decays with increasing ripple wavelength for all materials. From thickness-dependent measurements two characteristic regions were determined with competing uniaxial volume and surface anisotropy contributions. Underlined by micromagnetic simulations a dominant volume contribution was found in the thin region accompanied by magnetic moments nearly following the surface corrugation. In the thick region the UMA is controlled by dipolar stray fields at the surface. In contrast to Si, ion eroded MgO keeps its crystal structure offering epitaxial growth of 10 nm thin single-crystalline Fe films. Consequently, a superposition of morphology-induced UMA and magneto-crystalline cubic anisotropy was observed. The direction of the ripple ridges is predetermined by the incident ion beam, which allows to freely orient the UMA’s direction with respect to the cubic anisotropy, offering a possibility for anisotropy engineering. In comparison to the planar reference case rippled magnetic films exhibit lower intrinsic and extrinsic relaxation contributions. For the final part, 30 nm Py was grown on rippled Si covering modulation wavelengths λ ranging from 27 to 432 nm. Using magnetic force microscopy and holography measurements the dipolar stray fields above and inside the magnetic layer were characterized. For λ ≥ 222 nm, the stray fields act as scattering centers for spin waves triggering two-magnon scattering (TMS). This causes an apparent line broadening generating distinct peaks in the frequency-dependent linewidth whose position can be tuned by altering λ. These effects are understood in the framework of a perturbation theory of spin waves in periodically perturbed films recently presented in the literature. Furthermore, the in-plane angular dependence of the linewidth revealed a two-fold symmetry, which is not present for vanishing TMS at small λ
In Rahmen dieser Arbeit wurde der Einfluss der Morphologie eines dünnen ferromagnetischen Films auf dessen statische und dynamische Eigenschaften mittels breitbandiger ferromag- netischer Resonanz (FMR) untersucht. Durch Ionenstrahl-Erosion wurde die Oberfläche des verwendeten Substrats periodisch moduliert (Ripple), wobei die Wellenlänge der Modulation durch die Ionenenergie bestimmt ist. Dies ermöglicht die kontrollierte Herstellung rauer Oberflächen mit Wellenlängen zwischen wenigen zehn bis zu einigen hundert Nanometern. Werden auf diesen Oberflächen Filme abgeschieden, übernehmen diese die Modulation. Somit ergibt sich eine einfache und schnelle Untersuchungsmöglichkeit der magnetischen Filmeigenschaften in Hinblick auf die Morphologie. Das Ziel dieser Arbeit ist die Untersuchung von Morphologieeinflüssen auf die magnetische Anisotropie sowie FMR-Linienbreite. Im Vorfeld der magnetischer Untersuchungen wurde der bestehende FMR-Aufbau um einen Messmodus erweitert, sodass Messungen bei fester Mikrowellenfrequenz und gleichzeitigem Durchfahren eines externen magnetischen Feldes möglich wurden. Weiterhin wurde ein Softwarepaket für die Datenauswertung entwickelt. Beginnend mit dem Morphologieeinfluss auf die magnetische Anisotropie wurden 10 nm dünne Fe, Co und Ni81Fe19 (Permalloy ≡ Py) Filme auf periodisch moduliertem Si abgeschieden. Durch Versetzungen während der Ionenstrahl-Erosion und Bildung einer natürlichen Oxidschicht bildet sich bei den verwendeten Substraten eine amorphe Oberfläche, was zu polykristallinem Schichtwachstum führt. Dadurch wird die magneto-kristalline Anisotropie unterdrückt und morphologie-induzierte Beiträge bestimmen die Anisotropie. Beobachtet wurde eine induzierte uniaxiale magnetische Anisotropie (UMA), deren leichte Richtung sich entlang der Ripple-Wellenzüge ausrichtet. Mittels schichtdickenabhängigen Messungen wurden zwei charakteristische Regionen mit konkurrierender uniaxialer Volumen- und Oberflächenanisotropie ermittelt. Dabei ist die Volumenkomponente im Bereich dünner Schichten vorherrschend und die magnetischen Momente richten sich entlang der Oberflächenmodulation aus. Für dickere Schichten ist die UMA dahingegen durch dipolare Streufelder bestimmt. Die experimentellen Funde werden in beiden Bereichen durch mikromagnetische Simulationen untermauert. Im Gegensatz zu erodiertem Si behält MgO seine Kristallstruktur, was epitaktisch gewachsene, einkristalline Fe-Schichten von 10 nm Dicke ermöglicht. Folglich wurde eine Überlagerung aus induzierter und kristalliner Anisotropie beobachtet. Dadurch, dass die Richtung der Ripple durch die Richtung des Ionenstrahls während der Erosion vorgegeben wird, lässt sich die UMA frei gegen die kristalline Anisotropie drehen, was wiederum Möglichkeiten zur gezielten Beeinflussung der Anisotropie bietet. Im Hinblick auf die dynamischen magnetischen Eigenschaften führen Ripple zu einer Verringerung der intrinsischen und extrinsischen Relaxationsbeiträge. Für den letzten Teil der Arbeit wurde 30 nm dünnes Py auf Si-Ripple gewachsen, wobei ein Wellenlängenbereich von λ = 27 nm bis 432 nm abgedeckt wurde. Mit Hilfe von magnetischer Kraftmikroskopie und Holographie wurden die dipolaren Streufelder über und in den Filmen untersucht. Ab λ ≥ 222 nm ermöglichen diese dipolaren Felder eine Streuung von Spinwellen, sodass Zwei-Magnonen-Streuung (TMS) auftritt. Dies führt zu einer scheinbaren Linienverbreiterung und äußert sich durch einzelne Peaks in der frequenzabhängigen Linienbreite. Letztere lassen sich in ihrer Frequenzposition durch die Wellenlänge des Substrates beeinflussen und können mittels einer kürzlich in der Literatur veröffentlichten Störungstheorie für Spinwellen in periodisch gestörten Filmen erklärt werden. Weiterhin wurde in der winkelabhängigen Linienbreite eine zweifache Symmetrie beobachtet, welche durch die TMS hervorgerufen wird und folglich nicht bei kleinen Wellenlängen zu beobachten ist
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Alameddine, Raged, and Sajad Dashtbozorg. "Utredning av för- och nackdelar med TN-S respektive TN-C system." Thesis, KTH, Data- och elektroteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183471.

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I denna rapport analyseras för- och nackdelar med eldistributionssystem av typ TN-C (fyrledarsystem) respektive TN-S (femledarsystem) system. Det finns olika uppfattningar om vilket system som är lämpligast att bygga ut i distributionsnätet (lågspänningsnätet) och i fastigheternas huvudledning. Med hjälp av litteraturstudier och kontakt med olika elföretag och elbolag har olika ståndpunkter diskuterats och därefter har en sammanställning av resultatet tagits fram. Enligt analysen är TN-C det lämpligaste alternativet att använda i distributionsnätet och TN-S bör användas i fastighetens huvudledning. Detta för att kunna uppnå en god och stabil elmiljö. Detta examensarbete skall underlätta val av teknik och förhoppningsvis öka kunskapen angående ämnet.
In this report analysis the advantages and disadvantages of the TN-C (four conductor system) and TN-S (five conductor system) system. There are different opinion about which system is most appropriate to use in the distribution network and the building main lines. With the help of literature studies and contacts with various power companies and electric companies different opinion have been discussed . TN-C is the most appropriate option in the distribution network and TN-S should be used in the building main lines. This for achieving high and stable electrical environment. This thesis will facilitate the choice of technology and hopefully increase the knowledge about the subject.
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Gallagher, Andrew Patrick. "Theoretical characterisation of magnetic force microscope tip stray fields." Thesis, University of Glasgow, 1999. http://theses.gla.ac.uk/4482/.

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Munro, Tommy. "The study of stray magnetic fields from digital recording heads for tape applications." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395108.

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Олексенко, Сергій Володимирович. "Оцінка показників лінійних електромеханічних перетворювачів ударної дії з високою магнітною сумісністю." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21227.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.01 – електричні машини та апарати. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2016. Дисертацію присвячено розробці комплексу науково-технічних рішень, спрямованих на оцінку показників лінійних електромеханічних перетворювачів ударної дії з високою магнітною сумісністю. Запропонована імітаційна математична модель лінійного електромеханічного перетворювача ударної дії, що описує взаємопов'язані просторово-часові електричні, магнітні, механічні та теплові процеси із змінними параметрами. Визначено геометричні параметри електропровідного якоря, феромагнітних осердя та екрана, при яких перетворювач забезпечує найбільші показники. Отримала подальший розвиток методика синтезу параметрів високоефективного лінійного електромеханічного перетворювача ударної дії, заснована на використанні комплексного критерію ефективності, який враховує основні показники при різних варіантах стратегії вибору. Встановлено, що кріогенне охолодження до температури рідкого азоту обмотки індуктора дозволяє збільшити ККД лінійних електромеханічних перетворювачів ударної дії в 1,6 раз, при охолодженні якоря – в 5 разів, а при одночасному їх охолодженні – в 11 разів. Розроблено конструктивні схеми лінійних електромеханічних перетворювачів ударної дії індукційно-електромагнітного типу ударної і ударно-поворотної дії. Розроблено методику експериментальних досліджень лінійних електромеханічних перетворювачів ударної дії з одночасним вимірюванням електричних і механічних показників.
The thesis for the degree of candidate of technical sciences, specialty 05.09.01 – electrical machinery and apparatus. – National technical university "Kharkiv polytechnic institute", Kharkіv, 2016. The thesis is devoted to development of complex scientific and technical solutions aimed at improving the efficiency linear electromechanical transducers with high magnetic compatibility. The proposed computer model linear electromechanical transducers with ferro-magnetic core, describing connected field-temporal electrical, magnetic, mechanical and thermal processes with variable parameters. The optimum form of section and parameters conductive anchor linear electromechanical transducers induction type. The influence of the configuration and geometrical parameters ferromagnetic core, ferromagnetic shield, electromagnetic shield and combined on screen indicators linear electromechanical transducers. Further developed methods of synthesis parameters highly linear electromechanical transducers, based on a comprehensive criteria. The effect of cryogenic cooling efficiency linear electromechanical transducers. Developed design schemes linear electromechanical transducers electromagnetic induction-type. The method of experimental studies linear electromechanical transducers simultaneous measurement of electrical and mechanical performance. Experimentally confirmed the basic theoretical training is shown linear electromechanical transducers efficiency.
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Олексенко, Сергей Владимирович. "Оценка показателей линейных электромеханических преобразователей ударного действия с высокой магнитной совместимостью." Thesis, НТУ "ХПИ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21235.

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Диссертация на соискание ученой степени кандидата технических наук по специальности 05.09.01 – электрические машины и аппараты. – Национальный технический университет "Харьковский политехнический институт", Харьков, 2016. Диссертация посвящена разработке комплекса научно-технических решений, направленных на оценку эффективности линейных электромеханических преобразователей ударного действия с высокой магнитной совместимости. На основе анализа научно-технических источников установлено, что линейные электромеханические преобразователи ударного действия широко при-меняются в ударно-силовых устройствах и для ускорения объектов до высоких скоростей. Однако КПД существующих линейных электромеханических преобразователей ударного действия находится на низком уровне. Кроме того, во время работы линейных электромеханических преобразователей ударного действия последние создают очень значительные импульсные магнитные поля рассеяния, которые резко негативно влияют на близко расположенное оборудование и экологическую чистоту для биологических объектов. Предложена имитационная математическая модель линейного электроме-ханического преобразователя ударного действия, описывающая взаимосвязанные пространственно-временные электрические, магнитные, механические и тепловые процессы с переменными параметрами. Определены геометрические параметры электропроводящего якоря, ферромагнитных сердечника и экрана, при которых преобразователь обеспечивает наибольшие показатели. Предложена конструкция комбинированного экрана, обеспечивающего снижение магнитных полей рассеяния до 4 раз по сравнению с ферромагнитным экраном.
The thesis for the degree of candidate of technical sciences, specialty 05.09.01 – electrical machinery and apparatus. – National technical university "Kharkiv polytechnic institute", Kharkіv, 2016. The thesis is devoted to development of complex scientific and technical solutions aimed at improving the efficiency linear electromechanical transducers with high magnetic compatibility. The proposed computer model linear electromechanical transducers with ferro-magnetic core, describing connected field-temporal electrical, magnetic, mechanical and thermal processes with variable parameters. The optimum form of section and parameters conductive anchor linear electromechanical transducers induction type. The influence of the configuration and geometrical parameters ferromagnetic core, ferromagnetic shield, electromagnetic shield and combined on screen indicators linear electromechanical transducers. Further developed methods of synthesis parameters highly linear electromechanical transducers, based on a comprehensive criteria. The effect of cryogenic cooling efficiency linear electromechanical transducers. Developed design schemes linear electromechanical transducers electromagnetic induction-type. The method of experimental studies linear electromechanical transducers simultaneous measurement of electrical and mechanical performance. Experimentally confirmed the basic theoretical training is shown linear electromechanical transducers efficiency.
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Books on the topic "Magnetic stray field"

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Martínez-Pérez, M. J., R. Kleiner, and D. Koelle. NanoSQUIDs Applied to the Investigation of Small Magnetic Systems. Edited by A. V. Narlikar. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198738169.013.19.

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This article discusses the use of nanoSQUIDs for investigating small magnetic systems. It begins with an overview of the basics of superconducting quantum interference devices, focusing on how a dc SQUID operates and the use of resistively and capacitively shunted junction model to describe the phase dynamics of Josephson junctions (JJs). It then considers the motivation for using nanoSQUIDs, along with the importance of their size and geometry. It also evaluates micro- and nanoSQUIDs made of various types of JJs including nanoSQUIDs based on sandwich-like junctions, constriction-like junctions, and proximized structures. After reviewing different nanoSQUID readout methods that can be used to directly sense the stray magnetic field created by a nanoscale magnetic sample, the article concludes by highlighting some of the practical constraints and challenges encountered in using nanoSQUID technology, including particle positioning with respect to the sensor’s surface.
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Book chapters on the topic "Magnetic stray field"

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Samoilenko, A. A., and K. Zick. "Stray-Field Imaging of Solids (STRAFI)." In 25th Congress Ampere on Magnetic Resonance and Related Phenomena, 92–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76072-3_44.

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McVitie, S., R. P. Ferrier, and W. A. P. Nicholson. "Absolute field strength determination of magnetic force microscope tip stray fields." In Electron Microscopy and Analysis 1997, 201–4. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003063056-52.

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Nolle, Eugen. "Determination of the Magnetic Stray Field with an Equivalent Source Model." In Process Modelling, 305–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60120-0_20.

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Saito, Koji, Yoshitoshi Saito, Peter J. McDonald, and John Godward. "A Stray Field Imaging Study of the Drying Process of Precasting Materials used in a Steel Making Converter." In Magnetic Resonance in Colloid and Interface Science, 393–402. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0534-0_34.

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Nunes, Teresa, Philippe Bodart, and Edward W. Randall. "The Hardening of Portland Cement Studied by 1H Stray-Field Imaging: Influence of Concentration and Evaporation Rate of Water." In Nuclear Magnetic Resonance Spectroscopy of Cement-Based Materials, 411–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-80432-8_35.

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Kim, Kyung Sook, Samjinn Choi, Gi Ja Lee, Dong Hyun Park, Jeong Hoon Park, Il Sung Jo, and Hun-Kuk Park. "Effects of Stray Field Distribution Generated by Magnetic Beads on Giant Magnetoresistance Sensor for Biochip Applications." In IFMBE Proceedings, 293–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14998-6_75.

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Gonschorek, Karl-Heinz, and Ralf Vick. "Magnetic Stray Fields." In Electromagnetic Compatibility for Device Design and System Integration, 321–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03290-5_13.

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Schepper, Willi, Hitoshi Kubota, and Günter Reiss. "Analysis of the Disturbing Influence of Stray Fields in Very Small MRAM Cells by Computer Simulation." In Nanostructured Magnetic Materials and Their Applications, 75–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-36872-8_5.

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Baraskar, Bharat G., Tulshidas C. Darvade, Rahul C. Kambale, Jungho Ryu, and Venkateswarlu Annapureddy. "Harvesting stray magnetic field for powering wireless sensors." In Ferroelectric Materials for Energy Harvesting and Storage, 249–78. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-08-102802-5.00008-x.

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Jiazhen, Xu, Jiang Yaozhou, and Zhang Qinxin. "COMPUTATION OF STRAY MAGNETIC FIELD AND DETECTABILITY OF MAGNETIC PARTICLE TESTING." In Non-Destructive Testing, 368–71. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-444-87450-4.50088-6.

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Conference papers on the topic "Magnetic stray field"

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Heyder, A., M. Tenner, A. Meyer, S. Abersfelder, and J. Franke. "Magnetic stray field measurement of magnetic specimen." In 2016 6th International Electric Drives Production Conference (EDPC). IEEE, 2016. http://dx.doi.org/10.1109/edpc.2016.7851348.

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Meijers, Peter, Apostolos Tsouvalas, and Andrei Metrikine. "MONITORING MONOPILE PENETRATION THROUGH MAGNETIC STRAY FIELD MEASUREMENTS." In XI International Conference on Structural Dynamics. Athens: EASD, 2020. http://dx.doi.org/10.47964/1120.9102.19534.

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Chang-young Lee, Yan Sun, Jeong-min Jo, Jin-ho Lee, and Young-jae Han. "Investigation on stray magnetic field of high speed maglev." In 2013 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2013. http://dx.doi.org/10.1109/icems.2013.6713232.

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Polischuk, V., L. Petrov, D. Slavov, V. Domelunksen, and G. Todorov. "Stray magnetic field influence on coherent population trapping resonances." In SPIE Proceedings, edited by Sergey N. Bagayev, Andrey Chikishev, Alexander Dmitriev, Martial Ducloy, Tony Heinz, Vladilen Letokhov, Alexander Shkurinov, and Hiroaki Takahashi. SPIE, 2006. http://dx.doi.org/10.1117/12.677961.

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Hsin-I Wu, Ji-Shiuan Chen, Yuan-Ron Ma, Yung Liou, and Yeong-Der Yao. "Surface magnetic ripples induced by a local stray field scanning magnetic tip." In INTERMAG Asia 2005: Digest of the IEEE International Magnetics Conference. IEEE, 2005. http://dx.doi.org/10.1109/intmag.2005.1464017.

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Kajiwara, Ken, Yasuhisa Oda, Atsushi Kasugai, Koji Takahashi, Noriyuki Kobayashi, Keishi Sakamoto, Darbos Caroline, and Mark Henderson. "Effect of the stray magnetic field on the gyrotrons for ITER." In 2009 34th International Conference on Infrared, Millimeter, and Terahertz Waves (IORMMW-THz 2009). IEEE, 2009. http://dx.doi.org/10.1109/icimw.2009.5324783.

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Xu, Changqing, Chidong Qiu, and Xinbo Wu. "Eccentricity faults diagnosis based on motor stray magnetic field signature analysis." In 2017 Chinese Automation Congress (CAC). IEEE, 2017. http://dx.doi.org/10.1109/cac.2017.8243776.

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Liu, Xuyang, Philip W. T. Pong, and Chunhua Liu. "Velocity measurement method for PMSMs through external stray magnetic field sensing." In 2017 IEEE SENSORS. IEEE, 2017. http://dx.doi.org/10.1109/icsens.2017.8233973.

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Yang, Haijun, and Zengyi Lu. "Analysis on near-field effect caused by stray magnetic field of integrated LLC transformer." In 2014 IEEE International Power Electronics and Application Conference and Exposition (PEAC). IEEE, 2014. http://dx.doi.org/10.1109/peac.2014.7038059.

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Wang, J., T. Recktenwald, U. Maisl, and U. Netzelmann. "Observation of magnetic structures under external fields by the photothermally modulated stray field technique." In PHOTOACOUSTIC AND PHOTOTHERMAL PHENOMENA. ASCE, 1999. http://dx.doi.org/10.1063/1.58088.

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Reports on the topic "Magnetic stray field"

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Frisch, J. Sensitivity to Nano-Tesla Scale Stary Magnetic Fields(LCC-0140). Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/827018.

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