Temat: magnetostatic - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Magnetostatic analysis of a pinch mode magnetorheological valve
Autorzy:: Gołdasz, J.
Sapiński, B.
Powiązania:: https://bibliotekanauki.pl/articles/386794.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: MR fluid
pinch mode
valve
magnetostatic model
Opis:: The study deals with the pinch mode of magnetorheological (MR) fluids’ operation and its application in MR valves. By applying the principle in MR valves a highly non-uniform magnetic field can be generated in flow channels in such a way to solidify the portion of the material that is the nearest to the flow channel’s walls. This is in contrary to well-known MR flow mode valves. The authors investigate a basic pinch mode valve in several fundamental configurations, and then examine their magnetic circuits through magnetostatic finiteelement (FE) analysis. Flux density contour maps are revealed and basic performance figures calculated and analysed. The FE analysis results yield confidence in that the performance of MR pinch mode devices can be effectively controlled through electromagnetic means.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 3; 229-232
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The method of moments in Jiles–Atherton model based magnetostatic modelling of thin layers
Autorzy:: Szewczyk, R.
Powiązania:: https://bibliotekanauki.pl/articles/140580.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Jiles–Atherton model
magnetostatic
thin layers
method of moments
Opis:: The method of moments enables effective magnetostatic modelling of thin layers, where thickness of the layer should be considered. This paper presents the non-linear extension for this method of modelling. An initial magnetization curve, necessary for modelling, was reconstructed from saturation hysteresis loops on the basis of the Jiles–Atherton model. Finally, the set of non-linear equations was stated, and an example of solution for a square-shaped magnetic thin layer is presented.
Źródło:: Archives of Electrical Engineering; 2018, 67, 1; 27-35
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Mössbauer study of the Heusler-type Fe2MAl compounds for M = V, Cr, Fe, Co, Ni
Autorzy:: Popiel, E.
Zarek, W.
Tuszyński, M.
Powiązania:: https://bibliotekanauki.pl/articles/147224.pdf
Data publikacji:: 2004
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: Heusler alloys
Mössbauer spectroscopy
site preference
magnetostatic measurements
Opis:: The crystal structure and magnetic properties of Fe2MAl compounds for M = V, Cr, Fe, Co and Ni were investigated by X-ray, magnetostatic and Mössbauer effect methods. It was found that the investigated compounds possess not perfectly ordered fcc structure of the L21-type. With increasing number of 3d electrons of M component the transition from the paramagnetic to ferromagnetic behaviour follows. Mössbauer spectra were analysed by a hyperfine field distribution method. They are characterictic of the ferromagnetic phase for M = Fe, Co and Ni and indicated the early observed preference of these atoms for the Fe sites.
Źródło:: Nukleonika; 2004, 49,suppl.3; 49-52
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Novel optimization method for mobile magnetostatic shield and test applications
Autorzy:: Ralf, Patrick Alexander
Kreischer, Christian
Powiązania:: https://bibliotekanauki.pl/articles/2135737.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: differential evolution
evolutionary algorithm
magnetostatic passive shielding
mobile application
optimization
spherical shells
Opis:: This article provides an optimized solution to the problem of passive shielding against static magnetic fields with any number of spherical shells. It is known, that the shielding factor of a layered structure increases in contrast to a single shell with the same overall thickness. For the reduction of weight and cost by given material parameters and available space the best system for the layer positions has to be found. Because classic magnetically shielded rooms are very heavy, this system will be used to develop a transportable Zero-Gauss-Chamber. To handle this problem, a new way was developed, in which for the first time the solution with regard to shielding and weight was optimized. Therefore, a solution for the most general case of spherical shells was chosen with an adapted boundary condition. This solution was expanded to an arbitrary number of layers and permeabilities. With this analytic solution a differential evolution algorithm is able to find the best partition of the shells. These optimized solutions are verified by numerical solutions made by the Finite Element Method (FEM). After that the solutions of different raw data are determined and investigated.
Źródło:: Archives of Electrical Engineering; 2022, 71, 3; 627--639
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Solution of some problems of single-scale wavelet transform processor using a magnetostatic surface wave device
Autorzy:: Lu, W.
Kuang, L.
Lü, X.
Zhu, C.
Zhang, T.
Zhang, J.
Powiązania:: https://bibliotekanauki.pl/articles/221174.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: wavelet transform processor
magnetostatic surface wave (MSSW)
interdigital transducer
direct coupling
insertion loss
Opis:: In this paper, we investigate the implementation schemes of a single-scale wavelet transform processor using magnetostatic surface wave (MSSW) devices. There are three implementation schemes: the interdigital transducer, the meander line transducer and the grating transducer. Because the interdigital transducer has excellent properties, namely, good frequency characteristic and low insertion loss, we use the interdigital transducer as the implementation scheme of a single-scale wavelet transform processor using MSSW device. In the paper, we also present the solutions to the three key problems: the direct coupling between the input transducer and the output transducer, the insertion loss, and the loss characteristics of the gyromagnetic film having an influence on the wavelet transform processor. There are two methods of reducing the direct coupling between the input transducer and the output transducer: increasing the distance between the input transducer and the output transducer, and placing a metal "wall" between the input transducer and the output transducer. There also are two methods of reducing the insertion loss of a single-scale wavelet transform processor using a MSSW device for scale: the appropriate thickness of the yttrium iron garnet (YIG) film and the uniform magnetic field. The smaller the ferromagnetic resonance linewidth of the gyromagnetic film, the smaller the magnetostatic wave propagation loss.
Źródło:: Metrology and Measurement Systems; 2012, 19, 4; 685-692
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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