Boundary conditions of variable magnetic field compensation for a thin ferromagnetic shell
Object and purpose of research. The purpose of this work was to formulate boundary conditions for density calculations of current sheet compensating low frequency magnetic field of ferromagnetic shell. Materials and methods. Numerical and analytical solution methods for boundary value problems of el...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Krylov State Research Centre
2019-08-01
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| Series: | Труды Крыловского государственного научного центра |
| Subjects: | |
| Online Access: | https://transactions-ksrc.ru/eng/archive/Boundary-conditions-of-variable-magnetic-field-compensation-for-a-thin-ferromagnetic-shell/ |
| Summary: | Object and purpose of research. The purpose of this work was to formulate boundary conditions for density calculations of current sheet compensating low frequency magnetic field of ferromagnetic shell. Materials and methods. Numerical and analytical solution methods for boundary value problems of electromagnetic field theory. Main results. This paper discusses external electromagnetic field compensation of a thin ferromagnetic conductive shell by means of the current sheet on its outer or inner side. For a closed shell, compensating current density is calculated through the solution of internal boundary value problem for a vector magnetic potential with Dirichlet or third kind boundary conditions. Conclusion. The results of this work could be used in development of degaussing device for compensation of the eddy current-induced magnetic field during ship roll. Compensating current must be adjusted with respect to three parameters: Earth magnetic field in ship-axes coordinate system, and two time derivatives of the external field (the first and the second). |
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| ISSN: | 2542-2324 2618-8244 |