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Lecturer(s)
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Eichler Jakub, Ing. Ph.D.
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Novák Miroslav, Ing. Ph.D.
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Course content
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Lectures: 1. Basic laws of magnetism: Maxwell's equations, Ampere's law 2. Stokes theorem, Biot-Savart-Laplace law, topological properties of the magnetic field strength of the magnetic field - Lorentz force 3. The magnetic properties of the atom, the magnetic field in the environment, magnetization, polarization, diamagnetic and paramagnetic 4. Ferromagnetic and ferrimagnetic substances, domain structure, domain wall movement, and its properties, the energy balance of the crystal ferromagnetic substance 5. Macroscopic manifestations of ferromagnetic materials - magnetization loop, description, measurements on closed and open samples 6. Magnetically soft materials - properties, use; permanent magnets - types, use 7. Mathematical models of hysteresis - Jiles-Atherton, Preisach model 8. Linear magnetic circuits - Hopkinsn law, inductance of linear discrete circuit, the induced voltage, solving of nonlinear mag. circuits, energy balance 9. Solenoid, the force in the air gap, the electromagnet proposal 10. Ferromagnetic materials for storage media Seminars: Introduction practicing vector calculus; practicing basic laws of examples; training in the use of FEM calculations in magnetism (FEMM); Simulation of simple cases; individual simulations assigned tasks; measuring the magnetization loop of soft magnetic material; evaluation of the measured data; application of models of hysteresis model set by previous measurements; proposal transformer optimization; proposal chokes for switching power supply; compared to operating forces of the electromagnet and permanent magnet
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Learning activities and teaching methods
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Monological explanation (lecture, presentation,briefing), Self-study (text study, reading, problematic tasks, practical tasks, experiments, research, written assignments), Written assignment presentation and defence, Laboratory work
- Preparation for credit
- 20 hours per semester
- Class attendance
- 40 hours per semester
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Learning outcomes
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Subject approaching students nature of magnetism behavior in substances in the magnetic field focusing on the ferromagnetic substance. The aim is to understand the nature, design methods and presentation of the basic technical applications magnetically soft and hard materials.
Students get an overview on the properties, design and engineering applications of magnetic materials. Students will understand the physical nature of phenomena and learn about the methods of computer modeling of hysteresis and magnetic system design.
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Prerequisites
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We assume knowledge of electrical engineering
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Assessment methods and criteria
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Combined examination, Presentation of student research activity
Credit: Participation on seminars, individual project elaboration and defense. Sharing of project parts is flagrant violation of study rules.
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Recommended literature
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Bertotti, G., Mayergoyz, I. The science of hysteresis. Vol. 1, 2 and 3. Elsevier, 2006. ISBN 978-0-2-369431-7.
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Campbell P. Permanent Magnet materials and their Application. New York: Cambridge University Press, 1994. ISBN 0-521-56688-6.
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Hajko V., Potocký L., Zentko A. Magnetizačné procesy. Bratislava, Alfa, 1982.
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Jiles D. Introduction to magnetism and magnetic materials. London: Chapman & Hall, 1991. ISBN 0-412-38640-2.
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Landay L. D., Lifshnitz E. M. The Classical Theory of Fields. London, 1980. ISBN 978-0750627689.
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Morrish A. The physical principles of magnetism. New York: IEEE Press, 2001. ISBN 0-7803-6029-X.
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Patočka M. Magnetické jevy a obvody ve výkonové elektronice, měřicí technice a silnoproudé elektrotechnice. Brno: VUTIUM, 2011. ISBN 978-80-214-4003-6.
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