Author: Christopher S. Biddlecombe
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Min Eig Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 36

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Author: National Aeronautics and Space Adm Nasa
Publisher:
ISBN: 9781728925547
Category :
Languages : en
Pages : 34

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Results of transient eddy current calculations are reported. For simplicity, a two-dimensional transverse magnetic field which is incident on an infinitely long conductor is considered. The conductor is assumed to be a good but not perfect conductor. The resulting problem is an interface initial boundary value problem with the boundary of the conductor being the interface. A finite difference method is used to march the solution explicitly in time. The method is shown. Treatment of appropriate radiation conditions is given special consideration. Results are validated with approximate analytic solutions. Two stringent test cases of high and low frequency incident waves are considered to validate the results. Lee, Min Eig and Hariharan, S. I. and Ida, Nathan Glenn Research Center NSF DMS-86-04047; RTOP 505-62-21...

Author: Rachid Touzani
Publisher: Springer Science & Business Media
ISBN: 9400702027
Category : Computers
Languages : en
Pages : 309

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This monograph addresses fundamental aspects of mathematical modeling and numerical solution methods of electromagnetic problems involving low frequencies, i.e. magnetostatic and eddy current problems which are rarely presented in the applied mathematics literature. In the first part, the authors introduce the mathematical models in a realistic context in view of their use for industrial applications. Several geometric configurations of electric conductors leading to different mathematical models are carefully derived and analyzed, and numerical methods for the solution of the obtained problems are given. Related issues such as convergence of the approximations and error estimates are discussed. The second part of the monograph presents various coupled problems that involve eddy current or magnetostatic problems, in particular magneto-hydrodynamic problems and magnetic shaping problems concerning the melt flow of electrically conducting metals, induction heating processes, inductively coupled plasmas and ferromagnetic screening modeling. The presentation of each model comes with numerical illustration from industrial applications.

Author: Mohammad Rawhi Alrawashdeh
Publisher:
ISBN: 9780438274266
Category : Electronic dissertations
Languages : en
Pages : 183

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Author: Richard L. Stoll
Publisher: Oxford University Press, USA
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 148

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Author: NA. Demerdash
Publisher:
ISBN:
Category : Characterization of materials
Languages : en
Pages : 26

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Two numerical analysis approaches for the determination of electromagnetic fields and induced eddy currents in nonmagnetic and magnetic metallic structures are presented. It is demonstrated how these techniques can best serve the purposes of nondestructive testing for material characterization etc. One method is based on instantaneous state-space or Crank-Nicolson discrete-time solution approaches, and is most suited for use with nonsinusoidal excitation wave forms and nonlinear materials. The other approach is based on a root mean square phasor concept and is best suited for sinusoidal excitation cases and linear nonmagnetic materials. Both methods are based on a magnetic vector potential formulation, and can be used in characterization of material conductivities and permeabilities. Results of application of the two methods to magnetic and nonmagnetic materials are reported.

Author: Akram Al-Droubi
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Sheppard J. Salon
Publisher: John Wiley & Sons
ISBN: 1119866715
Category : Science
Languages : en
Pages : 404

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EDDY CURRENTS Understand the theory of eddy currents with this essential reference Eddy currents are electrical current loops produced when a conductor passes through a magnetic field, or is otherwise subject to a change in magnetic field direction. These currents play a significant role in many industrial processes and areas of electrical engineering. Their properties and applications are therefore a subject of significant interest for electrical engineers and other professionals. Eddy Currents: Theory, Modeling and Applications offers a comprehensive reference on eddy currents in theory and practice. It begins with an introduction to the underlying theory of eddy currents, before proceeding to both closed-form and numerical solutions, and finally describing current and future applications. The result is an essential tool for anyone whose work requires an understanding of these ubiquitous currents. Eddy Currents readers will also find: Professional insights from an author team with decades of combined experience in research and industry Detailed treatment of methods including finite difference, finite element, and integral equation techniques Over 100 computer-generated figures to illustrate key points Eddy Currents is a must-have reference for researchers and industry professionals in electrical engineering and related fields.

Author: Neville Thomas Rowden
Publisher:
ISBN:
Category :
Languages : en
Pages : 458

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