Title :
Performance of the Impedance Boundary Conditions for Eddy-Current Problems
Author :
Jayasekera, K.A.S.N. ; Ciric, I.R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man.
Abstract :
Impedance boundary conditions are used to derive approximate expressions for the magnetic vector potential, field quantities, Joule losses and forces for conducting spheroids in the presence of circular turns carrying sinusoidal with time currents. Numerical results are generated to determine, by comparison with the results obtained applying the exact boundary conditions, the improvement achieved with the surface impedance model with respect to the simpler perfect conductor model and the range of validity of these models. The study performed is useful for evaluating various approximate numerical solutions for real world conductors
Keywords :
approximation theory; conducting materials; eddy currents; magnetic fields; Joule losses; conducting spheroids; eddy-current problems; field quantities; impedance boundary conditions; magnetic vector potential; real world conductors; surface impedance model; Boundary conditions; Coaxial components; Conducting materials; Conductors; Frequency; Magnetic analysis; Magnetic fields; Performance evaluation; Skin; Surface impedance;
Conference_Titel :
Electromagnetic Field Computation, 2006 12th Biennial IEEE Conference on
Conference_Location :
Miami, FL
Print_ISBN :
1-4244-0320-0
DOI :
10.1109/CEFC-06.2006.1633158
