engleski

Improved Numerical Method for Skin Effect Computing of Conductors Having Rectangular Cross Sections

A procedure for numerical solution of skin effect integral equations is presented in this paper. The function of current density, in a conductor having rectangular cross-section, can be approximated by means of the finite functional series with basic functions which automatically satisfy wave equation. The unknown complex coefficients are determined by using least square method and iterative method. Differential evolution optimization algorithm is applied for minimization of error functional. This approach leads to a very accurate solution, even in the case when only two terms in current approximation are adopted, giving a considerable advantage over the existing results. Being that the electromagnetic field components depend on the current density derivation, the proposed method gives very accurate solution not only for current density distribution and resistance, but also for field components and for internal inductivity coefficients. Hybrid Boundary Elements Method is used to determine the current distribution in the cross sections of a group of conductors.

skin effect ; least square method ; iterative method ; differential evolution method ; hybrid boundary elements method

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