BEM Computation of the Internal Impedance of Air-Core Inductors Enforcing High-order Surface Impedance Boundary Conditions
2021
The internal impedance of an axisymmetric air-core inductor is computed by the Boundary Element Method (BEM) coupled with high-order surface impedance boundary conditions (SIBCs), which considers the curvature of the cross-sections of the conductors. The proposed method is based on the Perturbation Technique (PT) and provides accurate results in a wide frequency range by solving only once the BEM formulation. A flat spiral air-core inductor is considered as a test case and the Finite Element Method (FEM) without SIBC is used to obtain the reference results.
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