Resonant Spiral Coil

Application ID: 117961


At the resonance frequency, the capacitive coupling between the turns causes the impedance of a coil to transition from inductive to capacitive. This application analyzes the resonance of a 5 turn spiral coil of copper equipped with a thin epoxy varnish insulation layer. The capacitive coupling through the thin varnish layer is modeled using a special boundary condition in 3D, thereby avoiding costly volumetric meshing. In the 2D axisymmetric model, a volumetric, swept mesh is used in the thin varnish layer.

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