Near-field coupling between EMC filter components

Abstract

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Evaluation of the Inductive Coupling between Equivalent Emission Sources of Components

“…The elements of [M] n, n are unitary in the diagonal and given by ( jωM kn /(r n + jωL n )) otherwise. The coefficients Q 10 and Q 20 can then be determined by (6), and ( 7) utilizing the set of currents in (9). This procedure was validated numerically and experimentally, and the results are presented in the following section.…”

“…The EMI is usually established in different ways, for zinstance, the near-field coupling between filter components [6][7][8][9] or the coupling between wires [10]. Each coupling phenomenon is thus best modeled by different mathematical models.…”

“…The near-field coupling between filter components can be well modeled by a methodology based on the multipole expansion, which represents the radiation emission in a spherical reference system (r, θ, ϕ) [6][7][8][9], whereas the coupling between wires is usually well modeled by the PEEC method [10].…”

N-Conductor Passive Circuit Modeling for Power Converter Current Prediction and EMI Aspect

“…Filter layout is taken into account and in some cases where the tracks are close to each other, coupling between them is also added using specified strip-line blocks. However, the coupling between components themselves and between components and tracks are not modeled but it might be possible to take them into account [37]. This is the real advantage of the measuring methods shown before (IA and VNA) where these types of couplings are taken into account without any additional effort.…”