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Currently, with the accelerated development of various electrical components owing to commercialization and technological development of electric vehicles (EVs), efforts are being made to improve product quality by solving electromagnetic interference (EMI) problems between components, thus making electromagnetic compatibility (EMC) tests essential. When quality problems occur, critical issues, such as development delays and increased costs, can occur. Therefore, in this study, we applied a simulation-based modeling method for passive EMI filters (primarily used in power circuits) to reduce EMI and predict conducted emissions (CE). We created 3D EM analysis models and equivalent circuit modeling of passive elements, such as multilayer ceramic chip capacitors (MLCC) and inductors that make up the EMI filter, and analyzed them through EM simulation after 3D modeling the printed circuit board (PCB) of the filter. The filter modeling results were compared with the measured transfer characteristics, with the accuracy of the modeling results evaluated using a feature-selective validation (FSV) method. The results showed excellent consistency (better than fair) from 10 kHz to 108 MHz, i.e., the automotive CE test frequency.
Rhee et al. (Wed,) studied this question.