Performance of electromagnetic interference (EMI) filters in power-electronics applications is limited by the parasitic coupling between the components of the filters and the self-parasitic of each component. While these parasitic effects can be partially taken into account on the circuit level, it is difficult to estimate their values. In this article, a full-wave modeling methodology is proposed to predict the performance of a complete EMI filter up to 1 GHz. Following the proposed methodology, the mutual couplings among the EMI filter components are taken into account as well as the self-parasitics of each individual component. Experiments and simulations are carried out to validate the modeling methodology. A self-parasitic cancellation technique is also applied to demonstrate the benefits of three-dimensional modeling methodology in EMI filter design.

中文翻译：

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EMI 滤波器的建模策略

电力电子应用中电磁干扰 (EMI) 滤波器的性能受到滤波器组件之间的寄生耦合和每个组件的自寄生的限制。虽然这些寄生效应可以在电路层面部分考虑，但很难估计它们的值。在本文中，提出了一种全波建模方法来预测高达 1 GHz 的完整 EMI 滤波器的性能。按照建议的方法，EMI 滤波器组件之间的相互耦合以及每个单独组件的自寄生都被考虑在内。进行了实验和模拟以验证建模方法。