An Active EMI Filter for Robust Integration in Medium and High-Power AC/DC Converters

IF 2 3区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Electromagnetic Compatibility Pub Date : 2024-11-01 DOI:10.1109/TEMC.2024.3481493

Stefan Tolle;Daniel Kübrich;Stephan Frei

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引用次数: 0

Abstract

The filters of power converter systems typically have to attenuate electromagnetic interference (EMI) to a very large degree. This makes them bulky and heavy. Active EMI filters (AEF) can reduce the filter size and weight. Feedforward (FF) AEF topologies are best suited for good stability at varying grid impedances. Until now, FF topologies were discussed only for low-power systems, where the parasitic behavior of the circuit elements can be controlled easily. This contribution introduces an FF-AEF design that can be used in medium and high power three-phase ac–dc converter systems with varying grid impedances without the need to redesign the AEF. To improve the performance, a second-order high-pass filter is added and a current source for injecting the compensation current is optimized for compensating the parasitic inductance of the injection capacitor. The improved AEF is tested and analyzed in a simple common mode test circuit and a complex bidirectional 16 kW ac–dc converter system. An attenuation of 30 dB between 60 kHz and 400 kHz and a maximum attenuation of more than 42 dB at 150 kHz has been achieved.

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用于中大功率 AC/DC 转换器稳健集成的有源 EMI 滤波器

功率变换器系统的滤波器通常需要在很大程度上衰减电磁干扰。这使得它们又大又重。有源EMI滤波器（AEF）可以减小滤波器的尺寸和重量。前馈（FF） AEF拓扑最适合在不同的栅极阻抗下具有良好的稳定性。到目前为止，FF拓扑只讨论了低功率系统，其中电路元件的寄生行为可以很容易地控制。该贡献介绍了一种FF-AEF设计，可用于具有不同电网阻抗的中大功率三相ac-dc转换器系统，而无需重新设计AEF。为了提高性能，增加了二阶高通滤波器，并优化了注入补偿电流的电流源，以补偿注入电容的寄生电感。在一个简单的共模测试电路和一个复杂的双向16kw交直流变换器系统中对改进后的AEF进行了测试和分析。在60千赫和400千赫之间的衰减为30分贝，在150千赫时的最大衰减超过42分贝。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Electromagnetic Compatibility 工程技术-电信学

CiteScore

4.80

自引率

19.00%

发文量

235

审稿时长

2.3 months

期刊介绍： IEEE Transactions on Electromagnetic Compatibility publishes original and significant contributions related to all disciplines of electromagnetic compatibility (EMC) and relevant methods to predict, assess and prevent electromagnetic interference (EMI) and increase device/product immunity. The scope of the publication includes, but is not limited to Electromagnetic Environments; Interference Control; EMC and EMI Modeling; High Power Electromagnetics; EMC Standards, Methods of EMC Measurements; Computational Electromagnetics and Signal and Power Integrity, as applied or directly related to Electromagnetic Compatibility problems; Transmission Lines; Electrostatic Discharge and Lightning Effects; EMC in Wireless and Optical Technologies; EMC in Printed Circuit Board and System Design.