An active EMI filtering technique for improving passive filter low-frequency performance

作者：Chen WJ^*; Yang X; Wang ZA

来源：IEEE Transactions on Electromagnetic Compatibility, 2006, 48(1): 172-177.

DOI：10.1109/TEMC.2006.870803

• active filters
• current transformers
• electromagnetic interference (EMI)
• passive filters

In recent years, there has been considerable interest in the development and applications of active electromagnetic interference (EMI) filters. An active EMI filter (AEF) for integrated power electronics module (IPEM) is proposed in this paper, where large passive EMI filter is replaced by small passive components and active op-amp circuit. The technique is appropriated when improved attenuation is required at relatively low frequencies and the high-frequency filtering requirements are easily met. The effectiveness of the proposed circuit has been verified by experimental results. It is demonstrated that the proposed approach is most effective in a case where it is desirable to minimize the amount of passive components in the filter.

• 出版日期2006-2
• 单位西安交通大学