Design and Implementation of an Active EMI Filter for Common-Mode Noise Reduction

This paper presents the analysis and design of an active electromagnetic interference (EMI) filter (AEF) for the common-mode (CM) noise reduction of switching power converters. The features of the several types of AEFs are discussed and compared in terms of implementation. The feed-forward AEF with a voltage-sensing and voltage-cancellation (VSVC) structure is implemented for an LLC resonant converter to replace a multiple-stage passive EMI filter and thereby reduce CM noise. The characteristics and performance of the VSVC-type AEF are investigated through theoretical and experimental works.

[1]  Seung-Ki Sul,et al.  A new active common-mode EMI filter for PWM inverter , 2003 .

[2]  Yang Xu,et al.  Design and Evaluation of an Input Active EMI Filter for Integrated Power Electronics Modules , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[3]  Kye Yak See,et al.  Measurement of noise source impedance of SMPS using a two probes approach , 2004, IEEE Transactions on Power Electronics.

[4]  Weiping Zhang,et al.  An Experimental Study of Common- and Differential-Mode Active EMI Filter Compensation Characteristics , 2009, IEEE Transactions on Electromagnetic Compatibility.

[5]  Deng Wei,et al.  Design of active EMI filter based on virtual impedance transform method , 2013, 2013 2nd International Symposium on Instrumentation and Measurement, Sensor Network and Automation (IMSNA).

[6]  Mohamad Sawan,et al.  Suppression of common-mode input electromagnetic interference noise in DC–DC converters using the active filtering method , 2011 .

[7]  Kye Yak See,et al.  Measurement of noise source impedance of SMPS using a two probes approach , 2004 .

[8]  P.K. Jain,et al.  Conducted EMI noise mitigation in DC-DC converters using active filtering method , 2008, 2008 IEEE Power Electronics Specialists Conference.

[9]  Zhaoan Wang,et al.  An active EMI filtering technique for improving passive filter low-frequency performance , 2006, IEEE Transactions on Electromagnetic Compatibility.

[10]  F. Costa,et al.  Integrated Active Filter for Differential-Mode Noise Suppression , 2014, IEEE Transactions on Power Electronics.

[11]  Laszlo Tihanyi.  Electromagnetic Compatibility in Power Electronics , 1995 .

[12]  Johann W. Kolar,et al.  Implementation of a Transformerless Common-Mode Active Filter for Offline Converter Systems , 2010, IEEE Transactions on Industrial Electronics.