Title :
An Experimental Study of Common- and Differential-Mode Active EMI Filter Compensation Characteristics
Author :
Chen, Wenjie ; Zhang, Weiping ; Yang, Xu ; Sheng, Zhiyong ; Wang, Zhaoan
Author_Institution :
Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xi´´an, China
Abstract :
Most reported compensation schemes for active electromagnetic interference filters (AEFs) use either voltage canceling or current canceling to deal with high-frequency noise interference. The purpose of this paper is to investigate the compensation characteristics of these two kinds of AEFs for different types of noise sources, i.e., common mode (CM) and differential mode (DM) noise source. This is examined by experimental identification and theoretical analysis of the insertion losses of AEF with voltage- or current-cancellation scheme. It is demonstrated that current-canceling AEFs are effective in eliminating high-impedance CM noise, while voltage-canceling AEFs are good compensation solutions for low-impedance DM noise. The results reported in the paper enable the choice of optimized compensation schemes, using the aforementioned indicated aspects.
Keywords :
active filters; electromagnetic compatibility; active electromagnetic interference filters; common mode noise source; compensation schemes; compensation solutions; current canceling; current-canceling AEF; differential mode noise source; high-frequency noise interference; high-impedance CM noise; insertion losses; low-impedance DM noise; voltage canceling; Active filters; Active noise reduction; Attenuation; Circuit noise; Delta modulation; Electromagnetic interference; Interference cancellation; Noise cancellation; Passive filters; Voltage; Active filter; common mode (CM); differential mode (DM); electromagnetic interference (EMI); insertion loss; noise impedance;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
DOI :
10.1109/TEMC.2009.2021258
