Abstract：Due to the effect of crosstalk coupling, switching power supplies with input lines and output lines closely show that high frequency conducted noises in both lines couple seriously, and it goes against electromagnetic interference (EMI) filter design. The switching power supply with input and output lines on the same side is investigated. Based on multiconductor transmission lines (MTLs) theory and weak-coupling crosstalk model, common mode (CM) noise current propagation paths are analyzed. In addition, the crosstalk model and per-unit-length parameters between input and output lines are presented. Simulation and experiment results indicate the change of output line conducted noise may influence the test result of input line. One improvement method is proposed responsibly to conducted emission.
廉玉欣, 李浩昱, 吴建强, 杨世彦. 基于MTLs弱耦合串扰模型的开关电源传导发射[J]. 电工技术学报, 2010, 25(9): 1-7.
Lian Yuxin, Li Haoyu, Wu Jianqiang, Yang Shiyan. Conducted EMI of Switching Power Supply Based on MTLs Weak-Coupling Crosstalk Model. Transactions of China Electrotechnical Society, 2010, 25(9): 1-7.
[1] 孟进, 马伟明, 张磊, 等. 带整流桥输入级的开关电源差模干扰特性[J]. 电工技术学报, 2006, 21(8): 14-18. [2] 钱照明, 陈恒林. 电力电子装置电磁兼容研究最新进展[J]. 电工技术学报, 2007, 22(7): 1-11. [3] Paul C R. 电磁兼容导论[M]. 闻映红, 等译. 2版. 北京: 人民邮电出版社, 2007. [4] Ye Sheng, Liu Yanfei. A novel EMI filter design method for switching power supplies [J]. IEEE Transactions on Power Electronics, 2004, 19(6): 1668-1678. [5] Wang S, Lee F C, Odendaal W G. Improving the performance of boost PFC EMI filter[C]. APEC’03, 18th IEEE Annual, 2003, 1: 368-374. [6] 廉玉欣, 张东来. 一种简单的通信电源EMI滤波器的分析与设计[J]. 电力电子技术, 2005, 39(3): 54-56. [7] Song Qu, Dan Chen. Mixed-mode noise and its implications to filter design in offline switching power supplies[J]. IEEE Transactions on Power Electronics, 2002, 17(7): 502-507. [8] Wang S, Lee F C, Odendaal W G. Characterization and parasitic extraction of EMI filters using scattering parameters[J]. IEEE Transactions on Power Electronics, 2005, 20(2): 502-510. [9] Wang S, Lee F C, Odendaal W G. Controlling the parasitic parameters to improve EMI filter performance[C]. Proc. of IEEE APEC’04, 2004: 503-509. [10] Wang S, Lee F C, Odendaal W G. Improvement of EMI filter performance with parasitic coupling can- cellation[J]. IEEE Transactions on Power Electronics, 2005, 20(5): 1221-1228. [11] 陈恒林, 钱照明, Zeng Zhaohui, 等. 布局对EMI滤波器的性能影响的研究[J]. 电工技术学报, 2008, 23(8): 7-12. [12] Wang S, Wyk J D van, Lee F C. Effects of interactions between filter parasitics and power interconnects on EMI filter performance[J]. IEEE Transactions on Industrial Electronics, 2007, 54(6): 3344-3352. [13] Tomasz Ciamulski, Wojciech K Gwarek. On eliminating crosstalk within multiconductor trans- mission lines[J]. IEEE Microwave and Wireless Components Letters, 2004, 14(6): 298-300. [14] Orlandi A, Paul C R. An efficient characterization of interconnected multiconductor-transmission-line net- works[J]. IEEE Transactions on Microwave Theory and Techniques, 2004, 48(3): 466-470. [15] Paul C R. Solution of the transmission-line equations under the weak-coupling assumption[J]. IEEE Trans- actions on Electromagnetic Compatibility, 2002, 44(3): 413-423. [16] Tomasz Ciamulski, Wojciech K Gwarek. Coupling compensation concept applied to crosstalk cancelling in multiconductor transmission lines[J]. IEEE Transactions on Electromagnetic Compatibility, 2008, 50(2): 437-441.
2010, Vol. 25 
