A Design Method for the Asymmetric Artificial Network With an Asymmetrical Transformer

作者：Hirasawa Norihito^*; Akiyama Yoshiharu; Amemiya Fujio; Sugiura Akira; Kami Yoshio

来源：IEEE Transactions on Electromagnetic Compatibility, 2014, 56(4): 903-911.

DOI：10.1109/TEMC.2013.2292902

• Asymmetric artificial network (AAN)
• asymmetric disturbance current
• common-mode impedance
• electromagnetic interference (EMI) test
• longitudinal conversion loss (LCL)

Conducted asymmetric disturbances are measured at telecommunication ports of equipment under test using an asymmetric artificial network (AAN). Therefore, theoretical investigations are carried out to characterize an AAN with a mode-impedance matrix, introducing the common-mode and differential-mode impedances. By referring to this matrix, a theoretical design method is developed for the AAN with an asymmetrical transformer to satisfy the requirements for the mode impedances and the longitudinal conversion loss. By using this design method, two different prototype AANs are assembled: one meets the CISPR 22 specifications, and the other is used in power line telecommunication modem tests. A detailed experimental examination of the assembled AANs validates the proposed theoretical design method.

• 出版日期2014-8