Common-mode choke coils characterization

Konstantin Kostov*, Jorma Kyyrä

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

7 Citations (Scopus)


Common-mode (CM) chokes are four-terminal devices with different CM and differential-mode (DM) characteristics. The paper reviews the models for two- and four-terminal inductors and presents two methods to obtain the CM and DM characteristics of four-terminal devices. More specifically, it shows how the insertion loss and ?-equivalent circuits of a CM choke can be obtained using two- and fourport network parameters. However, these characterization methods are applicable not only to CM chokes, but to any four-terminal component or network, such as single-phase power filters. The results show that second order linear circuit models cannot describe accurately the CM and DM characteristics of a CM choke over a wide frequency range. For the studied example, the DM characteristics were more complex than the CM ones.

Original languageEnglish
Title of host publication2009 13th European Conference on Power Electronics and Applications, EPE '09
Number of pages9
Publication statusPublished - 2009
MoE publication typeA4 Article in a conference publication
EventEuropean Conference on Power Electronics and Applications - Barcelona, Spain
Duration: 8 Sep 200910 Sep 2009
Conference number: 13


ConferenceEuropean Conference on Power Electronics and Applications
Abbreviated titleEPE


  • Measurement
  • Passive component
  • Passive filter


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