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Common-Mode Choke Coils Characterization
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| Author(s) |
Konstantin KOSTOV, Jorma KYYRÄ |
| Abstract |
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 π-equivalent circuits of a CM choke can be obtained using two- and four-port 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 charac-teristics were more complex than the CM ones. |
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| Filename: | 0921-epe2009-full-10554769.pdf |
| Filesize: | 437.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2010-01-27 by System |
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