A Lumped-Element Circuit Model of Ferrite Chokes
An RLC model of ferrite chokes for suppressing common-mode (CM) currents is presented. The equivalent lumped-element circuit parameters are obtained from the frequency-dependent input impedance of a ferrite choke on a wire above the ground plane. This input impedance can be either measured (using vector network analyzer or impedance analyzer), or numerically modeled based on the known ferrite material properties (permittivity and permeability). An example of using both numerical modeling and measurements is provided. Results show good agreement at comparatively low frequencies (below 200 MHz). The upper frequency limit for the proposed equivalent lumped-circuit model is discussed.
A. Orlando et al., "A Lumped-Element Circuit Model of Ferrite Chokes," Proceedings of the 2010 IEEE International Symposium on Electromagnetic Compatibility (2010, Fort Lauderdale, FL), pp. 754 - 759, Institute of Electrical and Electronics Engineers (IEEE), Jan 2010.
The definitive version is available at https://doi.org/10.1109/ISEMC.2010.5711373
2010 IEEE International Symposium on Electromagnetic Compatibility, EMC 2010 (2010: Jul. 25-30, Fort Lauderdale, FL)
Electrical and Computer Engineering
Keywords and Phrases
Electric Impedance; Electric Impedance Measurement; Electric Network Analysis; Electric Network Analyzers; Electromagnetic Compatibility; Electromagnetism; Ferrite
International Standard Book Number (ISBN)
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Article - Conference proceedings
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01 Jan 2010