A Lumped-Element Circuit Model of Ferrite Chokes

Abstract

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.

Meeting Name

2010 IEEE International Symposium on Electromagnetic Compatibility, EMC 2010 (2010: Jul. 25-30, Fort Lauderdale, FL)

Department(s)

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)

978-1-4244-6305-3

International Standard Serial Number (ISSN)

2158-110X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2010

Link to Full Text

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