Time Domain Simulation of Common Mode Ferrite Chokes at System Level

• Published in: IEEE transactions on electromagnetic compatibility Vol. 65; no. 6; pp. 1900 - 1908
• Main Authors: Bravo, Alberto Gascon, Garcia, Salvador G., Manterola, Alejandro Munoz, Anon-Cancela, Manuel, Moreno, Roberto, Tekbas, Kenan, Angulo, Luis D.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-12-2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Cables; Chokes (restrictions); Common mode (CM) chokes; complex permeability; Crosstalk; Electromagnetic compatibility; ferrite; Ferrite beads; Ferrites; Finite difference method; Finite difference methods; Finite difference time domain method; finite differences time domain; Finite element method; finite element method (FEM); Impedance; Inductors; Material properties; Mathematical models; multitransmission lines; Parameters; Permeability; Three dimensional models; Time-domain analysis; Transmission lines
• ISSN: 0018-9375; 1558-187X
• DOI: 10.1109/TEMC.2023.3309698

This article introduces a comprehensive methodology for analyzing common-mode (CM) ferrite chokes in time-domain (TD) methods, employing lumped dispersive loads, and validates it through a typical test setup for cable crosstalk assessment. The analysis begins with the experimental characterization of CM choke material properties using a coaxial line fixture to obtain its constitutive parameters. Subsequently, a simplified lumped dispersive convolutional model is obtained, representing the impedance of the ferrite when placed on a location on the cable. The first approach adopts a multiconductor transmission line (MTL) model for the cables, solving them by a finite-difference (FDTD) space-time scheme. The second approach utilizes the classical full-wave Yee-FDTD method in conjunction with the thin-wire Holland model for cables. The accuracy of the proposed methods is evaluated by comparing simulations performed with MTL-FDTD and Holland-Yee FDTD, to experimental measurements, and results obtained with the the frequency-domain finite element method using a 3-D model of the ferrite with its constitutive parameters. Finally, the validity and performance of the methodologies are critically discussed.