Journal ArticleDOI
RF equivalent circuit modeling of ferrite-core inductors and characterization of core materials
TLDR
In this article, the authors proposed a technique for extracting the equivalent circuit parameters of the inductor and determining the frequency-dependent effective rod permeability as well as the intrinsic permeability of the ferrite-core material.Abstract:
Ferrite-core inductors play an important role in electromagnetic noise suppression The radio-frequency (RF) equivalent circuit modeling of the inductor is very useful for characterizing the inductor and for noise filtering studies A technique is proposed for extracting the equivalent circuit parameters of the inductor and determining the frequency-dependent effective rod permeability as well as the intrinsic permeability of the ferrite-core material The equivalent series resistance, inductance, and the lumped shunt parasitic capacitance have been calculated versus frequency for a slug-type inductor and a toroidal-type inductor The effective rod permeability of the ferrite rod used in the slug-type inductor and the intrinsic permeability of the ferrite core used in the toroidal-type inductor have also been estimated as a function of frequency The calculated intrinsic permeability of the toroidal core agrees very well with that measured by the HP4291A RF Material Analyzer The proposed method is simple and accurate In addition, it provides an alternative way for characterizing ferrite cores at radio frequenciesread more
Citations
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Journal ArticleDOI
The Three-Phase Common-Mode Inductor: Modeling and Design Issues
TL;DR: This paper presents a comprehensive physical characterization and modeling of the three-phase common-mode (CM) inductors along with the equivalent circuits that are relevant for their design.
Journal ArticleDOI
Analytical Wideband Model of a Common-Mode Choke
TL;DR: In this article, an analytical model of a common-mode choke suitable for accurate calculation of the choke impedance over a wide frequency range is presented, which consists of lumped parameters (resistances, inductances, and capacitances) related to individual turns of the coils wound on the core.
Journal ArticleDOI
An Analytical Model for Inductively Coupled Implantable Biomedical Devices With Ferrite Rods
Paul Theilmann,Peter M. Asbeck +1 more
TL;DR: Using approximations applicable to near field coupled implants simplified expressions for the complex mutual inductance of coaxial aligned coils with and without a cylindrical ferrite rod are derived and used to investigate how ferrite size, permeability and loss affect the power available to the implant device.
Journal ArticleDOI
Self-Capacitance of Coupled Toroidal Inductors for EMI Filters
TL;DR: In this paper, the self-capacitance expression for single-layer coupled toroidal inductors is derived using a physics-based geometrical method, which requires information about the inductor geometry and material properties, such as dimensions of core, technique of winding, as well as diameter, thickness and permittivity of winding wire isolation.
Proceedings ArticleDOI
Electromagnetic Induction Attacks Against Embedded Systems
Jayaprakash Selvaraj,Gokcen Yilmaz Dayanikli,Neelam Prabhu Gaunkar,David Ware,Ryan M. Gerdes,Mani Mina +5 more
TL;DR: This work demonstrates that both input and output signals, analog and digital, can be remotely manipulated via the physical layer---thus bypassing traditional integrity mechanisms.
References
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Journal ArticleDOI
Self-capacitance of inductors
TL;DR: In this paper, a new method for predicting the stray capacitance of inductors is presented, which is based on an analytical approach and the physical structure of the inductors, where the inductor winding is partitioned into basic cells.
Journal ArticleDOI
A study on stray capacitance modeling of inductors by using the finite element method
Qin Yu,T.W. Holmes +1 more
TL;DR: In this paper, a method for modeling the distributed capacitance of inductors by the finite element method and a node-to-node lumped capacitance network has been proposed.
Journal ArticleDOI
Modelling winding losses in high-frequency power inductors
TL;DR: A high-frequency model of iron-powder-core inductors is studied, and theoretical results were in good agreement with those experimentally measured.