Masters Theses

Abstract

"Application of fast switching amplifiers in power converters, and especially in power inverters, causes unwanted radiated emission, which is a consequence of common mode (CM) currents arising in feed wire bundles. Ferrite chokes are commonly used to suppress those CM currents by increasing the CM impedance of circuits without affecting the differential mode currents, which is important for undisturbed operation of the converters or inverters. Their effective impedance is the main design concern, and it is determined by the material intrinsic properties (permeability, permittivity) and geometry. The goal of this work is to analytically correlate the geometrical and material properties (permittivity and magnetic permeability) of a ferrite choke under test conditions with its extracted equivalent circuit parameters (resistance, inductance and capacitance) and complex impedance of the ferrite choke on a wire bundle. The identification of those above mentioned equivalent circuit parameters can help to identify the best combination of dimension-material properties to maximize the efficiency of ferrites for suppressing CM currents"--Abstract, page iii.

Advisor(s)

Koledintseva, Marina

Committee Member(s)

Beetner, Daryl G.
Drewniak, James L.

Department(s)

Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering

Sponsor(s)

University of L'Aquila (Italy)

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2009

Pagination

xi, 85 pages

Rights

© 2009 Andrea Orlando, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Electromagnetic fields -- Mathematical models
Ferrites (Magnetic materials)
Impedance (Electricity)
Magnetic materials -- Mathematical models

Thesis Number

T 9582

Print OCLC #

612443940

Electronic OCLC #

466444855

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