Characterization of MnZn ferrite materials and finite element method for MnZn ferrite core loss calculations

Simple item page
dc.contributor.authorHan, Pingen
dc.contributor.committeechairLee, Fred C.en
dc.contributor.committeememberChen, Dan Y.en
dc.contributor.committeememberBoroyevich, Dushanen
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:37:06Zen
dc.date.adate2009-06-08en
dc.date.available2014-03-14T21:37:06Zen
dc.date.issued1995-09-15en
dc.date.rdate2009-06-08en
dc.date.sdate2009-06-08en
dc.description.abstractThis work presents the method of calculating the core loss in ferrite cores by using a linear and sinusoidal finite element solver based on the material property data (the complex permeability, the dielectric constant, and the AC conductivity) measured in the laboratory. Due to the lack of published material data and fundamental test procedures, this work also demonstrates the measurement techniques of material data which are necessary for the finite element analysis (FEA) of the ferrite core loss. First, a linear mathematical model of the ferrite core loss is formulated to characterize the hysteresis loss and the eddy current loss. The magnetic properties (the real and the imaginary components of the complex permeability) and the electric properties (the dielectric constant and the conductivity) are required. Second, the experimental procedures of those four properties are first presented. Toroids with 1.1 OD/ID ratios are selected as samples to obtain the magnetic properties. It is illustrated that the hysteresis loss should be measured at the frequency of interest, instead of DC, due to its frequency-dependence. The electric property data of ferrites are collected by using a disk sample which forms a capacitor. The conductivity tested is frequency-dependent due to the combination of the dielectric loss and the DC conduction loss. Finally, core loss simulations for the sample toroid, an EE core, and an RMIO core are performed and compared with the measurements. The flux and loss distributions are demonstrated in the last two cores. The hot spots are identified from the field plots.en
dc.description.degreeMaster of Scienceen
dc.format.extentvii, 116 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06082009-170857en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06082009-170857/en
dc.identifier.urihttp://hdl.handle.net/10919/42895en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1995.H36.pdfen
dc.relation.isformatofOCLC# 34209977en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmeasurement techniquesen
dc.subject.lccLD5655.V855 1995.H36en
dc.titleCharacterization of MnZn ferrite materials and finite element method for MnZn ferrite core loss calculationsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V855_1995.H36.pdf
Size:
2.56 MB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses