Comparison of soft magnetic materials response to sinusoidal voltage and current excitation

dc.contributor.advisorWilder, Aleta T.en
dc.contributor.advisorPearce, John A., 1946-en
dc.creatorTatarchuk, John Jacoben
dc.date.accessioned2011-09-30T19:09:07Zen
dc.date.available2011-09-30T19:09:07Zen
dc.date.issued2011-08en
dc.date.submittedAugust 2011en
dc.date.updated2011-09-30T19:09:27Zen
dc.descriptiontexten
dc.description.abstractA pulse hysteresisgraph system was constructed capable outputting current source and voltages source waveforms. MATLAB scripts were created to analyze the collected data. Three toroidal samples of soft magnetic materials were prepared. Theoretical modeling was done to predict the variation of effective applied magnetic fields inside the toroids from ideal assumptions due to three effects: wire spacing, cylindrical spreading, and eddy current generated fields. Data was collected under sinusoidal voltage source and sinusoidal current source excitation at 1 kHz. Large differences in core loss were noted especially at higher field excitations. Core loss under sinusoidal current source excitation was found to always be greater than or equal to core loss under sinusoidal voltage source. Normal magnetization curves under sinusoidal current and voltage source excitation were also compared. Significant differences were apparent in the magnetization curves of one sample toroid, and slight differences noted in the curves of the other two samples. Eddy currents were offered as a primary mechanism for the difference in core loss between sinusoidal current source and sinusoidal voltage source. A formula to predict the relative eddy current losses to be expected from an arbitrary, periodic voltage waveform shape is given.en
dc.description.departmentElectrical and Computer Engineeringen
dc.format.mimetypeapplication/pdfen
dc.identifier.slug2152/ETD-UT-2011-08-4333en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2011-08-4333en
dc.language.isoengen
dc.subjectSinusoidal current sourceen
dc.subjectSinusoidal voltage sourceen
dc.subjectSoft magnetic materialsen
dc.subjectHysteresisgraphen
dc.subjectCore lossen
dc.subjectDynamic hysteresis loopen
dc.subjectNormal magnetization curveen
dc.titleComparison of soft magnetic materials response to sinusoidal voltage and current excitationen
dc.type.genrethesisen
thesis.degree.departmentElectrical and Computer Engineeringen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen

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