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dc.contributor.advisorAskew, Thomas R., 1955-
dc.contributor.advisorHull, John R
dc.contributor.advisor
dc.contributor.advisorMulcahy, Thomas M.
dc.contributor.authorPipik, Shannon F.
dc.date.accessioned2011-08-23T12:36:17Z
dc.date.available2011-08-23T12:36:17Z
dc.date.issued1995
dc.identifier.urihttp://hdl.handle.net/10920/23297
dc.descriptionvi, 37 p.en_US
dc.description.abstractSuperconducting magnetic bearings are being used in energy storage systems because they have little to no frictional losses, and therefore have high energy storage efficiencies. Any frictional losses that do occur are mostly due to inhomogeneities in the magnetic field of the permanent magnets in the superconducting magnetic bearing. The magnetic field of the permanent magnets used as rotors in the magnetic bearings must therefore be examined for any inhomogeneities, which could cause frictional losses and instabilities in the system The magnetic fields of the two permanent magnet rotors that are to be used in the Flywheel Energy Storage system at Argonne National Laboratory were examined in detail for any inhomogeneities. In order for the magnet to have low frictional losses and low instabilities, the inhomogeneities need to be less than 10% of the total magnetic field of the rotor magnet. The first rotor magnet examined, Rotor A, had magnetic field inhomogeneities of 14-17% of its total magnetic field. In addition, the inhomogeneities showed extreme dependence on the locations of the seams between the magnet pieces. This clearly exceeded the expected amount of inhomogeneities, and it was decided to manufacture a second rotor magnet, B. Rotor B Magnet had magnetic field inhomogeneities of 4-6% of its total magnetic field. Although the inhomogeneities were dependent upon the positions of the seams between the magnets, even the largest local inhomogeneity was only 6% of the total magnetic field. Thus Rotor B Magnet's field was within the allowable inhomogeneity margins for the permanent magnet rotors to be used in the Flywheel Energy Storage system.en_US
dc.description.sponsorshipArgonne National Laboratory, Argonne, IL
dc.description.sponsorshipArgonne National Laboratory, Argonne, IL
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.relation.ispartofKalamazoo College Physics Senior Individualized Projects Collection
dc.relation.ispartofseriesSenior Individualized Projects. Physics.;
dc.rightsU.S. copyright laws protect this material. Commercial use or distribution of this material is not permitted without prior written permission of the copyright holder. All rights reserved.
dc.titleCharacterization and Analysis of Magnetic Fields of Multiple Piece Levitation Magnets used in Flywheel Energy Storage Systemsen_US
dc.typeThesisen_US
KCollege.Access.ContactIf you are not a current Kalamazoo College student, faculty, or staff member, email dspace@kzoo.edu to request access to this thesis.


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  • Physics Senior Individualized Projects [322]
    This collection includes Senior Individualized Projects (SIP's) completed in the Physics Department. Abstracts are generally available to the public, but PDF files are available only to current Kalamazoo College students, faculty, and staff.

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