{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/97723"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/97723","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"AC loss in MgB2-based fully superconducting electric machines","abstract":"Superconducting electric machines have shown potential for dramatic increases in specific power for applications such as offshore wind generation, turbo-electric distributed propulsion in aircraft, and ship propulsion. Superconductors exhibit zero loss in dc conditions, though ac current produces considerable loss due to hysteresis, eddy currents, and coupling. For this reason, many present designs for such machines are partially superconducting, meaning that the dc field components are superconducting while the ac armature coils are normal copper conductors. A fully superconducting machine would involve both superconducting field and armature components for higher specific power, though this would introduce the previously mentioned ac losses. This research aims to characterize the expected losses in the components of fully superconducting machines based on partially superconducting designs described in prior work. Various factors are examined, such as motor geometry and operating frequency, and two low-loss designs are proposed based on the analysis.","abstract_html":"Superconducting electric machines have shown potential for dramatic increases in specific power for applications such as offshore wind generation, turbo-electric distributed propulsion in aircraft, and ship propulsion. Superconductors exhibit zero loss in dc conditions, though ac current produces considerable loss due to hysteresis, eddy currents, and coupling. For this reason, many present designs for such machines are partially superconducting, meaning that the dc field components are superconducting while the ac armature coils are normal copper conductors. A fully superconducting machine would involve both superconducting field and armature components for higher specific power, though this would introduce the previously mentioned ac losses. This research aims to characterize the expected losses in the components of fully superconducting machines based on partially superconducting designs described in prior work. Various factors are examined, such as motor geometry and operating frequency, and two low-loss designs are proposed based on the analysis.","abstract_has_math":false,"creators":["Feddersen, Matthew T"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Haran, Kiruba S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-08-10T20:33:03Z","date_published":"2017-08-10T20:33:03Z","updated_at":"2026-07-22T22:24:34Z","subjects":["Electric machines","Motor","Generator","Superconducting","AC loss","MgB2"],"languages":["en"],"rights":["Copyright 2017 Matthew Feddersen"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/97723","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Haran, Kiruba S."]},{"key":"dc:creator","label":"Author","values":["Feddersen, Matthew T"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2017-08-10T20:33:03Z","2019-08-11T09:15:32Z","2017-04-24","2017-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Electric machines","Motor","Generator","Superconducting","AC loss","MgB2"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Matthew Feddersen"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/97723"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Superconducting electric machines have shown potential for dramatic increases in specific power for applications such as offshore wind generation, turbo-electric distributed propulsion in aircraft, and ship propulsion. Superconductors exhibit zero loss in dc conditions, though ac current produces considerable loss due to hysteresis, eddy currents, and coupling. For this reason, many present designs for such machines are partially superconducting, meaning that the dc field components are superconducting while the ac armature coils are normal copper conductors. A fully superconducting machine would involve both superconducting field and armature components for higher specific power, though this would introduce the previously mentioned ac losses. This research aims to characterize the expected losses in the components of fully superconducting machines based on partially superconducting designs described in prior work. Various factors are examined, such as motor geometry and operating frequency, and two low-loss designs are proposed based on the analysis.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01","The student, Matthew Feddersen, accepted the attached license on 2017-04-19 at 11:23.","The student, Matthew Feddersen, submitted this Thesis for approval on 2017-04-19 at 11:29.","This Thesis was approved for publication on 2017-04-24 at 10:06.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10828 on 2017-08-10 at 15:05:56","Made available in DSpace on 2017-08-10T20:33:03Z (GMT). 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Superconductors exhibit zero loss in dc conditions, though ac current produces considerable loss due to hysteresis, eddy currents, and coupling. For this reason, many present designs for such machines are partially superconducting, meaning that the dc field components are superconducting while the ac armature coils are normal copper conductors. A fully superconducting machine would involve both superconducting field and armature components for higher specific power, though this would introduce the previously mentioned ac losses. This research aims to characterize the expected losses in the components of fully superconducting machines based on partially superconducting designs described in prior work. Various factors are examined, such as motor geometry and operating frequency, and two low-loss designs are proposed based on the analysis.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-05-01","The student, Matthew Feddersen, accepted the attached license on 2017-04-19 at 11:23.","The student, Matthew Feddersen, submitted this Thesis for approval on 2017-04-19 at 11:29.","This Thesis was approved for publication on 2017-04-24 at 10:06.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10828 on 2017-08-10 at 15:05:56","Made available in DSpace on 2017-08-10T20:33:03Z (GMT). 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