{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/116246"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/116246","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Investigation of qualification methods for electric machines in urban air mobility application","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms","abstract_has_math":false,"creators":["Lewis, Maxwell"],"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 A"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-08","date_published":"2022-08","updated_at":"2026-07-22T22:24:55Z","subjects":["eVTOL","Electrical engineering","insulation","reliability","Urban Air Mobility","Thermomechanical reliability"],"languages":["en","eng"],"rights":["Copyright 2022 Maxwell Lewis"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/116246","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Haran, Kiruba A"]},{"key":"dc:creator","label":"Author","values":["Lewis, Maxwell"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-08","2022-07-18"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"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":["eVTOL","Electrical engineering","insulation","reliability","Urban Air Mobility","Thermomechanical reliability"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2022 Maxwell Lewis"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/116246"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms","The student, Maxwell Lewis, accepted the attached license on 2022-07-14 at 13:47.","The student, Maxwell Lewis, submitted this Thesis for approval on 2022-07-14 at 13:54.","This Thesis was approved for publication on 2022-07-18 at 13:07.","DSpace SAF Submission Ingestion Package generated from Vireo submission #18310 on 2022-11-15 at 18:21:10","A significant challenge to developing electrified propulsion systems is ensuring the reliability of motor winding insulation. In an urban air taxi application, a motor responsible for propulsion will be operating under a unique mission profile. Traditionally, an aircraft will have a brief acceleration and climbing period and remain in a steady state operating condition while cruising. However, an urban air taxi application will require short mission profiles, featuring climbing much more frequently than a traditional mission. Concept machines for this application need to be made to optimize specific power to meet this demand, which in concept requires overloading these machines during climbing. The research community is investigating how this rapid overloading operation causes the electromechanical pieces to interact and how that impacts degradation of windings. With multiple pieces constantly heating and cooling, each with different thermal conductivities, the stresses applied to windings stand to vary considerably. This project has seen the procurement of samples representative of a concept eVTOL machine and will compare these operating cycles to the traditional Arrhenius aging relationship used to classify winding lifetimes. Degradation is tracked by quantifying changes in partial discharge phenomena and loss angle tests after varying operating conditions. The hope is to develop insulation lifetime models and identify trends associated with short mission cycles in a machine designed for an urban air taxi application to motivate future standards and lifetime models in the qualification of windings specific to this application."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Investigation of qualification methods for electric machines in urban air mobility application"]}]}],"canonical_facts":{"dc:contributor":["Haran, Kiruba A"],"dc:creator":["Lewis, Maxwell"],"dc:date":["2022-08","2022-07-18"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms","The student, Maxwell Lewis, accepted the attached license on 2022-07-14 at 13:47.","The student, Maxwell Lewis, submitted this Thesis for approval on 2022-07-14 at 13:54.","This Thesis was approved for publication on 2022-07-18 at 13:07.","DSpace SAF Submission Ingestion Package generated from Vireo submission #18310 on 2022-11-15 at 18:21:10","A significant challenge to developing electrified propulsion systems is ensuring the reliability of motor winding insulation. In an urban air taxi application, a motor responsible for propulsion will be operating under a unique mission profile. Traditionally, an aircraft will have a brief acceleration and climbing period and remain in a steady state operating condition while cruising. However, an urban air taxi application will require short mission profiles, featuring climbing much more frequently than a traditional mission. Concept machines for this application need to be made to optimize specific power to meet this demand, which in concept requires overloading these machines during climbing. The research community is investigating how this rapid overloading operation causes the electromechanical pieces to interact and how that impacts degradation of windings. With multiple pieces constantly heating and cooling, each with different thermal conductivities, the stresses applied to windings stand to vary considerably. This project has seen the procurement of samples representative of a concept eVTOL machine and will compare these operating cycles to the traditional Arrhenius aging relationship used to classify winding lifetimes. Degradation is tracked by quantifying changes in partial discharge phenomena and loss angle tests after varying operating conditions. The hope is to develop insulation lifetime models and identify trends associated with short mission cycles in a machine designed for an urban air taxi application to motivate future standards and lifetime models in the qualification of windings specific to this application."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/116246"],"dc:language":["en","eng"],"dc:rights":["Copyright 2022 Maxwell Lewis"],"dc:subject":["eVTOL","Electrical engineering","insulation","reliability","Urban Air Mobility","Thermomechanical reliability"],"dc:title":["Investigation of qualification methods for electric machines in urban air mobility application"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:55Z"}