{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/129994"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/129994","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Design and analysis of a compact high-torque permanent magnet vernier machine for a portable MRI system","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms","abstract_has_math":false,"creators":["Ayar, Nina"],"institution":"University of Illinois 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":2025,"date_issued":"2025-07-25","date_published":"2025-07-25","updated_at":"2026-07-22T22:25:06Z","subjects":["Permanent Magnet Machine","Vernier","Compact Machine","Torque Density Maximization","Portable Medical Devices","Mri"],"languages":["en","eng"],"rights":["Copyright 2025 Nina Ayar"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/129994","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":["Ayar, Nina"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-07-25","2025-08"]},{"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 Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Permanent Magnet Machine","Vernier","Compact Machine","Torque Density Maximization","Portable Medical Devices","Mri"]}]},{"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 2025 Nina Ayar"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/129994"]}]},{"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 2025-10-20 without embargo terms","The student, Nina Ayar, accepted the attached license on 2025-07-25 at 07:46.","The student, Nina Ayar, submitted this Thesis for approval on 2025-07-25 at 07:52.","This Thesis was approved for publication on 2025-07-25 at 11:32.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22736 on 2025-10-20 at 20:15:48","Low-field magnetic resonance imaging (MRI) has gained interest in recent years as a more accessible and economical alternative to conventional high-field MRI systems. Advancements in hardware design and machine learning algorithms have improved the clinical viability of low-field systems, enhancing their suitability for widespread medical usage and contributing to more equitable access to diagnostic imaging. An innovative portable low-field MRI device utilizes three rotating magnet arrays to provide spatial information required for imaging. In this system, strict size constraints necessitate compact motors capable of deliver- ing high torque consistently. Permanent magnet vernier machines (PMVM) have emerged as a promising alternative, offering high torque at low speeds through the magnetic gearing effect. This topology has been successfully employed in other direct-drive applications and is well-suited for this use case. This thesis presents the design, analysis, and assembly of a compact, torque-dense PMVM tailored for use with a novel portable MRI system. Emphasis is placed on achieving a small form factor, high torque production, and fine angular resolution. The combined electromagnetic design and control scheme establish a solid foundation for prototyping and deploying the machine in practical, high-torque, space-limited applications."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Design and analysis of a compact high-torque permanent magnet vernier machine for a portable MRI system"]}]}],"canonical_facts":{"dc:contributor":["Haran, Kiruba S."],"dc:creator":["Ayar, Nina"],"dc:date":["2025-07-25","2025-08"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms","The student, Nina Ayar, accepted the attached license on 2025-07-25 at 07:46.","The student, Nina Ayar, submitted this Thesis for approval on 2025-07-25 at 07:52.","This Thesis was approved for publication on 2025-07-25 at 11:32.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22736 on 2025-10-20 at 20:15:48","Low-field magnetic resonance imaging (MRI) has gained interest in recent years as a more accessible and economical alternative to conventional high-field MRI systems. Advancements in hardware design and machine learning algorithms have improved the clinical viability of low-field systems, enhancing their suitability for widespread medical usage and contributing to more equitable access to diagnostic imaging. An innovative portable low-field MRI device utilizes three rotating magnet arrays to provide spatial information required for imaging. In this system, strict size constraints necessitate compact motors capable of deliver- ing high torque consistently. Permanent magnet vernier machines (PMVM) have emerged as a promising alternative, offering high torque at low speeds through the magnetic gearing effect. This topology has been successfully employed in other direct-drive applications and is well-suited for this use case. This thesis presents the design, analysis, and assembly of a compact, torque-dense PMVM tailored for use with a novel portable MRI system. Emphasis is placed on achieving a small form factor, high torque production, and fine angular resolution. The combined electromagnetic design and control scheme establish a solid foundation for prototyping and deploying the machine in practical, high-torque, space-limited applications."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/129994"],"dc:language":["en","eng"],"dc:rights":["Copyright 2025 Nina Ayar"],"dc:subject":["Permanent Magnet Machine","Vernier","Compact Machine","Torque Density Maximization","Portable Medical Devices","Mri"],"dc:title":["Design and analysis of a compact high-torque permanent magnet vernier machine for a portable MRI system"],"dc:type":["text"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:06Z"}