2026-09-25T22:51:49Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/114102 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Haran, Kiruba 2022-04-29T21:58:39Z 2024-04-29T21:58:46Z 2021-12 Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01 The student, Jianqiao Xiao, accepted the attached license on 2021-12-03 at 10:26. The student, Jianqiao Xiao, submitted this Thesis for approval on 2021-12-03 at 10:31. This Thesis was approved for publication on 2021-12-06 at 10:40. DSpace SAF Submission Ingestion Package generated from Vireo submission #17382 on 2022-04-29 at 16:10:33 Made available in DSpace on 2022-04-29T21:58:39Z (GMT). No. of bitstreams: 2 XIAO-THESIS-2021.pdf: 6759749 bytes, checksum: fdb55c3140e8fa7b92947ced7ef36c85 (MD5) LICENSE.txt: 4207 bytes, checksum: 882846232178b0327529763794ec3929 (MD5) Previous issue date: 2021-12-06 Embargo set by: Seth Robbins for item 123467 Lift date: 2024-04-29T21:58:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Author requested closed access (OA after 2yrs) in Vireo ETD system Limited application/pdf en text Superconducting rotor with high thermal-resistance torque transfer mechanism Xiao, Jianqiao 2021-12-06 Engineering 2022-04-29T21:58:39Z This thesis proposes a superconducting rotor design with a low thermal-conduction torque transfer mechanism that allows the machine to be cooled by one compact cryocooler instead of more bulky methods and thus increases the specific power. The thesis first discusses the limitation on the current density and the iron core of a conventional machine and how superconducting machines may expand these limitations. Then the liquid and cryocooler cooling methods and their challenges for maintaining the cryogenic environment are presented. A superconducting (SC) rotor with a spoke suspension structure is then proposed with a detailed description of its mechanical structure and thermal considerations. Analytical equations are also derived to size the spokes and estimate the cooling requirements. A finite element analysis (FEA) is conducted based on a 3.5 MW, 4,500 rpm SC rotor using the spoke suspension system. A dynamic model is also developed for future analysis on the rotor dynamics which has been changed from previous designs because of the more flexible spoke connections. Thesis eng http://hdl.handle.net/2142/114102 Copyright 2021 Jianqiao Xiao Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Thesis M.S.