2026-09-22T14:35:00Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/105061 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Haran, Kiruba S. Cheng, Leslie 2019-08-23T20:36:03Z 2019-08-23T20:36:03Z 2021-08-24T09:15:34Z 2019-04-19 2019-05 This thesis examines the design process of a ring motor meant for replacing the front wheel of an electric motorcycle for performance benefits such as traction and additional acceleration. Gas motorcycles are unable to power the front wheel without some degree of mechanical complexity, but electric machinery is not subject to the same constraints because it can be integrated within the wheel itself. The ring motor is designed by first using calculations and verifying the performance through various simulation software such as Motor-CAD, and a thermal test for heat pipes is performed. A concept for packaging it is presented at the end. The machine is designed as a permanent magnet synchronous motor with an outer rotor. Minimizing weight while retaining performance was achieved by using various means, such as increasing the number of poles to reduce the rotor thickness and using finite element analysis to examine the flux density. The lack of coupling between teeth allowed the stator to be thinned greatly, but the active region is quite heavy because of the usage of materials much denser than aluminum. The design of a 40 kW ring motor is described based on constraints given by the original wheel and tire used. The final design required lowering output power to 32 kW due to heat issues, but it is quite viable and efficient enough for practical usage. The packaging concept shows a possible way to enclose the active portion while integrating cooling as well. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-05-01 The student, Leslie Cheng, accepted the attached license on 2019-04-18 at 17:46. The student, Leslie Cheng, submitted this Thesis for approval on 2019-04-18 at 17:52. This Thesis was approved for publication on 2019-04-19 at 16:38. DSpace SAF Submission Ingestion Package generated from Vireo submission #13763 on 2019-08-22 at 15:07:25 Made available in DSpace on 2019-08-23T20:36:03Z (GMT). No. of bitstreams: 2 CHENG-THESIS-2019.pdf: 4558516 bytes, checksum: b31aac8bb5b9829bbf41cd6c0ad59530 (MD5) LICENSE.txt: 4209 bytes, checksum: 4ded519587bc12a63dc63a897effa3a0 (MD5) Previous issue date: 2019-04-19 Embargo set by: Seth Robbins for item 112180 Lift date: 2021-08-23T20:36:18Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 112180 on 2021-08-24T09:15:34Z. application/pdf http://hdl.handle.net/2142/105061 en Copyright 2019 Leslie Cheng Ring motor electric motorcycle electric vehicle wheel Ring motor front wheel for electric motorcycle applications text text Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Thesis M.S.