Superconducting rotor with high thermal-resistance torque transfer mechanism

Xiao, Jianqiao

Permalink

https://hdl.handle.net/2142/114102 Copy

Description

Title

Superconducting rotor with high thermal-resistance torque transfer mechanism

Author(s)

Xiao, Jianqiao

Issue Date

2021-12-06

Director of Research (if dissertation) or Advisor (if thesis)

Haran, Kiruba

Department of Study

Electrical & Computer Eng

Discipline

Electrical & Computer Engr

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• superconducting
• heat transfer

Abstract

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.

Graduation Semester

2021-12

Type of Resource

Thesis

Permalink

http://hdl.handle.net/2142/114102

Copyright and License Information

Copyright 2021 Jianqiao Xiao

Owning Collections