AC Losses and Their Thermal Effect in High Temperature Superconducting Machines

Xiaowei (Andy) Song, Nenad Mijatovic, Shengnan Zou, Bogi Bech Jensen, Joachim Holbøll

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

In transient operations or fault conditions, high temperature superconducting (HTS) machines suffer AC losses which have an influence on the thermal stability of superconducting windings. In this paper, a method to calculate AC losses and their thermal effect in HTS machines is presented. The method consists of three sub-models that are coupled only in one direction. The magnetic field distribution is first solved in a machine model, assuming a uniform current distribution in HTS windings. The magnetic fields on the boundaries are then used as inputs for an AC loss model which has a homogeneous approximation and solves the H formulation. Afterwards, the computed AC losses are considered as the heat source in a thermal model to study the temperature profile in HTS windings. The method proposed is able to evaluate AC losses and their thermal effect, thus providing a reference to design an HTS machine and its cooling system.
Original languageEnglish
Title of host publicationProceedings of 24th International Conference on Magnet Technology.
Number of pages5
Publication date2015
Article number1ORCA 07
Publication statusPublished - 2015
EventInternational Conference On Magnet Technology 24 - Seoul, Korea, Republic of
Duration: 18 Oct 201526 Oct 2015

Conference

ConferenceInternational Conference On Magnet Technology 24
CountryKorea, Republic of
CitySeoul
Period18/10/201526/10/2015

Keywords

  • AC losses
  • Finite element methods
  • Homogenization
  • Superconducting machines
  • Thermal stability

Cite this

Song, X. A., Mijatovic, N., Zou, S., Jensen, B. B., & Holbøll, J. (2015). AC Losses and Their Thermal Effect in High Temperature Superconducting Machines. In Proceedings of 24th International Conference on Magnet Technology. [1ORCA 07]