CUED Publications database

Modeling and electrical measurement of transport AC loss in HTS-based superconducting coils for electric machines

Ainslie, MD and Yuan, W and Hong, Z and Pei, R and Flack, TJ and Coombs, TA (2011) Modeling and electrical measurement of transport AC loss in HTS-based superconducting coils for electric machines. IEEE Transactions on Applied Superconductivity, 21. pp. 3265-3268. ISSN 1051-8223

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Abstract

AC loss can be a significant problem for any applications that utilize or produce an AC current or magnetic field, such as an electric machine. The authors are currently investigating the electromagnetic properties of high temperature superconductors with a particular focus on the AC loss in coils made from YBCO superconductors. In this paper, a 2D finite element model based on the H formulation is introduced. The model is then used to calculate the transport AC loss using both a bulk approximation and modeling the individual turns in a racetrack-shaped coil. The coil model is based on the superconducting stator coils used in the University of Cambridge EPEC Superconductivity Group's superconducting permanent magnet synchronous motor design. The transport AC loss of a stator coil is measured using an electrical method based on inductive compensation using a variable mutual inductance. The simulated results are compared with the experimental results, verifying the validity of the model, and ways to improve the accuracy of the model are discussed. © 2010 IEEE.

Item Type: Article
Uncontrolled Keywords: AC loss Coated conductors Electric machines Finite element model H formulation
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:22
Last Modified: 08 Dec 2014 02:33
DOI: 10.1109/TASC.2010.2089484