NDLI: Drag torque in high Tc superconducting magnetic bearings with multi-piece superconductors in low speed high load applications

Content Provider	IEEE Xplore Digital Library
Author	Ye, H. Postrekhin, Y. Ki Bui Ma Wei-Kan Chu
Copyright Year	2002
Abstract	The design of superconductor magnet bearings for high load applications such as flywheel kinetic energy storage necessitates the use of large pieces of high quality high temperature superconductors. Limitations on the size of one continuous block of HTS materials that can be produced make it very attractive to use contiguous pieces of high quality HTS materials to provide the same large amount of HTS surface that can interact with magnets to give as high a levitation force. More often than not, the shape of such a composite piece is not symmetric about any axis of rotation. Variations in the drag torque are observed within each rotation cycle of the magnet above the composite HTS piece. The authors show that part of this drag torque variation originates from the nonaxisymmetric shape of the composite HTS piece. Implications of this drag torque variation on the power loss of superconductor magnet bearings made with composite HTS pieces are discussed.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1661
Ending Page	1664
Page Count	4
File Size	406434
File Format	PDF
ISSN	10518223
Volume Number	11
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Torque High temperature superconductors Magnetic levitation Drag Superconducting magnetic energy storage Magnetic materials Superconducting magnets Superconducting materials Shape Flywheels
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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