Advanced design and experiment of a small-sized flywheel energy storage system using a high-temperature superconductor bearing

A small-sized flywheel energy storage system has been developed using a high-temperature superconductor bearing. In our previous paper, a small-sized flywheel was fabricated and successfully rotated at 38 000 rpm under a vacuum condition. However, a large drag torque was present because of the non-a...

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Bibliographic Details
Published inSuperconductor science & technology Vol. 20; no. 7; pp. 634 - 639
Main Authors Lee, Kangwon, Kim, Bongsu, Ko, Junseok, Jeong, Sangkwon, Lee, Seung S
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.07.2007
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Summary:A small-sized flywheel energy storage system has been developed using a high-temperature superconductor bearing. In our previous paper, a small-sized flywheel was fabricated and successfully rotated at 38 000 rpm under a vacuum condition. However, a large drag torque was present because of the non-axisymmetric magnetic flux of the motor/bearing magnet and the eddy current loss in the planar stator, resulting in a short spin-down time of 20-30 s and a coefficient of friction of 0.15.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/20/7/009