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Rotational loss assessment of flywheel energy storage system by Motor/Generator core  

Lee, Jeong-Phil (한전 전력연구원)
Han, Young-Hee (한전 전력연구원)
Jung, Se-Yong (한전 전력연구원)
Han, Sang-Chul (한전 전력연구원)
Jeong, Nyeon-Ho (한전 전력연구원)
Sung, Tae-Hyun (한전 전력연구원)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.10, 2007 , pp. 1775-1781 More about this Journal
Abstract
In this paper, the rotational loss of the superconductor flywheel energy storage system (SFES) by motor/generator stator core was assessed. To do this, the vertical axial type SFES with journal type superconductor bearing was manufactured. To quantitatively assess the rotational loss by the stator core, the rotational losses by superconductor bearing and the degree of a vacuum were measured. In case of variation of the inner radius and outer radius of the stator core, the rotational losses were measured. From the experimental results, It is confirmed that the rotational loss can be reduced by means of the optimal stator core design.
Keywords
Flywheel Energy Storage System(SFES); Rotational loss; Superconductor bearing;
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