Development and fundamental characteristics of a YBCO superconducting induction/synchronous motor operated in liquid nitrogen

A high Tc superconducting induction/synchronous motor (HTS-ISM) is designed, fabricated and tested with the use of YBCO coated conductors for rotor bars. The structure of this motor is the same with that of the squirrel-cage induction motor. The YBCO coated conductor, 10 mm in width, is produced by...

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Bibliographic Details
Published in:Superconductor science & technology 2008-01, Vol.21 (1), p.015022-015022 (5)
Main Authors: Nagao, K, Nakamura, T, Nishimura, T, Ogama, Y, Kashima, N, Nagaya, S, Suzuki, K, Izumi, T, Shiohara, Y
Format: Article
Language:English
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Summary:A high Tc superconducting induction/synchronous motor (HTS-ISM) is designed, fabricated and tested with the use of YBCO coated conductors for rotor bars. The structure of this motor is the same with that of the squirrel-cage induction motor. The YBCO coated conductor, 10 mm in width, is produced by means of the MOCVD process, and then such tape is divided into four pieces by using a laser cutting machine. Four cut tapes are bundled for one rotor bar, and commercialized Bi-2223/Ag tapes are utilized for end rings. The fabricated HTS rotor is installed in a conventional stator, and then various tests are carried out in liquid nitrogen. It is successfully observed that the fabricated YBCO HTS-ISM has a synchronous torque. The motor also has an almost constant torque curve because of the steep take-off of the electric field versus current density property. Detailed test results are reported and discussed.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/21/01/015022