Current status of superconducting synchronous motor in Saga University

Journal Article · Mon Jul 01 00:00:00 EDT 1996 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.511350· OSTI ID:287648

Hoshino, T; Muta, I; Wang, J; Tsukiji, H ^[1]; Yamamoto, Y ^[2]; Hayashi, K ^[3]; Mukai, E ^[4]

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1. Saga Univ., Honjo, Saga (Japan)
2. Showa Electric Wire and Cable Co. Ltd., Kawasaki (Japan)
3. Industrial Technology Center of Saga, Nabeshima, Saga (Japan)
4. Kumamoto Inst. of Tech., Ikeda, Kumamoto (Japan)

Since there are no iron cores in the rotor and stator windings of superconducting synchronous motors, some reactances are intrinsically smaller than the ones of conventional motors. So the low synchronous reactance would be expected to improve the torque-ampere ratio stability and the overload capacity. Two types of 30-kVA synchronous motors, such as rotating armature and rotating field have been constructed. The rotating armature type motor had been fabricated and tested. The results show the difficulty of holding a stator cryostat in a low-heat leak condition. The low synchronous impedance requires some control of the armature current and/or the motor field current. The rotating field type motor encountered a balancing problem due to the triple-pipe configuration of the helium supplier in the torque tube.

• OSTI ID: 287648
• Report Number(s): CONF-950691--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARMATURES
DESIGN
FABRICATION
PERFORMANCE TESTING
RESEARCH PROGRAMS
ROTATION
SUPERCONDUCTING MOTORS