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Fabrication and Characteristics of HTS Field Winding of a 100 hp Synchronous Motor  

Sohn Myung-Hwan (한국전기연구원)
Baik Seung-Kyu (한국전기연구원)
Lee Eon-Young (한국전기연구원)
Kwon Young-Kil (한국전기연구원)
Jo Young-Sik (차세대초전도응용기술개발)
Moon Tae-Sun (두산중공업(주))
Kim Yeong-Chun (두산중공업(주))
Kwon Woon-Sik (두산중공업(주))
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.54, no.2, 2005 , pp. 88-93 More about this Journal
Abstract
To develop a 100 hp high temperature superconducting(HTS) motor with high efficiency first in Korea, we fabricated a HTS field winding and test. HTS field winding is composed of sixteen HTS race track shaped coils wound with stainless steel-reinforced Bi-2223 tape conductor by react and wind fabrication method. Nomex paper was used for electrical insulation. Each of four magnet pole assemblies was constructed with four double pancake sub-coils, mechanically stacked and electrically in series. Four magnet assemblies were fixed on an aluminum support structure to make effective heat transfer. The Critical current (Ic) was 41.5A at 77K and self field. However the lowest Ic value of sub-coils was 35A. Joule heat generated by each joints between sub-coils was lower than 1mW at 77K and 34A. And Joule heat generated by the joints between field coils was lower than 10mW at 77K and 34A. Joule heat of the whole field winding was 1W at 77K and 32A. And so, the lowest Ic value of sub-coils was more important than Joule heats generated by all joints. The operating current must be lower than the lowest Ic of all the sub-coils. In this paper, design, construction and testing of HTS field winding, Joule heat generated by the joints, and operating current were discussed.
Keywords
High Superconducting Motor; Bi-2223 Tape; Field Winding; Joint Resistance; Joule Heat;
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