A novel no-insulation winding technique of high temperature-superconducting racetrack coil for rotating applications: A progress report in Korea university.
This paper presents our recent progress on core technology development for a megawatt-class superconducting wind turbine generator supported by the international collaborative R&D program of the Korea Institute of Energy Technology Evaluation and Planning. To outperform the current high-temperature-superconducting (HTS) magnet technology in the wind turbine industry, a novel no-insulation winding technique was first proposed to develop the second-generation HTS racetrack coil for rotating applications. Here, we briefly report our recent studies on no-insulation (NI) winding technique for GdBCO coated conductor racetrack coils in the following areas: (1) Charging-discharging characteristics of no-insulation GdBCO racetrack coils with respect to external pressures applied to straight sections; (2) thermal and electrical stabilities of no-insulation GdBCO racetrack coils encapsulated with various impregnating materials; (3) quench behaviors of no-insulation racetrack coils wound with GdBCO conductor possessing various lamination layers; (4) electromagnetic characteristics of no-insulation GdBCO racetrack coils under time-varying field conditions. Test results confirmed that this novel NI winding technique was highly promising. It could provide development of a compact, mechanically dense, and self-protecting GdBCO magnet for use in real-world superconducting wind turbine generators.
Department of Materials Science and Engineering, Korea University, Anam-Dong 5 Ga, Seongbuk-Gu, Seoul 136-713, South Korea.
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YH
Choi
Department of Materials Science and Engineering, Korea University, Anam-Dong 5 Ga, Seongbuk-Gu, Seoul 136-713, South Korea.
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JB
Song
Department of Materials Science and Engineering, Korea University, Anam-Dong 5 Ga, Seongbuk-Gu, Seoul 136-713, South Korea.
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DG
Yang
Department of Materials Science and Engineering, Korea University, Anam-Dong 5 Ga, Seongbuk-Gu, Seoul 136-713, South Korea.
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YG
Kim
National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
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S
Hahn
Department of Materials Science and Engineering, Korea University, Anam-Dong 5 Ga, Seongbuk-Gu, Seoul 136-713, South Korea.
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Lee