대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
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CHARACTERISTICS OF A SUPERCONDUCTING AIR-CORE TRANSFORMER OF TOROIDAL SHAP

  • Choi, Kyeong-Dal (Seoul National University, Department of Electrical Engineering) ;
  • Hahn, Song-Yop (Seoul National University, Department of Electrical Engineering)
  • 발행 : 1991.07.18
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초록

With the recent development of high performance AC superconducting wire of very small ac loss and large current carrying capacity, the possibility of superconducting air core transformer is being studied. The air core transformer has merits of no iron loss, no insulation to the core and no harmonics. But the air core transformer has large exciting current and low magnetic coupling factor. To increase the coupling factor, the transformer of toroidal shape is proposed and designed. (10KVA, 110/220V) Compared with air core transformer of solenoidal shape, the performance is improved. The exciting current occupies about 22% of the rated current.

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