Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

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

토로이드형 공심 초전도 변압기의 특성

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

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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