한국초전도학회:학술대회논문집

한국초전도학회 (The Korean Superconductivity Society)
권호 표지

고온초전도체 베어링을 사용하는 에너지 저장용 플라이휠 장치의 제작 및 성능 평가

Fabrication arid Performance Tests of Flywheel Energy Storage System using High Tc Superconducting Bearing

  • 이호진 (한국원자력연구소, 기능성재료분야) ;
  • 김기백 (한국원자력연구소, 기능성재료분야) ;
  • 고창섭 (충북대학교, 전기공학과) ;
  • 이수훈 (아주대학교, 기계 및 산업공학부) ;
  • 홍계원 (한국원자력연구소, 기능성재료분야)
  • Lee, Ho-Jin (Functional Materials, Korea Atomic Energy Research Institute) ;
  • Kim, Ki-Baik (Functional Materials, Korea Atomic Energy Research Institute) ;
  • Koh, Chang-Seop (Department of Electrical Engineering, Chungbuk University) ;
  • Lee, Soo-Hoon (School of Mechanical and Industrial Engineering, Ajou University) ;
  • Hong, Gye-Won (Functional Materials, Korea Atomic Energy Research Institute)
  • 발행 : 1999.08.18
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초록

A prototype of Flywheel Energy Storage System with high Tc superconducting bearings was fabricated and tested to verify its applicability for the energy industry. The moment of inertia of assembled wheel with rotor magnets is about 1.072${\times}$10$^{-1}$ Kg-m$^2$. The wheel was designed to withstand its integrity up to the rotation speed of 20,000 rpm. YBCO bulk superconductors prepared by seed growth method were used as bearing to levitate and stabilize the rotating wheel. High speed rotation of the flywheel without mechanical contact was achieved by using specially designed Halbach type motor. The flywheel system showed very high stability during test operation performed up to the speed of about 10,000rpm. The energy loss measured by free decay test performed between 9,300 rpm and 7,000 rpm was calculated as about 45 W.

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