超電導磁気浮上軸受支持0.2kWh級フライホイール電力貯蔵装置の試作 [in Japanese] A trial manufacturing of 0.2kWh class flywheel rotor supported by superconducting magnetic bearing for energy storage system [in Japanese]
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A flywheel rotor whose a main shaft had two pieces of flywheel disk and one magnet was designed and manufactured. The flywheel was made of CFRP material which is light weight and has high tensile strength. The magnet was hooped by CFRP in order to prevent from centrifugal burst. The rotor was suspended by a superconducting magnetic bearing in axial direction and active magnetic bearings in radial direction. The superconducting magnetic bearing was made of <i>Y</i> <i>Ba</i><sub>2</sub><i>Cu</i><sub>3</sub><i>O</i><sub>7-<i>x</i></sub> which had a strong pinning force. It was stably accelerated up to 16, 500rpm by a induction motor in a vacuum chamber and then its energy storage value was 176Wh. The rotor design, bearing and rotational properties of the rotor was discussed.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 117(9), 1132-1137, 1997-09
The Institute of Electrical Engineers of Japan