Abstract

An energy storage flywheel is considered as one of the most effective methods to improve the efficiency of the electric power plant. For such a high speed and long term application, however, the eddy current loss in the laminated steel sheet is still induced. This paper proposes a new type of magnetic bearing which is expected to have almost zero eddy current loss. In order to test the energy storage system with proposed magnetic bearing, a small flywheel is designed. The designed flywheel is fabricated and installed to the proposed magnetic bearing. In order to clarify performance of this flywheel magnetic bearing, fundamental characteristics are measured. The rotor could run up 5,200 [rpm] without any serious problem.

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