| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a flywheel electric power storage device capable of reducing power loss, and improving energy storage efficiency. <P>SOLUTION: A magnetic bearing device 4 incorporated in this flywheel power storage device is provided with a plurality of magnetic bearings 6, 7, and 8 having a plurality of electromagnets 17, 7a, and 8a for magnetic levitation of a flywheel rotation shaft 3 by noncontact support in an axial direction and a radial direction, and a permanent magnet 18 to attract the flywheel rotation shaft 3 in the axial direction to be suspended. The permanent magnet 18 has attracting force equivalent to weight of a flywheel 2. An attracting force regulating means 20 is provided to regulate attracting force of the permanent magnet 18. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
