| 摘要 |
PURPOSE: To provide a flywheel device having a large load capacity in the axial direction and a small rotation loss. CONSTITUTION: This flywheel device is provided with a vertical rotary shaft 1, a flywheel 2 fixed to it, four-axis control type radial magnetic bearings 3, 4 supporting the rotary shaft 1 in the radial direction in no contact, multiple circular rotary permanent magnets 10 concentrically laminated on the lower end face 2a of the flywheel 2 and having magnetic poles at both ends in the axial direction, and multiple circular fixed permanent magnets 11 concentrically laminated on a housing 7 below the permanent magnets 10 and having magnetic poles at both ends in the axial direction. The magnetic poles at the same end of two adjacent rotary permanent magnets 10 have opposite polarities to each other, and the magnetic pole at the lower end of the rotary permanent magnets 10 and the magnetic pole at the upper end of the fixed permanent magnets 11 facing it have the same polarity. |
