| 摘要 |
PROBLEM TO BE SOLVED: To make a flywheel type electric power-storing device small and light, to rotate a rotor faster and to reduce power consumption. SOLUTION: A flywheel-type electric power-storing device is provided with a rotor 2 having a flywheel 7, a magnetic bearing device 35 for supporting the rotor 2 without contact and a motor generator 5, which works as a motor, when storing power and as a generator when taking power. The magnetic hearing device 35 is provided with two parts of magnetic hearings 3, 4, which support the two portions of the axial direction of the rotor without contact, while the magnetic bearings 3, 4 are provided with four electromagnets arranged to surround the rotor 2. Each electromagnet 8, 9 is of a roughly horseshoe shape, having axial direction magnetic poles 8a, 9a and radial direction magnetic poles 8b, 9b projecting from the two portions of the axial direction towards the inside of the radius direction. The radial direction magnetic poles, opposite to the external circumference of the rotor, attracts the rotor in the radius direction, while the axial direction magnetic poles, opposite to the surface of the rotor which faces the axial direction, attracts the rotor in the axial direction. |
