Large capacity hollow-type flywheel electric power storage device

According to the invention, the hollow shaft, reminding the hollow shaft a predetermined mass flywheel, and connected to each other, the flywheel and the hollow shaft of which is installed in the vacuum chamber, the inner edge of the vacuum chamber is disposed in the center of the vacuum with the flywheel in the large hollow flywheel energy storage device is provided with a hub that is rotatably mounted within the chamber, large hollow in which the hollow shaft within, outwardly doedoe each of the superconducting bearing and electromagnet bearing installed to install a magnetic force with each other is possible shielding the flywheel energy storage device is provided. According to this, by making the magnetic mutual interference between the superconductor bearing and electromagnet bearing possible screened to a magnet shield disposed therebetween to stabilize the mechanical mechanism during shaft rotation and to prevent the rotation loss, advantageously enhance the design availability is. Hollow shaft, flywheel energy storage devices, superconducting bearings, bearing electromagnets, magnetic shield