Flywheel energy storage device e.f. for low-loss storage of electrical energy

摘要

A flywheel energy accumulator has a vertical shaft and passive, superconducting magnetic axial bearings (SML) mounted thereon, as well as an inner rotor electric motor/generator whose rotor is mechanically coupled to several flywheels and whose stator is fixed relative to the vacuum housing of the energy accumulator. The whole flywheel energy accumulator arrangement consists of individual superimposed and mutually linked modules, including a central motor/generator module (A) with a housing ring, the stator and the rotor of the electric machine, several flywheel modules (B) arranged above and below the central module, and SML bearing modules (C) arranged between the flywheel modules and the motor/generator module. The total number of individual superconducting magnetic bearings in the SML bearing modules (C) equals twice the number of flywheel modules (B). Each flywheel has an upper and a lower superconducting magnetic bearing and each individual SML bearing module (C) has one or two superconducting magnetic bearings. The number of SML bearing modules (C) equals twice the number of flywheel modules (B).