Abstract: The invention relates to a magnetic bearing assembly of a rotor in a stator, with at least one magnetic bearing (1) comprising a stator part (2) and a rotor part (3) arranged coaxially thereto in the operating position without contacting the stator part. The bearing effective area of the rotor part is formed by a radial exciting system (6) having a permanent magnet (4), while the stator part (2) comprises a high-temperature superconductor concentrically surrounding the radial exciting system (6) while maintaining an annular air gap (10).

Abstract: An improved fly wheel for storing rotational energy includes an inner ring and an inertial ring separated by an intermediate space. A radially resilient coupling device connects the inner and inertial rings and is subjected to a radial bias force, which exerts an outward force on the inertial ring.