Abstract: The present disclosure provides a device for storing energy, including: at least one electric machine, which is of the Lorentz generator or motor type and has a rotor and a stator, the rotor forming a flywheel; at least one magnet secured to the rotor; and at least one magnetic flux closure. The stator is wound and devoid of ferromagnetic material, and the magnetic flux closure is mounted such that it can move in synchronous rotation with the magnet of the rotor.

Abstract: The invention relates to a method for stabilising a magnetically levitated object (2, 21, 31, 32, 52, 200) subjected to a constant magnetic field, said object being stable in at least one direction and unstable in at least one other direction. The inventive method is characterised in that it comprises a stabilisation step, which is repeated as often as required, and consists in applying an electrical current through at least one conductive element (15a to 16c, 27, 44, 62, 211) subjected to a secondary magnetic field in such a way as to generate a compensating Laplace force in the direction of instability. The invention also relates to a magnetic levitation device (1, 20, 30, 50) stabilised by the inventive method.