A rotational machine, designed as a bearing free motor, including a stator designed as a bearing and drive stator having a stator winding and a disc-shaped rotor stored magnetically contact free within the stator. An axial height (H) of the rotor is smaller than or equal to a half diameter (D) of the rotor and with the rotor being passively stabilized by reluctance forces with regard to the stator both against a displacement along a rotational axis (A) of the rotor and also against a tilting from an equilibrium position (G), and with the stator including a permanent magnet for the generation of a homopolar magnetic flux (HΦ). The rotor is a ring-like rotor rotatably arranged about a pole piece of the stator and the rotor includes a ferromagnetic material (FM) and no permanent magnet.
