Patent ID: 7112903

Claim:
A magnetically journalled rotational arrangement comprising a substantially disc-shaped or ring-shaped magnetically journalled rotor and a stator comprising: means for generating a field, wherein said field produces rotation of the rotor having means for generating a unipolar bias magnetic flux spatially modulated when viewed in the circumferential direction; and a plurality of permanent magnets arranged to cooperate with the means provided on the rotor generating the spatially modulated bias magnetic flux and producing or reinforcing the magnetic journalling of the rotor, wherein the stator effecting the magnetic journalling of the rotor surrounds the ring or disc-shaped rotor, wherein the stator plane and the rotor plane coincide and from a bearing plane, and wherein the means for generating the field are arranged in the segments between the permanent magnets in the stator so that the motor plane in which the rotation of the rotor is produced and the bearing plane in which the journalling of the rotor is produced coincide.