Magnetic levitation device and pump unit

A magnetic levitation device for the contactless magnetic levitation of a rotor which has a disk-shaped or ring-shaped magnetically active core, the magnetic levitation device comprising:

• a stator extending in an axial direction and having a cup-shaped recess which is arranged at a first axial end of the stator and into which the rotor is configured to be inserted, the stator having a back iron, the back iron having a plurality of radial parts, at least one circumferential part, a back iron bottom surface and a back iron surface, each radial part of the plurality of radial parts extending from the at least one circumferential part in a radial direction which is perpendicular to the axial direction, the back iron surface facing a first axial end of the stator and the back iron bottom surface facing a second axial end of the stator, the stator having a plurality of stator poles, each stator pole of the plurality of stator poles having a connecting leg and a pole piece,
• for each stator pole of the plurality of stator poles, the connecting leg extending from a first end to a second end, the first end abutting the back iron, the pole piece having a contact surface abutting the second end of the connecting leg, the pole piece extending from the contact surface in the radial direction to an end face, and the end face arranged around the cup-shaped recess, and
• at least one concentrated winding arranged on each radial part of the plurality of radial parts, and surrounding a respective radial part,
• for each stator pole of the plurality of stator poles, each connecting leg extending from the first end obliquely with respect to the axial direction radially inwards to the second end, such that the back iron surface and a pole piece surface of the pole piece are arranged with an offset with respect to the axial direction.