Magnetic levitation device and a centrifugal pump

A magnetic levitation device for contactless magnetic levitation of a rotor, comprising:

• a disk-shaped or ring-shaped magnetically effective core;
• a stator comprising a plurality of coil cores with a plurality of longitudinal legs and a plurality of transverse legs, each coil core of the plurality of coil cores comprising a longitudinal leg of the plurality of longitudinal legs extending from a first end in an axial direction to a second end, and a transverse leg of the plurality of transverse legs arranged at the second end of the longitudinal leg and extending in a radial direction perpendicular to the axial direction, at least one concentrated winding provided at each longitudinal leg of the plurality of longitudinal legs surrounding the longitudinal leg, the stator further including a cup-shaped recess into which the rotor is capable of being inserted, the cup-shaped recess arranged at an axial end of the stator, and the transverse leg of each of the plurality of transverse legs arranged around the cup-shaped recess;
• a containment can including the cup-shaped recess contacting end faces of the plurality of transverse legs radially from an inside and including a radially outer edge partially surrounding the plurality of the transverse legs radially from an outside;
• a circuit board with electronic components, the electronic components comprising a plurality of sensors to measure a position of the rotor through the containment can in a contact free manner;
• a ring-shaped back iron configured to conduct magnetic flux to the plurality of longitudinal legs of the plurality of coil cores that mechanically contact the back iron;
• a stator housing radially surrounding the plurality of coil cores with the plurality of longitudinal legs and the plurality of transverse legs including the ring-shaped back iron and concentrated windings provided at each longitudinal leg of the plurality of longitudinal legs and surrounding the longitudinal leg and at least partially surrounding the containment can including a cup-shaped recess;
• the stator housing being metal and coated with a chemically resistant polymer;
• the containment can being a chemically resistant polymer, and being connected to the stator housing in a sealed manner;
• the containment being formed by the containment can and the stator housing being at least partially filled with a potting compound, holding the plurality of coil cores, the concentrated windings provided at each longitudinal leg, and the back-iron,
• at least one sensor being arranged in the containment can and around the cup-shaped recess, the at least one sensor arranged between at least one longitudinal leg of the plurality of longitudinal legs and the cup-shaped recess with respect to the radial direction.

A magnetic levitation device for contactless magnetic levitation of a rotor, comprising:

• a disk-shaped or ring-shaped magnetically effective core;
• a stator comprising a plurality of coil cores with a plurality of longitudinal legs and a plurality of transverse legs, each coil core of the plurality of coil cores comprising a longitudinal leg of the plurality of longitudinal legs extending from a first end in an axial direction to a second end, and a transverse leg of the plurality of transverse legs arranged at the second end of the longitudinal leg and extending in a radial direction perpendicular to the axial direction, at least one concentrated winding provided at each longitudinal leg of the plurality of longitudinal legs surrounding the longitudinal leg, the stator further including a cup-shaped recess into which the rotor is capable of being inserted, the cup-shaped recess arranged at an axial end of the stator, and the transverse leg of each of the plurality of transverse legs arranged around the cup-shaped recess;
• a circuit board with electronic components, the electronic components comprising a plurality of sensors to measure a position of the rotor through a containment can in a contact free manner;
• the containment can including the cup-shaped recess contacting end faces of the plurality of transverse legs radially from an inside and including a radially outer edge partially surrounding the plurality of the transverse legs radially from the outside;
• a ring-shaped back iron configured to conduct magnetic flux to the longitudinal legs of the coil cores mechanically contacting the back iron;
• a stator housing radially surrounding the plurality of coil cores with the plurality of longitudinal legs and the plurality of transverse legs including the ring-shaped back iron and the concentrated windings provided at each longitudinal leg of the plurality of longitudinal legs surrounding the longitudinal leg and at least partially surrounding the containment can including a cup-shaped recess;
• the stator housing being metal and coated with a chemically resistant polymer;
• the containment can being a chemically resistant polymer, and being connected to the stator housing in a sealed manner;
• the containment being formed by the containment can and the stator housing being at least partially filled with a potting compound, holding the plurality of coil cores, the concentrated windings provided at each longitudinal leg of the plurality of longitudinal legs, and the back-iron,
• a space, which is located within an interior space surrounded by the plurality of longitudinal legs is configured to receive further electronic components or electronics boards or plugs or connections.