A mixing system, comprising:
- a mixing device (1), comprising:
- a container (3) with an inner space (5) for accommodating fluids and/or solids;
- a rotatable stirring element (100) for mixing the fluids and/or solids, the rotatable stirring element (100) having a base body (102) and blade elements (104) arranged on the base body (102) and radially around a stirring element rotation axis (RR) extending perpendicularly from the base body (102), the blade elements (104) being configured to mix the fluids and/or solids in the container (3) by rotation of the stirring element (100), and the base body (102) and the blade elements (104) being made of plastic as a single piece;
- a bearing element for mounting the stirring element (100), the bearing element (104) comprising a stationary bearing rod (108) and multiple bearing rod ball bearings (134) arranged at different heights with respect to the stirring element rotation axis (RR) for mounting the rotating elements of the stirring element (100) around the stationary bearing rod (108), such that at least a first of the bearing rod ball bearings (134) is arranged between the stationary bearing rod (108) and the blade elements (104), and at least a second of the bearing rod ball bearings (134) is arranged between the bearing rod (108) and the base body (102) of the stirring element (100);
- wherein the stirring element (100) comprises non-permanently magnetized elements (118) arranged within the base body (102) or embedded in at least one pair of pole protrusions (114), so that the stirring element can be set in rotation by reluctance forces induced from outside;
- and
- a drive device (200) for driving the stirring element (100) in the mixing device (1), the drive device (200) comprising:
- a stator housing (202) on which the mixing device (1) with fluids or solids to be mixed can be attached;
- at least two pairs of coils (208) through which current can flow and that are arranged in pairs on opposite sides with respect to a stator housing axis (SR);
- and
- a control device designed so that current flows successively through the pairs of coils (208), so that the stirring element (100) of the mixing device (1) can be driven by reluctance forces induced in the stirring element (100), wherein:
- the number of pairs of coils (208) in the drive device (200) is greater than the number of pairs of pole protrusions (114), and
- the rotatable stirring element (100), the bearing rod (108) and the base body (102) of the stirring element (100) are positioned inside the inner space (5) of the container (3).