Abstract: A superconductive element is described, comprising a rigid support made of a non-superconductive material, said support comprising at least one superconductive track formed by a groove containing a superconductive material having a density equal to at least 85% of the value of its theoretical density, and the process for producing said element. The present invention also relates to the possible uses of the superconductive elements, and also to superconductive devices comprising said superconductive elements.

Abstract: A power distribution system that can be used in naval ships and submarines includes a first propulsion drive system including a propulsion motor having superconducting (preferably high temperature superconducting (HTS)) rotor windings and a power converter. A first propulsion power generation system supplies power to the first propulsion drive system and includes a generator having superconducting (preferably HTS) rotor windings and a power converter. A first power generation system includes a power source for supplying power to a first service distribution system that includes a dc distribution busbar (optionally implemented using HTS cabling or busbar) for carrying a distribution voltage and a distribution current, and a switchboard that includes protective switchgear with contacts. A power converter is used to connect the power source to the switchboard. The power converters are regulated according to a power source foldback and stabilizing characteristic.

Abstract: A series coupling synchronous axial gap type motor where rotors and stators are alternately stacked with required air gaps in the axial direction of a rotary shaft as a main shaft, is provided. The rotors are fixed to the rotary shaft, and the stators are disposed such that they cannot be interlocked with the rotary shaft. A plurality of rotary field bodies are attached to each of the rotor around the axis, and a plurality of armature coils are made to face the rotary field bodies with an air gap therefrom and are attached to each of the stators around the axis such that their magnetic-flux directions are directed toward the axial direction. The armature coils have an empty core, or a core member composed of a magnetic body attached thereto.

Abstract: An electromechanical power converter that has a rotor assembly with a conductive shell, a first conductor made from superconducting material that is in series electrical contact with the conductive shell and a second conductor made from superconducting material and in series electrical contact with said conductive shell, thus providing an internal impedance converting electromechanical power converter.

Abstract: The invention relates to a ship propulsion system (S) having a pump jet (P) comprising a pump housing (G) and a drive motor, wherein the drive motor is a solenoid motor (M) integrated into the pump housing (G).

Abstract: The present invention relates to cylindrical rotating electric machines which comprise armature and field coils, with either the field coil or the dual armature being the rotating component. The dual armature is composed of two concentric cylindrical sets of coils with the field coil situated in the gap between the inner and outer armature sections. Relative rotational motion between the field and armature coils can be achieved by having either one be the rotor. By using two armature coil sections, one inside the field coil aperture and the other external to the field coil, the flux linkage between the armature and superconducting field coil can be approximately doubled. This is a more efficient use of the superconductor. The increased flux linkage in the invented technology produces a substantially higher power density than can be obtained with current conventional superconducting machine technology.

Abstract: A high temperature superconducting synchronous motor having an inductor topology that increases the air gap flux density in direct relation to motor power density by trapping flux and concentrating it in the air gap to obtain more power in the same volume or smaller volume for the same power, and whose geometry enables the induction motor to be lighter than superconducting motors without the inductor topology, the motor being positioned in a housing, and the motor comprising: a) stator means having an armature winding to provide a stator field; c) rotor means positioned within the stator field and on which is disposed at least two polygon shaped ring or coil means along the same axis to provide separated and spaced apart relationship field solenoids; c) at least four high temperature superconducting plate means disposed in alternating relationship between the ring or coil means to hold the ring or coil means together to trap magnetic field and shape flux lines; and d) cooling means to cool the superconduct

Abstract: The invention offers an oxide superconducting wire, a superconducting structure, a method of producing an oxide superconducting wire, a superconducting cable, a superconducting magnet, and a product incorporating the superconducting magnet. The oxide superconducting wire is a tape-shaped oxide superconducting wire in which a plurality of filaments, each of which has a Bi-2223-based oxide superconductor, are embedded in a matrix. The oxide superconducting wire has a cross-sectional area of at most 0.5 mm2 in a cross section perpendicular to the direction of its length. In the cross section of the oxide superconducting wire, the filaments have an average cross-sectional area per filament of at least 0.2% and at most 6% of the cross-sectional area of the oxide superconducting wire. Having the above features, the oxide superconducting wire can not only increase its critical current density but also decrease its AC loss.

Abstract: A superconducting electrical machine comprises a rotor and a stator. The stator comprises a stator having a plurality of circumferentially spaced radially extending teeth and a plurality of superconducting electric coils. Each superconducting electric coil is positioned around a respective one of the teeth. A thermally conducting member surrounds and contacts the stator. A cooler is arranged to cool the thermally conducting member. A vacuum enclosure encloses the thermally conducting member, the stator and the superconducting electric coils and a pump is arranged to evacuate the vacuum enclosure. The superconducting electrical coils comprise magnesium diboride.

Abstract: A magnetizing device for superconductor and a superconducting synchronous machine are provided capable of constituting more compact and simple equipment that uses a superconductor as a magnet. The magnetizing device for superconductor includes a superconductor (131); a coolant chamber (142) for cooling the superconductor (131) down to or below a critical temperature at which the transition to a superconducting state occurs; coils (111, 111?) for generating a magnetic field equal to or higher than a critical magnetic field in which the intrusion of a magnetic flux into the superconductor (131) starts, around the superconductor (131) cooled down to or below the critical temperature at which the transition to the superconducting state occurs; and position modification means capable of arranging the superconductor (131) on a disk (120) and modifying the relative positional relationship with the coils (111, 111?).

Abstract: A support module is provided for use in a rotor assembly of a rotating machine. The support module is disposed on the rotor body, supports high temperature superconductor rotor windings within the rotor assembly, and thermally decouples the cold portions of the rotor assembly, including windings and support tube, from the ambient temperature rotor body and drive shaft. The support module includes a frame disposed on the rotor body, a support block connected to the rotor winding and suspended within the frame, and thermally non-conductive straps extending from each of a pair of opposed sides of the support block to the frame, the straps suspending the support block within the frame.

Abstract: A rotor (or a stator) for a superconducting electrical machine includes a mounting that is maintained at substantially ambient temperature during operation of the electrical machine and a field coil support structure. A plurality of superconducting field coils are maintained at cryogenic temperatures during operation of the electrical machine and are supported by the field coil support structure. At least one coupling element is used to fix the field coil support structure to the mounting. The field coil support structure is preferably fixed to the mounting by a plurality of substantially circumferentially extending coupling elements at a first and second axial end of the field coil support structure and the mounting such that the mounting and field coil support structure are substantially separated over their axial lengths by a vacuum gap.

Abstract: A superconducting transmission line includes a superconducting article including at least one HTS wire, a cooling system including at least in part one or more thermoelectric or thermionic coolers thermally coupled to the HTS wire. The thermoelectric coolers are powered by electricity flowing along the HTS wire. A system for generating and transporting nuclear power includes a nuclear power plant including a turbine for generating electricity, and a superconducting transmission line according to an embodiment of the invention.

Abstract: Methods and systems provide pulsed-power to a load utilizing high temperature superconductors (HTS) within multiple pulsed-power devices. According to embodiments described herein, each pulsed-power device includes a HTS mounted on a rotor and an armature coil mounted on a stator. The rotor is positioned to allow a magnetic field within the HTS to induce a voltage in the armature coil when the rotor is rotating and to allow a magnetic field created by passing current through the armature coil to charge the HTS. Current created from the operation of a first pulsed-power device is routed to the armature coil in a second pulsed-power device to charge the associated HTS to a higher value. Subsequently, the second pulsed-power device is operated to produce current that is used to further charge the HTS in the first pulsed-power device. This bootstrapping procedure is repeated until all HTSs are fully charged.

Abstract: Apparatus and methods provide for a high specific power electro-dynamo device that utilizes high-temperature superconductors, a dysprosium core, and superconducting coils to provide power. According to various embodiments, a rotor includes a number of rotor arms with a high-temperature superconductor attached to each arm. A stator includes a number of stator arms with stator coils wrapped around each arm. The stator coils may include superconducting wires for providing a charge to the high-temperature superconductors and non-superconducting wires for inducing a voltage from the trapped flux provided by the superconductors during operation in generator mode. The dysprosium core maximizes the magnetic flux saturated by the core while providing additional safety measures during operation. A backup power wheel or permanent magnets positioned in series with the high-temperature superconductors may provide emergency power at non-cryogenic temperatures.

Abstract: A superconducting field coil assembly includes a superconducting field coil disposed within a vacuum insulated electro-magnetic (EM) shielded cryostat. A water cooling jacket is thermally integrated with the outer surface of the EM shielded cryostat.

Abstract: A system for cooling a superconducting rotary machine includes a plurality of sealed siphon tubes disposed in balanced locations around a rotor adjacent to a superconducting coil. Each of the sealed siphon tubes includes a tubular body and a heat transfer medium disposed in the tubular body that undergoes a phase change during operation of the machine to extract heat from the superconducting coil. A siphon heat exchanger is thermally coupled to the siphon tubes for extracting heat from the siphon tubes during operation of the machine.

Abstract: Support structures (100) for attaching superconducting conductors (106) to a rotor (50) of an electrical machine (10). The support structures (100) are mechanically configured to transfer loads exerted on the superconducting conductors (106) during both normal and transient operation of the rotor (50). The mechanical configuration and material of the support structures (100) further present a thermal path that is longer than the physical distance between the superconducting conductors (106) and the rotor (50) thereby minimizing heat flow from the warm rotor (50) to the cold superconducting conductors (106).

Abstract: Methods and apparatuses for improved damping in high-temperature superconducting levitation systems are disclosed. A superconducting element (e.g., a stator) generating a magnetic field and a magnet (e.g. a rotor) supported by the magnetic field are provided such that the superconducting element is supported relative to a ground state with damped motion substantially perpendicular to the support of the magnetic field on the magnet. Applying this, a cryostat housing the superconducting bearing may be coupled to the ground state with high damping but low radial stiffness, such that its resonant frequency is less than that of the superconducting bearing. The damping of the cryostat may be substantially transferred to the levitated magnetic rotor, thus, providing damping without affecting the rotational loss, as can be derived applying coupled harmonic oscillator theory in rotor dynamics. Thus, damping can be provided to a levitated object, without substantially affecting the rotational loss.

Abstract: Methods and apparatuses to provide improved auxiliary damping for superconducting bearings in superconducting levitation systems are disclosed. In a superconducting bearing, a cryostat housing the superconductors is connected to a ground state with a combination of a damping strip of material, a set of linkage arms to provide vertical support, and spring washers to provide stiffness. Alternately, the superconducting bearing may be supported by a cryostat connected to a ground state by posts constructed from a mesh of fibers, with the damping and stiffness controlled by the fiber composition, size, and mesh geometry.

Abstract: A superconductive synchronous machine having superconductive magnetic bearings. A superconductor (6) on the stator side as a first bearing part is disposed opposite from a second bearing part (12) on the rotor side, the second being part being magnetically and mechanically connected via a flux feed section (11) to the pole core (9) of the rotor. A superconductive exciting coil (10) in the rotor pole core (9) excites both the pole core (9) and the second bearing part (12). In order to cool the superconductive exciting coil (10), coolant feeds (16, 16?, 24, 25) are provided, which are sealed in relation to the rotor shaft (8, 8?) by ferrofluid seals (26). The power for the exciting coil is fed via slip rings (21) or by being inductively connected (29) at the rotor shaft (8?).

Abstract: The invention relates to a machine with an uncooled rotor, which is mounted such that it is capable of rotating about an axis of rotation and which has cutouts or flattened portions on its outside. At least one rotor winding, which is accommodated in a cryostat with a cryostat wall and is to be cooled to low temperature, should be arranged in the cross-sectional area region of these flattened portions. A holding and/or support device is used for transmitting forces acting on the rotor winding beyond the cryostat wall to the rotor body. In order to reduce losses in the cooling system which occur as a result of thermal conduction, the holding and/or support device should contain at least one support element, which is equipped with means for reducing the thermal conductivity.

Abstract: A superconducting direct drive wind generator including an armature coil constructed of a first superconducting material and a field coil constructed of a second superconducting material, wherein, during operation of the generator, the armature coil and the field coil are in electromagnetic communication and the field coil produces a magnetic field in response to an excitation current flow therethrough that induces an output current flow in the armature coil that generates an electrical power output.

Abstract: A biaxially textured article includes a substrate, a first buffer layer disposed on the substrate, the first buffer layer having uniaxial crystal texture characterized by out-of-plane texture with no significant in-plane crystallographic texture. A metal comprising second buffer layer is disposed on the first buffer layer, the second buffer layer having a biaxially textured surface. An electronically active layer, such as a superconductor layer, can be disposed on the second buffer film. Ion-beam assisted processes can be used to biaxially texture the surface of the second buffer film after its deposition.

Abstract: Methods and apparatuses to provide improved auxiliary damping for superconducting bearings in superconducting levitation systems are disclosed. In a superconducting bearing, a cryostat housing the superconductors is connected to a ground state with a combination of a damping strip of material, a set of linkage arms to provide vertical support, and spring washers to provide stiffness. Alternately, the superconducting bearing may be supported by a cryostat connected to a ground state by posts constructed from a mesh of fibers, with the damping and stiffness controlled by the fiber composition, size, and mesh geometry.

Abstract: High-temperature superconductive devices and assemblies are provided. According to one embodiment, a high-temperature superconductive device includes a superconducting substrate and a dielectric ceramic insulator. The superconducting substrate comprises a superconducting material having superconductive properties above about 60 K. The dielectric ceramic insulator is applied to the superconducting substrate. The dielectric ceramic insulator comprises a thermal conductivity of at least about 0.2 W/cm-K at a temperature ranging from about 60 K to about 90 K and has a grain size of at least about 2 microns. Additional embodiments are disclosed and claimed.

Abstract: With an aim of minimizing excitation losses in electric machines having electrically excited and displaceable secondary parts, bi-directional inductive transmission of energy is carried out by a rotating inductive transmission device. An associated electronic system for the bi-directional transmission of power and/or energy, is provided. Advantageously, super-conductive inductance is present wherein the flow is introduced. It is possible to excite by supplying energy to the stator and to also de-excite by removing energy without converting the power into heat on the rotor by applying a bipolar tension.

Abstract: The invention relates to a ship propulsion unit with drive devices in the hull and all underwater pod, which is located outside of the hull and which has a front propeller and a rear propeller as well as torque transmitting devices between the drive devices and the propellers. The torque transmitting devices contain: a torque transmitting shalt that is shared by both propellers and serves to transmit torque from the drive devices into the underwater pod; front transmission devices, which are placed in the underwater pod and which are located between the shared torque transmitting shaft or both propellers and the front propeller, and; rear transmission devices that are located between the shared torque transmitting shaft of both propellers and the rear propeller. The invention also relates to a ship propulsion method during which a front propeller and a rear propeller, which are assigned to an underwater pod located outside of the hull, are driven by drive devices in the hull via torque transmitting devices.

Abstract: The machine contains a rotor with a hot rotor housing in which a cold part with a superconductive rotor winding is located. A part which acts as a baffle screen is provided on the outside of the rotor housing, facing a stator. Supporting elements are intended to be provided at predetermined points between the hot housing and the cold part, extending in the radial direction to such an extent that, during normal operation of the machine, a short separation is in each case formed between the supporting elements and the hot housing or the cold part, and such that a force fit is prodiced between the hot housing and the cold part via the supporting elements only in the event of a defect which leads to deformation of the hot housing of the machine.

Abstract: Disclosed herein is a superconducting field coil of a homopolar type superconducting synchronous machine. The superconducting synchronous machine includes a superconducting field coil which comprises a single or double pancake coil formed by winding a superconducting wire, a core-type rotor which is made of a magnetic material, and an armature winding excited to three phases on a surface of a core of a stator. The field coil of the homopolar type superconducting synchronous machine is not rotated when the machine is in operation. Thus, there is no part for coupling the rotating field coil to a stationary cryo-cooler for cooling a refrigerant, so that the structure is simple, reliability is high, and various cooling methods are available.

Abstract: An outer rotor superconductor journal bearing that comprising modules and including an outer rotor superconductor journal bearing that cools a superconductor that is mechanically fixed to a module below a critical temperature, attains a strong magnetic fixing force in an axial direction and a radial direction, prevents the superconductor from being damaged due to a different thermal expansion between the superconductor and a cryostat when cooled, and is easier for assembling and repair and maintenance. Preferably, the outer rotor superconductor journal bearing includes a rotor in which a solid of revolution magnet is magnetized in an axis direction in an inner portion of an inner circumference thereof; and a stator comprising a cryostat in the shape of a cylinder in which a superconductor that is tightly adhered to an inner circumference of the rotor is mounted in an outer circumference of the cryostat.

Abstract: A generator that comprises at least one ferromagnetic core including a gap, a magnet capable of producing a normal magnetic field within said gap and at least one coil positioned within the normal magnetic field on the core. At least one diamagnet that is positioned to pass through said gap on said core, wherein the diamagnet momentarily blocks the normal magnetic field causing a voltage to be induced within said coil.

Abstract: A linear motor for high velocity drive has a transformer which has a magnetic circuit with a central limb; the two ends of stacked unit- or fractional-turn secondary winding of the transformer project at an angle to the longitudinal axis of the central limb; an armature links the two ends, sliding parallel to the longitudinal axis. The armature has dielectrics to form two series-connected capacitors in conjunction with the two ends. The transformer's primary winding is connected to an ac or pulse power source. The resonant frequency for the LC circuit formed by the two capacitors in series to the total effective inductance of the power source, the electric transformer and the armature is determined. The frequency or the pulse rise time of the power source is matched to the resonant frequency, in order to supply adequate electric power from the power source to the series LC circuit.

Abstract: The present invention provides for a static excitation system for a superconducting rotor that comprises multiple brushes (12) in contact with the superconducting rotor winding (6), normally via collector rings and field leads. A power conditioning device (16) is connected to the brushes (12), and an energy storage device (18) is linked to the power conditioning device (16). The power conditioning device provides power from the energy storage device to the superconducting rotor when required, and when power to the superconducting rotor is not required, the power conditioning device takes excess power from the superconducting rotor and stores it in the energy storage device.

Abstract: An acyclic homopolar electromechanical power converter that uses superconducting series connected rotor elements for series summation of magnetomotive and electromotive force. The novel rotor assembly comprises a plurality of conductor elements connected in series by superconducting series connections. The behavior of the superconducting series connections provides a form of flux isolation and series summation of forces that has heretofore been impossible in electromechanical power converters. The superconducting series connections further modify the rotor impedance of an acyclic homopolar electromechanical power converter to provide long needed improvements to acyclic homopolar electromechanical power converter designs.

Abstract: Methods and apparatuses for improved damping in high-temperature superconducting levitation systems are disclosed. A superconducting element (e.g., a stator) generating a magnetic field and a magnet (e.g. a rotor) supported by the magnetic field are provided such that the superconducting element is supported relative to a ground state with damped motion substantially perpendicular to the support of the magnetic field on the magnet. Applying this, a cryostat housing the superconducting bearing may be coupled to the ground state with high damping but low radial stiffness, such that its resonant frequency is less than that of the superconducting bearing. The damping of the cryostat may be substantially transferred to the levitated magnetic rotor, thus, providing damping without affecting the rotational loss, as can be derived applying coupled harmonic oscillator theory in rotor dynamics. Thus, damping can be provided to a levitated object, without substantially affecting the rotational loss.

Abstract: The invention relates to a primary part of a linear motor having a receptacle for a secondary part which can move along an axis in the receptacle, having a plurality of annular coils which are arranged coaxially with respect to the receptacle, and having a yoke, with teeth which are composed of a soft-magnetic material being arranged or formed between the end faces of adjacent coils. In order to provide a primary part or a linear motor which has a high power density in a compact form and allows good cooling with coolant, cooling gaps in which spacers are arranged are formed between the end faces of the coils and the teeth.

Abstract: An in-shaft cryogenic cooler mounts entirely within the shaft of a dynamoelectric machine that has a rotor comprising a high temperature superconductor.

Abstract: A winding for use in a superconducting electric generator having a rotating rotor assembly surrounded by a non-rotating stator assembly is provided. The winding comprises at least one conductor structure associated with a component in the superconducting electric generator. The conductor structure comprises a plurality of conductive elements formed from a high temperature superconductive material. At least a portion of the conductive elements is arranged in a transposed relationship. A protective shell is positioned about the conductive elements and formed from a high strength alloy suitable for cryogenic temperatures.

Abstract: A generator including: an annular armature connectable to rotate with blades of a wind turbine; an annular stationary field winding assembly coaxial with the armature and separated by a gap from an inside surface of the armature, wherein the field winding include superconducting coils, and support structure connectable to an upper region of a tower of the wind turbine.

Abstract: A superconducting electrical machine has rotor and stator assemblies. A first rotor assembly is located to rotate within a stator assembly and is spaced from the stator assembly by an air gap. A second rotor assembly is located to rotate outside the stator assembly and is also spaced from the stator assembly by an air gap. The first and second rotor assemblies have at least one superconducting field winding. The superconducting field windings are formed from a High Temperature Superconducting (HTS) material such as BSCCO-2223 or YBCO, for example. The double rotor assembly configuration provides a new technical effect over conventional rotating superconducting machines having a single rotor assembly.

Abstract: A generator rotor core (54) carrying superconducting windings (60) and having a shield (426) over the superconducting windings (60) to prevent external magnetic fields from impinging the windings. Axial shield edges (430/434) mate with corresponding features of the rotor core (54) or with structures affixed to or supported by the core (54) to support the shield (426).

Abstract: A series coupling synchronous axial gap type motor where rotors and stators are alternately stacked with required air gaps in the axial direction of a rotary shaft as a main shaft, is provided. The rotors are fixed to the rotary shaft, and the stators are disposed such that they cannot be interlocked with the rotary shaft. A plurality of rotary field bodies are attached to each of the rotor around the axis, and a plurality of armature coils are made to face the rotary field bodies with an air gap therefrom and are attached to each of the stators around the axis such that their magnetic-flux directions are directed toward the axial direction. The armature coils have an empty core, or a core member composed of a magnetic body attached thereto.

Abstract: An efficient and reconfigurable permanent magnet generator that comprises a permanent magnet subassembly and at least one exciter is disclosed. The permanent magnet generator may comprise a mainframe comprising at least one exciter, and a permanent magnet subassembly comprising a plurality of magnets that are arranged to form at least one air gap between facing magnetic poles in which the at least one exciter resides and that are reconfigurable for alternating current or direct current operation by inversion of respective magnetic poles. The at least one exciter may comprise a plurality of alternating layers of a first material and a second material, where the first material may comprise a superconductive material and the second material may comprise a non-superconductive material, and wherein the layers of the superconductive material are thin relative to the thickness of the layers of the non-superconductive material.

Abstract: An inductor-type synchronous machine includes field stators having field elements by which an N-pole and an S-pole are concentrically formed, rotors to which a rotating shaft is fixed and has N-pole inductors disposed so as to face the N-pole of the field elements and S-pole inductors disposed so as to face the S-pole of the field elements, and an armature stator having armature coils disposed so as to face the N-pole inductors and the S-pole inductors.

Abstract: A device for supplying electric energy to at least one superconductor, with the superconductor being cooled in a cooled region to at least one predetermined temperature for achieving superconductivity, includes at least one electric energy source, and a transformer for transferring electric energy between the at least one energy source and the superconductor. The transformer has a primary winding electrically connected with the energy source and a secondary winding electrically connected with the superconductor, wherein at least the secondary winding of the transformer is arranged within the cooled region.

Abstract: A superconducting rotating machine includes a stator assembly having at least one stator coil assembly. A rotor assembly, which includes an axial shaft, is configured to rotate within the stator assembly. The rotor assembly includes at least one superconducting winding assembly. A first and second end plate are rigidly attached to the axial shaft at distal ends of the at least one superconducting winding assembly. An asynchronous field filtering shield surrounds the at least one superconducting winding assembly. A first interconnection assembly connects the shield to the first end plate. The first interconnection assembly allows for axial movement between the shield and the first end plate but restricts tangential movement between the same.

Abstract: A superconductive article is disclosed, having a substrate a buffer layer overlying the substrate, and a superconductive layer overlying the buffer layer. According to embodiments, the article may have low density characteristics, associated with the article as a whole and/or individual layers of the article. The article may be embodied in the form of long length conductors, coiled long length conductors, and machines incorporating such coils, for example.

Abstract: A system for pumping or mixing a fluid using a levitating, rotating pumping or mixing element and various other components for use in a pumping or mixing system are disclosed. The pumping or mixing element is placed in a fluid-containing vessel in close proximity to a superconducting element. A cooling source thermally linked to the superconducting element provides the necessary cooling to induce levitation in the pumping or mixing element. The superconducting element may be thermally isolated, such that the pumping or mixing element, the vessel, and any fluid contained therein are not exposed to the cold temperatures required to produce the desired superconductive effects and the resulting levitation. By using means external to the vessel to rotate and/or stabilize the pumping or mixing element levitating in the fluid, including possibly rotating the superconducting element itself or moving it relative to the vessel, the desired effective pumping or mixing action may be provided.

Abstract: A device (1) for treating objects, in particular silicon wafers (2), with a fluid (3), comprising a container (4) that holds the fluid (3); a rotatable carrying arrangement (5) for accommodation of the objects to be treated, which is disposed at least partially in the container (4); and a rotatably drivable shaft, which is run on at least one bearing (13, 14) and joined to the carrying arrangement (5); with the bearing (13, 14) including a first bearing member (22), which is joined to the shaft, and a second bearing member (24), which adjoins the first bearing member (22) and contains superconductive material; with the first bearing member (22) being kept spaced from the second bearing member (24) by magnetic forces.