Abstract: A strip conductor device includes first and second elongated strip conductor elements, each configured to be coupled at a coupling-in end to a contact device for coupling-in electric current and at a coupling-out end to a contact device for coupling-out electric current. The first elongated strip conductor element is a first strip conductor that has a substrate layer that carries a conductor layer that has barrier elements along a length of the conductor layer. The second elongated strip conductor element is a second strip conductor that has a substrate layer that carries a conductor layer that has barrier elements along a length of the conductor layer. The first strip conductor element forms a layer arrangement with the second strip conductor element and the coupling-in ends and the coupling-out ends of the first and second strip conductor elements lie one above the other.

Abstract: A magnet device based on the Bitter principle includes a plurality of conductor layers and a plurality of substrate layers. Each respective substrate layer carries a corresponding conductor layer, and each respective substrate layer and corresponding conductor layer together form a respective ring having a radial slot. The plurality of conductor layers and the plurality of substrate layers together form three or more rings in a spiral arrangement with an initial ring, an end ring, and one or more middle rings. The initial ring and the end ring are, via a contact section, in current-conducting contact with at least one respective middle ring. Each middle ring is, via a contact section, in current-conducting contact with two other rings. The three or more rings are arranged such that a ring with a downward-facing conductor layer follows a ring with an upward-facing conductor layer.

Abstract: Various embodiments include a superconducting coil device comprising: a coil winding with at least one turn of a superconducting strip conductor; wherein the strip conductor has a first main face and a second main face. The coil winding includes a turning region wherein the strip conductor is bent such that, in the turning region, the strip conductor has a distinct change of direction in a longitudinal direction and simultaneously changes the orientation of both the first main face and the second main face with respect to a central axis of the coil device.

Abstract: The present disclosure relates to DC transmission. Some embodiments may include a device for DC transmission comprising: a superconducting transmission line including a superconducting conductor element; and a cooling device for cooling an inner region of the transmission line with a fluid coolant to a temperature below a critical temperature of the superconducting conductor element. The superconducting transmission line may comprise a vacuum-insulated sleeve thermally isolating the inner region of the transmission line from a warmer outer surrounding area. The cooling device may comprise a feed device feeding coolant at an end region of the transmission line into the inner region of the transmission line. The transmission line may be free of internally arranged feed devices for feeding coolant at locations away from the end region.

Abstract: An electric coil device includes a winding support which is made of an elongated hollow tube that has the shape of a ring such that a higher-order loop of the winding device is formed entirely by the annular shape of the winding support, and a winding which is made of a superconductive conductor and is attached to the winding support. The superconductive conductor is wound in a helical manner about the hollow tube in a plurality of individual windings such that at least one higher-order winding of the entire helix is produced by the annular shape of the winding support. The interior of the hollow tube is designed as a coolant channel for circulating a fluid coolant. A rotor for an electric machine includes at least one such coil device.

Abstract: The disclosure relates to a rotor for an electrical machine, having a central rotor axis. The rotor includes a rotor carrier and at least one superconducting permanent magnet carried mechanically by the rotor carrier. The rotor further includes a magnetization device having at least one superconducting coil element which surrounds the superconducting permanent magnet and which is suitable for magnetization of the superconducting permanent magnet. Furthermore, an electrical machine including such a rotor and a method for magnetization of at least one superconducting permanent magnet of such a rotor are disclosed.

Abstract: An electric coil device includes a winding support which is made of an elongated hollow tube that has the shape of a ring such that a higher-order loop of the winding device is formed entirely by the annular shape of the winding support, and a winding which is made of a superconductive conductor and is attached to the winding support. The superconductive conductor is wound in a helical manner about the hollow tube in a plurality of individual windings such that at least one higher-order winding of the entire helix is produced by the annular shape of the winding support. The interior of the hollow tube is designed as a coolant channel for circulating a fluid coolant. A rotor for an electric machine includes at least one such coil device.

Abstract: Various embodiments include a superconducting coil device comprising: a coil winding with at least one turn of a superconducting strip conductor; wherein the strip conductor has a first main face and a second main face. The coil winding includes a turning region wherein the strip conductor is bent such that, in the turning region, the strip conductor has a distinct change of direction in a longitudinal direction and simultaneously changes the orientation of both the first main face and the second main face with respect to a central axis of the coil device.

Abstract: Various embodiments may include an electric conductor for producing a stator winding of a stator of an electric machine comprising: a plurality of filaments of a material normally conductive at 4.2 K; and a normally conductive matrix material. The plurality of filaments are embedded in the matrix material to form a monolithic composite. The matrix material is more electrically resistive than the filaments.

Abstract: Various embodiments may include a superconductor device for operation in an external alternating magnetic field comprising: two superconducting contact elements; a current-conducting section connecting the elements in a longitudinal direction corresponding to the direction of the flow of current; a superconductor layer applied to a substrate including a recess defining individual filaments. The individual filaments define current paths. At least two adjacent filaments are conductively connected in a crossing region formed on the substrate. The crossing region connects four current paths through omission of the recess. The device also includes a resistance barrier in a current paths of two adjacent filaments, which current paths are opposite with respect to the crossing and offset in the longitudinal direction and a transverse direction, perpendicular to the longitudinal direction, of a plane of the layer.

Abstract: The present disclosure relates to vehicles. Various embodiments of the teachings thereof may include energy transmission apparatus for transmitting energy within a vehicle, in particular an aircraft. For example, an energy transmission apparatus may include: a superconducting cable run having a superconducting conductor element. The superconducting cable system transmits electrical energy with a power of at least 1 MW. The superconducting cable system has a weight per unit length of at most 2 kg/m.

Abstract: The disclosure relates to a drive system and to a method for providing kinetic energy for a propulsion device of an aircraft. The drive system is designed as a series hybrid system, which has an electric motor for driving the propulsion device, a generator for providing the electrical energy for the electric motor, and an internal combustion engine for providing the kinetic energy for operating the generator. The generator is designed as a superconducting generator. Hydrogen is used as a coolant for the generator. As soon as the hydrogen in the region surrounding the generator exceeds a specified temperature, the hydrogen is drawn from the generator in the gaseous state and fed to a device, which processes the hydrogen in such a way that energy that may be used in the drive system is provided. The device may be a fuel cell and/or the internal combustion engine designed as a hydrogen turbine, for example.

Abstract: The present disclosure relates to transformers. Teachings thereof may be embodied in a transformation unit having a primary winding and a secondary winding. For example, a transformer may include: a first transformation unit with a primary winding and a secondary winding; and at least one high-temperature superconducting conductor in each of the two windings. Each of the two windings is wound around a first annular base structure common to both windings in a plurality of turns such that both of the two windings extend over a jointly-wrapped part of the circumferential extent of the annular base structure.

Abstract: The present disclosure relates to DC transmission. Some embodiments may include a device for DC transmission comprising: a superconducting transmission line including a superconducting conductor element; and a cooling device for cooling an inner region of the transmission line with a fluid coolant to a temperature below a critical temperature of the superconducting conductor element. The superconducting transmission line may comprise a vacuum-insulated sleeve thermally isolating the inner region of the transmission line from a warmer outer surrounding area. The cooling device may comprise a feed device feeding coolant at an end region of the transmission line into the inner region of the transmission line. The transmission line may be free of internally arranged feed devices for feeding coolant at locations away from the end region.

Abstract: The present disclosure relates to a cooling systems. The teachings thereof may be embodied in apparati for cooling an energy conversion apparatus having an electric machine comprising a rotor rotating around a central shaft and at least one first turbine arranged on the same shaft. The cooling apparatus may include at least one first internal cavity of the shaft for transporting coolant into a region within the rotor. The first internal cavity may extend axially through the first turbine and through an axial intermediate space between the first turbine and rotor.

Abstract: An electric machine may include at least one stator and at least one rotor mounted to rotate relative to the stator, the stator and/or the rotor including at least one electrically conductive conductor winding, wherein at least some sections of the at least one electrically conductive conductor winding are formed from nano-scale carbon structures combined into at least one textile structure, or include nano-scale carbon structures combined into at least one textile structure.

Abstract: A cage rotor for an electric machine may include a rotor core and an electrically conductive rotor cage arranged around the rotor core, wherein the rotor cage includes carbon nanotubes. An electric machine including such a cage rotor is also disclosed.

Abstract: A superconductive coil device has a cylindrical carrier body at least two coil windings of a superconductive strip conductor that has a doubly connected topology and a continuous superconductive layer inside the doubly connected topology, and two conductor branches in two oppositely directed helical windings around the cylindrical carrier body. In a production method for such a superconductive coil device, the superconductive strip conductor with the doubly connected topology is produced by slitting a carrier strip along the length of the superconductive strip conductor, before or after applying the superconductive layer, and the slitted superconductive strip conductor is then wound on the cylinder carrier body in oppositely directed helical windings.

Abstract: A process applies a polymer to at least one individual conductor of a high-temperature superconductor (HTS) composite in the manner of a Roebel conductor. The at least one individual conductor includes a substrate and a superconducting layer. Particles are applied to the individual conductor. Then, a thermal treatment is performed which results in partial or complete melting of the particles and, after cooling, in a polymer layer on the individual conductor.

Abstract: A continuous process produces superconducting layers on substrates, such as a superconducting layer of MgB2 produced by aerosol deposition on the substrate.