Abstract: An apparatus and a method for cooling a super conducting machine are disclosed, in which at least two condenser areas each make thermal contact with a cold head, and in which the at least two condenser areas each have a connecting line, via which the at least two condenser areas are connected fluidically to an evaporator area. A liquid cooling fluid can be moved or pumped from at least one condenser area into the evaporator area by way of a temperature difference, and a pressure difference associated therewith, in the at least two condenser areas.

Abstract: A cooling device is disclosed for cooling a superconductor, wherein the cooling device includes a linear compressor for compressing a working medium and a cooling unit for providing a cooling power to a cryogenic coolant of the superconductor by expanding the working medium. The linear compressor includes two pistons of which at least one, preferably both synchronously relative to each other, are displaceable at a frequency and a stroke linear to the other piston, wherein a defined cooling power can be generated at a good efficiency so that the cooling device is suitable for use particularly in mobile installations, such as ships. To this end, according to at least one embodiment of the invention, the stroke of the at least one displaceable piston is controlled at a preferably prescribed target value.

Abstract: An electric machine contains a rotor which contains a first longitudinal section at the ambient air temperature and a second longitudinal section cooled at least partially to cryogenic temperature, a coolant inlet pipe extending into the second longitudinal section, wherein the inlet pipe is set at a distance from the rotor by a radial gap, wherein the inlet pipe in the first longitudinal section is mounted by at least two bearings, wherein the bearings are distributed on axial positions in such a way that upon action of a maximum radial force on the inlet pipe the pipe has a maximum deflection which is smaller than the radial gap. In a method for determining the axial positions, various batches of potential locations are chosen for the axial positions of the bearings, according to potential locations which has a minimum gap greater than zero.

Abstract: A pulsed magnetic field is generated by a device having a magnet to be operated in pulse operation which contains at least one superconductive refrigerant-free winding that is disk-shaped or saddle-shaped. Also included is a refrigerating unit which has at least one cold head. A line system, having a refrigerant circulating in it according to a thermosiphon effect, thermally couples the winding to the cold head. The line system has a plurality of separate pipes lying next to one another. The pipes, open onto a common refrigerant distributor and closed at the other end, are thermally coupled to the surface of the disk-shaped or saddle-shaped winding.

Abstract: A device for cooling superconducting machines has a closed thermal siphon system which can be filled with a liquid coolant and has an evaporator for evaporating the liquid coolant. In order to improve the cooling performance of the device, the surface area of the evaporator which can be wetted with the liquid coolant is increased.

Abstract: A heat pipe arranged between warm and cold connection elements is intended to be filled at least partially with a refrigerant, which can be circulated in the heat pipe by a thermosiphon effect. The parts of a device, particularly in superconducting technology, which are to be cooled are connected to the warm connection element and a heat sink is connected to the cold connection element. To thermally separate the warm and cold connection elements, the refrigerant can be pumped off through the pipeline connected to the interior of the heat pipe.

Abstract: The invention relates to an electric machine (2) comprising a rotor (6) that contains a shaft (18, 22) that is located, when in operation, in the ambient temperature range, and a superconducting rotor winding (30) that is cooled to a cryogenic temperature when in operation and which is arranged on the shaft (18, 22). Said machine also comprises a cooling system (8) for cooling the rotor winding (30), said system comprises a compensation pressure reservoir (50, 64) for a cooling medium (42). In said electric machine, the compensation pressure reservoir (50, 64) is arranged on the shaft (18, 22).

Abstract: A rotor for an electrical machine, in particular a synchronous machine has a rotor axis which defines a rotor shaft. The rotor has a winding support which is arranged on the rotor shaft such that they rotate together, in such a way that it surrounds the rotor shaft in a centre section with respect to the rotor axis. The winding support is fitted with a superconducting rotor winding. The rotor has a sleeve which at least radially surrounds the winding support and the rotor winding with respect to the rotor axis. At least in the area, in which it radially surrounds the winding support and the superconducting rotor winding, the sleeve is formed integrally from a metal alloy, which is non-magnetic, has an electrical conductivity of at least 60% of the electrical conductivity of copper at 20° C., has a mechanical tensile strength of at least 250 N/mm2 at 200° C. and has a 0.2% proof stress of at least 200 N/mm2 at 200° C.

Abstract: An energy system, in at least one embodiment, includes an energy production device for production of energy for the energy system with the aid of an working medium, a superconductor for low-loss conduction of electrical energy in the energy system, and a cooling device for cooling of the superconductor with the aid of a liquid phase of a cooling medium. The liquid phase of the cooling medium is, according to at least one embodiment of the invention, produced in the cooling device by condensation of a gaseous phase of the cooling medium, with the condensation of the gaseous phase of the cooling medium taking place by heat transfer from the gaseous phase of the cooling medium to the working medium. The overall efficiency of the energy system can improved by the heat transfer step.

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: The invention relates to an electric machine (2) comprising a rotor (6) that contains a shaft (18, 22) that is located, when in operation, in the ambient temperature range, and a superconducting rotor winding (30) that is cooled to a cryogenic temperature when in operation and which is arranged on the shaft (18,22). Said machine also comprises a cooling system (8) for cooling the rotor winding (30), said system comprises a compensation pressure reservoir (50, 64) for a cooling medium (42). In said electric machine, the compensation pressure reservoir (50, 64) is arranged on the shaft (18, 22).

Abstract: A superconducting machine device is disclosed including a machine; a rotor including a superconductive coil; and a cooling system including at least one incline-intolerant component for cooling the coil. In at least one embodiment, at least one component is held by a carrier compensating for an incline of the machine device.

Abstract: The invention relates to a refrigerating arrangement (100) comprising a hot connection element and a cold connection element (101, 103) and a heat exchanger tube arranged between said connection elements (101, 103). The heat exchanger tube (105) is to be at least partially filled with a liquid (106) that can be circulated in the heat exchanger tube (105) by a thermosiphon effect. The parts (102) to be cooled of a device, especially used in superconductivity technology, are connected to the hot connection element (101), and a heat sink (104) is connected to the cold connection element (103). In order to thermally separate the connection elements (101, 103), the liquid (106) can be pumped out by means of a pipeline (107) connected to the inside of the heat exchanger tube (105).

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: The machine device comprises a motor (2) with a rotor (5) rotating about an axis (A), the superconducting winding of which is coupled with thermal conduction to a central refrigerant cavity (12). The cavity (12) forms a single-tube system, together with the line sections (22) laterally connected thereto and a condenser chamber (18) of a refrigeration unit, located outside the motor (2), in which a refrigerant (k, k?) circulates as result of a thermal siphon effect. According to the invention, the refrigerant supply to the central cavity (12) is maintained, even with inclined positions (d) for the rotor (5), whereby pressurization means are provided, which generate pressure pulses of gaseous refrigerant, acting on the liquid refrigerant (k) in the condenser chamber (18) or the connected line sections (22).

Abstract: A superconducting device has a cryosystem to whose cryogenic medium a superconducting appliance and a superconducting switching path (which is electrically connected to it and can be activated thermally by means of a heater) of a superconducting switch are thermally coupled. A pipeline, to whose end the superconducting switching path is thermally coupled, is connected to a coolant area of at least one superconducting appliance. To ensure reliable heating of the switching path when the heater is activated, the pipeline has a cross-sectional constriction which impedes the heat exchange with the coolant area.

Abstract: A heat pipe arranged between warm and cold connection elements is intended to be filled at least partially with a refrigerant, which can be circulated in the heat pipe by a thermosiphon effect. The parts of a device, particularly in superconducting technology, which are to be cooled are connected to the warm connection element and a heat sink is connected to the cold connection element. To thermally separate the warm and cold connection elements, the refrigerant can be pumped off through the pipeline connected to the interior of the heat pipe.

Abstract: The superconducting device has a cryogenic system to whose first refrigerant there is thermally coupled a superconducting unit and a superconducting switching path, which is electrically connected to said unit and is to be activated thermally by a heater, of a superconducting switch. A first pipeline to whose end the superconducting switching path is thermally coupled is to be connected to a refrigerant space of the superconducting unit. In order to ensure reliable heating of the switching path upon activation of the heater, the first pipeline is to have a cross sectional constriction impeding the exchange of heat with the refrigerant space. Moreover, the switching path is to be thermally coupled to a comparatively higher temperature level via a further, closed pipeline with a second refrigerant.

Abstract: An electric machine has a rotor that is rotatable about an axis of rotation, and an especially superconducting winding which is to be cooled to a low temperature. The winding is enveloped by a securing means with a wrap. The outer contour of the wrap of the securing means increases from a smaller outside diameter to a greater outside diameter in the axial direction. The wrap is surrounded in a force-fitting manner by several securing rings which are arranged one behind another and have an inside diameter which conforms to the respective outside diameter of the outer contour.

Abstract: The invention relates to an insulated container (11) which can be evacuated and has an application (12) to be cooled, in which insulated container (11) a vacuum can be built up by means of a vacuum pump (22). In order to allow the vacuum pump (22) to be switched off during normal operation, a getter material (26) is arranged in the insulated container and binds gas components which penetrate into the insulated container as a result of unavoidable leakages. The invention provides for the getter material to be accommodated in maintenance areas (20), which can be disconnected by means of valves (21) from the working area (18) which contains the application (12). This allows the getter materials (26) in each maintenance area to be replaced or regenerated, while the operation of the application (12) to be cooled can be maintained owing to the partitioning of the working area (18) from the maintenance area (20).