The disclosure relates to a system having an electric machine with a superconductive component cooled using a cryogenic liquid, and in particular to the full utilization of the refrigeration power available from vaporization of the cryogenic coolant. The system also has a fuel cell, in which an operating medium may be reacted to provide electrical energy. The coolant is fed in liquid form to the superconductive component to cool the component, utilizing the vaporization enthalpy of the coolant. The coolant is then fed in gaseous form to a further component of the machine to cool the component, utilizing the heating enthalpy of the coolant. The now heated coolant is fed to the fuel cell, which uses the coolant supplied to the fuel cell as an operating medium and reacts it.

A rotor for an electrical machine with a central rotor axis, the rotor includes at least one superconducting coil arrangement, a cooling system for cooling the coil arrangement to a cryogenic operating temperature, and a carrying body which mechanically carries at least one coil arrangement from a radially inner side of the coil arrangement. The carrying body has a substantially cylindrical outer contour. The carrying body is predominantly composed of an amagnetic material which has a density of at most 4.6 g/cm3 and a thermal conductivity of at least 10 W/(m-K). The carrying body is designed to thermally couple the superconducting coil arrangement to the cooling system. An electrical machine has a rotor of this kind.

A rotor for an electrical machine with a central rotor axis, the rotor includes at least one superconducting coil arrangement, a cooling system for cooling the coil arrangement to a cryogenic operating temperature, and a carrying body which mechanically carries at least one coil arrangement from a radially inner side of the coil arrangement. The carrying body has a substantially cylindrical outer contour. The carrying body is predominantly composed of an amagnetic material which has a density of at most 4.6 g/cm3 and a thermal conductivity of at least 10 W/(m-K). The carrying body is designed to thermally couple the superconducting coil arrangement to the cooling system. An electrical machine has a rotor of this kind.

Various embodiments may include a drone for triggering sea mines by means of an external magnetic field. For example a drone may include: a drive having an electric motor; the electric motor comprising a stator and a rotor mounted on a shaft. The stator includes a stator winding arranged on a first carrier. The rotor includes a second carrier and a magnetic or electromagnetic element arranged on the second carrier. The element may be configured to magnetically interact with the stator winding to form a superordinate magnetic field during operation of the electric motor. During operation, the electric motor forms an external magnetic field outside of the electric motor with a magnetic flux density of at least 0.5 mT.

Various embodiments may include a drone for triggering sea mines by means of an external magnetic field. For example a drone may include: a drive having an electric motor; the electric motor comprising a stator and a rotor mounted on a shaft. The stator includes a stator winding arranged on a first carrier. The rotor includes a second carrier and a magnetic or electromagnetic element arranged on the second carrier. The element may be configured to magnetically interact with the stator winding to form a superordinate magnetic field during operation of the electric motor. During operation, the electric motor forms an external magnetic field outside of the electric motor with a magnetic flux density of at least 0.5 mT.

An annular rotating armature is presented. The annular rotating armature includes an armature winding having a plurality of coils, an armature support structure and a magnetic shield disposed between the armature winding and the armature support structure. The magnetic shield having a first magnetic shield ring, a second magnetic shield ring disposed concentric to the first magnetic shield ring and coupled to the first magnetic shield ring via a magnetic shield bridge link. An air gap is formed between the first magnetic shield ring and the second magnetic shield ring. The magnetic shield bridge link is disposed within the air gap. A superconducting generator including the annular rotating armature and a wind turbine having such superconducting generator are also presented.

A cooling system for cooling an electric generator having a stator, a rotor and one or more superconducting coils is provided. The cooling system includes: at least a first cooling unit for cooling at least one of the stator and the rotor, at least a second cooling unit for cooling the superconducting coils, the second cooling unit being thermally connected to the first cooling unit, the first cooling unit providing a hot source for the second cooling unit.

A cooling system for cooling an electric generator having a stator, a rotor and one or more superconducting coils is provided. The cooling system includes: at least a first cooling unit for cooling at least one of the stator and the rotor, at least a second cooling unit for cooling the superconducting coils, the second cooling unit being thermally connected to the first cooling unit, the first cooling unit providing a hot source for the second cooling unit.

An annular field of a superconducting generator includes a partial cryogenic shielding assembly. The annular field has a superconducting field winding surrounded by a thermal shield. The thermal shield is surrounded by a housing defining an insulating vacuum enclosure. The annular field further includes a torque tube assembly disposed within the housing and coupling the thermal shield to the housing. A flexible blanket of multi-layer thermal insulation is disposed within the vacuum enclosure, generally surrounding the thermal shield and extending generally between the housing and the thermal shield. The annular field further includes a partial cryogenic shielding assembly including a floating shield disposed within the vacuum enclosure, between the housing and the thermal shield. The floating shield extends only a portion of an overall length of the housing. The floating shield includes an insulative stack of multi-layer thermal insulation. A superconducting generator and a wind turbine utilizing the superconducting generator with improved partial shielding are disclosed.

An annular field of a superconducting generator includes a partial cryogenic shielding assembly. The annular field has a superconducting field winding surrounded by a thermal shield. The thermal shield is surrounded by a housing defining an insulating vacuum enclosure. The annular field further includes a torque tube assembly disposed within the housing and coupling the thermal shield to the housing. A flexible blanket of multi-layer thermal insulation is disposed within the vacuum enclosure, generally surrounding the thermal shield and extending generally between the housing and the thermal shield. The annular field further includes a partial cryogenic shielding assembly including a floating shield disposed within the vacuum enclosure, between the housing and the thermal shield. The floating shield extends only a portion of an overall length of the housing. The floating shield includes an insulative stack of multi-layer thermal insulation. A superconducting generator and a wind turbine utilizing the superconducting generator with improved partial shielding are disclosed.