Abstract: The present disclosure relates to a superconducting rotating electrical machine and a manufacturing method for a high temperature superconducting film thereof. The superconducting rotating electrical machine includes a stator, and a rotor rotatable with respect to the stator, the rotor having a rotary shaft and a rotor winding. Here, the rotor winding includes tubes disposed on a circumference of the rotary shaft and each forming a passage for a cooling fluid therein, superconducting wires accommodated within the tubes, and a cooling fluid flowing through the inside of the tubes. This configuration may allow for direct heat exchange between the superconducting wires and a refrigerant, resulting in improvement of heat exchange efficiencies of the superconducting wires.

Abstract: Disclosed is a cooling and supporting apparatus for current leads of a superconducting rotating machine. The cooling and supporting apparatus is installed on the current leads, and includes an inner tube provided with a spiral-shaped groove formed in the outer surface thereof and an outer tube provided with a spiral-shaped groove formed in the inner surface thereof, thus preventing heat transferred through the current leads from being directly transferred to a superconducting coil for preventing the deformation of the superconducting coil, and allowing the outer tube from fixedly surrounding the whole current leads for preventing the breakage of the current leads due to centrifugal force of a rotor.

Abstract: A refrigerant gas recycling apparatus for cryogenic cooling device has a first gas storage unit for temporarily storing refrigerant gas discharged from the cryogenic cooling device, a compressor for compressing refrigerant gas stored in the first storage unit, and a second gas storage unit for storing therein refrigerant gas compressed by the compressor and selectively re-supplying compressed refrigerant gas to the cryogenic cooling device using a pressure difference between compressed refrigerant gas and inside of the cooling device. Refrigerant gas discharged from the cryogenic cooling device is compressed and stored in reduced volume, and stored refrigerant gas is re-supplied to the cryogenic cooling device without a separate driving source.

Abstract: A superconductivity rotor has a field coil portion wound with a superconductivity wire, a support portion for supporting the field coil portion, torque tubes positioned at both ends of the support portion and transmitting a torque to an outside from the field coil portion, an inner casing for housing the field coil portion and the support portion; and an outer casing for housing the inner casing and the torque tube. The torque tube consists of a first torque tube positioned at one end of the support portion and a second torque tube positioned at the other end of the support portion. The first torque tube is formed into a vessel shape and has a plurality of engagement holes formed along a periphery thereof so that it is engaged with an engagement member, and the second torque tube comprises a disc-shaped structure consisting of plural plates and main ring-shaped members stacked, and is engaged with an engagement member.

Abstract: Disclosed is a cooling and supporting apparatus for current leads of a superconducting rotating machine. The cooling and supporting apparatus is installed on the current leads, and includes an inner tube provided with a spiral-shaped groove formed in the outer surface thereof and an outer tube provided with a spiral-shaped groove formed in the inner surface thereof, thus preventing heat transferred through the current leads from being directly transferred to a superconducting coil for preventing the deformation of the superconducting coil, and allowing the outer tube from fixedly surrounding the whole current leads for preventing the breakage of the current leads due to centrifugal force of a rotor.

Abstract: A superconductivity rotor has a field coil portion wound with a superconductivity wire, a support portion for supporting the field coil portion, torque tubes positioned at both ends of the support portion and transmitting a torque to an outside from the field coil portion, an inner casing for housing the field coil portion and the support portion; and an outer casing for housing the inner casing and the torque tube. The torque tube consists of a first torque tube positioned at one end of the support portion and a second torque tube positioned at the other end of the support portion. The first torque tube is formed into a vessel shape and has a plurality of engagement holes formed along a periphery thereof so that it is engaged with an engagement member, and the second torque tube comprises a disc-shaped structure consisting of plural plates and main ring-shaped members stacked, and is engaged with an engagement member.

Abstract: A superconductive coil assembly has a bobbin, a coil provided such that a superconductive wire is wound several times around the bobbin, and a pair of heat transfer plates installed to cover the opposite sides of the bobbin and the coil. The heat transfer plate is made of metal material with high thermal conductivity, such as copper or aluminum, and a portion thereof abutted upon the side of the coil is coated with electric insulating material. If adapted to a generator, an electric motor, and so on, the plurality of superconductive coil assemblies is used while being overlapped. In this case, a connection recess is provided to at least one heat transfer plate to enable a portion of the side of the coil to be exposed outside, in order for electrical connection with another superconductive coil assembly.

Abstract: A refrigerant gas recycling apparatus for cryogenic cooling device has a first gas storage unit for temporarily storing refrigerant gas discharged from the cryogenic cooling device, a compressor for compressing refrigerant gas stored in the first storage unit, and a second gas storage unit for storing therein refrigerant gas compressed by the compressor and selectively re-supplying compressed refrigerant gas to the cryogenic cooling device using a pressure difference between compressed refrigerant gas and inside of the cooling device. Refrigerant gas discharged from the cryogenic cooling device is compressed and stored in reduced volume, and stored refrigerant gas is re-supplied to the cryogenic cooling device without a separate driving source.