The invention provides a magnet assembly for a planar electromagnetic motor, the magnet assembly comprising:—a first plurality of superconductive (SC) coils, inside an outer circumference and arranged in a planar pattern such as a rectangular pattern,—a second plurality of SC coils, arranged along an outer boundary of the planar pattern, a coil of the first plurality of SC coils having a first in-plane shape and a coil of the second plurality of SC coils having a second in-plane shape, different from the first in-plane shape, wherein the second plurality of SC coils is arranged at least partly inside the outer circumference.

Various implementations of the invention correspond to an improved vortex flux generator. In some implementations of the invention, the improved vortex flux generator includes a magnetic circuit configured to produce a magnetic field; a quench controller configured to provide a variable current; a vortex material configured to form and subsequently dissipate a vortex in response to the variable current, wherein upon formation of the vortex, a magnetic field density surrounding the vortex is urged to decrease, and wherein upon subsequent dissipation of the vortex, the urging to decrease ceases and the magnetic field density increases prior to a reformation of the vortex, and wherein the decrease of the magnetic field density and the increase of the magnetic field density correspond to a modulation of the magnetic field; an inductor disposed in a vicinity of the vortex such that the modulation of the magnetic field induces an electrical current in the inductor; and a dissipation superconductor electrically disposed in parallel with the vortex material and configured to carry, without quenching, an entirety of the variable current during dissipation of the vortex in the vortex material.

Various implementations of the invention correspond to an improved vortex flux generator. In some implementations of the invention, the improved vortex flux generator includes a magnetic circuit configured to produce a magnetic field; a quench controller configured to provide a variable current; a vortex material configured to form and subsequently dissipate a vortex in response to the variable current, wherein upon formation of the vortex, a magnetic field density surrounding the vortex is urged to decrease, and wherein upon subsequent dissipation of the vortex, the urging to decrease ceases and the magnetic field density increases prior to a reformation of the vortex, and wherein the decrease of the magnetic field density and the increase of the magnetic field density correspond to a modulation of the magnetic field; an inductor disposed in a vicinity of the vortex such that the modulation of the magnetic field induces an electrical current in the inductor; and a dissipation superconductor electrically disposed in parallel with the vortex material and configured to carry, without quenching, an entirety of the variable current during dissipation of the vortex in the vortex material.

A magnetic field generating device includes a superconducting coil formed by winding a superconductive wire material; an unseparated conductor plate which includes an electric conductor and is placed such that the conductor plate is insulated from the superconducting coil and is adjacent to the superconducting coil in a winding axis direction of the superconducting coil, and one of main surfaces of the conductor plate faces the superconducting coil; and a protection circuit which is connected in parallel with the superconducting coil and attenuates a current flowing through the superconducting coil.

A magnetic field generating device includes a superconducting coil formed by winding a superconductive wire material; an unseparated conductor plate which includes an electric conductor and is placed such that the conductor plate is insulated from the superconducting coil and is adjacent to the superconducting coil in a winding axis direction of the superconducting coil, and one of main surfaces of the conductor plate faces the superconducting coil; and a protection circuit which is connected in parallel with the superconducting coil and attenuates a current flowing through the superconducting coil.

A cryogenic refrigerator includes a compressor for installation on a stationary component, an expander for installation on a rotating component, and a rotary joint fluidly coupling the compressor with the expander. The rotary joint includes: a rotor fixed to the rotating component and coaxial with its rotational axis; a stator disposed adjacent to the rotor to form a clearance between the rotor and the stator, and fixed to the stationary component; a first high-pressure flowpath and a second high-pressure flowpath, extending between the rotor and stator through the clearance, and a working-gas sealing area dividing the clearance into a first high-pressure section communicating with the first high-pressure flowpath, and into a second high-pressure section communicating with the second high-pressure flowpath.

A cryogenic refrigerator includes a compressor for installation on a stationary component, an expander for installation on a rotating component, and a rotary joint fluidly coupling the compressor with the expander. The rotary joint includes: a rotor fixed to the rotating component and coaxial with its rotational axis; a stator disposed adjacent to the rotor to form a clearance between the rotor and the stator, and fixed to the stationary component; a first high-pressure flowpath and a second high-pressure flowpath, extending between the rotor and stator through the clearance, and a working-gas sealing area dividing the clearance into a first high-pressure section communicating with the first high-pressure flowpath, and into a second high-pressure section communicating with the second high-pressure flowpath.

The present disclosure relates to a superconducting apparatus. The embodiments may include a system comprising at least two electrical coil devices and a cooling apparatus for cooling the coil devices with the aid of a coolant. For example, a superconducting apparatus may include: two electrical coil devices, wherein at least one comprises a superconducting coil device; a cooling apparatus for the coil devices; and a first connecting line between the two electrical coil devices including both a first electrical conductor connecting the two coil devices and a first coolant pipe transporting coolant between the two coil devices.

The disclosure relates to an electric machine and a hybrid electric vehicle. The electric machine includes at least one first group of superconducting coils arranged to guide a magnetic flow at least along a U-shaped course. The hybrid electric aircraft is, in particular, an aeroplane and has an electric machine of this type.

The disclosure relates to an electric machine and a hybrid electric vehicle. The electric machine includes at least one first group of superconducting coils arranged to guide a magnetic flow at least along a U-shaped course. The hybrid electric aircraft is, in particular, an aeroplane and has an electric machine of this type.