Rotary electric machine

Claim 2

A rotary electric machine comprising at least two parallel discoidal rotors attached at right angles to a shaft, said rotors including an inhomogeneous hard superconductor as the essential constituent thereof, at least one armature coil disposed nonconcentrically in the space between said parallel rotors, said rotors in combination having a magnetic shielding property which provides a cyclic magnetic shielding effect derived from said superconductor in said rotors with respect to said armature coil when they are rotated around said shaft in a magnetic field, a superconducting main field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, superconducting supplemental field coils having the same diameter as said main field coil, said supplemental field coils being placed at the respective ends of said main coil in coaxial relation with said main field coil with gaps therebetween, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective gaps between said main and supplemental field coils for forming a dilute magnetic flux space having axial symmetry with respect to said shaft in a divergent magnetic field near the gaps between said main and supplemental field coils, and cooling means for maintaining said rotors, bearings and main and supplemental field coils in a superconducting state.

Claim 3

A rotary electric machine comprising at least two parallel discoidal rotors composed of an electrical insulator, a plurality of magnetic poles provided along the circumference of said insulator discs, said magnetic poles being formed of pieces of an inhomogeneous hard superconducting material embedded in the portions of said discs, said rotors being attached to a shaft with the magnetic poles of one of said rotors being opposed by the magnetic poles of the other, said rotors being maintained in the superconducting state so as to form a shield against a magnetic field in the areas at which said magnetic poles exist, at least one armature coil disposed in the space between said rotors at a position at which it is inTerlinked by magnetic flux passing through the portions of said rotors other than the magnetic pole portions, a cylinder-type vertical superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil for forming a dilute magnetic flux space comprising a plurality of parallel discs of an inhomogeneous hard superconducting material and a plurality of discs of a normal conductive material alternately laminated together, and cooling means for maintaining said rotors, bearing and field coils in a superconducting state.

Claim 4

A rotary electric machine comprising at least two parallel discoidal rotors composed of an electrical insulator, a plurality of magnetic poles provided along the circumference of said insulator discs, said magnetic poles being formed of pieces of an inhomogeneous hard superconducting material embedded in the portions of said discs, said rotors being attached to a shaft with the magnetic poles of one of said rotors being opposed by the magnetic poles of the other, said rotors being maintained in the superconducting state so as to form a shield against a magnetic field in the areas at which said magnetic poles exist, at least one armature coil disposed in the space between said rotors at a position at which it is inTerlinked by magnetic flux passing through the portions of said rotors other than the magnetic pole portions, a cylinder-type vertical superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil for forming a dilute magnetic flux space comprising a plurality of parallel discs of an inhomogeneous hard superconducting material and a plurality of discs of a normal conductive material alternately laminated together, and cooling means for maintaining said rotors, bearing and field coils in a superconducting state.

Claim 5

A rotary electric machine comprising at least two parallel discoidal rotors composed of an electrical insulator, a plurality of magnetic poles provided along the circumference of said insulator discs, said magnetic poles being formed of pieces of an inhomogeneous hard superconducting material embedded in the portions of said discs, said rotors being attached to a shaft with the magnetic poles of one of said rotors being opposed by the magnetic poles of the other, said rotors being maintained in the superconducting state so as to form a shield against a magnetic field in the areas at which said magnetic poles exist, at least one armature coil disposed in the space between said rotors at a position at which it is interlinked by magnetic flux passing through the portions of said rotors other than the magnetic pole portions, a cylinder-type vertical superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil for forming a dilute magnetic flux space comprising a plurality of parallel discs and rings interposed between said discs, said discs and rings composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coils in a superconducting state.

Claim 6

A rotary electric machine comprising at least two parallel discoidal rotors composed of an electrical insulator, a plurality of magnetic poles provided along the circumference of said insulator discs, said magnetic poles being formed of pieces of an inhomogeneous hard superconducting material embedded in the portions of said discs, said rotors being attached to a shaft with the magnetic poles of one of said rotors being opposed by the magnetic poles of the other, said rotors being maintained in the superconducting state so as to form a shield against a magnetic field in the areas at which said magnetic poles exist, at least one armature coil disposed in the space between said rotors at a position at which it is interlinked by magnetic flux passing through the portions of said rotors other than the magnetic pole portions, a cylinder-type vertical superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil for forming a dilute magnetic flux space comprising a plurality of parallel discs and rings interposed between said discs, said discs and rings composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coils in a superconducting state.

Claim 7

A rotary electric machine comprising at least two discoidal rotors composed of an inhomogeneous hard superconducting material, said rotors being provided with a plurality of slots along the circumference thereof and attached to a shaft in parallel with each other in such a manner that the slots of one of said rotors are opposed by the slots of the other, said rotors having such a magnetic property in their superconducting state that they shield against passage of magnetic flux at portions other than the slot portions, at least one armature coil disposed in the space between said parallel rotors, said coil being disposed at a position at which it is interlinked by magnetic flux passing through the slot portions, a cylinder-type superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil, said bearing means comprising a plurality of parallel discs of an inhomogeneous hard superconducting material and a plurality of discs of a normal conductive material alternately laminated together, and cooling means for maintaining said rotors, bearings and field coils in a superconductive state.

Claim 8

A rotary electric machine comprising at least two discoidal rotors composed of an inhomogeneous hard superconducting material, said rotors being provided with a plurality of slots along the circumference thereof and attached to a shaft in parallel with each other in such a manner that the slots of one of said rotors are opposed by the slots of the other, said rotors having such a magnetic property in their superconducting state that they shield against passage of magnetic flux at portions other than the slot portions, at least one armature coil disposed in the space between said parallel rotors, said coil being disposed at a position at which it is interlinked by magnetic flux passing through the slot portions, a cylinder-type superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil, said bearing means comprising a plurality of parallel discs of an inhomogeneous hard superconducting material and a plurality of discs of a normal conductive material alternately laminated together, and cooling means for maintaining said rotors, bearings and field coils in a superconductive state.

Claim 9

A rotary electric machine comprising at least two discoidal rotors composed of an inhomogeneous hard superconducting material, said rotors being provided with a plurality of slots along the circumference thereof and attached to a shaft in parallel with each other in such a manner that the slots of one of said rotors are opposed by the slots of the other, said rotors having such a magnetic property in their superconducting state that they shield against passage of magnetic flux at portions other than the slot portions, at least one armature coil disposed in the space between said parallel Rotors, said coil being disposed at a position at which it is interlinked by magnetic flux passing through the slot portions, a cylinder-type superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil, said bearing means comprising a plurality of parallel discs and rings interposed between said discs, said discs and rings composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coil in a superconducting state.

Claim 10

A rotary electric machine comprising at least two discoidal rotors composed of an inhomogeneous hard superconducting material, said rotors being provided with a plurality of slots along the circumference thereof and attached to a shaft in parallel with each other in such a manner that the slots of one of said rotors are opposed by the slots of the other, said rotors having such a magnetic property in their superconducting state that they shield against passage of magnetic flux at portions other than the slot portions, at least one armature coil disposed in the space between said parallel Rotors, said coil being disposed at a position at which it is interlinked by magnetic flux passing through the slot portions, a cylinder-type superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective ends of said field coil, said bearing means comprising a plurality of parallel discs and rings interposed between said discs, said discs and rings composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coil in a superconducting state.

Claim 11

A rotary electric machine comprising at least two parallel discoidal rotors composed of an electrical insulator, a plurality of magnetic poles provided along the circumference of said insulator discs, said magnetic poles being formed of pieces of an inhomogeneous hard superconducting material embedded in the portions of said discs, said rotors being attached to a shaft with the magnetic poles of one of said rotors being opposed by the magnetic poles of the other, said rotors being maintained in the superconducting state so as to form a shield against a magnetic field in the areas at which said magnetic poles exist, at least one armature coil disposed in the space between said rotors at a position at which is is interlinked by magnetic flux passing through the portions of said rotors other than the magnetic pole portions, a cylinder-type vertical superconducting main field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two superconducting supplemental field coils having the same diameter as said main field coil, said supplemental field coils being placed at the respective ends of said main field coil in coaxial relation with said main field coil with gaps therebetween, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective gaps between said main and supplemental field coils for forming a dilute magnetic flux space comprising at least one layer composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coils in a superconducting state.

Claim 12

A rotary electric machine comprising at least two parallel discoidal rotors composed of an electrical insulator, a plurality of magnetic poles provided along the circumference of said insulator discs, said magnetic poles being formed of pieces of an inhomogeneous hard superconducting material embedded in the portions of said discs, said rotors being attached to a shaft with the magnetic poles of one of said rotors being opposed by the magnetic poles of the other, said rotors being maintained in the superconducting state so as to form a shield against a magnetic field in the areas at which said magnetic poles exist, at least one armature coil disposed in the space between said rotors at a position at which is is interlinked by magnetic flux passing through the portions of said rotors other than the magnetic pole portions, a cylinder-type vertical superconducting main field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two superconducting supplemental field coils having the same diameter as said main field coil, said supplemental field coils being placed at the respective ends of said main field coil in coaxial relation with said main field coil with gaps therebetween, two bearing means attached to the respective ends of said shaft and located in the vicinity of the respective gaps between said main and supplemental field coils for forming a dilute magnetic flux space comprising at least one layer composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coils in a superconducting state.

Claim 13

A rotary electric machine as claimed in claim 6, wherein said bearing means comprise a plurality of parallel discs of an inhomogeneous hard superconducting material and a plurality of discs of a normal conductive material alternately laminated together.

Claim 14

A rotary electric machine as claimed in claim 6, wherein said bearing means comprise a plurality of parallel discs and rings being interposed between said discs, and said discs and rings are composed of an inhomogeneous hard superconducting material.

Claim 15

A rotary electric machine comprising at least two discoidal rotors composed of an inhomogeneous hard superconducting material, said rotors being provided with a plurality of slots along the circumference thereof and attached to a shaft in parallel with each other in such a manner that the slots of one of said rotors are opposed by the slots of the other, said rotors having such a magnetic property in their superconducting state that they shield against passage of magnetic flux at portions other than the slot portions, at least one armature coil disposed in the space between said parallel rotors, said coil being disposed at a position at which it is interlinked by magnetic flux passing through the slot portions, a cylinder-type vertical main superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two superconducting supplemental field coils having the same diameter as said main field coil, said supplemental field coils being placed at the respective ends of said main field coil in coaxial relation with said main field coil with gaps therebetween, two bearing means attached to the respective ends of said shaft aNd located in the vicinity of the respective gaps between said main and supplemental field coils, said bearing means comprising at least one layer composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coils in a superconducting state.

Claim 16

A rotary electric machine comprising at least two discoidal rotors composed of an inhomogeneous hard superconducting material, said rotors being provided with a plurality of slots along the circumference thereof and attached to a shaft in parallel with each other in such a manner that the slots of one of said rotors are opposed by the slots of the other, said rotors having such a magnetic property in their superconducting state that they shield against passage of magnetic flux at portions other than the slot portions, at least one armature coil disposed in the space between said parallel rotors, said coil being disposed at a position at which it is interlinked by magnetic flux passing through the slot portions, a cylinder-type vertical main superconducting field coil for externally applying a uniform magnetic field to said rotors in the axial direction of said shaft, two superconducting supplemental field coils having the same diameter as said main field coil, said supplemental field coils being placed at the respective ends of said main field coil in coaxial relation with said main field coil with gaps therebetween, two bearing means attached to the respective ends of said shaft aNd located in the vicinity of the respective gaps between said main and supplemental field coils, said bearing means comprising at least one layer composed of an inhomogeneous hard superconducting material, and cooling means for maintaining said rotors, bearings and field coils in a superconducting state.

Claim 17

A rotary electric machine as claimed in claim 9, wherein said bearing means comprise a plurality of parallel discs of an inhomogeneous hard superconducting material and a plurality of discs of a normal conductive material alternately laminated together.

Claim 18

A rotary electric machine as claimed in claim 9, wherein said bearing means comprise a plurality of parallel discs and rings interposed between said discs, and said discs and rings are composed of an inhomogeneous hard superconducting material.