# US 12,184,153 B2 · Superconducting induction rotating machine, and superconducting drive force generating system using said superconducting induction rotating machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,153 B2 - Document ID: US12184153B2 - Status: Granted - Kind: B2 - Application number: 17/594,553 - Filed: 2020-04-24 - Published: 2022-07-07 - Granted: 2024-12-31 - Earliest claimed: 2019-04-24 - Assignees: Kyushu University, National University Corporation; National Institute of Advanced Industrial Science and Technology - Applicants: Kyushu University, National University Corporation; National Institute of Advanced Industrial Science and Technology - Inventors: Masataka Iwakuma; Teruo Izumi - Web page: https://patentgrep.com/patent/US12184153B2 ## CPC - H02K 55/00: Dynamo-electric machines having windings operating at cryogenic temperatures - B64D 27/33: Hybrid electric aircraft - H02K 1/16: Stator cores with slots for windings - H02K 1/26: Rotor cores with slots for windings - H02K 3/02: Windings characterised by the conductor material - Y02E 40/60: Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract According to the present invention, there is provided a superconducting induction rotating machine 1 that has a stator for which a plurality of superconducting armature coils are placed along the circumferential direction, and a rotor provided rotatably around a central axis line in a state opposing the stator with a predetermined gap interposed, wherein the rotor is configured of a complex consisting of a cylindrical electrically conductive material layer disposed on a side opposing the stator, and a magnetic material layer disposed on an opposite side to the side opposing the stator of the electrically conductive material layer, and wherein the superconducting induction rotating machine 1 rotationally drives the rotor by generating a rotational torque in the rotor with a rotating magnetic field created by the armature coils while the superconducting armature coils disposed on the stator being cooled to a superconducting state. ## Claims ### Claim 1 A superconducting induction rotating machine, comprising: a stator having a plurality of superconducting armature coils arranged along circumferential direction of the stator, and a rotor rotatably disposed around a central axis line, and opposing the stator across a predetermined gap, wherein the stator comprises a stator main body retaining a plurality of superconducting armature coils, the stator body is made of an electrically non-conductive material that maintains mechanical strength at low temperatures, and the superconductor armature coils do not have cores having a high magnetic permeability material; wherein the rotor is configured as a cylindrical member having a thin peripheral wall defining a cylindrical space inside, wherein the peripheral wall is configured as a complex comprising an electrically conductive material layer that is disposed on a side opposing the stator and faces the stator with a predetermined gap therebetween, and a magnetic material layer disposed on a surface opposite to the side of the electrically conductive material layer that faces the stator, and wherein the superconducting induction rotating machine rotationally drives the rotor by generating a rotational torque in the rotor with a rotating magnetic field created by the armature coils while the superconducting armature coils disposed on the stator being cooled to a superconducting state. ### Claim 2 (depends on 1) The superconducting induction rotating machine of claim 1, wherein a propeller blade for generating propulsion is secured on an inner circumferential surface or an outer circumferential surface of the rotor, and the rotor is rotationally driven to, in turn, drive the propeller blade to thereby generate propulsion. ### Claim 3 (depends on 2) The superconducting induction rotating machine of claim 2, wherein the propeller blade is secured on the inner circumferential surface or the outer circumferential surface of the rotor, which is on the side opposite from the side opposing the stator. ### Claim 4 (depends on 1) The superconducting induction rotating machine of claim 1, wherein the rotor is an outer rotor of the rotating machine, and the electrically conductive material layer is provided on an inner diameter side of the rotor, and the magnetic material layer is provided on an outer diameter side of the rotor. ### Claim 5 (depends on 1) The superconducting induction rotating machine of claim 1, wherein the rotor is an inner rotor of the rotating machine, and the electrically conductive material layer is provided on an outer diameter side of the rotor, and the magnetic material layer is provided on an inner diameter side of the rotor. ### Claim 6 (depends on 1) The superconducting induction rotating machine of claim 1, wherein the rotor is provided with radiation fins. ### Claim 7 (depends on 1) The superconducting induction rotating machine of claim 1, wherein the rotor is defined by embedding strip-shaped superconducting wires in the electrically conductive material layer, and securing short-circuit rings on both ends of the rotor in a direction of the central axis line. ### Claim 8 (depends on 7) The superconducting induction rotating machine of claim 7, wherein both ends of the superconducting wires are curved. ### Claim 9 (depends on 7) The superconducting induction rotating machine of claim 7, wherein grooves are formed in the electrically conductive material layer for embedding the superconducting wires in the grooves. ### Claim 10 (depends on 1) The superconducting induction rotating machine of claim 1, wherein the rotor is defined by arranging the superconducting wires on a surface of the electrically conductive material layer in a circumferential direction and a direction intersecting the circumferential direction, respectively, at predetermined intervals. ### Claim 11 (depends on 1) The superconducting induction rotating machine of claim 1, wherein liquid feed propeller blades are secured in an inner diameter section of the rotor, and a fluid flowing through the inner diameter section is pump-driven along an axis line of the rotor. ### Claim 12 (depends on 11) A fluid drive system having the stator and the rotor of the superconducting rotating machine of claim 11, wherein the stator is attached in a mid-section of a fluid flow pipe with a circular cross section with the stator's central axis positioned concentrically with the fluid flow pipe, and the stator is disposed so that it is exposed inside the fluid flow pipe to thereby pump-drive a fluid flowing through the fluid flow pipe. ### Claim 13 (depends on 12) The fluid drive system of claim 12, wherein the pump-driven fluid is a refrigerant, and the superconducting armature coils are cooled with the refrigerant. ### Claim 14 (depends on 13) The fluid drive system of claim 13, wherein the superconducting induction rotating machines are provided at predetermined intervals along the fluid flow pipe. ### Claim 15 (depends on 1) A superconducting driving force generation system, comprising the superconducting induction rotating machine of claim 1, a superconducting electric generator for supplying electricity to the rotating machine, and a superconducting cable for connecting the electric generator and the rotating machine. ### Claim 16 (depends on 15) The superconducting driving force generation system of claim 15, further comprising: a common freezing system for cooling the superconducting induction rotating machine, the superconducting electric generator and the superconducting cable. ### Claim 17 (depends on 15) The superconducting driving force generation system of claim 15, further comprising: a gas turbine engine for driving the superconducting electric generator, wherein the gas turbine engine uses a LNG having a refrigerant function or a gas made of a liquid hydrogen treated by a freezing system. ### Claim 18 A superconducting induction rotating machine, comprising: a stator having a plurality of superconducting armature coils arranged along circumferential direction of the stator, and a rotor rotatably disposed around a central axis line, and opposing the stator across a predetermined gap, wherein the rotor is configured of a complex comprising a cylindrical electrically conductive material layer disposed on a side opposing the stator and a magnetic material layer disposed on a side opposite from the electrically conductive material layer's side opposing the stator, and wherein the superconducting induction rotating machine rotationally drives the rotor by generating a rotational torque in the rotor with a rotating magnetic field created by the armature coils while the superconducting armature coils disposed on the stator being cooled to a superconducting state; wherein a tread body for generating propulsion is secured on an inner circumferential surface or an outer circumferential surface of the rotor, and the rotor is rotationally driven to, in turn, drive the tread body to thereby generate propulsion, the tread body is for transmitting a driving force from the rotating machine by friction with an object, wherein the tread body is secured on the inner circumferential surface or the outer circumferential surface of the rotor, which is on the side opposite from the side opposing the stator. ### Claim 19 An aircraft comprising a superconducting driving force generation system, the superconducting driving force generation system, comprising: a superconducting induction rotating machine, the superconducting induction rotating machine comprising: a stator having a plurality of superconducting armature coils arranged along circumferential direction of the stator, and a rotor rotatably disposed around a central axis line, and opposing the stator across a predetermined gap, wherein the rotor is configured of a complex comprising a cylindrical electrically conductive material layer disposed on a side opposing the stator and a magnetic material layer disposed on a side opposite from the electrically conductive material layer's side opposing the stator, and wherein the superconducting induction rotating machine rotationally drives the rotor by generating a rotational torque in the rotor with a rotating magnetic field created by the armature coils while the superconducting armature coils disposed on the stator being cooled to a superconducting state; a superconducting electric generator for supplying electricity to the rotating machine; and a superconducting cable for connecting the electric generator and the rotating machine; wherein the superconducting induction rotating machine is installed in parallel on an upper surface of main wings of the aircraft.