# US 12,600,488 B2 · Flux barrier electric machine with superconducting induced element and inductor

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- Number: US 12,600,488 B2
- Document ID: US12600488B2
- Status: Granted
- Kind: B2
- Application number: 17/782,518
- Filed: 2020-12-01
- Published: 2023-01-05
- Granted: 2026-04-14
- Earliest claimed: 2019-12-04
- Assignees: Safran; Universite De Lorraine
- Applicants: Safran; Universite De Lorraine
- Inventors: Sabrina Siham Ayat; Alexandre Colle; Rémy Biaujaud
- Web page: https://patentgrep.com/patent/US12600488B2

## CPC

- B64D 33/08: of power plant cooling systems
- H01F 6/06: Coils, e.g. winding, insulating, terminating or casing arrangements therefor
- H02K 9/00: Arrangements for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24)
- H02K 55/00: Dynamo-electric machines having windings operating at cryogenic temperatures
- B64D 27/34: All-electric aircraft
- Y02E 40/60: Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A superconducting flux barrier electric machine, including one induced element and one inductor, the inductor including one superconducting induction coil and a rotary portion forming a rotor, and the induced element including one arrangement of electromagnetic coils coaxial with the superconducting induction coil, the rotor comprising superconducting pellets mounted radially inside the superconducting coil on an axis of rotation of the machine, where the electromagnetic coils are made of superconducting material and the induced element and the inductor are arranged in an assembly forming a cooling chamber provided with specific cooling means for the superconducting elements of the induced element and the inductor.

## Claims

### Claim 1

A superconducting flux barrier electric machine, comprising:
an induced element, and
an inductor, wherein the inductor comprises a superconducting induction coil and a rotary portion forming a rotor, and the induced element comprises an arrangement of electromagnetic coils coaxial with the superconducting induction coil,
wherein the rotor comprises superconducting pellets mounted radially inside the superconducting coil on an axis of rotation of the machine, the superconducting pellets being distributed in the orthoradial direction of the superconducting machine and configured to form flux barriers, wherein the electromagnetic coils are made of a superconducting material and wherein the induced element and the inductor are arranged in an assembly forming a cooling chamber provided with at least one vacuum chamber configured to cool down the superconducting induction coil, electromagnetic coils, and superconducting pellets, wherein the electromagnetic coils comprise twisted filaments comprising MgB2 in a titanium matrix, wherein the assembly forming the cooling chamber comprises a first cryogenic chamber in which the superconducting induction coil is placed and a second cryogenic chamber in which the rotary portion of the inductor and the induced element are placed.

### Claim 2 (depends on 1)

The machine according to claim 1, further comprising a stator yoke closing the inductor and including at least one iron crown.

### Claim 3 (depends on 1)

An aircraft comprising at least one turbomachine comprising the electric machine according to claim 1.

### Claim 4

A superconducting flux barrier electric machine, comprising:
an induced element, and
an inductor, wherein the inductor comprises a superconducting induction coil and a rotary portion forming a rotor, and the induced element comprises an arrangement of electromagnetic coils coaxial with the superconducting induction coil,
wherein the rotor comprises superconducting pellets mounted radially inside the superconducting coil on an axis of rotation of the machine, the superconducting pellets being distributed in the orthoradial direction of the superconducting machine and configured to form flux barriers, wherein the electromagnetic coils are made of a superconducting material and wherein the induced element and the inductor are arranged in an assembly forming a cooling chamber provided with at least one vacuum chamber configured to cool down the superconducting induction coil, electromagnetic coils, and superconducting pellets, wherein the electromagnetic coils comprise twisted filaments comprising MgB2 in a titanium matrix, wherein the assembly forming the cooling chamber comprises a first cryogenic chamber in which the superconducting coil is placed and cryogenic chambers in which the rotary portion of the inductor and the induced element are respectively placed.