# US 2018/0323683 A1 · Electrical Machine Apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323683 A1 - Document ID: US20180323683A1 - Status: Published application - Kind: A1 - Application number: 15/966,037 - Filed: 2018-04-30 - Published: 2018-11-08 - Earliest claimed: 2017-05-02 - Assignees: ROLLS-ROYCE plc; Rolls-Royce Marine AS - Applicants: ROLLS-ROYCE plc; Rolls-Royce Marine AS - Inventors: Rory D. STIEGER; Astrid ROKKE - Web page: https://patentgrep.com/patent/US20180323683A1 ## CPC - H02K 3/22: consisting of hollow conductors - H01F 27/2876: {Cooling (cooling transformers and inductances in general H01F27/08)} - H02K 3/24: with channels or ducts for cooling medium between the conductors - H02K 5/203: {specially adapted for liquids, e.g. cooling jackets} - H02K 9/197: in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract Electrical machine apparatus comprising: an elongate electrical conductor comprising a first part defining a first end and a second end, the first part defining a first conduit and a second conduit; a first coolant manifold arranged to provide coolant to the first conduit; and a second coolant manifold arranged to provide coolant to the second conduit. ## Claims ### Claim 1 Electrical machine apparatus comprising: an elongate electrical conductor comprising a first part defining a first end and a second end, the first part defining a first conduit and a second conduit; a first coolant manifold arranged to provide coolant to the first conduit; and a second coolant manifold arranged to provide coolant to the second conduit. ### Claim 2 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the first coolant manifold is arranged to receive coolant from the first conduit, and the second coolant manifold is arranged to receive coolant from the second conduit. ### Claim 3 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the first conduit extends between the first end and the second end of the first part, the first coolant manifold being arranged to provide coolant to the first conduit at the first end of the first part, and the second coolant manifold being arranged to provide coolant to the second conduit at the second end of the first part. ### Claim 4 (depends on 3) Electrical machine apparatus as claimed in claim 3, wherein the first coolant manifold is arranged to receive coolant from the first conduit at the second end of the first part, and the second coolant manifold is arranged to receive coolant from the second conduit at the first end of the first part. ### Claim 5 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the first conduit has a first end and a second end, the first end of the first conduit being positioned a distance from the first end of the first part, the second end of the first conduit being positioned a distance from the second end of the first part, and wherein the second conduit has a first end and a second end, the first end of the second conduit being positioned a distance from the first end of the first part, and the second end of the second conduit being positioned a distance from the second end of the first part. ### Claim 6 (depends on 5) Electrical machine apparatus as claimed in claim 5, wherein the first part includes: a first aperture connected to the first end of the first conduit; a second aperture connected to the second end of the first conduit; a third aperture connected to the first end of the second conduit; and a fourth aperture connected to the second end of the second conduit. ### Claim 7 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the first part has a longitudinal axis, the first conduit and the second conduit having a non-overlapping arrangement along the longitudinal axis. ### Claim 8 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the first conduit comprises a groove in the first part of the elongate electrical conductor. ### Claim 9 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the second conduit comprises a groove in the first part of the elongate electrical conductor. ### Claim 10 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the first coolant manifold and the second coolant manifold are arranged to provide a counter flow of coolant through the first conduit and the second conduit during operation. ### Claim 11 (depends on 1) Electrical machine apparatus as claimed in claim 1, wherein the elongate electrical conductor has a coiled arrangement and comprises a first turn and a second turn. ### Claim 12 (depends on 11) Electrical machine apparatus as claimed in claim 11, wherein the elongate electrical conductor includes a second part defining a first end and a second end, the second part defining a third conduit and a fourth conduit. ### Claim 13 (depends on 12) Electrical machine apparatus as claimed in claim 12, wherein the first coolant manifold is arranged to provide coolant to the third conduit, and the second coolant manifold is arranged to provide coolant to the fourth conduit. ### Claim 14 (depends on 13) Electrical machine apparatus as claimed in claim 13, wherein the first turn and the second turn are adjacent to one another, and at least a portion of the first conduit and at least a portion of the third conduit are joined to form a single conduit. ### Claim 15 (depends on 12) Electrical machine apparatus as claimed in claim 12, wherein the first turn comprises the first part of the elongate electrical conductor and the second part of the elongate electrical conductor. ### Claim 16 (depends on 12) Electrical machine apparatus as claimed in claim 12, wherein the first turn comprises the first part of the elongate electrical conductor and the second turn comprises the second part of the elongate electrical conductor. ### Claim 17 (depends on 16) Electrical machine apparatus as claimed in claim 16, wherein the first turn and the second turn are adjacent to one another, and at least a portion of the second conduit and at least a portion of the fourth conduit are joined to form a single conduit. ### Claim 18 (depends on 16) Electrical machine apparatus as claimed in claim 16, wherein the first turn and the second turn are adjacent to one another, the first conduit and the third conduit are not joined and form separate conduits, the second conduit and the fourth conduit are not joined and form separate conduits. ### Claim 19 (depends on 1) Electrical machine apparatus as claimed in claim 1, further comprising a casing for housing the elongate electrical conductor, the casing having a first end and a second end, the casing defining a first port at the first end for supplying coolant to the first coolant manifold, and a second port at the second end for supplying coolant to the second coolant manifold. ### Claim 20 (depends on 1) An electrical machine comprising electrical machine apparatus as claimed in claim 1.