# US 10,770,943 B2 · Rotary electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,943 B2 - Document ID: US10770943B2 - Status: Granted - Kind: B2 - Application number: 14/616,829 - Filed: 2015-02-09 - Published: 2016-03-03 - Granted: 2020-09-08 - Earliest claimed: 2014-08-28 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Masashi Nakamura; Shogo Okamoto; Masaya Inoue; Atsushi Sakaue; Tatsuro Hino - Web page: https://patentgrep.com/patent/US10770943B2 ## CPC - H02K 3/38: around winding heads, equalising connectors, or connections thereto - H02K 3/24: with channels or ducts for cooling medium between the conductors - H02K 9/19: for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil - H01F 41/122: {Insulating between turns or between winding layers} - H02K 3/32: Windings characterised by the shape, form or construction of the insulation - 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 A rotary electric machine is installed such that a central axis of a rotating shaft is horizontal, and coolant suction apertures are formed at positions on a cylindrical portion of a frame that are vertically above first and second coil ends, and strip-shaped insulating papers are inserted such that a thickness direction is in a radial direction between radially adjacent conductor portions of portions of the conductor wire that constitute the first and second coil ends, and are disposed so as to extend circumferentially across positions that are vertically below the coolant suction apertures inside the first and second coil ends. ## Claims ### Claim 1 A rotary electric machine comprising: a housing; a rotor that is fixed to a rotating shaft that is rotatably supported by said housing so as to be disposed inside said housing; an armature including: an annular armature core in which slots are arranged circumferentially so as to open radially inward; and an armature winding that is constituted by a plurality of coils that are each produced by bending and shaping a conductor wire, and that are mounted to said armature core, said armature being disposed so as to be coaxial to said rotor so as to surround said rotor, and being held by said housing, said rotary electric machine being installed such that a central axis of said rotating shaft is horizontal, and a liquid coolant being blown onto a coil end of said armature winding from a coolant suction aperture that is formed on said housing to cool said armature winding, wherein: said coolant suction aperture is formed at a position on said housing that is vertically above said coil end; and a strip-shaped insulating paper is inserted such that a thickness direction is in a radial direction between radially adjacent conductor portions of a portion of said conductor wire that constitutes said coil end, and is disposed so as to extend circumferentially across a position that is vertically below said coolant suction aperture inside said coil end, wherein: m layers of said insulating paper that is inserted between said radially adjacent conductor portions are disposed in a radial direction, where m is an integer that is greater than or equal to 1; and a penetrating aperture that allows said liquid coolant to pass through is formed on each of said m layers of insulating paper that are disposed in said radial direction, wherein said penetrating aperture is formed on said insulating paper so as to overlap when viewed from a radially outer side of said coil end with a gap that is formed between said conductor portions that are on opposite sides of said insulating paper. ### Claim 2 (depends on 1) The rotary electric machine according to claim 1, wherein a central bore is formed at a central axial position of said rotating shaft, a nozzle is formed so as to branch off radially from said central bore at a position of said coil end on said rotating shaft, and said liquid coolant is supplied to said central bore during operation, and is blown onto said coil end from said nozzle. ### Claim 3 A rotary electric machine comprising: a housing; a rotor that is fixed to a rotating shaft that is rotatably supported by said housing so as to be disposed inside said housing; an armature including: an annular armature core in which slots are arranged circumferentially so as to open radially inward; and an armature winding that is constituted by a plurality of coils that are each produced by bending and shaping a conductor wire, and that are mounted to said armature core, said armature being disposed so as to be coaxial to said rotor so as to surround said rotor, and being held by said housing, said rotary electric machine being installed such that a central axis of said rotating shaft is horizontal, and a liquid coolant being blown onto a coil end of said armature winding from a coolant suction aperture that is formed on said housing to cool said armature winding, wherein: said coolant suction aperture is formed at a position on said housing that is vertically above said coil end; and a strip-shaped insulating paper is inserted such that a thickness direction is in a radial direction between radially adjacent conductor portions of a portion of said conductor wire that constitutes said coil end, and is disposed so as to extend circumferentially across a position that is vertically below said coolant suction aperture inside said coil end, wherein: m layers of said insulating paper that is inserted between said radially adjacent conductor portions are disposed in a radial direction, where m is an integer that is greater than or equal to 2; and a penetrating aperture that allows said liquid coolant to pass through is formed on each of said insulating papers except for said insulating paper that is positioned radially innermost. ### Claim 4 (depends on 3) The rotary electric machine according to claim 3, wherein said penetrating aperture is formed on said insulating paper so as to overlap when viewed from a radially outer side of said coil end with a gap that is formed between said conductor portions that are on opposite sides of said insulating paper.