# US 11,309,772 B2 · Electric motor, air conditioner, vacuum cleaner, and method for producing electric motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,772 B2 - Document ID: US11309772B2 - Status: Granted - Kind: B2 - Application number: 16/608,883 - Filed: 2017-07-10 - Published: 2020-07-16 - Granted: 2022-04-19 - Earliest claimed: 2017-07-10 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Naohiro Oketani - Web page: https://patentgrep.com/patent/US11309772B2 ## CPC - F24F 1/0018: characterised by fans (with secondary air induced by injector action of the primary air F24F1/01) - A47L 5/22: with rotary fans - A47L 5/24: Hand-supported suction cleaners - A47L 9/22: Mountings for motor fan assemblies - A47L 9/28: Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means - A47L 9/2889: {Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user} - H02K 1/146: {consisting of a generally annular yoke with salient poles} - H02K 1/148: {Sectional cores (H02K1/141 takes precedence)} - H02K 3/18: Windings for salient poles - H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) - H02K 7/083: {radially supporting the rotary shaft at both ends of the rotor (H02K7/086, H02K7/09 take precedence)} - H02K 9/223: {Heat bridges} - H02K 15/022: with salient poles - H02K 21/16: having annular armature cores with salient poles (with homopolar co-operation H02K21/20) - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract An electric motor includes a stator, and a metal component that is in contact with the stator. The stator includes a first tooth, a second tooth, a first winding wound around the first tooth by concentrated winding, a second winding wound around the second tooth by concentrated winding, and a thermal conduction sheet held between the first winding and the second winding. The thermal conduction sheet is held between the metal component and the first winding in a deformed state. ## Claims ### Claim 1 An electric motor comprising: a stator; and a metal component that is in contact with the stator, the stator including a first tooth, a second tooth, a first winding wound around the first tooth by concentrated winding, a second winding wound around the second tooth by concentrated winding, a first insulator provided between the first tooth and the first winding, a second insulator provided between the second tooth and the second winding, a first thermal conduction sheet held between the first winding and the second winding and to conduct heat of the first winding to the metal component, the first thermal conduction sheet being different from the first insulator, and a second thermal conduction sheet held between the first winding and the second winding and to conduct heat of the second winding to the metal component, the second thermal conduction sheet being different from the second insulator, wherein the first thermal conduction sheet is wound around the first tooth and the first winding wound around the first tooth, the second thermal conduction sheet is wound around the second tooth and the second winding wound around the second tooth, the first thermal conduction sheet is held between the metal component and the first winding in a deformed state, and the second thermal conduction sheet is held between the metal component and the second winding in a deformed state. ### Claim 2 (depends on 1) The electric motor according to claim 1, wherein the stator includes a first split core and a second split core, the first split core includes the first tooth, and the first winding wound around the first tooth, and the second split core includes the second tooth, and the second winding wound around the second tooth. ### Claim 3 (depends on 2) The electric motor according to claim 2, wherein the stator includes a connecting portion, and the first split core is rotatably connected to the second split core via the connecting portion. ### Claim 4 (depends on 1) The electric motor according to claim 1, wherein the first thermal conduction sheet is held between the metal component and the first winding in an elastically deformed state. ### Claim 5 (depends on 1) The electric motor according to claim 1, wherein the first thermal conduction sheet is held between the metal component and the first winding in a plastically deformed state. ### Claim 6 (depends on 1) The electric motor according to claim 1, wherein the first thermal conduction sheet is held between the first winding and the second winding in a deformed state. ### Claim 7 (depends on 6) The electric motor according to claim 6, wherein the second thermal conduction sheet is held between the first winding and the second winding in an elastically deformed state. ### Claim 8 (depends on 6) The electric motor according to claim 6, wherein the second thermal conduction sheet is held between the first winding and the second winding in a plastically deformed state. ### Claim 9 (depends on 1) The electric motor according to claim 1, wherein at least a part of the metal component is exposed outside the electric motor. ### Claim 10 (depends on 1) The electric motor according to claim 1, wherein the metal component is a metal frame covering the stator. ### Claim 11 (depends on 1) An air conditioner comprising: an indoor unit; and an outdoor unit connected to the indoor unit, at least one of the indoor unit or the outdoor unit including the electric motor according to claim 1. ### Claim 12 (depends on 1) A vacuum cleaner comprising: a dust chamber; and an electric blower to generate suction force and send dust to the dust chamber, the electric blower including the electric motor according to claim 1. ### Claim 13 An electric motor comprising: a stator; and a metal component that is in contact with the stator, the stator including a first tooth, a second tooth, a first winding wound around the first tooth by concentrated winding, a second winding wound around the second tooth by concentrated winding, and a thermal conduction sheet held between the first winding and the second winding and to conduct heat of the first winding and the second winding to the metal component, wherein the thermal conduction sheet is held between the metal component and the first winding in a deformed state, and the thermal conduction sheet is held between the metal component and the second winding in a deformed state, wherein the metal component includes a first inner surface formed on one end side in an axial direction, and a second inner surface formed on the other end side in the axial direction, and the thermal conduction sheet is alternately in contact with the first inner surface and the second inner surface in a circumferential direction. ### Claim 14 A method for producing an electric motor including a first split core including a first winding, a second split core including a second winding, a metal component covering the first split core and the second split core, a first thermal conduction sheet to conduct heat, and a second thermal conduction sheet to conduct heat, the method comprising: producing the first split core and the second split core, the first split core including a first tooth and a first insulator disposed on the first tooth, the second split core including a second tooth and a second insulator disposed on the second tooth, the first insulator being different from the first thermal conduction sheet, the second insulator being different from the second thermal conduction sheet; winding the first thermal conduction sheet around the first tooth and the first winding wound around the first tooth and winding the second thermal conduction sheet around the second tooth and the second winding wound around the second tooth; folding the first split core and the second split core so that the first thermal conduction sheet and the second thermal conduction sheet are held between the first winding and the second winding; and disposing the first split core and the second split core in the metal component so that the first thermal conduction sheet and the second thermal conduction sheet come in contact with the metal component in a deformed state.