# US 11,909,259 B2 · Stator, motor, fan, air conditioner, and method for manufacturing stator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,259 B2 - Document ID: US11909259B2 - Status: Granted - Kind: B2 - Application number: 17/256,574 - Filed: 2018-08-28 - Published: 2021-04-29 - Granted: 2024-02-20 - Earliest claimed: 2018-08-28 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Takaya Shimokawa; Hiroki Aso; Ryogo Takahashi - Web page: https://patentgrep.com/patent/US11909259B2 ## CPC - H02K 1/146: {consisting of a generally annular yoke with salient poles} - F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence) - F24F 1/0018: characterised by fans (with secondary air induced by injector action of the primary air F24F1/01) - H02K 1/148: {Sectional cores (H02K1/141 takes precedence)} - H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) - H02K 15/022: with salient poles - H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines - H02K 21/16: having annular armature cores with salient poles (with homopolar co-operation H02K21/20) - F04D 17/04: of transverse-flow type - F04D 25/0646: {Details of the stator} - F04D 25/08: the working fluid being air, e.g. for ventilation - H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - 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) ## Abstract A stator includes a first core that includes a first tooth extending in a first radial direction and a first core back extending in a circumferential direction and a second core that includes a second tooth extending in a second radial direction and a second core back extending in the circumferential direction. The first core back includes a depression formed with at least a first face and a second face in an outer peripheral surface of the first core back and a connection part facing the second core back. The stator satisfies θ1<θ2, where θ1 represents an angle between the first face and the first radial direction and θ2 represents an angle between the second face and the first radial direction. ## Claims ### Claim 1 A stator comprising: a first core that includes a first tooth extending in a first radial direction and a first core back extending in a circumferential direction; and a second core that includes a second tooth extending in a second radial direction and a second core back extending in the circumferential direction and connects with the first core, wherein the first core back includes: a depression formed with at least a first face and a second face in an outer peripheral surface of the first core back; and a connection part facing the second core back, the stator satisfies θ1<θ2 and α1≤θ1<90 degrees where θ1 represents an angle between the first face and the first radial direction in a plane perpendicular to an axial direction, θ2 represents an angle between the second face and the first radial direction in the plane, and α1 (degrees) represents an angle between the connection part and the first radial direction in the plane, and the second face of the depression is formed at a position where a straight line passes through a center of the first tooth in the first radial direction in the plane. ### Claim 2 (depends on 1) The stator according to claim 1, wherein the stator comprises a plurality of teeth including the first tooth and the second tooth, and the angle α1 is 360/2n degrees, where n represents the number of the plurality of teeth. ### Claim 3 (depends on 1) The stator according to claim 1, wherein the second core back includes a depression formed with at least two faces. ### Claim 4 (depends on 1) The stator according to claim 1, wherein an angle between the first face and the second face is 90 degrees in the plane. ### Claim 5 (depends on 1) The stator according to claim 1, wherein in the plane, an intersection point of an extension line of the first face and an extension line of the second face is deviated from a center of the first tooth in a direction perpendicular to the first radial direction. ### Claim 6 (depends on 1) The stator according to claim 1, further comprising a third core that includes a third tooth extending in a third radial direction and a third core back extending in the circumferential direction and connects with at least one of the first core or the second core, wherein the third core includes a depression formed with at least three faces in an outer peripheral surface of the third core back. ### Claim 7 (depends on 1) A motor comprising: the stator according to claim 1; and a rotor rotatably disposed inside the stator. ### Claim 8 (depends on 7) The motor according to claim 7, wherein the first core and the second core are covered by a resin formed of a nonmagnetic material. ### Claim 9 (depends on 8) The motor according to claim 8, wherein the depression formed in the outer peripheral surface of the first core back is filled in with the resin. ### Claim 10 (depends on 7) A fan comprising: a blade; and the motor according to claim 7 that drives the blade. ### Claim 11 (depends on 7) An air conditioner comprising: an indoor unit; and an outdoor unit connected to the indoor unit, wherein at least one of the indoor unit or the outdoor unit includes the motor according to claim 7.