# US 2017/0288480 A1 · Rotating electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288480 A1 - Document ID: US20170288480A1 - Status: Published application - Kind: A1 - Application number: 15/507,992 - Filed: 2015-01-15 - Published: 2017-10-05 - Earliest claimed: 2015-01-15 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Tadashi MURAKAMI; Naomi KIKUCHI; Atsushi SAKAUE; Tatsuro HINO; Akihiro YAMAMURA; Shogo OKAMOTO; Shinji NISHIMURA; Masaya INOUE - Web page: https://patentgrep.com/patent/US20170288480A1 ## CPC - H02K 1/185: {to outer stators} - H02K 1/148: {Sectional cores (H02K1/141 takes precedence)} - H02K 1/276: Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] - H02K 5/1732: {radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence)} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract While lamination of steel sheets to be included in a stator core having a plurality of tooth portions is performed through swaging at yoke portions and through swaging at tooth portions, the stator core is formed in such a way as to include the tooth portion having a portion that is pressed into another steel sheet through swaging and the tooth portion having no portion that is pressed into another steel sheet through swaging. ## Claims ### Claim 1 A rotating electric machine having a rotor pivotably provided and a stator disposed at the outer circumference side of the rotor, wherein the stator has an annular stator core and a coil portion wound around the stator core, wherein the stator core includes two or more divided cores arranged in an annular manner, wherein the divided core has a laminated structure in which steel sheets that each have a yoke portion formed in the circumferential direction and two tooth portions formed in such a way as to protrude from the yoke portion toward the radial-direction inner side are united with one another by respective first swaging portions provided in the yoke portions and respective second swaging portions provided in the tooth portions, and wherein the divided core has at least one portion where steel sheets that are adjacent to each other in the thickness direction are not united by the second swaging portion at one of or both of the two tooth portions. ### Claim 2 (depends on 1) The electric rotating machine according to claim 1, wherein in the divided core, steel sheets that are adjacent to each other in the thickness direction and are not united with each other by the second swaging portion at one of the two tooth portions are united by the second swaging portion at the other one of the two tooth portions. ### Claim 3 (depends on 2) The electric rotating machine according to claim 2, wherein the divided core is formed in such a way as to include a part thereof where a given number of portions, in each of which steel sheets that are adjacent to each other in the thickness direction are united with each other by the second swaging portion only at one of the two tooth portions and a given number of portions, in each of which steel sheets that are adjacent to each other in the thickness direction are united with each other by the second swaging portion only at the other one of the two tooth portions are alternately stacked in the thickness direction. ### Claim 4 (depends on 1) The electric rotating machine according to claim 1, wherein in the divided core, all steel sheets that are adjacent to one another in the thickness direction are united with one another by the respective first swaging portions. ### Claim 5 (depends on 2) The electric rotating machine according to claim 2, wherein the divided core is laminated in such a way as to have at least one said second swaging portions in each of the two tooth portions and to have at least one said first swaging portions at two positions that circumferentially flank an intermediate line between the two tooth portions, and wherein the divided core includes at least one portion where steel sheets that are adjacent to each other in the thickness direction are united with each other by the second and first swaging portions only at one of the two tooth portions and the yoke portion circumferentially opposite to the one of the two tooth portions with respect to the intermediate line. ### Claim 6 (depends on 5) The electric rotating machine according to claim 5, wherein the divided core is formed in such a way as to include a part thereof where a given number of portions, in each of which steel sheets that are adjacent to each other in the thickness direction are united with each other by the second and first swaging portions only at one of the two tooth portions and the yoke portion circumferentially opposite to the one of the two tooth portions with respect to the intermediate line and a given number of portions, in each of which steel sheets that are adjacent to each other in the thickness direction are united with each other by the second and first swaging portions only at the other one of the two tooth portions and the yoke portion circumferentially opposite to the other one of the two tooth portions with respect to the intermediate line are alternately stacked in the thickness direction. ### Claim 7 (depends on 1) The electric rotating machine according to claim 1, wherein in each of a predetermined number of steel sheets at one end of the divided core in the lamination-thickness direction and a predetermined number of steel sheets at the other end of the divided core, steel sheets that are adjacent to each other in the thickness direction are united with each other by the respective second swaging portions at both of the two tooth portions and by the first swaging portion at the yoke portion. ### Claim 8 (depends on 1) The electric rotating machine according to claim 1, wherein the first swaging portion is provided closer to the outer circumference of the steel sheet than the center position of the radial-direction width of the yoke portion. ### Claim 9 (depends on 1) The electric rotating machine according to claim 1, wherein the second swaging portion is provided closer to the inner circumference of the steel sheet than the center position of the radial-direction length of the tooth portion.