# US 2019/0356180 A1 ยท Rotating electrical machine > Agents: this data is available as JSON from the patentgrep API and MCP server โ€” see https://patentgrep.com/llms.txt - Number: US 2019/0356180 A1 - Document ID: US20190356180A1 - Status: Published application - Kind: A1 - Application number: 16/260,436 - Filed: 2019-01-29 - Published: 2019-11-21 - Earliest claimed: 2018-05-15 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Masashi Nakamura; Akihito Mori; Tatsuro Hino; Kohei Yasuda - Web page: https://patentgrep.com/patent/US20190356180A1 ## CPC - H02K 1/165: {Shape, form or location of the slots} - H02K 3/14: with transposed conductors, e.g. twisted conductors - H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) - H02K 15/021: Magnetic cores - H02K 3/345: {between conductor and core, e.g. slot insulation} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A rotating electrical machine can increase the strength of divided cores and, in addition, can achieve both a reduction in iron loss and a high rigidity of the divided cores. The stator of the rotating electrical machine includes a stator core having radially divided cores arranged in a ring, each divided core being a laminate of magnetic steel sheets. Each divided core has a swaged portion in which the laminated magnetic steel sheets are bonded by swaging. The swaged portion is disposed in a core back portion, which is in contact with core back portions of divided cores located on both sides of the divided core at a position whose distance from an outer periphery of the core back portion is within โ…“ of a radial length of the core back portion. ## Claims ### Claim 1 A rotating electrical machine comprising: a housing; a stator fixed in the housing; and a rotor disposed inside and opposite the stator, wherein the stator includes a stator core having radially divided cores arranged in a ring, each divided core being a laminate of magnetic steel sheets, and stator windings placed in slots each formed by two adjacent ones of the divided cores of the stator core, and wherein each divided core has at least one swaged portion in which the laminated magnetic steel sheets are bonded by swaging, the at least one swaged portion being disposed in a core back portion, which is in contact with core back portions of divided cores located on both sides of the divided core, at a position whose distance from an outer periphery of the core back portion is within โ…“ of a radial length of the core back portion. ### Claim 2 (depends on 1) The rotating electrical machine according to claim 1, wherein the at least one swaged portion includes two swaged portions, wherein each divided core has a fastened portion, which is formed by welding of the laminated magnetic steel sheets, in a circumferentially middle, radially outermost portion of the core back portion, and wherein the fastened portion and the two swaged portions are disposed in a triangle. ### Claim 3 (depends on 2) The rotating electrical machine according to claim 2, wherein a recess is provided in the circumferentially middle, radially outermost portion of the core back portion, and the fastened portion is formed in the recess. ### Claim 4 (depends on 2) The rotating electrical machine according to claim 2, wherein the stator core has fastened portions which are formed by welding of adjacent divided cores. ### Claim 5 (depends on 3) The rotating electrical machine according to claim 3, wherein the stator core has fastened portions which are formed by welding of adjacent divided cores. ### Claim 6 (depends on 4) The rotating electrical machine according to claim 4, wherein each fastened portion formed by welding of the two adjacent divided cores and the adjacent swaged portions of the two adjacent divided cores are disposed in a triangle. ### Claim 7 (depends on 5) The rotating electrical machine according to claim 5, wherein each fastened portion formed by welding of the two adjacent divided cores and the adjacent swaged portions of the two adjacent divided cores are disposed in a triangle. ### Claim 8 (depends on 2) The rotating electrical machine according to claim 2, wherein the welding-fastened portions are disposed only at both axial ends of the stator core. ### Claim 9 (depends on 3) The rotating electrical machine according to claim 3, wherein the welding-fastened portions are disposed only at both axial ends of the stator core. ### Claim 10 (depends on 4) The rotating electrical machine according to claim 4, wherein the welding-fastened portions are disposed only at both axial ends of the stator core. ### Claim 11 (depends on 5) The rotating electrical machine according to claim 5, wherein the welding-fastened portions are disposed only at both axial ends of the stator core. ### Claim 12 (depends on 6) The rotating electrical machine according to claim 6, wherein the welding-fastened portions are disposed only at both axial ends of the stator core. ### Claim 13 (depends on 7) The rotating electrical machine according to claim 7, wherein the welding-fastened portions are disposed only at both axial ends of the stator core. ### Claim 14 (depends on 2) The rotating electrical machine according to claim 2, wherein the welding-fastened portions are disposed in the stator core in a zigzag pattern in an axial direction. ### Claim 15 (depends on 1) The rotating electrical machine according to claim 1, wherein each swaged portion of the laminated magnetic steel sheets has two or more shear planes. ### Claim 16 (depends on 2) The rotating electrical machine according to claim 2, wherein each swaged portion of the laminated magnetic steel sheets has two or more shear planes. ### Claim 17 (depends on 1) The rotating electrical machine according to claim 1, wherein a filler is impregnated in the slots. ### Claim 18 (depends on 2) The rotating electrical machine according to claim 2, wherein a filler is impregnated in the slots. ### Claim 19 (depends on 14) The rotating electrical machine according to claim 14, wherein a filler is impregnated in the slots.