US 12,463,474 B2
Stator for rotating electrical machine and method for manufacturing stator for rotating electrical machine
Yoichi Miyoshi, Kariya (JP); and Masahiro Nagaya, Kariya (JP)
Assigned to AISIN CORPORATION, Kariya (JP)
Appl. No. 18/280,810
Filed by AISIN CORPORATION, Aichi (JP)
PCT Filed May 10, 2022, PCT No. PCT/JP2022/019833
§ 371(c)(1), (2) Date Sep. 7, 2023,
PCT Pub. No. WO2023/276452, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 2021-108370 (JP), filed on Jun. 30, 2021.
Prior Publication US 2024/0297539 A1, Sep. 5, 2024
Int. Cl. H02K 1/16 (2006.01); H02K 3/28 (2006.01); H02K 15/026 (2025.01); H02K 15/085 (2006.01)
CPC H02K 1/165 (2013.01) [H02K 3/28 (2013.01); H02K 15/026 (2013.01); H02K 15/085 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A stator for a rotating electrical machine, the stator comprising:
a stator core having a plurality of slots; and
a stator coil formed by winding a plurality of double-wound coils of each phase, each including two concentric coil portions having a closed coil shape as viewed in a radial direction, around the stator core along an entire circumference of the stator core, wherein:
each of the two coil portions in one double-wound coil forms the closed coil shape by: slot insertion portions on both sides in a circumferential direction that are inserted into different slots; and crossovers on both sides in an axial direction that extend in the circumferential direction between end portions on both sides in the axial direction of the slot insertion portions on both sides in the circumferential direction;
the plurality of double-wound coils is inserted in each slot in such a manner that the slot insertion portion of one of the double-wound coils is radially adjacent to the slot insertion portion of another one of the double-wound coils;
the double-wound coil of each phase includes a first double-wound coil farthest from a neutral point and a second double-wound coil other than the first double-wound coil; and
of the first double-wound coil of a first phase, the first double-wound coil of a second phase, and the first double-wound coil of a third phase, only a combination of the first double-wound coil of the first phase and the first double-wound coil of the second phase overlaps in a specific circumferential section corresponding to at least one slot, and the slot insertion portions of the first double-wound coils of different phases are inserted in different slots.