US 12,445,004 B2
Stator and rotary electric machine
Kentaro Fukui, Wako (JP); Shinji Kato, Wako (JP); Takashi Wakui, Wako (JP); and Noriyuki Yagi, Wako (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Sep. 21, 2023, as Appl. No. 18/370,904.
Claims priority of application No. 2022-152411 (JP), filed on Sep. 26, 2022.
Prior Publication US 2024/0106289 A1, Mar. 28, 2024
Int. Cl. H02K 3/24 (2006.01); H02K 3/34 (2006.01); H02K 9/19 (2006.01)
CPC H02K 3/24 (2013.01) [H02K 3/345 (2013.01); H02K 9/19 (2013.01); H02K 2213/03 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A stator comprising:
a cylindrical stator core having a plurality of slots formed at intervals in a circumferential direction; and
a plurality of coils having segment conductors inserted through the plurality of slots and extending in an axial direction,
wherein, in the slots, a coolant flow channel bound by a corner portion through which a coolant flows is formed between an outer circumferential surface of the segment conductor and an inner circumferential surface of the slot,
the outer circumferential surface of the segment conductor includes a first flat surface facing a radial direction, a second flat surface facing a circumferential direction, and the corner portion curved surface connecting the first flat surface and the second flat surface,
the corner portion curved surface includes a first curved surface continuous with the first flat surface and a second curved surface continuous with the second flat surface, and
when seen in a cross-sectional view perpendicular to the axial direction, a radius of curvature of the first curved surface is greater than a radius of curvature of the second curved surface.