US 12,489,328 B2
Rotary electric machine and electric drive system
Ryouichi Takahata, Tokyo (JP); Masanori Sawahata, Tokyo (JP); Shinji Yamazaki, Hitachinaka (JP); and Kenichi Nakayama, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 18/558,086
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Feb. 9, 2022, PCT No. PCT/JP2022/005144
§ 371(c)(1), (2) Date Oct. 30, 2023,
PCT Pub. No. WO2022/254801, PCT Pub. Date Dec. 8, 2022.
Claims priority of application No. 2021-091040 (JP), filed on May 31, 2021.
Prior Publication US 2024/0223035 A1, Jul. 4, 2024
Int. Cl. H02K 3/12 (2006.01); H02K 3/14 (2006.01); H02K 3/50 (2006.01)
CPC H02K 3/12 (2013.01) [H02K 3/14 (2013.01); H02K 3/50 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A rotary electric machine, comprising:
a stator including
a stator core including a plurality of slots, and
a coil wound around the stator core, the coil including a plurality of segment conductors each having slot insertion portions disposed respectively inside the plurality of slots and a first coil end portion protruding from a first end surface in an axial direction with respect to the stator core; and
a rotor disposed, with a gap, being spaced from the stator,
wherein the first coil end portion includes linear portions connected respectively to the slot insertion portions and oblique side portions having a chevron shape with center portions being apexes,
wherein the plurality of segment conductors includes a first segment conductor inserted into two of the plurality of slots arranged at a first slot pitch and a second segment conductor inserted into two of the plurality of slots arranged at a second slot pitch smaller than the first slot pitch,
wherein the second segment conductor has a second linear portion that serves as the linear portion on one of the two slots and is longer than a first linear portion serving as the linear portion on the other one of the two slots, and
wherein the center portion of the first segment conductor has a protruding height from the first end surface of the stator core, the height being substantially equal to a protruding height from the first end surface of the stator core at the center portion of the second segment conductor.