US 12,218,570 B2
Rotating electric machine
Zhi Jing, Hitachinaka (JP); Satoshi Yamamura, Hitachinaka (JP); Kenichi Nakayama, Hitachinaka (JP); Tomohiro Adachi, Hitachinaka (JP); Shinji Yamazaki, Hitachinaka (JP); Hiromitsu Okamoto, Hitachinaka (JP); and Yuuki Takahashi, Hitachinaka (JP)
Assigned to HITACHI ASTEMO, LTD., Hitachinaka (JP)
Appl. No. 18/009,134
Filed by HITACHI ASTEMO, LTD., Hitachinaka (JP)
PCT Filed Feb. 5, 2021, PCT No. PCT/JP2021/004263
§ 371(c)(1), (2) Date Dec. 8, 2022,
PCT Pub. No. WO2021/255983, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2020-102890 (JP), filed on Jun. 15, 2020.
Prior Publication US 2023/0216378 A1, Jul. 6, 2023
Int. Cl. H02K 5/20 (2006.01); H02K 1/16 (2006.01); H02K 9/19 (2006.01)
CPC H02K 9/19 (2013.01) [H02K 1/165 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A rotating electric machine comprising:
a rotor disposed such that a rotation center axis is horizontal;
a stator disposed with an air gap between the stator and the rotor in a radial direction; and
a case that supports the stator and forms a flow path through which a refrigerant flows,
wherein
the stator includes a stator core having a plurality of slots and a stator coil attached to the stator core,
the stator coil includes an intra-slot conductor disposed in the slot of the stator core and an extra-slot conductor disposed outside the slot,
the case forms a first outflow hole and a second outflow hole through which the refrigerant flows out toward the extra-slot conductor,
in a state where the case is installed,
the first outflow hole and the second outflow hole are disposed above the extra-slot conductor,
when a bending direction of the extra-slot conductor with respect to the intra-slot conductor disposed on an outermost diameter side in the slot in the stator coil disposed on an upper portion of the stator is defined as an upper coil bending direction, and a straight line perpendicular to the horizontal and passing through the rotation center axis is defined as a vertical line,
the first outflow hole is disposed on the upper coil bending direction side with respect to the vertical line, and
the second outflow hole is disposed on a side opposite to the upper coil bending direction with respect to the vertical line, and
the first outflow hole and the second outflow hole are formed such that a second arrangement angle that is an angle formed by a straight line connecting the second outflow hole and the rotation center axis and the vertical line is larger than a first arrangement angle that is an angle formed by a straight line connecting the first outflow hole and the rotation center axis and the vertical line.