Rotary electric machine

A rotary electric machine comprising:

• a stator core including a plurality of teeth arranged in a row along a circumferential direction of the stator core;
• a stator coil composed of a winding wire wound around one or more of the plurality of teeth, wherein
• the stator coil includes coil end portions extending, outside the stator core in an axial direction thereof, along a substantially circumferential direction of the stator core, and straight portions extending along the axial direction, the straight portions being at least partially housed in a slot which is a void defined by two adjacent teeth of the plurality of teeth,
• a cooling groove is formed at least in the straight portion, the cooling groove being configured to function as a cooling channel through which a cooling fluid flows, and
• only one cooling groove is formed for each of the straight portion, the cooling groove being formed on one of circumferential end faces of the straight portion, and
• wherein the rotary electric machine is installed in a position in which an axial direction of the rotary electric machine intersects the direction of gravity and further includes a cooling pipe configured to discharge a cooling fluid toward the coil end portion from above the coil end portion in the direction of gravity, and the cooling groove is formed in only one of the circumferential end faces of the straight portion, the one being located on an upper side of the straight portion in the direction of gravity.

A rotary electric machine comprising:

• a stator core including a plurality of teeth arranged in a row along a circumferential direction of the stator core;
• and
• a stator coil composed of a winding wire wound around one or more of the plurality of teeth, wherein
• the stator coil comprises coil end portions extending, outside the stator core in an axial direction thereof, along a substantially circumferential direction of the stator core, and straight portions extending along the axial direction, the straight portions being at least partially housed in a slot which is a void defined by two adjacent teeth of the plurality of teeth,
• a cooling groove is formed at least in the straight portion, the cooling groove being configured to function as a cooling channel through which a cooling fluid flows, and
• only one cooling groove is formed for each of the straight portions, the cooling groove being formed in only one of circumferential end faces of the straight portion that is located upstream in a direction of forward rotation of the rotor.