Cooling arrangement of vehicle rotary electric machine

A vehicle rotary electric machine comprising:

• a rotor including a plurality of claw-shaped pole pieces forming a first cooling fan;
• a second cooling fan fixed to an end of said rotor;
• a stator disposed outside said rotor to be coupled therewith and including a stator core which has a plurality of slots and a stator winding, said stator winding including a plurality of in-slot portions disposed in said plurality of slots and a plurality of outside portions extending from said slots and forming a plurality of coil-ends at an axial end of said stator core and a plurality of coil-end-gaps between base portions of said outside portions;
• a frame for supporting said stator from outside, said frame having a plurality of air discharging openings at an outer periphery thereof;
• and
• a wall member disposed between said frame and said coil ends for guiding cooling air through said coil-end-gaps along outside surfaces of said plurality of coil ends.

A vehicle rotary electric machine comprising:

• a rotor including a plurality of claw-shaped pole pieces forming a first cooling fan at the base portion thereof;
• a second cooling fan fixed to an end of said rotor;
• a stator core disposed outside said rotor and having a plurality of slots;
• a stator winding including a plurality of in-slot portions disposed in said plurality of slots and a plurality of outside portions extending from said slots and forming a plurality of coil-ends at an axial end of said stator core and a plurality of coil-end-gaps disposed along said axial end between said outside portions extended from each pair of adjacent slots;
• a frame for supporting said stator from outside, said frame having a plurality of air discharging openings at an outer periphery thereof;
• and
• a wall member disposed between said frame and said coil ends for guiding cooling air through said coil-end-gaps along outside surfaces of said plurality of coil ends, said wall member having a flange portion for narrowing cooling air passage between said second cooling fan and said air discharging openings.

A vehicle rotary electric machine comprising:

• a rotor including a plurality of claw-shaped pole pieces forming a first cooling fan at the base portion thereof;
• a second cooling fan fixed to an end of said rotor;
• a stator core disposed outside said rotor and having a plurality of slots;
• a stator winding including a plurality of in-slot portions disposed in said plurality of slots and a plurality of outside portions extending from said slots and forming a plurality of coil-ends at an axial end of said stator core and a plurality of coil-end-gaps disposed along said axial end between said outside portions extended from each pair of adjacent slots;
• a frame for supporting said stator from outside, said frame having a plurality of air discharging openings at an outer periphery thereof;
• and
• an cylindrical insulation wall member disposed between said frame and said coil ends for guiding cooling air through said coil-end-gaps along outside surfaces of said plurality of coil ends, said wall member having a flange portion for lowering atmospheric pressure of a cooling air passage between said second cooling fan and said air discharging openings.