Rotary electric machine

A rotary electric machine comprising:

• a housing;
• a rotor that is fixed to a rotating shaft that is rotatably supported by said housing so as to be disposed inside said housing;
• an armature including:
• an annular armature core in which slots are arranged circumferentially so as to open radially inward;
• and
• an armature winding that is constituted by a plurality of coils that are each produced by bending and shaping a conductor wire, and that are mounted to said armature core,
• said armature being disposed so as to be coaxial to said rotor so as to surround said rotor, and being held by said housing,
• said rotary electric machine being installed such that a central axis of said rotating shaft is horizontal, and a liquid coolant being blown onto a coil end of said armature winding from a coolant suction aperture that is formed on said housing to cool said armature winding,
• wherein:
• said coolant suction aperture is formed at a position on said housing that is vertically above said coil end;
• and
• a strip-shaped insulating paper is inserted such that a thickness direction is in a radial direction between radially adjacent conductor portions of a portion of said conductor wire that constitutes said coil end, and is disposed so as to extend circumferentially across a position that is vertically below said coolant suction aperture inside said coil end, wherein:
• m layers of said insulating paper that is inserted between said radially adjacent conductor portions are disposed in a radial direction, where m is an integer that is greater than or equal to 1;
• and
• a penetrating aperture that allows said liquid coolant to pass through is formed on each of said m layers of insulating paper that are disposed in said radial direction,
• wherein said penetrating aperture is formed on said insulating paper so as to overlap when viewed from a radially outer side of said coil end with a gap that is formed between said conductor portions that are on opposite sides of said insulating paper.