Patent ID: 7642680

Claim:
A rotary electrical machine, comprising: a stator core; a rotor core arranged at an inner periphery of said stator core; a bracket connected with an end of said stator core; a first bearing arranged by means of said bracket; a frame and a housing connected with an outer end of said stator core; a second bearing arranged by means of said housing; a ventilation fan provided between said rotor core and said second bearing, with vanes provided on an outer periphery in an axial direction; a rotor shaft that is freely rotatably supported by said first bearing and said second bearing; an inlet provided on an inner periphery of said vanes of said ventilation fan in said frame and housing; an outlet provided on an outer periphery of said vanes of said ventilation fan, said outlet being located on a side opposite said inlet in said frame; and a partition provided on an outer periphery of said inlet and an inner periphery of said vanes of said ventilation fan, said partition being provided in an axial direction, wherein external air flowing in from said inlet flows along a side face of said frame and said housing in said axial direction and a central side of said bearing, and flows out from said outlet.