Patent ID: 6087746
Filing Date: 2000-07-11
Classification: H02K

Abstract:
An alternator comprising:a hollow housing;a stator carried by the hollow housing; anda rotor in the hollow housing rotatably carried by the hollow housing and for rotation in the hollow housing and within the stator about an axis of rotation, the hollow housing defining a first side and a second side opposed to said first side, the hollow housing further defining cooling air inlet ports on its first side and cooling air outlet ports on its second side, wherein the air outlet ports have radially inner walls oriented obliquely to the axis, each said inner wall having an upstream end and a downstream end which is further from the axis in a radial direction than the upstream end, and wherein the air inlet ports are closer to said axis than the air outlet ports, whereby rotation of the rotor induces flow of air from said inlet ports to said outlet ports by centrifugal effect, and wherein the hollow housing includes an end wall in which said air outlet ports are formed, the rotor having a flank adjacent to said end wall, and the alternator further including a member defining a first oblique wall extending between said end wall of the hollow housing and said flank of the rotor, substantially in alignment with said inner walls of the air outlet ports.