Enclosed air cooled electrical motor and its manufacturing method

Electrical motor of enclosed type comprising in particular a stator magnetic circuit and a cowling comprising a surround and two endplates, comprising a first ventilation circuit (20, 14, 15, 16) for the said stator magnetic circuit and a second ventilation circuit (25) inside the said cowling, the two ventilation circuits being dissociated, characterised in that the ventilation circuit of the said stator magnetic circuit comprises a plurality of channels (14) crossing right through the circuit and connected by metal tubes (15, 16) emerging outside the cowling.