Patent ID: 6359350
Filing Date: 2002-03-19
Classification: H02K

Abstract:
An electric rotary machine comprising a rotor formed therein with cooling passages and a stator fitted on a rotary shaft and formed therein with a plurality of branch passages, at least one gas cooler for cooling gas circulated by at least one fan through the cooling passages in the rotor and the plurality of branch cooling passages in the stator, the gas cooler being partitioned therein into at least two independent cooling passage parts through which gas flows therethrough in opposite directions, a stator connection passage through which gas flowing through one of the at least two independent cooling passage parts of the gas cooler in a first direction is led into one of the plurality of branch passages in the stator, and a passage means for guiding gas warmed up through the branch cooling passages in the stator and the cooling passages in the rotor, into another one of the at least two independent cooling passage parts in the gas cooler without being mixed with the gas passing through the stator connection passage so that the gas flows through the another one of the at least two independent cooling passage parts in a second direction opposite to the first direction.