| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary electric machine that equalizes the distribution of temperature rise in the axial direction inside the machine. SOLUTION: In an air cooling heat exchanger type rotary electric machine that cools its inside by heat exchange with an external coolant passing through a plurality of cooling pipes, a plurality of the cooling pipes are divided into a plurality of groups. The flow direction of the external coolant blown into a group of the cooling pipes is made opposite to that of the external coolant blown into another group of the cooling pipes adjacent to the group of the cooling pipes. Specifically, open air is passed from one end to the other end in a group of the pipes, while it is passed from the other end to one end in another group of the pipes. Thus, the coolant inside the machine cooled by contacting the external periphery of the groups of the pipes is cooled roughly equally, so that the coolant temperature and the temperature rise of structural materials inside the machine are equalized. COPYRIGHT: (C)2007,JPO&INPIT
|
