To provide an apparatus and method for cooling a motor capable of achieving reductions in size and weight of a cooling system by self-circulating coolant.
This cooling motor has a reservoir tank 11, a coolant supply passage 12 for communicating a passage 3P in a rotor, a passage 4P in a stator, respective inlet ports 3Pin, 4Pin for the respective passages 3P, 4P, and the reservoir tank 11, a coolant circulating passage 13 for communicating respective outlet ports 3Pout, 4Pout of the respective passages 3P, 4P and the reservoir tank 11, check valves 14, 15 which stop counterflow toward the coolant supply passage 12 direction by being disposed adjacent to the respective inlet ports 3Pin, 4Pin of the passages 3P, 4P, and an exhaust heat mechanism 16 which is disposed at the coolant circulating passage 13. The reservoir tank 11 is disposed at more upper position than the respective passages 3P, 4P in a vertical direction. With this constitution, the coolant M in a liquid phase is vaporized by heat generation of the rotor 3 portion during passing through the respective passages 3P, 4P, therefore, it is possible to perform efficient cooling with the vaporized coolant M, and to self-circulate the coolant M, thus providing reduction in the size of the cooling device 10.
COPYRIGHT: (C)2006,JPO&NCIPI
Keiko Shishido
Shimonozono Hitoshi
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