| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamo-electric machine in which temperature rise of a permanent magnet, arranged on a stator and generating field magnetomotive force, is suppressed.SOLUTION: Since the heat of copper loss of a coil 11 is transmitted to a permanent magnet 12 via teeth 9b, 10b, and the heat of copper loss is also generated in the teeth 9b, 10b themselves, cavities 14, 15 are formed in the surface of the permanent magnet 12 facing the stator core 8, especially the surface facing the teeth 9b, 10b, thus relaxing heat reception of the permanent magnet 12. |
