| 摘要 |
PROBLEM TO BE SOLVED: To increase a heat transfer amount between teeth and an insulation member and to decrease heat resistance.SOLUTION: A coil 5 is wound around a plurality of teeth 3 which are arrayed in a circumferential direction at an inner peripheral side of a yoke 2 while interposing an elastic resin insulation member 4. Ruggedness 3a is formed on at least a circumferential surface A between the circumferential surface A and an axial surface B of each of the teeth 3, and ruggedness 4a adapted and fitted to the ruggedness 3a is formed on an inner surface of the insulation member 4. The teeth 3 are surrounded by the insulation member 4, and an outer surface 4b of the insulation member 4 positioned outside of the circumferential surfaces A and the axial surfaces B of the teeth 3 is formed in an arcuate shape with the high center in a winding direction of the coil 5. |
