| 摘要 |
PROBLEM TO BE SOLVED: To provide an AC servomotor in which heat generated by an armature is transmitted to a load side bracket to suppress the temperature rise of the armature. SOLUTION: This AC servomotor 1 has an armature core 5 on which armature coils 6 are wound and which is molded with resin as a whole except its surface facing a permanent magnet 3, and a bracket 8 on a load side and a bracket 9 on a side opposite to the load between which the armature core 5 is held. At least one or more heat absorbing side holes 12 which do not pierce in the axial direction are formed at an end surface on the load side of the armature core 5, and heat radiating side holes 13 as many as the heat absorbing side holes are formed at an end surface on the side opposite to the load at positions same as the positions of the heat absorbing side holes 12. Heat conducting rods 14 are mated with both the holes 12 and 13.
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