| 摘要 |
PURPOSE:To simplify mounting of a circular ring of a radiating part and a magnet by mounting a holding tube outside of an end bracket to provide a radiating fin outside of said holding tube and a heat pipe radiating part inside thereof. CONSTITUTION:A holding tube 16 is mounted outside of an end bracket 5b mounted on a frame 4. Outside of said holding tube 16 plural plate-shaped radiating fins 7 are radially in the axial direction mounted while inside the circular rings 13a and 13b and a magnet 12 are mounted. Between the circular rings 13a, 13b and a rotary axis 1a a magnetic fluid 14 is held. The heat generated in a rotor 2 and a stator 3 is mainly transmitted to a heat pipe 11 being further transmitted from the end thereof through a magnetic fluid 14 and the circular rings 13a and 13b to the radiating fins 7 to be then forcedly cooled by a cooling fan 9. |
