| 摘要 |
PURPOSE:To increase the effect in cooling by cooling a cored type stator so as the coolant does not make contact with rotor by using a magnet coupling and being stirred in the manner that the coolant works in conjunction with the revolution of the rotor. CONSTITUTION:A rotor yoke 11 is fixed to a rotary shaft 10 of a brushless motor body 2, and it is so designed as to make a relative revolution with respect to a stator armature 14. A fin rotating magnet 29 is mounted on the top of the rotary shaft 10, and is coupled with a fin rotating field magnet 30 magnetically. Accordingly, a coolant stirring fin 26 rotates in synchronization with the rotation of a rotor yoke 11. According to the constitution, the coolant 28 in a coolant enclosed container 24 is stirred, and the stator armature 14 is cooled. The coolant 28 does not make contact with the rotor so that there is no frictional resistance and no dust to get into therein. |
