| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor equipped with a mass damper, capable of reducing vibrations that contain higher-order components generated according to the internal configuration. <P>SOLUTION: A brushless motor 6 includes a stator 61, having 12 teeth 611a to 611l and a rotor 65, including a permanent magnet 651 having eight magnetic poles. The rotor yoke 652 included in the rotor 65 is provided in the inside center thereof with rubber-like elastic bodies 654a to 654h, that are connected to a motor shaft 66 and function as dampers; and metal weights 653a to 653h that can vibrate on the shaft in the radial direction and function as mass. The eight mass dampers (dynamic vibration absorbers), formed by appropriately setting the spring constants thereof, are disposed around the shaft at equal intervals. Vibrations containing an eighth-order component due to magnetic attractive force, or the like, produced between the stator 61 and the rotor 65 can be reduced by the mass dampers. <P>COPYRIGHT: (C)2009,JPO&INPIT |
