| 摘要 |
PURPOSE:To hold a rotator with a fitted turntable at a center position by strong restoring force and damping characteristics while eliminating a rolling sound due to a bearing, by floating and supporting the rotator by the exciting magnetic force of an electromagnet. CONSTITUTION:On the top surface of box body 1, opening 1a is formed, flat armature iron core 2 is provided as a stator along its circumference part, and three- phase armature winding 3 is provided. Outside of armature iron core 2, '' ''-shaped direct-current electromagnet 4 divided into at least three is arranged concentrically at a uniform interval and several grooves 4a are formed on a surface opposing to rotator 5. To discoid rotator 5, rotator 6 of a permanent magnet is provided to a surface opposing to armature iron core 2, thereby constituting a flat synchronizing motor. Further the surface opposing to electromagnet 4 is made into thick part 7 and grooves 7 are formed on the surface opposing to magnets 4 as many as them before secondary conductor 7b is provided to the surface thick part 7. Then, dis- placement meter 10 is provided to each magnet 4 opposing to rotator 5 and the absorbing force of each electromagnet so that the gap length to rotator 5 will be a set value. |
