| 摘要 |
PURPOSE:To obtain an active damper of high controllability and high speed responsiveness by using a cylindrical magnet on a moving side, and installing a yoke of soft magnetic substance having saturated magnetic flux density over coercive force of the magnet and a coil for exciting the yoke on a stationary side. CONSTITUTION:A cylindrical magnet 1 is used on the moving side of a damper and a yoke 3 of soft magnetic substance having saturated magnetic flux density over coercive force of the magnet 1 and a coil 4 for exciting the yoke 3 are provided on the stationary the side. Owing to this constitution, when the coil is electrified in this damper the magnet 1 is magnetized in accordance with electric current of the coil 4, and when a damper shaft 6 is moved by external force, resistance is generated by hysteresis of the magnet 1. This damping force is not dependent on moving speed in the same way as the case of friction load, therefore controllability is good. Moreover, the damping force is possible to be controled by electric current value for electrifying the coil 4, and because responding speed is decided by only the time constant of the coil 4, speed responsiveness is exceedingly improved in comparison with a traditional active damper. |
