| 摘要 |
<p>An active dynamic vibration absorber is disclosed. An active dynamic vibration absorber according to an embodiment of the present invention includes a coil part which is wound with a coil in the inside in order to be vibrated by an electrical signal inside a housing, and a yoke part which is moved by electric force when a current flows in the coil part and has an upper yoke and a lower yoke as having a constant mass, and comprises a permanent magnet between them. A plate spring is installed on the upper part and the lower part of the yoke part respectively in order to convert motion of the yoke part into vibration. The active dynamic vibration absorber includes: an upper and a lower slide protrusion protruded from an outer circumference of the coil part on the upper part and the lower part of one side of the coil part; a plurality of upper and lower contact protrusions which are formed on the upper part and the lower part of one side of the lower yoke in correspondence to the upper and lower slide protrusion; and a plurality of driver devices which is electrically connected to the upper and lower contact protrusion, and generates a Lorentz force upward and downward between the coil part and the yoke part by applying a current to each of the upper and lower contact protrusion selectively according to a control signal.</p> |
