| 摘要 |
PROBLEM TO BE SOLVED: To provide a damper device capable of converting oscillational energy into electromagnetic energy effectively for damping oscillation, and changing damping characteristics. SOLUTION: A magnetic circuit which divides magnetic flux from at least one pole, or the magnet pole 2 of a magnet 1 into two or more yokes 3a, 3b is formed, and a coil 4 interlinkaged with the magnetic flux of the magnetic circuit is wound, the pole 2 or either yoke 3a or 3b is connected directly to the magnetic circuit on the side where oscillation is generated, air gap length is changed differentially by the oscillation based on the direction of a branch so that the branch of the magnetic flux may be changed operationally, thereby connecting electrical resistance to one or more coil 4 wound around the yokes 3a, 3b and the magnet pole 2, or using only the internal resistance of the coil 4 as the resistance value of the circuit by shorting both ends of the coil 4. Induced current by change in the magnetic flux flows through an electric circuit, and a time constant which is a ratio of the inductance L of the coil 4 to a resistor R of the whole circuit is adjusted, thus it is possible to adjust damping effect.
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