| 摘要 |
A vibration unit with electromagnetic excitation of oscillations contains a pair of electromagnets with windings located from the opposite sides relative to armature, a source of driving signal, a setting device of amplitude and frequency of excitation of windings, two switches. The device additionally contains 2n switches and n electromagnets similar to the first pair, with appropriate armatures and windings connected through the appropriate switches to the source of current, in this case the controlling input of each switch is connected through the system of selection, phase shift between the starting of the corresponding electromagnets to the source of demand signal, the control input of the source of current and source of driving signal is connected to the output of the setting device of amplitude and frequency of excitation of windings, in this case each of the pairs of electromagnets with armature is equipped with elastic limiting system of the motion of armatures with fixed upper limitation and rigidly connected to the armatures lower limiting strikers installed with possibility of impact on the anvil of the concentrator of impacts, which through the second elastic system is connected to the basis. |
