METHOD OF AUTOMATIC SETTING OF RESONANT MODES OF OSCILLATIONS OF VIBRATION MACHINE DRIVEN BY INDUCTION MOTOR Russian patent published in 2016 - IPC B06B1/16 

FIELD: machine building.

SUBSTANCE: on the work element of the vibration machine the periodic exciting force acts, it arises during the balance weight rotation of the inertial vibration exciter driven by the induction motor; rotation speed of the balance weight is changed by frequency change of the power voltage depending on phases shift between oscillations of the working element and periodic exciting force; wherein the phases shift is determined as per signals from sensor of angular position of the balance weights and sensor of the working element oscillations.

EFFECT: excitation and keeping of the resonant oscillations of the working element of the vibration machine excited by the unbalance inertia vibration exciter driven by induction motor, upon change of parameters of the mechanical system of the vibration machine due to frequency control of the power voltage.

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