Abstract
This article considers the flow of mechanical power in the electric drive under the condition of vibration disturbances. The paper discusses two electric models mounted on a rigid base and shock absorbers. The transfer of mechanical energy in such systems causes oscillation as mechanical and electromagnetic nature. Viscoelastic elements create countervailing force preventing deviation from the equilibrium position of the system and substantially attenuating high frequency vibrations. Studies were conducted using the methods of simulation dynamic modeling and frequency analysis. The values of linear displacements of the center of mass of the unbalanced rotor and the radial components of the forces acting on the engine bearings are obtained as a result of modeling. The action of the inertial force on the motor mounted on the rigid base is approximately 1.5 times greater than the effect of this force on the system equipped with magnetorheological shock absorbers. The estimation of mechanical power fluxes is made according to the spectrum of inertial force acting on the bearings. Spectrograms show that many pronounced harmonics are suppressed by the action of dissipative and elastic forces created by magnetorheological shock absorbers. The comparison of the spectrograms of the two dynamic systems showed that the system with active shock absorbers absorbs up to 50% of pulsating mechanical energy of vibration perturbations of the electric drive.
Keywords
Electric drive, vibrations, damping, mechanical power flows, mathematical modeling, dynamic model of electric drive, vibration supports, viscoelastic base.
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