谐波电流激励下电驱动系统振动特性及主动控制策略研究OA北大核心CSTPCD

To study the electromechanical coupling vibration characteristics of the electric drive system under harmonic current excitation and the active vibration damping control strategy,this paper builds an electromechanical coupling dynamics model of the electric drive system,taking into account the structural characteristics of the electric motor,magnetic saturation characteristics,time-varying meshing stiffness of gears,meshing error and other nonlinear factors.The electromechanical coupling vibration characteristics of the electric drive system under the excitation of different harmonic currents are investigated.Then,an active vibration reduction control strategy for the electric drive system based on harmonic current injection is proposed,and the optimal harmonic current parameters are identified offline.Our simulation results show the coupling effect of electromagnetic excitation and nonlinear mechanical excitation lead to electromagnetic torque fluctuation and phase current waveform distortion,and the harmonic current excitation aggravates the electromagnetic torque of the motor and the vibration amplitude of the gearing system while the harmonic current injection-based active vibration damping control strategy significantly reduces the fluctuation of the torque of the motor (6fe) and the amplitude of the harmonic component (12fe) of the gearing sub-dynamic mesh force.