高速列车牵引传动系统机电耦合振动及其影响因素分析

Study on Electromechanical Coupling Vibration of Traction Drive System of High-speed Train and Its Influence Factor

高速列车牵引传动系统是一个典型的机电耦合系统,由于驱动装置存在弹性,各部件间会因系统不稳定因素产生沿旋转方向的振动。主要针对高速列车牵引传动系统机电耦合振动现象及其影响因素进行分析,首先用双惯量模型表示传动装置,分析了机械结构的谐振频率,建立了高速列车传动系统模型,对系统稳定性以及参数影响度进行了分析,着重分析了速度控制器和电流环参数对稳定性的影响;然后在双惯量模型分析的基础上,建立了考虑齿轮箱弹性悬挂的扭转-弯曲耦合振动模型,将系统的电气振荡转化为机械振动,分析了系统电气参数对振动的影响;在小功率实验平台上,模拟再现了机电耦合振动现象,验证了本文的结论。

Traction drive system of high-speed train is a typical electromechanical coupling system. The systems are prone to vibrate along the direction of rotation due to their elasticity. In this paper, the electromechanical coupling vibration of the traction drive system and its influence factor were analyzed. Firstly, the mechanical structure of the drive systen in high-speed train was simplified into a two-mass model. The traction drive system model of high-speed train was established to analyze resonant frequency, system stability and influence parameters, where the influence of the parameters of speed controller and electric current loop on stability was particularly analyzed. Secondly, based on the analysis of the two-mass model, the torsion-bending coupled vibration model considering the elastic suspension of the gear box was established, which transformed system electrical oscillation into mechanical vibration, and analyzed the influence of the electrical parameters of the system on the vibration. Finally, a 1.1 kW electromechanical coupling vibration experimental platform was established to represent the shaft torsional vibration and prove the effect of influence factors.