矿用带式输送机双电动机传动同步控制策略研究

Research on synchronous control strategy of dual-motor drive for mine-used belt conveyor

  • 摘要: 针对传统基于电流差闭环的双电动机传动同步控制策略存在转矩、转速不同步,且未考虑双电动机系统受到负载干扰后产生的机械扭振问题,以矿用带式输送机双电动机传动系统为研究对象,提出了一种基于转速差闭环的双电动机传动同步控制策略。利用2台电动机的转速误差对电动机的电流信号进行补偿,当存在转速误差时,通过调整2台电动机的电流(转矩)进而调整转速,确保转速时刻保持同步;针对双电动机传动系统因负载扰动产生的机械轴扭振角,提出了一种扭振抑制策略,通过合理配置扭振角方程以保证扭振角呈现快速衰减振荡趋势,达到良好的扭振抑制效果。Matlab/Simulink仿真结果证明了该控制策略的可靠性。

     

    Abstract: In view of problems of asynchrony of torque and speed existed in traditional synchronous control strategy of dual-motor drive based on current differential closed-loop as well as mechanical torsional vibration caused by load disturbance is not considered, a synchronous control strategy of dual-motor drive for mine-used belt conveyor based on speed differential closed loop was put forward taking dual-motor drive system of mine-used belt conveyor as research object. The current signals of dual-motors were compensated by using rotate speed error between dual motors, if the rotate speed error of dual motors was produced, the rotate speeds were adjusted by adjusting currents (torque) of dual motors, so as to keep the rotate speeds in synchronization. For torsional angle of mechanical axis caused by load disturbance, a torsional vibration suppression strategy was proposed: torsional angle equation was allocated rationally to attenuate the torsional angle rapidly, so as to achieve good suppression effect for torsional vibration. Matlab/Simulink simulation results demonstrate reliability of the control strategy.

     

/

返回文章
返回