【摘要】 设计了基于LabVIEW软件开发平台的电闭环数控机床多伺服控制系统。利用西门子公司S120变频驱动模块,采用共直流母线的电闭环能量反馈系统,通过Profibus总线使S7-300 PLC与S120进行数据交流,同时PLC采集速度/转矩信号,进行PID闭环控制,用输出量控制S120逆变模块,达到精确控制转速/转矩的目的。同时S7-300高速串口模块与上位机LabVIEW软件系统通信进行数据交换。试验系统的成功运行,证明了此系统的控制可行性,通过电闭环控制方式可大幅提高电能的利用,对数控多伺服传动控制系统试验具有一定的指导意义。更多还原

【Abstract】 Electric closed loop multidrive NC servo control system was designed based on LabVIEW. A Siemens S120 variable frequency drive module and a electric closed loop power feedback system on one DC generatrix were used,so S7-300 PLC could exchange data with S120 through Profibus bus. At the same time,speed /torque signals were collected by PLC for PID closed loop control. Then S120 inverter module was controlled by PLC output,toachieve the goal of accurate control on speed /torque. High-speed serial module communicated with LabVIEW system host computer for date exchange. The test system runs successfully,and the control feasibility of the system is verified. Utilization of power is more effectively by using electric closed loop feedback,and it has certain significance to driving control system test.更多还原