摘要
为了实现铁合金多段速定点浇注系统的自动控制,探讨了基于西门子S7-200系列PLC226CN与MM440变频器之间联机实现多段速自动控制系统。论述了PLC系统、变频调速的原理及控制方式、多段速自动控制及系统稳定性等问题,通过工业运行验证该控制系统有抗强磁场干扰、运行稳定的优点,可在铁合金浇注成形设备上推广应用。
In order to achieve automatic control of the ferroalloy multistage speed fixed-point casting system, the multistage speed automatic control system which is based on the Siemens S7-200 series PLC226CN and the MM440 inverter working on-line are discussed in this paper. The PLC system, principle and control mode of the frequency control, multistage speed auto-matic control and system stability are also analyzed. The control system is verified by industrial operation that it has the advan-tages of strong magnetic field interference, running stability, and it can be applied in the ferroalloy casting forming equipment.
出处
《机械研究与应用》
2015年第6期173-175,184,共4页
Mechanical Research & Application
