摘要
由变频器和压力传感器构成PID闭环控制系统,由PLC根据变频器输出的频率上下限信号通过继电器组进行水泵的工频-变频切换及数量的控制,两者结合实现恒压供水。
PID closed-loop control system consists of sensors and pressure transducer.The PLC controls frequency switching and volume in accordance with the frequency converter output signal through the upper and lower limits pump relay team-frequency,and a combination of both achieves constant pressure water supply.
出处
《新乡学院学报》
2010年第5期66-67,共2页
Journal of Xinxiang University
关键词
变频器
PID
恒压供水
inverter
PID
constant pressure water supply
