一种以PLC和变频器为核心的恒压供水系统的应用

The Application of PLC and Inverter in Constant Pressure Water Supply System

该文介绍了采用PLC和变频器控制的变频调速恒压供水系统,由PLC进行逻辑控制,由变频器进行压力调节。PLC和变频器作为控制系统的核心部件,经过变频器内部的PID运算,通过PLC控制变频与工频的切换,实现闭环自动调节恒压供水。系统具有压力稳定、节能、工作可靠等优点。

The paper introduces the application and the working principle of variable frequency and speed regulation system.We use PLC to carry on Logic control and inverter to modulate pressure.Through PID control principle in inverter,we realize closed-loop control in constant pressure water providing system.It has the advantage of stable pressure,saving power,working veracity and reliable work.