PLC与变频器在恒压供水控制系统中的应用  

Applied PLC and inverter to constant pressure water supply system

作　　者：罗锋华[1] 房驰 程豪[1] 

机构地区：[1]江西现代职业技术学院,330095

出　　处：《机床电器》2011年第4期27-30,共4页Machine Tool Electric Apparatus

摘　　要：用PLC与变频器控制的高楼恒压供水系统,采用PLC进行逻辑控制,变频器进行压力调节。PLC与变频器作为系统控制的核心部件,时刻跟踪管内压力与给定压力的偏差变化,经变频器内部PID运算,通过PLC控制变频与工频切换,自动控制水泵投入的台数和电机转速,实现闭环自动调节恒压变量供水,在保持恒压下,达到控制流量的目的。With PLC and inverter control constant pressure water supply system,high-rise buildings,the use of PLC logic control,the inverter for pressure regulation.PLC control and frequency converter as a core part of the system,keeps track of the tube pressure and the deviation of a given change in pressure,the drive internal PID operation,through the PLC control frequency and the frequency switching,auto-control pump station into the number and the motor speed to achieve closed loop automatically adjusts the constant pressure variable water supply,while maintaining Huan pressure,to control flow purposes.

关 键 词：PLC 变频调速 恒压供水 PID控制 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]