组合式二用一备变频系统PLC控制器  

Combination Type of Two-in-Service and One-Standby PLC Controller for Variable-Frequency System

作　　者：姜信建 姜上川[2] 

机构地区：[1]中国洛阳浮法玻璃集团有限责任公司,河南洛阳471009 [2]清华大学,北京100084

出　　处：《电器与能效管理技术》2014年第17期17-21,共5页Electrical & Energy Management Technology

摘　　要：介绍了组合式二用一备变频系统PLC控制器。系统主回路用2个变频器控制3个受控电动机;控制回路采用PLC控制器,通过PLC梯形图程序,实现由2个变频器对3个受控电动机进行二用一备任意组合状态的切换控制。采用的控制系统适用于集中控制场合,具有控制精度高、最大限度减少设备硬件成本等特点。This article introduced the combination type of two-in-service and one-standby PLC controller for variable-frequency system.The main circuit consists of two frequency converters to control three motors.Besides,the control circuit employs the PLC controller to implement the switching control on any combination of the three controlled motors M1 ~M3 by two frequency converters VF1 ~VF2 as two-in-service and one-standby state via the PLC ladder diagram program.This control system is applicable for centralized control occasions,with the advantages of high control accuracy and minimized cost of hardware equipment.

关 键 词：组合式 二用一备 变频器 PLC梯形图 控制器 

分 类 号：TM571[电气工程—电器]