交流电动机群的运行监控
摘要:介绍了智能化交流电机测控系统的功能以及基于的系统硬件软件的的设计。实验结果表明:该智能化交流电机测控系统具有运行可靠、操作方便以及功能完善等优点,有着广阔的应用前景。可编程序控制器(PLC)是一种新型的通用自动控制装置,它将传统的继电接触控制与微机技术融为一体,具有可靠性高、体积小、编程简单、维护方便等一系列优点,因此在工业生产中的应用日益广泛。用三棱公司FX2N型可编程序控制器与接触器结合,实现了三相电动机的定子串电抗降压起动、正反向控制、短接制动以及过载、断相保护,可实现电机的短路过流、堵转过流、过载反时限、欠载(空载)、过电压、欠电压、漏电、相间不平衡和电机定子过温度等保护,它比传统上的控制和保护方式更加方便而可靠。其中PLC及其扩展板部分重点介绍了模拟量输入模块FX2N—4AD、PT-100型温度传感器用模拟量输入模块FX2N—4AD—PT和PLC的I/O连接设计。软件设计部分包括主程序模块、启动/停机控制、电流测控、电压测控、温度测控、速度测控、显示、报警模块的编程设计。其中显示、报警模块部分重点介绍了显示主程序、MAX7219初始化、向MAX7219送地址或数据、MAX7219数据装载、翻页显示和报警子程序的编程设计。同时在设计交流电动机群的测控过程中介绍了几种比较新的传感器的应用,如CSD系列电流开关、磁补偿式电压传感器等,还介绍了MAX7219的工作原理及条图显示电路。模拟实验表明:该交流电动机群的智能化测控系统具有运行可靠、操作方便以及功能完善等优点,有着广阔的应用前景。
关键词: 测控保护 PLC 传感器
Alternating current flying contingent intelligent
to observe and control the system
Abstract: Whether it recommend and exchange intelligently electrical machinery last systematic function and on the basis of hardware software not systematic design. The experimental result shows : Should intelligent to exchange electrical machinery observe and control system have and operate reliable, easy to operate and getting with perfect function merit, There are wide application prospects . Can programme controller( PLC) one new-type in common use automatic control device, It continue a traditional one electricity exposed to and control and combine with computer together by technology, have dependability to be high small, programming simple, maintain a series of merits such as being convenient, So the application in industrial production is extensive day by day. Can programme with triangular company FX2n type controller combine with the contactor, Realize three- phase stator clusters of reactance of motor step down and start, not positive and negative to control, not short to connect apply the brake and overload, broken to protect , Can realize short circuit of electrical machinery flow, stop up and turn over flow, overload against time limit, owe year( unloaded), Overvoltage,, voltage of owing, leak electricity, not alternate and uneven and electrical machinery stator pass temperature,etc. protect, It is more convenient and reliable than the control traditionally and protected mode.