总线式固体接触器设计  

Design of Bus-Type Solid Contactor

作　　者：张莉[1] 邬宝寅 ZHANG Li;WU Baoyin(Department of Mechanical Engineering,Zhengzhou College of Science&Technology,Zhengzhou 450064,China;Suntront Tech Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]郑州科技学院机械工程学院,河南郑州450064 [2]新天科技股份有限公司,河南郑州450001

出　　处：《自动化仪表》2022年第10期45-48,52,共5页Process Automation Instrumentation

基　　金：河南省科技攻关计划基金资助项目(172102210536);河南省高等学校重点科研基金资助项目(16A460027)。

摘　　要：为解决传统机械触点式接触器存在的线材消耗较多、控制距离较近、需要集中安装等问题,采用微控制器技术和电力晶体管技术,设计总线式固体接触器。采用功率晶闸管控制触点通断、微型互感器测量电路检测电源和负载工作状态、带有中继缓存功能的RS-422双向全双工总线传输控制指令和测量数据,实现通过单一通信接口对安装范围较大、安装数量较多的接触器的通断控制和状态监控。与传统接触器控制相比,该设计更加节省导线和控制接口、安装更加灵活。通过设计总线式固体接触器结构、硬件电路和通信协议,以及编写微控制器程序和制作样机,实现了接触器的基本功能。总线式固体接触器的应用可提高工业控制系统的智能化水平。To solve the problems of traditional mechanical contact type contactors such as more wire consumption,closer control distance and the need for centralized installation,the bus-type solid contactor is designed using microcontroller technology and power transistor technology.The power thyristor is used to control the contactor on/off,the miniature transformer measurement circuit detects the power supply and load working status,and the RS-422 bidirectional full-duplex bus with relay cache function transmits the control command and measurement data to realize the on/off control and status monitoring of contactors with large installation range and large installation number through a single communication interface.Compared with conventional contactor control,this design is more wire and control interface saving and more flexible installation.The basic functions of the contactor are realized by designing the bus-type solid-state contactor structure,hardware circuit and communication protocol,writing the microcontroller program,and building the prototype.The application of bus-type solid contactors can improve the intelligence of industrial control systems.

关 键 词：接触器 总线式 微控制器 晶闸管 互感器 RS-422 中继缓存 通信协议 

分 类 号：TH-39[机械工程]