基于PLC控制的卷烟机组直流电源优化设计

Design of DC Power Supply for Cigarette Machine Based on PLC

针对现有卷烟厂车间设备种类繁多,维护排障较为麻烦等实际情况,也便于后续系统进行升级改造,设计了一种基于PLC控制的卷烟机组直流电源方案。采用厂内原有的西门子PLC作为主控制器,对直流电源电路进行控制,因此可与厂内现有MES系统进行信息互通,方便生产调度,优化设备利用率。其中主电路部分可实现将单相交流电转化成稳定的直流电或者脉冲直流电,以便供给不同直流设备使用。主电路由整流、滤波、稳压、逆变、变压、斩波等部分组成,通过模块化PLC程序的控制主电路和驱动电路,可实现多路输出,满足卷烟厂车间内各种直流检测设备、照明设备、显示装置、警示装置及生产设备的需求。该项目经调试已投入运行。实际运行结果表明:该系统运行可靠,简化设备,并将系统中所需要的直流设备进行整合,简化了硬件电路,减少了硬件设备的损耗,初步统计一个车间可节省电费约1500元/d,达到了方案设计的预期目的。

Aiming at the actual situation that there are many types of equipment in the existing cigarette factory workshop,and it is difficult to maintain and remove obstacles,which is also convenient for subsequent system upgrading and transformation,a DC power supply scheme for cigarette units based on PLC control is designed.The original Siemens PLC in the factory is used as the main controller to control the DC power circuit,so that information can be exchanged with the existing MES system in the factory,facilitating production scheduling,and optimizing equipment utilization.The main circuit can convert single-phase AC power into stable DC power or pulsed DC power for use by different DC devices.The main circuit is mainly composed of rectifier,filter,voltage stabilizer,inverter,voltage transformer,chopper,and other parts.Through the control main circuit and drive circuit of modular PLC program,multiple outputs can be achieved,meeting the requirements of various DC detection equipment,lighting equipment,display devices,warning devices,and production equipment in the cigarette factory workshop.The project has been commissioned and put into operation.The actual operation results show that the system operates reliably,simplifies the equipment,and integrates the DC equipment required in the system,simplifying the hardware circuit,reducing the loss of hardware equipment.According to preliminary statistics,a workshop can save about 1500 yuan/d in electricity costs,achieving the expected purpose of the scheme design.