基于PLC的矿并提升机变频调速系统设计与仿真

发布时间：2018-03-08 10:15

本文选题：变频调速　切入点：矿井提升机　出处：《内蒙古大学》2015年硕士论文　论文类型：学位论文

【摘要】：矿井提升机,作为煤矿生产系统中用来联系井上井下的枢纽运输设备,素有煤矿“咽喉”之称,其运行性能和可靠性直接关系到煤矿生产能力以及作业人员的生命安全。然而,当前我国大多数矿用提升机依旧通过采用绕线式异步电机转子回路串电阻的方式来实现其调速要求,这种传统的控制方式,虽具备操作简单,初期投资较小等优点,但是由于存在电气及机械冲击、能耗较大、控制精度较低并且调速效果不够理想,其弊端正日益显现。本课题以徐矿集团夹河煤矿的副井提升机系统为研究背景,利用西门子自动化软件STEP 7组态硬件,编制梯形图,实现所设计S型速度曲线控制逻辑,并利用PLCSIM软件进行程序调试及系统仿真,观测输入输出继电器、中间继电器以及定时器等的状态变化是否符合设计预期。对变频调速系统的监控组态设计是通过组态软件Wincc来实现,通过功能完善且友好的人机界面,实时获取系统工况参数。本设计采用S7-300 PLC作为逻辑控制器,选用西门子MM420变频器,配合三相绕线式异步电机,构建变频调速开环控制系统,组态硬件并下载程序至PLC,变量表监视运行,并进行变频器快速调试以及参数设置,以及系统调试,于提升周期的五个运行阶段内,使电机转速输出符合S型速度变化规律,系统测试运行效果符合所预期五阶段式S型速度变化规律,控制效果符合设计要求。
[Abstract]:The mine hoist, which is used in the coal mine production system to connect the hub transportation equipment on the well, is known as the "throat" of the coal mine. Its operation performance and reliability are directly related to the production capacity of the coal mine and the life safety of the workers. At present, most mine hoists in our country still adopt the method of winding type asynchronous motor rotor circuit series resistance to realize its speed regulation requirements. Although this traditional control mode has the advantages of simple operation and small initial investment, etc. However, due to the existence of electrical and mechanical shocks, high energy consumption, low control precision and insufficient speed regulation, the disadvantages of the system are becoming increasingly apparent. The research background of this subject is the auxiliary shaft hoist system of Jiahe Coal Mine. By using Siemens automatic software STEP 7 configuration hardware, trapezoidal diagram is compiled to realize the control logic of S-type velocity curve. The software PLCSIM is used to debug and simulate the system and observe the input and output relays. Whether the state changes of intermediate relays and timers meet the design expectations. The configuration design of frequency conversion speed control system is realized by configuration software Wincc, and the function is perfect and friendly man-machine interface. In this design, S7-300 PLC is used as logic controller, Siemens MM420 inverter is selected, and three-phase winding asynchronous motor is used to construct the open loop control system of frequency conversion speed regulation. Configuration hardware and download program to PLC, variable table monitor running, and carry on the frequency converter fast debugging, parameter setting, and system debugging, in the five operation stages of the lifting cycle, the motor speed output conforms to the S-type speed change rule. The system test results accord with the expected five-stage S-type speed changes and the control results meet the design requirements.
【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD633;TP273

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