文档介绍：煤矿提升机变频调速拖动及PLC控制系统初步设计
摘要
目前,我国绝大部分矿井提升机(超过80%)采用传统的交流电控系统。这种电控系统起动和调速换挡过程中电流冲击大;属于有级调速,调速的平滑性差;低速时机械特性较软,静差率较大;故障率高,节能效果差等。为克服传统交流绕线转子异步电动机串电阻调速系统的缺点,采用PLC与变频器相结合的控制方案对传统电控系统进行改造,变频调速是通过改变定子供电频率,成功实现了提升电动机大范围的无级平滑调速,在运行过程中能随时根据电动机的负载情况,使电机始终处于最佳运行状态,能够满足提升机特殊工作环境的要求且有着明显的节电效果;采用PLC对提升系统进行保护和监控,使系统更加安全可靠。
关键词:提升机调速变频器 PLC
Mine hoist speed-adjusted drag and PLC control system design
Abstract
At present, the vast majority of mine hoist (more than 80%) using the traditional control system of alternating current. This electronic control system start-up and speed the process of shifting the impact of major current; are in-class speed, smooth speed control poor; low mechanical properties when the soft, quiet larger gap; high failure rate, energy-saving effect of poor . In order to e the traditional exchange of string wound rotor induction motor speed control system of the ings of resistance, the use of PLC and inverter control scheme bines the traditional GM electronic control systems, variable frequency speed control is by changing the stator supply frequency, the essful implementation of the enhance a wide range of motor smooth stepless speed control, the process can run at any time based on motor load conditions, so that motor is always running at its best to meet the lift requirements of the special working environment and have a clear energy-saving effect; used PLC to enhance the protection and monitoring system, allowing the system to a more safe and reliable.
Keywords:mine hoist electric controlled system PLC transducer transformation
目录
符号说明 IV
前言 1
第一章 煤矿提升机 3
§ 3
§ 4
§ 5
§ 煤矿提升机的拖动与控制过程 7
第二章 变频器及其电路设计 9
§ 9
§ 11
§ 17
第3章基于PLC控制的大功率矿井提升机控制系统设计 19
§ 变频调速控制系统概述 19
§ PLC控制系统设计 20
§ PLC控制程序设计 29
§ 提升机在快速、减速或急停时的再生发电能量处理问题 32
第4章 其它电路设计 37
§ 旋转编码器的安装设计 37
§ 液压站的设计 40
第5章抗干扰电路设计 47
§ 主电路抗干扰措施 47
§ 电抗器的作用及选择 50
§ 主电路其他抗干扰对策 52
结论 54
参考