电大论文矿山机电专业专科.doc

网络与继续教育学院 毕 业 论 文 论文题目：PLC矿井提升机变频调速控制系统设计 学 校： 武汉理工大学 层 次： 专 科 专 业： 矿山机电 摘要 矿井提升机是矿山最重要的设备，是沟通矿井上下的纽带。矿井提升机的可靠运行直接关系到煤矿生产的安全，矿井提升机电控系统的可靠性和准确性是矿井提升和安全运输的重要保证。当前国内矿井提升机主要还是以转子回路串电阻分段控制的交流绕线式电机继电器——接触器为控制系统，但是该系统的设备陈旧、技术落后，已不能满足煤矿的生产及安全需要。为了提高提升系统的安全性，本文以安全、可靠、高效、经济为出发点，对矿井提升机电控系统中转子电路串电阻调速部分进行改造研究，把可编程序控制器（PLC）和变频器应用于提升机控制系统上，由可编程控制器（PLC）控制变频器进行变频调速系统的设计。采用PLC控制系统，减少了硬件和控制线和传统继电器接触式控制系统的中间环节，极大提高了系统的稳定性，可靠性。在故障保护上采用软硬件相结合，电气拖动单元采用矢量控制变频调速方案。PLC控制矿井提升变频调速系统是运用高科技的新型电控系统，其克服了传统电控系统的缺陷，而且对提升机控制过程实现了程序化、数字化、自动化；其控制精度高，对速度、行程等重要参数及提升状态进行监控。 关键词：矿井提升机； PLC控制技术； 变频器 Abstract The shaft hoist is the foremost equipment of mines,mine is the communication link from top to bottom. The reliable operation of the mine hoist directly related to the coal mine safety, mine hoist control system reliability and accuracy is mine, and the importance of ensuring the safe transport. Currently, China mainly for mine hoist series resistance of rotor circuit in the exchange of sub-wound motor control relay - contactor to control the system, but the system obsolete equipment and backward technology can not meet the needs of coal production and safety . In order to enhance the system to improve security, this safe, reliable, efficient and economic as the starting point of the mine hoist control system, part of the rotor circuit series resistance to reform of speed, the programmable logic controller (PLC) and the inverter elevator control system used by the programmable logic controller (PLC) control inverter frequency control system. By PLC system, reducing hardware and control lines and traditional relay contact control system in the middle part, greatly improving system stability and reliability. Adopted in the fault protection software and hardware combination, electric drag unit is Vector Control program.Frequency Mine PLC control system is the use of high technology in the new electronic control system and its electronic control system to overcome