【正文】 T Shaft hoist is an important equipment in mining industries, which is inseparable in the transportation of mineral and personnel. Chinese traditional shaft hoist use relay contactor to control mainly, and achieve startup and speed governing by the motor rotor circuit in series with additional resistances. This control system has many disadvantages, such as lower reliability, higher failure rate, more plex operation, more power waste, and lower efficiency. As for the problems of traditional shaft hoist, this design achieves hoist speed control by using programmable logic controller system, which bined with frequency converters. Through my intensive study in hoist system, I have pleted hoist control system design, the size choice of the hardware device, and finish hardware system design, including the design of detection module, control module, protection module, and antijamming module. Finally, I carry on the system integration and debugging. Depending on the hardware system requirements, I draw external wiring diagram and write control system program. Through the programmable logic controller, mine hoist can realize its start, acceleration, constant speed, deceleration, crawling and parking operations, and monitor stoppages such as overload, overspeed, and volume. Programmable logic controller uses PLC, and it is hardware simplicity, strong software flexibility, easy missioning, little maintenance. It can provide the shaft hoist safe operation with favorable environment, bined with some control equipment equipped with electronic modules hoist. At the same time, it can test the safety performance of shaft hoist, and feedback to the control device. In this way, the intermediate links of traditional relaycontact control system are reduced, hardware and control lines are reduced, the stability and reliability of tantamount are improved. Frequency control successfully realizes that Ac motor is in a wide range of stepless smooth speed regulation, by taking advantage of changing the power frequency of the controlled object. With this control system, the hoist is reliable, easy to use, and it has the function of dynamic display, as well as its energysaving effect is obvious. It will bee the inevitable trend of history to transform mine hoist control system by applying Programmable Controllers – Drive. Keywords: shaft hoist。 PLC。control system 目 錄 1 引言 ........................................................................................................................................ 1 國內外礦井提升機發(fā)展現(xiàn)狀 ..................................................................................... 1 我國礦井提升機電氣控制系統(tǒng)的現(xiàn)狀 ........................................................... 1 國外提升機電氣控制系統(tǒng)的現(xiàn)狀 .................................................................. 1 存在的問題及最新發(fā)展 ............................................................................................. 2 本文承擔的任務 ......................................................................................................... 3 2 礦井提升機系統(tǒng)的控制要求 ................................................................................................ 4 礦井提升機結構介紹 ................................................................................................. 4 礦井提升機速度和受力分析 ..................................................................................... 4 提升機的速度分析 .......................................................................................... 4 提升機的受力情況 .......................................................................................... 5 礦井提升機的調速控制方案分析 ............................................................................. 7 傳統(tǒng)轉子回路串電阻調速系統(tǒng) ...................................................................... 7 模糊控制調速系統(tǒng) .......................................................................................... 7 直接轉矩控制系統(tǒng) .......................................................................................... 8 變頻器調速控制系統(tǒng) ...................................................................................... 8 礦井提升機調速系統(tǒng)的確定 .......................................................................... 9 3 提升機調速控制系統(tǒng)硬件設計 .......................................................................................... 10 提升機變頻控制部分設計 ....................................................................................... 11 變頻器 簡介 ..................................................................................................... 11 變頻調速基本原理 ........................................................................................ 12 提升機變頻器的選擇 .................................................................................... 13 變頻器的調試 ................................................................................................. 14 提升機系統(tǒng)變頻器外部電路設 計 ........................................................................... 16 提升機調速系統(tǒng)的聲光報警回路 ................................................................ 17 提升機調速系統(tǒng)的制動控制回路 ................................................................ 17 編碼器反饋回路 ............................................................................................ 19 提升機調速系統(tǒng)的 PLC 控制部分設計 ................................................................. 20 PLC 簡介 ......................................................................................................... 20 PLC 的選型 ..................................................................................................... 20 提升機調速系統(tǒng)的 PLC 的 I/O 端口 ............................................................ 21 提升機調速系統(tǒng)的 PLC 外部電路設計 ....................................................... 22 提升機調速系統(tǒng)各部分的 PLC 控制 ........................................................... 23 4 系統(tǒng)抗干擾措施 ........................................................