关键词: 矿井提升机, 变频调速, PLC, S形曲线, 上位机监控

Abstract: The speed regulation control system of mine AC hoist based on PLC was designed by adopting S7-300 PLC as controller and 6SE70 as frequency converter for special operational environment of mine. The system used the real-time monitoring work state of the upper computer,and set up security protect measures and fault processing function. The given hoist speed could be realized by S-shape speed curve which produced by PLC control software to increase speed regulation capability and precision. The practice proved that this system can fulfill the need of hoist speed regulation,and have characteristics of high reliability,strong flexibility,low fault rate with a good locale application effect.

Key words: Mine hoist, Frequency conversion and speed regulation, Programmable logic controller (PLC), S-shape curve, Upper computer monitoring