PLC-based electric mine hoist control
Institute of Physics and Electrical and Mechanical Services Electronic and Information Engineering
200504228 Liu Hejia The guidance of teachers:Wang Zhuhua(Associate Professor)
Abstract: China's mines are hoist AC Induction Motor Drive,and its electrical control system uses a rotor series, cutting speed resistance ,by the relay - contactor control devices constitute a logical. In this paper, a safe, reliable, efficient and economic as the starting point, reliability based on the principle of exchange of mine hoist control system of electric circuit series resistance of the rotor speed control part, runs research design, by the programmable logic controller (PLC) to replace the relay - contactor control devices consisting of logic. In this paper, JTK-1.6X1.2 mine hoist for example, a research and design programs, combined with the actual situation of the actual field application of hoist modify study to enhance the improvement of mechanical and electrical control system design and optimization. PLC electrical control system to enhance the process of realization of the process control, high precision; to achieve speed, current as well as the vector, such as digital switching, the closed-loop regulation of hoist carried out; the realization of stroke, speed and other important parameters and to enhance the status of realization of a touch monitor control, long life, reliability, greatly increased; has a good monitoring system to control..
Key words: Hoist Electrical Control System The Programmable Logic Controller Improve
