Design and Research of Frequency Conversion Centralized Control System for Mine Ventilation Fan Based on PLC
In response to the problems of high starting current,low operating efficiency and reliability,and high energy consumption in the traditional starting and operating methods of the main ventilation fan in the coal mine ventilation system,PLC control and variable frequency speed control technology are adopted to transform and design the control system of the main ventilation fan.The system uses dual redundant PLC as the control core and frequency converter as the speed regulation device.By establishing a communication network composed of industrial Ethernet,it completes the interconnection and intercommunication between the upper and lower shafts,achieving intelligent functions such as remote centralized monitoring of the main ventilation fan,variable frequency speed regulation of the motor,and adaptive adjustment of the output air volume.In practical applications,the system can effectively improve the underground gas concentration and air volume stability,achieving energy-saving and consumption reduction.
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