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| Research on the design and implementation of frequency conversion control system for coal mine hoist |
| Li Benfeng |
| Zhengzhou Coal Group Zhengxin Company, Zhengzhou 450000, China |
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Abstract As an important transportation equipment in coal mine, the hoist has high performance requirements for the control system. In this paper, the JK-2.5×2P hoist of Pingdingshan No.12 Mine is taken as the research object. Based on the analysis of the characteristics of the speed change of the hoist, the frequency conversion control system of the hoist is designed based on the S7-400 PLC controller. The inverter model used in the system is 6SL3210 -5BE21-5U V0.Both the controller and the inverter are Siemens products to ensure the compatibility between the hardware. The software program of the control system mainly includes the main program and multiple subroutines. The main program can call different types of subroutines according to actual needs during operation, and can be called nested. The designed frequency conversion control system has been applied in Pingdingshan No.12 Coal Mine for about one year. Through data comparison and analysis, it is found that the equipment failure rate and energy consumption are reduced by about 10 % and 15 %, respectively. The safety and economic benefits are remarkable, and the expected results are achieved.
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| 象，结合煤矿的实际需要对提升机的变频控制系统进行研究与设计，工程实践应用表明，系统性能良好。设计的变频控制系统以PLC控制器为核心，利用编码器实现主电机转速检测，利用磁开关实现罐笼位置检测，实现提升机不同阶段速度的精确控制；PLC控制器和变频器选用西门子S7-400和6SL3210-5BE21-5UV0，保证硬件之间的兼容性；系统的软件程序方面，根据系统的功能需要设计多个子程序，主程序运行时可以调用子程序，且能够嵌套调用。设计的控制系统在平煤十二矿实际生产中应用1 a以上，设备故障率降低了10%，提升机能耗降低了15%，达到了预期效果，安全效益和济效益显著。
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