Research and improvement of Leakage Protection System in Coal Winning Machine
Most of the Shearer adopt additional DC power protection,it has to protect a comprehensive,capacitive current compensation,the simple characteristics of action value of the tuning,however,it in the actual production will occur leakage protection device malfunction,tripping phenomenon For the leakage protection circuit in traction motor of coal winning machine is impacted by frequency converter devices in the course of their work,malfunctions appear frequently.This paper makes an in-depth analysis,analyzing the shortcomings of the current protection circuit,After the analysis of the interference signal,it is proposes a solution of using the subtraction circuit to offset interference signals and conducts a simulation analysis.The above scheme,which is simple and easily realized,can improve the reliability of leakage protection device in traction motor.Avoiding unnecessary production halts.The production efficiency can be improved.
Coal winning machine Traction motor Leakage protection Frequency converter
Xia CHEN Xinbo Xi Peng Chu Yongchun Pei Delan Wang
College of Information and Electrical Engineering of Shandong University of Science and Technology,Qingdao,266590,China
国际会议
广州
英文
419-422
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）