CHEN Xia（陈霞）, XI Xin-bo（席新博）, CHU Peng（褚鹏）, PEI Yong-chun（裴咏春）,YIN Jun-hua（尹俊华）, WANG De-lan（王德兰）
(College of Information and Electrical Engineering,Shandong University of Science and Technology, Qingdao 266590, China)
Abstract：Because the leakage protection circuit in traction motor of coal mining machine is impacted by frequency converter devices, malfunctions appear frequently. This paper makes an in-depth analysis, 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.
Key words：coal mining machine; traction motor; leakage protection; frequency converter
CLD number： TM922.71 Document code： A
Article ID： 1674-8042(2012)03-0294-04 doi： 10.3969/j.issn.1674-8042.2012.03.019
References
[1] “Coal Mine Safety Regulations” Reader Editorial Board. Coal mine safety regulations. Beijing: Coal Industry Press, 2004: 459-462.
[2] WU Yu-lu. The principles and applications of the motors and their integrated protection device. Beijing: Coal Industry Press, 2004: 19-22.
[3] Chan K. The PWM frequency control and soft switching power conversion technology. Beijing: Mechanical Industry Press, 2001: 132-144.
[4] HAN Bing-xing, XIANG Zhi-wu, XU Sen-xiang. AC variable speed device leakage protection. Colliery Mechanical & Electrical Technology, 1999(5): 12-14.
[5] ZHANG Yin, ZHOU Meng-ran. Coal mine grid leakage faults and the analysis of protection technology. Coal Mine Machinery, 2006, 27(12): 183-185.
[full text view]
