采煤机牵引电动机漏电保护装置的研究与改进

Research and Countermeasure of Leakage Protection System in Traction Motor of Coal Winning Machine

针对采煤机牵引电动机漏电保护电路在工作过程中受变频调速装置的影响,频繁出现误动作的问题进行了深入分析,提出了利用减法电路抵消干扰信号的解决方案,并对此进行了仿真分析。该方案设计简单,容易实现,可有效提高牵引电动机检漏装置动作的可靠性。

For leakage protection circuit in traction motor of coal winning machine was impacted by frequency converter devices in course of their work,and appeared malfunctions frequently,this paper made an in-depth analysis,proposed solution of using subtraction circuit offset interference signals and carried on simulation.The above scheme,which is simple and easily realized,can improve reliability of leakage protection device in traction motor.