With the constant development of economy in China, the scale of the coal mining is increasing rapidly. As main equipment in the fully mechanized working face, electric traction shearer has important influence on coal utilization efficiency and production, so it occupies an important position. At the same time, due to the bad working environment in the working face of the shearer, it requires higher reliability and working efficiency of the shearer. Frequency converter is the core control part of electric traction shearer, so it is very important to judge and remove its every possible fault, which is essential for keeping the efficiency of the shearer and enhancing production safety.%随着我国经济的不断发展，煤炭能源开采的规模越来越大，电牵引采煤机作为综采工作面的主要配套设备，对煤炭的利用效率及开采量有着重要的影响，占据着重要的地位。同时，由于采煤机工作面工作环境的恶劣，对采煤机的可靠性及其工作效率有着较高的要求。变频器作为电牵引采煤机的核心控制部分，出现故障后准确判断并排除故障，对发挥采煤机的效率、加强安全生产具有重要的意义。
展开▼
