论文部分内容阅读
1系统概述行车是工矿企业中应用十分广泛的一种起重机械设备,我厂共有7台(其中10吨5台,5吨2台)。其电气控制为继电器控制,每天工作量大,为达到重载启动、调速,靠采用交流异步电机转子通过滑环碳刷串变阻器实现。因电阻频繁切换,
1 System Overview Driving is a kind of crane used widely in industrial and mining enterprises. There are totally 7 sets in our factory (5 sets of 10 tons, 2 sets of 5 tons). The electrical control of the relay control, heavy workload every day, in order to achieve heavy start, speed, by using AC induction motor rotor through the slip ring carbon brush resistor. Frequent switching due to resistance,