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一、概述目前,国产大型挖掘机,如我厂生产的WD-400型、WD-1200型挖掘机的电气控制系统,都采用了可控硅控制方式。该控制系统工作可靠、性能稳定,经几年矿山使用考核,深受用户的欢迎。但是,由于本系统的路线与“三绕组发电机”和“磁放大器励磁”控制系统的线路相比,要复杂一些,各个环节相互之间牵扯较大。一旦出现故障,如不掌握检查修理技巧,就会无从下手。而大型挖掘机大都使用在大型矿山和水利工地的关键地段,工作任务重,对
I. Overview At present, the domestic large excavators, such as the WD-400 WD-1200 excavator’s electrical control system manufactured by our factory, adopt the SCR control mode. The control system is reliable, stable performance, after several years of mine assessment, welcomed by users. However, because the route of this system is more complicated than that of the control system of “three-winding generator” and “magnetic amplifier excitation”, each link involves a lot with each other. In the event of failure, if you do not have the skills to check and repair, you will not be able to start. The large excavators are mostly used in the key sections of large-scale mines and water conservancy sites, heavy task, right