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WK挖掘机电气传动均采用直流发电机——直流电动机调速系统。随着电气系统的改进，新WK－2、WK－4型挖掘机直流发电机构采用双励磁绕组，控制系统也作了较大的改动，这样治系统电器备件采购产生困难。希望有一个价格合理的技术改造方案。用以下方案可以不必改造直流发电机励磁
WK excavator electrical transmission are used DC generator - DC motor speed control system. With the improvement of the electrical system, the new WK-2, WK-4 excavator DC generator with double excitation winding, the control system has also made major changes, so that the system of electrical procurement of spare parts have difficulty. Hope to have a reasonable price of technological transformation programs. With the following program can not be modified DC generator excitation