随铬含量的增加焊道由光滑到不连续，焊接工艺性能变差。

Welding process get worse with an increase in chromium content and smooth bead turn to be discontinuous.

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文章就典型的直流双闭环调速系统设计方法进行说明。针对电枢电流不连续时，系统参数发生变化，造成系统性能变差，列出相应的电流环调节器参数的求法。

For solving the problem that DC variable speed system becomes unsteady when armature current is seriously discontinuous, a parameter variable regulator is presented in this paper.

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