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本文通过对各种电火花加工大功率脉冲电源电路的分析对比，介绍了ＳＬＣ──Ｂ型储能电容一次放电可控硅开关电路的结构及其特点。文章还提出，采用后三角形电流脉冲能较好的适应石墨电极材料，加工后电极表面平整，相对损耗小。
In this paper, through the analysis and comparison of various high-power pulse power circuits for EDM, the structure and characteristics of the SLC-AB energy storage capacitor primary discharge thyristor switch circuit are introduced. The article also proposed that the use of post-triangular current pulse can better adapt to the graphite electrode material, the electrode surface after processing is flat, the relative loss is small.