延弧回路參數對延弧效果影響的分析
李偉昭，劉祥云，李威
中機國際(西安)技術發展有限公司，陜西 西安 710054
摘 要：介紹了RC延弧回路的工作原理，分析了延弧回路各參數對電弧電流過零點斜率、延弧電流峰值大小、延弧電流峰值后時間常數的影響。利用Matlab軟件計算分析可知，電弧電流過零點斜率受延弧電容的影響可以忽略，延弧電流峰值大小主要由充電電壓與延弧電阻決定，峰值后時間常數主要決定于延弧電阻和延弧電容。根據各因素的影響程度，結合實際延弧回路參數，即可優化延弧效果。
關鍵詞：延弧回路；RC回路；電流上升率
中圖分類號：TM835 文獻標識碼：A 文章編號：1007-3175(2015)08-0027-03
Analysis of Arc Prolong Circuit Parameter Impacts on Arc Prolong Results
LI Wei-zhao, LIU Xiang-yun, LI Wei
CNME International Co., Ltd, Xi’an 710054, China
Abstract: Introduction was made to the working principle of RC arc prolong circuit. This paper analyzed the impacts of arc prolong circuit parameters on the slope of arc current passing through zero point, the peak value of arc prolong current and the time constant after the arc prolong peak value. The software Matlab calculation shows that the impacts of arc prolong capacitance on the slope of arc current passing through zero point could be ignored. The peak value of arc prolong current mainly depends on charging voltage and arc prolong resistance and the time constant after the arc prolong peak value mainly depends on arc prolong resistance and capacitance. According to the influence degree of various factors, combined with actual arc prolong circuit parameters, the effectiveness of arc prolong could be optimized.
Key words: arc prolong circuit; RC circuit; current increase rate
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