本质安全电路的功率判别式  

Electric Power Criterion of Intrinsic Safe Circuits

作　　者：孟庆海[1] 牟龙华[1] 王崇林[1] 丁勇军 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008 [2]山东兖州兖矿集团兴隆庄煤矿,山东兖州272102

出　　处：《中国矿业大学学报》2004年第3期292-294,共3页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50077022)

摘　　要：基于本质安全电路的放电电流线性衰减模型,得到最大放电功率(Pmax)与放电能量(Wg)成正比,与电路时间常数(τ)成反比的结论.建立了电路本质安全性能的功率判别式,解释了小火花能够引爆气体而大火花却不能够引爆气体的现象,这是对常用的能量判别式的补充.指出在国家标准GB3836.4-2000中给出的最小点燃能量(Wmin)下,电路本质安全性能的能量判别式公式将不成立,而功率判别式照样成立.Based on linear current attenuation model of intrinsic safe circuits, it is concluded that maximum arc power (P_(max)) is in proportion to arc energy (W_g) and in inverse proportion to circuit time constant (τ). The electric power criterion of intrinsic safe circuits is founded. The phenomenon that smaller spark can cause gas ignition while bigger spark can not cause gas ignition is explaned using the criterion. The electric power criterion is a supplement to that of electric energy criterion. It is indicated that the electric energy criterion is invalid.

关 键 词：本质安全电路 放电电流 低能电弧 最小建弧电压 判别式 

分 类 号：TD685[矿业工程—矿山机电]